An object is to reduce parasitic capacitance of a signal line included in a liquid crystal display device. A transistor including an oxide semiconductor layer is used as a transistor provided in each pixel. Note that the oxide semiconductor layer is an oxide semiconductor layer which is highly purified by thoroughly removing impurities (hydrogen, water, or the like) which become electron suppliers (donors). Thus, the amount of leakage current (off-state current) can be reduced when the transistor is off. Therefore, a voltage applied to a liquid crystal element can be held without providing a capacitor in each pixel. In addition, a capacitor wiring extending to a pixel portion of the liquid crystal display device can be eliminated. Therefore, parasitic capacitance in a region where the signal line and the capacitor wiring intersect with each other can be eliminated.

A driving method of scan lines in a display panel and a driving device thereof are described. The driving method of scan lines includes the steps of dividing a plurality of frames into a first frame set and a second frame set, and turning on the scan lines of each frame in the first frame set by using a forward scan direction and turning on the scan lines in the second frame set by a backward scan direction.

During a drive period, luminance momentarily decreases when the value (AB) is positive and momentarily increases when the value (AB) is negative. When the luminance increases during a pause period in accordance with the balance in time constant between an alignment film and a liquid crystal material that are included in a pixel forming portion, primary and secondary parasitic capacitances are adjusted so as to set the value (AB) to be negative.

According to one embodiment, a liquid crystal display apparatus includes an image sensor configured to output an image signal when the image sensor is driven in a first mode and a second mode, and a display device configured to display an image on a display panel based on the image signal. The image sensor is configured to output an image signal every first exposure time when the image sensor is driven in the first mode, and to output an image signal every second exposure time when the image sensor is driven in the second mode. The display device is configured to display an image in accordance with progressive drive when the image sensor is driven in the first mode, and to display an image in accordance with interlace drive when the image sensor is driven in the second mode.

A cholesteric liquid crystal writing board, which can display a writing track, includes a cholesteric liquid crystal device, an optical layer, a photo-sensing array and a voltage control circuit. The cholesteric liquid crystal device includes plural liquid crystal control areas. The optical layer has plural optical openings. The photo-sensing array includes plural photo sensors arranged in an array. The photo sensors are disposed corresponding to the optical openings. One of the photo sensors senses a luminous flux change and generates an erasing signal accordingly. The voltage control circuit receives the erasing signal and outputs a voltage signal accordingly to the liquid crystal control areas corresponding to the photo sensors having the luminous flux change, such that a part or all of cholesteric liquid crystals corresponding to the liquid crystal control areas are morphologically changed so as to clear a part or all of the writing trace.

A display device for conformal mounting on a curved surface inclined at an oblique angle relative to a horizontal plane, the display device comprising: a plurality of pixels, a first set of conductive lines connected to the plurality of pixels; and a second set of conductive lines connected to the plurality of pixels, wherein the first set of conductive lines and the second set of conductive lines are arranged to define a shape of each of the plurality of pixels such that the pixels appear, to a viewer, to extend at least one of horizontally or vertically across the display device when the display device is mounted on the curved surface.

A cholesteric liquid crystal display device and a driving method for improving non-uniform image quality of the cholesteric liquid crystal display device. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display panel and a liquid crystal drive unit. The cholesteric liquid crystal display panel is composed of multiple row circuit structures and multiple column circuit structures. The liquid crystal driving unit sequentially outputs column driving voltages to a plurality of column circuit structures in a scanning manner. After scanning the multiple column circuit structures, the liquid crystal driving unit applies an unselected voltage to the multiple column circuit structures together with more than 18 times the scanning unit time course, so as to make the brightness of the overall picture more uniform.

An electronic apparatus includes a main body, a fixing body, and a first display unit provided on the main body and/or the fixing body, wherein the first display unit has a first visible area and when the eyes of the viewer are a first distance away from the first visible area, a first image area of the image is perceived by the viewer, and when the eyes of the viewer are a second distance away from the first visible area, a second image area of the image is perceived by the viewer. The second image area includes the first image area and the first distance is larger than the second distance. A first content in the first image is displayed in the first image area, wherein the first content is perceived by the viewer when eyes of the viewer are the first distance away from the first visible area.

A display driver includes an amplifier circuit configured to output time-sequentially arrayed first to n-th data voltages to an image-signal input terminal, and a switch-control-signal output circuit configured to output switch control signals that control the first to n-th switches disposed between the image-signal input terminal and respective first to n-th data lines. The switch-control-signal output circuit outputs the switch control signals that turn on two or more switches including a p-th switch (where p is an integer within the range of 2 to n, inclusive) among the first to n-th switches during a first driving period. The amplifier circuit outputs a p-th data voltage among the first to n-th data voltages during the first driving period.

A liquid crystal drive device includes a common driver configured to sequentially output a scanning signal having a plurality of voltage levels to a plurality of common wirings in a time division manner, a segment driver configured to output a display signal having a plurality of voltage levels to a plurality of segment wirings, and a contrast adjustment unit configured to generate contrast adjustment periods that are inserted into all duty periods, and output, to the common driver and the segment driver, a contrast control signal to control the timing of when the contrast adjustment periods are inserted into the duty periods in synchronization with the timing of the scanning signal and the display signal. The scanning signal and the display signal are output at an identical potential when a contrast adjustment period is indicated by the output of the contrast control signal.