CN115824586A - Automatic detection method and device for display module - Google Patents
Automatic detection method and device for display module Download PDFInfo
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Abstract
The invention discloses an automatic detection method and device for a display module, which are characterized in that the voltage value and the current value of each target circuit in the display module when a detection item runs are obtained and compared with the voltage value and the current value which are calibrated in advance and correspond to the target circuit under the detection item, so that the detection result corresponding to the detection item is obtained, whether the detection item is qualified or not is judged, when all the detection items are judged to be qualified, the detection result of the display module is qualified, and otherwise, the detection result of the display module is unqualified. Compared with the prior art, the detection result of the display module can be automatically obtained, the test result is obtained without observing a test picture through human eyes, the detection efficiency is high, and the detection result is accurate.
Description
Technical Field
The invention relates to the technical field of display module testing, in particular to a display module automatic detection method and device.
Background
All there is the display module assembly on electronic equipment such as cell-phone, panel computer or display, and the display module assembly needs to carry out functional detection when dispatching from the factory, like display test, touch test and luminance test etc.. The display module is powered and provides a test signal, so that the display module displays a test picture to execute various functional detections. However, the test result is obtained by observing the test picture through human eyes, the test efficiency is low, and the test error is large.
Accordingly, there is a need in the art for improvements and enhancements.
Disclosure of Invention
The invention mainly aims to provide a method and a device for automatically detecting a display module, and aims to solve the problems of low test efficiency and large test error in the prior art.
In order to achieve the above object, a first aspect of the present invention provides an automatic detection method for a display module, where the method includes:
acquiring voltage values and current values of all target circuits in a display module when a detection item runs by adopting a current monitoring chip to obtain a first voltage data set and a first current data set;
obtaining a second voltage data set and a second current data set which are calibrated in advance and correspond to the detection items based on the model of the display module;
comparing voltage values in the first voltage data set and the second voltage data set corresponding to each target circuit and current values in the first current data set and the second current data set to obtain a detection result corresponding to a detection item;
when the detection item is judged to be unqualified according to the detection result, judging the detection result of the display module to be unqualified; otherwise, updating the detection items and detecting again until all the detection items are judged to be qualified, and judging the detection result of the display module to be qualified.
Optionally, the detection items are further provided with a grading mode, and the grading mode is used for displaying different backlight brightness on the display module when the detection items are operated.
Optionally, the voltage values of all target circuits in the display module when the current monitoring chip is used for collecting and detecting the operation of the item are obtained, and a first voltage data set is obtained, which includes:
collecting pin voltage values of all target circuits in the display module by adopting a current monitoring chip;
and inputting the pin voltage value after the voltage value is divided by a resistor into an analog-to-digital converter to obtain the first voltage data set.
Optionally, the method further includes: and expanding the channel number of the current monitoring chip by adopting an analog switch chip.
Optionally, the current value of all target circuits in the display module when adopting the current monitoring chip to collect the detection item operation obtains a first current data set, including:
determining a conversion relation between a voltage value and a current value based on the current monitoring chip;
converting each voltage value in the first voltage data set into a current value based on the conversion relation to obtain the first current data set.
The second aspect of the present invention provides an automatic detection device for a display module, wherein the device comprises:
the display module automatic detection method comprises a storage unit, a processing unit, a current monitoring chip and a display module automatic detection program which is stored on the storage unit and can run on the processing unit, wherein the current monitoring chip is used for collecting a voltage value and a current value of a target circuit in the display module when a detection item runs, and the display module automatic detection program is executed by the processor to realize the steps of any one of the display module automatic detection methods.
Optionally, the current monitoring chip is an INA199A1DCKR chip.
Optionally, an analog switch chip for expanding the number of channels of the current monitoring chip is further provided.
Optionally, the analog switch chip is a CD74HC4067 chip.
Optionally, the current monitoring device is further provided with a resistance voltage division module and an analog-to-digital conversion module, wherein the resistance voltage division module is electrically connected with the current monitoring chip and is used for performing resistance voltage division on the voltage acquired by the current monitoring chip and then inputting the voltage into the analog-to-digital conversion module and outputting a voltage value.
Therefore, the voltage value and the current value of each target circuit in the display module when the detection item runs are obtained, and are compared with the voltage value and the current value corresponding to the target circuit under the detection item which are calibrated in advance, so that the detection result corresponding to the detection item is obtained, whether the detection item is qualified or not is judged, when all the detection items are judged to be qualified, the detection result of the display module is qualified, and otherwise, the detection result of the display module is unqualified. Compared with the prior art, the detection result of the display module can be automatically obtained, the test result is obtained without observing a test picture through human eyes, the detection efficiency is high, and the detection result is accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic view illustrating a specific flow chart of an automatic detection method for a display module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a specific process for acquiring a voltage value of a target circuit in step S100 of the embodiment of FIG. 1;
FIG. 3 is a schematic diagram of a resistor divider circuit in the embodiment of FIG. 1;
FIG. 4 is a schematic diagram of an embodiment of FIG. 1 in which an analog switch chip is used to extend the voltage path;
FIG. 5 is a schematic diagram of an extended current path using an analog switch chip in the embodiment of FIG. 1;
fig. 6 is a schematic structural diagram of an automatic detection device for a display module according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a connection circuit of the current monitoring chip in the embodiment of FIG. 6.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when 8230that is," or "once" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted depending on the context to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited by the specific embodiments disclosed below.
The display module in the invention refers to a display screen on a mobile terminal such as a mobile phone and a tablet personal computer or a display screen on various electronic devices such as an electronic watch and a sports bracelet. When the display module is delivered from a factory, functional detection, such as pure color detection, gray level detection and the like, needs to be performed. The pure color detection is detection of five colors of black, white, red, green and blue, whether full black light leakage is serious or not and the uniformity of brightness in full white are mainly seen, each color item is tested once, and bright points, dead spots, colored spots and the like are carefully searched; the gray level detection mainly detects whether each gray level can be clearly seen, and the clearer the boundary of gray level transition is, the stronger the layering sense of the display is; the color detection mainly detects the color level and the color expression of the display module. When the display module is detected, the operation result of each detection item needs to judge whether the currently tested display module is qualified or not by observing the test picture through human eyes, so that the test efficiency is low, and the test error is large.
Through practical detection, the quality of screen display can be fed back in current and voltage to a certain extent. Therefore, the voltage and the current of the circuit needing to be detected of the current tested screen and the voltage and the current of the corresponding circuit of the qualified screen can be compared, and whether the current tested screen is qualified or not can be obtained according to the deviation degree of the voltage and the current. The qualified screen refers to a screen with the same model as the currently tested screen and qualified function.
Therefore, the invention provides an automatic detection method of a display module, which is characterized in that the voltage value and the current value of each circuit to be detected of the currently tested display module under each detection item are collected and compared with the pre-calibrated voltage value and current value, so that the detection result is automatically obtained. The detection is convenient and accurate, and the efficiency is high.
Exemplary method
As shown in fig. 1, an embodiment of the invention provides an automatic detection method for a display module, which is implemented on a display module testing device. During the concrete test, only need to test the winding displacement lock joint of display module assembly currently and just can directly indicate whether qualified display module assembly of current test is to the display module assembly test equipment, realize display module assembly's automatic test, efficiency of software testing is high, the test is accurate. Specifically, the method comprises the following steps:
step S100: acquiring voltage values and current values of all target circuits in a display module when a detection item runs by adopting a current monitoring chip to obtain a first voltage data set and a first current data set;
specifically, when the display module is detected, a plurality of detection items need to be detected one by one. Test items, i.e. individual test items, are commonly such as: pure color, 256 levels of gray, contrast, etc. The granularity of the detection items can be changed according to the needs, for example, the detection of the five colors of black, white, red, green and blue can be used as a pure color detection item, and the detection of the five colors of black, white, red, green and blue can also be used as an independent detection item respectively.
The target circuit of the display module refers to each circuit to be tested in the display module, and the following table lists 10 target circuits of the display module tested in this embodiment.
| Serial number | Voltage of | Description of the |
| 1 | AP1.2V | Inner core circuit of |
| 2 | AP1.8V | IO circuit of |
| 3 | BL_P_A | First group backlight circuit of |
| 4 | BL_P_A | Second group backlight circuit of |
| 5 | AP3.0V | Display screen 3.0 |
| 6 | AP5V7+ | Positive 5.7V driving circuit of |
| 7 | AP5V7- | Display screen negative 5.7 |
| 8 | AVDD | AVDD driving circuit of display screen |
| 9 | ELVSS | Display screen |
| 10 | ELVDD | Display screen ELVDD drive circuit |
The number of target circuits of different display modules is different, and is generally 5 to 10. And when the detection items are operated, simultaneously obtaining the voltage value and the current value of each target circuit, and respectively combining the voltage values and the current values of all the target circuits to form a first voltage data set and a first current data set.
The detection items of the embodiment include: pure color pictures such as red, green, blue, gray, etc., color pictures, black refresh rate and four white refresh rates, which are 10 items of detection in total. When each detection item is operated, a corresponding interface is displayed on the display module, and the display module testing equipment simultaneously collects the voltage values and the current values of 10 paths of target circuits listed in the upper table in the display module.
In this embodiment, a current monitoring chip, such as INA199A1DCKR of TI, is integrated on the display module detection device, and the pins of the current monitoring chip are connected to each target circuit on the display module through a flat cable and a connection circuit, so as to collect the voltage value of each target circuit.
Further, in order to detect richer voltage data, a grading mode can be set according to the backlight brightness under the test item. When the test items are operated, the backlight brightness on the display module is changed from off, 10% brightness, 20% brightness to 100% brightness and other various levels. For example: in the red picture test process, the voltage value of the backlight brightness on the display module is tested when the backlight brightness is completely extinguished, and then the backlight brightness is adjusted to be the voltage value of 10% brightness until the backlight brightness is the voltage value of 100% brightness.
In this embodiment, as shown in fig. 2, the step of acquiring the voltage value of the target circuit specifically includes the following steps:
step S110: collecting pin voltage values of all target circuits in the display module by adopting a current monitoring chip;
specifically, the current monitoring chip connects pins thereof to each target circuit on the display module through the flat cable and the connection circuit, and collects pin voltage values of each target circuit.
Step S120: and inputting the pin voltage value after the voltage value is divided by a resistor into an analog-to-digital converter to obtain a first voltage data set.
Specifically, since the pin voltage value may exceed the input voltage of the analog-to-digital converter, the pin voltage value needs to be divided by a resistor and then input to the analog-to-digital converter to generate a voltage value corresponding to each target circuit, and the voltage values of all the target circuits constitute the first voltage data set. As shown in fig. 3, the voltage Vin is divided by resistors R1 and R2, so that the divided voltage is ensured to be within the input voltage range of the analog-to-digital converter, and then is input to the pin of the analog-to-digital converter through the sample-and-hold capacitor C9 to obtain the voltage value Vout. The calculated relationship between the voltage value Vout and the pin voltage value of the target circuit is: vout = Vin × R2/(R1 + R2).
Further, since the number of channels of the circuit monitoring chip is smaller than the number of output channels of the display module, for example, the circuit monitoring chip of this embodiment has only 16 channels, and the number of output channels of the tested display module is 20 (10 channel output voltage values, 10 channel output current values), which exceeds the number of channels of the current monitoring chip, so that the analog switch chip is used to expand the number of channels of the current monitoring chip. Specifically, each input channel of the analog switch chip is connected with the current monitoring chip.
As shown in FIG. 4, a CD74HC4067 analog switch chip is used to extend the voltage channel to 16 channels, one of which is selected by the S0-S3 pins, channel 0 is selected when the values of S0-S3 are "0000", and channel 1 is selected when the values of S0-S3 are "0001". For example: when the channel 0 is selected, the voltage value of the channel APP1V8_ U _ ADC is read.
As shown in fig. 5, another CD74HC4067 analog switch chip is used to expand the number of current channels, and similar to the expansion voltage channel, one channel is selected through the S0-S3 pins, and channel 0 is selected when the values of S0-S3 are "0000", and channel 1 is selected when the values of S0-S3 are "0001". For example: when channel 0 is selected, the current value of channel APP1V8_ I _ ADC is read.
It should be noted that fig. 4 and fig. 5 only exemplarily show one path of current and voltage channel expansion, and each input channel of the analog switch chip CD74HC4067 may be used to expand one path of current and voltage.
After the circuit of the current monitoring chip is analyzed, the relationship between the voltage and the current is determined according to the current monitoring chip, so that the first current data set can be directly obtained according to the first voltage data set.
Firstly, obtaining the amplification gain of a current monitoring chip according to the performance parameters of the current monitoring chip, and then determining the conversion relation between a voltage value and a current value; and converting each voltage value in the first voltage data set into a current value according to the conversion relation to obtain a first current data set.
Specifically, the expression of the conversion relationship of the voltage value and the current value is: vout = (ILoad × Rshunt) GAIN + Vref, where Vout is a voltage value, ILoad is a current value, rshunt is a resistance value of a sampling resistor of the current monitoring chip, GAIN is an amplification GAIN, and Vref is a reference voltage.
Step S200: obtaining a second voltage data set and a second current data set which are calibrated in advance and correspond to the detection items based on the model of the display module;
specifically, before the display module is tested, the display module which is the same as the display module in model and qualified in manual detection is taken, each detection item is operated on the display module, and the voltage value and the current value of each target circuit are stored. The voltage value and the current value can be stored in a background server or a memory of the display module testing equipment.
When the display module is tested, the second voltage data set and the second current data set corresponding to each detection item can be read from the pre-stored data according to the model of the display module.
Step S300: comparing the voltage values in the first voltage data set and the second voltage data set corresponding to each target circuit with the current values in the first current data set and the second current data set to obtain a detection result corresponding to the detection item;
step S400: when the detection item is judged to be unqualified according to the detection result, judging the detection result of the display module to be unqualified; otherwise, updating the detection items and detecting again until all the detection items are judged to be qualified, and judging the detection result of the display module to be qualified.
Specifically, the voltage value and the current value of each target circuit in the first voltage data set and the first current data set are sequentially compared with the voltage value and the current value corresponding to the target circuit in the second voltage data set and the second current data set, so as to obtain the current deviation and the voltage deviation of each target circuit. If the voltage deviation of all the target circuits is within 0.5V and the current deviation is less than 5mA, the detection result corresponding to the detection item is passed or qualified, namely the detection of the display module in the detection item is qualified, otherwise, the display module is directly judged to be unqualified. And then acquiring the next detection item, returning to the step S100 to perform detection again, and sequentially acquiring the judgment result corresponding to each detection item until the judgment results corresponding to all the detection items are qualified, so that the display module is judged to be qualified.
In one embodiment, the current is reflected more on the basis of the abnormality of the display module, or the current values in the first current data set and the second current data set are only compared to obtain the current deviation value, when the current deviations of all the detection items are less than 5mA, the display module is qualified, otherwise, the display module is unqualified.
In the invention, the voltage and the current of the circuit needing to be detected on the display module are detected by adopting the current monitoring chip, and are compared with the pre-calibrated standard numerical value to obtain the detection result of the display module. The automatic detection result judgment can be realized, and the detection efficiency and the accuracy are improved.
In one embodiment, on the basis of realizing the automatic detection of the detection module, the detection equipment of the display module further stores the detection result of each display module under each detection item and sends the detection result to the background server so as to count the yield of the display module, the fault rate of each detection item and the like in real time.
In an embodiment, the display module detection device may further obtain a yield statistical result of the background server, and increase the weight of a certain detection item, such as the detection times and the detection time, in a targeted manner according to the fault rate of each detection item of the currently detected display module.
Exemplary device
As shown in fig. 6, an embodiment of the present invention further provides an automatic detection device for a display module, corresponding to the automatic detection method for a display module, where the automatic detection device for a display module includes: the device comprises a storage unit, a processing unit, a current monitoring chip and a display module automatic detection program which is stored on the storage unit and can run on the processing unit. The current monitoring chip is used for collecting a voltage value and a current value of a target circuit in the display module when the detection item runs, and the display module automatic detection program carries out the following operation instructions when being executed by the processor:
acquiring voltage values and current values of all target circuits in a display module when a detection item runs by adopting a current monitoring chip to obtain a first voltage data set and a first current data set;
obtaining a second voltage data set and a second current data set which are calibrated in advance and correspond to the detection items based on the model of the display module;
comparing voltage values in the first voltage data set and the second voltage data set corresponding to each target circuit and current values in the first current data set and the second current data set to obtain a detection result corresponding to a detection item;
when the detection item is judged to be unqualified according to the detection result, judging the detection result of the display module to be unqualified; otherwise, updating the detection items and detecting again until all the detection items are judged to be qualified, and judging the detection result of the display module to be qualified.
Optionally, the detection items are further provided with a grading mode, and the grading mode is used for displaying different backlight brightness on the display module when the detection items are operated.
Optionally, the voltage values of all target circuits in the display module when the current monitoring chip is used for collecting and detecting the operation of the item are obtained, and a first voltage data set is obtained, which includes:
collecting pin voltage values of all target circuits in the display module by adopting a current monitoring chip;
and inputting the pin voltage value after the voltage value is divided by a resistor into an analog-to-digital converter to obtain the first voltage data set.
Optionally, the method further includes: and expanding the channel number of the current monitoring chip by adopting an analog switch chip.
Optionally, the current value of all target circuits in the display module when adopting the current monitoring chip to collect the detection item operation obtains a first current data set, including:
determining a conversion relation between a voltage value and a current value based on the current monitoring chip;
converting each voltage value in the first voltage data set into a current value based on the conversion relation to obtain the first current data set.
In this embodiment, the model of the current monitoring chip is INA199A1DCKR, and a connection circuit of the current monitoring chip is shown in fig. 7.
In order to expand the number of channels of the current monitoring chip, the detection device is further provided with an analog switch chip for expanding the number of channels of the current monitoring chip, specifically, in this embodiment, two analog switch chips are provided for expanding the number of voltage channels and the number of current channels, respectively, and the model of the analog switch chip is CD74HC4067.
Optionally, the voltage monitoring device is further provided with a resistance voltage dividing unit and an analog-to-digital conversion unit, wherein the resistance voltage dividing unit is electrically connected with the current monitoring chip and is used for performing resistance voltage division on the voltage acquired by the current monitoring chip, inputting the voltage into the analog-to-digital conversion unit and outputting a voltage value.
Specifically, in this embodiment, the specific functions of each unit of the automatic detection apparatus for a display module can refer to the corresponding descriptions in the automatic detection method for a display module, and are not described herein again.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present invention. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the above modules or units is only one logical division, and the actual implementation may be implemented by another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the method when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as required by legislation and patent practice in the jurisdiction.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. The automatic detection method of the display module is characterized by comprising the following steps:
acquiring voltage values and current values of all target circuits in a display module when a detection item runs by adopting a current monitoring chip to obtain a first voltage data set and a first current data set;
obtaining a second voltage data set and a second current data set which are calibrated in advance and correspond to the detection items based on the model of the display module;
comparing voltage values in the first voltage data set and the second voltage data set corresponding to each target circuit and current values in the first current data set and the second current data set to obtain a detection result corresponding to a detection item;
when the detection item is judged to be unqualified according to the detection result, judging the detection result of the display module to be unqualified; otherwise, updating the detection items and detecting again until all the detection items are judged to be qualified, and judging the detection result of the display module to be qualified.
2. The method as claimed in claim 1, wherein the detection items further have a grading mode, and the grading mode is used for displaying different backlight brightness on the display module when the detection items are operated.
3. The method according to claim 1, wherein the acquiring, by the current monitoring chip, the voltage values of all target circuits in the display module during the operation of the detection item to obtain the first voltage data set comprises:
collecting pin voltage values of all target circuits in the display module by adopting a current monitoring chip;
and after the pin voltage value is subjected to resistance voltage division, inputting the pin voltage value into an analog-to-digital converter to obtain the first voltage data set.
4. The method as claimed in claim 3, further comprising:
and expanding the channel number of the current monitoring chip by adopting an analog switch chip.
5. The method according to claim 3, wherein the acquiring, by the current monitoring chip, the current values of all target circuits in the display module during the operation of the detection item to obtain the first current data set comprises:
determining a conversion relation between a voltage value and a current value based on the current monitoring chip;
converting each voltage value in the first voltage data set into a current value based on the conversion relation to obtain the first current data set.
6. The display module automatic detection device is characterized by comprising a storage unit, a processing unit, a current monitoring chip and a display module automatic detection program which is stored on the storage unit and can run on the processing unit, wherein the current monitoring chip is used for collecting voltage values and current values of all target circuits in the display module when a detection item runs, and the display module automatic detection program is executed by the processing unit to realize the steps of the display module automatic detection method according to any one of claims 1 to 5.
7. The apparatus according to claim 6, wherein the current monitor chip is an INA199A1DCKR chip.
8. The automatic detection device for the display module according to claim 7, further comprising an analog switch chip for expanding the number of channels of the current monitor chip.
9. The apparatus according to claim 8, wherein the analog switch chip is a CD74HC4067 chip.
10. The automatic detection device for the display module according to claim 7, further comprising a resistor voltage-dividing unit and an analog-to-digital conversion unit electrically connected to the current monitoring chip, wherein the resistor voltage-dividing unit is configured to perform resistor voltage-dividing on the voltage collected by the current monitoring chip, and then input the voltage into the analog-to-digital conversion unit and output a voltage value.
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| CN202211423665.4A CN115824586A (en) | 2022-11-15 | 2022-11-15 | Automatic detection method and device for display module |
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| CN202211423665.4A Pending CN115824586A (en) | 2022-11-15 | 2022-11-15 | Automatic detection method and device for display module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192822A (en) * | 2023-09-12 | 2023-12-08 | 深圳市鑫美芝实业有限公司 | Intelligent circuit testing system and method based on backlight module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192822A (en) * | 2023-09-12 | 2023-12-08 | 深圳市鑫美芝实业有限公司 | Intelligent circuit testing system and method based on backlight module |
| CN117192822B (en) * | 2023-09-12 | 2024-05-24 | 深圳市鑫美芝实业有限公司 | Intelligent circuit testing system and method based on backlight module |
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