TOUCH-PANEL LIQUID-CRYSTAL DISPLAY DEVICE

• US 20180095317A1
• Filed: 09/29/2017
• Published: 04/05/2018
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: SONG, In-Duk, PARK, Chi-Hyuck, CHOI, Jin-Woo, KIM, Sung-Ho, LEE, Woo-Seock, IIDA, Haruhisa
• Granted Patent: US 10,539,820 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs

Abstract

A touch-panel liquid-crystal display device in one embodiment includes a metal line formed on a thin-film transistor array substrate, a gap column spacer and a push column spacer on a portion of a color filter array substrate that corresponds to an intersection of gate and data lines of the thin-film transistor array substrate, and a liquid-crystal layer between the thin-film transistor array substrate and the color filter array substrate. The gap column spacer and the push column spacer have the same height and the gap column spacer is located on the metal line, which facilitates an exposure process, minimizes generation of foreign substances when printing an alignment layer, and enables adjustment of the optimum amount of liquid crystals when liquid-crystal dotting is performed. The push column spacer is located on the metal line when the device can be pushed or bent by external force, and thus increases panel rigidity.

Claims

1. A touch-panel liquid-crystal display device comprising:

a thin-film transistor array substrate on which a plurality of gate lines and a plurality of data lines are arranged to intersect each other so as to define pixel areas, each pixel area including a thin film transistor;

a metal line formed on the thin-film transistor array substrate;

a color filter array substrate on which a color filter layer is formed on each pixel area;

a gap column spacer and a push column spacer on the color filter array substrate in a portion that corresponds to each intersection of the gate lines and the data lines of the thin-film transistor array substrate; and

a liquid-crystal layer disposed between the thin-film transistor array substrate and the color filter array substrate,

wherein the gap column spacer overlaps the metal line.

2. The touch-panel liquid-crystal display device according to claim 1, wherein the gap column spacer and the push column spacer have a same height.

3. The touch-panel liquid-crystal display device according to claim 1, wherein the metal line is parallel to a corresponding one of the data lines, overlaps the corresponding data line, and is cut in an area thereof that corresponds to the push column spacer.

4. The touch-panel liquid-crystal display device according to claim 1, wherein the metal line is one of a dummy line, a common line that supplies a common voltage, and a sensing line that senses a touch.

5. The touch-panel liquid-crystal display device according to claim 1, further comprising:

a pixel electrode on each pixel area of the thin-film transistor array substrate; and

a common electrode on the color filter array substrate.

6. The touch-panel liquid-crystal display device according to claim 1, further comprising:

a common electrode on the thin-film transistor array substrate; and

a pixel electrode on each pixel area of the thin-film transistor array substrate and having a slit.

7. The touch-panel liquid-crystal display device according to claim 6, wherein the metal line is either a common line that supplies a common voltage to the common electrode, or a sensing line that senses a touch.

8. The touch-panel liquid-crystal display device according to claim 1, further comprising:

a pixel electrode and a common electrode both on each pixel area of the thin-film transistor array substrate.

9. The touch-panel liquid-crystal display device according to claim 8, wherein the metal line is either a common line that supplies a common voltage to the common electrode, or a sensing line that senses a touch.

10. The touch-panel liquid-crystal display device according to claim 3, wherein the push column spacer maintains a distance ranging from approximately 3 μ

m to approximately 6 μ

m from a cut portion of the metal line and the metal line, which is close thereto.