Resistance type touch display panel

• US 8,334,848 B2
• Filed: 05/30/2008
• Issued: 12/18/2012
• Est. Priority Date: 04/18/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Ma, Mei-Sheng, Lee, Hsin-Hung, Wu, Yuan-Chun, Cheng, Kuo-Hsing
• Primary Examiner(s): Nguyen, Chanh
• Assistant Examiner(s): Pham, Long D
• Application Number:
  US12/129,709
• Publication Number:
  US 20090262093A1
• Time in Patent Office: 1,663 Days
• Field of Search: 345/174, 345/173, 178/18.05
• 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 resistance type 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 resistance type touch unit is electrically connected with one of the scan lines and one of the data lines; and

each resistance type touch unit is distributed in at least two pixel regions, and each of the resistance type touch units comprises;

a touch signal readout circuit, comprising;

a thin-film transistor (TFT); and

a posterior circuit electrically connected with the TFT;

a touch pad electrically connected with the touch signal readout circuit, the TFT being electrically connected to the touch pad, wherein the posterior circuit is adapted for reading a voltage of the touch pad via the TFT, and the TFT is used for maintaining the voltage of the touch pad at a reference voltage after reading the voltage of the touch pad;

a storage capacitor disposed between the TFT and the touch pad, wherein the storage capacitor, the TFT, and the touch pad are located in different pixel regions, respectively; 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 resistance type touch units, and a gap is formed between the common electrode disposed on each touch protrusion and the resistance type touch unit.

2. The resistance type touch display panel according to claim 1, where in 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 the reference voltage is different from a voltage of the common electrode.

4. 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.

5. 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.

6. 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.

7. The resistance type touch display panel according to claim 6, 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 resistance type touch units.

8. The resistance type touch display panel according to claim 6, wherein the stage overlaps the scan line or the data line.

9. 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 the each touch unit comprises;

a touch signal readout circuit, comprising;

a thin-film transistor (TFT); and

a posterior circuit electrically connected with the TFT;

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

the TFT being electrically connected to the touch pad, wherein the posterior circuit is adapted for reading a voltage of the touch pad via the TFT, and the TFT is used for maintain the voltage of the touch pad at a reference voltage after reading the voltage of the touch pad;

a storage capacitor, disposed between the TFT and the touch pad, wherein the TFT, the storage capacitor and the touch pad are in different pixel regions respectively; 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.

10. The resistance type touch display panel according to claim 9, wherein the reference voltage is different from a voltage of the common electrode.

11. The resistance type touch display panel according to claim 9, wherein the second substrate further comprises a black matrix (BM), and the spacers are disposed on the BM.

12. The resistance type touch display panel according to claim 9, wherein the second substrate further comprises a black matrix (BM), and the common electrode covers the spacers, the touch protrusions and the BM.

13. The resistance type touch display panel according to claim 9, wherein the first substrate further comprises a stage, and the common electrode is in contact with the stage.

14. The resistance type touch display panel according to claim 13, 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.

15. The resistance type touch display panel according to claim 13, wherein the stage overlaps the scan line or the data line.

16. 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 the each touch unit comprises;

a touch signal readout circuit, comprising;

a single thin-film transistor (TFT); and

a posterior circuit electrically connected with the single TFT;

a touch pad electrically connected with the touch signal readout circuit, the single TFT being electrically connected to the touch pad, wherein the posterior circuit is adapted for reading a voltage of the touch pad via the single TFT, and the single TFT is used for maintaining the voltage of the touch pad at a reference voltage after reading the voltage of the touch pad;

a storage capacitor disposed between the single TFT and the touch pad, wherein the storage capacitor, the single TFT, and the touch pad are located in different pixel regions, respectively; 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, a gap is formed between the common electrode disposed on each touch protrusion and the touch unit.

17. The resistance type touch display panel according to claim 16, wherein the common electrode is adapted to get in contact with the corresponding touch pad.

18. The resistance type touch display panel according to claim 16, wherein the reference voltage is different from a voltage of the common electrode.

19. The resistance type touch display panel according to claim 16, wherein the second substrate further comprises a black matrix (BM), and the spacers are disposed on the BM.

20. The resistance type touch display panel according to claim 16, wherein the second substrate further comprises a black matrix (BM), and the common electrode covers the spacers, the touch protrusions and the BM.

21. The resistance type touch display panel according to claim 16, wherein the first substrate further comprises a stage, and the common electrode is in contact with the stage.

22. The resistance type touch display panel according to claim 21, 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.

23. The resistance type touch display panel according to claim 21, wherein the stage overlaps the scan line or the data line.

24. 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 each of the touch units comprises;

a touch signal readout circuit, comprising;

a thin-film transistor (TFT); and

a posterior circuit electrically connected with the TFT;

a touch pad electrically connected with the touch signal readout circuit, the TFT being electrically connected to the touch pad, wherein the posterior circuit is adapted for reading a voltage of the touch pad via the TFT, and the TFT is used for maintaining the voltage of the touch pad at a reference voltage after reading the voltage of the touch pad;

a storage capacitor, disposed between the TFT and the touch pad, wherein the storage capacitor, the TFT and the touch pad are located in different pixel regions, respectively; 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.

25. The resistance type touch display panel according to claim 24, wherein the reference voltage is different from a voltage of the common electrode.

26. The resistance type touch display panel according to claim 24, wherein the second substrate includes a black matrix (BM), and the spacers are disposed on the BM.

27. The resistance type touch display panel according to claim 24, wherein the second substrate includes a black matrix (BM), and the common electrode covers the spacers, the touch protrusions and the BM.

28. The resistance type touch display panel according to claim 24, wherein the first substrate further comprises a stage, and the common electrode is in contact with the stage.

29. The resistance type touch display panel according to claim 28, 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.

30. The resistance type touch display panel according to claim 28, wherein the stage overlaps the scan line or the data line.