CN103197173A - Test method of capacitance touch screen - Google Patents
Test method of capacitance touch screen Download PDFInfo
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- CN103197173A CN103197173A CN2013100758221A CN201310075822A CN103197173A CN 103197173 A CN103197173 A CN 103197173A CN 2013100758221 A CN2013100758221 A CN 2013100758221A CN 201310075822 A CN201310075822 A CN 201310075822A CN 103197173 A CN103197173 A CN 103197173A
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Abstract
The invention discloses a test method of a capacitance touch screen. The test method of the capacitance touch screen includes the following steps: S1, measuring capacitance value of an intersection point of a signal-emitting transmission access Tx line and a signal-receiving transmission access Rx line on the capacitance touch screen; S2, comparing the capacitance value obtained from measurement with an initial standard threshold value; S3, if the measured capacitance value and the initial standard threshold value are normal, touch performance of the intersection point is normal; if the measured capacitance value and the initial standard threshold value are abnormal, the touch performance of the intersection point is abnormal. The test method of the capacitance touch screen is convenient to use and capable of improving test efficiency, reducing test errors, and effectively avoiding outflow of non-performing products.
Description
Technical field
The present invention relates to a kind of method of testing, specifically a kind of method to capacitive touch screen is tested.
Background technology
Along with the development of electron trade, touch-screen overall application in each class of electronic devices.Touch-screen need be tested the behaviour in service of touch-screen installing in the production run of assembling with electronic equipment, prevents that bad touch-screen product from coming into the market, and makes troubles to the consumer.
Traditional method of testing to capacitive touch screen generally is to make touch-screen enter the processing of ruling in the corresponding testing tool, and the staff observes and confirms to have or not broken string or do not have situation such as function.Owing to need carry out manual observation, error takes place easily, cause error code survey rate higher, and along with staff's sense of fatigue increases, false failure rate can increase thereupon, causes yield of products lower.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of convenient test, testing efficiency height, the method for testing of the capacitive touch screen that error rate is low.
In order to solve the problems of the technologies described above, the present invention takes following technical scheme:
A kind of method of testing of capacitive touch screen may further comprise the steps:
S1, the transmission channel Tx line that transmits on the measurement capacitive touch screen and the capacitance of the joint of the transmission channel Rx line that receives signal;
S2 compares capacitance and the primary standard threshold values that measures;
S3, if capacitance and the primary standard threshold values measured are no abnormal, then the touch performance of this joint is normal; If the capacitance of measuring and primary standard threshold values exist unusual, then the touch performance of this joint is undesired.
Described method of testing also comprises step:
S4 when the capacitance of Tx line and Rx line joint and primary standard threshold values exist when unusual, confirms whether the signal that this Tx line is launched receives at corresponding Rx line receiving end;
S5, if receive, then this Tx line and Rx line are regular path; If do not receive, there are open circuit situation in this Tx line and/or Rx line, and this capacitive touch screen is defective products.
Described method of testing also comprises step:
S6, whether the signal that detection Tx line is launched is lossy at the receiving end of Rx line;
If S7 lossy, then further checks between adjacent Tx line and the Rx line whether have short-circuit conditions, if there is short-circuit conditions, then this capacitive touch screen is defective products; If lossless, then illustrate not have short-circuit conditions between the adjacent circuit.
Described primary standard threshold values is the numerical value that adds positive and negative deviation when the condenser paper average that time all samples measures, and this deviation is 15%.
Convenient test of the present invention has effectively improved testing efficiency, has reduced mistake and has surveyed probability, prevents that effectively defective products from coming into the market, and improves yield of products.
Description of drawings
Accompanying drawing 1 is principle of the invention schematic flow sheet.
Embodiment
For the ease of those skilled in the art's understanding, the invention will be further described below in conjunction with accompanying drawing.
The present invention has disclosed a kind of method of testing of capacitive touch screen, is used for the performance of capacitive touch screen is tested, and prevents that the electronic equipment that is equipped with bad touch-screen from coming into the market, and convenient test effectively promotes testing efficiency.
As shown in Figure 1, a kind of method of testing of capacitive touch screen may further comprise the steps:
S1, the transmission channel Tx line that transmits on the measurement capacitive touch screen and the capacitance of the joint of the transmission channel Rx line that receives signal.Have the transmission channel Rx line of some the transmission channel Tx circuits that transmit and reception signal on the capacitive touch screen, X-axis and Y direction are staggered respectively, are formed with a plurality of joints.
S2 compares capacitance and the primary standard threshold values that measures.Capacitance measurement to the joint of each Tx line and Rx line obtains, and capacitance and the primary standard threshold values with each joint compares then.This primary standard threshold values adds the numerical value of positive and negative deviation for the condenser paper average that measures when time all samples, this deviation is 15%, because the condenser paper average of the sample of each batch can be according to the different technology of different materials and different, therefore, all be that mean value with current batch of sample is as the criterion.Adopt the mean value of sample to add positive and negative deviation, more can guarantee accuracy and the efficiency tested.
S3, if capacitance and the primary standard threshold values measured are no abnormal, then the touch performance of this joint is normal; If the capacitance of measuring and primary standard threshold values exist unusual, then the touch performance of this joint is undesired.Compare with the primary standard threshold values when the capacitance at all joint places and not have abnormal conditions, then the performance of this piece capacitive touch screen is normal, is non-defective unit.There are abnormal conditions if having a joint or several joint to compare with the primary standard threshold values, illustrate that then the touch performance at these several places is undesired, can have influence on follow-up normal use.
Described method of testing also comprises step:
S4 when the capacitance of Tx line and Rx line joint and primary standard threshold values exist when unusual, confirms whether the signal that this Tx line is launched receives at corresponding Rx line receiving end.If there are abnormal conditions, then further detect the concrete condition of this touch-screen.
S5, if receive, then this Tx line and Rx line are regular path; If do not receive, there are open circuit situation in this Tx line and/or Rx line, and this capacitive touch screen is defective products, does not namely receive signal, then exist in the touch-screen of this test and can't carry out the zone that normal touch is controlled.
In order further to improve the accuracy of test, improve yields, described method of testing also comprises step:
S6, whether the signal that detection Tx line is launched is lossy at the receiving end of Rx line.
If S7 lossy, then further checks between adjacent Tx line and the Rx line whether have short-circuit conditions, if there is short-circuit conditions, then this capacitive touch screen is defective products, and if there is no short-circuit conditions then can continue to use; If lossless, then illustrate not have short-circuit conditions between the adjacent circuit.
In addition, after whole test is finished, if that all pass through smoothly then can design demonstration " " Pass " or other signs, test failure show that " Fail " or other identify to remind the tester.
Claims (4)
1. the method for testing of a capacitive touch screen may further comprise the steps:
S1, the transmission channel Tx line that transmits on the measurement capacitive touch screen and the capacitance of the joint of the transmission channel Rx line that receives signal;
S2 compares capacitance and the primary standard threshold values that measures;
S3, if capacitance and the primary standard threshold values measured are no abnormal, then the touch performance of this joint is normal; If the capacitance of measuring and primary standard threshold values exist unusual, then the touch performance of this joint is undesired.
2. the method for testing of capacitive touch screen according to claim 1 is characterized in that, described method of testing also comprises step:
S4 when the capacitance of Tx line and Rx line joint and primary standard threshold values exist when unusual, confirms whether the signal that this Tx line is launched receives at corresponding Rx line receiving end;
S5, if receive, then this Tx line and Rx line are regular path; If do not receive, there are open circuit situation in this Tx line and/or Rx line, and this capacitive touch screen is defective products.
3. the method for testing of capacitive touch screen according to claim 1 and 2 is characterized in that, described method of testing also comprises step:
S6, whether the signal that detection Tx line is launched is lossy at the receiving end of Rx line;
If S7 lossy, then further checks between adjacent Tx line and the Rx line whether have short-circuit conditions, if there is short-circuit conditions, then this capacitive touch screen is defective products; If lossless, then illustrate not have short-circuit conditions between the adjacent circuit.
4. the method for testing of capacitive touch screen according to claim 3 is characterized in that, described primary standard threshold values is the numerical value that adds positive and negative deviation when the condenser paper average that time all samples measures, and this deviation is 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100758221A CN103197173A (en) | 2013-03-11 | 2013-03-11 | Test method of capacitance touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100758221A CN103197173A (en) | 2013-03-11 | 2013-03-11 | Test method of capacitance touch screen |
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| CN103197173A true CN103197173A (en) | 2013-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082631A (en) * | 2019-04-29 | 2019-08-02 | 昆山龙腾光电有限公司 | The test method and test device of touch panel |
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| CN101369205A (en) * | 2007-08-13 | 2009-02-18 | 新唐科技股份有限公司 | Capacitive detection system and method, and time-interval measurement module and method |
| US20120050206A1 (en) * | 2010-08-29 | 2012-03-01 | David Welland | Multi-touch resolve mutual capacitance sensor |
| CN102654543A (en) * | 2012-05-23 | 2012-09-05 | 东莞通华液晶有限公司 | Method for testing capacitive touch screens and testing equipment thereof |
| CN102866317A (en) * | 2012-09-24 | 2013-01-09 | 广东欧珀移动通信有限公司 | Method and system for quick test of mobile terminal capacitive touch screen |
| CN102866322A (en) * | 2012-08-29 | 2013-01-09 | 北京集创北方科技有限公司 | Touch device detection method |
| CN202710699U (en) * | 2012-08-02 | 2013-01-30 | 江西联创电子有限公司 | Capacitive type touch screen sensing glass make-and-break test device |
| CN102928675A (en) * | 2012-11-19 | 2013-02-13 | 天津市中环高科技有限公司 | Method for detecting shielding layer of capacitive touch screen |
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2013
- 2013-03-11 CN CN2013100758221A patent/CN103197173A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369205A (en) * | 2007-08-13 | 2009-02-18 | 新唐科技股份有限公司 | Capacitive detection system and method, and time-interval measurement module and method |
| US20120050206A1 (en) * | 2010-08-29 | 2012-03-01 | David Welland | Multi-touch resolve mutual capacitance sensor |
| CN102654543A (en) * | 2012-05-23 | 2012-09-05 | 东莞通华液晶有限公司 | Method for testing capacitive touch screens and testing equipment thereof |
| CN202710699U (en) * | 2012-08-02 | 2013-01-30 | 江西联创电子有限公司 | Capacitive type touch screen sensing glass make-and-break test device |
| CN102866322A (en) * | 2012-08-29 | 2013-01-09 | 北京集创北方科技有限公司 | Touch device detection method |
| CN102866317A (en) * | 2012-09-24 | 2013-01-09 | 广东欧珀移动通信有限公司 | Method and system for quick test of mobile terminal capacitive touch screen |
| CN102928675A (en) * | 2012-11-19 | 2013-02-13 | 天津市中环高科技有限公司 | Method for detecting shielding layer of capacitive touch screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082631A (en) * | 2019-04-29 | 2019-08-02 | 昆山龙腾光电有限公司 | The test method and test device of touch panel |
| CN110082631B (en) * | 2019-04-29 | 2021-08-17 | 昆山龙腾光电股份有限公司 | Test method and test device for touch panel |
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Application publication date: 20130710 |