US 11,741,906 B2
Data driving circuit and display device
Changhee Kim, Paju-si (KR); and Kimin Son, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Dec. 22, 2021, as Appl. No. 17/559,340.
Claims priority of application No. 10-2020-0183849 (KR), filed on Dec. 24, 2020; and application No. 10-2021-0135212 (KR), filed on Oct. 12, 2021.
Prior Publication US 2022/0208116 A1, Jun. 30, 2022
Int. Cl. G09G 3/3275 (2016.01)
CPC G09G 3/3275 (2013.01) [G09G 2300/0439 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0626 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel comprising a plurality of subpixels; and
a data driving circuit configured to supply a data voltage to the plurality of subpixels,
wherein each of the plurality of subpixels comprises:
a light-emitting device,
a driving transistor configured to drive the light-emitting device, and
a storage capacitor electrically connected between a first node and a second node of the driving transistor,
wherein the data driving circuit is further configured to:
detect, in an external sensing period, a change value of a threshold voltage of the driving transistor comprised in at least one of the plurality of subpixels, and
supply, in a display period, to at least one subpixel of the plurality of subpixels:
the data voltage, obtained by adding a first voltage corresponding to a luminance of the light-emitting device, and
a second voltage smaller than the change value of the threshold voltage of the driving transistor,
wherein the second voltage is a value obtained by multiplying the change value of the threshold voltage of the driving transistor by a boosting loss ratio.