# US 2017/0255035 A1 · Liquid crystal display panel

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- Number: US 2017/0255035 A1
- Document ID: US20170255035A1
- Status: Published application
- Kind: A1
- Application number: 15/447,136
- Filed: 2017-03-02
- Published: 2017-09-07
- Earliest claimed: 2016-03-02
- Assignees: Au Optronics Corporation
- Applicants: Au Optronics Corporation
- Inventors: Yi-Fen Lan; Pu-Jung Huang; Cheng-Yeh Tsai
- Web page: https://patentgrep.com/patent/US20170255035A1

## CPC

- G02F 1/137: characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F 1/13306: {Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence)}
- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F 1/133769: {comprising an active, e.g. switchable, alignment layer}
- G02F 1/134318: {having a patterned common electrode}
- G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/13793: {Blue phases}
- G02F 2201/121: common or background
- G02F 2201/123: pixel
- 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 liquid crystal display (LCD) panel includes a first substrate, electrode patterns, a second substrate, and a liquid crystal (LC) layer. The electrode patterns are located on the first substrate, and a lateral electric field is generated via the electrode patterns according to a driving voltage. The second substrate is located opposite to the first substrate. The LC layer is located between the first and second substrates and includes a voltage driven LC layer and an induced LC layer. The voltage driven LC layer is located on the electrode patterns and is driven by the driving voltage to be optically anisotropic or optically isotropic. The induced LC layer is located between the voltage driven LC layer and the second substrate and induced to be optically anisotropic when the voltage driven LC layer is driven to be optically anisotropic. A thickness of the LC layer is larger than 4 μm.

## Claims

### Claim 1

A liquid crystal display panel comprising:
a first substrate;
a plurality of electrode patterns located on the first substrate, a lateral electric field being generated via the electrode patterns according to a driving voltage;
a second substrate located opposite to the first substrate; and
a liquid crystal layer located between the first substrate and the second substrate, the liquid crystal layer comprising:
a voltage driven liquid crystal layer located on the electrode patterns and driven by the driving voltage to be optically anisotropic or optically isotropic; and
an induced liquid crystal layer located between the voltage driven liquid crystal layer and the second substrate and induced to be optically anisotropic when the voltage driven liquid crystal layer is driven to be optically anisotropic,
wherein a thickness of the liquid crystal layer is larger than 4 μm.

### Claim 2 (depends on 1)

The liquid crystal display panel according to claim 1, wherein the thickness of the liquid crystal layer is 7.5 μm to 9.2 μm.

### Claim 3 (depends on 1)

The liquid crystal display panel according to claim 1, wherein a thickness of each of the electrode patterns is smaller than 0.5 μm.

### Claim 4 (depends on 1)

The liquid crystal display panel according to claim 1, further comprising a plurality of protrusions on the first substrate, each of the electrode patterns being correspondingly arranged on a surface of one of the protrusions.

### Claim 5 (depends on 4)

The liquid crystal display panel according to claim 4, wherein a thickness of each of the protrusions is larger than or equal to 0.5 μm.

### Claim 6 (depends on 4)

The liquid crystal display panel according to claim 4, wherein each of the protrusions comprises a top surface, a bottom surface, and two side surfaces located between the top surface and the bottom surface, and the electrode pattern on each of the protrusions is located on the top surface of the corresponding protrusion.

### Claim 7 (depends on 6)

The liquid crystal display panel according to claim 6, further comprising a plurality of bottom electrode patterns, each of the bottom electrode patterns being correspondingly located on the bottom surface of one of the protrusions.

### Claim 8 (depends on 4)

The liquid crystal display panel according to claim 4, wherein each of the protrusions comprises a top surface, a bottom surface, and two side surfaces located between the top surface and the bottom surface, and the electrode pattern on each of the protrusions is located on the top surface of the corresponding protrusion and covers at least a portion of the two side surfaces of the corresponding protrusion.

### Claim 9 (depends on 4)

The liquid crystal display panel according to claim 4, further comprising a buffer layer on the first substrate, the protrusions being located on the buffer layer, the buffer layer located between two adjacent protrusions having a recess pattern.

### Claim 10 (depends on 1)

The liquid crystal display panel according to claim 1, further comprising a buffer layer on the first substrate, the electrode patterns being located on the buffer layer, the buffer layer located between two adjacent electrode patterns having a recess pattern.