Disclosed herein are light emitting device that emit highly circularly polarized light. These devices may be used to form a dot-matrix display or an electronic information display comprised of a series of photopolymerizable, chiral liquid crystalline layers that can be solvent cast on a substrate. The mixture of chiral materials in each successive layer may be blended in such a way that each layer has the same chiral pitch and may also be blended so that the ordinary and extraordinary refractive indices in each layer match the other layers such that the complete assembly of layers will optically function as a single relatively thick layer or chiral liquid crystal. The chiral nematic material in each layer can spontaneously adopt a helical structure with a helical pitch. Further disclosed are pixel structures that not only emit light with brightness and chromaticity information, but also depth of focus information as well.

To provide a display device with high visibility or low power consumption. The display device includes a self-luminous display element and a reflective display element. The reflective display element includes a light-reflective layer and a layer containing a liquid crystal material. The self-luminous display element transmits visible light. The layer containing the liquid crystal material includes a region located between the light-reflective layer and the self-luminous display element. The display device further includes a polarizing plate, and the polarizing plate preferably includes a region located between the layer containing the liquid crystal material and the self-luminous display element. Alternatively, the self-luminous display element preferably includes a region located between the layer containing the liquid crystal material and the polarizing plate. The display device further preferably includes one coloring film or two or more coloring films, and the one coloring film or one of the two or more coloring films preferably includes at least a region located between the layer containing the liquid crystal material and the self-luminous display element.

A highly reliable display device is provided. In a flexible display device including at least a first display region and a second display region, at least a portion of a wiring provided in the first display region or the second display region has a meandering shape or a chain-like shape. Since the wiring has a meandering shape or a chain-like shape, a short-circuit, a disconnection, or the like of the wiring due to curving or bending of the display device does not occur easily. The wiring having a meandering shape or a chain-like shape can prevent defective operation, lowered reliability, or the like of the display device.

An electronic device including a panel and a light control unit is provided. The panel includes a first light-emitting region and a transparent region disposed adjacent to the first light-emitting region. The light control unit is disposed on the panel, wherein the light control unit is overlapped with the first light-emitting region.

An electronic device including a panel and a light control unit is provided. The panel includes a first light-emitting region and a transparent region disposed adjacent to the first light-emitting region. The light control unit is disposed on the panel, wherein the light control unit is overlapped with the first light-emitting region.

A viewing angle adjustment device and a display device including the same are discussed. The viewing angle adjustment device can include a first protective layer, a second protective layer disposed on the first protective layer, a light conversion layer disposed between the first protective layer and the second protective layer and including dispersion liquid having dispersed floating particles, and an auxiliary light conversion layer disposed on the second protective layer. The auxiliary light conversion layer can include first patterns where a light absorbing layer and a transparent layer are disposed in a center area, and second patterns where the light absorption layer, the transparent layer and a reflective layer are disposed in an edge area.

A viewing angle adjustment device and a display device including the same are discussed. The viewing angle adjustment device can include a first protective layer, a second protective layer disposed on the first protective layer, a light conversion layer disposed between the first protective layer and the second protective layer and including dispersion liquid having dispersed floating particles, and an auxiliary light conversion layer disposed on the second protective layer. The auxiliary light conversion layer can include first patterns where a light absorbing layer and a transparent layer are disposed in a center area, and second patterns where the light absorption layer, the transparent layer and a reflective layer are disposed in an edge area.

Embodiments of the disclosure provide a display panel and a display device. The display panel includes a substrate, a plurality of light emitting elements and at least one transmissive-reflective module, where the light emitting elements are arranged on the substrate; each of the light emitting elements includes a first electrode, a light emitting functional layer and a second electrode arranged along a direction vertical to the substrate and away from the substrate; the at least one transmissive-reflective module is arranged on a side, close to the substrate, of the first electrode of at least one of the light emitting elements, and/or on a side, away from the substrate, of the second electrode of at least one of the light emitting elements; the transmissive-reflective module is configured to switch between a transmissive state and a reflective state.

Embodiments of the disclosure provide a display panel and a display device. The display panel includes a substrate, a plurality of light emitting elements and at least one transmissive-reflective module, where the light emitting elements are arranged on the substrate; each of the light emitting elements includes a first electrode, a light emitting functional layer and a second electrode arranged along a direction vertical to the substrate and away from the substrate; the at least one transmissive-reflective module is arranged on a side, close to the substrate, of the first electrode of at least one of the light emitting elements, and/or on a side, away from the substrate, of the second electrode of at least one of the light emitting elements; the transmissive-reflective module is configured to switch between a transmissive state and a reflective state.

A semiconductor device with low power consumption is provided. The semiconductor device includes a controller, a register, and an image processing portion. The image processing portion is configured to process an image data using a parameter. The image processing portion receives an image data from a frame memory and receives a parameter from the register. The frame memory is configured to retain the image data while power supply is stopped. The register is configured to retain the parameter while the power supply is stopped. The controller is configured to control power supply to the register, power supply to the frame memory, and power supply to the image processing portion. The register includes a scan chain register. A transistor with which the scan chain register is configured includes an oxide semiconductor in a channel formation region.