US 12,394,358 B2
Display device providing uniform luminance characteristics even when operation frequency is varied
Jakyoung Jin, Yongin-si (KR); Jihye Kim, Yongin-si (KR); Yu-Chol Kim, Yongin-si (KR); Jin-Wook Yang, Yongin-si (KR); Seongoh Yeom, Yongin-si (KR); and Eui-Myeong Cho, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Nov. 6, 2023, as Appl. No. 18/387,293.
Claims priority of application No. 10-2023-0008031 (KR), filed on Jan. 19, 2023.
Prior Publication US 2024/0249661 A1, Jul. 25, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/2096 (2013.01) [G09G 3/32 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0294 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/028 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of pixels, each of the plurality of pixels including:
a light-emitting element; and
a pixel driving circuit connected to a first electrode of the light-emitting element; and
a panel driver which drives the display panel in a first mode where an operating frequency is fixed, and a second mode where the operating frequency is variable, the panel driver comprising a driving controller and a voltage generator,
wherein the driving controller determines whether the operating frequency corresponds to one of predetermined compensation frequencies in the second mode, and outputs a voltage control signal depending on a determination result,
the voltage generator changes a voltage level of an anode initialization voltage applied to the first electrode in response to the voltage control signal,
wherein, in the second mode, the operating frequency is changed in units of a driving frame,
wherein the driving frame includes a first driving frame, in which the operating frequency has a first operating frequency, and a second driving frame in which the operating frequency has a second operating frequency lower than the first operating frequency,
wherein the first driving frame includes a first write frame,
wherein the second driving frame includes a second write frame and a holding frame, and
wherein the voltage level of the anode initialization voltage is changed in the holding frame.