CN115454275A - Quality detection method and device of capacitive touch screen and computer equipment - Google Patents
Quality detection method and device of capacitive touch screen and computer equipment Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04186—Touch location disambiguation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04114—Touch screens adapted for alternating or simultaneous interaction with active pens and passive pointing devices like fingers or passive pens
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Abstract
The application relates to the technical field of capacitive touch screens, and discloses a quality detection method and device of a capacitive touch screen and computer equipment, wherein a preset test image is obtained according to requirements, and the capacitive touch screen is divided into a test area and a non-test area based on the test image, so that only a touch point in the test area is subjected to signal acquisition detection, and signals in the non-test area are not subjected to acquisition detection, so that the operation power consumption of quality detection can be reduced; when signal acquisition is carried out, a plurality of touch signals received by a test area are extracted, effective touch signals are obtained, sensor units covered by the effective touch signals are obtained, report point coordinates of the effective touch signals are obtained, standard coordinates of a test image are obtained, the report point coordinates are compared with the standard coordinates, a reference deviation value is obtained, and if the reference deviation value does not exceed a preset range, the quality of the capacitive touch screen is judged to be qualified; therefore, the testing time can be shortened, and the quality detection efficiency can be improved.
Description
Technical Field
The present disclosure relates to the field of capacitive touch screen technologies, and in particular, to a quality detection method and apparatus for a capacitive touch screen, and a computer device.
Background
With the rapid development of automobile technology, people experience the use of automobiles not only in the texture of driving, but also the vehicle-mounted display system is more and more concerned. Most of vehicle-mounted liquid crystal screens on the market at present are LCD liquid crystal screens. Due to the special use environment of vehicle-mounted display, the screen is generally required to be moisture-proof, dust-proof, anti-glare, high-brightness and visible in sunlight, high-temperature resistant, low-temperature resistant and the like. The vehicle-mounted display products are qualified vehicle-mounted display products by matching with the entity keys.
However, with the development of vehicle-mounted display technology intellectualization, the screen cannot stay at the stage of the entity key, the vehicle-mounted touch screen is rapidly developing at present, and like a series of representatives of new energy vehicle types such as Tesla, michelia, xiaopeng and the like, even all entity keys are abandoned, and a whole vehicle-mounted touch liquid crystal screen is used for integrating all functions, so that the vehicle-mounted touch screen and the vehicle-mounted touch screen are the development trend and the future of vehicle-mounted display.
Most of vehicle-mounted touch screens use a capacitive touch technology, and capacitive touch screens are different from resistive touch screens, so that the greatest advantages are high touch precision, quick response, multi-point touch support and larger screen size support.
However, in the quality detection process of the capacitive touch screen, because a plurality of point locations in the capacitive touch screen need to be tested, and whether the quality of the capacitive touch screen is qualified or not is judged according to the response condition of click feedback in each test, the detection data acquisition amount of the capacitive touch screen is large in the quality detection process, which causes high power consumption of a quality detection system, long test time and low quality detection efficiency.
Disclosure of Invention
The application provides a quality detection system of a capacitive touch screen, and aims to solve the technical problems that in the prior art, the power consumption of the quality detection system of the capacitive touch screen is high, the test time is long, and the quality detection efficiency is low.
The application provides a quality detection method of a capacitive touch screen, which comprises the following steps:
acquiring a test image, and dividing a test area and a non-test area according to the test image;
receiving a plurality of touch signals in the test area, and extracting effective touch signals from the touch signals, wherein the touch signals comprise a first touch signal of a finger and a second touch signal of a test pen point;
acquiring a plurality of sensor units covered by effective touch signals, and acquiring position information of the sensor units to obtain report point coordinates;
acquiring a standard coordinate of a test image;
calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
judging whether the reference deviation value exceeds a preset range or not;
and if the standard deviation value does not exceed the preset range, judging that the quality of the capacitive touch screen is qualified.
Preferably, the step of acquiring the test image and dividing the test area and the non-test area according to the test image includes:
acquiring a first coverage area of the test image in a sensor plane;
obtaining contour line information of the test image;
acquiring a first maximum value of the test image in the X-axis direction and a second maximum value of the test image in the Y-axis direction in the sensor plane according to the contour line information;
calculating a second coverage area of the test image according to the first maximum value and the second maximum value, wherein the calculation formula is as follows:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and,Xwhich represents the first maximum value of the first signal,Yrepresents a second maximum value;
calculating a non-coverage area according to the second coverage area and the first coverage area, wherein a calculation formula is as follows:
S 3 =S 2 -S 1 ；
wherein the content of the first and second substances,S 3 a non-covered area is represented as,S 1 representing a first coverage area;
and marking the non-coverage area as a non-test area, and marking the first coverage area as a test area.
Preferably, the step of receiving a plurality of touch signals in the test area and extracting a valid touch signal from the plurality of touch signals includes:
receiving a plurality of first current values of the first touch signal, and generating a first waveform according to the plurality of first current values;
judging whether the plurality of first touch signals are continuous or not according to the first oscillogram;
if the plurality of first touch signals are not continuous, determining the first touch signals as effective touch signals;
receiving a plurality of second current values of the second touch signals, and generating a second oscillogram according to the second current values;
judging whether the plurality of second touch signals are continuous or not according to the second oscillogram;
and if the plurality of second touch signals are continuous, determining the second touch signals as effective touch signals.
Preferably, the step of acquiring a plurality of sensor units covered by an effective touch signal, and acquiring position information of the plurality of sensor units to obtain report point coordinates includes:
acquiring signal variation amounts of at least two first electrodes of at least two effective touch signals in an X-axis direction and signal variation amounts of at least two second electrodes in a Y-axis direction in a sensor plane;
acquiring position information of a coverage sensor unit according to signal variation of the first electrode signal and the second electrode signal, wherein the position information at least comprises first coordinate information of two X-axis directions and second coordinate information of two Y-axis directions;
judging whether the first coordinate information and the second coordinate information have intersection points or not;
and if the first coordinate information and the second coordinate information have an intersection, using the position information of the intersection as a report point coordinate.
Preferably, the step of calculating a reference deviation value between the report point coordinate and the standard coordinate based on the standard coordinate includes:
acquiring a plurality of report point coordinates;
acquiring a plurality of standard coordinates;
calculating a deviation value according to the report point coordinate and the standard coordinate to obtain a plurality of deviation values, wherein the calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein the content of the first and second substances,（x 3 ，y 3 ）one of the deviation values is represented as,x 2， y 2 which represents the coordinates of one of the points of the newspaper,x 1， y 1 one of the standard coordinates is represented;
and comparing the values of the deviation values, and taking the maximum value of the deviation values as a reference deviation value.
Preferably, after the step of determining that the quality of the capacitive touch screen is qualified if the reference deviation value does not exceed a preset range, the method further includes:
acquiring diameter information of the test pen point;
and storing the diameter information as the sensitivity of the capacitive touch screen.
Preferably, the test image includes at least one of a dotting image, a preset image, and a spiral image.
The present application further provides a quality detection device for a capacitive touch screen, including:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring a test image and dividing a test area and a non-test area according to the test image;
the extraction module is used for receiving a plurality of touch signals in the test area and extracting effective touch signals from the touch signals, wherein the touch signals comprise a first touch signal of a finger and a second touch signal of a test pen point;
the second acquisition module is used for acquiring a plurality of sensor units covered by effective touch signals and acquiring position information of the sensor units to obtain report point coordinates;
the third acquisition module is used for acquiring the standard coordinates of the test image;
the calculation module is used for calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
the judging module is used for judging whether the reference deviation value exceeds a preset range or not;
and the judging module is used for judging that the quality of the capacitive touch screen is qualified if the reference deviation value does not exceed a preset range.
The present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.
The present application also provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method.
The beneficial effect of this application does: the method comprises the steps of obtaining a preset test image according to requirements, and dividing the capacitive touch screen into a test area and a non-test area based on the test image, so that only touch points in the test area are subjected to signal acquisition and detection, signals in the non-test area are not subjected to acquisition and detection, and therefore the operation power consumption of quality detection can be reduced; when signal acquisition is carried out, a plurality of touch signals received by a test area are extracted from effective touch signals, sensor units covered by the effective touch signals are obtained, position information of the sensor units is acquired, so that report point coordinates of the effective touch signals on the capacitive touch screen are obtained, standard coordinates of a test image are obtained, the report point coordinates are compared with the standard coordinates, a reference deviation value of the report point coordinates and the standard coordinates is calculated, and if the reference deviation value does not exceed a preset range, the quality of the capacitive touch screen is judged to be qualified; therefore, the quality of the capacitive touch screen can be quickly detected, the testing time is shortened, and the quality detection efficiency is improved.
Drawings
Fig. 1 is a schematic flow chart of a method according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
Fig. 3 is a schematic diagram of an internal structure of a computer device according to an embodiment of the present application.
The implementation, functional features and advantages of the object of the present application will be further explained with reference to the embodiments, and with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1, the present application provides a quality detection method for a capacitive touch screen, including:
s1, obtaining a test image, and dividing a test area and a non-test area according to the test image;
s2, receiving a plurality of touch signals in the test area, and extracting effective touch signals from the touch signals, wherein the touch signals comprise a first touch signal of a finger and a second touch signal of a test pen point;
s3, acquiring a plurality of sensor units covered by effective touch signals, and collecting position information of the sensor units to obtain report point coordinates;
s4, acquiring a standard coordinate of the test image;
s5, calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
s6, judging whether the reference deviation value exceeds a preset range or not;
and S7, if the reference deviation value does not exceed a preset range, judging that the quality of the capacitive touch screen is qualified.
As described in the foregoing steps S1 to S7, in the prior art, when performing quality detection on a capacitive touch screen, there are "infinite" touch points, but a human body has only 10 fingers, and most electronic devices are operated by only one hand, so that even if there are "infinite" touch points on the capacitive touch screen, the "infinite" touch points cannot be fully utilized in practical application, based on which, in order to reduce the operational power consumption of the quality detection and avoid collecting the "infinite" touch points, a preset test image may be obtained first according to a requirement, and the test image is generally and directly displayed in the capacitive touch screen, so that the capacitive touch screen may be divided into a test area and a non-test area based on the test image, so that only the touch points in the test area are subjected to signal acquisition detection, and signals in the non-test area are not subjected to acquisition detection, thereby reducing the operational power consumption of the quality detection; when signal acquisition is carried out, a test area receives a plurality of contact signals, including a first contact signal of a finger and a second contact signal of a test pen point, wherein in order to detect the linearity and the sensitivity of the capacitive touch screen, a test pen head is used for marking a test image, in order to detect the accuracy of the capacitive touch screen, the finger or the test pen head is used for dotting the test image, in order to improve the quality detection efficiency of the capacitive touch screen, the detection of the linearity, the sensitivity and the accuracy is a one-time process, namely, the three are detected at one time, therefore, among a plurality of touch signals received by the test area, some touch signals are used for detecting the linearity and some touch signals are used for detecting the sensitivity, and some touch signals are used for detecting the accuracy, before the signal acquisition, different marks can be carried out on the touch signals of different detection types, after the touch signals of the three are acquired, effective touch signals can be extracted from the effective touch signals according to the marks, namely, only relevant touch signals of the linearity or the sensitivity or the relevant signals of the accuracy are extracted, and besides, the extraction of the detection signals can be carried out according to the detection types of the extracted, and the detection current can be limited, and the detection types of the detection point can be carried out; after the effective touch signal is extracted, the sensor unit covered by the effective touch signal can be obtained, the position information of the sensor unit is collected, and therefore a reporting point coordinate of the effective touch signal on the capacitive touch screen is obtained; therefore, the quality of the capacitive touch screen can be quickly detected, the testing time is shortened, and the quality detection efficiency is improved.
In one embodiment, the step S1 of acquiring a test image and dividing a test area and a non-test area according to the test image includes:
s11, acquiring a first coverage area of the test image in a sensor plane;
s12, obtaining contour line information of the test image;
s13, acquiring a first maximum value of the test image in the X-axis direction and a second maximum value of the test image in the Y-axis direction in the sensor plane according to the contour line information;
s14, calculating a second coverage area of the test image according to the first maximum value and the second maximum value, wherein the calculation formula is as follows:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and,Xwhich is indicative of a first maximum value of,Yrepresents a second maximum value;
s15, calculating a non-coverage area according to the second coverage area and the first coverage area, wherein the calculation formula is as follows:
S 3 =S 2 -S 1 ；
wherein the content of the first and second substances,S 3 a non-covered area is represented as,S 1 representing a first coverage area;
and S16, marking the non-coverage area as a non-test area, and marking the first coverage area as a test area.
As described in the above steps S11 to S16, since the test image is preset according to the detection type, the test image may be a combination of polygons, filled-in types, spirals, or irregular line segments, although the coverage of the test image in the sensor plane is known, when contact signal acquisition is performed, for the convenience of calculation, the coverage area of the test image is usually set in a rectangular form, for example, the test image is in a spiral shape, the coverage area is the area covered by the whole spiral image, when a touch signal is present between two lines, it is also considered to be within the coverage area, therefore, the touch signal between the two lines can be collected, the operation power consumption of quality detection is increased undoubtedly, and based on the method, in order to accurately divide the test area and the non-test area, the first coverage area of the test image on the sensor plane is collected firstly, then the outermost edge contour line information of the test image is obtained, finding the longest extension value in the X-axis direction and the Y-axis direction of the sensor plane according to the contour line information, i.e., the first maximum and the second maximum, so that a coarser test area can be demarcated on the basis of the first maximum and the second maximum, i.e., the second coverage area, the first coverage area is covered with the second coverage area by an overlay coverage measurement method, and the portion of the overlap is subtracted, the non-coverage area may be calculated, the non-coverage area set as the non-test area, and the overlapping coverage area (first coverage area) set as the test area, such that when the touch signal is in the non-test area, the method can not collect the data, thereby reducing the collection quantity and the operation power consumption of quality detection.
In one embodiment, the step S2 of receiving a plurality of touch signals in the test area and extracting a valid touch signal from the plurality of touch signals includes:
s21, receiving a plurality of first current values of the first touch signals, and generating a first oscillogram according to the plurality of first current values;
s22, judging whether the first touch signals are continuous or not according to the first oscillogram;
s23, if the plurality of first touch signals are not continuous, determining the first touch signals as effective touch signals;
s24, receiving a plurality of second current values of the second touch signals, and generating a second oscillogram according to the second current values;
s25, judging whether the plurality of second touch signals are continuous or not according to the second oscillogram;
and S26, if the plurality of second touch signals are continuous, determining the second touch signals as effective touch signals.
As described in the foregoing steps S21 to S26, when the capacitive touch screen is in operation, the sensor electrode generates a uniform electric field, and due to the effect of the coupling capacitance of the human body, when a test area contacts a touch signal, the current is absorbed, so as to change the current, voltage, and frequency characteristics of a chip inside the capacitive touch screen, a sine wave generator is generally disposed inside the chip, and current values of respective clicks of the capacitive touch screen are different, and since the first touch signal mainly detects the accuracy of the capacitive touch screen, the first touch signal is generally a dotting operation, and the first touch signal is generally discontinuous, but it is also possible that in order to seek speed, a plurality of points are dotted into a line segment during the dotting operation, and therefore, in this embodiment, after receiving the first current value of the first touch signal, a first waveform diagram may be generated by the sine wave generator, so as to determine whether the dotting operation is continuous according to the first waveform diagram, and if not, it is represented as a continuous, the current dotting operation, the first touch signal corresponding to the first waveform diagram may be determined as a valid touch signal, so that the first touch signal of the line segment is a touch signal is a valid touch signal, and the quality of the touch signal is correctly detected; when the second touch signal is received, just opposite to the first touch signal, the second touch signal is generally a scribing operation, that is, a continuous operation, so that whether the second touch signal is continuous or not can be judged through the second waveform diagram, if the second touch signal is continuous, the second touch signal indicates that the second touch signal is currently the scribing operation, and the second touch signal can be judged to be a valid contact signal.
In an embodiment, the step S3 of acquiring a plurality of sensor units covered by an effective touch signal, and acquiring position information of the plurality of sensor units to obtain a report point coordinate includes:
s31, acquiring signal variation of at least two first electrodes of at least two effective touch signals in the X-axis direction and signal variation of at least two second electrodes in the Y-axis direction in a sensor plane;
s32, acquiring position information of a coverage sensor unit according to signal variation of the first electrode signal and the second electrode signal, wherein the position information at least comprises first coordinate information of two X-axis directions and second coordinate information of two Y-axis directions;
s33, judging whether the first coordinate information and the second coordinate information have intersection points or not;
and S34, if the first coordinate information and the second coordinate information have an intersection, using the position information of the intersection as a report point coordinate.
As described in the above steps S31 to S34, the capacitance sensor is composed of a plurality of metal electrodes distributed in an array, and during operation, the electrode is used as one electrode plate of the sensing capacitor, and the effective contact signal is used as the other electrode plate, because the size of the sensing capacitor is in direct proportion to the distance between the two electrode plates, when the effective contact signal approaches the metal electrode on the capacitance touch pad, the sensing capacitance will change, and the contact information of the effective contact signal can be obtained by measuring the signal variation of the sensing capacitance; therefore, when the sensor units covered by the effective touch signals are acquired, in order to know which are accurately covered and which are not covered or not covered completely, at least two effective touch signals are preset at the moment, the positions of the sensor units which are likely to be touched can be known by acquiring the signal variation of at least 2 first electrodes of the at least two effective touch signals on the X axis and the signal variation of at least 2 second electrodes of the at least two effective touch signals on the Y axis in the sensor plane through the signal variation of each electrode, that is, at least 4 sensor units which are likely to be touched can be determined, the coordinate information of each sensor unit is acquired, whether a cross point exists in the coordinate information is judged, if so, the cross point is the accurate position of the covered sensor unit, and therefore the position information can be used as a report point coordinate.
In one embodiment, the step S5 of calculating a reference deviation value between the report coordinate and the standard coordinate according to the standard coordinate includes:
s51, acquiring a plurality of report point coordinates;
s52, acquiring a plurality of standard coordinates;
s53, calculating deviation values according to the report point coordinates and the standard coordinates to obtain a plurality of deviation values, wherein the calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein the content of the first and second substances,（x 3 ，y 3 ）one of the deviation values is represented as,x 2， y 2 which represents the coordinates of one of the points of the newspaper,x 1， y 1 one of the standard coordinates is represented;
and S54, comparing the values of the deviation values, and taking the maximum value of the deviation values as a reference deviation value.
As described in steps S51 to S54, by obtaining a plurality of report coordinates and a plurality of standard coordinates, a plurality of deviation values can be calculated, and if each deviation value is compared with a preset range, the calculation loss is undoubtedly increased, so that in this embodiment, after obtaining a plurality of deviation values, the magnitude of the deviation value is compared, and the deviation value is the largest, so that only the reference deviation value needs to be compared with the preset range, the calculation loss is reduced, and the detection quality of the capacitive touch screen can be better checked.
In an embodiment, after the step of determining that the quality of the capacitive touch screen is qualified S7 if the reference deviation value does not exceed the preset range, the method further includes:
s71, obtaining diameter information of the test pen point;
and S72, storing the diameter information as the sensitivity of the capacitive touch screen.
As described in the above steps S71-S72, the test pen head with a diameter of 2mm may be used to test the sensitivity, if the test pen head with a diameter of 2mm has a determination result of the capacitive touch screen that is not qualified, the test pen head may be replaced with 1mm to perform the detection until the determination result of the capacitive touch screen is qualified, and finally the diameter information of the test pen head is stored as the sensitivity, so that the user can conveniently know the sensitivity of each capacitive touch screen, and can conveniently select the capacitive touch screen meeting the self-demand.
In one embodiment, the test image includes at least one of a dotting image, a preset image, and a spiral image.
The application also provides a quality detection device of capacitive touch screen, including:
the device comprises a first acquisition module 1, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring a test image and dividing a test area and a non-test area according to the test image;
the extraction module 2 is configured to receive a plurality of touch signals in the test area and extract a valid touch signal from the plurality of touch signals, where the plurality of touch signals include a first touch signal of a finger and a second touch signal of the test pen point;
the second acquisition module 3 is configured to acquire a plurality of sensor units covered by an effective touch signal, and acquire position information of the plurality of sensor units to obtain a report point coordinate;
the third acquisition module 4 is used for acquiring the standard coordinates of the test image;
the calculating module 5 is used for calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
the judging module 6 is used for judging whether the reference deviation value exceeds a preset range or not;
and the judging module 7 is used for judging that the quality of the capacitive touch screen is qualified if the reference deviation value does not exceed a preset range.
In one embodiment, the first obtaining module 1 includes:
the acquisition unit is used for acquiring a first coverage area of the test image in a sensor plane;
a first obtaining unit configured to obtain contour line information of the test image;
the second acquisition unit is used for acquiring a first maximum value of the test image in the X-axis direction and a second maximum value of the test image in the Y-axis direction in the sensor plane according to the contour line information;
a first calculating unit, configured to calculate a second coverage area of the test image according to the first maximum value and the second maximum value, where the calculation formula is:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and,Xwhich represents the first maximum value of the first signal,Yrepresents a second maximum value;
a second calculating unit, configured to calculate a non-coverage area according to the second coverage area and the first coverage area, where the calculation formula is:
S 3 =S 2 -S 1 ；
wherein the content of the first and second substances,S 3 a non-covered area is represented as,S 1 representing a first coverage area;
and the marking unit is used for marking the non-coverage area as a non-test area and marking the first coverage area as a test area.
In one embodiment, the extraction module 2 includes:
the receiving unit is used for receiving a plurality of first current values of the first touch signals and generating a first oscillogram according to the plurality of first current values;
the first judging unit is used for judging whether the first touch signals are continuous or not according to the first oscillogram;
a first determination unit configured to determine that the plurality of first touch signals are valid touch signals if the plurality of first touch signals are not continuous;
the second receiving unit is used for receiving a plurality of second current values of the second touch signals and generating a second oscillogram according to the second current values;
the second judging unit is used for judging whether the plurality of second touch signals are continuous or not according to the second oscillogram;
and a second determination unit configured to determine that the plurality of second touch signals are valid touch signals if the plurality of second touch signals are continuous.
In one embodiment, the second obtaining module 3 includes:
a third acquiring unit, configured to acquire signal variation amounts of at least two first electrodes of the at least two effective touch signals in an X-axis direction and signal variation amounts of at least two second electrodes in a Y-axis direction in a sensor plane;
a fourth acquiring unit, configured to acquire position information covering the sensor unit according to signal variation amounts of the first electrode signal and the second electrode signal, where the position information at least includes first coordinate information in two X-axis directions and second coordinate information in two Y-axis directions;
a third judging unit configured to judge whether there is an intersection in the first coordinate information and the second coordinate information;
and the report point coordinate unit is used for taking the position information of the cross point as report point coordinates if the cross point exists between the first coordinate information and the second coordinate information.
In one embodiment, the calculation module 5 includes:
a fifth acquiring unit, configured to acquire a plurality of report point coordinates;
a sixth acquisition unit configured to acquire a plurality of standard coordinates;
a third calculating unit, configured to calculate a deviation value according to the report point coordinate and the standard coordinate, so as to obtain a plurality of deviation values, where a calculation formula is:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein the content of the first and second substances,（x 3 ，y 3 ）one of the deviation values is represented as,x 2， y 2 which represents the coordinates of one of the points of the newspaper,x 1， y 1 one of the standard coordinates is represented;
and the comparison unit is used for carrying out numerical comparison on the deviation values and taking the maximum value in the deviation values as the reference deviation value.
In one embodiment, the quality detection apparatus for a capacitive touch screen further includes:
the fourth acquisition module is used for acquiring the diameter information of the test pen point;
and the storage module is used for storing the diameter information as the sensitivity of the capacitive touch screen.
In one embodiment, the test image includes at least one of a dotting image, a preset image, and a spiral image.
The modules, units, and sub-units are all used for correspondingly executing each step in the quality detection method of the capacitive touch screen, and specific implementation manners thereof are described with reference to the method embodiments and are not described herein again.
As shown in fig. 3, the present application further provides a computer device, which may be a server, and the internal structure of the computer device may be as shown in fig. 3. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the computer designed processor is used to provide computational and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The memory provides an environment for the operating system and the running of computer programs in the non-volatile storage medium. The database of the computer device is used to store all data required by the process of the quality detection method of the capacitive touch screen. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of quality detection for a capacitive touch screen.
It will be understood by those skilled in the art that the structure shown in fig. 3 is only a block diagram of a part of the structure related to the present application, and does not constitute a limitation to the computer device to which the present application is applied.
An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for detecting the quality of the capacitive touch screen is implemented.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware associated with instructions of a computer program, which may be stored on a non-volatile computer-readable storage medium, and when executed, may include processes of the above embodiments of the methods. Any reference to memory, storage, database or other medium provided herein and used in the examples may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (SSRDRAM), enhanced SDRAM (ESDRAM), synchronous Link (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM), among others.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, apparatus, article, or method comprising the element.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all the equivalent structures or equivalent processes that can be directly or indirectly applied to other related technical fields by using the contents of the specification and the drawings of the present application are also included in the scope of the present application.
Claims (10)
1. A quality detection method of a capacitive touch screen is characterized by comprising the following steps:
acquiring a test image, and dividing a test area and a non-test area according to the test image;
receiving a plurality of touch signals in the test area, and extracting effective touch signals from the touch signals, wherein the touch signals comprise a first touch signal of a finger and a second touch signal of a test pen point;
acquiring a plurality of sensor units covered by effective touch signals, and acquiring position information of the sensor units to obtain report point coordinates;
acquiring a standard coordinate of a test image;
calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
judging whether the reference deviation value exceeds a preset range or not;
and if the reference deviation value does not exceed the preset range, judging that the quality of the capacitive touch screen is qualified.
2. The method for detecting the quality of the capacitive touch screen according to claim 1, wherein the step of acquiring the test image and dividing the test area and the non-test area according to the test image comprises:
acquiring a first coverage area of the test image in a sensor plane;
obtaining contour line information of the test image;
acquiring a first maximum value of the test image in the X-axis direction and a second maximum value of the test image in the Y-axis direction in the sensor plane according to the contour line information;
calculating a second coverage area of the test image according to the first maximum value and the second maximum value, wherein the calculation formula is as follows:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and,Xwhich is indicative of a first maximum value of,Yrepresents a second maximum value;
calculating a non-coverage area according to the second coverage area and the first coverage area, wherein a calculation formula is as follows:
S 3 =S 2 -S 1 ；
wherein the content of the first and second substances,S 3 a non-covered area is represented as,S 1 representing a first coverage area;
and marking the non-coverage area as a non-test area, and marking the first coverage area as a test area.
3. The method of claim 1, wherein the step of receiving a plurality of touch signals in the test area and extracting valid touch signals from the plurality of touch signals comprises:
receiving a plurality of first current values of the first touch signals, and generating a first waveform chart according to the plurality of first current values;
judging whether the plurality of first touch signals are continuous or not according to the first oscillogram;
if the plurality of first touch signals are not continuous, determining the first touch signals as effective touch signals;
receiving a plurality of second current values of the second touch signals, and generating a second oscillogram according to the second current values;
judging whether the plurality of second touch signals are continuous or not according to the second oscillogram;
and if the plurality of second touch signals are continuous, determining the second touch signals as effective touch signals.
4. The method for detecting the quality of the capacitive touch screen according to claim 1, wherein the step of acquiring the plurality of sensor units covered by the effective touch signal and acquiring the position information of the plurality of sensor units to obtain the report point coordinates comprises:
acquiring signal variation amounts of at least two first electrodes of at least two effective touch signals in an X-axis direction and signal variation amounts of at least two second electrodes in a Y-axis direction in a sensor plane;
acquiring position information of a coverage sensor unit according to signal variation of the first electrode signal and the second electrode signal, wherein the position information at least comprises first coordinate information of two X-axis directions and second coordinate information of two Y-axis directions;
judging whether the first coordinate information and the second coordinate information have intersection points or not;
and if the first coordinate information and the second coordinate information have a cross point, taking the position information of the cross point as a report point coordinate.
5. The method as claimed in claim 1, wherein the step of calculating the reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate comprises:
acquiring a plurality of report point coordinates;
acquiring a plurality of standard coordinates;
calculating deviation values according to the report point coordinates and the standard coordinates to obtain a plurality of deviation values, wherein the calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein the content of the first and second substances,（x 3 ，y 3 ）one of the deviation values is represented as,x 2， y 2 which represents the coordinates of one of the points of the newspaper,x 1， y 1 one of the standard coordinates is represented;
and comparing the values of the deviation values, and taking the maximum value of the deviation values as a reference deviation value.
6. The method as claimed in claim 1, wherein if the reference deviation value does not exceed a predetermined range, the method further comprises, after the step of determining that the quality of the capacitive touch screen is qualified:
acquiring diameter information of the test pen point;
and storing the diameter information as the sensitivity of the capacitive touch screen.
7. The method as claimed in claim 1, wherein the test image includes at least one of a dotting image, a preset image and a spiral image.
8. A quality detection device of a capacitive touch screen is characterized by comprising:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring a test image and dividing a test area and a non-test area according to the test image;
the extraction module is used for receiving a plurality of touch signals in the test area and extracting effective touch signals from the touch signals, wherein the touch signals comprise a first touch signal of a finger and a second touch signal of a test pen point;
the second acquisition module is used for acquiring a plurality of sensor units covered by effective touch signals and acquiring position information of the sensor units to obtain report point coordinates;
the third acquisition module is used for acquiring the standard coordinates of the test image;
the calculation module is used for calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
the judging module is used for judging whether the reference deviation value exceeds a preset range or not;
and the judging module is used for judging that the quality of the capacitive touch screen is qualified if the reference deviation value does not exceed a preset range.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program performs the steps of the method according to any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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