RESISTIVE TOUCH PANEL AND METHOD FOR DETECTING TOUCH POINT TYPE

• US 20110012864A1
• Filed: 07/15/2010
• Published: 01/20/2011
• Est. Priority Date: 07/20/2009
• Status: Abandoned Application

• Current Assignee: ASUSTek Computer, Inc.
• Original Assignee: ASUSTek Computer, Inc.
• Inventors: Lin, Hung-Yi
• Application Number:
  US12/837,107
• Publication Number:
  US 20110012864A1
• 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 and a method for detecting the touch point type are disclosed. The resistive touch panel has multiple detecting areas. The method includes the following steps: obtaining the positions of multiple touch points when a touch operation is generated on the touch panel; determining whether the touch points can be combined to be a combined touch point when the touch points are located at adjacent areas; and determining whether the combined touch point is a first-type touch point or a second-type touch point when the touch points can be combined to be the combined touch point.

Claims

1. A method for detecting a touch point type in a resistive touch panel, wherein the resistive touch panel has multiple detecting areas, the method comprising the steps of:

obtaining multiple touch points when a touch operation is generated on a touch panel;

determining whether the touch points are capable of being combined to be a combined touch point when the touch points are located in adjacent detecting areas; and

determining whether the combined touch point is a first-type touch point or a second-type touch point when the touch points are capable of being combined to be a combined touch point.

2. The method for detecting the touch point type according to claim 1, further comprising:

outputting the touch points when the touch points are not located at the adjacent areas.

3. The method for detecting the touch point type according to claim 1, further comprising:

outputting the touch points when the touch points are incapable of being combined to be the combined touch point.

4. The method for detecting the touch point type according to claim 1, wherein the step of determining whether the touch points are capable of being combined to be a combined touch point further comprises:

determining that the touch points are capable of being combined to be the combined touch point when the distance between any two touch points is shorter than a first threshold length.

5. The method for detecting the touch point type according to claim 1, wherein the step of determining whether the combined touch point is a first-type touch point or a second-type touch point when the touch points are capable of being combined to be a combined touch point further comprises:

obtaining the position of the combined touch point;

calculating the sum of distances between each of the touch points and the combined touch point;

determining that the combined touch point is the first-type touch point when the sum of distances is shorter than a second threshold length; and

determining that the combined touch point is the second-type touch point when the sum of distances is longer than the second threshold length.

6. The method for detecting the touch point type according to claim 1, wherein the step of determining whether the combined touch point is a first-type touch point or a second-type touch point when the touch points are capable of being combined to be a combined touch point further comprises:

calculating the sum of distances between any two touch points;

determining that the combined touch point is the first-type touch point when the sum of distances is shorter than a second threshold length; and

determining that the combined touch point is the second-type touch point when the sum of distances is longer than the second threshold length.

7. The method for detecting the touch point type according to claim 1, wherein the first-type touch point is a small-area touch point, and the second-type touch point is a large-area touch point.

8. The method for detecting the touch point type according to claim 1, wherein the first-type touch point is a stylus touch point, a penpoint touch point or a sharp-object touch point, and the second-type touch point is a finger touch point or a palm touch point.

9. A resistive touch panel comprising:

a first-direction first electrode group including m electrodes;

a first-direction second electrode group including m electrodes;

a second-direction first electrode group including n electrodes;

a second-direction second electrode group including n electrodes;

wherein the 2m+2n electrodes divide the resistive touch panel into m×

n detecting areas;

a multiplex switching circuit connected to each of the 2m+2n electrodes; and

a control circuit connected to the multiplex switching circuit, wherein the control circuit determines whether the touch points are capable of being combined to be a combined touch point when a touch operation is generated, and determines whether the combined touch point is a first-type touch point or a second-type touch point when the touch points are determined to be capable of being combined to be a combined touch point.

10. The resistive touch panel according to claim 9, wherein the first-type touch point is a small-area touch point, and the second-type touch point is a large-area touch point.

11. The resistive touch panel according to claim 9, wherein the first-type touch point is a stylus touch point, a penpoint touch point or a sharp object touch point, and the second-type touch point is a finger touch point or a palm touch point.