Title:
半導体装置
Document Type and Number:
Japanese Patent JP6756807
Kind Code:
B2
Abstract:
A load, a transistor which controls a current value supplied to the load, a capacitor, a power supply line, and first to third switches are provided. After a threshold voltage of the transistor is held by the capacitor, a potential in accordance with a video signal is inputted and a voltage that is the sum of the threshold voltage and the potential is held. Accordingly, variation in current value caused by variation in threshold voltage of the transistor can be suppressed. Therefore, a desired current can be supplied to a load such as a light emitting element. In addition, a display device with a high duty ratio can be provided by changing a potential of the power supply line.
Inventors:
Hajime Kimura
Application Number:
JP2018235666A
Publication Date:
September 16, 2020
Filing Date:
December 17, 2018
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G09G3/3233; G09G3/20; H01L27/32; H01L51/50; H05B33/14; H05B44/00
Domestic Patent References:
| JP2002358048A | ||||
| JP2005195756A |
Foreign References:
| WO2004066249A1 | ||||
| WO2004059843A1 | ||||
| KR20030094721A |