Touch-sensing liquid crystal display panel and liquid crystal display

• US 8,928,598 B2
• Filed: 05/28/2010
• Issued: 01/06/2015
• Est. Priority Date: 06/12/2009
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Cheng, Tsung-Chin, Huang, Hong-Ji, Chen, Zeng-De, Lee, Seok-Lyul, Wu, Yue-Hung
• Primary Examiner(s): Leiby, Christopher E
• Application Number:
  US12/789,464
• Publication Number:
  US 20100315362A1
• Time in Patent Office: 1,684 Days
• Field of Search: 345/156, 345173-178, 349/56, 349/139, 349/143
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch-sensing liquid crystal display (LCD) panel including an active device array substrate, an opposite substrate, and a liquid crystal layer disposed therebetween is provided. The active device array substrate includes a first substrate, a pixel array, a plurality of touch-sensing pads, and an electric field shielding layer. The pixel array is disposed on the first substrate and includes a plurality of sub-pixels arranged in an array, a plurality of scan lines, and a plurality of data lines. The touch-sensing pads are disposed on the first substrate. The electric field shielding layer is disposed on the pixel array and arranged between sub-pixels adjacent to each other, and the electric field shielding layer includes a pattern. The opposite substrate includes a common electrode and a plurality of touch-sensing protrusions disposed above the touch-sensing pads. Therefore, when the touch-sensing LCD panel is pressed, press mura is substantially eliminated.

Claims

1. A touch-sensing LCD panel, comprising:

an active device array substrate comprising;

a first substrate;

a pixel array disposed on the first substrate, wherein the pixel array comprises a plurality of sub-pixels arranged in an array, a plurality of scan lines, and a plurality of data lines, each of the sub-pixels includes an active device and a pixel electrode electrically connected to the active device, and each of the pixel electrodes is overlapped with one of the adjacent scan lines;

a plurality of touch-sensing pads disposed on the first substrate;

an electric field shielding layer disposed on the pixel array and arranged between the pixel electrodes of the sub-pixels adjacent to each other for shielding electric fields of the adjacent sub-pixels, wherein the electric field shielding layer is disposed on the edge of the pixel electrode and on the edge of the adjacent pixel electrode, and wherein the electric field shielding layer is overlapping over only a portion of the scan line, wherein the electric field shielding layer includes a mesh pattern and a material for the electric field shielding layer is a dielectric material;

an opposite substrate comprising a common electrode and a plurality of touch-sensing protrusions disposed above the touch-sensing pads; and

a liquid crystal layer disposed between the active device array substrate and the opposite substrate.

2. The touch-sensing LCD panel as claimed in claim 1, wherein the scan lines and the data lines are intersected to define a plurality of sub-pixel regions, and each of the sub-pixels is respectively disposed in a sub-pixel region.

3. The touch-sensing LCD panel as claimed in claim 2, wherein the mesh pattern has a plurality of openings, and each of the openings respectively corresponds to one of the sub-pixel regions.

4. The touch-sensing LCD panel as claimed in claim 2, wherein the mesh pattern has a plurality of openings, and each of the openings respectively corresponds to at least two adjacent sub-pixel regions.

5. The touch-sensing LCD panel as claimed in claim 4, wherein the mesh pattern has a plurality of openings, and each of the openings respectively corresponds to the adjacent sub-pixel regions that have the same polarity.

6. The touch-sensing LCD panel as claimed in claim 1, wherein the mesh pattern of the electric shielding layer divides the pixel array into a plurality of regions, wherein each of the regions has at least one sub-pixel, and sub-pixels of adjacent regions have a different polarity from each other.

7. The touch-sensing LCD panel as claimed in claim 1, wherein each of the pixel electrodes is overlapped with one of the adjacent scan lines to form a storage capacitor.

8. A touch-sensing LCD panel, comprising:

an active device array substrate comprising;

a first substrate;

a pixel array disposed on the first substrate, wherein the pixel array comprises a plurality of sub-pixels arranged in an array, a plurality of scan lines, and a plurality of data lines, each of the sub-pixels includes an active device and a pixel electrode electrically connected to the active device, and each of the pixel electrodes is overlapped with one of the adjacent scan lines;

a plurality of touch-sensing pads disposed on the first substrate;

an electric field shielding layer disposed on the pixel array and arranged between the pixel electrodes of sub-pixels that are adjacent to each other for shielding electric fields of the adjacent sub-pixels, wherein the electric field shielding layer is disposed on the edge of the pixel electrode and on the edge of the adjacent pixel electrode, and wherein the electric field shielding layer is overlapping over only a portion of the scan line, wherein the electric field shielding layer has a plurality of strip patterns and a material for the electric field shielding layer is a dielectric material;

an opposite substrate comprising a common electrode and a plurality of touch-sensing protrusions disposed above the touch-sensing pads; and

a liquid crystal layer disposed between the active device array substrate and the opposite substrate.

9. The touch-sensing LCD panel as claimed in claim 8, wherein the scan lines and the data lines are intersected to define a plurality of sub-pixel regions, and each of the sub-pixels is respectively disposed in one of the sub-pixel regions.

10. The touch-sensing LCD panel as claimed in claim 8, wherein an extending direction of the strip patterns is parallel to an extending direction of the scan lines.

11. The touch-sensing LCD panel as claimed in claim 8, wherein an extending direction of the strip patterns is parallel to an extending direction of the data lines.

12. The touch-sensing LCD panel as claimed in claim 8, wherein the sub-pixels disposed between two adjacent strip patterns have the same polarity.

13. The touch-sensing LCD panel as claimed in claim 8, wherein the strip patterns of the electric shielding layer divides the pixel array into a plurality of regions, wherein each of the regions has at least one sub-pixel, and sub-pixels of adjacent regions have a different polarity from each other.

14. The touch-sensing LCD panel as claimed in claim 8, wherein each of the pixel electrodes is overlapped with one of the adjacent scan lines to form a storage capacitor.

15. An LCD panel, comprising:

an active device array substrate comprising;

a first substrate;

a pixel array disposed on the first substrate, wherein the pixel array comprises a plurality of sub-pixels arranged in an array, a plurality of scan lines, and a plurality of data lines, each of the sub-pixels includes an active device and a pixel electrode electrically connected to the active device, and each of the pixel electrodes is overlapped with one of the adjacent scan lines;

an electric field shielding layer disposed on the pixel array and arranged between the pixel electrodes of sub-pixels that are adjacent to each other for shielding electric fields of the adjacent sub-pixels, wherein the electric field shielding layer is disposed on the edge of the pixel electrode and on the edge of the adjacent pixel electrode, and wherein the electric field shielding layer is overlapping over only a portion of the scan line, wherein the electric field shielding layer has a pattern and a material for the electric field shielding layer is a dielectric material;

an opposite substrate comprising a common electrode; and

a liquid crystal layer disposed between the active device array substrate and the opposite substrate.

16. The LCD panel as claimed in claim 15, wherein the scan lines and the data lines are intersected to define a plurality of sub-pixel regions, and each of the sub-pixels is respectively disposed in one of the sub-pixel regions.

17. The LCD panel as claimed in claim 15, wherein the pattern of the electric shielding layer divides the pixel array into a plurality of regions, wherein each of the regions corresponds to at least one sub-pixel, and sub-pixels of adjacent regions have a different polarity from each other.

18. The LCD panel as claimed in claim 15, wherein the pattern of the electric field shielding layer includes a mesh pattern.

19. The LCD panel as claimed in claim 18, wherein the mesh pattern has a plurality of openings, and each of the openings respectively corresponds to at least two adjacent sub-pixel regions that have the same polarity.

20. The LCD panel as claimed in claim 15, wherein the pattern of the electric field shielding layer includes a plurality of strip patterns.

21. The LCD panel as claimed in claim 20, wherein an extending direction of the strip patterns is parallel to an extending direction of the scan lines.

22. The LCD panel as claimed in claim 20, wherein the sub-pixels disposed between two adjacent strip patterns have the same polarity.

23. The LCD panel as claimed in claim 15, further comprising a plurality of touch-sensing pads disposed on the first substrate and a plurality of touch-sensing protrusions disposed above the touch-sensing pads.

24. The LCD panel as claimed in claim 15, wherein each of the pixel electrodes is overlapped with one of the adjacent scan lines to form a storage capacitor.