The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2019
Filed:
Jun. 23, 2016
Applicant:
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Inventors:
Daisuke Kubota, Atsugi, JP;
Makoto Kaneyasu, Fukuoka, JP;
Assignee:
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1362 (2006.01); G02F 1/1368 (2006.01); H01L 29/786 (2006.01); G09G 3/36 (2006.01);
U.S. Cl.
CPC ...
G02F 1/136286 (2013.01); G02F 1/1368 (2013.01); G09G 3/3648 (2013.01); H01L 29/786 (2013.01); G02F 2201/40 (2013.01); G02F 2202/10 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0465 (2013.01);
Abstract
A novel liquid crystal display device is provided. Two pixels each include a transistor that includes a back gate. The transistor is connected to the common gate line and data line. A threshold voltage is controlled by a control signal supplied to a back gate so that while data is written to one pixel, the transistor of the other pixel is not turned on. The aperture ratio is improved by reducing the number of wirings connected to the pixel and increasing the frequency of the control signal supplied to the back gate.