# US 7,746,440 B2 · Flat display panel having strength enhancing structure

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- Number: US 7,746,440 B2
- Document ID: US7746440B2
- Status: Granted
- Kind: B2
- Application number: 12/104,448
- Filed: 2008-04-17
- Published: 2009-05-21
- Granted: 2010-06-29
- Earliest claimed: 2007-11-19
- Assignees: Au Optronics Corporation
- Inventors: Yu-Chen Liu; Jong-Wen Chwu; Chao-Cheng Lin; Jer-Yao Wu; Ping-Feng Yu
- Web page: https://patentgrep.com/patent/US7746440B2

## CPC

- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- G02F 2201/50: Protective arrangements
- 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 flat display panel includes a first substrate, a second substrate opposite to the first substrate, a sealant disposed between the first and second substrates. The sealant, the edge of the inner surface of the first substrate, and the edge of the inner surface of the second substrate form a space, and the flat display panel further includes a protection layer disposed inside the space so as to reinforce the structural strength of the flat display panel.

## Claims

### Claim 1

A flat display panel, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate and overlapping the first substrate, an inner surface of the second substrate facing the first substrate and having at least a bonding pad area, the bonding pad area not overlaying the first substrate;
a sealant disposed between an inner surface of the first substrate that faces the second substrate and the inner surface of the second substrate that faces the first substrate for connecting the first substrate and the second substrate, so that the sealant, the edge of the inner surface of the first substrate and the edge of the inner surface of the second substrate form a space; and
a protection layer disposed in the space to enhance the structural strength of the flat display panel, wherein the protection is in contact with an inner surface of the first substrate that faces the second substrate and the inner surface of the second substrate that faces the first substrate.

### Claim 2 (depends on 1)

The flat display panel of claim 1, wherein the protection layer further covers parts of the inner surface of the second substrate, which are not covered by the first substrate.

### Claim 3 (depends on 2)

The flat display panel of claim 2, wherein the protection layer exposes the bonding pad area.

### Claim 4 (depends on 1)

The flat display panel of claim 1, wherein the protection layer further covers an outer surface of the first substrate and/or an outer surface of the second substrate.

### Claim 5 (depends on 1)

The flat display panel of claim 1, wherein the protection layer further covers a side surface of the first substrate and/or a side surface of the second substrate.

### Claim 6 (depends on 1)

The flat display panel of claim 1, wherein the flat display panel comprises a liquid crystal display panel.

### Claim 7 (depends on 1)

The flat display panel of claim 1, wherein the first substrate comprises a color filter substrate, and the second substrate comprises an array substrate.

### Claim 8 (depends on 1)

The flat display panel of claim 1, wherein the protection layer is transparent.

### Claim 9 (depends on 1)

The flat display panel of claim 1, wherein the protection layer comprises a material having a refractive index between 1.0 and 1.5 in a liquid state.

### Claim 10 (depends on 1)

The flat display panel of claim 1, wherein the protection layer comprises a photosensitive material.

### Claim 11 (depends on 1)

The flat display panel of claim 1, wherein the protection layer comprises a colloid material having at least an acryl group, or a silica-based material.