RESISTANCE TYPE TOUCH DISPLAY PANEL

• US 20090262093A1
• Filed: 05/30/2008
• Published: 10/22/2009
• Est. Priority Date: 04/18/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wu, Yuan-Chun, Lee, Hsin-Hung, Ma, Mei-Sheng, Cheng, Kuo-Hsing
• Granted Patent: US 8,334,848 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistance type touch display panel includes a first substrate and a second substrate disposed above the first substrate. The first substrate includes many scan lines and data lines defining many pixel regions on the first substrate, many pixel units and touch units. Each pixel unit is located in one of the pixel regions and electrically connected with one of the scan lines and data lines respectively. Each touch unit is electrically connected with one of the scan lines and data lines and distributed in at least two pixel regions. The second substrate includes many spacers, many touch protrusions and a common electrode covering the spacers and the touch protrusions. Each touch protrusion is located above one of the touch units and a gap is formed between the common electrode disposed on each touch protrusion and the touch unit.

Claims

1. A resistance type touch display panel, comprising:

a first substrate comprising a plurality of scan lines, a plurality of data lines, a plurality of pixel units and a plurality of touch units disposed thereon, wherein the scan lines and the data lines define a plurality of pixel regions on the first substrate;

each pixel unit is located in one of the pixel regions and electrically connected with one of the scan lines and one of the data lines respectively;

each touch unit is electrically connected with one of the scan lines and one of the data lines; and

each touch unit is distributed in at least two pixel regions; and

a second substrate disposed above the first substrate, wherein the second substrate comprises a plurality of spacers, a plurality of touch protrusions and a common electrode formed thereon, and wherein the common electrode covers the spacers and the touch protrusions, each touch protrusion is located above one of the touch units, and a gap is formed between the common electrode disposed on each touch protrusion and the touch unit.

2. The resistance type touch display panel according to claim 1, wherein each of the pixel units comprises:

a first TFT electrically connected with one of the scan lines and one of the data lines; and

a pixel electrode electrically connected with the first TFT.

3. The resistance type touch display panel according to claim 1, wherein each of the touch units comprises:

a touch signal readout circuit; and

a touch pad electrically connected with the touch signal readout circuit.

4. The resistance type touch display panel according to claim 3, wherein the touch signal readout circuit comprises:

a second TFT electrically connected to the touch pad; and

a posterior circuit electrically connected with the second TFT, wherein the posterior circuit is adapted for reading a voltage of the touch pad via the second TFT, and maintaining the voltage of the touch pad at a reference voltage after reading the voltage of the touch pad.

5. The resistance type touch display panel according to claim 4, wherein the reference voltage is different from a voltage of the common electrode.

6. The resistance type touch display panel according to claim 1, wherein the second substrate includes a black matrix (BM), and the spacers are disposed on the BM.

7. The resistance type touch display panel according to claim 1, wherein the second substrate includes a black matrix (BM), and the common electrode covers the spacers, the touch protrusions and the BM.

8. The resistance type touch display panel according to claim 1, wherein the first substrate further comprises a stage, and the common electrode is in contact with the stage.

9. The resistance type touch display panel according to claim 8, wherein the common electrode which is in contact with the stage is electrically isolated from the scan lines, the data lines, the pixel units and the touch units.

10. The resistance type touch display panel according to claim 8, wherein the stage overlaps the scan line or the data line.