Touch display panel

• US 8,054,297 B2
• Filed: 12/19/2008
• Issued: 11/08/2011
• Est. Priority Date: 10/29/2008
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Huang, Kuei-Wei
• Primary Examiner(s): Tzeng; Fred
• Application Number:
  US12/339,079
• Publication Number:
  US 20100103119A1
• Time in Patent Office: 1,054 Days
• Field of Search: 345/173, 345/104, 345/156, 349/12, 349/155, 349/139
• US Class Current: 345/173
• 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

Abstract

A touch display panel includes a first substrate, a second substrate, a third substrate, a liquid crystal layer disposed between the second and the third substrates, a pixel array disposed between the liquid crystal layer and the third substrate, an opposite electrode, color filter patterns, a first sensing electrode, and a second sensing electrode. The first, the second, and the third substrates are disposed in parallel. The color filter patterns and the opposite electrode that are disposed between the liquid crystal layer and the second substrate are respectively disposed on opposite sides of the second substrate. Some color filter patterns are piled to form touch points. The first sensing electrode on the first substrate faces the second substrate. The second sensing electrode covers the touch points and some color filter patterns. A height of the touch points is less than a gap between the first and the second substrates.

Claims

1. A touch display panel, comprising:

a first substrate;

a second substrate;

a third substrate, wherein the first substrate, the second substrate, and the third substrate are disposed in parallel, and the second substrate is disposed between the first substrate and the third substrate;

a liquid crystal layer, disposed between the second substrate and the third substrate;

a pixel array, disposed between the liquid crystal layer and the third substrate;

an opposite electrode, disposed between the second substrate and the liquid crystal layer;

a plurality of color filter patterns, wherein the plurality of color filter patterns and the opposite electrode are respectively disposed on opposite sides of the second substrate, and parts of the plurality of color filter patterns are piled to form a plurality of touch points;

a first sensing electrode, disposed on the first substrate and facing the second substrate; and

a second sensing electrode, covering the plurality of touch points and parts of the plurality of color filter patterns, wherein a height of the plurality of touch points is less than a gap between the first substrate and the second substrate.

2. The touch display panel as claimed in claim 1, wherein parts of the plurality of color filter patterns are further piled to form a plurality of spacers exposed by the second sensing electrode, and the plurality of spacers allows the gap to exist between the first substrate and the second substrate.

3. The touch display panel as claimed in claim 2, further comprising a black matrix pattern disposed on one side of the second substrate facing the first substrate, the black matrix pattern comprising a plurality of openings, wherein parts of the plurality of color filter patterns which are not piled are located in the plurality of openings, and the plurality of touch points and the plurality of spacers are disposed on the black matrix pattern.

4. The touch display panel as claimed in claim 2, wherein a height of the plurality of spacers is greater than the height of the plurality of touch points.

5. The touch display panel as claimed in claim 2, wherein the plurality of color filter patterns comprises a plurality of red filter patterns, a plurality of green filter patterns, and a plurality of blue filter patterns.

6. The touch display panel as claimed in claim 5, wherein parts of the plurality of touch points are formed by piling one of the plurality of red filter patterns and one of the plurality of green filter patterns.

7. The touch display panel as claimed in claim 5, wherein parts of the plurality of touch points are formed by piling one of the plurality of blue filter patterns and one of the plurality of green filter patterns.

8. The touch display panel as claimed in claim 5, wherein parts of the plurality of touch points are formed by piling one of the plurality of red filter patterns and one of the plurality of blue filter patterns.

9. The touch display panel as claimed in claim 5, wherein each of the plurality of spacers is formed by piling one of the plurality of red filter patterns, one of the plurality of green filter patterns, and one of the plurality of blue filter patterns.

10. The touch display panel as claimed in claim 1, further comprising a plurality of cell spacers disposed between the second substrate and the third substrate, the plurality of cell spacers allowing a cell gap to exist between the second substrate and the third substrate.

11. The touch display panel as claimed in claim 10, wherein the plurality of cell spacers is a plurality of ball-shaped spacers or a plurality of photoresist spacers.

12. The touch display panel as claimed in claim 1, wherein the first substrate, the second substrate, and the third substrate are transparent substrates, respectively.

13. The touch display panel as claimed in claim 1, wherein the first substrate is a flexible transparent substrate.