CN117687235A - High ppi display detection human eye auxiliary method - Google Patents
High ppi display detection human eye auxiliary method Download PDFInfo
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- CN117687235A CN117687235A CN202311689128.9A CN202311689128A CN117687235A CN 117687235 A CN117687235 A CN 117687235A CN 202311689128 A CN202311689128 A CN 202311689128A CN 117687235 A CN117687235 A CN 117687235A
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 66
- 238000007689 inspection Methods 0.000 claims abstract description 28
- 239000011521 glass Substances 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 238000010146 3D printing Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 18
- 238000011156 evaluation Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000011895 specific detection Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 2
- 208000003464 asthenopia Diseases 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
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Abstract
The invention discloses a high ppi display detection human eye auxiliary method, which relates to the technical field of liquid crystal module inspection, and is characterized in that a magnifier limit structure suitable for a liquid crystal module is designed and manufactured according to the size and shape of the liquid crystal module, a magnifier frame suitable for the liquid crystal module with specific measurement is manufactured by using a 3D printing technology, a specific magnifier limit structure is installed aiming at the design of the specific magnifier limit structure, limit calibration is completed on a display area of the liquid crystal module, the magnifier limit structure is attached to the edge, the shape and the size of the liquid crystal module, the display area is fully covered, and omission is avoided. According to the invention, the magnifying glass limiting structure is built, the detection is carried out in the sub-region, the magnification is enough, meanwhile, the display region of the liquid crystal display is inspected in the full range, a visual field range controllable inspection mode is formed, the omission of inspection is avoided, the full range display region is divided into a plurality of specific inspection positions, a standardized operation inspection method is formed, and the detection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal module inspection, in particular to a high ppi display detection human eye auxiliary method.
Background
The ppi indicates the number of pixels (pixels) per inch, and the higher the ppi value, the higher the density of the display screen, the higher the display density, and the higher the fidelity, and in the detection of the small-size high ppi liquid crystal module (i.e. the small-size liquid crystal module with higher Pixel density, such as a smart phone screen), the small-size high ppi liquid crystal module generally needs manual inspection due to the extremely small pixels, but when the lighting inspection is performed manually, the dot-like defects are not easy to observe by naked eyes.
The following problems exist in the prior art: the conventional magnifier is used for checking, the magnification of the magnification small magnifier is insufficient, and the pixel points cannot be seen clearly; the magnifying glass with large magnification has sufficient magnifying effect, but has limited disposable inspection range, and can be manually moved for inspection in a full display range, thus being easy to have missed inspection; and human eyes move under a high-magnification magnifying glass for inspection, so that the human eyes are easy to fatigue.
Disclosure of Invention
The invention aims to provide a high ppi display detection human eye auxiliary method for solving the problems in the background technology.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high ppi display detection human eye assist method comprising the steps of:
step one, determining proper magnification according to the resolution and the size of a liquid crystal module, and selecting proper magnification to ensure the details and the precision of an inspection area and reduce the time of visual fatigue;
step two, designing and manufacturing a magnifying glass limiting structure suitable for the liquid crystal module according to the size and the shape of the liquid crystal module;
setting detection indexes, dividing a full-range display area into four specific detection positions by using a magnifying glass limiting structure, and completing full-range detection in the whole liquid crystal module area;
step four, the inspector observes and records all display anomalies in the whole inspection process, and uses a required tool to record and record the observed problems;
and fifthly, counting all recorded problems, providing a proper weight value for the problems, generating a special report, and carrying out overall evaluation of the liquid crystal module.
The technical scheme of the invention is further improved as follows: the second step further comprises the steps of manufacturing a magnifier frame with specific measurement and suitable for the liquid crystal module by using a 3D printing technology, installing a specific magnifier limiting structure according to the design of the specific magnifier limiting structure, completing limiting calibration on a display area of the liquid crystal module, enabling the magnifier limiting structure to be attached to the edge, the shape and the size of the liquid crystal module, fully covering the display area and avoiding omission.
The technical scheme of the invention is further improved as follows: the size of the liquid crystal module is the length of the diagonal line of the screen, and is taken as an inch (in);
the calculation formula of the liquid crystal module size (diagonal length) obtained by calculating the diagonal length of the liquid crystal module size is as follows:
D＝√(W 2 +H 2 )；
wherein W is the width of the liquid crystal module, H is the length of the liquid crystal module, and D is the diagonal length of the liquid crystal module.
The technical scheme of the invention is further improved as follows: the third step also includes that the detection index is divided into pixel offset, color accuracy, brightness and uniformity;
the specific inspection positions are four areas of upper left, lower left, upper right and lower right, and each area is used for detecting pixel offset, color accuracy, brightness and uniformity respectively.
The technical scheme of the invention is further improved as follows: the pixel offset is used for presenting a gap between a position of a pixel on a screen and a theoretical position of the pixel, and a calculation formula is as follows:
Px＝(Δx/D)xP；
where Px represents the percentage of pixel shift, Δx is the distance the pixel actually shifts, D is the display screen diagonal length, and P is the screen resolution;
the color accuracy is used for presenting whether the color displayed on the screen is matched with the true color, and the calculation formula is as follows:
ΔE＝[(ΔL) 2 +(Δa) 2 +(Δb) 2 ]^0.5；
where Δl, Δa, and Δb are the differences between the color displayed on the screen and the true value of that color;
the brightness is used for presenting the brightness level of the screen display, and the calculation formula is as follows:
B＝(L/L0)x100％；
wherein B is brightness, L is brightness actually displayed on the screen, and L0 is a standard brightness value;
the uniformity is used for presenting whether the brightness and the color of different areas on the screen are equal or not, and the calculation formula is calculated as follows:
Δu＝[(u1-u2) 2 +(v1-v2) 2 ]^0.5；
where u1 and v1 are measurements of a particular location on the screen and u2 and v2 are measurements of a reference location on the screen.
The technical scheme of the invention is further improved as follows: the pixel offset is required to be detected one by using an amplifying mirror, the pixel offset is calculated by comparing the difference between the actual pixel position and the theoretical pixel position, and the pixel offset is converted into a percentage value to be evaluated, wherein the pixel offset is within 5%;
the color accuracy is compared with colors displayed on an actual screen by using a color observation table or a standard color card tool, and a color difference value is calculated and evaluated, wherein the color difference value is within 3;
the brightness is measured by using a photometer, the difference between the maximum brightness and the minimum brightness is calculated, the uniformity of the brightness of the screen is evaluated, the difference of the brightness is within 10%, and the uniformity of the brightness is kept above 90%;
the uniformity is measured for brightness and color of different areas by using a sampling probe or photometer, and the contrast with the whole screen is calculated, and the contrast of brightness and color is maintained above 70%.
The technical scheme of the invention is further improved as follows: the fifth step specifically comprises the following steps;
a1, summarizing all recorded problems, and finishing problems and defects in terms of pixel offset, color accuracy, brightness and uniformity recorded previously for each specific inspection position;
a2, assigning weight values to the problems and the defects, assigning all the problems and the defects to different classifications, and assigning a weight value to each classification;
a3, carrying out weighted summation on the weight value of each classification to obtain the total weight value of all the problems and defects;
and A4, judging the overall detection result of the liquid crystal module according to the total weight value and giving a corresponding evaluation conclusion.
The technical scheme of the invention is further improved as follows: the A2 is characterized in that weight values are assigned to the problems and the defects, different weight values are assigned to different problems by using a range of 0-10, wherein 0 points represent no problems, and 10 points represent the most serious problems;
the A3 comprises the following calculation formula for calculating the total weight value:
W＝w1q1+w2q2+…+wn*qn；
wherein each set w and q represents the weight of a problem or defect and its number;
the step A4 includes comparing the total weight value with a predetermined evaluation standard, if the total weight value is smaller than 10, the liquid crystal module is good, the total weight value is between 10 and 20, and the total weight value is larger than 20, so that the whole evaluation of the liquid crystal module is realized.
By adopting the technical scheme, compared with the prior art, the invention has the following technical progress:
1. the invention provides a high ppi display detection human eye auxiliary method, which is characterized in that a magnifying glass limiting structure is built, region detection is carried out, the magnification is ensured to be enough, meanwhile, the display region of a liquid crystal display is inspected in a full range, a visual field range controllable inspection mode is formed, the inspection omission is avoided, the full range display region is divided into a plurality of specific inspection positions, a standardized operation inspection method is formed, and the detection efficiency is improved.
2. The invention provides a high ppi display detection human eye auxiliary method, which does not need professional instruments and equipment and high skill, can be checked by using conventional auxiliary tools such as a magnifying glass, a color card and the like to be matched with a magnifying glass limiting structure, is easy to operate and implement, and can effectively relieve the fatigue of detection personnel by using the magnifying glass limiting structure so as to further ensure the detection precision.
3. The invention provides a high ppi display detection human eye auxiliary method, which can rapidly and accurately detect pixel deviation, color accuracy, brightness and uniformity indexes of a liquid crystal module, greatly improves detection efficiency and accuracy, does not need expensive professional instruments and equipment, has relatively low cost, and can effectively reduce detection cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a flow chart showing a method for detecting human eye assist at high ppi in accordance with the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment 1 as shown in fig. 1, the present invention provides a high ppi display detection human eye auxiliary method, comprising the following steps:
step one, determining proper magnification according to the resolution and the size of a liquid crystal module, and selecting proper magnification to ensure the details and the precision of an inspection area and reduce the time of visual fatigue;
designing and manufacturing a magnifier limit structure suitable for the liquid crystal module according to the size and the shape of the liquid crystal module, manufacturing a magnifier frame suitable for the liquid crystal module with specific measurement by using a 3D printing technology, installing the specific magnifier limit structure aiming at the design of the specific magnifier limit structure, finishing limit calibration on a display area of the liquid crystal module, and enabling the magnifier limit structure to be attached to the edge, the shape and the size of the liquid crystal module, so as to fully cover the display area and avoid omission;
the size of the liquid crystal module is the length of the diagonal line of the screen in inches (in);
the calculation formula of the liquid crystal module size (diagonal length) obtained by calculating the diagonal length of the liquid crystal module size is as follows:
D＝√(W 2 +H 2 )；
wherein W is the width of the liquid crystal module, H is the length of the liquid crystal module, and D is the diagonal length of the liquid crystal module;
setting detection indexes, namely dividing a full-range display area into four specific detection positions by using a magnifier limiting structure, and finishing full-range detection in the whole liquid crystal module area, wherein the detection indexes are divided into pixel offset, color accuracy, brightness and uniformity; the specific inspection positions are four areas of upper left, lower left, upper right and lower right, and each area is used for detecting pixel offset, color accuracy, brightness and uniformity respectively;
step four, the inspector observes and records all display anomalies in the whole inspection process, and uses a required tool to record and record the observed problems;
and fifthly, counting all recorded problems, providing a proper weight value for the problems, generating a special report, and carrying out overall evaluation of the liquid crystal module.
In embodiment 2, as shown in fig. 1, on the basis of embodiment 1, the present invention provides a technical scheme: preferably, the detection index is divided into pixel offset, color accuracy, brightness and uniformity; the specific inspection positions are four areas of upper left, lower left, upper right and lower right, and each area is used for detecting pixel offset, color accuracy, brightness and uniformity respectively;
the pixel offset is used for representing the difference between the position of the pixel on the screen and the theoretical position of the pixel, and the calculation formula is as follows:
Px＝(Δx/D)xP；
wherein Px represents the percentage of pixel offset, deltax is the distance of actual offset of the pixel, D is the diagonal length of the display screen, P is the screen resolution, the pixel offset needs to be detected one by one for each region by using a magnifying glass, the pixel offset is calculated by comparing the difference between the actual pixel position and the theoretical pixel position, and is converted into a percentage value for evaluation, and the pixel offset is within 5%;
the color accuracy is used for presenting whether the color displayed on the screen is matched with the true color, and the calculation formula is as follows:
ΔE＝[(ΔL) 2 +(Δa) 2 +(Δb) 2 ]^0.5；
wherein Δl, Δa, and Δb are the differences between the colors displayed on the screen and the true values of the colors, and the color accuracy is compared with the colors displayed on the actual screen by using a color look-up table or a standard color card tool, and color difference values are calculated and evaluated, the color difference values being within 3;
the brightness is used for presenting the brightness level of the screen display, and the calculation formula is as follows:
B＝(L/L0)x100％；
wherein B is brightness, L is the brightness actually displayed by the screen, L0 is a standard brightness value, the brightness is measured by using a photometer, the difference between the maximum brightness and the minimum brightness is calculated, the uniformity of the brightness of the screen is evaluated, the brightness difference is within 10%, and the uniformity of the brightness is maintained above 90%;
the uniformity is used to present whether the brightness and color of different areas on the screen are equal or not, and the calculation formula is calculated as:
Δu＝[(u1-u2) 2 +(v1-v2) 2 ]^0.5；
where u1 and v1 are measurements of specific locations on the screen, u2 and v2 are measurements of reference locations on the screen, uniformity is measured by using a sampling probe or photometer to measure the brightness and color of the different areas, and the contrast with the entire screen is calculated, with the brightness and color contrast maintained above 70%.
Embodiment 3 as shown in fig. 1, on the basis of embodiment 1-2, the present invention provides a technical scheme: preferably, the fifth step specifically comprises the following steps;
a1, summarizing all recorded problems, and finishing problems and defects in terms of pixel offset, color accuracy, brightness and uniformity recorded previously for each specific inspection position;
a2, assigning weight values to the problems and the defects, assigning all the problems and the defects to different classifications, assigning a weight value to each classification, assigning weight values to the problems and the defects, and assigning different weight values to different problems by using a range of 0-10, wherein 0 is no problem, and 10 is the most serious problem;
a3, carrying out weighted summation on the weight value of each category to obtain the total weight value of all the problems and defects, wherein the total weight value is calculated by adopting the following calculation formula:
W＝w1q1+w2q2+…+wn*qn；
wherein each set w and q represents the weight of a problem or defect and its number;
and A4, judging the detection result of the whole liquid crystal module according to the total weight value, giving a corresponding evaluation conclusion, and comparing the total weight value with a predetermined evaluation standard, wherein if the liquid crystal module with the total weight value smaller than 10 is good, the liquid crystal module with the total weight value smaller than 10 is general, and the liquid crystal module with the total weight value larger than 20 is problematic, so that the whole evaluation of the liquid crystal module is realized.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A high ppi display detection human eye assist method, characterized by: the method comprises the following steps:
step one, determining proper magnification according to the resolution and the size of a liquid crystal module;
step two, designing and manufacturing a magnifying glass limiting structure suitable for the liquid crystal module according to the size and the shape of the liquid crystal module;
setting detection indexes, dividing a full-range display area into four specific detection positions by using a magnifying glass limiting structure, and completing full-range detection in the whole liquid crystal module area;
step four, the inspector observes and records all display anomalies in the whole inspection process, and uses a required tool to record and record the observed problems;
and fifthly, counting all recorded problems, providing a proper weight value for the problems, generating a special report, and carrying out overall evaluation of the liquid crystal module.
2. The high ppi display detection eye-assist method of claim 1, wherein: the second step further comprises the steps of manufacturing a magnifier frame with specific measurement and suitable for the liquid crystal module by using a 3D printing technology, installing a specific magnifier limiting structure according to the design of the specific magnifier limiting structure, completing limiting calibration on a display area of the liquid crystal module, enabling the magnifier limiting structure to be attached to the edge, the shape and the size of the liquid crystal module, and fully covering the display area.
3. The high ppi display detection eye-assist method of claim 1, wherein: the size of the liquid crystal module is the length of the diagonal line of the screen, and is taken as an inch (in);
the calculation formula of the liquid crystal module size (diagonal length) obtained by calculating the diagonal length of the liquid crystal module size is as follows:
wherein W is the width of the liquid crystal module, H is the length of the liquid crystal module, and D is the diagonal length of the liquid crystal module.
4. The high ppi display detection eye-assist method of claim 1, wherein: the third step also includes that the detection index is divided into pixel offset, color accuracy, brightness and uniformity;
the specific inspection positions are four areas of upper left, lower left, upper right and lower right, and each area is used for detecting pixel offset, color accuracy, brightness and uniformity respectively.
5. The high ppi display detection eye-assist method of claim 4, wherein: the pixel offset is used for presenting a gap between a position of a pixel on a screen and a theoretical position of the pixel, and a calculation formula is as follows:
Px＝(Δx/D)xP；
where Px represents the percentage of pixel shift, Δx is the distance the pixel actually shifts, D is the display screen diagonal length, and P is the screen resolution;
the color accuracy is used for presenting whether the color displayed on the screen is matched with the true color, and the calculation formula is as follows:
ΔE＝[(ΔL)2+(Δa)2+(Δb)2]^0.5；
where Δl, Δa, and Δb are the differences between the color displayed on the screen and the true value of that color;
the brightness is used for presenting the brightness level of the screen display, and the calculation formula is as follows:
B＝(L/L0)x100％；
wherein B is brightness, L is brightness actually displayed on the screen, and L0 is a standard brightness value;
the uniformity is used for presenting whether the brightness and the color of different areas on the screen are equal or not, and the calculation formula is calculated as follows:
Δu＝[(u1-u2)2+(v1-v2)2]^0.5；
where u1 and v1 are measurements of a particular location on the screen and u2 and v2 are measurements of a reference location on the screen.
6. The high ppi display detection eye-assist method of claim 5, wherein: the pixel offset is required to be detected one by using an amplifying mirror, the pixel offset is calculated by comparing the difference between the actual pixel position and the theoretical pixel position, and the pixel offset is converted into a percentage value to be evaluated, wherein the pixel offset is within 5%;
the color accuracy is compared with colors displayed on an actual screen by using a color observation table or a standard color card tool, and a color difference value is calculated and evaluated, wherein the color difference value is within 3;
the brightness is measured by using a photometer, the difference between the maximum brightness and the minimum brightness is calculated, the uniformity of the brightness of the screen is evaluated, the difference of the brightness is within 10%, and the uniformity of the brightness is kept above 90%;
the uniformity is measured for brightness and color of different areas by using a sampling probe or photometer, and the contrast with the whole screen is calculated, and the contrast of brightness and color is maintained above 70%.
7. The high ppi display detection eye-assist method of claim 6, wherein: the fifth step specifically comprises the following steps;
a1, summarizing all recorded problems, and finishing problems and defects in terms of pixel offset, color accuracy, brightness and uniformity recorded previously for each specific inspection position;
a2, assigning weight values to the problems and the defects, assigning all the problems and the defects to different classifications, and assigning a weight value to each classification;
a3, carrying out weighted summation on the weight value of each classification to obtain the total weight value of all the problems and defects;
and A4, judging the overall detection result of the liquid crystal module according to the total weight value and giving a corresponding evaluation conclusion.
8. The high ppi display detection eye-assist method of claim 7, wherein: the A2 is characterized in that weight values are assigned to the problems and the defects, different weight values are assigned to different problems by using a range of 0-10, wherein 0 points represent no problems, and 10 points represent the most serious problems;
the A3 comprises the following calculation formula for calculating the total weight value:
W＝w1q1+w2q2+…+wn*qn；
wherein each set w and q represents the weight of a problem or defect and its number;
the step A4 includes comparing the total weight value with a predetermined evaluation standard, if the total weight value is smaller than 10, the liquid crystal module is good, the total weight value is between 10 and 20, and the total weight value is larger than 20, so that the whole evaluation of the liquid crystal module is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311689128.9A CN117687235A (en) | 2023-12-11 | 2023-12-11 | High ppi display detection human eye auxiliary method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311689128.9A CN117687235A (en) | 2023-12-11 | 2023-12-11 | High ppi display detection human eye auxiliary method |
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| CN117687235A true CN117687235A (en) | 2024-03-12 |
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| CN202311689128.9A Pending CN117687235A (en) | 2023-12-11 | 2023-12-11 | High ppi display detection human eye auxiliary method |
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