Liquid-crystal display device

Patent metadata

Field	Value
Publication number	US-2019196238-A1
Application number	US-201816217627-A
Country	US
Kind code	A1
Filing date	Dec 12, 2018
Priority date	Dec 22, 2017
Publication date	Jun 27, 2019
Grant date	—

Abstract

Provided is a liquid-crystal display device. The liquid-crystal display device includes gate lines and data lines disposed on a substrate and overlapping with one another to define sub-pixels, two thin-film transistors disposed together in a circuit area of one of two sub-pixels next to each other in a horizontal direction among the sub-pixels; and common electrodes and pixel electrodes disposed alternately in each of the sub-pixels. The two thin-film transistors are connected to the two sub-pixels, respectively.

First claim

1 . A liquid-crystal display device, comprising:
a substrate; sub-pixels; gate lines and data lines disposed on the substrate and overlapping with one another to separate the sub-pixels from each other; two thin-film transistors disposed together in a circuit area of one of two sub-pixels aligned with each other in a horizontal direction among the sub-pixels; and common electrodes and pixel electrodes disposed alternately in each of the sub-pixels, wherein the two thin-film transistors are electrically coupled to the two sub-pixels, respectively.

2 . The device of claim 1 , further comprising:
color filters disposed in the sub-pixels; and a light-blocking layer disposed at a boundary between two sub-pixels aligned with each other in a vertical direction among the sub-pixels, the light-blocking layer including at least one of the color filters.

3 . The device of claim 2 , wherein the light-blocking layer includes a blue color filter on a red color filter.

4 . The device of claim 1 , further comprising:
a common line disposed between a lower side of the sub-pixels and the gate lines, the common line extending in a direction parallel to the gate lines.

5 . The device of claim 4 , further comprising:
a first light-blocking line disposed on at least one side of each of the data lines, the first light-blocking line being electrically coupled to the common line; and a second light-blocking line disposed above each of the data lines.

6 . The device of claim 1 , further comprising:
a first pixel electrode connection portion disposed in the circuit area of the one of the two sub-pixels, the first pixel electrode connection portion being electrically coupled to a pixel electrode of the one of the two sub-pixels, the first pixel electrode connection portion extending through a first contact hole; and a second pixel electrode connection portion electrically coupled to a pixel electrode of the other of the two sub-pixels, the second pixel electrode connection portion extending through a second contact hole.

7 . The device of claim 6 , wherein the second pixel electrode connection portion is electrically coupled to the pixel electrode of the other of the two sub-pixels via one of the data lines disposed between the two sub-pixels.

8 . The device of claim 1 , wherein the sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels, wherein the red sub-pixels, the green sub-pixels, and the blue sub-pixels are arranged repeatedly and sequentially in each of a plurality of rows, and wherein sub-pixels of the same color among the red sub-pixels, the green sub-pixels, and the blue sub-pixels are arranged repeatedly in each of a plurality of columns.

9 . The device of claim 1 , wherein the sub-pixels includes red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels, wherein the red sub-pixels, the green sub-pixels, the blue sub-pixels, and the white sub-pixels are arranged repeatedly and sequentially in each of a plurality of rows, and wherein sub-pixels of two different colors are arranged repeatedly in each of a plurality of columns.

10 . The display of claim 9 , wherein the sub-pixels of the two different colors are the red sub-pixel and the blue sub-pixel, or the green sub-pixel and the white sub-pixel.

11 . A liquid-crystal display device, comprising:
a substrate; sub-pixels; gate lines and data lines disposed on the substrate and overlapping with one another to separate the sub-pixels from each other; two thin-film transistors disposed together in a circuit area of one of two sub-pixels aligned with each other in a horizontal direction among the sub-pixels; and common electrodes and pixel electrodes disposed alternately in each of the sub-pixels, wherein the two thin-film transistors are disposed together in the circuit area of the one of the two sub-pixels and no thin-film transistor is disposed in a circuit area of the other of the two sub-pixels.

12 . The device of claim 11 , further comprising:
color filters disposed in the sub-pixels; and a light-blocking layer disposed at a boundary between two sub-pixels aligned with each other in a vertical direction among the sub-pixels, the light-blocking layer including at least one of the color filters.

13 . The device of claim 12 , further comprising:
a common line disposed between a lower side of the sub-pixels and the gate lines, the common line extending in a direction parallel to the gate lines.

14 . The device of claim 11 , wherein the two thin-film transistors are electrically coupled to the two sub-pixels, respectively.

15 . The device of claim 11 , further comprising:
a first pixel electrode connection portion disposed in the circuit area of the one of the two sub-pixels, the first pixel electrode connection portion being electrically coupled to a pixel electrode of the one of the two sub-pixels, the first pixel electrode connection portion extending through a first contact hole; and a second pixel electrode connection portion electrically coupled to a pixel electrode of the other of the two sub-pixels, the second pixel electrode connection portion extending through a second contact hole.

16 . The device of claim 15 , wherein the second pixel electrode connection portion is electrically coupled to the pixel electrode of the other of the two sub-pixels via one of the data lines disposed between the two sub-pixels.

17 . The device of claim 11 wherein the two sub-pixels are asymmetrical with each other.

Assignees

• Lg Display Co Ltd

Inventors

• Heo Seounguk
• Jun Wooyeal
• Yu Jiseon
• Yoon Jiae

Classifications

• G02F1/1368 Primary

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title

• G02F2201/40

  Arrangements for improving the aperture ratio · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/13624 Primary

  having more than one switching element per pixel · CPC title