According to one embodiment, a display device, including a first insulating, a first common electrode located on a side of the first insulating layer, a second common electrode being adjacent to the first common electrode, and a second insulating, wherein the first insulating layer is in contact with the second insulating layer at a position corresponding to the first boundary portion, the second common electrode is contact with any one of the first and second insulating layers at a position corresponding to the second boundary portion, and being in contact with both the first and second insulating layers at a position corresponding to the third boundary portion.

Power consumption of a display device is reduced. Display quality of a display device is improved. A high-quality image can be displayed regardless of a usage environment. The display device includes a first display element, a second display element, and a control portion. The first display device reflects visible light. The second display element emits visible light. The control portion is configured to drive the first display element and the second display element at the same time such that a maximum value of luminance of light emitted from the second display element is greater than or equal to 1% and less than or equal to 50% of maximum luminance on the assumption that maximum luminance of light which is emitted from the second display element is 100%.

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.

The present disclosure provides a display panel and a display device. The display panel comprises a first substrate, a liquid crystal layer, a second substrate and a polarizer which are stacked sequentially; a light reflection layer and a plurality of organic light-emitting units being provided on the first substrate, wherein the plurality of organic light-emitting units are located at a side of the light reflection layer close to the liquid crystal layer; the second substrate is configured to control deflections of liquid crystal molecules in the liquid crystal layer, and the second substrate comprises a plurality of sub-pixel regions. The display panel provided by the embodiment of the present disclosure achieves a transmission-type displaying in a case that the display signal is input to the first substrate, and achieves a reflection-type displaying in a case that the display signal is input to the second substrate.

A display device includes a first region and a second region adjacent to the first region. A display element included in the first region has a function of reflecting visible light and a function of emitting visible light. A display element included in the second region has a function of emitting visible light. In an electronic device including the display device, the first region is located on a first surface (e.g., top surface) on which a main image is displayed, and the second region is located on a second surface (e.g., side surface) on which an auxiliary image is displayed.

A reflectance-adjustable reflector including a phase modulation element and a first polarizer is provided. The phase modulation element includes a first substrate, a second substrate opposite to the first substrate, a phase modulation layer located between the first substrate and the second substrate, a first electrode layer located between the first substrate and the phase modulation layer, and a second electrode layer located between the second substrate and the phase modulation layer. Thicknesses of the first substrate and the second substrate are between 0.01 mm and 0.5 mm. The first polarizer is disposed on the first substrate. The first substrate is located between the first polarizer and the first electrode layer. A total thickness of the phase modulation element and the first polarizer is less than 1 mm. A reflectance-adjustable display device is also provided.

A display device that is suitable for high definition and a method for manufacturing thereof are provided. The display device includes a reflective liquid crystal element. A liquid crystal layer has a first portion overlapping with a reflective electrode that reflects visible light and blocks ultraviolet light, and a second portion overlapping with a region between two adjacent reflective electrodes. The first portion contains a monomer and liquid crystal and the second portion contains a polymer obtained by polymerization of the monomer. In the second portion, the polymer constitutes the framework of a columnar partition wall which bonds a pair of substrates to each other. The partition wall can be formed in a self-aligned manner by using the reflective electrode as a light-blocking mask at the irradiation with light. The polymer is positioned to fit a depression portion of an insulating layer over which the reflective electrode is provided.

It is an object of the present invention to provide a liquid crystal display device which has a wide viewing angle and less color-shift depending on an angle at which a display screen is seen and can display an image favorably recognized both outdoors in sunlight and dark indoors (or outdoors at night). The liquid crystal display device includes a first portion where display is performed by transmission of light and a second portion where display is performed by reflection of light. Further, a liquid crystal layer includes a liquid crystal molecule which rotates parallel to an electrode plane when a potential difference is generated between two electrodes of a liquid crystal element provided below the liquid crystal layer.

An optical device includes a first structure body with a first surface, a second structure body with a second surface facing the first surface, one or more optical guide regions positioned between the first surface of the first structure body and the second surface of the second structure body, the one or more optical guide regions including a liquid crystal material, and a first alignment film disposed on the first surface and aligning the liquid crystal material, the first alignment film being a rubbing alignment film, wherein the optical device further includes a second alignment film that is an optical alignment film formed by irradiation with polarized light.

An embodiment of the present invention discloses a reflective type display device, relating to the technical field of display. The liquid crystal display device is relatively thin and light, with low energy consumption. The reflective type display device comprises a polarizer, a transparent first substrate, a liquid crystal molecular layer and a second substrate arranged in sequence; wherein the reflective type display device further comprises: a selective reflecting layer located between the liquid crystal molecular layer and the second substrate; the selective reflecting layer reflects light with wavelength within a specific wavelength range.