US 12,266,305 B2
High speed pixel circuit for organic light emitting diode (OLED) display
Gyungmin Kim, Santa Clara, CA (US); Min Hyuk Choi, San Jose, CA (US); and Takanori Shibasaki, Cupertino, CA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Mar. 16, 2023, as Appl. No. 18/122,619.
Claims priority of provisional application 63/326,645, filed on Apr. 1, 2022.
Prior Publication US 2023/0317006 A1, Oct. 5, 2023
Int. Cl. G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2300/0819 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0251 (2013.01); G09G 2310/0297 (2013.01); G09G 2310/08 (2013.01); G09G 2320/045 (2013.01); G09G 2330/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a data line;
a gate line intersecting with the data line; and
a pixel coupled to the data line and the gate line, the pixel comprising:
an organic light emitting diode (OLED) coupled to a low voltage source;
a data select switch selectively passing through pixel data from the data line responsive to receiving a gate signal from the gate line, the data select switch being turned on during a data writing period for the pixel;
a reference voltage switch selectively passing through a reference voltage responsive to receiving a gate signal from a second gate line, the reference voltage switch being turned on during at least a compensation period for the pixel, wherein the compensation period is before a data preparation period for loading the pixel data for the pixel on the data line;
an emission switch configured to selectively connect to a voltage source higher than the low voltage source, the emission switch being turned on during an emission period for the pixel; and
a driving transistor having a drain coupled to the OLED, a gate coupled to the data select switch and the reference voltage switch to receive the reference voltage in the compensation period and the pixel data in the data writing period, and a source coupled to the emission switch.