CN110767133A - Automatic inspection method for original screen - Google Patents
Automatic inspection method for original screen Download PDFInfo
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- CN110767133A CN110767133A CN201911093666.5A CN201911093666A CN110767133A CN 110767133 A CN110767133 A CN 110767133A CN 201911093666 A CN201911093666 A CN 201911093666A CN 110767133 A CN110767133 A CN 110767133A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0278—Detecting defects of the object to be tested, e.g. scratches or dust
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Abstract
The invention provides an automatic inspection method of an original screen, which comprises the following steps: the first step is as follows: establishing a pixel point image characteristic reference database of an original screen; the second step is as follows: acquiring pixel point image characteristic data of a detected screen; the third step: comparing the acquired pixel point image characteristic data of the tested screen with pixel point image characteristics of the original screen stored in a pixel point image characteristic reference database of the original screen to judge whether the tested screen is the original screen or not; the pixel point image characteristics comprise screen pixel arrangement characteristics and/or luminance values and/or reflectivity values of the screen under specific conditions.
Description
Technical Field
The invention relates to the field of hardware detection, in particular to an automatic inspection method for an original screen.
Background
With the rapid development of science and technology, the updating speed of the mobile phone is accelerated, and the transaction of the second-hand mobile phone is further promoted. The screen is used as a main interface for mobile phone operation interaction, the original screen can provide the best display effect and function, and in second-hand transaction, the quality of the equipment screen determines whether the transaction is successful.
In the early stage, screen discrimination mainly relies on human discrimination, mainly including:
1. directly checking the appearance and display of the screen;
2. whether the inside has the sign, changes the trace is examined to come down through dismantling the screen from the cell-phone.
Firstly, the two artificial judgments are not strict enough, and the judgment of the display effect through the appearance and naked eyes is not accurate; on the other hand, the damage to the mobile phone is large by disassembling the screen, and the mobile phone does not have a standard to measure the quality of the screen, so that the disassembly and the restoration of the mobile phone require that a worker has operation capability and consumes time.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an automatic inspection method for an original screen, which can confirm the quality of the screen through scientific test data without disassembling the screen.
According to the invention, the automatic inspection method of the original screen comprises the following steps:
the first step is as follows: establishing a pixel point image characteristic reference database of an original screen;
the second step is as follows: acquiring pixel point image characteristic data of a detected screen;
the third step: and comparing the acquired pixel point image characteristic data of the tested screen with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen so as to judge whether the tested screen is the original screen.
Preferably, in the third step, the acquired pixel point image characteristic data of the detected screen is compared with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen through the cloud network.
Preferably, the pixel point image characteristics include a screen pixel arrangement characteristic and/or a luminance value and/or a reflectance value of the screen under a specific condition.
Preferably, in the third step, when the consistency between the screen pixel arrangement characteristic of the tested screen and the screen pixel arrangement characteristic of the original screen reaches a predetermined ratio, the tested screen is judged to be the original screen, otherwise, the tested screen is judged not to be the original screen.
Preferably, in the third step, when the difference between the brightness value of the tested screen under the specific condition and the brightness value of the original screen under the specific condition is less than a predetermined threshold, the tested screen is judged to be the original screen, otherwise, the tested screen is judged not to be the original screen; or judging that the measured screen is the original screen when the difference value between the reflectivity value of the measured screen under the specific condition and the reflectivity value of the original screen under the specific condition is within the threshold range, otherwise judging that the measured screen is not the original screen.
Preferably, in the third step, the screen to be tested is judged to be the original screen if the consistency between the screen pixel arrangement characteristic of the screen to be tested and the screen pixel arrangement characteristic of the original screen reaches a predetermined ratio and the difference between the brightness value of the screen to be tested under the specific condition and the brightness value of the original screen under the specific condition is less than a predetermined threshold, otherwise, the screen to be tested is judged not to be the original screen.
Preferably, the creating of the original screen reference database comprises: aiming at the original screen to be detected, the pixel point image characteristics displayed by the original screen in a preset display picture are collected in a microscope fixed-focus shooting mode, and therefore a pixel point image characteristic reference database of the original screen is established.
Preferably, the acquiring of the image characteristic data of the pixel point of the detected screen includes: and acquiring the image characteristics of the pixel points displayed by the measured screen when the screen is displayed in a preset display picture by means of fixed-focus shooting of a microscope.
Preferably, the original screen is an original screen of the electronic device.
Preferably, a non-original screen pixel point image feature reference database is established, wherein the non-original screen pixel point image feature reference database contains screen pixel point image feature data determined as a non-original screen, and is used for comparing the acquired pixel point image feature data of the detected screen.
The invention obtains the data for determining the screen quality by determining the characteristics of the screen, quantizing the actual parameters, based on the accumulation and the technical analysis of laboratory screen test data, and by arranging the screen pixels and making the brightness value under the specific condition in the specific range, analyzes and judges the screen attribute, and can confirm the screen quality by scientific test data without disassembling the screen.
Drawings
A more complete understanding of the present invention, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
fig. 1 schematically shows a flowchart of an automated verification method of a genuine screen according to a preferred embodiment of the present invention.
Fig. 2 schematically shows an example of a screen testing apparatus employed in the automatic inspection method of a genuine screen according to a preferred embodiment of the present invention.
Fig. 3 is a schematic view of a first height adjustment device in an example of a screen test device.
Fig. 4 is a schematic view of a second height adjustment device in an example of a screen test device.
It is to be noted, however, that the appended drawings illustrate rather than limit the invention. It is noted that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.
Detailed Description
In order that the present disclosure may be more clearly and readily understood, reference will now be made in detail to the present disclosure as illustrated in the accompanying drawings.
Fig. 1 schematically shows a flowchart of an automated verification method of a genuine screen according to a preferred embodiment of the present invention.
As shown in fig. 1, the method for automatically inspecting a genuine screen according to a preferred embodiment of the present invention includes:
first step S1: establishing a pixel point image characteristic reference database of an original screen;
specifically, for example, creating the original screen reference database includes: aiming at an original screen to be detected (namely, the original screen of the type and/or the later type of the detected screen), the pixel point image characteristics displayed by the standard original screen when a display picture is preset are collected in a microscope fixed-focus shooting mode, and therefore a pixel point image characteristic reference database of the original screen is established. Therefore, a pixel point image characteristic basic database of the original screen aiming at the non-original screen is formed.
Preferably, the image characteristics of the pixel points displayed by the original screen in a preset display picture can be collected for all available brands and models.
In fact, the original screen can be the original screen of the mobile phone, and can also be the original screen of any type of electronic equipment.
Second step S2: acquiring pixel point image characteristic data of a detected screen;
for example, acquiring the image characteristic data of the pixel point of the tested screen includes: and acquiring the image characteristics of the pixel points displayed by the measured screen when the screen is displayed in a preset display picture by means of fixed-focus shooting of a microscope.
Third step S3: and comparing the acquired pixel point image characteristic data of the tested screen with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen so as to judge whether the tested screen is the original screen.
Preferably, the acquired pixel point image characteristic data of the detected screen is compared with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen through a cloud network. That is to say. The step compares the screen pixel points to be tested with the image characteristics in the basic database through the cloud network by utilizing the consistency of the screen pixel points.
Specifically, for example, the pixel point image characteristics include a screen pixel arrangement characteristic and/or a luminance value of the screen under a specific condition.
In one embodiment, in the third step S3, when the consistency between the screen pixel arrangement characteristic of the tested screen and the screen pixel arrangement characteristic of the original screen reaches a predetermined ratio, the tested screen is determined to be the original screen, otherwise, the tested screen is determined not to be the original screen. Also, for example, the predetermined ratio may be adjusted based on detection criteria. Or judging that the measured screen is the original screen when the difference value between the reflectivity value of the measured screen under the specific condition and the reflectivity value of the original screen under the specific condition is within the threshold range, otherwise judging that the measured screen is not the original screen.
In another embodiment, in the third step S3, when only the difference between the brightness value of the tested screen under the specific condition and the brightness value of the original screen under the specific condition is less than the predetermined threshold, the tested screen is determined to be the original screen, otherwise, the tested screen is determined not to be the original screen. Also, for example, the predetermined threshold may be adjusted based on detection criteria.
In still another embodiment, in the third step S3, the screen to be tested is determined to be the original screen if the consistency between the screen pixel arrangement characteristic of the screen to be tested and the screen pixel arrangement characteristic of the original screen reaches the predetermined ratio and the difference between the brightness value of the screen to be tested under the specific condition and the brightness value of the original screen under the specific condition is less than the predetermined threshold, otherwise, the screen to be tested is determined not to be the original screen.
Further preferably, a non-original screen pixel point image feature reference database may be further established, wherein the reference database includes screen pixel point image feature data determined as a non-original screen (for example, a back-pressed screen), and is used for comparing the acquired pixel point image feature data of the detected screen.
In actual operation, the operation of the invention is simple and convenient, for example, for the setting of the screen to be tested, only the automatic brightness is needed to be closed, the brightness maximum value is needed to be set, the power keeping amount is higher than 10%, the power saving (low power) mode is needed to be closed, the eye protection mode is needed to be closed, the original color display of iPhone is needed to be closed, and the test sample drawing is led in. Then, setting a display picture of a screen to be tested as a imported test sample picture; placing the screen to be measured under an electron microscope, adjusting the height, confirming that the obtained display pixel image is clear, recording the pixel image and numbering; placing the spectroradiometer on a mobile phone screen, and testing to obtain a corresponding brightness value; and uploading the recorded pixel map and the brightness value to a system, and automatically judging and outputting a judgment result through the system.
In summary, the present invention obtains data for determining screen quality by determining the characteristics of a screen, quantifying actual parameters, accumulating and analyzing the laboratory screen test data, obtaining data for determining screen quality by arranging screen pixels and making luminance values under specific conditions within a specific range, analyzing and judging screen attributes, and performing screen quality confirmation by scientific test data without disassembling the screen.
In addition, compared with the prior art, the invention can achieve the following beneficial effects:
1. testing through equipment to obtain effective data for judgment, and determining judgment standardization;
2. the mobile phone operation is simplified, and the required worker operation difficulty is reduced;
3. and the complex operation is reduced, and the judgment efficiency is improved through an algorithm.
< example of Screen test device >
As shown in fig. 3, in the present invention, as an example of the implementation method, a screen test apparatus may be employed which includes: the electronic equipment screen 11 is placed below the detection platform 10; the image acquisition device 12 is fixedly arranged on the detection platform 10 and is used for acquiring image information on the screen 11 of the electronic device; and the brightness test device 13 is fixedly arranged on the detection platform 10 and is used for testing the brightness of the screen 11 of the electronic device.
The preferred technical scheme is that the image acquisition equipment 12 is an industrial CCD; the luminance test device 13 is a spectroradiometer.
In order to make the detection platform 10 more stable, the preferable technical solution is that the method further comprises: base 14 and stand 15, stand 15 vertical fixation sets up on the base 14, testing platform 10 with base 14 mutual parallel arrangement, testing platform 10 sets up perpendicularly on stand 15.
Through fixed image acquisition equipment 12 and the luminance test equipment 13 that sets up on testing platform 10, electronic equipment screen 11 places in proper order and takes a picture and detect the standard test picture under the brightest state of electronic equipment screen 11 below image acquisition equipment 12 and luminance test equipment 13, the cell-phone is placed on base 14, testing platform 10 sets up on stand 15, it can be stable to make between testing platform 10 and the cell-phone, thereby carry out the analysis contrast to current electronic equipment screen 11 and original equipment screen, avoid handheld device and manual observation to inspect the screen, it is more stable during data collection, it is accurate, the detection precision has been improved, detection number of times has been reduced, and then detection efficiency has been improved.
In order to adjust the height between the detection platform 10 and the electronic device screen 11, it is preferable that the detection platform 10 is connected to the upright 15 through a first height adjustment device 20.
The preferred technical scheme is that the first height adjusting device 20 is a telescopic rod, one end of the telescopic rod is fixedly connected with the upright post 15, and the other end of the telescopic rod is fixedly connected with the detection platform 10. Through adjusting the telescopic link, make the height between testing platform 10 and the electronic equipment screen 11 change, and then adjust the height between image acquisition equipment 12 and the electronic equipment screen 11, make image acquisition equipment 12 fine setting focus can gather standard test picture pixel clarity state.
Another possible embodiment of the first height adjusting device 20 is, as shown in fig. 3, a preferred technical solution is that the first height adjusting device 20 is a first screw rod lifter, a first screw rod 21 of the first screw rod lifter is perpendicular to the base 14, a slide 16 is arranged on a side surface of the upright post 15 corresponding to the first height adjusting device 20 along the height direction, a first body 22 of the first screw rod lifter is arranged in the slide 16 and can slide up and down in the slide 16, and the detecting platform 10 is fixedly connected to the first body 22 of the first screw rod lifter.
Through the knob of rotatory first spiral shell lift screw mandrel riser, realize that first body 22 moves on first lead screw 21, first body 22 sets up in slide 16 and can slide from top to bottom in slide 16, makes testing platform 10 can stably go up and down, and finally image acquisition equipment 12 and electronic equipment screen 11 between high, then carry out focus fine adjustment to image acquisition equipment 12, make image acquisition equipment 12 can clearly shoot the pixel of standard test picture on electronic equipment screen 11, improved the collection precision, it is more convenient to operate.
In order to adjust the height between the brightness test device 13 and the electronic device screen 11, it is preferable that the brightness test device 13 is connected to the detection platform 10 through a second height adjustment device 30.
The preferred technical scheme is that the second height adjusting device 30 is a telescopic rod, one end of the telescopic rod is fixedly connected with the brightness testing device 13, and the other end of the telescopic rod is fixedly connected with the detection platform 10. Through adjusting the telescopic link, make the height between luminance test equipment 13 and the electronic equipment screen 11 change, make luminance test equipment 13 can test screen brightness.
Another possible implementation manner of the second height adjusting device 30 is, as shown in fig. 4, a preferred technical solution is that the second height adjusting device 30 is a second screw rod lifter, a second body 31 of the second screw rod lifter is fixedly connected to the detecting platform 10, and a second screw rod 32 of the second screw rod lifter passes through the even number of detecting platforms 10 and is fixedly connected to the luminance testing apparatus 13; and a sliding rod 33 is vertically and fixedly arranged at the upper end of the brightness test device 13, and the sliding rod 33 penetrates through the detection platform 10.
The working principle and the technical effect of the technical scheme are as follows:
the second body 31 can move on the second screw rod 32 by rotating a knob of the second screw rod lifter, the sliding rod 33 penetrates through the detection platform 10 and can slide up and down in the detection platform 10, and the brightness test equipment 13 is lifted and lowered by the second screw rod 32 due to the fact that the detection platform 10 is fixed by the first screw rod lifter, and finally the height between the brightness test equipment 13 and the electronic equipment screen 11 is increased, so that the brightness test equipment 13 can test the brightness of the screen, the acquisition efficiency is improved, and the operation is more convenient.
In order to enable the device to automatically detect, a preferred technical solution is that the device further includes a host, and the image acquisition device 12 and the brightness test device 13 are both in signal connection with the host.
Displaying a standard test picture on the electronic equipment screen 11, adjusting the height by the image acquisition equipment 12, then performing focal length fine adjustment, acquiring a picture of the standard test picture displayed on the electronic equipment screen 11, then adjusting the electronic equipment screen 11 to be brightest, moving the electronic equipment screen 11 to the lower part of the brightness test equipment 13, adjusting the distance between the brightness test equipment 13 and the electronic equipment screen 11, so that the brightness test equipment 13 can test the brightness and the reflectivity of the screen, transmitting the acquired signals to a host by the image acquisition equipment 12 and the brightness test equipment 13, comparing the acquired brightness and reflectivity data with the brightness and reflectivity data of the standard screen by the host, setting a threshold by the host, and judging as an original product when the difference value between the acquired brightness and reflectivity data and the brightness and reflectivity data of the standard screen is within the range of the threshold, thereby assessing whether the electronic device screen 11 is an original screen.
In addition, it should be noted that the terms "first", "second", "third", and the like in the specification are used for distinguishing various components, elements, steps, and the like in the specification, and are not used for representing a logical relationship or a sequential relationship between the various components, elements, steps, and the like, unless otherwise specified.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. An automatic inspection method of original screen is characterized by comprising the following steps:
the first step is as follows: establishing a pixel point image characteristic reference database of an original screen;
the second step is as follows: acquiring pixel point image characteristic data of a detected screen;
the third step: and comparing the acquired pixel point image characteristic data of the tested screen with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen so as to judge whether the tested screen is the original screen.
2. The method according to claim 1, wherein in the third step, the acquired pixel point image characteristic data of the screen to be tested is compared with the pixel point image characteristic of the original screen stored in the pixel point image characteristic reference database of the original screen through a cloud network.
3. The method for automatically inspecting a self-contained screen according to claim 1 or 2, wherein the image features of the pixel points comprise the arrangement features of the pixels of the screen and/or the brightness values and/or the reflectivity values of the screen under specific conditions.
4. The automated original screen inspection method according to claim 1 or 2, wherein in the third step, it is judged that the screen to be inspected is the original screen when the consistency of the screen pixel arrangement characteristic of the screen to be inspected and the screen pixel arrangement characteristic of the original screen reaches a predetermined ratio, and otherwise, it is judged that the screen to be inspected is not the original screen.
5. The automatic inspection method of the screen-in-place according to claim 1 or 2, characterized in that, in the third step, the screen-in-place is judged to be the screen-in-place when the difference between the luminance value of the screen-in-place under the specific condition and the luminance value of the screen-in-place under the specific condition is less than a predetermined threshold, otherwise, the screen-in-place is judged not to be the screen-in-place; or judging that the measured screen is the original screen when the difference value between the reflectivity value of the measured screen under the specific condition and the reflectivity value of the original screen under the specific condition is within the threshold range, otherwise judging that the measured screen is not the original screen.
6. The automated original screen inspection method according to claim 1 or 2, wherein in the third step, it is judged that the screen to be inspected is the original screen in a case where the consistency of the screen pixel arrangement characteristic of the screen to be inspected and the screen pixel arrangement characteristic of the original screen reaches a predetermined ratio and the difference between the luminance value of the screen to be inspected under a specific condition and the luminance value of the original screen under a specific condition is less than a predetermined threshold, and otherwise, it is judged that the screen to be inspected is not the original screen.
7. The automated checking method of the original screen according to claim 1 or 2, wherein the establishing of the original screen reference database comprises: aiming at the original screen to be detected, the pixel point image characteristics displayed by the original screen in a preset display picture are collected in a microscope fixed-focus shooting mode, and therefore a pixel point image characteristic reference database of the original screen is established.
8. The automatic inspection method of the original screen according to claim 1 or 2, wherein the obtaining of the pixel point image feature data of the tested screen comprises: and acquiring the image characteristics of the pixel points displayed by the measured screen when the screen is displayed in a preset display picture by means of fixed-focus shooting of a microscope.
9. The method for automatically inspecting a self-contained screen according to claim 1 or 2, wherein the self-contained screen is a self-contained screen of an electronic device.
10. The method for automatically inspecting a genuine screen according to claim 1 or 2, wherein a non-genuine screen pixel point image feature reference database is created, which contains the screen pixel point image feature data determined as a non-genuine screen, for comparison with the acquired pixel point image feature data of the tested screen.
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