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 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 display device and a method for fabrication thereof are provided. A display device includes a plurality of pixel electrodes spaced from each other on a substrate, a plurality of light emitting elements respectively located on the plurality of pixel electrodes, a common electrode layer on the plurality of light emitting elements, and an emission defining layer defining emission areas in which the plurality of light emitting elements are located, wherein the emission defining layer is in contact with a side surface of each of the plurality of light emitting elements and surrounds the side surface of each of the plurality of light emitting elements.

It is an object to provide a display device in which a problem of light leakage from a liquid crystal element in black display is reduced or overcome and the contrast is improved. It is another object to provide a pixel circuit having a function to control a lighting state of a backlight based on each pixel. These objects are achieved by turning off a light-emitting element in display of a black gray scale, and by providing a light-emitting element in each pixel and providing, in a pixel circuit, a function to individually control lighting and non-lighting of the light-emitting element depending on a gray scale to perform display. When a backlight is provided in each pixel, a light-emitting element that is a backlight is turned off when a black gray scale is displayed, whereby reduction in contrast due to light leakage from a liquid crystal element can be prevented.

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%.

To provide a display device in which a reflective liquid crystal element and a light-emitting element are switched for display, and the operation of a reflective liquid crystal element driver IC and the operation of a light-emitting element driver IC can be alternately stopped even when they are integrated. The display device includes a pixel, a driver circuit, and a switching control circuit. The driver IC includes a buffer amplifier for outputting a grayscale voltage to drive the liquid crystal element and a buffer amplifier for outputting a grayscale voltage to drive the light-emitting element. Each buffer amplifier includes a transistor configured to supply a bias current, and a switch. The switch is configured to control a conduction state between a wiring for supplying a bias voltage and a gate of the transistor. The switching control circuit is configured to output a switching signal for controlling a conduction state of the switch.

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.

An object is to provide a semiconductor device that automatically adjusts the luminance of a display device. The semiconductor device includes an illuminometer, a threshold detector, a timing controller, a digital-to-analog converter circuit, a first display panel, and a second display panel. The illuminance of external light is measured with the illuminometer, and the threshold value of digital video data is determined by the threshold detector in accordance with the illuminance. The timing controller generates a signal for the first display panel or a signal for the second display panel on the basis of the threshold value and video data transmitted from the outside. The signal for the first display panel and the signal for the second display panel are input to one digital-to-analog converter circuit and converted into digital signals, and the obtained digital signals are input to a corresponding one of the first display panel and the second display panel.

A sub-hogel configuration for a high-definition light field display that can be used in the design of optical device and three-dimensional light field display technology. Three-dimensional holographic pixels (hogels) composed of monochromatic sub-hogels and a designed metasurface act as a directional optical element for a light field display. The sub-hogel structure design and method is suited for an achromatic metasurface to provide directional pixels for multiple view light field colored displays.

A display device is provided. An input/output device is provided. A data processing device is provided. A display method is provided. The display device includes a display panel and a control portion. The control portion has a function of receiving image data and control data, a function of generating first data on the basis of the image data, a function of generating second data on the basis of the image data, a function of detecting a contour portion from the image data, a function of generating third data in which the contour portion is emphasized, and a function of supplying the first to third data. The display panel has a function of receiving the first to third data and includes a pixel. The pixel includes a first display element and a second display element. The first display element has a function of displaying an image on the basis of the first data, and the second display element has a function of displaying an image on the basis of the second or third data.