US 12,223,897 B2
Display device having a driving voltage controller and method of driving the same
Kihyun Pyun, Gwangmyeong-si (KR); and Sung-Mo Yang, Hwaseong-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Mar. 21, 2023, as Appl. No. 18/124,044.
Claims priority of application No. 10-2022-0054185 (KR), filed on May 2, 2022.
Prior Publication US 2023/0351963 A1, Nov. 2, 2023
Int. Cl. G09G 3/3233 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/3233 (2013.01) [G09G 3/2096 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0271 (2013.01); G09G 2330/021 (2013.01); G09G 2330/025 (2013.01); G09G 2330/028 (2013.01); G09G 2330/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel displaying an image based on output image data which is converted input image data, and including a plurality of pixels;
a driving voltage controller including:
an overcurrent detector generating an alert signal when a driving current of the display panel is greater than a reference current,
a load calculator calculating a load of the input image data in response to the alert signal and generating a load escape signal when the load is greater than a reference load, and
a vertical blank counter generating a vertical blank count value by counting a time of a vertical blank period of a frame period that includes an active period and the vertical blank period in response to the alert signal and the load escape signal, and generating a counter escape signal when the vertical blank count value is greater than a reference count value; and
a driving voltage generator decreasing a driving voltage provided to the display panel from a high voltage level to a low voltage level in response to the alert signal, and increasing the driving voltage in response to the counter escape signal,
wherein, when the alert signal is generated in a first frame period, the vertical blank period is included in a second frame period following the first frame period.