TOUCH PANEL DISPLAY AND METHOD OF MANUFACTURING THE SAME

• US 20090237369A1
• Filed: 01/21/2009
• Published: 09/24/2009
• Est. Priority Date: 03/19/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Shin, Jae-Yong, Kang, Hyun-Ho, Hong, Kweon-Sam, Hur, Seung-Hyun, Choi, Sang-Gun
• Granted Patent: US 8,179,482 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A display having a touch panel capability is provided. The display includes a first substrate and a second substrate opposing each other, a thin-film transistor for pixel driving formed on the first substrate, and a thin-film transistor for touch position detection including a source electrode and a drain electrode formed on the first substrate, and a gate electrode formed on the second substrate.

Claims

1. A display comprising:

a first substrate and a second substrate opposing each other;

a thin-film transistor for pixel driving formed on the first substrate; and

a thin-film transistor for touch position detection including a source electrode and a drain electrode formed on the first substrate, and a gate electrode formed on the second substrate.

2. The display of claim 1, wherein the first substrate further comprises:

a gate line formed along one direction of the first substrate;

a first sensing line formed along the same direction as and spaced apart from the gate line;

a data line formed along another direction intersecting and insulated from the gate line; and

a second sensing line formed along the same direction as and spaced apart from the data line.

3. The display of claim 2, wherein the second sensing line is formed corresponding to at least each unit pixel.

4. The display of claim 2, wherein the thin-film transistor for touch position detection comprises at least two thin-film transistors that use the gate electrode and the source electrode in common and has at least two of the drain electrodes.

5. The display of claim 4, wherein the source electrode is connected to the gate line, and the drain electrodes are connected respectively to the first and second sensing lines.

6. The display of claim 5, further comprising first and second sensing electrodes formed spaced apart in a region where the first and second sensing lines intersect.

7. The display of claim 6, wherein the source electrode is formed extending from the first sensing electrode, and the drain electrodes are formed extending respectively from the second sensing line and the second sensing electrode.

8. The display of claim 7, further comprising:

a first connecting electrode which interconnects the first sensing electrode and the gate line; and

a second connecting electrode which interconnects the second sensing electrode and the first sensing line.

9. The display of claim 7, wherein the source electrode is formed in a bent configuration.

10. The display of claim 4, wherein the source electrode is connected to the data line, and the drain electrodes are connected respectively to the first and second sensing lines.

11. The display of claim 2, further comprising a power line which supplies power to the source electrode.

12. The display of claim 11, wherein the source electrode is connected to the power line, and the drain electrodes are connected respectively to the first and second sensing lines.

13. The display of claim 1, wherein the gate electrode is a conductive spacer.

14. The display of claim 13, wherein a common voltage substantially in the range of 0 to 15V is applied to the conductive spacer.

15. The display of claim 13, wherein the conductive spacer is formed opposing the source electrode and the drain electrode.

16. A display comprising:

a first substrate and a second substrate opposing each other;

a gate line and a first sensing line formed spaced apart on the first substrate along one direction;

a data line and a second sensing line formed spaced apart on the first substrate along another direction intersecting the gate line;

a pixel electrode formed in proximity to the gate line and the data line;

a thin-film transistor for pixel driving connected to the gate line, the data line, and the pixel electrode; and

a thin-film transistor for touch position detection connected to a power line and the first and second sensing lines, and which is driven by a conductive spacer of the second substrate.

17. The display of claim 16, wherein the power line comprises one of the gate line and the data line.

18. The display of claim 17, wherein the thin-film transistor for touch position detection comprises:

a first thin-film transistor comprising a source electrode connected to the power line, a drain electrode connected to the first sensing line, and the conductive spacer operating as a gate electrode; and

a second thin-film transistor comprising a source electrode connected to the power line, a drain electrode connected to the second sensing line, and the conductive spacer operating as a gate electrode.