CN109521291A - A kind of detection device and method of capacitive touch screen - Google Patents
A kind of detection device and method of capacitive touch screen Download PDFInfo
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- CN109521291A CN109521291A CN201811286424.3A CN201811286424A CN109521291A CN 109521291 A CN109521291 A CN 109521291A CN 201811286424 A CN201811286424 A CN 201811286424A CN 109521291 A CN109521291 A CN 109521291A
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- touch screen
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- processing module
- detection device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a kind of detection devices of capacitive touch screen, including processing module, for sending control command and processing detection signal and the drive module connecting with processing module, detection module for driving touch screen to be measured and forming detection signal according to the electric current of touch screen electrode outflow and connect with processing module, it is handled for receiving detection signal and being sent to processing module, and the display module being connect with processing module, for showing the detection image as made of the processing result conversion of detection signal, and the power module being connect with processing module, for providing power supply for touch screen to be measured and detection device.The invention has the advantages that: by individual driving equipment and display equipment, it can detect the outside of touch screen to be measured and the fault point of inside, improve detection accuracy, and only need simply fitting driving, it can intuitively observe specific fault point, operating process is simple, improves detection speed.
Description
Technical field
The present invention relates to touch screen detection technique fields, and in particular to a kind of detection device of capacitive touch screen and side
Method.
Background technique
It mainly include capacitive touch screen and electric resistance touch screen in touch screen, generally, capacitive touch screen includes one piece four
Layer compound glass screen, there is at least one layer of ITO (Indium tin oxide, tin indium oxide) coating in compound glass screen, outermost
Layer is a thin layer silica protective layer for glass.Wherein, the ITO coating forms the touch-control of the capacitance touch screen as working face
Electrode layer.When finger touches, due to human body electric field, user and touch screen surface are formed with a coupled capacitor, described in change
The induced current on induction electrode in touch control electrode layer.By comparing induced current size so that it is determined that touch point position.
The foreign matter that residual has electrostatic charge, such as grease are easy on capacitive touch screen external screen, the foreign matter through a long time
The input signal that touch screen reception contact etc. will be will affect after accumulation, so that the partial region of touch screen is failed, to influence to use
Family experience.However some foreign matter naked eyes are difficult to recognize, it is therefore desirable to be detected and be cleared up to it.
For this purpose, providing a kind of foreign matter detecting method of touch screen in the file of Publication No. CN103645822A, still
This method detection process is more complicated, and the precision detected is not good enough, in addition, cannot detect in touch screen on conductive inductive layer
Whether there is foreign matter or whether contact is normal.
Summary of the invention
Technical problem to be solved by the present invention lies in the detection device and method of a kind of capacitive touch screen is provided, solve
Traditional detection method detection process of having determined is complicated, the lower defect of accuracy in detection.
The technical problems to be solved by the invention are realized using following technical scheme:
A kind of detection device of capacitive touch screen, including
Processing module, for send control command and processing detection signal and
The drive module being connect with processing module, the electric current for driving touch screen to be measured and being flowed out according to touch screen electrode
Formed detection signal and
The detection module connecting with processing module is handled for receiving detection signal and being sent to processing module, with
And
The display module connecting with processing module detects figure as made of the processing result conversion of detection signal for showing
Picture, and
The power module being connect with processing module, for providing power supply for touch screen to be measured and detection device.
Further improvement lies in that the control command includes the opening and closing order of drive module, and adjust power supply
The adjusting of module for power supply amount.
Further improvement lies in that the drive module is made of multiple drive blocks, and each drive block is equipped with induction
Plane.
Further improvement lies in that the induction planes are in rectangle, and it is made of conductor material.
Further improvement lies in that the processing module includes sequentially connected current sensor, single-chip microcontroller and signal conversion
Device.
Further improvement lies in that the detection image is made of the colour cell of different-colour, and each colour cell
Colour temperature is corresponding with the current value that touch screen electrode in detection process flows out.
A kind of detection method of capacitive touch screen, comprising the following steps:
Drive module is fitted on touch screen to be measured, processing module sends the opening order of drive module, power module
Start to power, so that touch screen initially receives the touching signals of drive module；
Detection module detects the current value of touch screen electrode outflow, converts thereof into color temperature signal by processing module,
And detection image is shown on the display module, judge whether just touch screen in drive module contact area according to detection image
Often.
The beneficial effects of the present invention are: can detect touch screen to be measured by individual driving equipment and display equipment
The fault point in outside and inside improves detection accuracy, and only needs simply fitting driving, can intuitively observe specific
Fault point, operating process is simple, improves detection speed.
Detailed description of the invention
Fig. 1 is systematic schematic diagram of the invention；
Fig. 2 is flow chart of the method for the present invention；
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
As shown in Figure 1, a kind of detection device of capacitive touch screen, including
Processing module, for send control command and processing detection signal and
The drive module being connect with processing module, the electric current for driving touch screen to be measured and being flowed out according to touch screen electrode
Formed detection signal and
The detection module connecting with processing module is handled for receiving detection signal and being sent to processing module, with
And
The display module connecting with processing module detects figure as made of the processing result conversion of detection signal for showing
Picture, and
The power module being connect with processing module, for providing power supply for touch screen to be measured and detection device.
Above-mentioned control command includes the opening and closing order of drive module, and adjusts the tune of power module power supply volume
Section.
Wherein, drive module is made of multiple drive blocks, and each drive block is equipped with induction planes, and induction planes are in
Rectangle, and be made of conductor material.When work, induction planes can be fitted in the surface of touch screen, although touch-control effect cannot be played
Fruit, but the capacitance of touch screen induction conductive layer in the region of contact can be made to change, the signal code changed in this way
It can be flowed out from touch electrode, and processing module is sent to by detection module collection.
Processing module includes sequentially connected current sensor, single-chip microcontroller and signal adapter.Signal adapter can basis
The program of single-chip microcontroller is arranged, and current value is converted into the difference of colour temperature, for example, electric current is bigger, colour temperature is higher, the face shown
Color is with regard to inclined warm tones.The whether faulty point of the touch screen of corresponding position on screen can be significantly found out in this way.
Detection image is made of the colour cell of different-colour, and is touched in the colour temperature and detection process of each colour cell
The current value for shielding electrode outflow is corresponding.Also, what detection image was just shown is exactly the region of induction planes contact, detection image
The coordinate of upper each point is corresponding with the coordinate put in induction planes contact area.
As shown in Fig. 2, a kind of detection method of capacitive touch screen, comprising the following steps:
Firstly, drive module is fitted on touch screen to be measured, processing module sends the opening order of drive module, power supply
Module starts to power, so that touch screen initially receives the touching signals of drive module；
It is then detected that module detects the current value of touch screen electrode outflow, colour temperature is converted thereof by processing module
Signal, and detection image is shown on the display module, judge that touch screen is in drive module contact area according to detection image
It is no normal.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention only illustrates the present invention not by the exemplary limitation of above-mentioned implementation described in above-mentioned implementation example and specification
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (7)
1. a kind of detection device of capacitive touch screen, it is characterised in that: including
Processing module, for send control command and processing detection signal and
The drive module being connect with processing module, for driving touch screen to be measured and being formed according to the electric current that touch screen electrode flows out
Detect signal and
The detection module connecting with processing module is handled for receiving detection signal and being sent to processing module, and
The display module being connect with processing module, for showing the detection image as made of the processing result conversion of detection signal,
And
The power module being connect with processing module, for providing power supply for touch screen to be measured and detection device.
2. a kind of detection device of capacitive touch screen according to claim 1, it is characterised in that: the control command packet
The opening and closing order of drive module is included, and adjusts the adjusting of power module power supply volume.
3. a kind of detection device of capacitive touch screen according to claim 1, it is characterised in that: the drive module by
Multiple drive block compositions, and each drive block is equipped with induction planes.
4. a kind of detection device of capacitive touch screen according to claim 3, it is characterised in that: the induction planes are in
Rectangle, and be made of conductor material.
5. a kind of detection device of capacitive touch screen according to claim 1, it is characterised in that: the processing module packet
Include sequentially connected current sensor, single-chip microcontroller and signal adapter.
6. a kind of detection device of capacitive touch screen according to claim 1, it is characterised in that: the detection image by
The colour cell of different-colour forms, and the current value that touch screen electrode flows out in the colour temperature and detection process of each colour cell
It is corresponding.
7. a kind of detection method of capacitive touch screen, which comprises the following steps:
Drive module is fitted on touch screen to be measured, processing module sends the opening order of drive module, and power module starts
Power supply, so that touch screen initially receives the touching signals of drive module；
Detection module detects the current value of touch screen electrode outflow, converts thereof into color temperature signal by processing module, and
Detection image is shown on display module, judges whether touch screen is normal in drive module contact area according to detection image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286424.3A CN109521291A (en) | 2018-10-31 | 2018-10-31 | A kind of detection device and method of capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286424.3A CN109521291A (en) | 2018-10-31 | 2018-10-31 | A kind of detection device and method of capacitive touch screen |
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| Publication Number | Publication Date |
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| CN109521291A true CN109521291A (en) | 2019-03-26 |
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| CN201811286424.3A Pending CN109521291A (en) | 2018-10-31 | 2018-10-31 | A kind of detection device and method of capacitive touch screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858390A (en) * | 2020-12-31 | 2021-05-28 | 云谷（固安）科技有限公司 | Foreign matter testing device and foreign matter testing method |
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Application publication date: 20190326 |