US 12,342,430 B2
MicroLED array with adaptive PWM phase shift
Zhi Hua Song, Palo Alto, CA (US); and Ronald Johannes Bonne, Plainfield, IL (US)
Assigned to Lumileds LLC, San Jose, CA (US)
Appl. No. 17/785,344
Filed by Lumileds LLC, San Jose, CA (US)
PCT Filed Dec. 18, 2020, PCT No. PCT/US2020/066173
§ 371(c)(1), (2) Date Jun. 14, 2022,
PCT Pub. No. WO2021/127537, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/951,199, filed on Dec. 20, 2019.
Prior Publication US 2023/0007743 A1, Jan. 5, 2023
Int. Cl. H05B 45/10 (2020.01); H05B 45/325 (2020.01); H05B 45/44 (2020.01)
CPC H05B 45/10 (2020.01) [H05B 45/325 (2020.01); H05B 45/44 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A complementary metal oxide semiconductor (CMOS) die for controlling pixels of a light-emitting diode (LED) array, the CMOS die comprising:
a digital interface to provide control signals to the LED array; and
logic coupled to the digital interface, the logic configured to:
determine duty cycles for each pixel of the pixels based on image data to display an image using the pixels;
segment the pixels into at least first pixels of a first group and second pixels of a second group based on duty cycles of the pixels, the duty cycles of the first pixels being different from the duty cycles of the second pixels; and
determine first turn-on delays for the first pixels based on a first number of the first pixels and second turn-on delays for the second pixels based on a second number of the second pixels for activation of the first pixels and the second pixels in accordance with the first and second turn-on delays, respectively, using the control signals to display the image, wherein LEDs of the LED array are independently-controllable and have lateral dimensions of less than about 100 μm.