Provided is a flexible display screen, including: a flexible substrate provided with a foldable portion; pixel units disposed on a first surface of the flexible substrate; and a fold detection device including a reflective grating structure, an optical waveguide structure and a photoelectric sensor, wherein the optical waveguide structure and the reflective grating structure are sequentially laminated on the first surface of the flexible substrate and both disposed in the foldable portion, an orthographic projection of the optical waveguide structure onto the flexible substrate is overlapped with an orthographic projection of the reflective grating structure onto the flexible substrate, and the optical waveguide structure is connected to the photoelectric sensor.

The present disclosure provides a compensation apparatus and method of a light-emitting device and display substrate and fabrication method thereof. The apparatus of light-emitting device includes a light sensing circuit and a compensation amount computing circuit. The light sensing circuit is configured to output a first photo-generated current under a condition that the light-emitting device emits light, when the light-emitting device needs to be compensated. The compensation amount computing circuit is connected with the light sensing circuit, and configured to compute a compensation amount required to compensate the light-emitting device according to the first photo-generated current.

A display substrate and a display panel are provided. The display substrate includes a base substrate, and the base substrate includes a display region, a sensing region, and a dummy region; a plurality of sensing pixel units including a first light emitting element and a first pixel circuit are provided in the sensing region, and the first pixel circuit controls a voltage sensor to sense a voltage at a first terminal of the first light emitting element; a plurality of display pixel units including a second pixel circuit and a second light emitting element are provided in the display region; a plurality of dummy pixel units including a third pixel circuit and a third light emitting element are provided in the dummy region; and the first light emitting element, the second light emitting element, and the third light emitting element are all connected to a common voltage terminal.

A display device includes a base; a light emitting element on the base; a capping layer on the light emitting element; a thin-film encapsulation layer including a first inorganic layer on the capping layer, an organic layer on the first inorganic layer, and a second inorganic layer on the organic layer; and a wavelength conversion pattern on the thin-film encapsulation layer and overlapping the light emitting element, wherein the first inorganic layer includes two sub-inorganic layers having different refractive indices.

In some example embodiments, a back side illumination (BSI) image sensor may include a pixel configured to generate electrical signals in response to light incident on a back side of a substrate. In some example embodiments, the pixel includes, a photodiode, a device isolation film adjacent to the photodiode, a dark current suppression layer above the photodiode, a light shield grid above the photodiode and including an opening area of 1 to 15% of an area of the pixel, a light shielding filter layer above the light shield grid, a planarization layer above the light shielding filter layer, a lens above the planarization layer, and/or an anti-reflective film between the photodiode and the lens.

There is provided a display unit that is able to provide an indoor environment comfortable to a user. This display unit includes a frame member and a flexible display. The frame member is disposed, in a structure including a daylighting section that lets light through, around the daylighting section and includes a winder including a rotary shaft. The flexible display includes a dimming layer and a display device layer including a light-emitting layer disposed on the dimming layer, and is windable with rotation of the rotary shaft provided in the winder of the frame member and drawable from the winder.

A display panel includes: a substrate, a pixel layer and a sensing layer. The pixel layer is disposed on the substrate. The pixel layer includes pixel units arranged in an array. The sensing layer is disposed on one side of the substrate away from the pixel layer or disposed on one side of the substrate close to the pixel layer and is configured to convert a received optical signal into an electrical signal.

The present disclosure is related to a light emitting diode. The light emitting diode includes a first transparent electrode layer; a light emitting layer on the first transparent electrode layer; a reflective electrode layer on a surface of the light emitting layer opposite from the first transparent electrode layer, and a second transparent electrode layer. The reflective electrode layer may include transmission hole. The second transparent electrode layer may cover or fill the transmission hole. The transmission hole may be configured to transmit light emitted from the light emitting layer to pass through the second transparent electrode layer.

A display panel includes: a base layer including an emission area and a sensor area; a pixel circuit disposed on the emission area of the base layer; illuminance sensors disposed on the sensor area of the base layer, each of the illuminance sensors including a light receiving element overlapping the sensor area, the light receiving element disposed to be adjacent to the pixel circuit; light emitting elements disposed on the pixel circuit, each of the light emitting elements including a light emitting layer overlapping the emission area; a black matrix including openings overlapping the light emitting layer; and a color filter disposed on the light emitting elements and the black matrix.

A display device, a method for automatically adjusting brightness of a display screen and a terminal equipment are provided. An ambient light detection device is integrated in an operable region of the display device. The ambient light detection device includes a light blocking layer and a photoelectric sensor. The display device includes a display assembly and a control device. The display assembly includes a backpanel assembly, the light blocking layer being arranged in the backpanel assembly and provided with a light passing hole suitable for the passing of ambient light, the photoelectric sensor being disposed under the backpanel assembly; a display screen disposed over the backpanel assembly; a display chip connected to the display screen; and a control device connected to the photoelectric sensor. The display chip is connected to the control device, to adjust brightness of the display screen according to variance of the ambient light.