TOUCH CONTROL LIQUID CRYSTAL DISPLAY DEVICE

• US 20140168540A1
• Filed: 12/10/2013
• Published: 06/19/2014
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: WANG, Lihua, MA, Conghua, YAO, Qijun, MA, Jun
• Granted Patent: US 9,091,874 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

One inventive aspect is a touch control liquid crystal display device. The device includes a color film substrate, a thin film transistor array substrate, and a liquid crystal layer between the color film substrate and the thin film transistor array substrate. The color film substrate includes a grid-shaped black matrix layer, a touch control layer, and a color film layer. The touch control layer includes metal grid electrodes in a rectangle, where the metal grid electrodes include metal lines intersecting transversely and vertically. In addition, the metal grid electrodes include drive electrodes and sense electrodes. The drive electrodes are connected together through first metal connection lines in a first direction, and the sense electrodes are connected together through second metal connection lines in a second direction. In addition, the projection of the metal grid electrodes falls into the projection of the black matrix layer in the light transmission direction.

Claims

1. A touch control liquid crystal display device, comprising:

a color film substrate;

a thin film transistor array substrate; and

a liquid crystal layer arranged between the color film substrate and the thin film transistor array substrate,

wherein the color film substrate comprises;

a grid-shaped black matrix layer,

a touch control layer, and

a color film layer;

wherein the touch control layer comprises;

a plurality of metal grid electrodes arranged in a rectangle, wherein the metal grid electrodes comprise a plurality of metal lines intersecting transversely and vertically, and the metal grid electrodes comprise a plurality of drive electrodes and a plurality of sense electrodes, and wherein the plurality of drive electrodes are connected together through a plurality of first metal connection lines in a first direction, and the plurality of sense electrodes are connected together through a plurality of second metal connection lines in a second direction, and

wherein the projection of the metal grid electrodes falls into the projection of the black matrix layer in the light transmission direction.

2. The touch control liquid crystal display device according to claim 1, wherein the touch control layer comprises a multi-layer structure comprising a first metal layer, a second metal layer, and an insulation layer arranged between the first metal layer and the second metal layer.

3. The touch control liquid crystal display device according to claim 2, wherein the plurality of drive electrodes, the plurality of sense electrodes, and the plurality of first metal connection lines are formed in the first metal layer, and wherein the plurality of second metal connection lines are formed in the second metal layer.

4. The touch control liquid crystal display device according to claim 2, wherein the plurality of drive electrodes, the plurality of sense electrodes, and the plurality of second metal connection lines are formed in the first metal layer, and wherein the plurality of first metal connection lines are formed in the second metal layer.

5. The touch control liquid crystal display device according to claim 2, wherein the plurality of drive electrodes and the plurality of first metal connection lines are formed in the first metal layer, and wherein the plurality of sense electrodes and the plurality of second metal connection lines are formed in the second metal layer.

6. The touch control liquid crystal display device according to claim 2, wherein the plurality of sense electrodes and the plurality of second metal connection lines are formed in the first metal layer, and wherein the plurality of drive electrodes and the plurality of first metal connection lines are formed in the second metal layer.

7. The touch control liquid crystal display device according to claim 1, wherein the shape of the outline of the metal grid electrodes is a square, a triangle, a diamond or another regular shape.

8. The touch control liquid crystal display device according to claim 1, wherein the side length of the metal grid electrodes is between about 50 μ

m and 150 μ

m.

9. The touch control liquid crystal display device according to claim 1, wherein the line width of the metal grid electrodes is less than the line width of a grid of the black matrix layer.

10. The touch control liquid crystal display device according to claim 1, wherein the line width of the metal lines in the metal grid electrodes is between about 2 μ

m and 7 μ

m.

11. The touch control liquid crystal display device according to claim 1, wherein the material of the black matrix layer is a resin material with a resistance above 107Ω

.

12. The touch control liquid crystal display device according to claim 1, further comprising a planar layer below the color film layer.

13. The touch control liquid crystal display device according to claim 12, wherein the thickness of the planar layer is between about 1 μ

m and 5 μ

m.

14. The touch control liquid crystal display device according to claim 1, wherein the protection of the first metal connection lines or the second metal connection lines falls into the protection of the black matrix layer in the light transmission direction.

15. The touch control liquid crystal display device according to claim 14, wherein the first metal connection lines or the second metal connection lines comprises a plurality of metal lines intersecting transversely and vertically, or

the first metal connection lines or the second metal connection lines comprise a plurality of transverse metal lines, or

the first metal connection lines or the second metal connection lines comprise a plurality of vertical metal lines.