CN115454275B - Quality detection method and device for capacitive touch screen and computer equipment - Google Patents
Quality detection method and device for capacitive touch screen and computer equipment Download PDFInfo
- Publication number
- CN115454275B CN115454275B CN202211136492.8A CN202211136492A CN115454275B CN 115454275 B CN115454275 B CN 115454275B CN 202211136492 A CN202211136492 A CN 202211136492A CN 115454275 B CN115454275 B CN 115454275B
- Authority
- CN
- China
- Prior art keywords
- test
- acquiring
- touch signals
- coverage area
- test image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The application relates to the technical field of capacitive touch screens, and discloses a quality detection method, a quality detection device and computer equipment of a capacitive touch screen, wherein a preset test image is acquired 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 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, so that the operation power consumption of quality detection can be reduced; when the signal is acquired, a plurality of touch signals received by a test area are extracted, sensor units covered by the effective touch signals are obtained, point coordinates of the effective touch signals are obtained, standard coordinates of a test image are obtained, the 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; thus, the test 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 screens, and in particular, to a method and an apparatus for detecting quality of a capacitive touch screen, and a computer device.
Background
With the rapid development of automobile technology, people experience the automobile not only in the sense of driving texture, but also in-vehicle display systems are receiving more attention. Most of the on-board liquid crystal displays on the market are LCD liquid crystal displays. Because of the special use environment of the vehicle-mounted display, the screen is generally required to be dampproof, dustproof, anti-glare, visible in high-brightness sunlight, high-temperature resistant, low-temperature resistant and the like. These can be said to be the most basic requirement for vehicle-mounted display, and the qualified vehicle-mounted display product is obtained by matching with the entity keys.
However, with the development of the intellectualization of the vehicle-mounted display technology, the screen cannot stay at the stage of the physical keys, the vehicle-mounted touch screen is currently rapidly developed, and a series of new energy vehicle types such as tesla, fruit, and hillside are represented, even all the physical keys are abandoned, and all functions are integrated by using a whole vehicle-mounted touch liquid crystal screen, 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 the capacitive touch screens are different from resistive touch screens, and have the greatest advantages of high touch precision, quick response, support of multi-point touch and support of larger screen size.
However, in the quality detection process of the capacitive touch screen, as a plurality of point positions in the capacitive touch screen are required to be tested, whether the quality of the capacitive touch screen is qualified or not is judged through the response condition of clicking feedback during each test, the capacitive touch screen has larger detection data acquisition amount during the quality detection process, so that the power consumption of a quality detection system is higher, the test time is longer, and the quality detection efficiency is lower.
Disclosure of Invention
The application provides a quality detection system of capacitive touch screen, and aims to solve the technical problems that in the prior art, the power consumption of the quality detection system of capacitive touch screen is higher, the test time is longer, and the efficiency of quality detection is lower.
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 plurality of touch signals, wherein the plurality of 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 plurality of sensor units to obtain report point coordinates;
obtaining standard coordinates of a test image;
calculating a reference deviation value between the point reporting 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.
Preferably, the step of acquiring a test image and dividing a test area and a non-test area according to the test image includes:
acquiring a first coverage area of the test image in a sensor plane;
acquiring 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 a sensor plane according to the contour line information;
and calculating a second coverage area of the test image according to the first maximum value and the second maximum value, wherein a calculation formula is as follows:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and is indicated,Xa first maximum value is indicated and a second maximum value is indicated,Yrepresenting a second maximum;
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 liquid crystal display device comprises a liquid crystal display device,S 3 indicating that the area is not covered by a layer,S 1 representing a first coverage area;
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 valid touch signals from the plurality of touch signals includes:
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 first touch signals are continuous or not according to the first waveform diagram;
if the plurality of first touch signals are not continuous, judging the first touch signals as effective touch signals;
receiving a plurality of second current values of the second touch signals, and generating a second waveform chart according to the second current values;
judging whether the plurality of second touch signals are continuous or not according to the second waveform diagram;
if the plurality of second touch signals are continuous, the second touch signals are determined to be valid touch signals.
Preferably, the step of acquiring a plurality of sensor units covered by the valid touch signal and acquiring position information of the plurality of sensor units to obtain a point coordinate includes:
acquiring signal variation amounts of at least two first electrodes of at least two effective touch signals in the X-axis direction and signal variation amounts of at least two second electrodes in the Y-axis direction in a sensor plane;
acquiring position information of a coverage sensor unit according to the 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 crossing points or not;
and if the first coordinate information and the second coordinate information have the intersection point, taking the position information of the intersection point as the reporting point coordinate.
Preferably, the step of calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate includes:
acquiring a plurality of report coordinates;
obtaining 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 a calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein, the liquid crystal display device comprises a liquid crystal display device,（x 3 ，y 3 ）representing one of the deviation values,x 2， y 2 one of the coordinates of the reporting points is indicated,x 1， y 1 representing one of the standard coordinates;
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 acceptable, if the reference deviation value does not exceed the preset range, the method further includes:
acquiring diameter information of a test pen point;
and saving 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 line image.
The application also provides a quality detection device of capacitive touch screen, including:
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 the effective touch signals and acquiring the position information of the plurality of sensor units to obtain point coordinates;
the third acquisition module is used for acquiring 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 the preset range.
The present application also provides a computer device comprising a memory storing a computer program and a processor implementing 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 executed by a processor performs the steps of the above method.
The beneficial effects of this application are: acquiring a preset test image according to requirements, dividing the capacitive touch screen 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 the signals in the non-test area are not subjected to acquisition detection, thereby reducing the operation power consumption of quality detection; when the signals are collected, a plurality of touch signals received by a test area are extracted, sensor units covered by the effective touch signals are obtained, position information of the sensor units is collected, so that point reporting coordinates of the effective touch signals on a capacitive touch screen are obtained, standard coordinates of a test image are obtained, the point reporting coordinates are compared with the standard coordinates, reference deviation values of the point reporting coordinates and the standard coordinates are calculated, and if the reference deviation values do 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 rapidly detected, the testing time is shortened, and the quality detection efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method according to an embodiment of the present application.
Fig. 2 is a schematic diagram of an apparatus structure 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 realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As shown in fig. 1, the present application provides a quality detection method of a capacitive touch screen, including:
s1, acquiring 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 plurality of touch signals, wherein the plurality of 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 acquiring position information of the plurality of sensor units to obtain point coordinates;
s4, acquiring standard coordinates 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 the preset range, judging that the quality of the capacitive touch screen is qualified.
As described in the above steps S1-S7, in the prior art, when the capacitive touch screen performs quality detection, there are "infinite" touch points, but the human body has only 10 fingers, and most of the electronic devices are operated by only one hand, so even if the capacitive touch screen has "infinite" touch points, the capacitive touch screen cannot be fully utilized in practical application, based on this, in order to reduce the operation power consumption of quality detection, the acquisition of the "infinite" touch points is avoided, and the preset test image can be acquired according to the requirement, and the test image is generally directly displayed in the capacitive touch screen, so that the capacitive touch screen can be divided into a test area and a non-test area based on the test image, and thus only the touch points in the test area are subjected to signal acquisition detection, and the signals in the non-test area are not subjected to acquisition detection, thereby reducing the operation power consumption of quality detection; when the signal acquisition is carried out, the 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, the test pen point is used for marking a test image, in order to detect the accuracy of the capacitive touch screen, the finger or the test pen point is used for dotting the test image, and in order to improve the quality detection efficiency of the capacitive touch screen, the detection of the linearity, the sensitivity and the accuracy is one-time flow, namely, the three are detected once, therefore, some touch signals are the detection linearity, some touch signals are the detection sensitivity, and some touch signals are the detection accuracy, before the signal acquisition, different marks can be carried out on the touch signals of different detection types, after the three touch signals are acquired, effective touch signals can be extracted from the marks, namely, only the relevant touch signals of the linearity or the sensitivity or the relevant signals of the accuracy can be extracted, and the three types can be extracted according to the detection accuracy, and the detection frequency is not limited, and the type of the three types can be detected; after the effective touch signal is extracted, a sensor unit covered by the effective touch signal can be obtained, and the position information of the sensor unit is acquired, so that the 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 rapidly detected, the testing time is shortened, and the quality detection efficiency is improved.
In one embodiment, the step S1 of acquiring the test image and dividing the test area and the non-test area according to the test image includes:
s11, collecting a first coverage area of the test image in a sensor plane;
s12, acquiring 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 a 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 a calculation formula is as follows:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and is indicated,Xa first maximum value is indicated and a second maximum value is indicated,Yrepresenting a second maximum;
s15, 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 liquid crystal display device comprises a liquid crystal display device,S 3 indicating that the area is not covered by a layer,S 1 representing a first coverage area;
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-S16, since the test image is preset according to the detection type, the test image may be polygonal, filled, spiral or formed by combining irregular line segments, although the coverage area of the test image in the sensor plane is known, when the contact signal is collected, in order to facilitate calculation, the coverage area of the test image is usually set in a rectangular form, for example, the test image is spiral, the coverage area is a region covered by the whole spiral image, when the touch signal exists between two lines, the touch signal is also considered to be in the coverage area, so that the touch signal between two lines is collected, so that the operation power consumption of quality detection is definitely increased, based on this, in order to accurately divide the test area and the non-test area, the first coverage area of the test image is collected first, and then the edge contour line information of the outermost periphery of the test image is obtained, the longest extension value is found in the X-axis direction and the Y-axis direction of the sensor plane according to the contour line information, that is, the first maximum value and the second maximum value are located in the X-axis direction and the Y-axis direction of the first maximum value and the second maximum value are located in the coverage area, when the touch signal exists between two lines, the first coverage area and the non-test area is not located in the coverage area is set, the coverage area is subtracted, so that the number of the non-coverage area can be calculated, and the overlapping coverage area is calculated by subtracting the first coverage area and the first coverage area is calculated, and the operation power consumption of quality detection is reduced.
In one embodiment, the step S2 of receiving a plurality of touch signals in the test area and extracting valid touch signals from the plurality of touch signals includes:
s21, 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;
s22, judging whether the first touch signals are continuous or not according to the first waveform diagram;
s23, if the plurality of first touch signals are not continuous, judging 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 waveform chart according to the second current values;
s25, judging whether the plurality of second touch signals are continuous or not according to the second waveform diagram;
s26, if the plurality of second touch signals are continuous, determining the second touch signals as valid touch signals.
As described in the above steps S21-S26, when the capacitive touch screen works, the sensor electrode will generate a uniform electric field, due to the effect of the coupling capacitance of the human body, when the test area contacts the touch signal, the current will be absorbed, so as to change the current, voltage and frequency directions of the chip inside the capacitive touch screen, a sine wave generator is generally arranged inside the chip, and the current values of the clicks of the capacitive touch screen are different, because the first touch signal is mainly used for detecting the accuracy of the capacitive touch screen, the first touch signal is usually a dotting operation, the first touch signal is usually discontinuous, but in order to pursue the speed, the situation that a plurality of points are punched into line segments may occur in the dotting operation, therefore, in this embodiment, after the first current value of the first touch signal is received, the first waveform diagram can be generated, so that whether the dotting operation is continuous or not is judged according to the first waveform diagram, if not continuous, the current click operation is indicated, the first touch signal corresponding to the first waveform diagram can be judged as the valid touch signal, and thus the valid touch signal can be judged as the valid touch signal, and the valid touch signal can be judged as the valid signal; when the second touch signal is received, the second touch signal is generally a scribing operation, that is, it is a continuous operation, and therefore, whether it is continuous or not can be determined by the second waveform diagram, and if continuous, the second touch signal indicates that the scribing operation is currently performed, and the effective touch signal can be determined.
In one embodiment, the step S3 of acquiring a plurality of sensor units covered by the valid touch signal and acquiring position information of a plurality of sensor units to obtain the report point coordinates includes:
s31, acquiring signal variation amounts of at least two first electrodes of at least two effective touch signals in the X-axis direction and signal variation amounts 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 the 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 crossing points or not;
and S34, if the first coordinate information and the second coordinate information have crossing points, using the position information of the crossing points as report point coordinates.
As described in the above steps S31-S34, the capacitive sensor is formed by a block of metal electrodes distributed in an array, the electrode is used as one plate of the sensing capacitor and the effective contact signal is used as the other plate when in operation, because the size of the sensing capacitor is in direct proportion to the distance between the two plates, when the effective contact signal approaches the metal electrode on the capacitive touch panel, the sensing capacitor changes, and the contact information of the effective contact signal can be obtained by measuring the signal change of the sensing capacitor; therefore, when acquiring the sensor units covered by the effective contact signals, in order to know which are precisely covered and which are uncovered or are not fully covered, at least two effective contact signals are preset at the moment, the signal variation of at least 2 first electrodes of the X axis and the signal variation of at least 2 second electrodes of the Y axis of at least two effective contact signals in a sensor plane can be acquired, the positions of the sensor units which are possibly touched can be known through the signal variation of each electrode, at least 4 sensor units which are possibly touched can be determined, coordinate information of each sensor unit is acquired, and by judging whether an intersection point exists in the coordinate information, if so, the intersection point is the precise position of the covered sensor unit, so that the position information can be used as point coordinates.
In one embodiment, the step S5 of calculating the reference deviation value between the reporting point 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 point coordinates and the standard coordinates to obtain a plurality of deviation values, wherein a calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein, the liquid crystal display device comprises a liquid crystal display device,（x 3 ，y 3 ）representing one of the deviation values,x 2， y 2 one of the coordinates of the reporting points is indicated,x 1， y 1 representing one of the standard coordinates;
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 the above steps S51-S54, by obtaining a plurality of report coordinates and a plurality of standard coordinates, a plurality of offset values may be calculated, if each offset value is compared with a preset range, the calculation loss is definitely increased, so in this embodiment, after obtaining a plurality of offset values, the magnitude of the offset value is compared, and the offset value is the largest as the reference offset value, so that only the reference offset value is compared with the preset range, the calculation loss is reduced, and the detection quality of the capacitive touch screen may be better kept.
In one embodiment, after the step S7 of determining that the quality of the capacitive touch screen is acceptable if the reference deviation value does not exceed the preset range, the method further includes:
s71, acquiring diameter information of a test pen point;
and S72, saving the diameter information as the sensitivity of the capacitive touch screen.
As described in the above steps S71-S72, the sensitivity can be tested by using a test pen tip with a diameter of 2mm, if the test pen tip with a diameter of 2mm is failed, the test pen tip can be replaced with 1mm and then detected until the test pen tip is qualified, and finally the diameter information of the test pen tip is stored as the sensitivity, so that the sensitivity of each capacitive touch screen can be conveniently known, and the capacitive touch screen meeting the self requirements can be conveniently selected by a user.
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 first acquisition module 1 is used for acquiring a test image and dividing a test area and a non-test area according to the test image;
an extracting module 2, configured to receive a plurality of touch signals in the test area, and extract valid touch signals from the plurality of touch signals, where the plurality of touch signals includes a first touch signal of a finger and a second touch signal of a test pen point;
the second acquisition module 3 is used for acquiring a plurality of sensor units covered by the effective touch signals and acquiring the position information of the plurality of sensor units to obtain point coordinates;
the third acquisition module 4 is used for acquiring standard coordinates of the test image;
the calculation module 5 is used for calculating a reference deviation value between the report point coordinate and the standard coordinate according to the standard coordinate;
a judging module 6, configured to judge whether the reference deviation value exceeds a preset range;
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 the preset range.
In one embodiment, the first acquisition module 1 includes:
an acquisition unit for acquiring a first coverage area of the test image in a sensor plane;
the first acquisition unit is used for acquiring contour line information of the test image;
a second acquisition unit configured to acquire a first maximum value of the test image in an X-axis direction and a second maximum value of the test image in a Y-axis direction in a sensor plane according to the contour line information;
the first calculating unit is configured to calculate a second coverage area of the test image according to the first maximum value and the second maximum value, where a calculation formula is:
S 2 =X*Y；
wherein S is 2 A second coverage area is indicated and is indicated,Xa first maximum value is indicated and a second maximum value is indicated,Yrepresenting a second maximum;
the second calculating unit is configured to calculate a non-coverage area according to the second coverage area and the first coverage area, where a calculation formula is:
S 3 =S 2 -S 1 ；
wherein, the liquid crystal display device comprises a liquid crystal display device,S 3 indicating that the area is not covered by a layer,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 comprises:
a receiving unit, configured to receive a plurality of first current values of the first touch signals, and generate a first waveform chart according to the plurality of first current values;
a first judging unit configured to judge whether the plurality of first touch signals are continuous or not according to the first waveform diagram;
a first determination unit configured to determine a plurality of first touch signals as valid touch signals if the first touch signals are not continuous;
a second receiving unit, configured to receive a plurality of second current values of the second touch signals, and generate a second waveform diagram according to the second current values;
a second judging unit configured to judge whether the plurality of second touch signals are continuous or not according to the second waveform diagram;
and a second determination unit configured to determine that the plurality of second touch signals are valid touch signals if the second touch signals are continuous.
In one embodiment, the second obtaining module 3 includes:
a third acquisition 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 acquisition unit configured to acquire position information of the coverage sensor unit according to signal variation amounts of the first electrode signal and the second electrode signal, where the position information includes at least first coordinate information in two X-axis directions and second coordinate information in two Y-axis directions;
a third judging unit for judging whether or not the first coordinate information and the second coordinate information have an intersection;
and the reporting point coordinate unit is used for taking the position information of the crossing point as the reporting point coordinate if the first coordinate information and the second coordinate information have the crossing point.
In one embodiment, the computing module 5 comprises:
a fifth acquisition unit, configured to acquire a plurality of report coordinates;
a sixth acquisition unit configured to acquire a plurality of standard coordinates;
the third calculation unit is configured to calculate an offset value according to the point coordinates and the standard coordinates, so as to obtain a plurality of offset values, where a calculation formula is as follows:
（x 3 ，y 3 ）=（x 2 -x 1 ，y 2 -y 1 ）；
wherein, the liquid crystal display device comprises a liquid crystal display device,（x 3 ，y 3 ）representing one of the deviation values,x 2， y 2 one of the coordinates of the reporting points is indicated,x 1， y 1 representing one of the standard coordinates;
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 a reference deviation value.
In one embodiment, the quality detection device of the 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 above modules, units and sub-units are all configured to correspondingly execute each step in the quality detection method of the capacitive touch screen, and specific implementation manners thereof are described with reference to the above 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 which 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 is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used to store all data required for 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, when executed by a processor, implements a method of quality detection for a capacitive touch screen.
Those skilled in the art will appreciate that the architecture shown in fig. 3 is merely a block diagram of a portion of the architecture in connection with the present application and is not intended to limit 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, where the computer program when executed by a processor implements a quality detection method of any one of the capacitive touch screens described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by hardware associated with a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium provided herein and used in embodiments may include non-volatile and/or volatile memory. The nonvolatile 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 speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus 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 … …" does not exclude the presence of other like elements in a process, apparatus, article or method that comprises the element.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (9)
1. The quality detection method of the capacitive touch screen is characterized by comprising the following steps of:
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 plurality of touch signals, wherein the plurality of 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 plurality of sensor units to obtain report point coordinates;
obtaining standard coordinates of a test image;
calculating a reference deviation value between the point reporting coordinate and the standard coordinate according to the standard coordinate;
judging whether the reference deviation value exceeds a preset range or not;
if the reference deviation value does not exceed the preset range, judging that the quality of the capacitive touch screen is qualified;
the step of acquiring the test image and dividing the test area and the non-test area according to the test image comprises the following steps:
acquiring a first coverage area of the test image in a sensor plane;
acquiring 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 a sensor plane according to the contour line information;
and calculating a second coverage area of the test image according to the first maximum value and the second maximum value, wherein a calculation formula is as follows:
S 2 ＝X*Y；
wherein S is 2 Represents a second coverage area, X represents a first maximum value, and Y represents 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 S is 3 Represents a non-covered area S 1 Representing a first coverage area;
marking the non-coverage area as a non-test area, and marking the first coverage area as a test area.
2. 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 first touch signals are continuous or not according to the first waveform diagram;
if the plurality of first touch signals are not continuous, judging the first touch signals as effective touch signals;
receiving a plurality of second current values of the second touch signals, and generating a second waveform chart according to the second current values;
judging whether the plurality of second touch signals are continuous or not according to the second waveform diagram;
if the plurality of second touch signals are continuous, the second touch signals are determined to be valid touch signals.
3. The method for detecting the quality of a capacitive touch screen according to claim 1, wherein the steps of acquiring a plurality of sensor units covered by the effective touch signal, and acquiring position information of the plurality of sensor units to obtain the reporting point coordinates include:
acquiring signal variation amounts of at least two first electrodes of at least two effective touch signals in the X-axis direction and signal variation amounts of at least two second electrodes in the Y-axis direction in a sensor plane;
acquiring position information of a coverage sensor unit according to the 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 crossing points or not;
and if the first coordinate information and the second coordinate information have the intersection point, taking the position information of the intersection point as the reporting point coordinate.
4. The method for detecting the quality of a capacitive touch screen according to claim 1, wherein the step of calculating a reference deviation value between the point coordinates and the standard coordinates according to the standard coordinates includes:
acquiring a plurality of report coordinates;
obtaining 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 a calculation formula is as follows:
(x 3 ，y 3 )＝(x 2 -x 1 ，y 2 -y 1 )；
wherein, (x) 3 ，y 3 ) Representing one of the deviation values, x 2， y 2 Representing one of the coordinates, x 1， y 1 Representing one of the standard coordinates;
and comparing the values of the deviation values, and taking the maximum value of the deviation values as a reference deviation value.
5. The method for detecting the quality of the capacitive touch screen according to claim 1, wherein after the step of determining that the quality of the capacitive touch screen is acceptable if the reference deviation value does not exceed the preset range, further comprises:
acquiring diameter information of a test pen point;
and saving the diameter information as the sensitivity of the capacitive touch screen.
6. The method of claim 1, wherein the test image comprises at least one of a dotting image, a preset image, and a spiral line image.
7. A quality detection device for a capacitive touch screen, comprising:
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 the effective touch signals and acquiring the position information of the plurality of sensor units to obtain point coordinates;
the third acquisition module is used for acquiring 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;
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 first acquisition module includes:
an acquisition unit for acquiring a first coverage area of the test image in a sensor plane;
the first acquisition unit is used for acquiring contour line information of the test image;
a second acquisition unit configured to acquire a first maximum value of the test image in an X-axis direction and a second maximum value of the test image in a Y-axis direction in a sensor plane according to the contour line information;
the first calculating unit is configured to calculate a second coverage area of the test image according to the first maximum value and the second maximum value, where a calculation formula is:
S2＝X*Y；
wherein S2 represents a second coverage area, X represents a first maximum value, and Y represents a second maximum value;
the second calculating unit is configured to calculate a non-coverage area according to the second coverage area and the first coverage area, where a calculation formula is:
S3＝S2-S1；
wherein S3 represents a non-coverage area and S1 represents 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.
8. A computer device comprising a memory and a processor, said memory storing a computer program, characterized in that,
the processor, when executing the computer program, implements the steps of the method of any one of claims 1 to 6.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211136492.8A CN115454275B (en) | 2022-09-19 | 2022-09-19 | Quality detection method and device for capacitive touch screen and computer equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211136492.8A CN115454275B (en) | 2022-09-19 | 2022-09-19 | Quality detection method and device for capacitive touch screen and computer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115454275A CN115454275A (en) | 2022-12-09 |
| CN115454275B true CN115454275B (en) | 2023-07-28 |
Family
ID=84305623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211136492.8A Active CN115454275B (en) | 2022-09-19 | 2022-09-19 | Quality detection method and device for capacitive touch screen and computer equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115454275B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117102085B (en) * | 2023-10-24 | 2024-01-26 | 江苏省电子信息产品质量监督检验研究院(江苏省信息安全测评中心) | Electronic components integration detects sorting facilities |
| CN117555443B (en) * | 2024-01-12 | 2024-04-02 | 江苏纳帝电子科技有限公司 | Touch screen writing detection analysis method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101386118B1 (en) * | 2012-04-09 | 2014-04-22 | (주) 루켄테크놀러지스 | Method and device for testing touch screen panel |
| US9946418B2 (en) * | 2014-10-08 | 2018-04-17 | Kapik Inc. | System and method for sensing touches in capacitive panels |
| US10678348B2 (en) * | 2018-03-12 | 2020-06-09 | Microsoft Technology Licensing, Llc | Touch detection on an ungrounded pen enabled device |
| CN111078051A (en) * | 2019-12-19 | 2020-04-28 | 京东方科技集团股份有限公司 | Drive circuit and drive method of touch display panel and touch display device |
| CN113297016A (en) * | 2021-04-23 | 2021-08-24 | 惠州市德赛西威汽车电子股份有限公司 | Touch precision detection method and device for touch screen |
| CN114721892B (en) * | 2022-06-08 | 2022-08-30 | 深圳市宇泰光电科技有限公司 | Touch screen equipment test system and test method |
-
2022
- 2022-09-19 CN CN202211136492.8A patent/CN115454275B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115454275A (en) | 2022-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115454275B (en) | Quality detection method and device for capacitive touch screen and computer equipment | |
| CN102576272B (en) | There is the multi-touch touch device of multiple driving frequency and maximal possibility estimation | |
| US10852879B2 (en) | Support of narrow tip styluses on touch screen devices | |
| US9921668B1 (en) | Touch panel controller integrated with host processor for dynamic baseline image update | |
| CN105677130A (en) | Pressure sensing touch control method, pressure sensing touch control device and pressure sensing type touch screen | |
| CN105095887A (en) | Fingerprint recognition module, fingerprint recognition method and display device | |
| CN102929422A (en) | Force sensing capacitive hybrid touch sensor | |
| CN204926126U (en) | Fingerprint identification module and display device | |
| EP2738652A1 (en) | Built-in capacitive touch display screen, and touch point detection method and system therefor | |
| EP3132330B1 (en) | Determining touch locations and forces thereto on a touch and force sensing surface | |
| CN111121607A (en) | Method for training three-dimensional positioning model and three-dimensional positioning method and device | |
| CN102760003B (en) | Method for detecting touch point of touch screen | |
| CN111580004A (en) | Battery detection method, device, equipment and computer readable storage medium | |
| CN104981761A (en) | Touch panel apparatus and methods | |
| CN104063097A (en) | Touch-control device and touch-control detecting method thereof | |
| CN104391616A (en) | Method and device for acquiring pixel point capacitance detecting range of touch screens | |
| CN110658935B (en) | Data detection method and device, storage medium and touch device | |
| CN103713786A (en) | Touch profiling on capacitive-touch screens | |
| US20110050615A1 (en) | Processing circuit for determining touch points of touch event on touch panel and related method | |
| US9298313B2 (en) | In-cell capacitive touch screen and touch contact detecting method and system thereof | |
| US20150084924A1 (en) | Position determination techniques in resistive touch screen applications | |
| CN104850255A (en) | Method for detecting touched position on touch panel, method for inspecting touch panel, and touch panel inspecting apparatus | |
| US10915209B2 (en) | Liquid detecting method and controller for a capacitive touch pad | |
| US10481723B2 (en) | Hover rejection through dynamic thresholding | |
| KR101671835B1 (en) | Apparatus and method for non-touch testing touch screen module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |