US 11,929,038 B2
Display device, data driving circuit, and display driving method
MooKyoung Hong, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Jul. 14, 2022, as Appl. No. 17/864,802.
Claims priority of application No. 10-2021-0107193 (KR), filed on Aug. 13, 2021.
Prior Publication US 2023/0049523 A1, Feb. 16, 2023
Int. Cl. G09G 3/3291 (2016.01); G09G 3/00 (2006.01); G09G 3/3233 (2016.01); G09G 3/3266 (2016.01)
CPC G09G 3/3291 (2013.01) [G09G 3/006 (2013.01); G09G 3/3233 (2013.01); G09G 3/3266 (2013.01); G09G 2300/0452 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/061 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/021 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel in which a plurality of gate lines to which a scan signal is applied, a plurality of data lines to which a data voltage is applied, a plurality of reference voltage lines to which a reference voltage is applied, and a plurality of subpixels are disposed;
a data driving circuit configured to sense a voltage on one reference voltage line selected from the plurality of reference voltage lines through a first path during a first detecting period and through a second path during a second detecting period before performing a sensing operation of a characteristic value of a driving transistor disposed in the display panel; and
a timing controller configured to control the data driving circuit, to transit on and off states of a current flowing through the reference voltage line during an aging period so that a predetermined level of heat is generated from the reference voltage line, and to determine whether or not the reference voltage line is abnormal using sensing voltages detected from the reference voltage line during the first detecting period and the second detecting period.