US 8,575,603 B2Granted

Pixel structure of an electroluminescent display panel

AssigneeAu Optronics Corporation

InventorsMiao-Tsai Chu, Meng-Ting Lee

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Abstract

A pixel structure of an electroluminescent display panel includes a first sub-pixel region, a second sub-pixel region, a third sub-pixel region and a fourth sub-pixel region having different cavity lengths. The first sub-pixel region and the second sub-pixel region share a first organic light-emitting layer, which can generate a first primary color light in the first sub-pixel region, and a second primary color light in the second sub-pixel region. The third sub-pixel region and the fourth sub-pixel region share a second organic light-emitting layer, which can generate a third primary color light in the third sub-pixel region, and a fourth primary color light in the fourth sub-pixel region. The first primary color light, the second primary color light, the third primary color light and the fourth primary color light have different spectra of wavelength.

Claims18

Dependent claims

A pixel structure of an electroluminescent display panel having a first sub-pixel region, a second sub-pixel region, a third sub-pixel region and a fourth sub-pixel region, the pixel structure of the electroluminescent display panel comprising:

a first anode, disposed in the first sub-pixel region;
a second anode, disposed in the second sub-pixel region;
a third anode, disposed in the third sub-pixel region;
a fourth anode, disposed in the fourth sub-pixel region;
a first organic light-emitting layer, disposed in the first sub-pixel region and the second sub-pixel region, for generating a first primary color light in the first sub-pixel region and generating a second primary color light in the second sub-pixel region;
a second organic light-emitting layer, disposed in the third sub-pixel region and the fourth sub-pixel region, for generating a third primary color light in the third sub-pixel region and generating a fourth primary color light in the fourth sub-pixel region, wherein the first primary color light, the second primary color light, the third primary color light and the fourth primary color light have different spectra of wavelength;
a first cathode, disposed in the first sub-pixel region;
a second cathode, disposed in the second sub-pixel region;
a third cathode, disposed in the third sub-pixel region;
a fourth cathode, disposed in the fourth sub-pixel region;
and
wherein a first micro cavity is formed between the first anode and the first cathode in the first sub-pixel region, a second micro cavity is formed between the second anode and the second cathode in the second sub-pixel region, a third micro cavity is formed between the third anode and the third cathode in the third sub-pixel region, a fourth micro cavity is formed between the fourth anode and the fourth cathode in the fourth sub-pixel region, and the first micro cavity, the second micro cavity, the third micro cavity and the fourth micro cavity have different cavity lengths.

9 more elements

a first anode, disposed in the first sub-pixel region;
a second anode, disposed in the second sub-pixel region;
a third anode, disposed in the third sub-pixel region;
a fourth anode, disposed in the fourth sub-pixel region;
a first organic light-emitting layer, disposed in the first sub-pixel region, for generating a first primary color light in the first sub-pixel region;
a second organic light-emitting layer, disposed in the second sub-pixel region, the third sub-pixel region and the fourth sub-pixel region, for generating a second primary color light in the second sub-pixel region, generating a third primary color light in the third sub-pixel region, and generating a fourth primary color light in the fourth sub-pixel region, wherein the first primary color light, the second primary color light, the third primary color light and the fourth primary color light have different spectra of wavelength;
a first cathode, disposed in the first sub-pixel region;
a second cathode, disposed in the second sub-pixel region;
a third cathode, disposed in the third sub-pixel region;
a fourth cathode, disposed in the fourth sub-pixel region;
and
wherein a first micro cavity is formed between the first anode and the first cathode in the first sub-pixel region, a second micro cavity is formed between the second anode and the second cathode in the second sub-pixel region, a third micro cavity is formed between the third anode and the third cathode in the third sub-pixel region, a fourth micro cavity is formed between the fourth anode and the fourth cathode in the fourth sub-pixel region, and the first micro cavity, the second micro cavity, the third micro cavity and the fourth micro cavity have different cavity lengths.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/672,685Filed 8 Nov 2012
Priority: TW 100144728 A5 Dec 2011
Published: US 2013/0140535 A16 Jun 2013
Granted: 5 Nov 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H10K 59/30
Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00: devices…
H10K 59/351
Comprising red-green-blue [RGB] subpixels: comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
H10K 59/876
Arrangements for extracting light from the devices: comprising a resonant cavity structure, e.g. Bragg reflector pair
H10K 50/15
Carrier transporting layers: hole transporting layers