US 11,790,849 B2
Display device and power setting method thereof
Ki Hyun Pyun, Yongin-si (KR); and Hee Sook Park, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 30, 2021, as Appl. No. 17/646,547.
Claims priority of application No. 10-2021-0000556 (KR), filed on Jan. 4, 2021.
Prior Publication US 2022/0215803 A1, Jul. 7, 2022
Int. Cl. G09G 3/3258 (2016.01); G09G 3/00 (2006.01)
CPC G09G 3/3258 (2013.01) [G09G 3/006 (2013.01); G09G 2310/027 (2013.01); G09G 2310/08 (2013.01); G09G 2330/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including pixels arranged in a plurality of areas;
a timing controller configured to generate image data based on input image data;
a data driver configured to generate a data signal corresponding to the generated image data and supply the data signal to the pixels;
a power supply configured to supply a first power supply voltage to the display panel; and
a power controller configured to calculate a load value and a peak grayscale of the entire display panel based on the input image data, receive feedback voltages of the first power supply voltage from first areas of the plurality of areas in which voltage drop of the first power supply voltage occurs, and generate a power control signal for changing the level of the first power supply voltage based on the load value, the peak grayscale, and the feedback voltages,
wherein the power controller is configured to:
calculate a first power code value or supply voltage value using the load value and the peak grayscale;
when substantially all of the feedback voltages are higher than the reference first power supply voltage, output a power control signal corresponding to the first power code value;
when any one of the feedback voltages is lower than the reference first power supply voltage, increase the first power code value and re-receive feedback voltages from the first areas; and
compare magnitudes of the re-received feedback voltages with a magnitude of the reference first power supply voltage.