US 11,837,156 B2
Display device having a pixel driver with a pulse width modulation and a pulse amplitude modulation signals
Jung Hwan Hwang, Seongnam-si (KR); Hyun Joon Kim, Hwaseong-si (KR); Kye Uk Lee, Seoul (KR); Sang Jin Jeon, Hwaseong-si (KR); and Jun Ki Jeong, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Jun. 17, 2022, as Appl. No. 17/807,690.
Claims priority of application No. 10-2021-0138934 (KR), filed on Oct. 19, 2021.
Prior Publication US 2023/0121681 A1, Apr. 20, 2023
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2320/0633 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A display device comprising:
a scan write line configured to receive a scan write signal;
a pulse width modulation (PWM) emission line configured to receive a PWM emission signal;
a pulse amplitude modulation (PAM) emission line configured to receive a PAM emission signal;
a sweep signal line configured to receive a sweep signal;
a first data line configured to receive a first data voltage;
a second data line configured to receive a second data voltage; and
a subpixel connected to the scan write line, the PWM emission line, the PAM emission line, the sweep signal line, the first data line, and the second data line, and comprising:
a light emitting element;
a first pixel driver that is configured to supply a control current to a node according to the first data voltage in response to the PWM emission signal;
a second pixel driver that is configured to generate a driving current according to the second data voltage in response to the PWM emission signal; and
a third pixel driver that is configured to supply the driving current to the light emitting element according to the PAM emission signal and a voltage of the node,
wherein the PWM emission signal comprises a plurality of PWM pulses generated during one frame period,
wherein the PAM emission signal comprises a plurality of PAM pulses generated during the one frame period, and
wherein a number of the PWM pulses of the PWM emission line during the one frame period is greater than a number of the PAM pulses of the PAM emission line during the one frame period.