Title:
表示装置
Document Type and Number:
Japanese Patent JP7196240
Kind Code:
B2
Abstract:
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.
More Like This:
Inventors:
Kimura Hajime
Yoshinori Yasunori
Nagaaki Shishido
Atsushi Umezaki
Makoto Yanagisawa
Sanpei Yamazaki
Yoshinori Yasunori
Nagaaki Shishido
Atsushi Umezaki
Makoto Yanagisawa
Sanpei Yamazaki
Application Number:
JP2021108494A
Publication Date:
December 26, 2022
Filing Date:
June 30, 2021
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G02F1/13357; F21S2/00; G02F1/133; G09G3/20; G09G3/34; G09G3/36; H05B45/10; H05B47/105
Domestic Patent References:
| JP2002297097A |
Foreign References:
| WO2001091098A1 |