US 12,272,330 B2
Liquid crystal display device
Kazune Matsumura, Tokyo (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Sep. 26, 2023, as Appl. No. 18/372,733.
Claims priority of application No. 2022-157884 (JP), filed on Sep. 30, 2022.
Prior Publication US 2024/0112644 A1, Apr. 4, 2024
Int. Cl. G09G 3/36 (2006.01); G02F 1/1362 (2006.01); G02F 1/1368 (2006.01)
CPC G09G 3/3648 (2013.01) [G02F 1/136286 (2013.01); G02F 1/1368 (2013.01); G09G 2300/0426 (2013.01); G09G 2320/0247 (2013.01); G09G 2340/0435 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A liquid crystal display device, in which scanning lines extend in a first direction and are arranged in a second direction, video signal lines extend in the second direction and are arranged in the first direction, and pixels are formed in respective regions enclosed by the scanning lines and the video signal lines, wherein
a pixel electrode and a thin-film transistor (TFT) are formed in each of the pixels,
a first insulating film is formed between a common electrode formed in common for a plurality of pixels and the pixel electrode,
the pixel electrode is connected to one of the video signal lines via the TFT,
the TFT has a gate connected to one of the scanning lines,
a constant common voltage is supplied to the common electrode,
the scanning lines are sequentially scanned from a first scanning line in one frame,
a predetermined voltage is applied for a predetermined period to all the scanning lines before a scanning signal is applied to the first scanning line,
the one frame is divided into an active period to scan the scanning lines and a blanking period to maintain data written to each pixel, and
a backlight is ON during a portion of the blanking period.