TOUCH PANEL DISPLAY DEVICE

• US 20110018839A1
• Filed: 07/21/2010
• Published: 01/27/2011
• Est. Priority Date: 07/24/2009
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: SHIH, PO-SHENG, CHENG, JIA-SHYONG
• Application Number:
  US12/840,300
• Publication Number:
  US 20110018839A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel display device includes an upper substrate and a lower substrate opposite to the upper substrate. The lower substrate includes scan lines, data lines intersecting with the data lines and contact sensor modules. Each contact sensor module includes a readout line spaced from the data lines, a readout component, and a contact detection module. The readout component includes two ports connected to the readout line and the scan line, respectively; and an equivalent resistance of the readout component is changed according to an electrical field formed between the common electrode and the readout component, such that an output voltage or an output current of the readout line is changed. The contact detection module detects a contact position via a position of the readout line of which the voltage or the current has been changed and a position of the scanned scan line.

Claims

1. A touch panel display device, comprising:

an upper substrate comprising a common electrode; and

a lower substrate opposite to the upper substrate, the lower substrate comprising a plurality of scan lines, a plurality of data lines intersecting with the plurality of scan lines, and a plurality of contact sensor modules, each contact sensor module comprising;

a readout line spaced from the data lines;

a readout component disposed on an intersection of the readout line and the adjacent scan line, wherein the readout component includes two ports electrically connected to the readout line and the adjacent scan line, respectively, and an equivalent resistance of the readout component changes according to an electrical field formed between the common electrode and the readout component, such that an output voltage or an output current of the adjacent readout line is changed; and

a contact detection module electrically connected to the readout lines and detecting a contact position via a position of the readout line of which the output voltage or the output current has been changed and a position of the scanned scan line.

2. The touch panel display device of claim 1, wherein the readout component comprises a sensor layer made of an amorphous silicon material.

3. The touch panel display device of claim 2, wherein the readout component further comprises two connecting members, and the two ports of the readout component are connected to the adjacent readout line and the adjacent scan line via the connecting members, respectively.

4. The touch panel display device of claim 2, wherein the contact sensor module further comprises a light shielding layer disposed below the sensor layer.

5. The touch panel display device of claim 4, wherein the readout assembly further comprises two ohmic contact layers, manufactured by a doping process and interconnecting the connecting members and the sensor layer.

6. The touch panel display device of claim 2, further comprising a plurality of contact switch transistors disposed on a plurality of intersections of the scan lines and the readout lines.

7. The touch panel display device of claim 2, further comprising a black matrix disposed opposite to the sensor layer.

8. A touch panel display device, comprising:

an upper substrate comprising a common electrode; and

a lower substrate opposite to the upper substrate, the lower substrate comprising a plurality of scan lines, a plurality of data lines intersecting with the plurality of scan lines, and a plurality of contact sensor modules, each contact sensor module comprising;

a readout line spaced from the data lines;

a contact switch transistor comprising a drain electrode, a source electrode, and a gate electrode, wherein the source electrode is electrically connected to the adjacent readout line and the gate electrode is electrically connected to the adjacent scan line;

a readout component disposed on an intersection of the readout line and the adjacent scan line, wherein the readout component comprises two ports electrically connected to the readout line and the adjacent scan line respectively, and an equivalent resistance of the readout component is changed according to an electrical field formed between the common electrode and the readout component, such that an output voltage or an output current of the adjacent readout line is changed; and

a contact detection module electrically connected to the readout lines and detecting a contact position via a position of the readout line of which the output voltage or the output current has been changed and a position of the scanned scan line.

9. The touch panel display device of claim 8, wherein one of the two ports of the readout component is electrically connected to the adjacent scan line and a readout voltage of the readout component is provided by the adjacent scan line correspondingly.

10. The touch panel display device of claim 9, wherein the readout component comprises a sensor layer made of an amorphous silicon material.

11. The touch panel display device of claim 10, wherein the contact sensor module further comprises a light shielding layer disposed below the sensor layer.

12. The touch panel display device of claim 10, further comprising a black matrix disposed opposite to the sensor layer.

13. The touch panel display device of claim 8, wherein one of the two ports of the readout component is electrically connected to a power source, and the power source provides a readout voltage to the readout component.