Touch Display Panel

• US 20110193794A1
• Filed: 07/26/2010
• Published: 08/11/2011
• Est. Priority Date: 02/10/2010
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hu, Jia-Wei, Wang, Chao-Chen, Chuang, Hsing-Jung, Fan, Fu-Cheng
• Application Number:
  US12/843,055
• Publication Number:
  US 20110193794A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A touch display panel includes a display panel, a second substrate, at least a first spacer and at least a touch sensing unit. The display panel includes a first substrate and a plurality of display units. The first substrate includes a display surface and a non-display surface, and the display units are disposed on the display surface. The second substrate is disposed opposite to the first substrate and is disposed on a side of the non-display surface of the first substrate. The first spacer is disposed between the first substrate and the second substrate to maintain a distance therebetween. The touch sensing unit includes a sensing conductive pad and a conductive unit, wherein a gap is disposed between the sensing conductive pad and the conductive unit.

Claims

1. A touch display panel, comprising:

a display panel, comprising a first substrate and a plurality of display units, wherein the first substrate comprises a display surface and a non-display surface, and the display units are disposed on the display surface of the first substrate;

a second substrate disposed opposite to the first substrate, wherein the second substrate is disposed on a side of the non-display surface of the first substrate;

at least a first spacer disposed between the first substrate and the second substrate to maintain a distance therebetween; and

at least a touch sensing unit disposed between the first substrate and the second substrate, wherein the touch sensing unit comprises;

a sensing conductive pad; and

a conductive unit disposed corresponding to the sensing conductive pad,

wherein a gap is disposed between the sensing conductive pad and the conductive unit.

2. The touch display panel of claim 1, wherein the sensing conductive pad is disposed on a side of the first substrate facing the second substrate, and the conductive unit is disposed on a side of the second substrate facing the first substrate.

3. The touch display panel of claim 1, wherein the sensing conductive pad is disposed on a side of the second substrate facing the first substrate, and the conductive unit is disposed on a side of the first substrate facing the second substrate.

4. The touch display panel of claim 1, wherein the conductive unit comprises a touch mound.

5. The touch display panel of claim 4, further comprising at least a second spacer disposed between the first substrate and the second substrate.

6. The touch display panel of claim 5, wherein the first spacer has a first height, the second spacer has a second height, and the touch mound has a third height.

7. The touch display panel of claim 6, wherein the first height is greater than the second height and the third height.

8. The touch display panel of claim 6, wherein the second height is substantially equal to the third height.

9. The touch display panel of claim 1, further comprising a sealant and a fluidic layer, wherein the first substrate and the second substrate is assembled by the sealant, and the fluidic layer is disposed among the first substrate, the second substrate and the sealant.

10. The touch display panel of claim 4, wherein the conductive unit further comprises a conductive layer disposed on a side of the touch mound facing the sensing conductive pad.

11. The touch display panel of claim 10, wherein the conductive layer is connected to a common voltage.

12. The touch display panel of claim 4, wherein the touch mound comprises a conductive material.

13. The touch display panel of claim 12, wherein the touch mound is connected to a common voltage.

14. The touch display panel of claim 1, wherein the first spacer comprises an elastic material.

15. The touch display panel of claim 1, wherein the conductive unit is configured to contact the sensing conductive pad when an external force is applied to the display panel.

16. The touch display panel of claim 1, wherein the gap between the conductive unit and the sensing conductive pad is reduced when an external force is applied to the display panel.

17. The touch display panel of claim 1, further comprising a signal read-out device, wherein the sensing conductive pad is electrically connected to the signal read-out device.

18. The touch display panel of claim 17, further comprising a scan line and a read-out line, wherein the signal read-out device comprises a gate, a source and a drain, the source is electrically connected to the sensing conductive pad, the gate is electrically connected to the scan line, and the drain is electrically connected to the read-out line.

19. The touch display panel of claim 1, wherein the display panel comprises a flexible display panel, a TFT-LCD display panel, an organic electroluminescence display panel, a reflective liquid-crystal display device or an electrophoretic display panel.