The present invention relates to a lighting control device, the device comprising means for receiving a trigger; and means for switching operation of a lighting device from a continuous mode to a flash mode upon receipt of said trigger; wherein said lighting device comprises at least one light emitting diode; and said flash mode is at a higher brightness than said continuous mode. The invention also relates to a lighting system comprising: a lighting device comprising at least one light emitting diode; and a lighting control device; wherein the lighting control device is operable to switch operation of said lighting device between a continuous mode and a flash mode; wherein the flash is at a higher brightness than said continuous mode.

In an example, a method of operating an ultraviolet (UV) light source includes providing a supply power to the UV light source, and activating, using the supply power, the UV light source to emit UV light during a series of activation cycles. The method also includes, during at least one activation cycle in the series, sensing the UV light emitted by the UV light source to measure an optical parameter of the UV light. The optical parameter is related to an antimicrobial efficacy of the UV light. The method further includes adjusting, based on the measured optical parameter, an electrical parameter of the supply power to maintain a target antimicrobial efficacy of the UV light over the series of activation cycles.

In an example, a method of operating an ultraviolet (UV) light source includes providing a supply power to the UV light source, and activating, using the supply power, the UV light source to emit UV light during a series of activation cycles. The method also includes, during at least one activation cycle in the series, sensing the UV light emitted by the UV light source to measure an optical parameter of the UV light. The optical parameter is related to an antimicrobial efficacy of the UV light. The method further includes adjusting, based on the measured optical parameter, an electrical parameter of the supply power to maintain a target antimicrobial efficacy of the UV light over the series of activation cycles.

In an apparatus for thermal treatment of substrates, a gas discharge lamp runs in a simmer mode in standby operation. A constant power supply may be connected to the gas discharge lamp via a first switch. At least one charged capacitor may be connected to the gas discharge lamp via a second switch. A thermal treatment of the end side of a substrate with a duration of between 20 milliseconds and 500 milliseconds is provided in a manner governed by light absorption. This time window is advantageous for thermal treatment of coatings having a thickness of 2 to 200 micrometers, wherein the temperature of the rear side of the substrate can remain below that of the end side. The temperature on the end side can be significantly increased by the gas discharge lamp being connected to the capacitor via the second switch at the end of the time window.

In an apparatus for thermal treatment of substrates, a gas discharge lamp runs in a simmer mode in standby operation. A constant power supply may be connected to the gas discharge lamp via a first switch. At least one charged capacitor may be connected to the gas discharge lamp via a second switch. A thermal treatment of the end side of a substrate with a duration of between 20 milliseconds and 500 milliseconds is provided in a manner governed by light absorption. This time window is advantageous for thermal treatment of coatings having a thickness of 2 to 200 micrometers, wherein the temperature of the rear side of the substrate can remain below that of the end side. The temperature on the end side can be significantly increased by the gas discharge lamp being connected to the capacitor via the second switch at the end of the time window.

An extension photoflash light and a camera system using the same are provided in the present invention. The extension photoflash light is for assisting a mobile device with camera function. The extension photoflash light includes a HID, a mounting mechanism, a touch simulation device and a control circuit. The mounting mechanism is for mounting the extension photoflash light on the mobile device. The touch simulation device is disposed on the mounting mechanism. The control circuit is coupled to the HID and the touch simulation device. When the mounting device of the extension photoflash light contacts the surface of the flat panel display of the mobile device, the mobile device acquire the position information of the extension photoflash light according to the touch simulation device.

An LED driver for driving a plurality of series-coupled LEDs includes a bypass switch having first and second terminals coupled across a portion of the LEDs and a control terminal. A slew rate control circuit is responsive to a command input signal and to a feedback voltage associated with the bypass switch and is configured to generate a bypass switch control signal with a controllable slew rate. The slew rate control circuit is further configured to detect a rate of change of the switch feedback voltage and establish the bypass switch slew rate in response to the detected rate of change. Also described is method for controlling a bypass switch coupled across a portion of a plurality of series-coupled LEDs including detecting a rate of change of a voltage associated with the bypass switch and generating a control signal for the bypass switch in response to a command input signal and to the detected rate of change of the voltage.

A stroboscopic device includes a flash discharge tube, a first element for performing switching operation of flash discharge tube, a second element for performing ON control of the first element by an ON operation, and performing OFF control of the first element by an OFF operation, a third element for performing the OFF control of the first element by an ON operation, and performing the ON control of the first element by an OFF operation, and a first circuit for holding the ON operation of the third element for a predetermined period. The first circuit includes a fourth element for holding the ON control of the third element by the ON operation, and a second circuit capable of setting an operation period of an ON operation of the fourth element. This makes it possible to prevent false operation of the first element due to noise with a simple circuit configuration.

A stroboscopic device includes a flash discharge tube, a first element for performing switching operation of flash discharge tube, a second element for performing ON control of the first element by an ON operation, and performing OFF control of the first element by an OFF operation, a third element for performing the OFF control of the first element by an ON operation, and performing the ON control of the first element by an OFF operation, and a first circuit for holding the ON operation of the third element for a predetermined period. The first circuit includes a fourth element for holding the ON control of the third element by the ON operation, and a second circuit capable of setting an operation period of an ON operation of the fourth element. This makes it possible to prevent false operation of the first element due to noise with a simple circuit configuration.

Embodiments of this application provide an illuminator control method, an illuminator fitting, and an electronic device. The method may be applied to an electronic device, and the electronic device includes an image-shooting apparatus. The method includes: after obtaining an image-shooting start instruction, determining whether there is an available illuminator fitting, where the illuminator fitting includes an illuminator; and after determining that there is the available illuminator fitting, starting the image-shooting apparatus, and controlling to turn on the illuminator. This improves flexibility for controlling the illuminator.