Display panel

• US 9,269,751 B2
• Filed: 08/06/2014
• Issued: 02/23/2016
• Est. Priority Date: 05/28/2014
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lee, Meng-Ting, Shen, Shih-Ming
• Primary Examiner(s): HENRY, CALEB E
• Application Number:
  US14/453,609
• Publication Number:
  US 20150349033A1
• Time in Patent Office: 566 Days
• Field of Search: 257/89
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

A display panel is provided. The display panel includes a substrate and a plurality of sub-pixels. The substrate includes a plurality of unit regions. One first sub-pixel, one second sub-pixel, one third sub-pixel and one fourth sub-pixel are disposed in each unit region. Each sub-pixel includes a first electrode layer, a light-emitting layer and a second electrode layer. The light-emitting layer is disposed on the first electrode layer, and the second electrode layer is disposed on the light-emitting layer. The light-emitting layer of each first sub-pixel and the light-emitting layer of each second sub-pixel include a same light-emitting material capable of emitting a first color light and a second color light. A difference between a main peak of the first color light and a main peak of the second color light is within 50 nm in the wavelength range.

Claims

1. A display panel, comprising:

a substrate, comprising a plurality of unit regions, wherein the unit regions are arranged along a first direction and a second direction; and

a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels and a plurality of fourth sub-pixels, disposed on the substrate, wherein each of the unit regions is configured with one first sub-pixel, one second sub-pixel, one third sub-pixel and one fourth sub-pixel, and each of the first sub-pixels, each of the second sub-pixels, each of the third sub-pixels and each of the fourth sub-pixels respectively comprise;

a first electrode layer;

a light-emitting layer, disposed on the first electrode layer; and

a second electrode layer, disposed on the light-emitting layer,

wherein the light-emitting layer of each of the first sub-pixels and the light-emitting layer of each of the second sub-pixels comprise a same light-emitting material, wherein the light-emitting material is capable of emitting a first color light and a second color light, and a difference between a main peak of the first color light and a main peak of the second color light is within 50 nm in a wavelength range, wherein the first electrode layer comprises a reflective conductor layer and a transparent conductive layer disposed on the reflective conductor layer, and a thickness difference between the transparent conductive layer of each of the first sub-pixels and the transparent conductive layer of each of the second sub-pixels ranges from 20 nm to 50 nm.

2. The display panel as claimed in claim 1, wherein

the light-emitting material is a yellow light-emitting material, the first color light is a yellow light, and the second color light is a green light;

or

the light-emitting material is a red light-emitting material, the first color light is a red light, and the second color light is an orange light;

or

the light-emitting material is a green light-emitting material, the first color light is a green light, and the second color light is a cyan light.

3. The display panel as claimed in claim 1, wherein any two of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions respectively have two opposite long sides, and two opposite short sides, wherein an extending direction of the two long sides is parallel to the second direction, and the other two of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are located between the any two sub-pixels and are arranged along the second direction.

4. The display panel as claimed in claim 3, wherein the other two sub-pixels respectively have two opposite long sides and two opposite short sides, wherein an extending direction of the two long sides is parallel to the first direction.

5. The display panel as claimed in claim 3, wherein the any two sub-pixels are the first sub-pixel and the second sub-pixel, wherein the first sub-pixel and the third sub-pixel in each of the unit regions construct a first pixel, the second sub-pixel and the fourth sub-pixel in each of the unit regions construct a second pixel, and the first pixel and the second pixel respectively have an L-shape.

6. The display panel as claimed in claim 3, wherein the any two sub-pixels are the first sub-pixel and the fourth sub-pixel, wherein the first sub-pixel and the second sub-pixel in each of the unit regions construct a first pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions construct a second pixel, and the first pixel and the second pixel respectively have an L-shape.

7. The display panel as claimed in claim 3, wherein the any two sub-pixels are the first sub-pixel and the fourth sub-pixel, wherein the first sub-pixel and the third sub-pixel in each of the unit regions construct a first pixel, the second sub-pixel and the fourth sub-pixel in each of the unit regions construct a second pixel, and the first pixel and the second pixel respectively have an L-shape.

8. The display panel as claimed in claim 1, wherein the unit regions are arranged in delta arrangement.

9. The display panel as claimed in claim 1, wherein the unit regions are arranged into a plurality of unit region rows along the first direction, and any of the unit region row is arranged in dislocation with a next unit region row.

10. The display panel as claimed in claim 9, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions respectively have two opposite long sides and two opposite short sides, an extending directions of the two long sides of the first sub-pixel and the second sub-pixel are parallel to the second direction, extending directions of the two long sides of the third sub-pixel and the fourth sub-pixel are parallel to the first direction, the third sub-pixel and the fourth sub-pixel are located between the first sub-pixel and the second sub-pixel and are arranged along the second direction, and the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions define two rows of a first sub-row and a second sub-row and four columns of a first sub-column, a second sub-column, a third sub-column and a fourth sub-column, wherein

in each of the unit regions, the first sub-pixel is located on the first sub-column and is located on the first sub-row and the second sub-row, the third sub-pixel is located on the second sub-column and the third sub-column and is located on the second sub-row, the second sub-pixel is located on the fourth sub-column and is located on the first sub-row and the second sub-row, and the fourth sub-pixel is located on the second sub-column and the third sub-column and is located on the first sub-row;

and

the first sub-column of a unit region on the second unit region row is aligned to the second sub-column, the third sub-column or the fourth sub-column of a unit region on the first unit region row.

11. The display panel as claimed in claim 9, wherein the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions respectively have two opposite long sides and two opposite short sides, extending directions of the two long sides of the first sub-pixel and the fourth sub-pixel are parallel to the second direction, extending directions of the two long sides of the second sub-pixel and the third sub-pixel are parallel to the first direction, the second sub-pixel and the third sub-pixel are located between the first sub-pixel and the fourth sub-pixel and are arranged along the second direction, and the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions define two rows of a first sub-row and a second sub-row and four columns of a first sub-column, a second sub-column, a third sub-column and a fourth sub-column, wherein

in each of the unit regions, the first sub-pixel is located on the first sub-column and is located on the first sub-row and the second sub-row, the second sub-pixel is located on the second sub-column and the third sub-column and is located on the second sub-row, the fourth sub-pixel is located on the fourth sub-column and is located on the first sub-row and the second sub-row, and the third sub-pixel is located on the second sub-column and the third sub-column and is located on the first sub-row;

and

the first sub-column of a unit region on the second unit region row is aligned to the second sub-column, the third sub-column or the fourth sub-column of a unit region on the first unit region row.

12. The display panel as claimed in claim 9, wherein the first sub-pixel and the second sub-pixel in each of the unit regions respectively have two opposite long sides and two opposite short sides, extending directions of the two long sides of the first sub-pixel and the second sub-pixel are parallel to the second direction, the third sub-pixel and the fourth sub-pixel are located between the first sub-pixel and the second sub-pixel and are arranged along the second direction, and the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions define two rows of a first sub-row and a second sub-row and three columns of a first sub-column, a second sub-column and a third sub-column, wherein

in each of the unit regions, the first sub-pixel is located on the first sub-column and is located on the first sub-row and the second sub-row, the third sub-pixel is located on the second sub-column and is located on the second sub-row, the second sub-pixel is located on the third sub-column and is located on the first sub-row and the second sub-row, and the fourth sub-pixel is located on the second sub-column and is located on the first sub-row;

and

the first sub-column of a unit region on the second unit region row is aligned to the second sub-column or the third sub-column of a unit region on the first unit region row.

13. The display panel as claimed in claim 9, wherein the first sub-pixel and the fourth sub-pixel in each of the unit regions respectively have two opposite long sides and two opposite short sides, extending directions of the two long sides of the first sub-pixel and the fourth sub-pixel are parallel to the second direction, the second sub-pixel and the third sub-pixel are located between the first sub-pixel and the fourth sub-pixel and are arranged along the second direction, and the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in each of the unit regions define two rows of a first sub-row and a second sub-row and three columns of a first sub-column, a second sub-column and a third sub-column, wherein

in each of the unit regions, the first sub-pixel is located on the first sub-column and is located on the first sub-row and the second sub-row, the second sub-pixel is located on the second sub-column and is located on the second sub-row, the fourth sub-pixel is located on the third sub-column and is located on the first sub-row and the second sub-row, and the third sub-pixel is located on the second sub-column and is located on the first sub-row;

and

the first sub-column of a unit region on the second unit region row is aligned to the second sub-column or the third sub-column of a unit region on the first unit region row.

14. A display panel, comprising:

a substrate, comprising a plurality of unit regions, wherein the unit regions are arranged along a first direction and a second direction; and

a plurality of first sub-pixels, a plurality of second sub-pixels, a plurality of third sub-pixels and a plurality of fourth sub-pixels, disposed on the substrate, wherein each of the unit regions is configured with one first sub-pixel, one second sub-pixel, one third sub-pixel and one fourth sub-pixel, and each of the first sub-pixels, each of the second sub-pixels, each of the third sub-pixels and each of the fourth sub-pixels respectively comprise;

a first electrode layer;

a light-emitting layer, disposed on the first electrode layer; and

a second electrode layer, disposed on the light-emitting layer,

wherein the light-emitting layer of each of the first sub-pixels and the light-emitting layer of each of the second sub-pixels comprise a same light-emitting material, wherein the light-emitting material is capable of emitting a first color light and a second color light, and a difference between a main peak of the first color light and a main peak of the second color light is within 50 nm in a wavelength range, wherein each of the first sub-pixels, each of the second sub-pixels, each of the third sub-pixels and each of the fourth sub-pixels respectively comprise a hole transport layer disposed on the first electrode layer, wherein a thickness difference between the hole transport layer of each of the first sub-pixels and the hole transport layer of each of the second sub-pixels ranges from 20 nm to 50 nm.