Video displayers are provided for detecting image freezing in a video displayer with a multi-layer panel including a front layer and a pixel layer emitting pixel light in emitting direction towards the front layer. Front layer and pixel layer are configured to let light through. Video displayers further include a light reflector arranged in the multi-layer panel between pixel layer and front layer to reflect the pixel light from pixel layer in reflection direction towards pixel layer; a light sensor arranged to receive the reflected pixel light at receiving location and sense light variations in received reflected pixel light; and a control unit to receive light variations sensed by light sensor and to detect image freezing depending on received sensed light variations. Methods and computer programs implementing such methods are also provided which are performable by proposed video displayers.

Disclosed are an image display device and a method of controlling an image display device. The image display device includes a motion detection unit for detecting a motion of a user and provides a welcome feedback to the user in the form of a visual signal, an audio signal, or both according to whether the motion of the user is detected or not, thereby drawing attention of the user or switching a display state to reduce power consumption of the image display device. The image display device determines a motion exception event that is not regarded a user motion on the basis of an overall change or a local change in pixel value between image frames, thereby preventing the display panel from being activated by a non-human-related factor such as a sudden change in illuminance or a movement of a periodically operating object.

An embodiment method of measuring ambient light comprises generating, by an ambient light sensor associated with a screen which alternates between first phases in which light is emitted and second phases in which no light is emitted by the screen, a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases; comparing the first signal with a threshold intensity value; and controlling a timing of an ambient light measurement by the light sensor based on the comparison.

The present disclosure discloses a structure for collecting light field information, a display device, and a control method of the display device. The structure for collecting light field information includes a base substrate, a plurality of sensor chips located on the base substrate, where each of the plurality of sensor chips includes a plurality of sensing units arranged in an array, and a plurality of micro-imaging structures located above a side, facing away from the base substrate, of the plurality of sensor chips. Each of the plurality of micro-imaging structures corresponds to a respective one of the sensor chips. An orthographic projection of the respective one sensor chip on the base substrate has an overlapping region with an orthographic projection of the each micro-imaging structure on the base substrate. The respective one sensor chip is configured to receive light field information passing through the each micro-imaging structure.

The present disclosure describes a method for displaying supplemental content. The method includes determining environmental characteristics, e.g., wall space, empty areas, colors, etc., for a display environment, determining supplemental content based in part on a primary content displayed by a primary display, and displaying the supplemental content in the display environment.

The present disclosure relates to display brightness control apparatuses and electronic devices. The display brightness control apparatus can be applied to a display panel. The display panel includes a thin film transistor unit and a light emitting unit. The display brightness control apparatus includes: a detector, which includes a plurality of thin-film transistors in the thin-film transistor unit and is used for outputting a detection current according to the brightness of ambient light; and a controller electrically connected to the detector and used for controlling the luminous brightness of the light-emitting unit according to the detection current. The detector is realized by means of the thin-film transistors, and is arranged inside the thin-film transistor unit of the display panel. The photosensitive characteristic of the thin-film transistors is used to detect the brightness of the ambient light.

Method and apparatus for selecting a gamma curve used by a display driver circuit for converting code words provided by a display processing unit to brightness levels based on an operating mode of the computing device. For example, the display processing unit provides code words to the display driver circuit for driving output at a display. Further, the display driver circuit converts the provided code words to analog signal for driving output at the display based on the selected gamma curve.

The present application relates to a display screen and a terminal. The display screen not only includes a light-emitting diode (LED) pixel units and a display driving circuit for driving the LED pixel units for display, but also includes light filtering units, light sensing units and a light sensing input circuit for transmitting a light sensing result of the light sensing units. In this way, the display screen can use the light sensing units to inductively convert light passing through the light filtering units into an electrical signal so as to collect an image, and further to achieve an effect of integrating an image display function and an image collection function. When the display screen is provided for a terminal, no separate camera module for image photographing needs to be arranged under the screen, such that a thickness and cost of the terminal can be greatly reduced, and portability and product competitiveness of the terminal can be improved.

A method for electrically controlling at least one functional element having electrically controllable optical properties, wherein the optical properties are controlled by a control unit, wherein the control unit is connected to at least two transparent flat electrodes of the functional element, and an electrical voltage is applied between the flat electrodes by the control unit, wherein the electrical voltage has a periodic signal profile with a first, variably adjustable frequency and the glazing unit is surrounded by light beams of a second frequency, and wherein the light beams are sensed by a sensor unit and the first frequency is changed as a function of the second frequency, wherein the first frequency is synchronized with the second frequency.

A system comprising a display and an ambient light sensing module, the ambient light sensing module being located beneath the display. The display comprises an array of light emitting diodes and a first polarizer located above the display. The sensing module comprises a first sensor and a second sensor, a second polarizer being located above the second sensor.