Touch display panel and touch sensing unit thereof

• US 8,570,285 B2
• Filed: 02/05/2010
• Issued: 10/29/2013
• Est. Priority Date: 10/23/2009
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lee, Hsin-Hung, Chen, Pei-Yu, Chiu, Yu-Mei, Chang, Wei-Jen, Lin, Yu-Chuan, Cheng, Kuo-Hsing
• Primary Examiner(s): Boddie, William
• Assistant Examiner(s): Okebato, Sahlu
• Application Number:
  US12/700,737
• Publication Number:
  US 20110096018A1
• Time in Patent Office: 1,362 Days
• Field of Search: 345/173
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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

A touch display panel includes a display panel and a touch sensing unit. The touch sensing unit includes first sensing series, and second sensing series. Each of the first sensing series includes a plurality of first transparent sensing pads disposed along a first direction, and a plurality of non-transparent bridge lines disposed along the first direction. Each of the non-transparent bridge lines is disposed between two adjacent first transparent sensing pads, overlapping with two adjacent first transparent sensing pads, and electrically connected to two adjacent first transparent sensing pads. The line width of each non-transparent bridge line is substantially between 0.5 micrometers and 10 micrometers, and the reduction of aperture ratio in a pixel region of the touch display panel caused by the non-transparent bridge lines is substantially between 0.1% and 5%.

Claims

1. A touch display panel, comprising:

a display panel, comprising a plurality of pixel region;

a plurality of color filters disposed on the display panel; and

a touch sensing unit, disposed on the display panel, the touch sensing unit comprising;

a plurality of first sensing series disposed on the display panel, wherein each of the first sensing series comprises;

a plurality of first transparent sensing pads disposed on the display panel along a first direction; and

a plurality of non-transparent bridge lines disposed on the display panel along the first direction, each of the non-transparent bridge lines being respectively disposed between two adjacent first transparent sensing pads, each of the non-transparent bridge lines partially overlapping with two adjacent first transparent sensing pads, and each of the non-transparent bridge lines being electrically connected to two adjacent first transparent sensing pads, wherein a line width of each of the non-transparent bridge lines is substantially between 0.5 micrometers and 10 micrometers and an aperture ratio of the pixel region occupied by the non-transparent bridge lines is substantially between 0.1% and 5%; and

a plurality of second sensing series disposed on the display panel along a second direction,

wherein each of the color filters has a long axis and is located corresponding to one of the pixel regions, each of the non-transparent bridge lines and a part of the color filters partially overlap in a perpendicular projection direction, and each of the non-transparent bridge lines and the long axis of each of the color filters are disposed in a non-parallel manner with each other.

2. The touch display panel of claim 1, wherein each of the second sensing series comprises a plurality of second transparent sensing pads disposed along the second direction on the display panel, and a plurality of transparent bridge lines disposed along the second direction on the display panel.

3. The touch display panel of claim 2, wherein the touch sensing unit further comprises a plurality of patterned insulating layers disposed between each of the second transparent sensing pads and each of the non-transparent bridge lines, and between each of the transparent bridge lines and each of the non-transparent bridge lines.

4. The touch display panel of claim 3, wherein a part of each of the second transparent sensing pads and each of the patterned insulating layers are disposed on each of the non-transparent bridge lines, and a part of each of the transparent bridge lines is disposed on each of the patterned insulating layers.

5. The touch display panel of claim 4, wherein each of the patterned insulating layers further comprises an extended insulating portion, and each of the extended insulating portions, each of the non-transparent bridge lines, and each of the first transparent sensing pads partially overlap with one another.

6. The touch display panel of claim 1, wherein the non-transparent bridge lines comprise metallic bridge lines.

7. The touch display panel of claim 1, wherein each of the non-transparent bridge lines is disposed substantially perpendicularly to the long axis of each of the color filters.

8. A touch sensing unit applicable to a touch display panel, the touch display panel comprising a plurality pixel regions and a plurality of color filters disposed on the display panel, each of the color filters having a long axis and being located corresponding to one of the pixel regions, the touch sensing unit comprising:

a plurality of first sensing series disposed on the touch display panel, wherein each of the first sensing series comprises;

a plurality of first transparent sensing pads disposed along a first direction;

a plurality of non-transparent bridge lines disposed along the first direction, each of the non-transparent bridge lines being respectively disposed between two adjacent first transparent sensing pads, each of the non-transparent bridge lines partially overlapping with two adjacent first transparent sensing pads, and each of the non-transparent bridge lines being electrically connected to two adjacent first transparent sensing pads, wherein a line width of each of the non-transparent bridge lines is substantially between 0.5 micrometers and 10 micrometers, and an aperture ratio of the pixel region occupied by the non-transparent bridge lines is substantially between 0.1% and 5%; and

a plurality of second sensing series disposed on the touch display panel along a second direction,

wherein each of the non-transparent bridge lines and a part of the color filters partially overlap in a perpendicular projection direction, and each of the non-transparent bridge lines and the long axis of each of the color filters are disposed in a non-parallel manner with each other.

9. The touch sensing unit of claim 8, further comprising a plurality of second transparent sensing pads disposed along the second direction.

10. The touch sensing unit of claim 9, further comprising a plurality of patterned insulating layers disposed between each of the second transparent sensing pads and each of the non-transparent bridge lines.

11. The touch sensing unit of claim 10, wherein each of the patterned insulating layers is disposed on each of the non-transparent bridge lines, and each of the second transparent sensing pads is disposed on each of the patterned insulating layers.

12. The touch sensing unit of claim 11, wherein each of the patterned insulating layers further comprises an extended insulating portion, and each of the extended insulating portions, each of the non-transparent bridge lines and each of the first transparent sensing pads partially overlap with one another.

13. The touch sensing unit of claim 8, wherein the non-transparent bridge lines comprise metallic bridge lines.

14. The touch sensing unit of claim 8, wherein each of the non-transparent bridge lines is disposed substantially perpendicularly to the long axis of each of the color filters.