# US 12,216,349 B2 · Light adjustment device manufacturing method

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- Number: US 12,216,349 B2
- Document ID: US12216349B2
- Status: Granted
- Kind: B2
- Application number: 18/745,235
- Filed: 2024-06-17
- Published: 2024-12-26
- Granted: 2025-02-04
- Earliest claimed: 2023-06-20
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Yoshifumi Kamei; Yoshikatsu Imazeki; Koichi Miyasaka; Yoichi Kamijo; Shuichi Osawa
- Web page: https://patentgrep.com/patent/US12216349B2

## CPC

- G02F 1/133351: {Manufacturing of individual cells out of a plurality of cells, e.g. by dicing}
- G02F 1/133354: {Arrangements for aligning or assembling substrates}
- G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- 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 method of manufacturing a light adjustment device includes a panel unit in which at least four light adjustment panels each including a first substrate and a second substrate overlapping the first substrate in a first direction are stacked in the first direction, and a conductive member that is provided at an end part of the panel unit in a second direction intersecting the first direction and extends in the first direction.

## Claims

### Claim 1

A method of manufacturing a light adjustment device including a panel unit in which at least four light adjustment panels each including a first substrate and a second substrate overlapping the first substrate in a first direction are stacked in the first direction, and a conductive member that is provided at an end part of the panel unit in a second direction intersecting the first direction and extends in the first direction, the method comprising:
a mother substrate holding process of holding a mother substrate constituted by a plurality of the light adjustment panels connected to each other on a holding device;
a cutting process of cutting the mother substrate into the light adjustment panels after the mother substrate holding process;
a stacking process of stacking another mother substrate different from the cut mother substrate on the cut mother substrate in the first direction after the cutting process;
a panel unit producing process of producing the panel unit by repeating the cutting process and the stacking process after the stacking process; and
a conductive member forming process of forming the conductive member at the end part of the panel unit in the second direction after the panel unit producing process, wherein
the mother substrate and the other mother substrate are each constituted by one mother substrate, or the mother substrate and the other mother substrate are each constituted by two stacked mother substrates.

### Claim 2 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein
the mother substrate and the other mother substrate are each constituted by one mother substrate, and
the mother substrate and the other mother substrate are cut one by one in the cutting process.

### Claim 3 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein
the mother substrate and the other mother substrate are each constituted by two stacked mother substrates, and
the mother substrate and the other mother substrate are cut two by two in the cutting process.

### Claim 4 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein the mother substrate is held on the holding device by vacuum adsorption in the mother substrate holding process.

### Claim 5 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein the mother substrate is held on the holding device through a detachable bonding agent in the mother substrate holding process.

### Claim 6 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein the holding device is provided for each of the light adjustment panels to be obtained by cutting the mother substrate.

### Claim 7 (depends on 1)

The method of manufacturing the light adjustment device according to claim 1, wherein the holding device is provided for each of the mother substrates.