US 12,217,704 B2
Organic light emitting display device
Heum Il Baek, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 25, 2022, as Appl. No. 17/973,283.
Claims priority of application No. 10-2021-0193176 (KR), filed on Dec. 30, 2021.
Prior Publication US 2023/0215385 A1, Jul. 6, 2023
Int. Cl. G09G 3/3291 (2016.01); G09G 3/3266 (2016.01); H01L 27/12 (2006.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01); H10K 59/35 (2023.01)
CPC G09G 3/3291 (2013.01) [G09G 3/3266 (2013.01); H01L 27/124 (2013.01); H01L 27/1255 (2013.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 59/1213 (2023.02); H10K 59/1216 (2023.02); H10K 59/131 (2023.02); H10K 59/353 (2023.02)] 19 Claims
OG exemplary drawing
 
1. An organic light emitting display device comprising:
a display panel comprising a plurality of data lines and a plurality of scan lines intersecting each other with unit pixels arranged in a matrix format, each of the unit pixels being disposed in a region of the display panel where one scan line intersects four data lines;
a data driving circuit configured to drive the plurality of data lines; and
a gate driving circuit configured to drive the plurality of scan lines,
wherein each of the unit pixels comprises at least three subpixels,
wherein one subpixel of the at least three subpixels in each of the un it pixels comprises two emission material layers stacked to form a hole only device (HOD) structure,
wherein the one subpixel is driven by two data lines,
wherein the one subpixel further includes at least two electron transfer layers interposed between a first emission material layer and a second emission material layer of the two emission layers, and
wherein the one subpixel further comprises:
a first electrode and a second electrode; and
a first hole injection layer, a first hole transport layer, the first emission material layer of the two emission material layers, a first electron transfer layer of the at least two electron transfer layer, a charge generation layer, a second electron transfer layer of the at least two electron transfer layer, the second emission material layer of the two emission material layers, a second hole transport layer, and a second hole injection layer that are sequentially stacked in this order between the first electrode and the second electrode.