RESISTIVE TOUCH PANEL WITH MULTI-TOUCH RECOGNITION ABILITY

• US 20100001977A1
• Filed: 06/30/2009
• Published: 01/07/2010
• Est. Priority Date: 07/04/2008
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Lin, Sherry, Lee, Jian-Feng, Lin, Gwo-Sen
• Application Number:
  US12/495,074
• Publication Number:
  US 20100001977A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistive touch panel with multi-touch recognition ability comprises: a top substrate, configured with at least two conductive electrodes; a bottom substrate, being integrated with the top substrate at a surface where the at least two conductive electrodes are formed; and an insulating layer, sandwiched between the top and the bottom substrates; wherein the bottom substrate is configured with four conductive electrodes to be used for forming two electric fields, one varying along an X-axis direction on a plane defined by a Cartesian coordinate system while enabling the other one to vary along a Y-axis direction of the same. With the aforesaid device, when there are multiple touches contact the top substrate at the same time, voltage variations relating to those touches can be detected from the bottom substrate for identifying the location of those touches and thus enabling the resistive touch panel with multi-touch recognition ability.

Claims

1. A resistive touch panel with multi-touch recognition ability, comprising:

a top substrate, configured with at least two conductive electrodes;

a bottom substrate, capable of being adhered and integrated with the top substrate at the surface where the at least two conductive electrodes are formed;

and an insulating layer, sandwiched between the top substrate and the bottom substrate;

wherein the bottom substrate is configured with four conductive electrodes to be used for forming two electric fields, one varying along an X-axis direction on a plane defined by a Cartesian coordinate system while enabling the other one to vary along a Y-axis direction of the same.

2. The resistive touch panel of claim 1, wherein the plural conductive electrodes on the top substrate are formed in a shape selected from the group consisting of:

regular polygons, irregular polygons and other geometrical shapes.

3. The resistive touch panel of claim 1, wherein each of the plural conductive electrodes on the top substrate is connected to a signal line in respective.

4. The resistive touch panel of claim 1, wherein the insulating layer is substantially a layer of air having a plurality of spacers being disposed therein.

5. The resistive touch panel of claim 4, wherein the spaces are made of a material selected from the group consisting of:

a glass, a plastic, a polymer material, an oxide particle and the combination thereof.

6. The resistive touch panel of claim 4, wherein the spacers are disposed for enabling the top substrate to be spaced from the bottom substrate by an interval ranged between 1 micron and 1000 microns when the touch panel is not being pressed.

7. The resistive touch panel of claim 1, wherein the top substrate and the bottom substrate are made of a transparent material selected from the group consisting of:

a glass, an acrylic, poly carbonate (PC), polyethylene terephthalate (PET), and polyimide (PI).

8. The resistive touch panel of claim 1, wherein the conductive electrodes formed on the top and the bottom substrates are made of a transparent conductive material selected from the group consisting of:

indium-tin oxide (ITO), indium doped zinc oxide (IZO), aluminum zinc oxide (AZO), Zinc oxide (ZnO), tin oxide (SnO).

9. The resistive touch panel of claim 1, wherein the insulating layer is made of a material selected from the group consisting of:

an oxide and an organic polymer insulating material.

10. The resistive touch panel of claim 1, wherein the plural conductive electrodes are formed on the top substrate in a manner selected from the group consisting of:

being structured as an array, and being structured in an irregular arrangement.

11. The resistive touch panel of claim 1, wherein the top substrate has at least four conductive electrodes.

12. The resistive touch panel of claim 11, wherein the top substrate has eight conductive electrodes.

13. The resistive touch panel of claim 11, wherein the conductive electrodes are radially formed on the top substrate.

14. The resistive touch panel of claim 13, wherein the top substrate has thirty-eight conductive electrodes.

15. The resistive touch panel of claim 11, wherein the plural conductive electrodes are formed on the top substrate as an array while each being respectively connected to a signal line as all the signal lines are extending following a same extending direction.

16. The resistive touch panel of claim 11, wherein the plural conductive electrodes are formed on the top substrate as an array while each being respectively connected to a signal line as one signal line is extending following an extending direction and all the other signal lines are extending following another extending direction.

17. The resistive touch panel of claim 11, wherein the plural conductive electrodes of the top substrate are in a diamond shape and are structured in an array.

20. The resistive touch panel of claim 1, further comprising:

a plurality of signal lines, each being etched on the bottom substrate.

18. The resistive touch panel of claim 18, wherein the top substrate has thirty-two conductive electrodes includes:

a plurality of electrodes selected from the thirty-two conductive electrodes, being divided into groups and arranged in parallel rows extending in the X-axis direction while enabling each row to be serially connected respectively to a signal line;

a plurality of electrodes selected from those not included in the rows, being divided into groups and arranged in parallel columns extending in the Y-axis direction while enabling each column to be serially connected respectively to a signal line;

an insulating layer, being disposed in spaces between the rows and the columns for preventing short circuit from happening by the cross-over between the electrodes arranged in rows of X-axis direction and the electrodes arranged in columns of Y-axis direction.

19. The resistive touch panel of claim 19, wherein the top substrate has thirty-two conductive electrodes includes:

twenty electrodes selected from the thirty-two conductive electrodes, being divided into five groups and arranged in five parallel rows as each row contains four conductive electrodes;

twelve electrodes selected from those not included in the rows, being divided into three groups and arranged in three parallel columns as each column contains four conductive electrodes.