A display panel includes a display substrate. The display substrate includes: a base substrate; a display structure layer including a plurality of pixel circuits and a plurality of light-emitting devices on the base substrate; and a light detection layer located at a non-light exit side of the light-emitting devices. A pixel circuit in the plurality of pixel circuits is electrically connected to a respective light-emitting device to drive the light-emitting device to emit light. The light detection layer is configured to detect a luminous intensity of at least one light-emitting device. The display substrate further includes: a transparent cover plate at a light exit side of the light-emitting devices; and a polarizer and a first quarter-wave plate between the display substrate and the transparent cover plate. The polarizer is closer to the display substrate than the first quarter-wave plate.

An image display device according to the present disclosure includes a first self-luminous display element that self-emits an image of first color light, a second self-luminous display element that self-emits an image of second color light, a third self-luminous display element that self-emits an image of third color light, and a prism including a dichroic mirror that synthesizes images of three colors, the first, the second, and the third self-luminous display element are each configured to extract light from a side of a semireflective semitransmissive electrode included in the first, the second, and the third self-luminous display element, and at least one of sums of a thickness of a transparent electrode and a thickness of an optical adjustment layer differs from other in the first, the second, and the third self-luminous display element.

The present invention relates to liquid crystalline (LC) medium, to a method of its production and to the use of such LC media in polymer network liquid crystalline (PNLC) light modulation elements operated in the normally transparent mode. Furthermore, the present invention relates to such light modulation elements, as such, to the use of such light modulation elements as light shutters for transparent OLED displays, to the use of such light modulation elements in smart windows, and to a method of production of such light modulation elements according to the present invention.

A display may have a backlight unit that provides backlight illumination. The backlight unit may include a light guide that distributes light throughout the display and an electrically adjustable lens array. The lens array may have lenses such as liquid lenses or liquid crystal lenses. By adjusting the lenses in the lens array, the angles of rays of backlight from the backlight unit may be adjusted to adjust the angle-of-view of the display. The angle-of-view of the display may also be adjusted using an electrically controllable filter layer. The electrically controllable filter layer may have a liquid crystal layer or a polymer dispersed liquid crystal layer that can be controlled using electrodes. When the electrodes apply signals to the electrically controllable filter layer, portions of the filter layer change to a dark or translucent state and restrict the angle-of-view of the display.

Provided is a transparent display apparatus including a lower panel on which a shutter region and a light emitting region are horizontally disposed, an upper panel including a recessed region configured to cover the shutter region and the light emitting region to face the lower panel, a light emitting device, and a shutter device. The shutter device includes a lower electrode and an electrochromic material layer that are sequentially laminated in the shutter region of the lower panel, an upper electrode disposed in the recessed region of the upper panel, and an electrolyte layer filled between the electrochromic material layer and the upper electrode.

An optical film, a polarizing plate, and an image display device, each having an optically anisotropic layer obtained by curing a polymerizable liquid crystal composition including a polymerizable liquid crystal compound (LCC) having forward wavelength dispersion and a monofunctional compound, and immobilizing an alignment state of the polymerizable LCC. The number a.sub.1 of atoms of the polymerizable LCC and the number a.sub.2 of atoms of the monofunctional compound satisfy a relationship of Expression (1): 0.2<a.sub.2/a.sub.1<0.55; the number b.sub.1 of the rings B.sup.1 contained in the polymerizable LCC and the total number b.sub.2 of the aromatic rings Ar and the rings B.sup.2 contained in the monofunctional compound satisfy a relationship of Expression (2): b.sub.2=b.sub.1×0.5 or b.sub.2=(b.sub.1+1)×0.5.

A display substrate, a method of forming a display substrate and a display device are provided. The display substrate includes: a plurality of pixel units arranged in an array, a substrate, a light-emitting device layer and an electrochromic functional layer, where the light-emitting device layer and the electrochromic functional layer are stacked on the substrate; the light-emitting device layer includes a plurality of light-emitting devices, an orthographic projection of the electrochromic functional device on the substrate is at least partially overlapped with an orthographic projection of the corresponding effective light-emitting area on the substrate.

An organic light emitting display device includes a plurality of pixels, each of the plurality of pixels including: a first sub-pixel configured to emit light of a first color; a second sub-pixel configured to emit light of a second color that is different from the first color; a third sub-pixel configured to emit light of a third color that is different from the first and second colors; and a transmission sub-pixel configured to selectively transmit external light in response to an electrical signal.

An organic light emitting diode (“OLED”) display device includes: a substrate; a reflective layer disposed on the substrate; a refractive index anisotropic layer disposed on the reflective layer; a first electrode disposed on the refractive index anisotropic layer; an organic light emitting layer disposed on the first electrode; and a second electrode disposed on the organic light emitting layer.

The present disclosure provides an OLED double-sided display panel, its manufacturing method and a display device. The OLED double-sided display panel includes a base substrate, a plurality of OLEDs formed on the base substrate, and a light control unit arranged at at least one side of the OLEDs. An orthogonal projection of the light control unit onto the base substrate covers an orthogonal projection of each OLED onto the base substrate, and the light control unit is capable of being switched between a transparent state and an opaque state.