# US 8,772,799 B2 · Display substrate and method for manufacturing the same

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- Number: US 8,772,799 B2
- Document ID: US8772799B2
- Status: Granted
- Kind: B2
- Application number: 13/406,811
- Filed: 2012-02-28
- Published: 2013-01-10
- Granted: 2014-07-08
- Earliest claimed: 2011-07-08
- Assignees: Samsung Display Co., Ltd.
- Applicants: Dong-Uk Kang; Chul Huh; Sang-Hun Lee; Gwan-Soo Kim
- Inventors: Dong-Uk Kang; Chul Huh; Sang-Hun Lee; Gwan-Soo Kim
- Web page: https://patentgrep.com/patent/US8772799B2

## CPC

- G02F 1/136209: {Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element}
- G02F 1/13394: {spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence)}
- G02F 1/13398: {Spacer materials; Spacer properties}
- G02F 1/136222: {Colour filters incorporated in the active matrix substrate}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A display substrate includes a base substrate, color filter layers, a bottom supporting layer and a light-blocking and maintaining element. The base substrate includes a gate line, a data line crossing the gate line, and a switching element on the base substrate. The color filter layers are adjacent to each other on the base substrate. The bottom supporting layer is between the color filter layers adjacent to each other and on the base substrate. The light-blocking and maintaining element is between the color filter layers adjacent to each other, and on the bottom supporting layer. The light-blocking and maintaining element includes a light blocking portion, and a maintaining portion which overlaps the bottom supporting layer and protrudes from the light blocking portion.

## Claims

### Claim 1

A display substrate comprising:
a base substrate comprising a gate line, a data line crossing the gate line, and a switching element on the base substrate;
color filter layers adjacent to each other on the base substrate;
a bottom supporting layer between the color filter layers adjacent to each other and on the base substrate; and
a light-blocking and maintaining element between the color filter layers adjacent to each other, and on the bottom supporting layer, and comprising a light blocking portion and a maintaining portion, wherein the maintaining portion overlaps the bottom supporting layer and protrudes from the light blocking portion.

### Claim 2 (depends on 1)

The display substrate of claim 1, further comprising:
an inorganic insulating layer which overlaps the color filter layers; and
a pixel electrode which overlaps the inorganic insulating layer,
wherein a distance to an upper surface of the light blocking portion from the base substrate is substantially same as a distance to an upper surface of the pixel electrode from the base substrate.

### Claim 3 (depends on 1)

The display substrate of claim 1, wherein a width of a cross-section of the maintaining portion taken substantially parallel with the base substrate decreases in a direction away from the base substrate.

### Claim 4 (depends on 3)

The display substrate of claim 3, wherein a width of a cross-section of the bottom supporting layer taken substantially parallel with the base substrate decreases in a direction away from the base substrate.

### Claim 5 (depends on 4)

The display substrate of claim 4, wherein a minimum width of the cross-section of the maintaining portion taken in a direction substantially parallel with the base substrate, is larger than a maximum width of the cross-section of the bottom supporting layer taken in the direction substantially parallel with the base substrate.

### Claim 6 (depends on 5)

The display substrate of claim 5, wherein
the minimum width of the cross-section of the maintaining portion is about 35 micrometers, and
the maximum width of the cross-section of the bottom supporting layer is between about 10 micrometers and about 15 micrometers.

### Claim 7 (depends on 3)

The display substrate of claim 3, wherein an angle between a side surface of the maintaining portion and an upper surface of the light blocking portion is about 40°.

### Claim 8 (depends on 1)

The display substrate of claim 1, wherein
the color filter layers and the bottom supporting layer are in a same layer, and
the color filter layers and the bottom supporting layer have a substantially same thickness in a direction perpendicular to the base substrate.

### Claim 9 (depends on 1)

The display substrate of claim 1, further comprising:
an inorganic insulating layer which overlaps the bottom supporting layer and the color filter layers.

### Claim 10 (depends on 9)

The display substrate of claim 9, further comprising:
an organic insulating layer between the inorganic insulating layer and the light-blocking and maintaining element,
wherein an upper surface of the organic insulating layer which overlaps the bottom supporting layer is higher than an upper surface of the organic insulating layer which does not overlap the bottom supporting layer.