# US 9,753,345 B2 · Mother substrate for display device, method for manufacturing the same, and method for manufacturing display device

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- Number: US 9,753,345 B2
- Document ID: US9753345B2
- Status: Granted
- Kind: B2
- Application number: 13/732,803
- Filed: 2013-01-02
- Published: 2014-02-27
- Granted: 2017-09-05
- Earliest claimed: 2012-08-22
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Jong-In Kim; Sang Yong No; Kook Hyun Choi; Sang Ki Kwak; Jang Soo Kim
- Web page: https://patentgrep.com/patent/US9753345B2

## CPC

- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F 1/13624: {having more than one switching element per pixel}
- H10H 20/014: {having light-emitting regions comprising only Group IV materials}
- G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy}
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- 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
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

A mother substrate for a display device includes: a first mother substrate and a second mother substrate including a plurality of panel regions and facing each other; a first contact electrode and a second contact electrode on the first mother substrate; a common electrode, a first voltage application electrode and a second voltage application electrode separated from each other and on the second mother substrate; and a liquid crystal layer between the first mother substrate and the second mother substrate. The first voltage application electrode is connected to the first contact electrode, and the second voltage application electrode is connected to the second contact electrode. The first voltage application electrode is applied with a first voltage, and the second voltage application electrode is applied with a second voltage different from the first voltage.

## Claims

### Claim 1

A mother substrate for a display device comprising:
a first substrate and a second substrate each comprising a panel region comprising the display device, and facing each other;
the first substrate facing the second substrate, further comprising:
a first contact electrode, a second contact electrode and a third contact electrode each outside the panel region of the first substrate,
a gate line, a data line and a storage electrode line,
a first switching element, a second switching element and a third switching element each connected to a same gate line and a same data line,
the third switching element connected to the same gate line, the second switching element and the storage electrode line,
a first subpixel electrode connected to the first switching element, and
a second subpixel electrode connected to the second switching element;
the second substrate facing the first substrate, further comprising:
a common electrode, and
a first voltage application electrode and a second voltage application electrode separated from each other and each outside the panel region of the second substrate; and
a liquid crystal layer between the first substrate and the second substrate facing each other,
wherein among the first and second substrates facing each other,
the first voltage application electrode of the second substrate is connected to the first contact electrode and the third contact electrode of the first substrate,
the second voltage application electrode of the second substrate is connected to the second contact electrode of the first substrate,
the first voltage application electrode connected to the first contact electrode of the first substrate is applied with a first voltage, and the second voltage application electrode connected to the second contact electrode of the first substrate is applied with a second voltage different from the first voltage,
the first contact electrode is connected to the same data line,
the second contact electrode is connected to the storage electrode line, and
the third contact electrode is connected to the same gate line to which the first to third switching elements are connected.

### Claim 2 (depends on 1)

The mother substrate of claim 1, wherein
the first switching element comprises a first terminal connected to the same gate line, a second terminal connected to the same data line, and a third terminal connected to the first subpixel electrode,
the second switching element comprises a first terminal connected to the same gate line, a second terminal connected to the same data line, and a third terminal connected to the second subpixel electrode, and
the third switching element comprises a first terminal connected to the same gate line, a second terminal connected to the storage electrode line, and a third terminal connected to the third terminal of the second switching element.

### Claim 3 (depends on 1)

The mother substrate of claim 1, wherein the first voltage is higher than the second voltage.

### Claim 4 (depends on 1)

The mother substrate of claim 1, wherein the first voltage is lower than the second voltage.

### Claim 5 (depends on 1)

The mother substrate of claim 1, wherein
the liquid crystal layer comprises a liquid crystal molecule and a reactive mesogen.

### Claim 6 (depends on 1)

The mother substrate of claim 1, further comprising:
a first alignment layer on the first substrate; and
a second alignment layer on the second substrate,
wherein the first alignment layer and the second alignment layer comprise an alignment material comprising a reactive mesogen.

### Claim 7 (depends on 1)

The mother substrate of claim 1 wherein
a pretilt angle of the liquid crystal molecules on the first subpixel electrode is different from a pretilt angle of the liquid crystal molecules on the second subpixel electrode.

### Claim 8 (depends on 7)

The mother substrate of claim 7, further comprising a reactive mesogen to which ultraviolet rays is irradiated, to react the reactive mesogen,
wherein
the first subpixel electrode of the first substrate is applied with a first voltage from the first voltage application electrode outside the panel region of the second substrate, and the second subpixel electrode of the first substrate is applied with a second voltage from the second voltage application electrode outside the panel region of the second substrate, the second voltage different from the first voltage, and
the reactive mesogen irradiated with the ultraviolet rays, and the first and second subpixel electrodes applied with the different first and second voltages form the different pretilt angles of the liquid crystal molecules on the first and second subpixel electrodes, respectively.

### Claim 9 (depends on 1)

The mother substrate of claim 1, further comprising a reactive mesogen to which ultraviolet rays is irradiated, to react the reactive mesogen,
wherein the reactive mesogen irradiated with the ultraviolet rays, and the first and second voltage application electrodes applied with the different first and second voltages, form different pretilt angles of liquid crystal molecules of the liquid crystal layer on the first and second subpixel electrodes, respectively.