Capacitance type touch panel

• US 7,924,350 B2
• Filed: 10/12/2007
• Issued: 04/12/2011
• Est. Priority Date: 10/12/2007
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wu, Yuan-Chun, Chang, Meng-Hsiang, Ma, Mei-Sheng, Cheng, Kuo-Hsing, Lee, Hsin-Hung
• Primary Examiner(s): Nguyen; Dung T.
• Application Number:
  US11/871,559
• Publication Number:
  US 20090096760A1
• Time in Patent Office: 1,278 Days
• Field of Search: 349/12, 345/173
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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

The present invention relates to a liquid crystal display (LCD). The LCD includes a plurality of display units formed with a first substrate, a color matrix formed on the first substrate, and a common electrode formed on the color matrix, a second substrate spaced from the first substrate, a pixel electrode matrix formed on the second substrate, a liquid crystal material disposed between the common electrode and the pixel electrode matrix. The LCD includes a touch sensing member integrated onto the color matrix of the first substrate.

Claims

1. A liquid crystal display (LCD), comprising:

a first substrate;

a first coordinate detecting layer having a plurality of X electrodes and a plurality of first connection lines, the X electrodes being parallel to each other and regular-spacingly formed on the first substrate along an X-direction, and the X electrodes being connected by the first connection lines therebetween;

an insulating layer formed on the first coordinate detecting electrode layer;

a second coordinate detecting layer having a plurality of Y electrodes and a plurality of second connection lines with a plurality of openings, the Y electrodes being parallel to each other and regular-spacingly formed on the insulating layer along a Y-direction that is substantially perpendicular to the X-direction, the Y electrodes being connected by the second connection lines therebetween, each of the plurality of X electrodes and the plurality of Y electrodes being formed of a non-transparent, conductive material, the X electrodes and the Y electrodes being not overlapped, the first connection lines and the second connection lines being overlapped and insulated by the insulating layer, wherein the first coordinate detecting layer, the insulating layer and the second coordinate detecting layer define a plurality of openings exposing the first substrate, and the plurality of X electrodes, the plurality of Y electrodes, the first connection lines and the second connection lines are configured to be a black matrix with the openings;

a color filtering matrix having a plurality of color pads, each color pad formed in one of the plurality of openings correspondingly;

a transparent overcoat layer formed on the color filtering matrix, the insulating layer and the plurality of Y electrodes;

a second substrate spaced from the first substrate;

a pixel layer having a plurality of pixel electrodes and a plurality of semiconductor devices formed on the second substrate; and

a liquid crystal material disposed between the common electrode and the pixel layer.

2. The LCD of claim 1, wherein each of the first substrate and the second substrate is formed of a transparent material.

3. The LCD of claim 1, wherein the insulating layer is formed of a non-conductive material.

4. The LCD of claim 1, wherein each of the plurality of semiconductor devices comprises a thin film transistor (TFT), electrically coupled to a corresponding pixel electrode.

5. The LCD of claim 1, wherein the first substrate and the second substrate are aligned such that each color pad on the first substrate is positioned opposite a pixel electrode correspondingly on the second substrate.

6. The LCD of claim 1, wherein each of the plurality of X electrodes and the plurality of Y electrodes is associated with coordinates of the first substrate at which the electrode is located.

7. The LCD of claim 1, wherein when the first substrate is touched, the touch location at the first substrate is detectable by measuring a signal generated responsively by one or more of the plurality of X electrodes and the plurality of Y electrodes at the touch location.

8. The LCD of claim 1, further comprising a common electrode formed on the transparent overcoat layer.

9. The LCD of claim 8, wherein the common electrode is formed of a layer of a transparent, conductive material.

10. The LCD of claim 1, wherein when the first substrate is touched, the touch location at the first substrate is detectable by measuring a signal generated responsively by one or more of the plurality of X electrodes and the plurality of Y electrodes at the touch location.

11. A liquid crystal display (LCD), comprising:

a first substrate having a first surface and a second surface opposite to the first surface;

a touching sensing member formed on the second surface of the first substrate, the touch sensing member comprising a plurality of X electrodes, a plurality of Y electrodes, a plurality of first connection lines, a plurality of second connection lines and an insulating layer, the X electrodes being parallel to each other and regular-spacingly aligned along the X-direction, the X electrodes being connected by the first connection lines therebetween, the plurality of Y electrodes being parallel to each other and regular-spacingly aligned along the Y-direction, the Y electrodes being connected by the second connection lines therebetween, the X electrodes and the Y electrodes being not overlapped, the first connection lines and the second connection lines being overlapped, the insulating layer being formed between the first connection lines and the second connection lines, each of the plurality of X electrodes and the plurality of Y electrodes being formed of a non-transparent, conductive material, wherein the first coordinate detecting layer, the insulating layer and the second coordinate detecting layer define a plurality of openings exposing the first substrate;

a color filtering layer formed on the first surface of the first substrate, the color filtering layer being patterned in the form of a color matrix having a plurality of color pads, each of the color pads being aligned to one of the plurality of openings correspondingly;

a transparent overcoat layer formed on the color filtering layer;

a second substrate spaced from the first substrate and facing to the first surface of the first substrate;

a pixel electrode layer formed on the second substrate; and

a liquid crystal material disposed between the common electrode and the pixel electrode layer.

12. The LCD of claim 11, wherein the insulating layer is formed of a non-conductive material.

13. The LCD of claim 11, wherein the touch sensing member further comprises an overcoat layer formed over the plurality of X electrodes and the plurality of Y electrodes.

14. The LCD of claim 11, further comprising a black matrix interleaved with the plurality of color pads.

15. The LCD of claim 11, wherein each of the first substrate and the second substrate is formed of a transparent material.

16. The LCD of claim 11, wherein the insulating layer is formed of a non-conductive material.

17. The LCD of claim 11, further comprises a common electrode formed on the transparent overcoat layer.

18. The LCD of claim 17, wherein the common electrode is formed of a layer of a transparent, conductive material.

19. The LCD of claim 11, wherein when the first substrate is touched, the touch location at the first substrate is detectable by measuring a signal generated responsively by one or more of the plurality of X electrodes and the plurality of Y electrodes at the touch location.