# US 2015/0102297 A1 · Organic light emitting diode display and method for manufacturing the same

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- Number: US 2015/0102297 A1
- Document ID: US20150102297A1
- Status: Published application
- Kind: A1
- Application number: 14/256,190
- Filed: 2014-04-18
- Published: 2015-04-16
- Earliest claimed: 2013-10-10
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Sang Shin Lee
- Web page: https://patentgrep.com/patent/US20150102297A1

## CPC

- H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels}
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2300/0465: Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

An organic light emitting diode display having a pixel array structure capable of maximizing space use, and a method for manufacturing the same. The organic light emitting diode display includes pixels of a first color, pixels of a second color, and pixels of a third color, each having a longitudinal direction that extends along one of two diagonals of the display and not along a row or a column direction. Furthermore, each of the pixels are arranged in pairs, each pixel of each pair being of a same color and being arranged near each other, extending in a same direction, and being symmetrical about a vertex of a unit area. Each pair of pixels is produced by deposition of an emission material into a single opening in a fine metal mask, leading to improved aperture ratio and improved use of space.

## Claims

### Claim 1

An organic light emitting diode display, comprising:
a plurality of pixels of a first color, a plurality of pixels of a second color, and a plurality of pixels of a third color arrayed based on a plurality of virtual unit areas arranged in a matrix, the matrix also including a plurality of vertexes, each vertex being arranged at where corners of adjoining unit areas meet,
wherein each unit area has a rectangular shape having a plurality of sides, each of the sides being approximately parallel to one of a row direction and a column direction,
wherein a first of the pixels of the first color being arranged in a first of the unit areas and being arranged to be closest to a first vertex that is one of two vertexes that a first diagonal line extending in a first diagonal direction of the first of the unit areas intersects, and
wherein a second of the pixels of the first color being arranged in a second of the unit areas, the second of the unit areas being adjacent to the first of the unit areas in the first diagonal direction, wherein the first vertex being arranged in between the first and the second of the pixels of the first color.

### Claim 2 (depends on 1)

The organic light emitting diode display of claim 1, wherein the first of the pixels of the first color being a polygon that is longer in the first diagonal direction than in any other direction.

### Claim 3 (depends on 2)

The organic light emitting diode display of claim 2, wherein the first and the second of the pixels of the first color that share the first vertex are symmetrical to each other with respect to the shared first vertex.

### Claim 4 (depends on 2)

The organic light emitting diode display of claim 2, wherein:
a first of the pixels of the second color being arranged in a third of the unit areas and being arranged closest to a second vertex that is one of two vertexes that a second diagonal line of the third of the unit areas intersects, the second diagonal line extending in a second diagonal direction that is a different from the first diagonal direction, and
a second of the pixels of the second color being arranged in a fourth of the unit areas, the fourth of the unit areas being adjacent to the third of the unit areas in the second diagonal direction, wherein the second vertex being arranged in between the first and the second of the pixels of the second color.

### Claim 5 (depends on 4)

The organic light emitting diode display of claim 4, wherein the second of the pixels of the second color being a polygon that is longer in the second diagonal direction than in any other direction.

### Claim 6 (depends on 5)

The organic light emitting diode display of claim 5, wherein the first and the second of the pixels of the second color that share the second vertex are symmetrical to each other with respect to the shared second vertex.

### Claim 7 (depends on 2)

The organic light emitting diode display of claim 2, wherein a first pixel of the third color is arranged in the first of the unit areas and is adjacent to a third vertex that is one of two vertexes that a second diagonal line of the first of the unit areas intersects, the second diagonal line extending in a second diagonal direction that is different from the first diagonal direction.

### Claim 8 (depends on 7)

The organic light emitting diode display of claim 7, wherein the first of the pixels of the third color is a polygon that is longer in the first diagonal direction than in any other direction.

### Claim 9 (depends on 8)

The organic light emitting diode display of claim 8, wherein longitudinal directions of differing pixels of the third color arranged in unit areas that are adjacent in the row direction or the column direction are different from each other.

### Claim 10 (depends on 7)

The organic light emitting diode display of claim 7, wherein the first of the pixels of the third color is a regular polygon that has a side substantially parallel the first diagonal direction.

### Claim 11 (depends on 7)

The organic light emitting diode display of claim 7, wherein a second of the pixels of the third color is arranged in a third of the unit areas while being adjacent to the first of the pixels of the third color while sharing a same third vertex, the first and the second of the pixels of the third color being symmetrical to each other with respect to the shared third vertex.

### Claim 12 (depends on 1)

The organic light emitting diode display of claim 1, wherein at least one of a distance between two of the pixels of the first color that are adjacent to each other in a row direction or a column direction, a distance between two of the pixels of the second color that are adjacent to each other in a row direction or a column direction, and a distance between two of the pixels of the third color that are adjacent to each other in a row direction or a column direction is approximately 100 μm or less.

### Claim 13 (depends on 1)

The organic light emitting diode display of claim 1, wherein one of the pixels of the third color and one of the pixels of either the first or the second color are arranged in each of the unit areas, wherein the pixels of the third color is are green pixels.

### Claim 14 (depends on 13)

The organic light emitting diode display of claim 13, wherein a length of each of the pixels of the third color is approximately half of that of each of the pixels of the first color and the pixels of the second color.

### Claim 15

A method for manufacturing an organic light emitting diode display, comprising:
forming pixel electrodes on an insulating substrate for each of a plurality of pixels of a first color, for each of a plurality of pixels of a second color, and for each of a plurality of pixels of a third color;
depositing a first emission layer on the pixel electrodes of the pixels of the first color by using a first fine metal mask; and
forming a common electrode on the first emission layer, wherein the first fine metal mask includes a first opening corresponding to a pair of the pixels of the first color that are adjacent to each other.

### Claim 16 (depends on 15)

The method of claim 15, wherein:
the pixels of the first color, the pixels of the second color, and the pixels of the third color are arranged based on a plurality of virtual unit areas that are arranged in a matrix, the matrix also including a plurality of vertexes, each of the vertexes being arranged where corners of adjoining unit areas meet,
each of the unit areas has a rectangular shape having a plurality of sides, each of the sides being approximately parallel to one of a row direction and a column direction,
each of the pixels of the first color are arranged in pairs, wherein a first pixel and a second pixel each pair of pixels of the first color share a same vertex and are arrayed on a first diagonal line that extends in a first diagonal direction, wherein the first pixel of the pair of pixels of the first color is arranged in a first of the unit areas, and is arranged closer to a first vertex that is one of two vertexes that the first diagonal line of the first unit area intersects, and
the second pixel of the pair of pixels of the first color being arranged in a second of the unit areas, the second of the unit areas being adjacent to the first of the unit areas in the first diagonal direction.

### Claim 17 (depends on 16)

The method of claim 16, further comprising:
depositing a second emission layer on the pixel electrodes of the pixels of the second color by using a second fine metal mask,
wherein the second fine metal mask includes a second opening corresponding to a pair of the second pixels that are adjacent to each other.

### Claim 18 (depends on 17)

The method of claim 17, wherein:
each of the pixels of the second color are arranged in pairs, wherein a first pixel and a second pixel each pair of pixels of the second color share a same vertex and are arrayed on a second diagonal line that extends in a second diagonal direction that is different from the first diagonal direction, wherein the first pixel of the pair of pixels of the second color is arranged in a third of the unit areas, and is arranged closer to a second vertex that is one of two vertexes that the second diagonal line of the third unit area intersects, and
the second pixel of the pair of pixels of the second color is arranged in a fourth of the unit areas, the fourth of the unit areas being adjacent to the third of the unit areas in the second diagonal direction.

### Claim 19 (depends on 18)

The method of claim 18, further comprising:
depositing a third emission layer on the pixel electrodes of the pixels of the third color by using a third fine metal mask,
wherein the third fine metal mask includes a third opening corresponding to a pair of the pixels of the third color that are adjacent to each other.

### Claim 20 (depends on 19)

The method of claim 19, wherein a first of the pixels of the third color being arranged in the first of the unit areas and being adjacent to a third vertex that is one of two vertexes that a second diagonal line extending in the second diagonal direction within the first of the unit areas intersects.