Pixel structure, OLED display screen and evaporation mask

Patent metadata

Field	Value
Publication number	US-10950666-B2
Application number	US-201916676610-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Aug 31, 2017
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

The present disclosure provides a pixel structure, an OLED display screen, and an evaporation mask. The pixel structure includes a plurality of pixel unit groups arranged in an array. Each of the pixel unit groups includes a first sub-pixel, a second sub-pixel and a third sub-pixel. An edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel. An edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel. At least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in the evaporation mask.

First claim

What is claimed is:

1. A pixel structure, comprising a plurality of pixel unit groups arranged in an array, wherein
each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask; and
wherein the first sub-pixel and the second sub-pixel have a shape of right-angled trapezoid, and the third sub-pixel has a shape of rhombus or hexagon; the right-angled trapezoid has an oblique waist close to the third sub-pixel, and the right-angled trapezoid has a right-angled waist away from the third sub-pixel; and each of the pixel unit groups has a shape of rectangle or square.

2. The pixel structure according to claim 1 , wherein each of the pixel unit groups comprises two first sub-pixels, two second sub-pixels, and one third sub-pixel; each of the pixel unit groups comprises at least two pixel units formed by one first sub-pixel, one second sub-pixel, and one third sub-pixel; and the pixel units in each of the pixel unit groups share the third sub-pixel.

3. The pixel structure according to claim 1 , wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, and the third sub-pixels in the pixel unit groups of adjacent rows are arranged in a staggered manner,
in the pixel unit groups of adjacent rows, orientations of acute angles of the right-angled trapezoids of adjacent first pixels are different, and orientations of acute angles of the right-angled trapezoids of adjacent second pixels are different.

4. The pixel structure according to claim 1 , wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, the third sub-pixels in the pixel unit groups of adjacent rows are arranged in an aligned manner, and two adjacent pixel unit groups in a column and/or row direction are symmetrically distributed with respect to the boundary therebetween,
in the pixel unit groups of adjacent rows, orientations of acute angles of the right-angled trapezoids of adjacent first pixels are same, and orientations of acute angles of the right-angled trapezoids of adjacent second pixels are same.

5. The pixel structure according to claim 1 , wherein the first sub-pixel in each of the pixel unit groups is arranged at one side of the third sub-pixel, the second sub-pixel in each of the pixel unit groups is arranged at the other side of the third sub-pixel, the third sub-pixels in the pixel unit groups of adjacent rows are arranged in an aligned manner, and two adjacent pixel unit groups in a column and/or row direction are symmetrically distributed with respect to the boundary therebetween.

6. The pixel structure according to claim 1 , wherein colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are selected from red, blue, or green, and colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel are different from each other.

7. A pixel structure, comprising a plurality of pixel unit groups arranged in an array, wherein
each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask;
wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, and the third sub-pixels in the pixel unit groups of adjacent rows are arranged in a staggered manner.

8. The pixel structure according to claim 7 , wherein the third sub-pixels in the pixel unit groups of adjacent rows are staggered by a distance half of the pixel unit group.

9. A pixel structure, comprising a plurality of pixel unit groups arranged in an array, wherein
each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel;
at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask; wherein the first sub-pixel and the second sub-pixel in each of the pixel unit groups are arranged around the third sub-pixel, the third sub-pixels in the pixel unit groups of adjacent rows are arranged in an aligned manner, and two adjacent pixel unit groups in a column and/or row direction are symmetrically distributed with respect to the boundary therebetween.

10. An evaporation mask, wherein the evaporation mask is configured to form a pixel structure, comprising: a plurality of pixel unit groups arranged in an array, wherein each of the pixel unit groups comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; an edge of the first sub-pixel close to the third sub-pixel is not parallel to an edge of the first sub-pixel away from the third sub-pixel, and an edge of the second sub-pixel close to the third sub-pixel is not parallel to an edge of the second sub-pixel away from the third sub-pixel; and at least two adjacent first sub-pixels and/or at least two adjacent second sub-pixels of at least two adjacent pixel unit groups are formed by a same mask opening in an evaporation mask, and the evaporation mask comprises a plurality of mask openings,
wherein the mask opening of the evaporation mask is a polygon formed by combining at least two right-angled trapezoids.

11. The evaporation mask according to claim 10 , wherein the mask opening of the evaporation mask has a shape of a hexagon formed by combining lower bottom edges of two right-angled trapezoids, orientations of acute angles of the two right-angled trapezoids are different, and the mask openings in adjacent rows are arranged in a staggered manner.

12. The evaporation mask according to claim 10 , wherein the mask opening of the evaporation mask has a shape of a pentagon formed by combining lower bottom edges of two right-angled trapezoids, acute angles of the two right-angled trapezoids has a same orientation and form a tip of the mask opening, the orientations of the tips of the mask openings in adjacent rows are different, and the mask openings in adjacent rows are arranged in a staggered manner.

13. The evaporation mask according to claim 10 , wherein the mask opening of the evaporation mask has a shape of an isosceles trapezoid formed by combining two right-angled trapezoids, and the mask openings in adjacent rows are arranged in an aligned manner.

14. The evaporation mask according to claim 10 , wherein the mask opening of the evaporation mask has a shape of a hexagon formed by combining f

Assignees

• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Zhou Lifang
• Li Junfeng
• Liu Mingxing
• Wang Xuliang
• Gao Feng

Classifications

• C23C14/04

  Coating on selected surface areas, e.g. using masks · CPC title

• C23C14/042

  using masks · CPC title

• H01L51/0011

  Electricity · mapped topic

• H01L27/3216

  Electricity · mapped topic

• H01L27/3218 Primary

  Electricity · mapped topic