US 12,277,899 B2
Display device that prevents a decrease in luminance resulting from drop in voltage
Masafumi Ueno, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/283,133
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed May 7, 2021, PCT No. PCT/JP2021/017430
§ 371(c)(1), (2) Date Sep. 20, 2023,
PCT Pub. No. WO2022/234629, PCT Pub. Date Nov. 10, 2022.
Prior Publication US 2024/0169902 A1, May 23, 2024
Int. Cl. G09G 3/3208 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/3208 (2013.01) [G09G 3/2007 (2013.01); G09G 2300/0452 (2013.01); G09G 2320/0223 (2013.01); G09G 2320/0285 (2013.01); G09G 2330/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of pixels, the plurality of pixels including:
a first subpixel and a second subpixel each including a light-emitting layer emitting light of a first color,
a third subpixel including a light-emitting layer emitting light of a second color, and
a fourth subpixel including a light-emitting layer emitting light of a third color;
a first power supply configured to supply a current to the first subpixel and the third subpixel;
a second power supply configured to supply a current to the second subpixel and the fourth subpixel; and
a signal processing circuit configured to receive an input signal for each pixel of the plurality of pixels and to generate a first signal corresponding to the first subpixel and a second signal corresponding to the second subpixel,
wherein the signal processing circuit generates the first signal and the second signal in such a manner that an amount of current supplied to the second subpixel included in the plurality of pixels is smaller than an amount of current supplied to the first subpixel included in the plurality of pixels when an amount of current to be supplied by the second power supply to the fourth subpixel included in the plurality of pixels is larger than an amount of current to be supplied by the first power supply to the third subpixel included in the plurality of pixels, and
the signal processing circuit generates the first signal and the second signal in such a manner that the amount of current supplied to the second subpixel included in the plurality of pixels is larger than the amount of current supplied to the first subpixel included in the plurality of pixels when the amount of current to be supplied by the second power supply to the fourth subpixel included in the plurality of pixels is smaller than the amount of current to be supplied by the first power supply to the third subpixel included in the plurality of pixels.