# US 11,906,863 B2 · Display device

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- Number: US 11,906,863 B2
- Document ID: US11906863B2
- Status: Granted
- Kind: B2
- Application number: 17/973,724
- Filed: 2022-10-26
- Published: 2023-02-09
- Granted: 2024-02-20
- Earliest claimed: 2019-03-11
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Kojiro Ikeda; Kentaro Okuyama; Tenfu Nakamura
- Web page: https://patentgrep.com/patent/US11906863B2

## CPC

- G02F 1/1334: based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/133365: {Cells in which the active layer comprises a liquid crystalline polymer}
- G02F 1/1362: Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)}
- G02F 1/136213: {Storage capacitors associated with the pixel electrode}
- G09G 3/3677: {suitable for active matrices only}
- G02F 1/13345: {Network or three-dimensional gels}
- G02F 1/136295: {Materials; Compositions; Manufacture processes}
- 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
- 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

A display device includes a liquid crystal layer between a first substrate and a second substrate. The first substrate includes a wiring line and a pixel electrode. The liquid crystal layer includes a stripe-shaped polymer extending in a first direction and a liquid crystal molecule. The liquid crystal layer includes a first polymer in an area overlapping the wiring line and a second polymer in an area overlapping the pixel electrode. The first polymer includes a first portion extending in a direction different from the first direction. The second polymer includes a second portion extending in a direction different from the first direction. A density of the first portion is higher than a density of the second portion.

## Claims

### Claim 1

A display device comprising:
a plurality of light-emitting elements arranged in a first direction;
a first substrate comprising a first transparent substrate, a wiring line located above the first transparent substrate and extending in the first direction, a switching element electrically connected to the wiring line, and a pixel electrode electrically connected to the switching element;
a second substrate comprising a second transparent substrate and a common electrode overlapping the pixel electrode; and
a liquid crystal layer located between the first substrate and the second substrate, and comprising a stripe-shaped polymer extending in the first direction and a liquid crystal molecule, wherein
the liquid crystal layer comprises a first polymer in an area overlapping the wiring line without overlapping the pixel electrode, and a second polymer in an area overlapping the pixel electrode without overlapping the wiring line,
the first polymer and the second polymer are arranged in a second direction crossing the first direction in planar view,
each of the first polymer and the second polymer is the stripe-shaped polymer,
the first polymer includes a first portion extending in a direction different from the first direction,
the second polymer includes a second portion extending in a direction different from the first direction,
a length of the first portion branching off from a portion extending in the first direction in the first polymer is greater than a length of the second portion branching off from a portion extending in the first direction in the second polymer.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the wiring line is a scanning line extending in the first direction.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the second substrate does not comprise a light-shielding layer at a position overlapping the wiring line.

### Claim 4 (depends on 1)

The display device of claim 1, wherein a part of the light emitting element faces a side surface of the second transparent substrate.

### Claim 5 (depends on 1)

The display device of claim 1, wherein
the first polymer and the second polymer are formed of a same material,
a density of the first portion is higher than a density of the second portion, and
a density of the first polymer is higher than a density of the second polymer in planar view.