TOUCH SENSING PANEL INCLUDING BIDIRECTIONAL ADJACENT ELECTRODES, AND TOUCH SENSING APPARATUS

• US 20110141051A1
• Filed: 08/13/2009
• Published: 06/16/2011
• Est. Priority Date: 08/14/2008
• Status: Abandoned Application

• Current Assignee: Melfas Incorporated
• Original Assignee: Melfas Incorporated
• Inventors: Ryu, Shiwon
• Application Number:
  US13/058,839
• Publication Number:
  US 20110141051A1
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present invention relates to a touch sensing panel and a touch sensing apparatus. The touch sensing panel according to the present invention includes a substrate, and a plurality of sensing electrodes arranged on the substrate and extended in one axial direction to generate a sensed signal in accordance with a contact, wherein at least one of the plurality of sensing electrodes is arranged such that the one sensing electrode is adjacent to another sensing electrode on both sides of the one axial direction. According to the present invention, provided is a touch sensing panel in which a plurality of sensing electrodes are arranged and extend in one axial direction to minimize a bezel area, and at least one of the plurality of sensing electrodes is arranged such that the one sensing electrode is adjacent to another sensing electrode at both sides of the one axial direction to accurately determine a plurality of touch inputs.

Claims

1. A touch sensing panel, comprising:

a substrate; and

a plurality of sensing electrodes arranged on the substrate and extended in one axial direction to generate a sensing signal in response to a touch, wherein

at least one sensing electrode among the plurality of sensing electrodes is adjacent to another sensing electrode on both sides of the one axial direction.

2. The touch sensing panel of claim 1, wherein at least one of the plurality of sensing electrodes has a shape corresponding to an adjacent sensing electrode.

3. The touch sensing panel of claim 1, wherein:

the sensing electrode includes at least one protrusion and at least one depression, and

the protrusion of the sensing electrode has a shape complementary to a depression of an adjacent sensing electrode.

4. The touch sensing panel of claim 1, wherein the sensing electrode has a rectangular shape or a trapezoidal shape.

5. The touch sensing panel of claim 1, wherein the plurality of sensing electrodes include a first sub-electrode pair having a shape corresponding to the each other, and a second sub-electrode pair having a shape corresponding to the each other.

6. The touch sensing panel of claim 1, wherein the substrate is a window where at least a portion of the window is exposed to receive a touch.

7. The touch sensing panel of claim 1, further comprising:

a transparent window attached to the sensing electrode to receive a touch.

8. A touch sensing apparatus, comprising:

a plurality of sensing electrodes arranged on one surface of a substrate and extended in one axial direction; and

a control unit connected to the plurality of sensing electrodes to receive a sensing signal, and to generate touch information using the sensing signal, wherein

at least one of the plurality of sensing electrodes is arranged to be adjacent to another sensing electrode in both sides of the one axial direction.

9. The touch sensing apparatus of claim 8, wherein at least one of the plurality of sensing electrodes has a shape corresponding to an adjacent sensing electrode.

10. The touch sensing apparatus of claim 8, wherein:

the sensing electrode includes at least one protrusion and at least one depression, and

the protrusion of the sensing electrode has a shape complementary to a depression of an adjacent sensing electrode.

11. The touch sensing apparatus of claim 8, wherein the sensing electrode has a rectangular shape or a trapezoidal shape.

12. The touch sensing apparatus of claim 8, wherein the one axial direction is a major axial direction of a display region where the sensing electrodes are disposed.

13. The touch sensing apparatus of claim 8, wherein the control unit comprises:

a sensing unit to compute touch sensing data from the sensing signal; and

a processing unit to correct the touch sensing data.

14. The touch sensing apparatus of claim 13, wherein the processing unit adjusts the touch sensing data with reference to a predetermined table.

15. The touch sensing apparatus of claim 13, wherein the processing unit corrects an error in the touch sensing data due to a resistance component between both ends of the sensing electrode.

16. The touch sensing apparatus of claim 8, wherein each of the plurality of sensing electrodes includes at least one boundary shape corresponding to another adjacent sensing electrode.

17. The touch sensing apparatus of claim 8, wherein the control unit determines the touch by using the sensing signal including a change in a capacitance occurring between a touch object and the sensing electrode.

18. A touch sensing panel, comprising:

a plurality of sensing electrodes disposed along one axial direction; and

a computing unit to compute a touch location using a magnitude of a touch signal measured from each of the plurality of sensing electrodes, wherein

at least one of the plurality of sensing electrodes has a shape where a width decreases after gradually increasing along the one axial direction.

19. The touch sensing panel of claim 18, wherein the computing unit computes the touch location by enabling the magnitude of the touch signal measured with respect to each sensing electrode be a weighted value, and evaluating a weighted average of locations where the plurality of sensing electrodes have a maximal width.

20. The touch sensing panel of claim 18, wherein each of the plurality of sensing electrodes has a boundary shape complementary to another adjacent sensing electrode.

21. The touch sensing panel of claim 20, wherein the boundary shape has at least one protrusion and at least one depression.

22. The touch sensing panel of claim 18, wherein the at least one of the plurality of sensing electrodes has a shape in which the same or a symmetrical electrode is connected in the other axial direction intersecting the one axis.