Disclosed is a method of controlling an electronic device. The method may include: acquiring a user's location with respect to the electronic device; and determining a display direction of a screen displayed on the electronic device based on the acquired user's location and displaying a first screen in the determined display direction.

An image display system includes a reflecting screen that has a reflecting surface. The reflecting surface includes hologram which reflects narrow bands of spectrum of incident lights toward desired direction. A projection display system includes a reflecting mirror(s) with hologram so that the image can be projected nearly vertical or short distance. This invention can be used as a head-up-display with improved brightness and eliminating ghost noise.

An electronic device and a control method of the electronic device. The control method comprises: determining a use state of an electronic device; when the electronic device is in a first use state, a laser projector projecting laser light in a first mode; and when the electronic device is in a second use state, the laser projector projecting laser light in a second mode, the energy of the laser light projected in the second mode is greater than the energy of the laser light projected in the first mode.

Systems and methods for projecting a color onto a surface are provided. The method includes selecting, using an application on a mobile electronic device, a color from a list of one or more colors, identifying a color of a surface onto which the selected color is to be projected, and determining, using a processor, a color of light to be projected onto the surface such that the color of light, in conjunction with the color of the surface, produces the selected color. The method further includes projecting, using a projector, the color of light onto the surface.

Provided are a portable security device having a rescue request function based on IoT which sprays tear gas to perform self-protection, automatically transmits a rescue request message and notifies a rescue requester of a response of a rescuer to the rescue request message to relieve the rescue requester, and a security system using the same.

An iPhone LED projector device that projects a large image from an iPhone onto a nearby wall or screen, where the LED projector is built into a housing for the iPhone, where the iPhone is attached via a lightning connector, where the LED projector device is about the same size as an iPhone and encloses the iPhone in a case, where the LED projector has a removable rechargeable lithium ion battery, an A/C power unit, wherein the LED projector includes external controls on one or more outer surfaces of the housing, wherien the LED projector is able to project an image approximately 100 in size diagonal dimension, and wherein the LED projector includes an audio Bluetooth connection for connecting to an external audio unit.

In accordance with disclosed embodiments, there is described a depth camera calibration system which includes: a depth camera to be calibrated; a calibration application to execute upon a mobile device, the calibration application to: (i) determine a precise image size of a calibration image to be displayed to a screen of the mobile device based on a screen size of the mobile device, the calibration image having embedded therein a plurality of objects of a known size, (ii) encode the known size of the objects into an optical machine-readable data representation, and (iii) display the encoded optical machine-readable data representation to the mobile device; in which the depth camera is to read the optical machine-readable data representation displayed by the mobile device to determine the known size of the objects of the calibration image; in which the calibration application is to display the calibration image to the mobile device; and in which an imager of the depth camera is to capture the objects of the coded image pattern and calibrate based on the known size of the objects of the captured calibration image. Other related embodiments are disclosed.

A multi-modal projection system, such as a smartphone, a wearable, or a generic universal-serial-bus-class (generic USB-class), for use in projecting device output via a host apparatus, such as a transportation vehicle. The system includes a hardware-based processing unit (processor), and a base data-processing resource needed by each of a plurality of interface components to generate the output to be projected via the host apparatus. The system includes a non-transitory computer-readable storage component having the interface components that, when executed by the processing unit, generate the output to be projected via the host apparatus. The storage component further includes a plurality of virtual data-processing components being virtual representations of the base data-processing resource. The storage component further includes a mapping module that, when executed, controls access for the interface components to the base data-processing component by way of the virtual data-processing components. Non-transitory computer-readable storage devices, methods performed by the structure described.

Provided are a portable security device having a rescue request function based on IoT which sprays tear gas to perform self-protection, automatically transmits a rescue request message and notifies a rescue requester of a response of a rescuer to the rescue request message to relieve the rescue requester, and a security system using the same.

A head mounted system can include a video camera that is configured to provide image data. A wireless interface circuit can be configured to receive augmentation data from a remote server. A processor circuit can be coupled to the video camera, where the processor circuit can be configured to register the image data with the augmentation data and combine the image data with the augmentation data to provide augmented image data. A projector circuit, coupled to the processor circuit, the projector circuit can be configured to project the augmented image data from the head mounted system onto a surface.