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US 11,770,944 B2Granted
Light emitting display device with an optical compensation layer
AssigneeLG Display Co., Ltd.
InventorJi Na Jeon
Life of this patent
Estimating the term…
Abstract
Disclosed is a light emitting display device in which an optical compensation layer for compensating for an optical distance in each of subpixels configured to emit light with different colors is provided together with formation of a thin film transistor array so as to decrease a driving voltage value required to drive an organic stack and to improve processibility.
Claims20
A light emitting display device comprising:
- a substrate comprising first subpixels and second subpixels;
- a plurality of thin film transistors including a first thin film transistor and a second thin film transistor;
- a first transparent electrode and a second transparent electrode at the first subpixels and the second subpixels, respectively;
- a first reflective electrode on the first transparent electrode and connected to the first thin film transistor via the first transparent electrode, and a second reflective electrode on the second transparent electrode and connected to the second thin film transistor via the second transparent electrode;
- a first optical compensation layer on the first reflective electrode;
- a first anode to contact the first optical compensation layer, the first optical compensation layer between the first anode and the first reflective electrode;
- a second anode to contact the second reflective electrode;
- a first unit having at least one first stack comprising a first common layer, a first emission layer to emit light with a first wavelength, and a second common layer, which are sequentially stacked on the first anode;
- a second unit having at least one second stack comprising the first common layer, a second emission layer to emit light with a second wavelength that is less than the first wavelength, and the second common layer, which are sequentially stacked on the second anode;
- and
- a cathode on the first unit and the second unit.
8 more elements
A light emitting display device comprising:
- a substrate having a first subpixel, a second subpixel, and a third subpixel;
- a first reflective electrode, a second reflective electrode and a third reflective electrode respectively provided at the first to third subpixels;
- a first optical compensation layer on the first reflective electrode, and a second optical compensation layer on the third reflective electrode having a thickness that is less than a thickness of the first optical compensation layer;
- a first anode to contact the first optical compensation layer, the first optical compensation layer between the first anode and the first reflective electrode;
- a second anode to contact the second reflective electrode;
- a third anode to contact the second optical compensation layer, the second optical compensation layer between the third anode and the third reflective electrode;
- a bank to overlap edges of the first to the third anodes and to open a first emission part, a second emission part and a third emission part in the first to third subpixels;
- a first common layer on the first to the third emission parts and the bank;
- a first emission layer at the first emission part, a second emission layer at the second emission part and a third emission layer at the third emission part, respectively, wherein the first to third emission layers are on the first common layer;
- a second common layer on the first to third emission layers;
- and
- a cathode on the second common layer,
- wherein the first to third reflective electrodes are respectively connected to thin film transistors on the substrate by first to third transparent electrode layers interposed therebetween.
10 more elements
A light emitting display device comprising:
- a substrate comprising first subpixels and second subpixels;
- a first reflective electrode and a second reflective electrode at the first subpixels and the second subpixels, respectively;
- a first optical compensation layer on the first reflective electrode;
- a first anode to contact the first optical compensation layer, the first optical compensation layer between the first anode and the first reflective electrode;
- a second anode to contact the second reflective electrode;
- a first unit having at least one first stack comprising a first common layer, a first emission layer to emit light with a first wavelength, and a second common layer, which are sequentially stacked on the first anode;
- a first auxiliary optical compensation layer between the first common layer and the first emission layer;
- a second unit having at least one second stack comprising the first common layer, a second emission layer to emit light with a second wavelength that is less than the first wavelength, and the second common layer, which are sequentially stacked on the second anode;
- and
- a cathode on the first unit and the second unit.
7 more elements
Dependencies are inferred from the claim text.