CN103983867B - For touching, the method for testing of display screen integration screen - Google Patents
For touching, the method for testing of display screen integration screen Download PDFInfo
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- CN103983867B CN103983867B CN201410165596.0A CN201410165596A CN103983867B CN 103983867 B CN103983867 B CN 103983867B CN 201410165596 A CN201410165596 A CN 201410165596A CN 103983867 B CN103983867 B CN 103983867B
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Abstract
The invention discloses a kind of for touching, the adjustment method of display screen integration screen, it concretely comprises the following steps: screening criteria integration screen；Standard integration screen is carried out noise test, collecting test data；Test data are added up, according to the result after statistics, show that the maximum magnitude of noise test indices is as level threshold value；Integrated screen to be measured is carried out noise test, the indices that noise is tested is compared with level threshold value, if indices falls in level threshold value, then noise test passes, otherwise noise test failure.Accuracy of detection of the present invention is high, and implements conveniently, and implementation cost is low, can promote the popularization of integration screen.
Description
Technical field
The present invention relates to test device, particularly relate to a kind of method of testing for TOC.
Background technology
Touch On Cell(is abbreviated as TOC) it is a kind of new touch screen, the product of display screen integration.Make TOC screen
The glass surface plating indium oxide tin film that the operation of curtain has main steps that first on TFT screen (TFT screen)
(ito film), then etches touchscreen pattern, the module FPC designed and touch screen FPC is bundled in the glass of TOC afterwards respectively
On glass, finally post cover plate, install backlight.It has that thickness is thin, intensity is high, good reliability, decoration structure features simple design, be suitable for standard
The advantages such as change, will become one of intelligent terminal's input and output main flow equipment in following 1 to 3 years.
But, current this technology is also in research and advanced development, and yields is not high enough, and relatively conventional full laminating is produced
Product, the risk of interferences of screen is bigger.Producing, during debugging maximum obstacle be that touch screen and display screen lean on too closely,
Receive to display screen interference relatively big, cause debugging upper difficult, it is impossible to produce in enormous quantities, more can not control product jamproof
Concordance and product stability.
Summary of the invention
The invention aims to solve above-mentioned problems of the prior art, propose one and be used for touching, showing
The method of testing of screen integration screen, it is characterised in that comprise the steps:
Step 1: screening criteria integration screen；
Step 2: standard integration screen is carried out noise test, collecting test data；
Step 3: add up test data, according to the result after statistics, draws the maximum of noise test indices
Scope is as level threshold value；
Step 4: integrated screen to be measured is carried out noise test, enters the indices that noise is tested with level threshold value
Row compares, if indices falls in level threshold value, then and noise test passes, otherwise noise test failure.
The present invention is the most ingenious to the detection method of integration screen, and not only detection operation is uncomplicated, low cost, but also
Obviating the interference of display screen well, show through substantial amounts of detection data, the accuracy of detection of the present invention is the highest, almost
99%, solve a detection difficult problem for integration screen, significantly advance the popularization on a large scale of integration screen.
Accompanying drawing explanation
Below, the present invention is described in detail, wherein for comparison accompanying drawing and preferred embodiment:
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the flow chart of screening criteria integration screen of the present invention；
Fig. 3 is the flow chart of noise of the present invention test.
Detailed description of the invention
With embodiment, invention is described in detail below in conjunction with the accompanying drawings.Should be appreciated that the explanation to specific embodiment
Only in order to explain the technical scheme that the present invention proposes, and the non-limiting present invention.
As shown in Figure 1 to Figure 3, proposed by the invention for touching, the method for testing of display screen integration screen, mainly
Step is:
Step 1, screens several standard integration screens.
Need to select several integration screens, then these integration screens are arranged on mobile phone, normally make
With, whether detection integration screen creates noise, if not producing noise, then and can be no as standard integration screen
Being then defective integration screen, be eliminated, standard integration screen preferably selects more than 25, in order to can draw more accurate
True test value scope.
Step 2, carries out noise test, collecting test data to standard integration screen.
Debugging display screen test device and testing device for touch screens so that it is can normally work respectively.Display screen is to lead most
The outut device wanted, touch screen is most important input equipment, and the principle of capacitance touch screen is to visit according to node capacitor variable quantity
Survey the position occurring to touch, and faint electric capacity is highly susceptible to the impact such as medium, high-frequency circuit.The display screen of integration screen
Distance touch screen is nearest, is also maximum interference source, and therefore, display screen is tested device and testing device for touch screens by the present invention
Ground wire links together, and shields the interference that the fluctuation from different benchmark brings.
It follows that unified screen test device and the test benchmark of testing device for touch screens, fixed standard integrated screen
Curtain, connects display screen test device and testing device for touch screens respectively, opens interference source, by the display screen of integration screen
Pure white state is transferred to by IPS screen, and pure black state is transferred to by the TN screen of display screen.
Calibration touch screen, arranges the touch screen rate of scanning under display screen duty, sweeps with calculating and setting by souning out
Retouch frequency.Its principle is: under normal circumstances, it is contemplated that display effect is had an impact by the rate of scanning of display screen, typically sets
After will not go change.So only touch screen frequency being configured.
Under capacitance plate duty, each node capacitor can be abstracted into below equation:
Wherein: Vt represents the voltage of t, V0 is initial voltage, and Vm is saturation voltage, and R is resistance, and C is electric capacity.
In high-velocity scanning circuit, t is converted into frequency representation 1/f, in the absence of a touch, because frequency f has
One initial setting, R, C, Vm, V0 are constants, so relatively fixing full frame node voltage can be formed, by visiting passage
Recording egress electric capacity, node capacitor matrix can transform into, by algorithm, the value that can observe, i.e. Rowdata data are many
The rate of scanning of secondary adjustment touch screen, obtains node capacitor matrix, transforms into Rowdata matrix by algorithm.
When finger touches, because electric capacity is the faintest, the impact of circuit is equivalent to add GND electrode, finger by finger
Dielectric constant and air be different, be equivalent to the electric capacity C value changing in primary circuit.Use and the most the same mode,
Another group can be obtained and touch Rowdata matrix.By previous Rowdata matrix and present touch Rowdata matrix pair
Ratio, draws one group of variance data, both Differ value matrix.Contrast calculates the position that finger touches again, finally by definition, draws
Touch point coordinate.
The reason repeatedly adjusting touch screen rate of scanning is: when the display screen of scanning is fitted in below touch screen, turn over
The polar liquid crystalline substance turned is equivalent to the electrode of a change, and this electrode is coupling with the electrode in touch screen, for eliminating this
The impact of individual coupling electric capacity, needs to change the rate of scanning of touch screen, when this electrode of touch screen is not coupled by display screen or coupling
When group photo rings less, touch screen just goes these electrode charge and discharge and detection capacitance, and this period can calculate, but actual feelings
Condition is complicated, it is therefore proposed that use repeatedly examination to adjust the mode of frequency.
Then the Differ signal jitter of touch screen, the noise of collection touch and signal proportion are extracted.By common
Touch screen developing instrument captures when inputting without outer signals (finger), and the signal intensity situation of touch screen calculates and changes into electricity
The interference semaphore held, calculates interference volume and accounts for the ratio of semaphore.
All standard integration screens are all analyzed its index of correlation through the detailed process of above-mentioned steps 2 by step 3,
Then test data are added up, according to the result after statistics, show that the maximum magnitude of noise test indices is as mark
Quasi-threshold value.
Step 4, carries out noise test to integrated screen to be measured, is entered with level threshold value by the indices that noise is tested
Row compares, if indices falls in level threshold value, then and noise test passes, otherwise noise test failure.
Claims (4)
1. one kind for touching, the method for testing of display screen integration screen, it is characterised in that comprise the steps:
Step 1: screening criteria integration screen；
Step 2: standard integration screen is carried out noise test, collecting test data；
Step 3: add up test data, according to the result after statistics, draws the maximum magnitude of noise test indices
As level threshold value；
Step 4: integrated screen to be measured is carried out noise test, compares the indices that noise is tested with level threshold value
Relatively, if indices falls in level threshold value, then noise test passes, otherwise noise test failure.
2. as claimed in claim 1 for touching, the method for testing of display screen integration screen, it is characterised in that described step
Rapid 1 comprises the steps:
Step 1.1: select several integration screens；
Step 1.2: integration screen is installed to mobile phone, normally uses, whether detection integration screen produces noise,
If not producing noise, then as standard integration screen, it it is otherwise defective integration screen.
3. as claimed in claim 1 for touching, the method for testing of display screen integration screen, it is characterised in that described step
The step that rapid 2 pairs of standard integration screens carry out noise test is:
Step 2.1: debugging display screen test device and testing device for touch screens so that it is can normally work respectively；
Step 2.2: the ground wire that display screen is tested device and testing device for touch screens links together, unified test benchmark；
Step 2.3: fixed standard integration screen, and connect display screen test device and testing device for touch screens respectively, open
Interference source, is transferred to pure white state by the IPS screen of the display screen of integration screen, and pure black state is transferred to by the TN screen of display screen；
Step 2.4: display screen and the rate of scanning of touch screen of standard integration screen are set；
Step 2.5: in the case of not touching, is scanned display screen and touch screen, by channel detection and formula(Vt represents the voltage of t, V0Being initial voltage, Vm is saturation voltage, and R is electricity
Resistance, C is electric capacity) draw the node capacitor of touch screen, repeatedly adjust the rate of scanning of touch screen, form node capacitor matrix, logical
Crossing algorithm and transform into Rowdata matrix, the value of node capacitor matrix is converted into observable Rowdata matrix by described algorithm
Value；
Step 2.6: in the case of touching, display screen and touch screen are scanned, by channel detection and formula(Vt represents the voltage of t, V0Being initial voltage, Vm is saturation voltage, and R is electricity
Resistance, C is electric capacity) draw the node capacitor of touch screen, repeatedly adjust the rate of scanning of touch screen, form node capacitor matrix, logical
Crossing algorithm and transform into touch Rowdata matrix, the value of node capacitor matrix is converted into observable touch by described algorithm
The value of Rowdata matrix；
Rowdata matrix and touch Rowdata matrix are contrasted, draws Differ value matrix；
Step 2.7: the Differ signal jitter of extraction touch screen, the noise of collection touch and signal proportion.
4. as claimed in claim 3 for touching, the method for testing of display screen integration screen, it is characterised in that extraction is touched
Touch the Differ signal jitter number of times of screen more than 30 frames.
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| CN201410165596.0A CN103983867B (en) | 2014-04-23 | 2014-04-23 | For touching, the method for testing of display screen integration screen |
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| CN201410165596.0A CN103983867B (en) | 2014-04-23 | 2014-04-23 | For touching, the method for testing of display screen integration screen |
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| CN103983867B true CN103983867B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110188014A (en) * | 2019-05-29 | 2019-08-30 | 浙江大学 | A kind of anti-interference test method for capacitive touch screen |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238788B (en) * | 2016-03-29 | 2019-12-27 | 深圳市汇顶科技股份有限公司 | Touch chip test system based on matrix capacitor plate and test method thereof |
| CN110383226B (en) * | 2017-12-29 | 2023-01-31 | 深圳市汇顶科技股份有限公司 | Calibration method of node capacitance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215477B1 (en) * | 1997-10-22 | 2001-04-10 | Smart Technologies Inc. | Touch sensitive display panel |
| CN102043536A (en) * | 2009-10-22 | 2011-05-04 | Nec卡西欧移动通信株式会社 | Touch detection device, electronic device and recording medium |
| CN103365469A (en) * | 2013-06-28 | 2013-10-23 | 京东方科技集团股份有限公司 | Method and device for detecting touch points, touch control drive circuit and touch screen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2476671B (en) * | 2010-01-04 | 2014-11-26 | Plastic Logic Ltd | Touch-sensing systems |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215477B1 (en) * | 1997-10-22 | 2001-04-10 | Smart Technologies Inc. | Touch sensitive display panel |
| CN102043536A (en) * | 2009-10-22 | 2011-05-04 | Nec卡西欧移动通信株式会社 | Touch detection device, electronic device and recording medium |
| CN103365469A (en) * | 2013-06-28 | 2013-10-23 | 京东方科技集团股份有限公司 | Method and device for detecting touch points, touch control drive circuit and touch screen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110188014A (en) * | 2019-05-29 | 2019-08-30 | 浙江大学 | A kind of anti-interference test method for capacitive touch screen |
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| CN103983867A (en) | 2014-08-13 |
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