TESTING SYSTEM AND TESTING METHOD FOR TOUCH DEVICE

• US 20140043038A1
• Filed: 08/09/2013
• Published: 02/13/2014
• Est. Priority Date: 08/09/2012
• Status: Active Grant

• Current Assignee: Ili Technology Corp. (MediaTek, Inc.)
• Original Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Inventors: Ho, Kai-Ting, Chen, Chien-Chuan, Huang, Yu-Chien
• Granted Patent: US 9,213,057 B2
• Time in Patent Office: Days
• US Class Current: 324/537
• CPC Class Codes: G01R 31/28 Testing of electronic circuits, e.g. by signal tracer EMC, EMP or similar testing of electronic circuits G01R31/002; testing for short-circuits, discontinuities, leakage or incorrect line connection G01R31/50; checking computers or computer components G06F11/00; checking static stores for correct operation G11C29/00 ; testing receivers or transmitters of transmission systems H04B17/00
• CPC Class Codes: G01R 31/2829 Testing of circuits in sensor or actuator systems testing of apparatus for measuring electric or magnetic variables G01R35/00; testing of indicating or recording apparatus G01D; in airbag systems B60R21/0173; checking gas analysers G01N33/007; monitoring or fail-safe circuits for electromagnets H01F7/1844
• CPC Class Codes: G01R 31/2848 using simulation
• CPC Class Codes: G01R 31/312 by capacitive methods
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers

Abstract

A testing system for a touch device includes a touch simulation module, a control module and a determination module is provided. The touch simulation module includes multiple conductive elements respectively corresponding to multiple touch sensing regions of the touch device. The control module selectively provides a testing signal to one or multiple of the conductive elements. The determination module determines whether the touch device correctly responds a testing that the control module provides to the device under testing through the touch simulation module.

Claims

1. A touch device testing system, comprising:

a touch simulation module, comprising a plurality of conductive elements respectively corresponding to a plurality of touch sensing regions of the touch device;

a control module, coupled to the conductive elements, for selectively providing a testing signal to one or a plurality of conductive elements among the conductive elements; and

a determination module, coupled to the touch device, for determining whether the touch device correctly responds to a testing that the control device applies to the touch sensing regions through the touch simulation module.

2. The testing system according to claim 1, wherein the testing signal is at a ground potential.

3. The testing system according to claim 1, wherein the control module sequentially provides the testing signal to the conductive elements.

4. The testing system according to claim 1, wherein the conductive elements are a plurality of metal plates.

5. The testing system according to claim 1, wherein the conductive elements are disposed at a surface of the touch simulation module.

6. The testing system according to claim 1, wherein the touch device comprises a plurality of sensing electrodes of a self capacitive touch panel, and the touch sensing regions are formed by the sensing electrodes.

7. The testing system according to claim 6, wherein the determination module determines whether the touch device correctly responds to the testing according to a sensed capacitance or position information generated by the touch device.

8. The testing system according to claim 6, wherein the sensing electrodes have a planar shape similar to a scalene triangle, and a vertex and a base arranged in a staggered arrangement on a plane, with a shortest side of each of the sensing electrodes being parallel to a predetermined direction;

the conductive elements are a plurality of strip-like conductive plates disposed in parallel; and

when the touch simulation module is placed closely to the device under test to perform the testing, the strip-like conductive plates are also parallel to the predetermined direction.

9. A testing method for testing a touch device, comprising:

a) applying a touch simulation module closely to the touch device, wherein the touch simulation module comprises a plurality of conductive elements respectively corresponding a plurality of touch sensing regions of the touch device;

b) performing an auto-testing procedure of selectively providing a testing signal to one or a plurality of conductive elements among the conductive elements; and

c) determining whether the touch device correctly responds to the auto-testing procedure.

10. The testing method according to claim 9, wherein the testing signal is at a ground potential.

11. The testing method according to claim 9, wherein step (b) sequentially provides the testing signal to the plurality of conductive elements among the conductive elements.

12. The testing method according to claim 9, wherein step (c) determines whether the touch device correctly responds to the auto-testing procedure according to a sensed capacitance or position information generated by the touch device.