CONTROLLING OUTPUT OF ELECTRONIC LABELS FROM A CAMERA

Abstract

A system (300) and a related method (100) for controlling an optical output of at least one electronic label in a retail environment is provided. The system comprises a camera (310) comprising a transmitter for transmitting a control signal (380, 381) and an electronic label (320) comprising a receiver (325) for receiving the control signal and wherein the electronic label is adapted to change its optical output in response to the control signal, the electronic label is arranged within the field of view of the camera. The camera is adapted to receive an identifier of the electronic label and transmit a control signal comprising the identifier and wherein the electronic label is adapted to receive the control signal comprising the identifier and change its optical output based on that the identifier comprised in the control signal matches an identifier of the electronic label.

Claims

1. A method controlling an optical output of an electronic label in a retail environment, wherein the electronic label comprises a receiver for receiving a control signal and is adapted to change its optical output in response to the control signal, the electronic label is arranged within a field of view of a camera, the camera comprising a transmitter for transmitting a control signal, the method comprising: receiving, by the camera, an identifier of the electronic label; transmitting, by the camera, a control signal comprising the identifier; receiving, by the electronic label, the control signal comprising the identifier; and changing the optical output of the electronic label based on that the identifier comprised in the control signal matches an identifier of the electronic label.

2. The method according to claim 1, wherein receiving, by the camera, an identifier of the electronic label comprises at least one of determining an identifier of the electronic label using the camera and receiving, by the camera, the identifier from a server.

3. The method according to claim 1, wherein the control signal is transmitted to electronic labels arranged in the field of view of the camera.

4. The method according to claim 1, wherein the control signal is transmitted in a direction, and wherein the control signal is transmitted using at least one of a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal and a sound signal.

5. The method according to claim 1, further comprising: verifying the change in optical output using the camera.

6. The method according to claim 1, wherein the identifier comprises a predetermined unique identifier.

7. The method according to claim 1, wherein the identifier comprises a shortened unique identifier.

8. The method according to claim 1, wherein the control signal further comprises information associated with a change in optical output of the electronic label and wherein the change in optical output by the electronic label is based on the information.

9. The method according to claim 8, wherein the information comprises at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image.

10. The method according to claim 1, wherein the control signal further comprises information associated with a request of data transfer from the electronic label to the camera.

11. The method according to claim 1, further comprising: receiving, by the camera, a triggering signal; triggering the camera to start determining an identifier of the electronic label based on the triggering signal.

12. The method according to claim 1, further comprising: triggering the camera to start transmitting the control signal; wherein the triggering signal is generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

13. The method according to claim 1, wherein determining an identifier of the electronic label comprises: transmitting a control signal from the camera to the electronic label; controlling the electronic label to change its optical output based on the control signal; capturing a plurality of images containing the electronic label; and determining an identifier of the electronic label by analyzing the optical changes in the images.

14. A system for controlling an optical output of at least one electronic label in a retail environment, wherein the system comprises; a camera comprising a transmitter for transmitting a control signal; an electronic label comprising a receiver for receiving the control signal and wherein the electronic label is adapted to change its optical output in response to the control signal, the electronic label is arranged within a field of view of the camera; wherein the camera is adapted to receive an identifier of the electronic label and transmit a control signal comprising the identifier and wherein the electronic label is adapted to receive the control signal comprising the identifier and change its optical output based on that the identifier comprised in the control signal matches an identifier of the electronic label.

15. The method according to claim 2, further comprising: verifying the change in optical output using the camera.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0076] This and other aspects will now be described in more detail in the following illustrative and non-limiting detailed description of embodiments, with reference to the appended drawings.

[0077] FIGS. 1a-1b schematically illustrates a perspective view of the system according to an embodiment.

[0078] FIG. 2 schematically illustrates a perspective view of the system according to an embodiment.

[0079] FIG. 3 schematically illustrates a perspective view of the system according to an embodiment.

[0080] FIGS. 4a-4b schematically illustrates a flow chart of the method according to an embodiment.

[0081] All the figures are schematic, not necessarily to scale, and generally only show parts which are necessary in order to elucidate the embodiments, wherein other parts may be omitted. Like reference numerals refer to like elements throughout the description.

DETAILED DESCRIPTION

[0082] A system (300) for controlling an optical output of at least one electronic label in a retail environment according to an embodiment will be described with reference to FIG. 1a-1b.

[0083] FIGS. 1a-1b illustrates the system 300. The system 300 may comprise an electronic label 320. The electronic label 320 may be associated with a product type of one or more product units 327. The electronic label 320 may comprise an identifier. The identifier may be unique for the electronic label 320. In other words, the identifier may comprise a predetermined unique identifier. The identifier may comprise a shortened unique identifier.

[0084] The unique identifier may be assigned to the electronic label 320 during for example manufacturing. The unique identifier may be a predetermined unique identifier. The unique identifier may be unique globally, i.e. the unique identifier may be a global identifier. In other words, the identifier may be used to identify the electronic label 320 globally. The unique identifier may comprise at least one of a hash code, a numeric code, a hexadecimal code, a binary code. In other words, the unique identifier may comprise an identifying string of text, numbers, hexadecimal code, binary code or the like.

[0085] By a shortened unique identifier it may be meant an identifier of the electronic label 320 having an identifier with less possible distinguishing variations compared to that of the unique identifier. A shortened unique identifier, or a local identifier, may comprise less characters in order to have one specific electronic label distinguished from another compared to when distinguish an electronic label from another globally.

[0086] For example, a first number of electronic labels may form a set of electronic labels and a second number of electronic labels may form a subset of electronic labels. The subset of electronic labels may be at least part of the set of electronic labels. Each electronic label in the set of electronic labels may be distinguishable by the global identifier and each electronic label in the subset of electronic labels may be distinguishable by the local identifier. The local identifier may comprise less characters than the global identifier, i.e. a shorter hash-code or the like.

[0087] This is illustrated in FIG. 1a as a signal comprising the global identifier, for example, ABC123 that may be transmitted together with for example information associated with a product type and/or a signal comprising the local identifier of, for example, 123 that may be transmitted together with the information associated with a product type. Where in the information associated with a product type may comprise at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image.

[0088] The system 300 may comprise a camera 310. The camera 310 may be configured to receive the identifier of the electronic label 320. The camera 310 may be configured to receive the identifier from at least one of a server 350, a control unit 330 and the electronic label 320. The camera 310 may be configured to determine the identifier of the electronic label 320.

[0089] The camera 310 may be arranged to capture at least one image of the electronic label 320. The camera may be configured to transmit the control signal 380, 381. The control signal 380,381 may comprise an identifier of the electronic label 320. The signal comprising the global identifier, and/or the local identifier may be at least part of the control signal 380, 381. In other words, the control signal 380, 381 may comprise at least one of the global identifier and the local identifier. The camera 310 may comprise a transceiver 315 for transmitting and/or receiving communication such as a command or the control signal 380, 381. The camera 310 may also comprise separate means for receiving and transmitting a signal. The transceiver 315 may be arranged to transmit and/or receive at least one of a radio signal, a wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth, BT, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, a Radio Frequency identification, RFID, signal, an optical signal, a sound signal or any signal suitable for communication.

[0090] The electronic label 320 may be arranged in the field of view of the camera 310. The electronic label 320 may be adapted to receive the control signal 380 and may be adapted to change its optical output in response to said control signal 380.

[0091] The electronic label 320 may be configured to change its optical output based on that the identifier comprised in the control signal matches an identifier of the electronic label 320. In other words, the electronic label 320 may be arranged to compare the identifier comprised in the control signal to the identifier of the electronic label 320. If the comparison shows a matching identifier of the electronic label 320 to the one comprised in the control signal the electronic label 320 may be configured to change the optical output of the electronic label 320.

[0092] The control signal 380,381 may comprise information on how to respond to the control signal 380,381. In other words, the control signal 380,381 may contain information on how to act in response to the control signal. By how to act it may be meant that a command on how to respond to the control signal may be provided by the control signal itself. The optical output of the electronic label 320 may be changed according to a command provided by the control signal 380,381. The electronic label 320 may emit a sound signal based on the control signal. The control signal 380,381 may comprise an updated information associated with a product type that may in turn be associated with the electronic label 320 such as price information for a product type and/or any information associated with the product type. The control signal 380,381 may also comprise a command to change color of the optical output of the electronic label 320 or other changes in optical output, such as for example a change in optical output indicating a product type is on sale or a change in optical output in order to draw attention to the electronic label 380,381.

[0093] The control signal 380,381 may comprise information on when to change the optical output of the electronic label 320, wherein the optical output may comprise information associated with the product type. The electronic label 320 may be configured to act in response to the received control signal 380, 381 by performing a predetermined action. Wherein the predetermined action may comprise at least one of flashing light in a predetermined pattern, change in color of the optical output into a predetermined color, emitting a sound signal and vibrate.

[0094] There may be a plurality of electronic labels 320 present. Hence, at least one electronic label 320 may be present. The at least one electronic label 320 may comprise an optical output device 340. The optical output device 340 may comprise at least one of a LED, a display and any other visual device.

[0095] As discussed above, the camera 310 may determine the identifier of the electronic label 320 wherein the identifier may be associated with an identity of the electronic label 320. Hence, the camera 310 may capture at least one image comprising the electronic label 320. The electronic label 320 may be configured to change its optical output in order for the camera 310 to determine the identifier of the electronic label 320 within the captured at least one image. In other words, the camera 310 may be configured to capture at least one image of the electronic label. The electronic label 320 may be configured to change its optical output. The change in optical output may for example be displaying a visual reference. The change in optical output may comprise a distinct temporal pattern of optical changes for each label. By detection of at least one of the change in optical output, the visual reference and the distinct temporal pattern of optical changes, the electronic label may be identified.

[0096] By a visual reference it may be meant that the display of the electronic label changes output into displaying information such as at least one of a QR code, a number, a message, a picture and the like that the camera may be able to detect.

[0097] By a distinct temporal pattern of optical changes, it may be meant that the optical changes are changing in a distinct way characteristic for a certain electronic label. Thus, the electronic label may be identified using the distinct temporal pattern of optical changes.

[0098] The camera may be configured to receive any one of a control signal and a triggering signal. The control signal received by the camera may comprise the triggering signal. The camera may be configured to start determining an identifier of the electronic label based on at least one of the control signal 380,381 and the triggering signal.

[0099] The triggering signal may be generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

[0100] The at least one electronic label 320 may be configured to present information associated with a product type, wherein output device 340 may comprise additional information associated with a product type, wherein the output device and the electronic label may comprise information associated with the same product type. Over time, pricing and/or other information relating to the product type may change and/or product types and/or product units may change place, this may result in incorrect information presented on the electronic label 320. Hence, the system 300 may need the information presented on the electronic label 320 to be updated.

[0101] The camera 310 may be configured to receive a triggering signal and wherein the camera 310 may be configured to start transmitting the control signal 380, 381 as a response to the triggering signal. In other words, there may be a triggering of the camera 310 to start transmitting the control signal. In other words, the camera 310 may be triggered to start transmitting the control signal. The electronic label 320 may be arranged to receive the control signal. The electronic label 320 may be arranged to change its optical output based on the received control signal 380, 381.

[0102] The triggering signal, i.e. the triggering may be generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

[0103] There may be a plurality of electronic labels 320 present. Hence, at least one electronic label 320 may be present. The at least one electronic label 320 may comprise an optical output device 340. The optical output device 340 may comprise at least one of a LED, a display and any other visual device. The at least one electronic label 320 may comprise a receiver 325. The receiver 325 may be arranged to receive at least one of a Radio Frequency, RF, signal, a wireless, WIFI, signal, an Infrared, IR, signal, a Bluetooth, BT, signal, a Near-Field communication, NFC, signal, a Radio Frequency identification, RFID, signal, an optical signal, a sound signal or any signal suitable for communication. The electronic label may also comprise a transmitter. The electronic label may comprise a transceiver arranged for both transmitting and receiving a signal. The transceiver may be arranged to receive the control signal. The transceiver and/or the transmitter may be arranged to transmit a signal. The signal transmitted by the transceiver and/or the transmitter may be transmitted by the transceiver and/or transmitter upon request.

[0104] The camera 310 may be configured to transmit a control signal 380,381 that may further comprise information associated with a request of data transfer from the electronic label 320 to the camera 310. In other words, the camera 310 may be configured to request and/or ask for data from the electronic label 320. Wherein the data may be associated with the electronic label 320 and/or information associated with a product type. The data may comprise at least one of battery level, information currently presented by the electronic label, general status of the electronic label and an identifier of the electronic label. Wherein the general status of the electronic label may in turn comprise possible errors in circuitry, errors in power supply and/or other errors significant for the performance of the electronic label 320.

[0105] The electronic label 320 may comprise a sensor. The sensor may comprise at least one of a temperature sensor, a motion sensor and accelerometer sensor. The electronic label 320 may comprise a storage device. As discussed, the camera may be configured to transmit a control signal, and the control signal may further comprise information associated with a request of data transfer from the electronic label to the camera. The electronic label 320 may further be configured to transmit the data that may comprise at least one of detected temperature, detected motion, detected acceleration of the electronic label, historical temperature data, historical detected motion data and historical detected acceleration of the electronic label.

[0106] The camera 310 may be configured to be working in a low power mode and a normal power mode. Wherein the low power mode is a mode consuming less power than the normal power mode by for example using less features of the camera. As a non-limiting example, the camera may cease capturing of images in the lower power mode or capture images with low capture frequency. The camera 310 may be configured to be working in the low power mode until at least one of the camera 310 and the electronic label 320 detects at least one of a motion, a vibration, the control signal, the triggering signal, a sound signal and a scheduled triggering. When at least one of the camera 310 and the electronic label 320 detects at least one of a motion, a vibration, the control signal, the triggering signal, a sound signal and a scheduled triggering, the camera may be configured to change into the normal power mode, wherein the normal power mode it may be meant that the camera start capturing images and/or captures images more frequent compared to the low power mode.

[0107] The system 300 may further comprise a control unit 330. The control unit 330 may be adapted to communicate with the camera 310 and configured to detect an identifier of the electronic label 320 by analyzing the optical output in the image and configured to determine a position of the electronic label 320 based on the position of the electronic label 320 in the image.

[0108] The control unit 330 may be arranged separately from the camera 310 or arranged within the camera 310. In other words, the camera 310 may comprise the control unit 330.

[0109] The control unit 330 may communicate with the camera by at least one of Radio Frequency, RF, signal, a wireless, WIFI, signal, an Infrared, IR, signal, a Bluetooth, BT, signal, a Near-Field communication, NFC, signal, a Radio Frequency identification, RFID, signal, an optical signal, a sound signal or any signal suitable for communication. The control unit 330 may comprise a transceiver 335. The control unit 330 may, by the transceiver 335, send a control signal 380, 381 arranged to be received by at least one of the server 350, the camera 310 and the electronic label 320, wherein the control signal 380, 381 may control at least one of the camera 310, the server 350 and the electronic label 320.

[0110] The system may further comprise a server 350 and a storage means 360. The server 350 may be communicatively connected to the storage means 360. The server 350 may further comprise a transceiver 355. The server 350 may, by the transceiver 355, send a control signal 380,381 arranged to be received by at least one of the camera 310, the control unit 330 and the electronic label 320, wherein the control signal 380, 381 may control at least one of the camera 310, the server 350 and the electronic label 320.

[0111] At least one of the camera 310, the server 350 and the control unit 330 may comprise information of the camera 310 and its associated electronic labels 320. By the camera 310 and its associated electronic labels it may be meant that the field of view of the camera 310 comprises electronic labels. In other words, electronic labels associated with the camera 310 may be comprised within the field of view of the camera 310.

[0112] The camera 310 may, by the transceiver 315, transmit a signal arranged to be received by the at least one of the control unit 330, the electronic label 320 and the server 350. The signal transmitted from the camera 310 may comprise at least one of a control signal, an image, a determined position, a determined identifier or any data relating to the electronic labels. The transceiver 315 may have a limited range and the at least one electronic label 320 arranged within the limited range may receive the control signal. Electronic labels being out of range may not receive the control signal and hence, may not change its optical output.

[0113] The camera 310 may transmit a control signal 380 directly to be received by the electronic label 320 and/or the camera 310 may transmit a control signal 380, 381 to be received by the electronic label 320 via at least one of the server 350 and the control unit 330.

[0114] As seen in FIG. 1a-1b, the electronic label 320 may change its optical output. The electronic label in FIG. 1a may receive the control signal 380,381 and based on that the identifier comprised in the control signal matches an identifier of the electronic label 320 the optical output of the electronic label may change. The change in optical output may be a predetermined change in optical output and/or a change in optical output based on the control signal 380,381, wherein the control signal 380,381 may comprise information on how to change the optical output. In FIGS. 1a and 1b this is illustrated as the electronic label changing the optical output based on that the identifier comprised in the control signal 380,381 matches an identifier of the electronic label 320

[0115] The change in optical output may be initiated by the electronic label receiving the control signal 380. As previously discussed, the control signal 380 may be transmitted from the camera 310 as a response to the camera 310 receiving at least one of the control signal and the triggering signal. The control signal may comprise the triggering signal. At least one of the control signal and the triggering signal may be generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

[0116] The camera may comprise sensor for detecting at least one of motion, sound and vibration, in other words, the camera may comprise at least one of a motion sensor, a sound sensor, a vibration sensor. The motion sensor may be an infrared sensor. The sound sensor and/or the vibration sensor may comprise at least one of a microphone, an accelerometer, or any other device suitable to detect sound and/or vibration. The motion sensor may be a passive infrared sensor (PIR sensor).

[0117] By a motion detected by the camera it may be meant that movement may be detected by detecting changes in images and/or that motion may be detected by the motion sensor. In other words, the control signal and/or the triggering signal may be generated as a response to motion detected by the camera by analyzing images and/or as a response to the motion sensor detecting motion. This may be indicative of someone moving in the field of view of the camera and/or in the field of view of the motion sensor.

[0118] The control signal and/or triggering signal transmitted as response to the motion, vibration and/or sound detected by the camera may be received by the electronic label. The electronic label may be controlled to change its optical output in response to the received control signal and/or triggering signal, wherein the change in optical output may be at least one of change in information presented by a display device and a flashing light from the light source, wherein the light source may be as earlier explained a light emitting device, LED, a display device and/or any other device suitable to produce a visual output. The electronic label may be controlled to produce sound in response to the received control signal and/or triggering signal.

[0119] The change in optical output of the at least one electronic label 320 may comprise displaying a visual reference, such as at least one of a barcode, a QRcode, a number, a letter and the combination thereof. The change in optical output may comprise changing the color output of the electronic label 320.

[0120] The camera 310 may be comprised in a mobile device. By a mobile device may here be meant a device being mobile and could comprise at least one of a movable robot, a drone, part of a robot such as a moving arm of a stationary or movable robot, cellular device, smart phone, pad, tablet, computer, portable computer and any device suitable to carry a camera and being mobile and/or movable. The drone may be a flying drone configured to be autonomously controlled and/or user controlled.

[0121] In the system 300 illustrated in FIG. 1a, at least one of the camera 310, the server 350 and the control unit 330 may transmit a control signal 380, 381. At least one of the camera 310, the server 350 and the control unit 330 may broadcast the control signal 380, 381. The control signal 380, 381 may subsequently be received by the electronic label 320. The control signal 380,381 that may be transmitted from anyone of the server 350 and the control unit 330 may be received by the camera 310. The camera 310 may in turn transmit the control signal 380. The control signal 380 may be received by the receiver 325.

[0122] FIG. 1b illustrates a change in optical output of the electronic label 320. The electronic label 320 may be controlled to change its optical output based on the control signal 380. The change in optical output may be achieved by the optical output device 340 changing its optical output. The control signal 380, 381 may comprise information, wherein at least part of the information may be associated with a change in optical output of the electronic label 320 and wherein the change in optical output by the electronic label 320 may be based on the information.

[0123] The information may comprise at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image. In other words, the electronic label may be configured to change its optical output wherein the change in optical output may comprise at least one of a product name, a price information, information for staff, information to alert staff, inventory information, alternating light output, color change, display of an image.

[0124] The camera 310 may be configured to capture at least one image in order to verify the change in optical output. By comparing the optical output in the captured at least one image to a predetermined data the optical output may be verified. The predetermined data may comprise at least one of an image and information of expected image data. Wherein information of expected image data may comprise a color, a hash code, a QR code or any information suitable to verify the contents of the captured at least one image. FIG. 2 schematically illustrates the system 300 similar to that of the system 300 in FIG. 1a-1b, except that in FIG. 2 a plurality of electronic labels 320a-320g are arranged within the field of view of the camera 310. Same features discussed to the electronic label 320 in FIG. 1a-1b applies to the plurality of electronic labels 320a-320g in FIG. 2. The control unit 330 and the server 350 illustrated in FIG. 2 has the similar functionality as the control unit 330 and server 350 in FIG. 1a-1b.

[0125] The electronic labels 320a-320g in FIG. 2 are positioned in shelfs 385a, 385b. The electronic labels may be arranged in any type of fixture for holding products such as shelves, racks or other displays. FIG. 2 further illustrates at least one electronic label 321 arranged outside the field of view of the camera 310. The electronic labels 320a-320g may be have their optical output changed. The electronic labels 320a-320g in FIG. 2 may have received the control signal prior changing their optical output. The control signal 380 may have been transmitted, as previously disclosed to FIGS. 1a-1b, from either the camera 310, the server 350 or the control unit 330. The control signal 381 transmitted from at least one of the server 350 and the control unit 330 may be received by the camera 310 and the camera 310 may transmit the control signal 380 upon reception of said control signal 381. The control signal 380 may be received by at least one of the electronic labels 320a-320g.

[0126] The optical output of each electronic label 320a-320g may be changed by changing the optical output of the respective optical output device 340a-340g.

[0127] As previously discussed, the camera 310 may be configured to determine the identifier of the electronic label 320 and/or the camera may be configured to receive the identifier from the server 350, i.e. the server 350 may transmit the identifier of at least one of the electronic labels 320a-320g. The server 350 may comprise information of the electronic labels 320a-320g arranged in the field of view of the camera 310. The system 300 may comprise at least one camera 310. Hence, the server 350 may further facilitate coordination of the at least one camera 310 and the change in optical output and/or update of the plurality of electronic labels 320a-320g within the retail environment. In other words, this may further facilitate updating the electronic label coordinating the at least one camera 310.

[0128] Additionally, the camera 310 may determine the position of at least one of the electronic labels 320a-320g. The camera 310 may also be configured to receive the position of each electronic label 320a-320g from the server 350, i.e. the server 350 may transmit the position of at least one of the electronic labels 320a-320g. The camera 310 may be configured to verify the optical output of at least one of the electronic labels 320a-320g. The camera 310 may be configured to transmit the captured at least one image. At least one of the server 350 and the control unit 330 may be arranged to receive the at least one image. At least one of the camera 310, the server 350 and the control unit 330 may have at least one of the position and identity of the electronic labels 320a-320g, wherein the electronic labels 320a-320g are arranged in the field of view of the camera 310. Analogously, the system 300 may comprise more than one camera 310, each camera 310 being associated with at least one electronic label 320a-320g. By being associated with at least one electronic label 320a-320g it may be meant that the at least one electronic label 320a-320g may be arranged in the field of view of the camera 310. Hence, at least one of the server 350, the control unit 330 and the camera 310 may be configured to verify the optical output of at least one electronic label 320a-320g.

[0129] The system 300 according to another embodiment will be described with reference to FIG. 3. The system 300 may be similarly configured as the system 300 described with reference to FIG. 2, but FIG. 3 is relating to how the control signal 380 may be directed to the at least one electronic label 320.

[0130] FIG. 3 schematically illustrates a perspective view of the system 300 according to an embodiment. FIG. 3 illustrates a camera 310 and an electronic label 320 arranged within the field of view of the camera 310. The transceiver 315 may comprise an optical transmitter 317, the optical transmitter may comprise a LED, the LED may be arranged to emit at least one of visible light, UV-light or IR-light.

[0131] The camera 310 may transmit the control signal using at least one of the transceiver 315 and the optical transmitter 317. As previously discussed, the transceiver 315 may have a limited range and only the at least one electronic label 320 arranged within the limited range may receive the control signal. Electronic labels being out of range may not receive the control signal and hence, may not have its optical output changed.

[0132] Analogously, the optical transmitter 317 may have a limited range. The control signal transmitted from the optical transmitter 317 may be directed. By directed may it may be meant that the control signal may have a direction. The control signal 380 may be aimed toward the electronic label 320 such the control signal 380 reaches an area 395 comprising the electronic label 320, wherein the area 395 may be a projected area of the control signal 380 in a plane comprising at least one electronic label 320. This may further facilitate limiting the electronic labels 320 to be controlled to have their optical output changed. In other words, the optical transmitter 317 may be directed to the area 395, wherein electronic labels 320 within the area 395 may be controlled to have their optical output changed. More specifically, the optical transmitter 317 may be pointing in a direction creating a cone of illuminance transmitted from the optical transmitter, wherein electronic labels 320 arranged within that cone of illuminance may be controlled to have their optical output changed.

[0133] This is illustrated in FIG. 3, the optical transmitter 317 is transmitting an optical signal, wherein the optical signal may comprise the control signal 380. The optical signal may comprise electromagnetic radiation in wavelengths corresponding to wavelengths for at least one of UV, visible or IR radiation. The optical signal may have a limited range in the direction of the light propagation. The optical signal may have a limited area and/or volume being illuminated, as previously described. This may result in a projected area of illuminance in a plane comprising the at least one electronic label 320. In FIG. 3 this plane may be the shelf and/or shelves comprising the at least one electronic label 320. Objects arranged outside this projected area of illuminance, such as the electronic label 321 will not receive the transmitted optical signal. Hence, the electronic label 321 will not be controlled to have its optical output changed. The optical transmitter 317 may be configured so that the electronic labels 320 within the field of view of the camera 310 is being illuminated by the optical transmitter 317. The optical transmitter 317 and the camera 310 may be arranged so that the camera 310 captures at least one image of a portion of the at least one electronic label 320 illuminated by the optical transmitter. This is schematically illustrated in FIG. 3, as the cone of illuminance form the optical transmitter is larger than the area imaged by the camera 310 in a plane comprising the electronic labels 320.

[0134] The cone of illuminance from the optical transmitter may further facilitate directing the control signal and hence this may further facilitate limiting the number of electronic labels receiving the control signal. In turn, this may further facilitate saving power while positioning and identifying the electronic labels.

[0135] The optical transmitter 317 in FIG. 3 is arranged on the camera 310. However, the optical transmitter 317 is not limited to be arranged on the camera 310, but can also be arranged as a separate unit next to the camera 310 or on anyone of the server 350 and the control unit 330 and may be controlled by the camera through a control signal 381. The camera 310 may transmit a control signal 380 directly to be received by the electronic label 320 and/or the camera 310 may transmit a control signal 380, 381 to the electronic label 320 via at least one of the server 350 and the control unit 330.

[0136] As illustrated in FIG. 3, the optical transmitter transmits a signal, wherein the signal comprises the control signal. However, the idea of limiting the number of electronic labels 320 to be controlled to have their optical output changed as illustrated in FIG. 3, is not limited to an optical signal. The signal that may comprise the control signal could be any signal with limitation in range and/or direction know in the art of communication.

[0137] A method 100 for controlling an optical output of at least one electronic label in a retail environment according to an embodiment will now be described with reference to FIG. 4. For clarity and simplicity, the method will be described in terms of ‘steps’. It is emphasized that steps are not necessarily processes that are delimited in time or separate from each other, and more than one ‘step’ may be performed at the same time in a parallel fashion.

[0138] The method 100 for controlling an optical output of at least one electronic label in a retail environment is provided, wherein the electronic label may comprise a receiver for receiving a control signal and may be adapted to change its optical output in response to the control signal, the electronic label may be arranged within the field of view of a camera comprising a transmitter for transmitting a control signal.

[0139] The method may comprise the steps of receiving 120, by the camera, an identifier of the electronic label and transmitting 130, by the camera, a control signal comprising the identifier. The method may further comprise receiving 140, by the electronic label, the control signal comprising the identifier and changing 150 the optical output of the electronic label based on that the identifier comprised in the control signal matches an identifier of the electronic label.

[0140] By changing 150 the optical output it may be meant that a visual output of the electronic label is changed, such as a change in output of light intensity from the electronic label, change in color output from the electronic label and/or change in displayed information on the electronic label.

[0141] Hence, the electronic label comprising the identifier matching the identifier of the one in the control signal may change its optical output. In other words, electronic labels comprising the identifier not matching the identifier of the one in the control signal may not change its optical output.

[0142] The step of transmitting 130 by the camera, a control signal comprising the identifier may comprise at least one of transmitting and broadcasting by the camera a control signal comprising the identifier to electronic labels within the field of view of the camera.

[0143] By broadcasting may be meant that the camera may transmit the control signal without prior knowledge of at least one of the identity and the position of the at least one electronic label.

[0144] The method may also comprise determining 110 an identifier of the electronic label using the camera.

[0145] By using the camera, it is meant that the camera is used to receive the identifier. This may be done by capturing at least one image comprising the electronic label using the camera. The at least one image may be analyzed to determine the identifier of the electronic label from the image. I.e. the optical output may be analyzed in the at least one image. By the optical output may be analyzing in the at least one image it may be meant that the at least one image may be analyzed for changes in optical output from the electronic label. The identifier may be determined by a characteristic change in optical output from the electronic label, wherein the characteristic change in optical output is associated with the identifier of the electronic label and hence the change in optical output may be significant for a specific electronic label. In other words, the image may be analyzed for detecting the change or changes in optical output in order to detect the identifier of each of the at least one electronic label. The change in optical output it may be meant that a visual output is changed, such as a change in output of light intensity from the electronic label, change in color output from the electronic label and/or change in displayed information on the electronic label.

[0146] Hence, the step of determining 110 an identifier of the electronic label may comprise transmitting 200 a control signal from the camera to the electronic label and controlling 210 the electronic label to change its optical output based on the control signal. The step of determining 110 may further comprise capturing 220 a plurality of images containing the electronic label and determining 230 an identifier of the electronic label by analyzing the optical changes in the images.

[0147] The change in optical output may comprise a distinct pattern of optical changes.

[0148] wherein the control signal further comprises information associated with a change in optical output of the electronic label and wherein the change in optical output by the electronic label is based on the information. Wherein the information may comprise at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image.

[0149] The method may further comprise verifying 160 the change in optical output using the camera.

[0150] By verifying the change in optical output using the camera it may be meant that the camera may capture at least one image and by analyzing the at least one image the optical output may be verified by comparing the optical output to a predetermined optical output. In other words, an image may be captured and the captured image may be compared to expected image data or similar data associated with an expected change of optical output. By data associated with an expected change of optical output it may be meant that the data comprises information on expected change of optical output from the electronic label. The optical output may comprise a text, a hash code, an QR code and/or an image and hence verifying the change in optical output may comprise analyzing the text, the hash code, the QR code and/or the image of the electronic label in the captured image. The electronic label may change its optical output in a predetermined way verifying that the optical output of the electronic label is changed based on the received control signal. The optical output may comprise a change of light intensity and/or color and the verifying the change in optical output may comprise analyzing the change of light intensity and/or color of the optical output of the electronic label in the captured image. The change in light intensity and/or color may comprise a distinct temporal pattern of optical changes. In other words, the change of light intensity and/or color of the electronic label may comprise a characteristic change of optical output significant for a specific electronic label.

[0151] The method may also comprise the steps of receiving 170, by the camera, a triggering signal and triggering 180 the camera to start determining an identifier of the electronic label based on the triggering signal.

[0152] The control signal may be transmitted to electronic labels arranged in the field of view of the camera. In other words, the control signal may be transmitted such that electronic labels arranged in the field of view of the camera may receive the control signal. In other words, the control signal may be transmitted and electronic labels arranged in the field of view of the camera may receive the control signal. Even though, the electronic labels arranged in the field of view of the camera may be the main target for the control signal, electronic labels arranged outside the field of view of the camera may also receive the control signal. Hence, the control signal may be transmitted so that electronic labels arranged outside the field of view of the camera may receive the control signal.

As previously discussed the control signal may comprise the identifier of the electronic label arranged in the field of view of the camera, in this way electronic labels arranges outside the field of view may not be triggered to change its optical output even though they may receive the control signal. In other words, electronic labels arranged outside the field of view may not change its optical output as a response to receiving the control signal. This may provide for facilitated control of optical output of the electronic labels. The camera may receive the identifier from a server. The identifier may comprise a predetermined unique identifier and/or a shortened unique identifier.

[0153] To limit the number of electronic labels reached by the control signal the control signal may have a limited range and/or direction. The range may be a predetermined range such that the electronic label arranged in the field of view of the camera is reached.

[0154] The control signal may be transmitted in a direction, and wherein the control signal is transmitted using at least one of a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal and a sound signal.

[0155] The control signal may comprise information associated with a change in optical output of the electronic label and wherein the change in optical output by the electronic label may be based on the information.

[0156] The information may comprise at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image.

[0157] The control signal may comprise information associated with a request of data transfer from the electronic label to the camera. Hence, data may be transferred from the electronic label to the camera upon request. The data may comprise at least one of battery level, information currently presented by the electronic label, general status of the electronic label, an identifier of the electronic label, temperature data, accelerometer data, motion detection data, historical temperature data, historical motion detection data and historical accelerometer data. Wherein the general status of the electronic label may in turn comprise possible errors in circuitry, errors in power supply and/or other errors significant for the performance of the electronic label.

[0158] The method may further comprise triggering 190 the camera to start transmitting the control signal, wherein the triggering signal may be generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

[0159] A user, such as staff, may manually update information presented on the electronic label by pressing a button on the camera. The information may also be updated by pressing a button on the electronic label. The information may be retrieved by the electronic label from the server upon request. The electronic label may transmit at least one of a control signal and a triggering signal to the camera as a response of the user pressing the button on the electronic label. The user may also use a mobile device to transmit the triggering signal to the camera in order to trigger the camera start transmitting the control signal. By a mobile device it may be meant a movable device. By a mobile device it may be meant a portable device. By a mobile device it may here be meant a device being mobile and/or movable and could comprise at least one of a movable robot, part of a robot such as a moving arm of a stationary or movable robot, a drone, cellular device, smart phone, pad, tablet, computer, portable computer and any device suitable to transmit a triggering signal and being mobile and/or movable. The drone may be a flying drone configured to be autonomously controlled and/or user controlled.

[0160] The triggering signal may be generated internally within the camera or externally and transmitted to the camera.

[0161] By the triggering signal being generated by motion detected by the camera it may be meant that the triggering signal is being generated as a response to the camera detecting motion. In other words, the camera may detect motion within the field of view of the camera. The camera may comprise a motion sensor, and by the triggering signal being generated by motion detected by the camera it may be meant that the triggering signal is being generated as a response to the motion sensor detecting motion. This may be indicative of someone moving in the field of view of the camera and/or in the field of view of the motion sensor. The motion sensor may be an infrared sensor. The motion sensor may be a passive infrared sensor (PIR sensor). The control signal may then be sent to the electronic label to change its optical output.

[0162] By the triggering signal being generated by at least one of a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal and a sound signal it may be meant that the camera may receive the at least one of a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal and a sound signal and the camera may be triggered to transmit the control signal as a response to the received signal.

[0163] The person skilled in the art realizes that the present invention by no means is limited to the embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, features from the embodiments described with reference to FIGS. 1, 2 and 3 may be combined. For example, there could be one or a plurality of electronic labels present. Even though the inventive concept is directed to control of the optical output of electronic labels being arranged within the field of view of the camera, the transmitted control signal may reach electronic labels arranged outside the field of view of the camera.

[0164] Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite article “a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

ITEMIZED LIST OF EXAMPLES

[0165] 1. A method (100) for controlling an optical output of at least one electronic label in a retail environment, wherein the electronic label comprises a receiver for receiving a control signal and is adapted to change its optical output in response to the control signal, the electronic label is arranged within the field of view of a camera comprising a transmitter for transmitting a control signal, the method comprising:

[0166] receiving (120), by the camera, an identifier of the electronic label;

[0167] transmitting (130), by the camera, a control signal comprising the identifier;

[0168] receiving (140), by the electronic label, the control signal comprising the identifier;

[0169] changing (150) the optical output of the electronic label based on that the identifier comprised in the control signal matches an identifier of the electronic label.

2. The method according to example 1,

[0170] wherein receiving (120), by the camera, an identifier of the electronic label comprises at least one of determining (110) an identifier of the electronic label using the camera and receiving, by the camera, the identifier from a server.

3. The method according to any one of the preceding examples, wherein the control signal is transmitted to electronic labels arranged in the field of view of the camera.
4. The method according to any one of the preceding examples, wherein the control signal is transmitted in a direction, and wherein the control signal is transmitted using at least one of a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal and a sound signal.
5. The method according to any one of example 1 and 2, wherein the method further comprises:

[0171] verifying (160) the change in optical output using the camera.

6. The method according to any one of the preceding examples, wherein the identifier comprises a predetermined unique identifier.
7. The method according to any one of the preceding examples, wherein the identifier comprises a shortened unique identifier.
8. The method according to any one of the preceding examples, wherein the control signal further comprises information associated with a change in optical output of the electronic label and wherein the change in optical output by the electronic label is based on the information.
9. The method according to example 8, wherein the information comprises at least one of a product name, a price information, information for staff, information to alert staff, inventory information, information to alternate light output, information to change color, information to display an image.
10. The method according to any one of the preceding examples, wherein the control signal further comprises information associated with a request of data transfer from the electronic label to the camera.
11. The method according to any one of the preceding examples, wherein the method further comprises:

[0172] receiving (170), by the camera, a triggering signal;

[0173] triggering (180) the camera to start determining an identifier of the electronic label based on the triggering signal.

12. The method according to any one of the preceding examples, wherein the method further comprises:

[0174] triggering (190) the camera to start transmitting the control signal; wherein the triggering signal is generated by at least one of a motion detected by the camera, a button pressed on the camera, a Wireless, Wifi, signal, an Infrared, IR, signal, a Bluetooth Low Energy, BLE, signal, a Near-Field communication, NFC, signal, a Radio Frequency, RF, signal, an optical signal, a sound signal, vibration and a scheduled triggering.

13. The method according to any one the preceding examples, wherein determining (110) an identifier of the electronic label comprises:

[0175] transmitting (200) a control signal from the camera to the electronic label;

[0176] controlling (210) the electronic label to change its optical output based on the control signal;

[0177] capturing (220) a plurality of images containing the electronic label;

[0178] determining (230) an identifier of the electronic label by analyzing the optical changes in the images.

14. A system (300) for controlling an optical output of at least one electronic label in a retail environment, wherein the system comprises;

[0179] a camera (310) comprising a transmitter for transmitting a control signal;

[0180] an electronic label (320) comprising a receiver (325) for receiving the control signal (380, 381) and wherein the electronic label is adapted to change its optical output in response to the control signal, the electronic label is arranged within the field of view of the camera;

[0181] wherein the camera is adapted to receive an identifier of the electronic label and transmit a control signal comprising the identifier and wherein the electronic label is adapted to receive the control signal comprising the identifier and change its optical output based on that the identifier comprised in the control signal matches an identifier of the electronic label.