An organic electroluminescent display substrate is provided, which includes a base substrate, and a light-emitting unit and a light-sensing unit arranged on the base substrate, wherein the light-sensing unit is arranged on a light-emitting side of the light-emitting unit, and configured for sensing an intensity of light emitted from the light-emitting unit; a first planarization layer is arranged between the light-sensing unit and the light-emitting unit; the light-sensing unit comprises a first thin film transistor and a photosensitive sensor arranged sequentially in that order in a direction away from the base substrate, and a second planarization layer is arranged between the photosensitive sensor and the first thin film transistor. A display panel, a display device and a method for manufacturing the organic electroluminescent display substrate are further provided.

A organic light-emitting element including a positive electrode, a light-emitting layer, and a negative electrode in this order, wherein the light-emitting layer contains a dopant material, a host material, and an assist material, the dopant material is a compound represented by the following general formula [1], the host material is a hydrocarbon compound, and the assist material has a lower LUMO level than the host material. In the formula [1], R.sub.1 to R.sub.10 denote a hydrogen atom, an alkyl group, or the like. X denotes O or S. m denotes an integer in the range of 1 to 3, and n denotes an integer in the range of 0 to 2, provided that m+n is 3. The partial structure IrL.sub.n is any one of structures represented by the following formulae [2] and [3], wherein R.sub.11 to R.sub.21 denote a hydrogen atom, an alkyl group, or the like.

##STR00001##

Provided are a display substrate and a manufacturing method thereof, and a visible light communication apparatus. The display substrate includes a substrate, and the substrate includes a display region and a peripheral region surrounding the display region; the peripheral region includes a visible light signal receiving region surrounding the display region; the display substrate further includes a photosensitive sensing unit, the photosensitive sensing unit is located in the visible light signal receiving region and is configured to receive a visible light signal and convert the visible light signal into an electrical signal to achieve visible light communication.

The resolution of a display apparatus having a light detection function is increased. A display apparatus includes a plurality of transistors and a light-emitting and light-receiving device in a subpixel. The light-emitting and light-receiving device has a function of emitting light of a first color and a function of receiving light of a second color. One of a source and a drain of a first transistor is electrically connected to a first wiring, and the other thereof is electrically connected to a gate of a second transistor. One electrode of the light-emitting and light-receiving device is electrically connected to one of a source and a drain of the second transistor, one of a source and a drain of a third transistor, and one of a source and a drain of a fifth transistor. One of a source and a drain of a fourth transistor is electrically connected to a second wiring, and the other thereof is electrically connected to the other of the source and the drain of the third transistor.

An organic light-emitting display device comprises a display panel having a transmission area through which external light passes, and a non-transmission area having transmittance lower than that of the transmission area; a data driver supplying a data signal to the display panel; a gate driver supplying a gate signal to the display panel; a timing controller controlling the data driver and the gate driver; and a sensor package module disposed on a rear surface of the display panel and disposed to correspond to the transmission area, wherein the number of conductive films stacked in the transmission area is smaller than that of conductive films stacked in the non-transmission area.

An optical system is described. The optical system may include a sensor which may be in a mobile device. The optical system may use the same light source for imaging the display and for providing light to a sensor or sensor device. The optical system may be configured so that randomly polarized light will exit the device for viewing so that a user may view the display in any rotated orientation while wearing polarized eyewear. The optical system may further be configured to mitigate reflections in the mobile device from ambient light entering the system and from reflected and backscattered light from cross-contaminating the imaging light of the display.

A touch display apparatus is provided. The touch display apparatus may include a light-emitting device and a touch sensor. The touch sensor may be disposed on an encapsulating unit covering the light-emitting device. A photo-electric device may be disposed between the encapsulating unit and the touch sensor. The photo-electric device may be disposed outside an emission area in which the light-emitting device is disposed. A light-absorbing layer of the photo-electric device may overlap at least one of touch electrodes and bridges of the touch sensor. Thus, the touch display apparatus may increase the time that the touch display apparatus is used without external power source connected by using the electrical energy generated by the photo-electric device.

A display screen and an electronic device. The display screen comprises a first display region and a second display region connected to each other. The pixel density of the first display region is less than the pixel density of the second display region. Each of minimum repeat regions in the first display region comprises at least two pixel units, and each of the two pixel units comprises multiple pixels having different light-emitting colors. Pixel units in the same minimum repeat region are all located in the same diagonal direction of the minimum repeat region.

A display panel and a display apparatus. The display panel includes a first display area including a light-transmitting display area. The display panel includes: a substrate; a pixel definition layer disposed on the substrate; a plurality of first spacers disposed on a side of the pixel definition layer facing away from the substrate, the first spacers being positioned in the first display area; a cover plate disposed on a side of the first spacers facing away from the substrate. The first display area includes at least two sub-areas sequentially arranged along a direction from center to edge. In one of the sub-areas on the substrate to an area of the one of sub-areas is different from another proportion of a total area of orthographic projections of first spacers in another one of the sub-areas to an area of the another one of the sub-areas.

A display panel and a display apparatus. The display panel includes a first display area including a light-transmitting display area. The display panel includes: a substrate; a pixel definition layer disposed on the substrate; a plurality of first spacers disposed on a side of the pixel definition layer facing away from the substrate, the first spacers being positioned in the first display area; a cover plate disposed on a side of the first spacers facing away from the substrate. The first display area includes at least two sub-areas sequentially arranged along a direction from center to edge. In one of the sub-areas on the substrate to an area of the one of sub-areas is different from another proportion of a total area of orthographic projections of first spacers in another one of the sub-areas to an area of the another one of the sub-areas.