US 11,900,843 B2
Display device and display driving method
Jinwon Kim, Gyeonggi-do (KR); and MooKyoung Hong, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Jun. 16, 2022, as Appl. No. 17/842,023.
Claims priority of application No. 10-2021-0108560 (KR), filed on Aug. 18, 2021.
Prior Publication US 2023/0057700 A1, Feb. 23, 2023
Int. Cl. G09G 3/00 (2006.01); G09G 3/20 (2006.01)
CPC G09G 3/006 (2013.01) [G09G 3/2074 (2013.01); G09G 2300/0866 (2013.01); G09G 2330/028 (2013.01); G09G 2330/08 (2013.01); G09G 2330/10 (2013.01); G09G 2330/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel in which a plurality of subpixels including a light emitting element that emits light by a subpixel driving voltage supplied to a driving voltage line, and a plurality of reference voltage lines connected to the plurality of subpixels to detect a characteristic value are disposed;
a data driving circuit configured to supply a display driving reference voltage lower than the subpixel driving voltage, to the driving voltage line through the plurality of reference voltage lines;
a base voltage switching circuit configured to control a base voltage node connected to a cathode electrode of the light emitting element;
a current detecting circuit configured to detect a current flowing between the base voltage node and a ground; and
a timing controller configured to control the base voltage switching circuit and generate a defect detection signal for the driving voltage line according to a current detected from the current detecting circuit by supplying the display driving reference voltage to the driving voltage line through a reference voltage line during a period in which the subpixel driving voltage is not supplied or has a level lower than the display driving reference voltage.