US 12,394,390 B2
Source driver having charge share line connecting output lines and display apparatus
Kenichi Shigeta, Yokohama (JP)
Assigned to LAPIS Technology Co., Ltd., Yokohama (JP)
Filed by LAPIS Technology Co., Ltd., Yokohama (JP)
Filed on Mar. 12, 2024, as Appl. No. 18/603,157.
Claims priority of application No. 2023-039255 (JP), filed on Mar. 14, 2023.
Prior Publication US 2024/0312430 A1, Sep. 19, 2024
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3696 (2013.01) [G09G 2320/0247 (2013.01); G09G 2320/045 (2013.01); G09G 2330/021 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A source driver comprising:
a plurality of output amplifiers, supplying a plurality of pixel drive voltages respectively corresponding to a plurality of pixels to each of a plurality of source lines of a display device based on a video signal;
a charge share line, having a charge share switch provided to be able to connect output lines outputting the plurality of pixel drive voltages of the plurality of output amplifiers;
a common voltage line, connected to a common voltage electrode of the display device;
a first power supply line, supplying a first voltage;
a switch part, provided to be able to connect the charge share line and the common voltage line with the first power supply line; and
a control circuit, comprising a first power off detection circuit that detects stoppage of supply of the first voltage from the first power supply line, wherein, in response to the first power off detection circuit detecting that the first power supply line is off, the control circuit short-circuits the plurality of source lines by the charge share line and connects the charge share line and the common voltage line with the first power supply line by the switch part.