US 12,249,294 B2
Dual-voltage pixel circuitry for liquid crystal display
James L. Sanford, Santa Monica, CA (US); Howard V. Goetz, Tigard, OR (US); and Stewart S. Taylor, Beaverton, OR (US)
Assigned to Snap Inc., Santa Monica, CA (US)
Appl. No. 18/252,462
Filed by Snap Inc., Santa Monica, CA (US)
PCT Filed Dec. 10, 2020, PCT No. PCT/US2020/064153
§ 371(c)(1), (2) Date May 10, 2023,
PCT Pub. No. WO2022/125089, PCT Pub. Date Jun. 16, 2022.
Prior Publication US 2023/0377532 A1, Nov. 23, 2023
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3696 (2013.01) [G09G 2300/0828 (2013.01); G09G 2300/0838 (2013.01); G09G 2300/0857 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pixel circuit for supplying an output voltage to a pixel electrode in a display, the pixel circuit comprising:
a plurality of static random-access memory (SRAM) units;
a level shift circuit connected to at least one of the plurality of SRAM units, wherein the level shift circuit converts a core voltage to the output voltage supplied to the pixel electrode, the core voltage being lower than the output voltage, the level shift circuit comprising a first transistor and a second transistor; and
an update circuit connected to the level shift circuit that toggles between a voltage VREFON and a voltage VREFOFF.