US 12,307,944 B2
Systems and methods of driving a display with high bit depth
Ian Kyles, West Linn, OR (US); Nicholas William Melena, Phoenix, AZ (US); Edmund Passon, Scottsdale, AZ (US); and Joshua T. Wiersma, Phoenix, AZ (US)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Feb. 21, 2024, as Appl. No. 18/583,287.
Application 18/583,287 is a continuation of application No. 17/791,153, granted, now 11,984,061, previously published as PCT/US2021/012472, filed on Jan. 7, 2021.
Claims priority of provisional application 62/958,019, filed on Jan. 7, 2020.
Prior Publication US 2024/0194120 A1, Jun. 13, 2024
Int. Cl. G09G 3/20 (2006.01); G09G 3/32 (2016.01); G09G 3/36 (2006.01)
CPC G09G 3/2096 (2013.01) [G09G 3/2007 (2013.01); G09G 3/32 (2013.01); G09G 3/3611 (2013.01); G09G 2310/06 (2013.01); G09G 2310/08 (2013.01); G09G 2370/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display system for driving pixels of a pixel array comprising:
a display subsystem comprising:
display driver circuitry for:
receiving image frame data and commands, the image frame data comprising pixel intensity or brightness values for an image frame or subframe;
processing the image frame data and the commands to determine, for at least one pixel of the pixel array, a pixel drive value and a pixel drive time interval for each bit plane of a plurality of bit planes, the pixel drive value and pixel drive time interval for each bit plane defining a drive waveform; and
generating a command corresponding to the drive waveform; and
a display backplane to receive the command corresponding to the drive waveform, the display backplane comprising:
pixel driver circuitry comprising a pixel circuit for each pixel of the pixel array, each pixel circuit comprising pixel logic circuitry connected to at least one transistor connected to a pixel electrode, the pixel logic circuitry comprising logic elements that generate, in response to the command corresponding to the drive waveform, a digital value output to the at least one transistor to activate or deactivate a current into the pixel electrode,
such that the pixel driver circuitry drives the at least one pixel in accordance with the drive waveform such that an intensity or brightness of the at least one pixel varies for each bit plane according to the corresponding pixel drive value and the corresponding pixel drive time interval, the pixel drive value comprising a pixel drive voltage or a pixel drive current.