Method and device for detecting defects in a pressing test of a touch screen

Patent metadata

Field	Value
Publication number	US-10222884-B2
Application number	US-201615159214-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Jul 6, 2015
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

The present invention provides a method and a device for detecting defects in a pressing test of a touch screen. The method for detecting defects in a pressing test of a touch screen includes: Step S 1 : acquiring, after each test point of the touch screen is tested, an image of a test region in which the test point is located, when performing the pressing test; Step S 2 : identifying a quantity of abnormal points in the acquired image; and Step S 3 : comparing the identified quantity of abnormal points with a quantity of abnormal points allowed in the pressing test, and determining that the touch screen has defects if the identified quantity of abnormal points exceeds the quantity of abnormal points allowed in the pressing test. The above method for detecting defects can check instantly and accurately whether defects arise on the touch screen during the pressing test.

First claim

What is claimed is:

1. A method for detecting defects in a pressing test of a touch screen, comprising:
Step S 1 : acquiring, after each test point of the touch screen is tested, an image of a test region in which the test point is located, when performing the pressing test;
Step S 2 : identifying a quantity of abnormal points in the acquired image; and
Step S 3 : comparing the identified quantity of abnormal points with a quantity of abnormal points allowed in the pressing test, and determining that the touch screen has defects if the identified quantity of abnormal points exceeds the quantity of abnormal points allowed in the pressing test,
wherein Step S 2 further comprises: identifying a size of each abnormal point in the acquired image, and classifying the abnormal points into multiple levels based on the sizes of the abnormal points; and
Step S 3 further comprises: comparing a quantity of abnormal points of each level with a quantity of abnormal points of the same level allowed in the pressing test, and determining that the touch screen has defects if a quantity of abnormal points of any level exceeds the quantity of abnormal points of the same level allowed in the pressing test.

2. The method for detecting defects in a pressing test of a touch screen according to claim 1 , wherein Step S 3 further comprises: comprehensively determining a defect level of the touch screen based on respective values by which the quantity of abnormal points of each level exceeds the quantity of abnormal points of the same level allowed in the pressing test.

3. The method for detecting defects in a pressing test of a touch screen according to claim 1 , further comprising: after Step S 3 , giving a warning after determining that the touch screen has defects.

4. The method for detecting defects in a pressing test of a touch screen according to claim 2 , further comprising: after Step S 3 , giving a warning after determining that the touch screen has defects, and notifying of the determined defect level of the touch screen.

5. The method for detecting defects in a pressing test of a touch screen according to claim 1 , wherein Step S 1 further comprises: indicating, when acquiring the image of the test region in which the test point is located, how many times the test point has been tested.

6. The method for detecting defects in a pressing test of a touch screen according to claim 1 , wherein in Step S 2 , the quantity of abnormal points in the image acquired in Step S 1 is identified by comparing the image acquired in Step S 1 with a standard image, the standard image being an image of the test region in which the test point is located without any abnormal point.

7. The method for detecting defects in a pressing test of a touch screen according to claim 5 , further comprising, after Step S 3 , recording, after determining that the touch screen has defects, how many times the test point has been tested.

8. A device for detecting defects in a pressing test of a touch screen, comprising:
an image acquisition unit, for acquiring, after each test point of the touch screen is tested, an image of a test region in which the test point is located, when performing the pressing test;
an image identification unit, for identifying a quantity of abnormal points in the acquired image; and
a defect determination unit, for comparing the identified quantity of abnormal points with a quantity of abnormal points allowed in the pressing test, and determining that the touch screen has defects if the identified quantity of abnormal points exceeds the quantity of abnormal points allowed in the pressing test,
wherein the image identification unit further identifies a size of each abnormal point in the acquired image, and classifies the abnormal points into multiple levels based on the sizes of the abnormal points; and
the defect determination unit further compares a quantity of abnormal points of each level with a quantity of abnormal points of the same level allowed in the pressing test, and determines that the touch screen has defects if a quantity of abnormal points of any level exceeds the quantity of abnormal points of the same level allowed in the pressing test.

9. The device for detecting defects in a pressing test of a touch screen according to claim 8 , wherein the defect determination unit further determines comprehensively a defect level of the touch screen based on respective values by which the quantity of abnormal points of each level exceeds the quantity of abnormal points of the same level allowed in the pressing test.

10. The device for detecting defects in a pressing test of a touch screen according to claim 8 , further comprising a warning unit, for giving a warning after the defect determination unit determines that the touch screen has defects.

11. The device for detecting defects in a pressing test of a touch screen according to claim 9 , further comprising a warning unit, which is used for giving a warning after the defect determination unit determines that the touch screen has defects, and notifying the determined defect level of the touch screen.

12. The device for detecting defects in a pressing test of a touch screen according to claim 8 , wherein the image acquisition unit further indicates, when acquiring the image of the test region in which the test point is located, how many times the test point has been tested.

13. The device for detecting defects in a pressing test of a touch screen according to claim 8 , wherein the image identification unit identifies the quantity of abnormal points in the image acquired by the image acquisition unit, by comparing the image acquired by the image acquisition unit with a standard image, the standard image being an image of the test region in which the test point is located without any abnormal point.

14. The device for detecting defects in a pressing test of a touch screen according to claim 12 , further comprising a recording unit, which is used for recording, after the defect determination unit determines that the touch screen has defects, how many times the test point has been tested.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Yang Gang
• Song Yong
• Long Jun
• An Xijun
• Zhang Hongkun
• Liu Ziwang

Classifications

• G02F2203/69

  Arrangements or methods for testing or calibrating a device · CPC title

• G06T2207/30121

  CRT, LCD or plasma display · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06T7/001

  using an image reference approach · CPC title