US 12,366,934 B2
Touch-sensitive LED display
Dongeek Shin, Mountain View, CA (US); and Paul Joseph Silberschatz, San Francisco, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 18/574,911
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Dec. 30, 2022, PCT No. PCT/US2022/054354
§ 371(c)(1), (2) Date Dec. 28, 2023,
PCT Pub. No. WO2024/144791, PCT Pub. Date Jul. 4, 2024.
Prior Publication US 2025/0077009 A1, Mar. 6, 2025
Int. Cl. G06F 3/042 (2006.01); G06F 3/01 (2006.01); G06F 3/041 (2006.01); G06F 3/04883 (2022.01)
CPC G06F 3/0412 (2013.01) [G06F 3/017 (2013.01); G06F 3/042 (2013.01); G06F 3/04883 (2013.01); G09G 2310/0224 (2013.01); G09G 2310/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for sensing a touch on a display panel, the display panel including an array of pixels comprising light emitting diodes (LEDs), the method comprising:
controlling first pixels from the array of pixels to operate in an illumination state in which LEDs of the first pixels are forward biased to emit light;
selecting, from the array of pixels, pixels to be operated as second pixels to sense touch input, wherein the second pixels are selected based on content in an image frame presented by the display panel;
controlling the second pixels to repeatedly switch between operating in the illumination state and operating in a sensing state, wherein the second pixels include pixels that are interspersed with the first pixels in the array of pixels, wherein operating the second pixels in the illumination state comprises forward biasing the LEDs of the second pixels to emit light, and wherein operating the second pixels in the sensing state comprises reverse biasing the LEDs of the second pixels to detect light;
varying which pixels of the array of pixels are operated as the second pixels to sense touch input over time based on changes to content displayed by the display panel over time;
generating sensing signals indicative of levels of light detected by the second pixels while the second pixels operate in the sensing state;
detecting a touch input to the display panel based on the generated sensing signals indicative of levels of light detected by the second pixels; and
in response to detecting the touch input to the display panel, changing at least one of (i) a frequency at which the second pixels switch between operating in the illumination state and operating in the sensing state, (ii) a duty cycle for operating the second pixels in the sensing state, or (iii) which of the pixels in the array of pixels are controlled to switch between operating in the illumination state and operating in the sensing state.