US 11,869,418 B1
Micro light emitting diode display panel
Shiang-Ning Yang, MiaoLi County (TW); Yung-Chi Chu, MiaoLi County (TW); Chang-Rong Lin, MiaoLi County (TW); and Yu-Ya Peng, MiaoLi County (TW)
Assigned to PlayNitride Display Co., Ltd., Miaoli County (TW)
Filed by PlayNitride Display Co., Ltd., MiaoLi County (TW)
Filed on Oct. 30, 2022, as Appl. No. 17/976,861.
Claims priority of application No. 111133658 (TW), filed on Sep. 6, 2022.
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/2007 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0626 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A micro light emitting diode display panel comprising:
a plurality of pixel structures, each of the pixel structures comprising at least one sub-pixel, and the at least one sub-pixel is configured to emit light in a plurality of luminance intervals, wherein each of the at least one sub-pixel comprises:
a first micro-light-emitting chip, having a first light-emitting area, and configured to emit light corresponding to a first luminance interval according to a first operating current interval; and
a second micro-light-emitting chip, having a second light-emitting area smaller than the first light-emitting area, and configured to emit light corresponding to a second luminance interval according to a second operating current interval, wherein a gray-scale value of the second luminance interval is lower than a gray-scale value of the first luminance interval;
wherein the first micro-light-emitting chip and the second micro-light-emitting chip have the same light-emitting color;
wherein when emitting light, the second micro-light-emitting chip has a smaller slope of a tangent line to a luminance versus current curve than the first micro-light-emitting chip; and
wherein the first micro-light-emitting chip has a first operating current density when emitting light, the second micro-light-emitting chip has a second operating current density when emitting light, and the second operating current density is smaller than the first operating current density.