US 12,230,190 B2
Macro-pixel display backplane
Daniel Henry Morris, Mountain View, CA (US); and Michael Yee, Woodinville, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Nov. 2, 2022, as Appl. No. 18/052,168.
Application 18/052,168 is a continuation of application No. 17/129,554, filed on Dec. 21, 2020, granted, now 11,521,543.
Claims priority of provisional application 62/954,358, filed on Dec. 27, 2019.
Prior Publication US 2023/0136987 A1, May 4, 2023
Int. Cl. G09G 3/32 (2016.01); H01L 27/15 (2006.01)
CPC G09G 3/32 (2013.01) [H01L 27/156 (2013.01); G09G 2300/0857 (2013.01); G09G 2310/0291 (2013.01); G09G 2320/0276 (2013.01); G09G 2320/0285 (2013.01); G09G 2320/0673 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A light emitting diode (LED) driver comprising:
a two-dimensional (2-D) array of macro-pixel drive circuits on an integrated circuit die, each macro-pixel drive circuit of the 2-D array of macro-pixel drive circuits comprising:
a center region including a 2-D array of memory cells configured to store display data for a group of micro-LEDs; and
on each side of two opposing sides of the 2-D array of memory cells,
analog drive circuits for providing drive currents to a respective set of micro-LEDs of the group of micro-LEDs; and
digital drive circuits positioned between the analog drive circuits and the 2-D array of memory cells and configured to control the analog drive circuits using the display data stored in the 2-D array of memory cells,
wherein the digital drive circuits on a first side of the two opposing sides of the 2-D array of memory cells comprise a comparator shared by the digital drive circuits on the two opposing sides, the comparator configured to compare, for each micro-LED of the group of micro-LEDs, display data for driving the micro-LED with a counter value.