CN114112321A - A counterpoint system for detecting cell-phone screen hole district - Google Patents
A counterpoint system for detecting cell-phone screen hole district Download PDFInfo
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- CN114112321A CN114112321A CN202111175392.1A CN202111175392A CN114112321A CN 114112321 A CN114112321 A CN 114112321A CN 202111175392 A CN202111175392 A CN 202111175392A CN 114112321 A CN114112321 A CN 114112321A
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- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000003384 imaging method Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N2021/9513—Liquid crystal panels
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Abstract
The invention relates to an alignment system for detecting a mobile phone screen hole area, which comprises a first camera component, a second camera component, a mobile module and a coaxial point light source, wherein the first camera component is arranged on the mobile module; the target surface of the first camera assembly faces the area to be detected, and the first camera assembly is installed on the first installation plate; the target surface of the second camera assembly faces the to-be-detected area, and the second camera assembly is arranged on a second mounting plate; the first mounting plate and the second mounting plate are both arranged on the moving module, and the moving module drives the first mounting plate and the second mounting plate to approach or move away from each other; coaxial point light sources are mounted on the first camera assembly and the second camera assembly. The mobile phone screen alignment method can be used for carrying out high-precision alignment on the mobile phone screen to be detected, so that subsequent detection is facilitated.
Description
Technical Field
The invention relates to the field of display panel detection, in particular to an alignment system for detecting a mobile phone screen hole area.
Background
The mobile phone screen is used for displaying images and colors and is mainly divided into a TFT, a TFD, a UFB, a STN and an OLED.
The 2.5D screen refers to glass covered on a display screen and subjected to a special treatment process, the edge of the common pure flat glass is made into an arc shape, but the display layer in the screen is still pure flat. After a mobile phone manufacturer adopts a 2.5D screen, the height of a middle frame of a mobile phone body is shortened, the screen of the mobile phone is protruded outwards, and the visual effect that water overflows is achieved. Since the introduction of the concept of 2.5D glass into cell phone screens, previously pure flat cell phone screens were grouped into the 2D screen line. The glass is a pure flat structure glass with all points on the same horizontal plane, and is called a 2D screen in a general mode. The 2.5D and 3D screens are completely different concepts in the technical level, and the 3D curved screen has higher requirements on the radian of glass. Moreover, the 3D screen is not only an arc screen for the outer glass, but also an inner display panel needs a flexible material and support of more transistors.
The appearance of the hole digging screen is a great pursuit for high screen ratio while keeping a front camera and a receiver, and is a search for 100 percent of full screen in the long run. The LCD screen adopts backlight display, and has a three-layer structure: a BLU backlight layer, an LTPS liquid crystal layer, and a glass panel. The LCD can only be supported to a 2.5D glass cover plate due to its inherent structure.
Because the OLED panel has the self-luminous characteristic, a backlight module and a color filter are not needed, and the liquid crystal filling process of a common LCD panel is also not needed, three processes are reduced in the manufacturing process compared with the LCD adopting liquid crystal to emit light, and later-stage punching is easier. At present, the OLED display panel product is developed rapidly, has become the mainstream display product of consumer electronics such as cell-phones, tablet computers, and has the advantages of low power consumption, wide color gamut, high contrast, being lighter and thinner, flexible and bendable, and can freely carry 2D, 2.5D or 3D glass cover plate for use, compared with the LCD display screen. However, in the production process of the OLED panel, due to the problem of the bonding section process, micro cracks are easily generated at the opening position of the flexible panel, the cracks cause the failure of the panel package, and under the invasion of air and water vapor, waste defects such as gradually increased black lumps and the like will occur in the display area with crack defects near the holes.
Therefore, those skilled in the art are dedicated to develop an alignment system for detecting a mobile phone screen hole area, so as to perform high-precision alignment on a mobile phone screen to be detected, thereby facilitating subsequent detection.
Disclosure of Invention
The invention aims to solve the technical problem of providing an alignment system for detecting a mobile phone screen hole area, which is used for carrying out high-precision alignment on a mobile phone screen to be detected so as to facilitate subsequent detection.
The technical scheme for solving the technical problems is as follows: a contraposition system for detecting a mobile phone screen hole area comprises a first camera component, a second camera component, a mobile module and a coaxial point light source;
the target surface of the first camera assembly faces the area to be detected, and the first camera assembly is installed on the first installation plate;
the target surface of the second camera assembly faces the to-be-detected area, and the second camera assembly is arranged on a second mounting plate;
the first mounting plate and the second mounting plate are both arranged on the moving module, and the moving module drives the first mounting plate and the second mounting plate to approach or move away from each other;
coaxial point light sources are mounted on the first camera assembly and the second camera assembly.
The invention has the beneficial effects that: the coaxial point light source irradiates the mobile phone screen on the area to be detected, and the first camera component and the second camera component capture all common features on the mobile phone screen, including the circular hole, the straight edge and the outer contour of the product for posture positioning, so that subsequent detection is facilitated; simultaneously first camera subassembly and second camera subassembly are installed respectively on first mounting panel and second mounting panel, can carry out adaptability with camera subassembly according to the product of difference and adjust, reinforcing wildcard nature.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, still include the third camera subassembly, the third camera subassembly is close to the second camera subassembly, and the third camera subassembly is installed on the second mounting panel.
The beneficial effect of adopting above-mentioned further scheme is that increasing a plurality of camera subassemblies, can compatible 2.5D or 3D screen.
Further, first camera subassembly with between the first mounting panel second camera subassembly with between the second mounting panel third camera subassembly with all install accurate displacement platform between the second mounting panel, accurate displacement platform drives each camera subassembly and is close to or keeps away from and wait to examine the district.
The beneficial effect who adopts above-mentioned further scheme is that accurate displacement platform is used for adjusting the camera subassembly and waits to examine the distance between the district, and each camera subassembly all is provided with independent adjustment mechanism that focuses, not only can adapt to different cell-phone screens, and detects precision and counterpoint precision and all be higher.
Further, the moving module comprises a first sliding part and a second sliding part, the first mounting plate is mounted on the first sliding part, and the second mounting plate is mounted on the second sliding part;
the first sliding piece and the second sliding piece are clamped on the guide piece.
Adopt above-mentioned further scheme's beneficial effect be that the guide part accuracy is to first slider and the accurate direction of second slider, prevents to appear the displacement deviation among the accommodation process, influences the detection precision.
Furthermore, the mobile module also comprises a transmission screw rod, a first screw rod bearing and a second screw rod bearing which are matched with the transmission screw rod are arranged on the transmission screw rod, and the screw teeth of the first screw rod bearing are opposite to the screw teeth of the second screw rod bearing;
the first lead screw bearing is connected with the first slider, and the second lead screw bearing is connected with the second slider;
and a power device is arranged at the end part of the transmission screw rod and rotates to drive the first sliding part and the second sliding part to be close to or far away from each other.
The beneficial effect who adopts above-mentioned further scheme is that power device rotates and drives the transmission lead screw and rotate, and the transmission lead screw rotates and then drives first slider and second slider and remove, because the thread of first lead screw bearing and second lead screw bearing is opposite, therefore the first slip of transmission lead screw transmission in-process and second slider keep away from each other or are close to each other, the bidirectional adjustment of being convenient for, the regulation precision is high.
Further, a module mounting bottom plate is mounted on the side wall of the mobile module, and a first drag chain fixing plate and a second drag chain fixing plate are mounted at two ends of the module mounting bottom plate respectively;
a first connecting plate is arranged on the first sliding part, and a first dust-free tow chain is arranged between the first connecting plate and the first tow chain fixing plate;
and a second connecting plate is arranged on the second sliding part, and a second dust-free tow chain is arranged between the second connecting plate and the second tow chain fixing plate.
The beneficial effect who adopts above-mentioned further scheme is that first slip and second slider remove and drive first dustless tow chain and the removal of second dustless tow chain respectively, is provided with multiple data line in first dustless tow chain and the dustless tow chain of second.
Further, first camera subassembly, second camera subassembly and third camera subassembly all includes camera and imaging lens, imaging lens target surface orientation is waited the district, coaxial pointolite is installed on the imaging lens.
Adopt above-mentioned further scheme's beneficial effect be that the camera subassembly includes camera and imaging lens, improves the imaging precision, and then improves and detect the precision.
Further, the second mounting panel with install the backup pad between the second slider, the backup pad with second slider mutually perpendicular, the backup pad with still be provided with the reinforcing plate between the second slider.
Adopt the beneficial effect of above-mentioned further scheme to be that the reinforcing plate strengthens the joint strength between backup pad and the second slider.
Further, the power device is a stepping motor or a servo motor.
The beneficial effect of adopting above-mentioned further scheme is that step motor or servo motor accurate control transmission lead screw's rotation volume, and then the accurate distance of controlling first sliding plate and second sliding plate removal.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a mobile module according to an embodiment of the invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a first camera assembly; 2. a second camera assembly; 3. a third camera assembly; 4. a first mounting plate; 5. a second mounting plate; 6. a precision displacement stage; 7. a first slider; 8. a second slider; 9. a power plant; 10. a guide member; 11. a module mounting base plate; 12. a first drag chain fixing plate; 13. a second tow chain fixing plate; 14. a first connecting plate; 15. a second connecting plate; 16. a first dustless tow chain; 17. a second dustless tow chain; 18. a support plate; 19. a reinforcing plate; 20. and a moving module.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, fig. 2, and fig. 3, an alignment system for detecting a mobile phone screen hole area includes a first camera assembly 1, a second camera assembly 2, a mobile module 20, and a coaxial point light source. The 1 target surface orientation of first camera subassembly is waited the district, cell-phone screen detection area promptly. The first camera component 1 is arranged on the first mounting plate 4, the target surface of the second camera component 2 faces the area to be detected, the second camera component 2 is arranged on the second mounting plate 5, the first mounting plate 4 and the second mounting plate 5 are both arranged on the moving module 20, and the moving module 20 drives the first mounting plate 4 and the second mounting plate 5 to be close to or far away from each other; coaxial point light sources are mounted on the first camera assembly 1 and the second camera assembly 2.
According to the invention, the coaxial point light source irradiates on the mobile phone screen on the area to be detected, and the first camera component and the second camera component capture all common features on the mobile phone screen, including the circular hole, the straight edge and the outer contour of the product for posture positioning, so that subsequent detection is facilitated; simultaneously first camera subassembly and second camera subassembly are installed respectively on first mounting panel and second mounting panel, can carry out adaptability with camera subassembly according to the product of difference and adjust, reinforcing wildcard nature.
The invention also includes a third camera assembly 3, the third camera assembly 3 being adjacent the second camera assembly 2, and the third camera assembly 3 being mounted on a second mounting plate 5. First camera subassembly 1, second camera subassembly 2 and third camera subassembly 3 all adopt the same part to constitute, specifically include camera and imaging lens, and the district is examined to imaging lens target surface orientation, and coaxial pointolite is installed on imaging lens, and in the testing process, the light irradiation of coaxial pointolite is on the cell-phone screen, and imaging lens catches the characteristic on the cell-phone screen to carry out the gesture location.
The moving module 20 comprises a first sliding part 7 and a second sliding part 8, the first mounting plate 4 is mounted on the first sliding part 7, the second mounting plate 5 is mounted on the second sliding part 8, and the first sliding part 7 and the second sliding part 8 are clamped on the guide part 10. The guide 10 is installed at the removal module 20 lateral wall, and the guide 10 accuracy is to first slider 7 and the accurate direction of second slider 8, prevents to appear the displacement deviation among the accommodation process, influences the detection precision. A supporting plate 18 is arranged between the second mounting plate 5 and the second sliding part 8, the supporting plate 18 is perpendicular to the second sliding part 8, a reinforcing plate 19 is further arranged between the supporting plate 18 and the second sliding part 8, and the reinforcing plate 19 reinforces the connection strength between the supporting plate 18 and the second sliding part 8 to prevent the supporting plate from being broken or falling off.
The moving module 20 further comprises a transmission screw rod, a first screw rod bearing and a second screw rod bearing which are matched with the transmission screw rod are installed on the transmission screw rod, the thread of the first screw rod bearing is opposite to the thread of the second screw rod bearing, the first screw rod bearing is connected with a first sliding piece 7, and the second screw rod bearing is connected with a second sliding piece 8. The end part of the transmission screw rod is provided with a power device 9, the transmission screw rod is connected with the power device 9 through a coupler, and in the embodiment, the power device 9 is a stepping motor or a servo motor. The power device 9 rotates to drive the first sliding part 7 and the second sliding part 8 to be close to or far away from each other, the power device 9 adopts a servo motor or a stepping motor, the number of rotation turns of the power device 9 can be accurately controlled, and then the moving distance of the first sliding part 7 and the second sliding part 8 is accurately controlled.
In some embodiments, the moving module 20 comprises two sets of adjusting mechanisms, corresponding to the first slider 7 and the second slider 8, respectively. The camera component comprises a first stepping motor or a servo motor, wherein the first stepping motor or the servo motor is connected with a first lead screw, a first lead screw bearing matched with the first lead screw is installed on the first lead screw, the first lead screw bearing is connected with a first sliding piece 7, and the first stepping motor or the servo motor rotates to drive the first sliding piece 7 to move, so that the first camera component 1 is subjected to horizontal displacement adjustment. Similarly, the second stepping motor or the servo motor is connected with a second lead screw, a second lead screw bearing matched with the second lead screw is installed on the second lead screw, the second lead screw bearing is connected with a second sliding part 8, and the first stepping motor or the servo motor rotates to drive the second sliding part 8 to move, so that the second camera component 2 and the third camera component 3 are horizontally displaced and adjusted.
Remove module mounting plate 11 is installed to module 20 lateral wall, and first tow chain fixed plate 12 and second tow chain fixed plate 13 are installed respectively to module mounting plate 11 both ends, install first connecting plate 14 on the first slider 7, install first dustless tow chain 16 between first connecting plate 14 and the first tow chain fixed plate 12, install second connecting plate 15 on the second slider 8, install dustless tow chain 17 of second between second connecting plate 15 and the second tow chain fixed plate 13. Various data line transmission lines and power lines are arranged in the first dust-free tow chain 16 and the second dust-free tow chain 17.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A counterpoint system for detecting cell-phone screen hole region which characterized in that: the device comprises a first camera component (1), a second camera component (2), a moving module (20) and a coaxial point light source;
the target surface of the first camera assembly (1) faces the area to be detected, and the first camera assembly (1) is installed on a first installation plate (4);
the target surface of the second camera assembly (2) faces the area to be detected, and the second camera assembly (2) is installed on a second installation plate (5);
the first mounting plate (4) and the second mounting plate (5) are arranged on the moving module (20), and the moving module (20) drives the first mounting plate (4) and the second mounting plate (5) to approach or separate from each other;
coaxial point light sources are mounted on the first camera component (1) and the second camera component (2).
2. The alignment system for detecting a mobile phone screen hole area according to claim 1, wherein: further comprising a third camera assembly (3), the third camera assembly (3) being proximate to the second camera assembly (2), and the third camera assembly (3) being mounted on the second mounting plate (5).
3. The alignment system for detecting a mobile phone screen hole area according to claim 2, wherein: first camera subassembly (1) with between first mounting panel (4) second camera subassembly (2) with between second mounting panel (5) third camera subassembly (3) with all install accurate displacement platform (6) between second mounting panel (5), accurate displacement platform (6) drive each camera subassembly and are close to or keep away from waiting to examine the district.
4. The alignment system for detecting a mobile phone screen hole area according to any one of claims 1 to 3, wherein: the moving module (20) comprises a first slider (7) and a second slider (8), the first mounting plate (4) is mounted on the first slider (7), and the second mounting plate (5) is mounted on the second slider (8);
the first sliding part (7) and the second sliding part (8) are clamped on a guide part (10).
5. The alignment system for detecting the screen hole area of the mobile phone as claimed in claim 4, wherein: the moving module (20) further comprises a transmission screw rod, a first screw rod bearing and a second screw rod bearing which are matched with the transmission screw rod are installed on the transmission screw rod, and the threads of the first screw rod bearing are opposite to those of the second screw rod bearing;
the first screw shaft bearing is connected with the first slider (7), and the second screw shaft bearing is connected with the second slider (8);
and a power device (9) is arranged at the end part of the transmission screw rod, and the power device (9) rotates to drive the first sliding part (7) and the second sliding part (8) to be close to or far away from each other.
6. The alignment system for detecting the screen hole area of the mobile phone as claimed in claim 5, wherein: a module mounting bottom plate (11) is mounted on the side wall of the mobile module (20), and a first drag chain fixing plate (12) and a second drag chain fixing plate (13) are mounted at two ends of the module mounting bottom plate (11) respectively;
a first connecting plate (14) is mounted on the first sliding part (7), and a first dust-free drag chain (16) is mounted between the first connecting plate (14) and the first drag chain fixing plate (12);
and a second connecting plate (15) is arranged on the second sliding part (8), and a second dust-free tow chain (17) is arranged between the second connecting plate (15) and the second tow chain fixing plate (13).
7. The alignment system for detecting a mobile phone screen hole area according to claim 3, wherein: first camera subassembly (1), second camera subassembly (2) and third camera subassembly (3) all include camera and imaging lens, the district is waited to examine to imaging lens target surface orientation, coaxial pointolite is installed on the imaging lens.
8. The alignment system for detecting the screen hole area of the mobile phone as claimed in claim 4, wherein: a supporting plate (18) is installed between the second installing plate (5) and the second sliding piece (8), the supporting plate (18) is perpendicular to the second sliding piece (8), and a reinforcing plate (19) is further arranged between the supporting plate (18) and the second sliding piece (8).
9. The alignment system for detecting the screen hole area of the mobile phone as claimed in claim 5, wherein: the power device (9) is a stepping motor or a servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111175392.1A CN114112321A (en) | 2021-10-09 | 2021-10-09 | A counterpoint system for detecting cell-phone screen hole district |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111175392.1A CN114112321A (en) | 2021-10-09 | 2021-10-09 | A counterpoint system for detecting cell-phone screen hole district |
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| CN114112321A true CN114112321A (en) | 2022-03-01 |
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| CN202111175392.1A Pending CN114112321A (en) | 2021-10-09 | 2021-10-09 | A counterpoint system for detecting cell-phone screen hole district |
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| CN213544420U (en) * | 2020-11-18 | 2021-06-25 | 深圳市凯南整流子有限公司 | Appearance detection device |
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