# US 11,307,458 B2 · Display device

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- Number: US 11,307,458 B2
- Document ID: US11307458B2
- Status: Granted
- Kind: B2
- Application number: 17/029,903
- Filed: 2020-09-23
- Published: 2022-03-24
- Granted: 2022-04-19
- Earliest claimed: 2020-09-23
- Applicants: Luca Hung; Joe Huang
- Inventors: Luca Hung; Joe Huang
- Web page: https://patentgrep.com/patent/US11307458B2

## CPC

- G02F 1/133302: {Rigid substrates, e.g. inorganic substrates}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/13336: {Combining plural substrates to produce large-area displays, e.g. tiled displays}
- 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 1/136222: {Colour filters incorporated in the active matrix substrate}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses}
- G02F 2203/03: scattering
- 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 device is provided, including two substrates and a liquid crystal layer. Each of the substrates has two opposite surfaces and two opposite sides. The liquid crystal layer is sandwiched between the two substrates. At least one of the two substrates has an inclined portion on at least one of the two opposite sides which is connected to one of the two opposite surfaces, and has an included angle greater than 90 degrees and less than 180 degrees in association with the connected surface.

## Claims

### Claim 1

A display device, comprising:
two substrates, each of which has two opposite surfaces and two opposite sides; and
a liquid crystal layer sandwiched between the two substrates;
wherein at least one of the two substrates has an inclined portion on at least one of the two opposite sides which is connected to one of the two opposite surfaces and has an included angle greater than 90 degrees and less than 180 degrees in association with the connected surface;
wherein the at least one of the two opposite sides has a vertical portion connecting the other one of the two opposite surfaces, and the inclined portion is greater than the vertical portion in roughness, wherein a portion of the vertical portion is concave.

### Claim 2 (depends on 1)

The display device as claimed in claim 1, further comprising a light source disposed adjacent to one of the two substrates.

### Claim 3 (depends on 2)

The display device as claimed in claim 2, wherein the one of the two substrates adjacent to the light source has the inclined portion on at least one of the two opposite sides.

### Claim 4 (depends on 3)

The display device as claimed in claim 3, wherein a light emitted from the light source passes through the one of the two substrates between which the liquid crystal is sandwiched and a portion of the light moves in the one of the two substrates and is guided by the inclined portion off the one of the two substrates in a different direction than the light passing through the two substrates.

### Claim 5 (depends on 2)

The display device as claimed in claim 2, wherein one of the two opposite surfaces which is connected to the inclined portion faces the light source.

### Claim 6 (depends on 2)

The display device as claimed in claim 2, wherein the light source is direct-type backlight.

### Claim 7 (depends on 1)

The display device as claimed in claim 1, wherein the at least one of the two substrates has another inclined portion and another vertical portion, the inclined portion and the vertical portion are disposed on one of the two opposite sides, and the another inclined portion and the another vertical portion are disposed on another one of the two opposite sides.

### Claim 8 (depends on 7)

The display device as claimed in claim 7, wherein the inclined portion and the another inclined portion are different in roughness.

### Claim 9 (depends on 1)

The display device as claimed in claim 1, wherein the one of the two opposite surfaces connected to the inclined portion is a lower surface, and the inclined portion is greater than the lower surface in roughness.

### Claim 10 (depends on 9)

The display device as claimed in claim 9, wherein another one of the two opposite surfaces not connected to the inclined portion is an upper surface, and the inclined portion is greater than the upper surface in roughness.

### Claim 11 (depends on 1)

The display device as claimed in claim 1, wherein the included angle is ranged from 135° to 165°.

### Claim 12 (depends on 1)

The display device as claimed in claim 1, wherein in a cross-sectional view, a ratio of a length of the inclined portion to a length of the vertical portion is ranged from 0.2 to 2.

### Claim 13 (depends on 1)

The display device as claimed in claim 1, wherein a roughness of the inclined portion is ranged from 1 μm to 5 μm.

### Claim 14 (depends on 1)

The display device as claimed in claim 1, wherein a length of the vertical portion is greater than half of a thickness of the at least one of the two substrates having the inclined portion.

### Claim 15 (depends on 1)

The display device as claimed in claim 1, wherein the vertical portion is connected to the inclined portion.

### Claim 16 (depends on 1)

The display device as claimed in claim 1, further comprising a circuit board disposed on a side of the at least one of the two substrates having the inclined portion, and the circuit board and the inclined portion are disposed on different sides of the at least one of the two substrates.