CN108956623B - Demura multiaxis automated inspection mechanism - Google Patents
Demura multiaxis automated inspection mechanism Download PDFInfo
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- CN108956623B CN108956623B CN201810735111.5A CN201810735111A CN108956623B CN 108956623 B CN108956623 B CN 108956623B CN 201810735111 A CN201810735111 A CN 201810735111A CN 108956623 B CN108956623 B CN 108956623B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 73
- 238000007689 inspection Methods 0.000 title claims description 3
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims description 38
- 230000006698 induction Effects 0.000 claims description 18
- 239000004973 liquid crystal related substance Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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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
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Abstract
The invention discloses a Demura multi-shaft full-automatic detection mechanism which comprises a rack and a CCD (charge coupled device) camera, wherein a transplanting module is arranged on the rack, the movable end of the transplanting module is connected with a connecting frame, and the CCD camera is connected below the connecting frame; and a first linear sliding table, a second linear sliding table, a swinging sliding table and a gear focusing mechanism which are coaxially arranged are arranged between the connecting frame and the CCD camera. Compared with the traditional Demura detection mechanism, the invention has simple structure and convenient use, can ensure that the CCD camera can displace along the X-axis, the Y-axis and the Z-axis and simultaneously rotate around the X-axis, the Y-axis and the Z-axis, simultaneously realizes full-automatic adjustment, and has a focal length adjustment mechanism, thereby avoiding inaccurate focusing and damage to the camera caused by overlarge adjustment amplitude of the CCD camera along the Z-axis.
Description
Technical Field
The invention relates to a Demura detection mechanism, belongs to the technical field of display panel detection, and particularly relates to a Demura multi-axis automatic detection mechanism.
Background
In recent years, with the rapid popularization of home televisions, consumers have also made higher and higher demands on the pictures of liquid crystal television display screens, so that the quality of the liquid crystal television display screens has also been higher and higher. The liquid crystal display television display screen panel has complex production process and high control difficulty, is easy to cause Mura phenomenon (uneven brightness) in the production process, and has bright spots or dark spots, namely, the regional blocky trace phenomenon caused by the difference of display brightness of a certain area of the panel, so that the quality grade of the panel is reduced. In order to eliminate the above Mura phenomenon, a Demura (panel luminance unevenness elimination) technique has been developed.
The Demura technique is a technique for eliminating the display Mura to make the brightness of the picture uniform. The basic principle of the Demura technology is that a panel displays a gray-scale picture, a capacitive coupling device (Charge Coupled Device, CCD) is used for shooting a screen, brightness values of all pixel points in the panel are obtained, then gray-scale values or voltages of the pixel points in a Mura area are adjusted, so that an excessively dark area becomes bright, and an excessively bright area becomes dark, and a uniform display effect is achieved. In the prior art, when the Demura technology is used for eliminating the Mura of the display, the display is generally carried out in a darkroom and is generally manually adjusted, so the defects of less degree of freedom, large limitation, easiness in causing detection errors and the like exist. A Mura compensation system and method for a display screen is disclosed in chinese patent specification CN107086021 a. The Mura compensation system of the display screen can comprise a darkroom, a camera horizontal/XY direction displacement adjustment shaft, a camera vertical direction adjustment shaft, a CCD camera, a fixed base station, a shockproof table and a data terminal. Wherein the camera horizontal/XY direction displacement adjustment axis may be used to adjust the horizontal displacement of the CCD camera, e.g., to move left or right, to adjust the CCD camera to capture image data of a target area of a display screen placed on a fixed base. The camera vertical direction adjustment axis may be used to adjust the vertical displacement of the CCD camera, e.g., move downward or upward, to adjust the vertical distance between the CCD camera and the display screen placed on the fixed base. The camera horizontal/XY direction displacement adjustment shaft, the camera vertical direction adjustment shaft, the CCD camera, the fixed base and the vibration-proof table may be all disposed in the darkroom, and the data terminal may be disposed outside the darkroom. The technical scheme has the following technical problems: firstly, the invention does not disclose a complete technical scheme of an automatic detection mechanism, only three degrees of freedom of a CCD camera can be known according to the description of the comparison document, and the driving of the CCD camera is not disclosed; secondly, if the position height of the CCD camera is adjusted by adopting the adjusting mechanism, focusing is inevitably inaccurate due to amplitude modulation, and meanwhile, the camera is possibly damaged; finally, the three degrees of freedom CCD camera cannot meet the required test accuracy of the Mura compensation system.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the Demura multi-axis automatic detection mechanism which has a simple structure and is convenient to operate, six-degree-of-freedom adjustment of a CCD camera can be realized, and the focusing precision of the CCD camera is ensured.
In order to solve the technical problems, the invention adopts the Demura multi-axis automatic detection mechanism, which comprises a rack and a CCD camera, wherein a transplanting module for driving the CCD camera to move along a vertical Z axis is arranged on the rack, the movable end of the transplanting module is connected with a connecting frame, and the CCD camera is connected below the connecting frame; a first linear sliding table, a second linear sliding table, a swinging sliding table and a gear focusing mechanism, wherein the first linear sliding table is coaxially arranged between the connecting frame and the CCD camera and used for driving the CCD camera to move along a horizontal X axis, the second linear sliding table is used for driving the CCD camera to move along a vertical Z axis, the swinging sliding table is used for driving the CCD camera to rotate around the horizontal X axis and the Z axis, and the gear focusing mechanism is used for adjusting the focal length of the CCD camera; the gear focusing mechanism comprises a base, a driving source, a driving gear and a driven gear; the base is connected with the swing sliding table, the CCD camera and the driving source are fixedly connected on the base, the output end of the driving source is fixedly connected with the driving gear, the driven gear is fixedly connected at the focusing position of the CCD camera, and the driving gear and the driven gear are meshed for transmission.
In a preferred embodiment of the present invention, a focusing limiting mechanism is further provided between the CCD camera and the gear focusing mechanism.
In a preferred embodiment of the invention, the focusing limiting mechanism comprises a photoelectric sensor fixedly connected to the lower end of the base and an induction ring coaxially arranged with the driving gear, wherein the induction ring comprises an induction part for limiting the cooperation of the photoelectric sensor and a connecting part for sleeving and connecting the output end of the driving source.
In a preferred embodiment of the invention, the connecting part is sleeve-shaped, the inner diameter of the sleeve-shaped connecting part corresponds to the outer diameter of the output end of the driving source, and the sleeve-shaped connecting part is provided with a plurality of threaded holes for fixing the induction ring along the radial direction of the connecting part.
In a preferred embodiment of the present invention, the number of the photosensors is two, and the two photosensors are arranged vertically up and down; the number of the induction rings is two, and an included angle exists between the induction parts on the two induction rings.
In a preferred embodiment of the invention, the drive source is cooperatively coupled to the base by a mounting guide.
In a preferred embodiment of the present invention, the installation guiding structure comprises a vertical installation guiding plate, a horizontal installation guiding plate and a U-shaped connecting plate, wherein the vertical installation guiding plate is vertically and fixedly connected to the upper end of the base, a waist-shaped hole which is used for connecting the horizontal installation guiding plate and is arranged along the Z-axis direction is formed in the vertical installation guiding plate, the horizontal installation guiding plate is fixedly connected with the vertical installation guiding plate through a bolt, a waist-shaped hole which is used for connecting the U-shaped connecting plate and is arranged along the Y-axis direction is formed in the horizontal installation guiding plate, the horizontal installation guiding plate is connected to the lower end of the horizontal installation guiding plate through a bolt, and the driving source is fixedly connected to the U-shaped connecting plate.
In a preferred embodiment of the invention, the end part of the U-shaped connecting plate is fixedly connected with a focusing limiting mechanism.
In a preferred embodiment of the invention, the movable end of the transplanting module is fixedly connected with the fixed end of the first linear sliding table, the movable end of the first linear sliding table is connected with the fixed end of the second linear sliding table, the movable end of the second linear sliding table is connected with the fixed end of the swinging sliding table, and the movable end of the swinging sliding table is connected with the gear focusing mechanism.
In a preferred embodiment of the invention, the movable end of the transplanting module is fixedly connected with the fixed end of the second linear sliding table, the movable end of the second linear sliding table is connected with the fixed end of the first linear sliding table, the movable end of the first linear sliding table is connected with the fixed end of the swinging sliding table, and the movable end of the swinging sliding table is connected with the gear focusing mechanism.
The beneficial effects of the invention are as follows: compared with the traditional Demura detection mechanism, the invention has simple structure and convenient use, can lead the CCD camera to displace along the X-axis and the Z-axis, simultaneously rotate around the X-axis and the Z-axis, simultaneously realize full-automatic adjustment, and has a focal length adjustment mechanism, thereby avoiding inaccurate focusing and damage to the camera caused by overlarge adjustment amplitude of the CCD camera along the Z-axis; furthermore, the full-automatic focusing precision and speed of the CCD camera are effectively improved through the transplanting module for primarily and coarsely adjusting the distance between the CCD camera and the liquid crystal panel to be measured, the second linear sliding table for primarily and finely adjusting the distance between the CCD camera and the liquid crystal panel to be measured and the gear focusing mechanism for secondarily and finely adjusting the distance between the CCD camera and the liquid crystal panel to be measured; according to the invention, the transplanting module, the linear sliding table and the swinging sliding table are arranged on the rack and are matched with the gear focusing mechanism, so that the CCD camera can move and rotate along the X-axis and Z-axis directions, a plurality of degrees of freedom are provided for the CCD camera, and the change of the spatial position and the pitch angle of the CCD camera in the detection process is facilitated; furthermore, the invention controls the focusing precision of the CCD camera through the pair of meshed external gears, thereby omitting a mechanism for driving the CCD camera to displace, which is arranged along the Z-axis direction, of the traditional Demura detection mechanism, reducing the volume and the quality of the Demura detection mechanism and improving the focusing precision of the CCD camera; furthermore, in order to prevent the internal parts of the camera from being damaged due to excessive adjustment of the focusing mechanism, a set of focusing limiting mechanism is arranged between the CCD camera and the gear focusing mechanism, and the focusing limiting mechanism comprises a photoelectric sensor and an induction ring, so that the rotation angle of the focusing mechanism can be effectively controlled; furthermore, in order to facilitate the reasonable selection of the focusing range according to different working conditions, the number of the photoelectric sensors and the sensing rings in the focusing limiting mechanism is 2, the sensing rings are sleeved on the output end of the driving source, and the included angle between the sensing parts on the two sensing rings is adjustable, so that the control of the focal length adjusting range of the CCD camera is realized; furthermore, the linear sliding table, the swinging sliding table and the first linear sliding table are all existing products, are directly purchased for assembly and use, and are not required to be designed independently; furthermore, the invention facilitates the adjustment and use of the installation position of the driving gear by arranging the installation guide structure between the driving source and the base.
Drawings
FIG. 1 is a schematic diagram of a Demura multi-axis automatic detection mechanism according to an embodiment of the invention;
fig. 2 is a schematic diagram of a transplanting module structure of a Demura multi-axis automatic detection mechanism according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a connection frame of a Demura multi-axis automatic detection mechanism and devices mounted on the connection frame according to an embodiment of the invention;
FIG. 4 is an isometric view of a focusing and limiting mechanism in a Demura multi-axis automatic detection mechanism according to an embodiment of the invention;
FIG. 5 is a front view of a focusing and limiting mechanism in a Demura multi-axis automatic detection mechanism according to an embodiment of the invention;
in the figure: 1-a frame; a 2-CCD camera; 3-transplanting module; 4-connecting frames; 5-a first linear sliding table; 6-swinging a sliding table; 7-a gear focusing mechanism; 8-a second linear sliding table; 9-focusing limiting mechanism; 10-vertically mounting a guide plate; 11-horizontally mounting guide plates; a 12-U-shaped connecting plate; 7.1-a base; 7.2-a drive source; 7.3-a drive gear; 7.4-driven gears; 9.1-a photosensor; a 2-induction loop; 9.2-1-sensing part; a 2-2-linkage; a-the invention; b-product positioning jig; c-darkroom.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The Demura multi-axis automatic detection mechanism shown in the attached drawings 1-2 of the specification can be known to be used in a darkroom C and is required to be matched with a product positioning jig B with an adjustable position, the detection mechanism comprises a frame 1 and a CCD camera 2, a transplanting module 3 for driving the CCD camera 2 to move along a vertical Z axis is arranged on the frame 1, the transplanting module 3 belongs to the prior art, a connecting frame 4 is connected to the movable end of the transplanting module 3, and the CCD camera 2 is connected to the lower part of the connecting frame 4; a first linear sliding table 5 which is coaxially arranged and used for driving the CCD camera 2 to move along a horizontal X axis, a second linear sliding table 8 which is used for driving the CCD camera 2 to move along a vertical Z axis, a swinging sliding table 6 which is used for driving the CCD camera 2 to rotate around the horizontal X axis and the Z axis and a gear focusing mechanism 7 which is used for adjusting the focal length of the CCD camera 2 are arranged between the connecting frame 4 and the CCD camera 2, and the positions of the first linear sliding table 5 and the second linear sliding table 8 can be interchanged; the gear focusing mechanism 7 comprises a base 7.1, a driving source 7.2, a driving gear 7.3 and a driven gear 7.4; the base 7.1 is fixedly connected to the lower end of the swing sliding table 6, the base 7.1 is fixedly connected with the CCD camera 2 and the driving source 7.2, the output end of the driving source 7.2 is fixedly connected with the driving gear 7.3, the focusing part of the CCD camera 2 is fixedly connected with the driven gear 7.4, and the driving gear 7.3 and the driven gear 7.4 are meshed for transmission. It should be noted that the first linear slide 5, the swing slide 6, and the second linear slide 8 described above are all of the prior art.
In order to prevent damage to internal parts of a camera caused by overlarge angle adjustment of a CCD camera focusing mechanism, a focusing limiting mechanism 9 is further arranged between the CCD camera 2 and the gear focusing mechanism 7, the focusing limiting mechanism 9 comprises a photoelectric sensor 9.1 fixedly connected to the lower end of a base 7.1 and an induction ring 9.2 coaxially arranged with a driving gear 7.3, the induction ring 9.2 comprises an induction part 9.2-1 matched with the photoelectric sensor 9.1 and a connecting part 9.2-2 sleeved with the output end of a driving source 7.2, the connecting part 9.2-2 is of a sleeve-shaped structure, and a through hole radially arranged along the connecting part is formed in the middle of the connecting part for fixing the output end of the driving source 7.2; the sensing portion 9.2-1 is engaged with the photosensor 9.1, so that the focusing range of the gear focusing mechanism 7 can be preset. Further, in order to adapt to various working conditions, the invention can quickly and conveniently adjust the focusing range of the gear focusing mechanism 7, and the two photoelectric sensors 9.1 are arranged vertically along the vertical direction; the number of the sensing rings 9.2 is two, and an included angle exists between the sensing parts 9.2-1 on the two sensing rings 9.2, so that the focusing range of the gear focusing mechanism 7 is enlarged.
Further, in order to facilitate the installation and debugging of the driving gear 7.3 of the present invention, the driving source 7.2 of the present invention is cooperatively connected with the base 7.1 through an installation guiding structure; the installation guide structure comprises a vertical installation guide plate 10, a horizontal installation guide plate 11 and a U-shaped connecting plate 12, wherein the vertical installation guide plate 10 is vertically and fixedly connected to the upper end of the base 7.1, a waist-shaped hole which is used for connecting the horizontal installation guide plate 11 and is arranged along the Z-axis direction is formed in the vertical installation guide plate 10, the horizontal installation guide plate 11 is fixedly connected with the vertical installation guide plate 10 through a bolt, a waist-shaped hole which is used for connecting the U-shaped connecting plate 12 and is arranged along the Y-axis direction is formed in the horizontal installation guide plate 11, the horizontal installation guide plate 11 is connected to the lower end of the horizontal installation guide plate 11 through a bolt, and a driving source 7.2 is fixedly connected on the U-shaped connecting plate 12; the end part of the U-shaped connecting plate 12 is fixedly connected with a focusing limiting mechanism 9.
The action mode of the invention is as follows:
the transplanting module 3 is fixed on the frame 1, and the transplanting module 3 is used for driving the first linear sliding table 5, the second linear sliding table 8, the swinging sliding table 10 and the CCD camera 2 to generate a position for coarsely adjusting the CCD camera 2 in the Z-axis direction; the first linear sliding table 5 is used for driving the CCD camera 2 to generate displacement in the X-axis direction; the second linear sliding table 8 is used for driving the CCD camera 2 to generate Z-axis direction displacement to finely adjust the position of the CCD camera 2 once; the CCD camera 2 can rotate around X, Y shafts respectively under the action of the swinging sliding table 6; the driving source 7.2 acts on the external gear mechanism to drive the CCD camera 2 to move up and down, and the focal length of the CCD camera 2 is finely adjusted for the second time.
In sum, the mechanism can enable the CCD camera 2 to generate displacement along the X-axis direction and the Z-axis direction, and enable the CCD camera 2 to rotate around the X-axis and the Z-axis, compared with the traditional Demura detection mechanism, the mechanism has powerful function, is fully automatically adjusted, and is provided with a focal length adjusting limiting device, so that the excessive adjustment amplitude and the damage to the camera are avoided.
It should be understood that the foregoing is only illustrative of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. The utility model provides a Demura multiaxis automated inspection mechanism, includes frame (1) and CCD camera (2), its characterized in that: a transplanting module (3) for driving the CCD camera (2) to move along a vertical Z axis and realizing coarse adjustment of the position of the CCD camera (2) is arranged on the frame (1), a connecting frame (4) is connected to the movable end of the transplanting module (3), and the CCD camera (2) is connected to the lower part of the connecting frame (4); a first linear sliding table (5) which is coaxially arranged and used for driving the CCD camera (2) to move along a horizontal X axis, a second linear sliding table (8) which is used for driving the CCD camera (2) to move along a vertical Z axis and used for realizing primary fine adjustment of the position of the CCD camera (2), a swinging sliding table (6) which is used for driving the CCD camera (2) to rotate around the horizontal X axis and the Z axis, and a gear focusing mechanism (7) which is used for adjusting the focal length of the CCD camera (2) so as to realize secondary fine adjustment of the distance of the CCD camera (2) relative to a liquid crystal panel to be measured are arranged between the connecting frame (4) and the CCD camera (2); the gear focusing mechanism (7) comprises a base (7.1), a driving source (7.2), a driving gear (7.3) and a driven gear (7.4); the base (7.1) is connected with the swing sliding table (6), the CCD camera (2) and the driving source (7.2) are fixedly connected to the base (7.1), the output end of the driving source (7.2) is fixedly connected with the driving gear (7.3), the driven gear (7.4) is fixedly connected to the focusing part of the CCD camera (2), and the driving gear (7.3) and the driven gear (7.4) are in meshed transmission; a focusing limiting mechanism (9) is further arranged between the CCD camera (2) and the gear focusing mechanism (7); the focusing limiting mechanism (9) comprises a photoelectric sensor (9.1) fixedly connected to the lower end of the base (7.1) and an induction ring (9.2) coaxially arranged with the driving gear (7.3), the induction ring (9.2) comprises an induction part (9.2-1) used for limiting the cooperation of the photoelectric sensor (9.1) and a connecting part (9.2-2) used for sleeving and connecting the output end of the driving source (7.2), the connecting part (9.2-2) is sleeve-shaped, the inner diameter of the sleeve-shaped connecting part (9.2-2) corresponds to the outer diameter of the output end of the driving source (7.2), and a plurality of threaded holes used for fixing the induction ring (9.2) are formed in the radial arrangement of the sleeve-shaped connecting part (9.2-2); the number of the photoelectric sensors (9.1) is two, and the two photoelectric sensors (9.1) are arranged up and down along the vertical direction; the number of the induction rings (9.2) is two, and an included angle exists between the induction parts (9.2-1) on the two induction rings (9.2); the included angle between the sensing parts on the two sensing rings is adjustable, so that the control of the focal length adjusting range of the CCD camera is realized.
2. The Demura multi-axis automatic detection mechanism according to claim 1, wherein: the driving source (7.2) is connected with the base (7.1) in a matched mode through the installation guide structure.
3. The Demura multi-axis automatic detection mechanism according to claim 2, wherein: the installation guide structure comprises a vertical installation guide plate (10), a horizontal installation guide plate (11) and a U-shaped connecting plate (12), wherein the vertical installation guide plate (10) is vertically and fixedly connected to the upper end of the base (7.1), a waist-shaped hole which is used for connecting the horizontal installation guide plate (11) and is arranged along the Z-axis direction is formed in the vertical installation guide plate (10), the horizontal installation guide plate (11) is fixedly connected with the vertical installation guide plate (10) through a bolt, a waist-shaped hole which is used for connecting the U-shaped connecting plate (12) and is arranged along the Y-axis direction is formed in the horizontal installation guide plate (11), the horizontal installation guide plate (11) is connected to the lower end of the horizontal installation guide plate (11) through a bolt, and the driving source (7.2) is fixedly connected to the U-shaped connecting plate (12).
4. A Demura multi-axis automatic detection mechanism according to claim 3, wherein: the end part of the U-shaped connecting plate (12) is fixedly connected with a focusing limiting mechanism (9).
5. The Demura multi-axis automatic detection mechanism according to claim 1, wherein: the movable end of the transplanting module (3) is fixedly connected with the fixed end of the first linear sliding table (5), the movable end of the first linear sliding table (5) is connected with the fixed end of the second linear sliding table (8), the movable end of the second linear sliding table (8) is connected with the fixed end of the swinging sliding table (6), and the movable end of the swinging sliding table (6) is connected with the gear focusing mechanism (7).
6. The Demura multi-axis automatic detection mechanism according to claim 1, wherein: the movable end of the transplanting module (3) is fixedly connected with the fixed end of the second linear sliding table (8), the movable end of the second linear sliding table (8) is connected with the fixed end of the first linear sliding table (5), the movable end of the first linear sliding table (5) is connected with the fixed end of the swinging sliding table (6), and the movable end of the swinging sliding table (6) is connected with the gear focusing mechanism (7).
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| CN201810735111.5A CN108956623B (en) | 2018-07-06 | 2018-07-06 | Demura multiaxis automated inspection mechanism |
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| CN201810735111.5A CN108956623B (en) | 2018-07-06 | 2018-07-06 | Demura multiaxis automated inspection mechanism |
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| CN108956623B true CN108956623B (en) | 2024-02-27 |
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| CN112344984B (en) * | 2020-09-27 | 2022-11-29 | 东风设备制造有限公司 | Multi-station full-automatic disc gear detection device |
| CN113176074B (en) * | 2021-04-20 | 2022-09-27 | 武汉精立电子技术有限公司 | Non-contact Demura-Gamma-Flicker three-in-one measuring system and method |
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