TOUCH DEVICE, TOUCH PANEL, AND METHOD FOR CONTROLLING THE SAME

• US 20140327627A1
• Filed: 09/09/2013
• Published: 11/06/2014
• Est. Priority Date: 05/01/2013
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: WENG, Ming-Chi, CHEN, Yun-Chih, CHEN, Hung-Hsiang
• Granted Patent: US 9,575,603 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A touch panel includes a substrate and a first electrode array. The first electrode array is disposed on the substrate and includes first and second touch regions. The first electrode array further includes first, second, third, and fourth electrodes. The first electrode is disposed on the first touch region. The second electrode is disposed on the first touch region corresponding in position to the first electrode. The third electrode is disposed on the second touch region. The fourth electrode is disposed on the second touch region corresponding in position to the third electrode. In addition, the first to fourth electrodes are all disposed on the same layer. The first electrode is disposed diagonally to the fourth electrode, and the first electrode is electrically coupled to the fourth electrode. Furthermore, a method for controlling the touch panel is also disclosed herein.

Claims

1. A touch panel comprising:

a substrate;

a first electrode array disposed on the substrate, the first electrode array comprising a first touch region and a second touch region and further comprising;

a first electrode disposed in the first touch region;

a second electrode disposed in the first touch region, wherein the second electrode is disposed corresponding in position to the first electrode;

a third electrode disposed in the second touch region; and

a fourth electrode disposed in the second touch region, wherein the fourth electrode is disposed corresponding in position to the third electrode;

wherein the first to fourth electrodes are all disposed on the same layer, the first electrode and the fourth electrode are disposed diagonally to each other, and the first electrode is electrically coupled to the fourth electrode.

2. The touch panel according to claim 1, wherein each of the first, second, third, and fourth electrodes is trapezoidal in shape.

3. The touch panel according to claim 2, wherein a longer one of an upper base and a lower base of the trapezoid of the first electrode and a shorter one of an upper base and a lower base of the trapezoid of the second electrode are disposed on the same side.

4. The touch panel according to claim 2, wherein a longer one of an upper base and a lower base of the trapezoid of the third electrode and a shorter one of an upper base and a lower base of the trapezoid of the fourth electrode are disposed on the same side.

5. The touch panel according to claim 1, further comprising:

a second electrode array disposed on the substrate, the second electrode array comprising a third touch region and a fourth touch region, and further comprising;

a fifth electrode disposed in the third touch region;

a sixth electrode disposed in the third touch region, wherein the sixth electrode is disposed corresponding in position to the fifth electrode;

a seventh electrode disposed in the fourth touch region; and

an eighth electrode disposed in the fourth touch region, wherein the eighth electrode is disposed corresponding in position to the seventh electrode;

wherein the fifth to eighth electrodes are all disposed on the same layer, the sixth electrode and the seventh electrode are disposed diagonally to each other, and the sixth electrode is electrically coupled to the seventh electrode.

15. A method for controlling a touch panel, applied in the touch panel according to claim 1, comprising:

scanning the first electrode, the second electrode, and the third electrode in sequence by a processor;

detecting the second electrode and the third electrode when scanning the first electrode by the processor;

detecting the first electrode and the fourth electrode when scanning the second electrode by the processor; and

detecting the first electrode and the fourth electrode when scanning the third electrode by the processor.

6. A touch device comprising:

a processor;

a substrate;

an electrode array disposed on the substrate, the electrode array comprising a first touch region and a second touch region and further comprising;

a first electrode disposed in the first touch region and electrically coupled to the processor through a first trace;

a second electrode disposed in the first touch region, wherein the second electrode is disposed corresponding in position to the first electrode, and the second electrode is electrically coupled to the processor through a second trace;

a third electrode disposed in the second touch region and electrically coupled to the processor through a third trace; and

a fourth electrode disposed in the second touch region, wherein the fourth electrode is disposed corresponding in position to the third electrode;

wherein the first to fourth electrodes are all disposed on the same layer, the first electrode and the fourth electrode are disposed diagonally to each other, and the first electrode is electrically coupled to the fourth electrode;

wherein the processor scans the first electrode, the second electrode, and the third electrode in sequence;

the second electrode and the third electrode are detected when the processor scans the first electrode;

the first electrode and the fourth electrode are detected when the processor scans the second electrode; and

the first electrode and the fourth electrode are detected when the processor scans the third electrode.

7. The touch device according to claim 6, wherein the second electrode detects a touch area generated by a touch event and outputs a touch signal to the processor according to the touch area correspondingly when the processor scans the first electrode and the touch event occurs in the first touch region.

8. The touch device according to claim 6, wherein the third electrode detects a touch area generated by a touch event and outputs a touch signal to the processor according to the touch area correspondingly when the processor scans the first electrode and the touch event occurs in the second touch region.

9. The touch device according to claim 6, wherein each of the second electrode and the third electrode detects touch areas generated by touch events and outputs a touch signal to the processor according to the touch areas when the processor scans the first electrode and touch events occur in the first touch region and the second touch region at the same time.

10. The touch device according to claim 6, wherein the first electrode detects a touch area generated by a touch event and outputs a touch signal to the processor according to the touch area correspondingly when the processor scans the second electrode and the touch event occurs in the first touch region.

11. The touch device according to claim 6, wherein the first electrode detects a touch area generated by a touch event through the fourth electrode and outputs a touch signal to the processor according to the touch area correspondingly when the processor scans the third electrode and the touch event occurs in the second touch region.

12. The touch device according to claim 6, wherein each of the first, second, third and fourth electrodes is trapezoidal in shape.

13. The touch device according to claim 12, wherein a touch area generated by a touch event is variable correspondingly when the touch event occurs along an upper base to a lower base of one of the trapezoids of the electrode, and one of the electrodes outputs a touch signal to the processor correspondingly according to the touch area.

14. The touch device according to claim 6, wherein when one of the electrodes is used as a signal electrode, another one of the electrodes is used as a detect electrode, and when one of the electrodes is used as the detect electrode, another one of the electrodes is used as the signal electrode.