US 11,659,638 B2
LED matrix driver to reduce bright coupling
Yan He, Shanghai (CN); Yang Wang, Shanghai (CN); Haibin Shao, Shanghai (CN); Shang Ding, Shanghai (CN); Wei Xu, Suzhou (CN); and Qingjie Ma, Shanghai (CN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Aug. 31, 2021, as Appl. No. 17/463,239.
Prior Publication US 2023/0067472 A1, Mar. 2, 2023
Int. Cl. H05B 45/325 (2020.01); H05B 45/34 (2020.01); G05B 23/02 (2006.01); G09G 3/32 (2016.01)
CPC H05B 45/325 (2020.01) [G05B 23/0218 (2013.01); G09G 3/32 (2013.01); H05B 45/34 (2020.01); G09G 2310/0267 (2013.01); G09G 2320/0219 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light emitting diode (LED) matrix driver comprising:
a scan line switch coupled between a scan line terminal and a ground terminal;
a first voltage clamp coupled to the scan line switch and the scan line terminal, the first voltage clamp including:
an amplifier having an amplifier output and first and second amplifier inputs,
wherein the first amplifier input is coupled to a reference voltage terminal; and
a transistor coupled between the scan line terminal and the ground terminal and having a control terminal, wherein the control terminal is coupled to the second amplifier input and the amplifier output; and
a second voltage clamp coupled to the scan line terminal.