US 12,148,382 B2
Image change sequence to prevent optical artifacts in low refresh rate AMOLED displays
Sangmoo Choi, Mountain View, CA (US); and Sang Young Youn, Mountain View, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 18/275,822
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Mar. 30, 2021, PCT No. PCT/US2021/070339
§ 371(c)(1), (2) Date Aug. 4, 2023,
PCT Pub. No. WO2022/211868, PCT Pub. Date Oct. 6, 2022.
Prior Publication US 2024/0096280 A1, Mar. 21, 2024
Int. Cl. G09G 3/3258 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2300/0819 (2013.01); G09G 2300/0852 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/021 (2013.01); G09G 2340/0435 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display panel comprising:
a plurality of pixels arranged in an array, the array including rows and columns, each pixel of the array including at least one OLED light-emitting device;
a plurality of pixel circuits, each pixel circuit associated with one of the OLED light-emitting devices and configured to drive its associated OLED light-emitting device;
a display driver configured to supply signals to the pixel circuits to cause the display panel to:
render images on an active area of the panel with a plurality of different refresh rates,
render a first image on the active area with a first refresh rate that is below a threshold refresh rate, and
subsequent to rendering the first image with the first refresh rate, render a second image that is different from the first image on the active area, wherein the rendering of the second image includes rendering a number of initial frames of the second image at a second refresh rate that is at or above the threshold refresh rate, and, after rendering the number of initial frames of the second image at the second refresh rate, rendering additional frames of the second image on the active area with the first refresh rate, wherein the number of initial frames rendered at the second refresh rate is greater than 1 and equal to the quotient of the second refresh rate divided by the first refresh rate.