A performance detection system for liquid crystal display module

Abstract

The application relates to the technical field of liquid crystal display module detection, in particular to a performance detection system for a liquid crystal display module. The system comprises: a calibration module, which comprises a parameter identification unit for identifying shape parameters of a curved surface touch liquid crystal display module and a position calibration unit for calibrating touch positions of the curved surface touch liquid crystal display module according to the shape parameters; a signal simulation module, which comprises a signal generation unit for generating different types of touch signals and an information collection unit for collecting response information; an information analysis module for analyzing and processing the response information and extracting key information in the response information; a verification module for verifying whether touch feedback matches the touch signals according to the key information and determining detection information according to a matching result; and a recording module for recording a detection result according to the detection information. The calibration module is used for calibrating a touch area according to the shape parameters, so as to reduce the negative influence of the surface shape of the curved surface touch liquid crystal display module on touch detection accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal display module detection, in particular to a performance detection system for liquid crystal display module. BACKGROUND

[0002] The liquid crystal display module (LCD module) is a whole display device composed of a liquid crystal screen, a driving circuit, a shell and other components. The curved touch liquid crystal display module refers to a touchable display module with a certain degree of arc or curved surface design on the surface of the liquid crystal screen in the liquid crystal display module, which is widely used in mobile intelligent devices and has broad development prospects.

[0003] However, the existing performance detection system for liquid crystal display module is difficult to obtain accurate test results when testing the touch of the curved touch liquid crystal display module, due to the influence of the surface shape of the curved touch liquid crystal display module. SUMMARY

[0004] The present application provides a performance detection system for liquid crystal display module to solve the problem that the existing performance detection system for liquid crystal display module is difficult to obtain accurate test results when testing the touch of the curved touch liquid crystal display module, due to the influence of the surface shape of the curved touch liquid crystal display module.

[0005] To achieve the above-mentioned purpose, the present application provides a performance detection system for liquid crystal display module, which is applied to a touch test instrument for liquid crystal display module. The system comprises:

[0006] A calibration module, comprising a parameter identification unit for identifying the shape parameters of the curved touch liquid crystal display module and a position calibration unit for calibrating the touch position of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module determined by the parameter identification unit;

[0007] A signal simulation module connected with the calibration module, comprising a signal generation unit for generating different types of touch signals after the position calibration unit calibrates the curved touch liquid crystal display module and an information acquisition unit for acquiring the response information of different types of touch signals;

[0008] An information analysis module connected with the signal simulation module, for extracting key information in the response information by analyzing and processing the response information acquired by the information acquisition unit;

[0009] A verification module connected with the information analysis module, for verifying whether the touch feedback matches the touch signal according to the key information extracted by the information analysis module, and determining the detection information according to the matching result;

[0010] A recording module is connected with the verification module, and is configured to record the detection result according to the detection information determined by the verification module.

[0011] The application calibrates the touch area of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module through the calibration module, so as to reduce the negative influence of the surface shape of the curved touch liquid crystal display module on the touch detection accuracy. At the same time, the signal simulation module generates different touch signals, collects the corresponding information of the touch signals, and then analyzes and judges the response information through the information analysis module and the verification module to obtain the detection information. The recording module records the detection information in the detection result. Further, the liquid crystal display module touch tester further comprises at least one laser scanner.

[0012] The parameter identification unit is configured to control the laser scanner to scan the surface of the curved touch liquid crystal display module and receive the information of the scanning points. According to the information of the scanning points, the three-dimensional model of the curved touch liquid crystal display module is established.

[0013] The parameter identification unit is further configured to obtain the curvature of the scanning points according to the three-dimensional model.

[0014] The curvature of the scanning points is calculated according to the three-dimensional model through the following formula:

[0015] ;

[0016] Wherein, is the curvature of the scanning point, is the coordinate value of the scanning point in the three-dimensional model,

[0017] is a preset discretization step.

[0018] By using the three-dimensional model of the curved touch liquid crystal display module to quickly calculate the curvature of each scanning point on the surface of the curved touch liquid crystal display module, the subsequent touch calibration according to the curvature distribution of the surface of the curved touch liquid crystal display module is facilitated, so that the touch detection for the curved touch liquid crystal display module is more accurate.

[0019] Further, the parameter identification unit is configured to determine the curvature distribution information of the surface of the curved touch liquid crystal display module according to the curvature of the scanning points, and transmit the curvature distribution information to the position calibration unit.

[0020] According to the curvature of each scanning point on the curved touch liquid crystal display module, curvature distribution information of the curved touch liquid crystal display module surface can be determined, so that the overall calibration of the curved touch liquid crystal display module before detection can be carried out according to the curvature distribution information, the overall shape of the curved touch liquid crystal display module surface is taken into account for touch detection, and the accuracy of touch detection is further improved.

[0021] Further, the position calibration unit is configured to formulate an overall calibration scheme according to the curvature distribution information, and to perform touch position calibration on the curved touch liquid crystal display module according to the overall calibration scheme.

[0022] According to the above technical scheme, the overall calibration scheme is determined according to the curvature distribution information of the curved touch liquid crystal display module surface, further reducing the negative impact of the curved touch liquid crystal display module surface shape on touch detection, and improving the accuracy of touch detection.

[0023] Further, the type of touch signal includes but is not limited to single-point touch, multi-point touch, sliding operation and quick click;

[0024] The signal generation unit includes at least one touch signal generator;

[0025] The signal generation unit is configured to control the touch signal generator to generate different types of touch signals, and to transmit the touch signals to the curved touch liquid crystal display module, and to determine the response information according to the feedback of the curved touch liquid crystal display module;

[0026] The information acquisition unit is configured to collect the response information.

[0027] According to the above technical scheme, different types of touch signals are transmitted to the curved touch liquid crystal display module by the signal generation unit, and after the curved touch liquid crystal display module responds, the information acquisition unit is configured to collect the response information, so that subsequent adjustments can be made according to the response information to improve the accuracy of touch detection.

[0028] Further, after the information acquisition unit collects the response information, the information acquisition unit is configured to filter the response information, determine key information in the response information, and send the key information to the verification module;

[0029] The key information includes but is not limited to touch coordinates, touch area and touch pressure;

[0030] The verification module is configured to analyze the key information and the touch signal after receiving the key information, compare the key information with the touch signal, and transmit a success signal and the touch signal to the recording module if the key information is consistent with the touch signal.

[0031] If the key information and the touch signal are inconsistent, an abnormal signal and the touch signal are transmitted to the position calibration unit.

[0032] The above technical solution is adopted, the information acquisition unit is configured to filter the response information, and the response information caused by the false touch operation is excluded, and the key information in the effective response information is compared with the information in the touch signal to determine whether the touch detection result is abnormal, if the abnormal signal and the touch signal are sent to the position calibration unit if the abnormal signal and the touch signal are sent to the position calibration unit, if not, the recording module is used to record the detection result, and the false touch operation in the response information is avoided to cause negative influence on the touch detection, and the accuracy of the touch detection is further improved, and the abnormal signal and the touch are sent to the position calibration unit, so that the position calibration unit makes corresponding adjustment, and provides important data basis for determining the cause of the abnormal signal.

[0033] Further, the position calibration unit is configured to analyze the touch signal after obtaining the abnormal signal and the touch signal, determine the touch area corresponding to the touch signal, and perform local calibration on the touch area, and transmit a retry signal and the touch signal to the signal simulation module.

[0034] The signal simulation module is configured to retransmit the touch signal to the curved touch liquid crystal display module after receiving the retry signal and the touch signal, and determine the response information according to the feedback of the curved touch liquid crystal display module.

[0035] If the number of repeated transmissions of the retry signal exceeds the preset retry number, the error information and the touch signal are transmitted to the recording module.

[0036] The recording module is configured to record the error information and the touch signal in the detection result.

[0037] The above technical solution is adopted, the position calibration unit is configured to perform local calibration on the touch area corresponding to the touch signal according to the surface shape of the curved touch liquid crystal display module, and the accuracy of the touch detection is further improved on the basis of the overall calibration in the foregoing embodiment, and the cause of the abnormal signal is accurately determined.

[0038] Further, after the signal simulation module transmits the touch signal to the edge of the curved touch liquid crystal display module, if the position calibration unit receives the abnormal signal and the touch signal at the current time, the position calibration unit is configured to analyze the touch signal to determine the touch area corresponding to the touch signal.

[0039] The touch area is dynamically subjected to edge expansion processing, and the touch area is adjusted.

[0040] According to the touch area, the touch area is calibrated.

[0041] According to the touch area, the touch area is calibrated.

[0042] Further, after the signal simulation module transmits the touch signal to the curved touch liquid crystal display module, when the type of the touch signal is multi-point touch, and the key information is different from the touch signal, the touch signal is analyzed and divided into at least one touch signal of the type of single-point touch.

[0043] According to at least one touch signal of the type of single-point touch, at least one touch signal is transmitted to the curved touch liquid crystal display module, and the response information is determined according to the feedback of the curved touch liquid crystal display module, and the information acquisition unit is configured to extract the key information.

[0044] If the key information corresponding to at least one touch signal is different from the touch signal, the signal simulation module is configured to transmit at least one abnormal signal and at least one touch signal corresponding to the touch signal to the position calibration unit, and the position calibration unit is configured to calibrate the touch area corresponding to the touch signal.

[0045] The above technical solution is adopted. When there is an abnormality in the multi-point touch detection process, in order to reduce the calculation amount of the position calibration unit, the multi-point touch is first analyzed as a plurality of single-point touches, at least one touch signal generating an abnormal signal in the multi-point touch is determined, and the position calibration unit is used to locally calibrate the touch area corresponding to the at least one touch signal generating an abnormal signal in the multi-point touch by the local calibration method of the foregoing embodiments, which significantly improves the efficiency and accuracy of the multi-point detection process.

[0046] Further, after the position calibration unit receives at least one of the abnormal signals and the touch signals, if there is a case that the touch area corresponding to at least one of the touch signals is located at the edge of the curved touch liquid crystal display module, the position calibration unit is configured to first perform the edge expansion processing and calibration on the touch area, and then perform calibration on the touch areas corresponding to other touch signals.

[0047] By using the above technical solution, in the multi-point touch detection process, when at least one touch signal corresponds to a touch area located at the edge of the curved touch liquid crystal display module and an abnormal signal is generated, not only the edge area of the curved touch liquid crystal display module is dynamically expanded, but also the expanded touch area is locally calibrated to ensure the accuracy of touch detection when multi-point touch and edge touch intersect.

[0048] The above technical solution has the following advantages:

[0049] By using the calibration module to calibrate the touch area of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module, the signal simulation module generates different touch signals at the same time, collects the corresponding information of the touch signals, and then analyzes and judges the response information through the information analysis module and the verification module to obtain detection information, and records the detection information into the detection result through the recording module, so as to reduce the negative impact of the surface shape of the curved touch liquid crystal display module on the accuracy of touch detection, and solve the problem of low reference of touch detection results caused by the influence of the surface shape of the curved touch liquid crystal display module in the prior art.

[0050] The curvature of each scanning point on the surface of the curved touch liquid crystal display module is quickly calculated through the three-dimensional model of the curved touch liquid crystal display module, so that subsequent touch calibration can be performed according to the curvature distribution of the surface of the curved touch liquid crystal display module, and the touch detection of the curved touch liquid crystal display module is more accurate.

[0051] The curvature distribution information of the surface of the curved touch liquid crystal display module can be determined according to the curvature of each scanning point on the curved touch liquid crystal display module, so that subsequent overall calibration of the curved touch liquid crystal display module before detection can be performed according to the curvature distribution information, the overall shape of the surface of the curved touch liquid crystal display module is taken into account for touch detection, and the accuracy of touch detection is further improved.

[0052] The overall calibration scheme is determined according to the curvature distribution information of the surface of the curved touch liquid crystal display module, which further reduces the negative impact of the surface shape of the curved touch liquid crystal display module on touch detection and improves the accuracy of touch detection.

[0053] The different types of touch signals are transmitted to the curved touch liquid crystal display module by using the signal generating unit, and the information collecting unit is used to collect the response information after the curved touch liquid crystal display module responds, so as to make corresponding adjustment according to the response information subsequently, so as to improve the accuracy of touch detection.

[0054] The response information generated by the false touch operation is excluded by filtering the response information by the information collecting unit, and the key information in the effective response information is compared with the information in the touch signal to judge whether the touch detection result is abnormal. If it exists, the abnormal signal and the touch signal are sent to the position calibration unit, and if it does not exist, the detection result is recorded by the recording module, so as to avoid the negative influence of the false touch operation in the response information on the touch detection, further improve the accuracy of the touch detection, and send the abnormal signal and the touch to the position calibration unit, so as to make corresponding adjustment by the position calibration unit, and provide important data basis for determining the cause of the abnormal signal subsequently.

[0055] The touch signal corresponding touch area is calibrated locally by the position calibration unit according to the surface shape of the curved touch liquid crystal display module, and the touch area generating abnormal signal is calibrated locally twice on the basis of the overall calibration in the foregoing embodiment, so as to further improve the accuracy of touch detection, and accurately judge the cause of abnormal signal.

[0056] When the abnormal signal is generated at the edge of the curved touch liquid crystal display module, the position calibration unit is used for edge expansion processing of the edge area of the curved touch liquid crystal display module generating abnormal signal, so as to avoid the generation of abnormal signal when detecting the edge area of the curved touch liquid crystal display module due to the small size of the edge touch area, and further improve the accuracy and comprehensiveness of touch detection.

[0057] When there is an abnormality in the multi-point touch detection process, in order to reduce the calculation amount of the position calibration unit, the multi-point touch is analyzed as a plurality of single-point touches first, at least one touch signal generating abnormal signal in the multi-point touch is determined, and then the position calibration unit is used to calibrate the touch area corresponding to the at least one touch signal generating abnormal signal in the multi-point touch by the local calibration mode of the foregoing embodiment, which significantly improves the efficiency and accuracy of the multi-point detection process.

[0058] In the multi-point touch detection process, when at least one touch signal corresponding touch area is located at the edge of the curved touch liquid crystal display module and generates abnormal signal, not only the edge area of the curved touch liquid crystal display module is dynamically expanded, but also the touch area after expansion is calibrated locally, so as to ensure the accuracy of touch detection when multi-point touch and edge touch appear intersection. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0060] Figure 1 An application scenario schematic diagram provided for an embodiment of the present application;

[0061] Figure 2 A structure schematic diagram of a liquid crystal display module performance detection system provided for an embodiment of the present application. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0063] In addition, the term "and / or" in this paper is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper, unless otherwise specified, generally represents an "or" relationship between the associated objects before and after it.

[0064] The embodiments of the present application will be further described in detail below in combination with the drawings of the specification.

[0065] The curved touch liquid crystal display module refers to a touchable display module in which the surface of the liquid crystal screen in the liquid crystal display module presents a certain degree of arc or curved surface design, which is widely used in mobile intelligent devices and has broad development prospects.

[0066] However, the existing liquid crystal display module performance detection system is difficult to obtain accurate test results when performing touch test on the curved touch liquid crystal display module, which is affected by the surface shape of the curved touch liquid crystal display module.

[0067] Based on this, the application provides a performance detection system for a liquid crystal display module. The calibration module calibrates the touch area of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module. The signal simulation module generates different touch signals at the same time, collects the corresponding information of the touch signals, and analyzes and judges the response information through the information analysis module and the verification module to obtain detection information. The detection information is recorded in the detection result through the recording module, so as to reduce the negative influence of the surface shape of the curved touch liquid crystal display module on the touch detection accuracy, and solve the problem of low reference of the touch detection result caused by the influence of the surface shape of the curved touch liquid crystal display module.

[0068] Figure 1 An application scenario provided by the application is shown in the following embodiment. In the process of touch detection of the curved touch liquid crystal display module by the touch detector for the liquid crystal display module, the system of the application calibrates the touch of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module. After the touch detection of the curved liquid crystal display module by the touch detector for the liquid crystal display module, the corresponding response information is obtained, so as to reduce the negative influence of the surface shape of the curved touch liquid crystal display module on the touch detection accuracy. The specific implementation mode can be referred to the following embodiment.

[0069] Figure 2 A structural schematic diagram of a performance detection system for a liquid crystal display module provided by an embodiment of the application is shown in the following embodiment. Figure 2 As shown in the following embodiment, the performance detection system for the liquid crystal display module 200 of the embodiment includes:

[0070] The calibration module 201 includes a parameter identification unit 20101 for identifying the shape parameters of the curved touch liquid crystal display module and a position calibration unit 20102 for calibrating the touch position of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module determined by the parameter identification unit 20101;

[0071] The signal simulation module 202 is connected with the calibration module 201, and includes a signal generation unit 20201 for generating different types of touch signals after the position calibration unit 20102 calibrates the curved touch liquid crystal display module and an information collection unit 20202 for collecting the response information of different types of touch signals;

[0072] The information analysis module 203 is connected with the signal simulation module 202, and is used for analyzing and processing the response information collected by the information collection unit 20202 to extract the key information in the response information;

[0073] a verification module 204, connected with the information analysis module 203, configured to verify whether the touch feedback matches the touch signal according to the key information extracted by the information analysis module 203, and determine detection information according to a matching result;

[0074] a recording module 205, connected with the verification module 204, configured to record a detection result according to the detection information determined by the verification module 204.

[0075] The application calibrates the touch area of the curved touch liquid crystal display module according to the shape parameters of the curved touch liquid crystal display module, so as to reduce the negative influence of the surface shape of the curved touch liquid crystal display module on the touch detection accuracy. The signal simulation module 202 generates different touch signals at the same time, collects the corresponding information corresponding to the touch signals, and then the information analysis module 203 and the verification module 204 analyze and judge the response information to obtain detection information, and the recording module 205 records the detection information into the detection result.

[0076] Specifically, the liquid crystal display module touch tester further comprises at least one laser scanner; the parameter identification unit 20101 is configured to control the laser scanner to scan the surface of the curved touch liquid crystal display module, and receive information of the scanning points, and establish a three-dimensional model of the curved touch liquid crystal display module according to the information of the scanning points;

[0077] The parameter identification unit 20101 is further configured to obtain the curvature of the scanning points according to the three-dimensional model;

[0078] The curvature of the scanning points is obtained according to the three-dimensional model by formula (1):

[0079] (1)

[0080] wherein, is the curvature of the scanning point, is the coordinate value of the scanning point in the three-dimensional model, is a preset discretization step.

[0081] In the embodiment of the application, the preset discretization step can be adjusted according to the detection requirement. The smaller the preset discretization step, the more accurate the obtained curvature of the scanning point. The preset discretization step can also be obtained by statistical analysis of historical detection data.

[0082] By the scheme provided in the embodiment, the curvature of each scanning point on the surface of the curved touch liquid crystal display module is quickly calculated by using the three-dimensional model of the curved touch liquid crystal display module, so that the touch calibration is performed according to the curvature distribution of the surface of the curved touch liquid crystal display module, and the touch detection for the curved touch liquid crystal display module is more accurate.

[0083] Specifically, the parameter identification unit 20101 is configured to determine the curvature distribution information of the surface of the curved touch liquid crystal display module according to the curvature of the scanning point, and transmit the curvature distribution information to the position calibration unit 20102.

[0084] First, the position of each scanning point on the surface of the curved touch liquid crystal display module is described by using formula (2):

[0085] (2)

[0086] wherein, is the position of each scanning point on the surface of the curved touch liquid crystal display module, is the transverse coordinate of the surface of the curved touch liquid crystal display module, is the longitudinal coordinate of the surface of the curved touch liquid crystal display module, is the three-dimensional coordinate of the scanning point.

[0087] Then, the curvature tensor of the surface of the curved touch liquid crystal display module at the scanning point is described by formula (3) in the case of knowing the curvature of the scanning point:

[0088] (3)

[0089] wherein, is the curvature tensor of the surface of the curved touch liquid crystal display module at the scanning point, is the curvature of the scanning point, is the transverse coordinate of the surface of the curved touch liquid crystal display module, is the longitudinal coordinate of the surface of the curved touch liquid crystal display module.

[0090] Further, the eigenvalues of the curvature tensor are calculated, and the eigenvalues satisfy formula (4):

[0091] (4)

[0092] wherein, is the curvature tensor of the surface of the curved touch liquid crystal display module at the scanning point, is the unit matrix, and the eigenvalues and are obtained by solving the equation.

[0093] Finally, the values of the principal curvatures and at the scanning point are and respectively.

[0094] By calculating the principal curvatures of each scanning point, the curvature distribution information of the surface of the curved touch liquid crystal display module can be obtained after summarizing.

[0095] In the embodiments of the present application, the curvature distribution information can be data information used to express the distribution of curvature values at each scanning point on the curved touch liquid crystal display module. The overall shape characteristics of the curved touch liquid crystal display module can be known through the curvature distribution information.

[0096] Through the scheme provided in the embodiments, the principal curvature of each scanning point can be calculated according to the curvature of each scanning point on the curved touch liquid crystal display module, and the curvature distribution information of the surface of the curved touch liquid crystal display module can be determined after the principal curvature of each scanning point is summarized, so as to further improve the accuracy of touch detection by taking the overall shape of the surface of the curved touch liquid crystal display module into account for the touch detection before the subsequent detection of the curved touch liquid crystal display module.

[0097] Specifically, the position calibration unit 20102 is configured to formulate an overall calibration scheme according to the curvature distribution information, and to perform touch position calibration on the curved touch liquid crystal display module according to the overall calibration scheme.

[0098] The curvature distribution information is analyzed, and the average curvature of each scanning point is calculated through formula (5):

[0099] (5)

[0100] wherein, is the average curvature of the scanning point, and is the principal curvature of the scanning point.

[0101] According to the average curvature of the scanning point, formula (6) is designed as a touch adjustment mapping formula:

[0102] (6)

[0103] wherein, is the adjusted touch position, is the original touch position, i.e., the scanning point position, is an adjustment coefficient.

[0104] The adjustment coefficient under different average curvatures is calculated through formula (7): :

[0105] (7)

[0106] wherein, is the adjustment coefficient, is the average curvature of the scanning point, is the minimum value of the adjustment coefficient, is the maximum value of the adjustment coefficient, is a minimum value of the average curvature, is a maximum value of the average curvature.

[0107] Finally, the adjusted touch position of each scanning point is determined according to the calculation , and the overall calibration scheme is determined, and the scanning point touch position is calibrated.

[0108] In the embodiment of the application, the overall calibration scheme can include the adjusted corresponding touch position information of all scanning points on the surface of the curved liquid crystal display module.

[0109] According to the scheme provided in the embodiment, the average curvature of the scanning point is calculated according to the principal curvature of the scanning point, and then the corresponding adjustment coefficient of the touch adjustment mapping formula under different average curvatures is calculated, and the adjusted touch position is calculated according to the adjustment coefficient, so that the overall calibration scheme is determined according to the curvature distribution information of the surface of the curved touch liquid crystal display module, further reducing the negative impact of the shape of the surface of the curved touch liquid crystal display module on touch detection, and improving the accuracy of touch detection.

[0110] Specifically, the types of touch signals include but are not limited to single-point touch, multi-point touch, sliding operation and quick click; the signal generation unit 20201 includes at least one touch signal generator; the signal generation unit 20201 is used to control the touch signal generator to generate different types of touch signals, and transmit the touch signals to the curved touch liquid crystal display module, and determine the response information according to the feedback of the curved touch liquid crystal display module; the information acquisition unit 20202 is used to collect the response information.

[0111] In the embodiment of the application, the touch signal generator can be other sensors capable of generating touch signals, such as capacitive touch sensors and pressure sensors; the information in the touch signal includes but is not limited to at least one touch coordinate, touch area and touch pressure; the response information includes but is not limited to at least one touch coordinate, touch area and touch pressure.

[0112] Through the scheme provided in the embodiment, the signal generation unit 20201 is used to transmit different types of touch signals to the curved touch liquid crystal display module, and after the curved touch liquid crystal display module responds, the information acquisition unit 20202 is used to collect the response information, so as to make corresponding adjustment according to the response information in the future, so as to improve the accuracy of touch detection.

[0113] Specifically, after the information collection unit 20202 collects the response information, the information collection unit 20202 is configured to filter the response information, determine the key information in the response information, and send the key information to the verification module 204; the key information includes but is not limited to at least one touch coordinate, a touch area, and a touch pressure; the verification module 204 is configured to analyze the key information and the touch signal after receiving the key information, compare the key information with the touch signal, if the key information is consistent with the touch signal, transmit a success signal and the touch signal to the record module 205, and the record module 205 records the detection result according to the success signal and the touch signal; if the key information is different from the touch signal, transmit an abnormal signal and the touch signal to the position calibration unit 20102.

[0114] In the process of filtering the response information by the information collection unit 20202, first, the information collection unit 20202 determines whether at least one touch coordinate in the response information is within a preset touch range according to the preset touch range, if not, the touch coordinate in the response information is regarded as a false touch, and is filtered out;

[0115] Secondly, the information collection unit 20202 determines whether at least one touch area in the response information is less than a preset touch area according to the preset touch area, if yes, the touch coordinate corresponding to the touch area is regarded as a false touch, and is filtered out;

[0116] Further, the information collection unit 20202 determines whether at least one touch pressure in the response information is less than a preset touch pressure according to the preset touch pressure, if yes, the touch coordinate corresponding to the touch pressure is regarded as a false touch, and is filtered out;

[0117] After the information collection unit 20202 completes the filtering of the response information, at least one valid touch coordinate and the touch area and the touch pressure corresponding thereto are included in the key information.

[0118] The verification module 204 is configured to compare the touch coordinate, the touch pressure, and the touch area in the key information with the touch coordinate, the touch pressure, and the touch area in the touch signal, respectively.

[0119] In the embodiment of the application, the success signal can be a signal data for indicating that the touch detection is normal; and the abnormal signal can be a signal data for indicating that the touch detection is abnormal.

[0120] By the scheme provided in this embodiment, the information collection unit 20202 is configured to filter the response information, exclude the response information caused by the false touch operation, and compare the key information in the valid response information with the information in the touch signal to determine whether the touch detection result is abnormal. If the touch detection result is abnormal, the abnormal signal and the touch signal are sent to the position calibration unit 20102. If the touch detection result is not abnormal, the detection result is recorded by the recording module 205, so that the false touch operation in the response information does not have a negative impact on the touch detection, and the accuracy of the touch detection is further improved. Meanwhile, the abnormal signal and the touch signal are sent to the position calibration unit 20102, so that the position calibration unit 20102 can make corresponding adjustment, and important data basis for determining the cause of the abnormal signal is provided.

[0121] Specifically, after obtaining the abnormal signal and the touch signal, the position calibration unit 20102 is configured to analyze the touch signal, determine the touch area corresponding to the touch signal, locally calibrate the touch area, and transmit the retry signal and the touch signal to the signal simulation module 202. After receiving the retry signal and the touch signal, the signal simulation module 202 is configured to retransmit the touch signal to the curved touch liquid crystal display module, re-determine the response information according to the feedback of the curved touch liquid crystal display module, and transmit the error information and the touch signal to the recording module 205 if the number of times of retransmitting the retry signal exceeds the preset retry number. The recording module 205 is configured to record the error information and the touch signal in the detection result.

[0122] When the verification module 204 sends the abnormal signal and the touch signal, it does not necessarily mean that the curved liquid crystal display module has a fault. It is also possible that the curved liquid crystal display module is affected by the continuous concave-convex change invisible to the naked eye on the surface of the curved liquid crystal display module, so that the foregoing overall calibration process is not accurate enough. Therefore, at this time, the area corresponding to the touch signal needs to be locally calibrated to determine the cause of the abnormal signal.

[0123] According to the above formula (8), the principal curvatures of the scanning point are and The overall bending characteristics of the surface of the curved touch liquid crystal display module near the scanning point are described by the following formula:

[0124] (8)

[0125] wherein, is a value for expressing the overall bending characteristics of the surface of the curved touch liquid crystal display module near the scanning point, and are the principal curvatures of the scanning point;

[0126] When When the value is positive, the surface of the curved touch LCD module is convex near the scanning point. When a certain area of ​​the curved touch LCD module surface is convex, the touch sensitivity of that area will increase, leading to a higher probability of accidental touches. At this time, the position calibration unit 20102 reduces the touch sensitivity of that area, making that area require greater touch pressure to trigger, thereby reducing accidental touches.

[0127] when When the value is negative, the surface of the curved touch LCD module is concave near the scanning point. When a certain area of ​​the curved touch LCD module surface is concave, the touch response sensitivity of that area will decrease, resulting in a decrease in trigger accuracy. At this time, the position calibration unit 20102 improves the touch sensitivity of that area to improve the touch accuracy of that area.

[0128] when The larger the absolute value of , the greater the curvature of the curved touch LCD module surface near the scanning point. If there is an abnormality in touch detection in the area near the scanning point, it may be because the contact area between the signal generation unit 20201 and the area with a large curvature is too small. In this case, the position calibration unit 20102 needs to send the curvature value of the area to the signal generation unit 20201 so that the signal generation unit 20201 can adjust the angle according to the curvature value of the area to improve the touch detection accuracy.

[0129] when When the value is close to 0, it indicates that the surface of the curved touch LCD module is relatively flat near the scanning point. In this case, it is necessary to calculate the overall bending characteristic value near multiple scanning points using formula (8) and recalculate the adjustment coefficient using formula (9).

[0130] (9)

[0131] in, To adjust the coefficient, This value is used to express the overall bending characteristics of the surface of a curved touch LCD display module near the scanning point. The minimum value among the overall bending characteristics near multiple scanning points. The maximum value among the overall bending characteristic values ​​near multiple scanning points. This is the minimum value of the adjustment coefficient. This represents the maximum value of the adjustment coefficient.

[0132] The recalculated adjustment factor Substitute into formula (6) to obtain the adjusted touch position, so that the position calibration unit 20102 can perform local calibration of the corresponding area touch position in the touch signal that generates abnormal signal according to the adjusted touch position.

[0133] If the touch signal is input into the curved touch liquid crystal display module after the above local calibration manner, correct response information can be obtained, which indicates that the curved touch liquid crystal display module itself is not faulty. If the above local calibration manner is passed, and the number of repeated transmissions of the retry signal exceeds the preset retry number, it indicates that the curved touch liquid crystal display module itself has a fault at this time.

[0134] In the embodiment of the application, the preset number of repetitions can be set according to the actual detection situation, and the application does not make specific limitations; the retry signal can be a signal data for causing the signal simulation module 202 to re-input the touch signal into the curved touch liquid crystal display module.

[0135] Through the scheme provided in the embodiment, the value capable of expressing the overall bending characteristics of the surface of the curved touch liquid crystal display module near the scanning point is calculated according to the principal curvature of the scanning point. The position calibration unit 20102 is used to perform targeted local calibration on the touch signal corresponding touch area according to the different bending characteristics of the surface of the curved touch liquid crystal display module. On the basis of the overall calibration in the foregoing embodiment, the touch area that produces an abnormal signal is subjected to secondary local calibration, so as to further improve the accuracy of touch detection, and accurately determine the cause of the abnormal signal.

[0136] Specifically, after the signal simulation module 202 transmits the touch signal to the edge of the curved touch liquid crystal display module, if the position calibration unit 20102 receives an abnormal signal and a touch signal at the current time, the signal simulation module 202 is used to analyze the touch signal to determine the touch area corresponding to the touch signal; the position calibration unit 20102 is used to perform dynamic edge expansion processing on the touch area, and adjust the touch area; and the touch area is calibrated according to the touch area.

[0137] When the signal simulation module 202 performs touch detection on the edge of the curved touch liquid crystal display module and an abnormal signal is generated, it is possible that the degree of curvature of the edge of the curved touch liquid crystal display module is too large, so that the contact area between the signal generation unit 20201 and the edge of the curved touch liquid crystal display module is still too small after the angle is adjusted. At this time, the touch area corresponding to the touch signal is subjected to edge expansion processing by the position calibration unit 20102.

[0138] After it is known through the above embodiment that the curvature of the touch signal at the touch coordinate is The range of dynamic edge expansion is calculated by formula (10):

[0139] (10)

[0140] wherein, is the range of dynamic edge expansion, a curvature at the touch coordinates in the touch signal, an expansion zone coefficient;

[0141] The expansion zone coefficient can be calculated by formula (11):

[0142] (11)

[0143] wherein, an expansion zone coefficient, a number of pixels in the edge touch area, a length of the edge touch area.

[0144] By the scheme provided in this embodiment, when an abnormal signal is generated at the edge of the curved touch liquid crystal display module, the position calibration unit 20102 is used for edge expansion zone processing on the edge area of the curved touch liquid crystal display module where the abnormal signal is generated, so as to avoid the generation of an abnormal signal when the edge area of the curved touch liquid crystal display module is detected due to the small size of the edge touch area, and further improve the accuracy and comprehensiveness of touch detection.

[0145] Specifically, after the signal simulation module 202 transmits the touch signal to the curved touch liquid crystal display module, when the type of the touch signal is multi-point touch and the key information is different from the touch signal, the touch signal is analyzed and divided into at least one touch signal of the type of single-point touch;

[0146] According to the at least one touch signal of the type of single-point touch, the at least one touch signal is respectively transmitted to the curved touch liquid crystal display module, and the response information is respectively determined according to the feedback of the curved touch liquid crystal display module, and the information acquisition unit 20202 is used for respectively extracting the key information;

[0147] If the key information corresponding to the at least one touch signal is different from the touch signal, the signal simulation module 202 is used for respectively transmitting the at least one abnormal signal and the at least one corresponding touch signal to the position calibration unit 20102, and the position calibration unit 20102 is used for respectively calibrating the touch area corresponding to the touch signal.

[0148] By the scheme provided in this embodiment, when there is an abnormality in the multi-point touch detection process, in order to reduce the calculation amount of the position calibration unit 20102, the multi-point touch is first analyzed as a plurality of single-point touches, at least one touch signal generating an abnormal signal in the multi-point touch is determined, and then the position calibration unit 20102 is used to locally calibrate the touch area corresponding to the at least one touch signal generating an abnormal signal in the multi-point touch by the local calibration method of the foregoing embodiment, which significantly improves the efficiency and accuracy of the multi-point detection process.

[0149] Specifically, after the position calibration unit 20102 receives at least one abnormal signal and touch signal, if there is a case that the touch area corresponding to at least one touch signal is located at the edge of the curved touch liquid crystal display module, the position calibration unit 20102 is configured to first perform edge expansion processing and calibration on the touch area alone, and then perform calibration on the touch area corresponding to other touch signals.

[0150] In the detection process of multi-point touch, when the touch area corresponding to at least one touch signal is located at the edge of the curved touch liquid crystal display module and an abnormal signal is generated, it is not possible to only perform edge expansion processing or local calibration on the area corresponding to the touch signal, because it is not possible to determine whether the abnormal signal is generated due to the small contact area between the signal generation unit 20201 and the area, or due to the inaccuracy of the area in the overall calibration in the foregoing embodiments. Therefore, it is necessary to first perform edge expansion processing on the area using the edge expansion processing method in the foregoing embodiments, and then perform local calibration on the touch area after the edge expansion using the local calibration method in the foregoing embodiments.

[0151] The foregoing embodiments fully consider that, when the touch area corresponding to at least one touch signal is located at the edge of the curved touch liquid crystal display module and an abnormal signal is generated in the multi-point touch detection, not only the edge area of the curved touch liquid crystal display module is dynamically expanded, but also the touch area after the expansion is locally calibrated,

[0152] to ensure the accuracy of touch detection when multi-point touch and edge touch intersect.

Claims

1. A performance testing system for a liquid crystal display module, characterized in that, A touch tester for a liquid crystal display module is applied, the system comprising: The calibration module includes a parameter identification unit for identifying the shape parameters of the curved touch LCD module and a position calibration unit for calibrating the touch position of the curved touch LCD module based on the shape parameters of the curved touch LCD module determined by the parameter identification unit. The position calibration unit is used to formulate an overall calibration plan based on the curvature distribution information, and to perform touch position calibration on the curved touch LCD module according to the overall calibration plan. The signal simulation module, which is connected to the calibration module, includes a signal generation unit for generating different types of touch signals after the curved touch liquid crystal display module is calibrated by the position calibration unit, and an information acquisition unit for acquiring response information of different types of touch signals. An information analysis module, connected to the signal simulation module, is used to analyze and process the response information collected by the information acquisition unit and extract key information from the response information. A verification module, connected to the information analysis module, is used to verify whether the touch feedback matches the touch signal based on the key information extracted by the information analysis module, and to determine the detection information based on the matching result. A recording module, which is connected to the verification module, is used to record the detection results based on the detection information determined by the verification module; After collecting the response information, the information acquisition unit filters the response information, determines the key information in the response information, and sends the key information to the verification module. The key information includes, but is not limited to, at least one touch coordinate, touch area, and touch pressure; After receiving the key information, the verification module analyzes the key information and the touch signal, compares the key information and the touch signal, and if the key information and the touch signal are consistent, transmits the success signal and the touch signal to the recording module. The recording module records the detection result based on the success signal and the touch signal. If the key information differs from the touch signal, the abnormal signal and the touch signal are transmitted to the position calibration unit. After acquiring the abnormal signal and the touch signal, the position calibration unit analyzes the touch signal, determines the touch area corresponding to the touch signal, performs local calibration on the touch area, and transmits the retry signal and the touch signal to the signal simulation module. After receiving the retry signal and the touch signal, the signal simulation module is used to retransmit the touch signal to the curved touch LCD display module and re-determine the response information based on the feedback from the curved touch LCD display module. If the number of retry signal transmissions exceeds the preset number of retry attempts, the error message and the touch signal are transmitted to the recording module. The recording module is used to record the error information and the touch signal into the detection results.

2. The performance testing system for liquid crystal display modules according to claim 1, characterized in that, The touch tester for the liquid crystal display module also includes at least one laser scanner; The parameter recognition unit is used to control the laser scanner to scan the surface of the curved touch LCD module, receive the information of the scan points, and establish a three-dimensional model of the curved touch LCD module based on the information of the scan points. The parameter recognition unit is also used to obtain the curvature of the scanning point based on the three-dimensional model; The curvature of the scanned point, obtained from the three-dimensional model, is calculated using the following formula: ； in, The curvature of the scanned point. The coordinates of the scanned point in the 3D model. To preset the discretization step size, The coordinates of the previous scan point adjacent to the current scan point in the 3D model. The coordinates of the previous scan point adjacent to the current scan point in the 3D model.

3. The performance testing system for liquid crystal display modules according to claim 2, characterized in that, The parameter recognition unit is used to determine the curvature distribution information of the surface of the curved touch liquid crystal display module based on the curvature of the scanning point, and transmit the curvature distribution information to the position calibration unit.

4. The performance testing system for liquid crystal display modules according to claim 1, characterized in that, The types of touch signals include, but are not limited to, single-point touch, multi-point touch, swipe operation, and rapid click; The signal generation unit includes at least one touch signal generator; The signal generation unit is used to control the touch signal generator to generate different types of touch signals and transmit the touch signals to the curved touch liquid crystal display module. Based on the feedback from the curved touch liquid crystal display module, the response information is determined. The information acquisition unit is used to collect the response information.

5. The performance testing system for liquid crystal display modules according to claim 1, characterized in that, After the signal simulation module transmits the touch signal to the edge of the curved touch LCD display module, if the position calibration unit receives the abnormal signal and the touch signal at the current moment, the position calibration unit is used to analyze the touch signal and determine the touch area corresponding to the touch signal; The touch area is dynamically expanded at the edges to adjust the touch area. The touch area is calibrated based on the touch area.

6. The performance testing system for liquid crystal display modules according to claim 5, characterized in that, After the signal simulation module transmits the touch signal to the curved touch LCD display module, when the type of the touch signal is multi-touch and there is a difference between the key information and the touch signal, the touch signal is analyzed and the touch signal is split into at least one type of single-touch touch signal. Based on at least one touch signal of type single-point touch, at least one touch signal is transmitted to the curved touch liquid crystal display module, and the response information is determined based on the feedback from the curved touch liquid crystal display module. The information acquisition unit is used to extract the key information respectively. If the key information corresponding to at least one of the touch signals differs from the touch signal, the signal simulation module is used to transmit at least one of the abnormal signals and at least one corresponding touch signal to the position calibration unit, and the position calibration unit is used to calibrate the touch area corresponding to the touch signal.

7. The performance testing system for a liquid crystal display module according to claim 6, characterized in that, After the position calibration unit receives at least one of the abnormal signals and the touch signals, if there is a case where the touch area corresponding to at least one of the touch signals is located at the edge of the curved touch liquid crystal display module, the position calibration unit is used to first perform edge expansion processing and calibration on the touch area separately, and then calibrate the touch areas corresponding to the other touch signals.

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