ORGANIC LIGHT EMITTING DISPLAY DEVICE

• US 20180190740A1
• Filed: 12/26/2017
• Published: 07/05/2018
• Est. Priority Date: 12/30/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Granted Patent: US 10,483,335 B2
• Time in Patent Office: Days
• CPC Class Codes: H01L 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
• CPC Class Codes: H10K 50/13 comprising stacked EL layers within one EL unit
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light emitting display device includes a first electrode in an emission area of a subpixel; a pixel defining layer surrounding the first electrode in a non-emissive area of the subpixel; a light emitting layer on the first electrode; a second electrode on the light emitting layer; a first encapsulation layer on the second electrode; and a color filter on the first encapsulation layer in the subpixel.

Claims

1. An organic light emitting display device, comprising:

a first electrode of a subpixel;

a pixel defining layer surrounding the first electrode in a non-emissive area of the subpixel;

a light emitting layer on the first electrode;

a second electrode on the light emitting layer;

a first encapsulation layer on the second electrode; and

a color filter on the first encapsulation layer in the subpixel.

2. The organic light emitting display device of claim 1, wherein the pixel defining layer includes:

a first pixel defining layer;

a second pixel defining layer on the first pixel defining layer, the second pixel defining layer having a width wider than a width of the first pixel defining layer;

a first metal layer on the second pixel defining layer; and

a third pixel defining layer on the first metal layer.

3. The organic light emitting display device of claim 2, wherein a height of the third pixel defining layer is higher than a height of each of the first pixel defining layer, the second pixel defining layer, and the first metal layer.

4. The organic light emitting display device of claim 2, wherein the light emitting layer includes:

a first organic light emitting layer on the first electrode;

a charge generation layer on the first organic light emitting layer; and

a second organic light emitting layer on the charge generation layer,

wherein a height of the charge generation layer is lower than a height of the first pixel defining layer.

5. The organic light emitting display device of claim 4, wherein the second organic light emitting layer, the second electrode, and the first encapsulation layer are sequentially disposed on the third pixel defining layer.

6. The organic light emitting display device of claim 5, wherein the second electrode includes a transparent conductive material, and

wherein a refractive index of each of the first to third pixel defining layers is lower than a refractive index of the light emitting layer, a refractive index of the second electrode, a refractive index of the first encapsulation layer, and a refractive index of the color filter.

7. The organic light emitting display device of claim 5, wherein the second electrode includes a semi-transmissive conductive material.

8. The organic light emitting display device of claim 5, wherein a voltage is not applied to the first metal layer.

9. The organic light emitting display device of claim 4, wherein the second electrode contacts a side surface of the first metal layer.

10. The organic light emitting display device of claim 4, further comprising a reflective metal layer covering the second and third pixel defining layers, wherein the second metal layer contacts a side surface of the first metal layer.

11. The organic light emitting display device of claim 10, wherein the second organic light emitting layer, the second electrode, and the first encapsulation layer are sequentially disposed on the second metal layer.

12. The organic light emitting display device of claim 11, wherein the second electrode includes at least one of a transparent conductive material and a semi-transmissive conductive material.

13. The organic light emitting display device of claim 1, further comprising a second encapsulation layer on the color filter, wherein each of the first and second encapsulation layers includes at least one inorganic layer.

14. The organic light emitting display device of claim 1, wherein the light emitting layer is on the pixel defining layer.