LIQUID CRYSTAL DISPLAY TOUCH PANEL

• US 20110075059A1
• Filed: 09/24/2010
• Published: 03/31/2011
• Est. Priority Date: 09/30/2009
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Chi Mei Innolux Corporation (InnoLux Corporation)
• Inventors: SHIH, PO-SHENG, CHENG, JIA-SHYONG
• Application Number:
  US12/889,430
• Publication Number:
  US 20110075059A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio
• 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

An exemplary integrated LCD touch panel includes a first substrate, a second substrate, a liquid crystal layer and a driving control module. The first substrate includes scan lines, data lines, and contact sensor modules. Each sensor module comprises a sensor readout line, a readout transistor electrically connected to the sensor readout line and the scan line, and a contact electrode electrically connected to the readout transistor. The second substrate includes protrusions at a surface of the second substrate which faces toward the first substrate and positioned opposite to the contact electrode respectively. The liquid crystal layer is sandwiched between the first substrate and the second substrate. The driving control module is electrically connected to the readout lines and the data lines.

Claims

1. An integrated liquid crystal display (LCD) touch panel, comprising:

a first substrate comprising;

a plurality of scan lines;

a plurality of data lines; and

a plurality of contact sensor modules, each comprising;

a sensor readout line parallel to a corresponding data line;

a readout transistor electrically connected to the sensor readout line and a corresponding scan line; and

a contact electrode electrically connected to the readout transistor;

a second substrate parallel to the first substrate, comprising;

a plurality of protrusions at a surface of the second substrate which faces toward the first substrate, the protrusions positioned opposite to the contact electrodes, respectively;

a liquid crystal layer sandwiched between the first substrate and the second substrate; and

a driving control module electrically connected to the sensor readout lines and the data lines, wherein each of the readout transistors is in a readout state when the readout transistor receives an input voltage from the adjacent scan line; and

when the second substrate is elastically deformed one of the protrusions electrically contacts the corresponding contact electrode and the readout transistor receives a voltage signal from the contact electrode such that the readout transistor is activated and sends a sensing signal to the driving control module, which detects the position of the contacted readout transistor via the adjacent scan line and the corresponding sensor readout line.

2. The integrated LCD touch panel of claim 1, wherein the scan lines are arranged at a surface of the first substrate facing to the second substrate and are parallel to each other and evenly spaced from each other.

3. The integrated LCD touch panel of claim 2, wherein the data lines are parallel to each other and evenly spaced from each other, wherein the scan lines intersect with the data lines and cooperatively define a plurality of sub-pixel areas.

4. The integrated LCD touch panel of claim 3, wherein each contact sensor module is located in the vicinity of a corresponding intersection of the scan lines and the data lines.

5. The integrated LCD touch panel of claim 3, wherein the first substrate further comprises a plurality of sub-pixel driving control modules in the corresponding sub-pixel areas.

6. The integrated LCD touch panel of claim 5, wherein each sub-pixel driving control module comprises a display control transistor electrically connected to the corresponding scan line and the corresponding data line and a sub-pixel electrode electrically connect to the display control transistor.

7. The integrated LCD touch panel of claim 5, wherein each sub-pixel driving control module further comprises a driving control chip electrically connected to the scan line and the data line, wherein the driving control chip controls an on-off status of the display control transistor and a voltage of the sub-pixel electrode.

8. The integrated LCD touch panel of claim 1, wherein the readout transistor is a metal-oxide semiconductor field effect transistor.

9. The integrated LCD touch panel of claim 8, wherein the readout transistor comprises a gate electrode electrically connected to the corresponding scan line, a source electrode electrically connected to the sensor readout line and a drain electrode electrically connected to the contact electrode.

10. The integrated LCD touch panel of claim 9, wherein the readout transistor further comprises a protection layer covering the drain electrode and defining a through hole to partially receive the contact electrode.

11. The integrated LCD touch panel of claim 8, wherein the readout transistor comprises a gate electrode electrically connected to the contact electrode, a source electrode electrically connected to the sensor readout line, and a drain electrode electrically connected to the corresponding scan line.

12. The integrated LCD touch panel of claim 11, wherein the readout transistor further comprises an oxidation layer covering the gate electrode, wherein the oxidation layer defines a through hole to partially receive the contact electrode.

13. The integrated LCD touch panel of claim 1, wherein the second substrate further comprises a color filter layer on a surface of the second substrate thereof, on which the protrusions are formed.

14. The integrated LCD touch panel of claim 13, wherein the color filter layer consists of a plurality of red, green and blue filter units.

15. The integrated LCD touch panel of claim 13, wherein the second substrate further comprises a common electrode plated on a surface of the color filter layer and the protrusions.

16. An integrated liquid crystal display (LCD) touch panel, comprising:

a thin film transistor (TFT) substrate comprising;

a plurality of parallel scan lines;

a plurality of parallel data lines, the scan lines and the data lines cooperatively define a plurality of sub-pixel areas;

a plurality of sensor readout lines adjacent and parallel to the data lines, respectively; and

a plurality of contact sensor modules disposed in the sub-pixel areas, respectively, each contact sensor module comprising;

a readout transistor electrically connected to a corresponding adjacent sensor readout line and a corresponding adjacent scan line; and

a contact electrode electrically connected to the readout transistor;

a color filter (CF) substrate parallel to the TFT substrate, the CF substrate comprising;

a plurality of protrusions at an inner surface of the CF substrate, the protrusions positioned opposite to the contact electrodes, respectively;

a liquid crystal layer sandwiched between the TFT substrate and the CF substrate; and

a driving control module electrically connected to the sensor readout lines and the data lines, wherein each of the readout transistors is in a readout state when the readout transistor receives an input voltage from the adjacent scan line; and

when an outside of the second substrate is pressed inward one of the protrusions electrically contacts the corresponding contact electrode and the readout transistor receives a voltage signal from the contact electrode such that the readout transistor is activated and sends a sensing signal to the driving control module, which detects the position of the contacted readout transistor via the adjacent scan line and the corresponding sensor readout line.

17. The integrated LCD touch panel of claim 16, wherein the readout transistor is a metal-oxide semiconductor field effect transistor.

18. The integrated LCD touch panel of claim 17, wherein the readout transistor comprises a gate electrode electrically connected to the corresponding scan line, a source electrode electrically connected to the sensor readout line and a drain electrode electrically connected to the contact electrode.

19. The integrated LCD touch panel of claim 18, wherein the readout transistor further comprises a protection layer covering the drain electrode and defining a through hole to partially receive the contact electrode.

20. The integrated LCD touch panel of claim 17, wherein the readout transistor comprises a gate electrode electrically connected to the contact electrode, a source electrode electrically connected to the sensor readout line, and a drain electrode electrically connected to the corresponding scan line.