# US 10,120,254 B2 · Liquid crystal display with increased aperture ratio

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,120,254 B2
- Document ID: US10120254B2
- Status: Granted
- Kind: B2
- Application number: 14/934,931
- Filed: 2015-11-06
- Published: 2016-10-27
- Granted: 2018-11-06
- Earliest claimed: 2015-04-23
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hoon Kim; Hyun Joon Kim; Ki Chul Shin
- Web page: https://patentgrep.com/patent/US10120254B2

## CPC

- G02F 1/13624: {having more than one switching element per pixel}
- G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy}
- 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 includes a first substrate and a second substrate facing each other. The liquid crystal display further includes a gate line and a data line disposed on the first substrate, a first thin film transistor and a second thin film transistor connected to the gate line and the data line, a first subpixel electrode connected to the first thin film transistor, a third thin film transistor connected to the second thin film transistor, a second subpixel electrode connected to the third thin film transistor; and a liquid crystal layer interposed between the first substrate and the second substrate. The third thin film transistor includes a first terminal applied with a same constant voltage during all times of operation, a second terminal directly connected to the second thin film transistor, and a third terminal connected to the second subpixel electrode.

## Claims

### Claim 1

A liquid crystal display comprising:
a first substrate and a second substrate facing each other;
a gate line and a data line disposed on the first substrate;
a first thin film transistor and a second thin film transistor connected to the gate line and the data line;
a first subpixel electrode connected to the first thin film transistor;
a third thin film transistor connected to the second thin film transistor;
a second subpixel electrode connected to the third thin film transistor; and
a liquid crystal layer interposed between the first substrate and the second substrate,
wherein the third thin film transistor includes a first terminal applied with a same constant voltage during all times of operation, a second terminal directly connected to the second thin film transistor, and a third terminal connected to the second subpixel electrode.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein:
a first data voltage applied to the first subpixel electrode is different from a second data voltage applied to the second subpixel electrode.

### Claim 3 (depends on 2)

The liquid crystal display of claim 2, wherein:
a difference in the first data voltage and the second data voltage is determined by the constant voltage applied to the first terminal of the third thin film transistor.

### Claim 4 (depends on 1)

The liquid crystal display of claim 1, wherein:
a resistance of the third thin film transistor is greater than about 0.1 mega-ohm and less than about 1000 mega-ohms.

### Claim 5 (depends on 1)

The liquid crystal display of claim 1, further comprising:
a first voltage line disposed on the first substrate and connected to the third thin film transistor.

### Claim 6 (depends on 5)

The liquid crystal display of claim 5, wherein:
the first voltage line is applied with a constant voltage.

### Claim 7 (depends on 5)

The liquid crystal display of claim 5, wherein:
the first voltage line is disposed in the same layer as the gate line.

### Claim 8 (depends on 5)

The liquid crystal display of claim 5, wherein:
the first voltage line extends in a direction parallel to the gate line.

### Claim 9 (depends on 5)

The liquid crystal display of claim 5, wherein:
the first thin film transistor includes a first gate electrode connected to the gate line, a first semiconductor disposed on the first gate electrode, and a first source electrode and a first drain electrode disposed on the first semiconductor,
the second thin film transistor includes a second gate electrode connected to the gate line, a second semiconductor disposed on the second gate electrode, and a second source electrode and a second drain electrode disposed on the second semiconductor, and
the third thin film transistor includes a third gate electrode connected to the first voltage line, a third semiconductor disposed on the third gate electrode, and a third source electrode and a third drain electrode disposed on the third semiconductor.

### Claim 10 (depends on 9)

The liquid crystal display of claim 9, wherein:
the first source electrode is connected to the data line and the first drain electrode is connected to the first subpixel electrode.

### Claim 11 (depends on 9)

The liquid crystal display of claim 9, wherein:
the second source electrode is connected to the data line, and the second drain electrode is connected to the third source electrode.

### Claim 12 (depends on 9)

The liquid crystal display of claim 9, wherein:
the third source electrode is connected to the second drain electrode, and the third drain electrode is connected to the second subpixel electrode.

### Claim 13 (depends on 9)

The liquid crystal display of claim 9, wherein:
a channel size of the second thin film transistor is the same as a channel size of the third thin film transistor.

### Claim 14 (depends on 1)

The liquid crystal display of claim 1, further comprising:
a shielding electrode overlapping the data line.

### Claim 15 (depends on 14)

The liquid crystal display of claim 14, wherein:
the shielding electrode is disposed in the same layer as the first subpixel electrode and the second subpixel electrode.

### Claim 16 (depends on 15)

The liquid crystal display of claim 15, further comprising:
a connection electrode connecting the adjacent shielding electrodes to each other.