CN113176280B - Liquid crystal panel layering detection device and method - Google Patents
Liquid crystal panel layering detection device and method Download PDFInfo
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- CN113176280B CN113176280B CN202110391767.1A CN202110391767A CN113176280B CN 113176280 B CN113176280 B CN 113176280B CN 202110391767 A CN202110391767 A CN 202110391767A CN 113176280 B CN113176280 B CN 113176280B
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- 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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- 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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- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8854—Grading and classifying of flaws
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- 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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8854—Grading and classifying of flaws
- G01N2021/8861—Determining coordinates of flaws
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- 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 utility model provides a liquid crystal display panel layered detection device and a method, wherein the device comprises: the device comprises a base, a movable platform deck, a natural light source camera assembly, a first ultraviolet light source camera assembly, a second ultraviolet light source camera assembly, an upper light source assembly and a backlight source assembly, wherein the movable platform deck adopts an air floating platform, the movable platform deck is arranged above the base, the natural light source camera assembly, the upper light source assembly and the first ultraviolet light source camera assembly are all located on one side of the movable platform deck, the first ultraviolet light source camera assembly and the second ultraviolet light source camera assembly are symmetrically arranged by taking a liquid crystal panel as an axis, and the second ultraviolet light source camera assembly and the backlight source assembly are all located on the other side of the liquid crystal panel; the upper light source assembly comprises a first natural light source assembly and a first ultraviolet light source assembly, and the backlight source assembly comprises a second natural light source assembly and a second ultraviolet light source assembly. The utility model can automatically distinguish the defects on the surface of the liquid crystal panel and the defects in the liquid crystal panel and improve the detection efficiency.
Description
Technical Field
The utility model relates to the technical field of liquid crystal panel layering detection equipment, in particular to liquid crystal panel layering detection equipment and a liquid crystal panel layering detection method.
Background
A typical lcd (liquid Crystal display) panel includes, from top to bottom, TP (touch panel) glass, an upper polarizer, a color filter, a liquid Crystal layer, a TFT (Thin Film Transistor) substrate, a lower polarizer, and a backlight source. With the development of LCD technology, it is fast becoming the leading role of display market with the characteristics of high resolution, small volume, light weight, no radiation, flat board, low power consumption, etc., and LCDs are ubiquitous in many fields, from mobile phones to portable game machines, from manual operation platforms of industrial equipment to bank self-service equipment atm (automatic Teller machine), etc. Therefore, quality inspection of the LCD panel becomes particularly important.
Automatic optical inspection is a measurement means widely used in the liquid crystal industry, and automatic optical inspection equipment is inspection equipment widely used in the liquid crystal industry. The liquid crystal panel is relatively complex in process and composed of a plurality of layers, and the automatic optical detection equipment in the prior art cannot effectively distinguish whether the defects are positioned inside or outside the panel. The liquid crystal panel is composed of cover glass and a plurality of thin films, and defects caused by foreign matters are mixed in the liquid crystal panel in the processing process, and the defects can cause defective products. Some defects (such as dust, dirt and the like) outside the liquid crystal panel can be removed through cleaning, and the quality is not influenced. The automatic detection device in the prior art cannot realize the real physical layer of the detected defect and the surface dust which is not filtered when the defect is detected, and the final detection effect is greatly influenced. Therefore, it is urgently required to develop an inspection apparatus for defining a defect accurate layer to solve the above problems.
Disclosure of Invention
In order to solve the defects, the utility model provides the liquid crystal panel layered detection equipment and the liquid crystal panel layered detection method, and the equipment can automatically distinguish the defects on the surface of the liquid crystal panel and the defects inside the liquid crystal panel, so that the detection efficiency is improved.
In a first aspect, the present invention provides a liquid crystal panel layer detection apparatus, including: the device comprises a base, a movable platform deck, a natural light source camera component, a first ultraviolet light source camera component, a second ultraviolet light source camera component, an upper light source component and a backlight source component, wherein the movable platform deck adopts an air floating platform, the movable platform deck is arranged above the base, the natural light source camera component, the upper light source component and the first ultraviolet light source camera component are all positioned on one side of the movable platform deck, the second ultraviolet light source camera component and the backlight source component are all positioned on the other side of the movable platform deck, and the first ultraviolet light source camera component and the second ultraviolet light source camera component are symmetrically arranged by taking the movable platform deck as an axis; the upper light source assembly comprises a first natural light source assembly and a first ultraviolet light source assembly, the first natural light source assembly is located below the natural light source camera assembly, the first ultraviolet light source assembly is located below the first ultraviolet light source camera assembly, and the backlight source assembly comprises a second natural light source assembly and a second ultraviolet light source assembly, the second natural light source assembly is located on the other side, opposite to the first natural light source assembly, of the movable carrying platform, and the second ultraviolet light source assembly is located between the second ultraviolet light source camera assembly and the movable carrying platform.
In an embodiment of the present invention, a linear module is disposed on one side above the base, a linear guide rail parallel to the linear module is disposed on the other side above the base, the bottom of the mobile carrier is connected to the linear module and the linear guide rail through a slider, respectively, and one end of the linear module is connected to the driving mechanism.
In one embodiment of the present invention, the mobile carrier includes: a table body; the clamp is arranged on the top surface of the table body, and a through groove is formed in the center of the clamp in a concave mode; the gas circuit bottom plate is arranged around the bottom of the through groove, a bearing edge is formed by protruding the inner circumference of the gas circuit bottom plate, and a bidirectional gas hole which longitudinally extends from the bottom edge of the gas circuit bottom plate and is communicated with the through groove is arranged on the bearing edge; the left air channel plate is arranged on the left side of the clamp, and a first vacuum pumping hole communicated with the through groove is formed in the left air channel plate; the right air channel plate is arranged on the right side of the clamp, and a first air injection hole communicated with the through groove is formed in the right air channel plate; the upper air circuit board is arranged on the front side of the clamp, and a second vacuum pumping hole communicated with the through groove is formed in the upper air circuit board; and the lower gas injection hole is formed in the lower gas circuit board and communicated with the through groove.
In an embodiment of the present invention, the two-way air hole is connected to the first vacuum pump and the first air injection pump simultaneously.
In one embodiment of the present invention, the fixture is provided with a plurality of horizontal through holes facing the through groove, and the first vacuum pumping hole, the first gas injection hole, the second vacuum pumping hole and the second gas injection hole are communicated with the through groove through the horizontal through holes.
In an embodiment of the present invention, the first vacuum pumping hole and the second vacuum pumping hole are further connected to a third gas injection pump.
In an embodiment of the present invention, the first natural light source assembly includes two X-axis linear guide rails arranged in parallel, a first light source bracket arranged between the two X-axis linear guide rails, a first Z-axis lifting mechanism arranged on the first light source bracket, a first rotating mechanism connected to the bottom of the first Z-axis lifting mechanism, and a linear natural light source lamp set connected to the first rotating mechanism.
In an embodiment of the present invention, the first Z-axis lifting mechanism includes a lifting screw, a first lifting guide rod, a second lifting guide rod, an upper guide support plate and a lower guide support plate, the upper guide support plate and the lower guide support plate are arranged in parallel, the first lifting guide rod and the second lifting guide rod are respectively disposed at two sides of the lifting screw and are installed in parallel with the lifting screw, the upper ends of the lifting screw, the first lifting guide rod and the second lifting guide rod are connected to the upper guide support plate, and the lower ends of the lifting screw, the first lifting guide rod and the second lifting guide rod respectively penetrate through corresponding through holes on the first light source bracket and are connected to the lower guide support plate; the top end of the lifting screw is connected with the driving mechanism.
In an embodiment of the utility model, the first rotating mechanism includes a rotating guide plate, a rotating back plate and a rotating shaft, the upper end of the rotating guide plate is connected to one side of the lower guide support plate and one side of the upper guide support plate, the lower end of the rotating guide plate is provided with a rotating shaft seat, the rotating shaft seat is connected to the rotating back plate through the rotating shaft, the rotating back plate is provided with an installation seat, and the installation seat is connected to the linear natural light source lamp set.
In an embodiment of the present invention, the first natural light source assembly further includes a second light source bracket disposed between the two X-axis linear guide rails, a second Z-axis lifting mechanism disposed on the second light source bracket, a second rotating mechanism connected to the bottom of the second Z-axis lifting mechanism, and an arc natural light source lamp set connected to the second rotating mechanism.
In a second aspect, the present invention further provides a liquid crystal panel layering detection method, which is implemented by using the liquid crystal panel layering detection apparatus described above, and includes the following steps:
s1: horizontally placing a calibration plate on a moving platform deck, installing a natural light source camera component above the calibration plate, arranging a camera perpendicular to the calibration plate, lighting a first natural light source component and a second natural light source component, shooting the calibration plate by the natural light source camera component, marking as a first calibration image, and closing the first natural light source component and the second natural light source component;
s2: lighting a first ultraviolet light source assembly, and shooting a calibration plate by a first ultraviolet light source camera assembly to be marked as a calibration graph II;
s3: calling an automatic calibration algorithm to convert and unify coordinate systems of the natural light source camera assembly and the first ultraviolet light source camera assembly by using the calibration chart I and the calibration chart II shot in the steps S1 and S2;
s4: horizontally arranging the liquid crystal panel on a movable platform deck, and arranging a natural light source camera component above the liquid crystal panel and arranging a camera vertically to the liquid crystal panel; lighting the first natural light source assembly and the second natural light source assembly, moving the liquid crystal panel, shooting the liquid crystal panel by the natural light source camera assembly, recording as a first image, and closing the first natural light source assembly and the second natural light source assembly;
s5: lighting a first ultraviolet light source assembly and a second ultraviolet light source assembly, and shooting the liquid crystal panel by the first ultraviolet light source camera assembly and the second ultraviolet light source camera assembly to be respectively marked as a second image and a third image;
s6: and carrying out mirror image turning operation on the third image, then finding out the defect points of the first image, the second image and the third image, recording the central coordinates x and y of the defect points of the three images, and carrying out result analysis.
In summary, the present invention provides a liquid crystal panel layered detection apparatus and method, and the beneficial effects of the present invention are:
the utility model detects the defect physical level of unqualified products of the liquid crystal panel, the first ultraviolet light source camera component and the second ultraviolet light source camera component shoot the upper/lower surface defect images of the liquid crystal panel under the short-wave ultraviolet light source, and the upper/lower surface defect images are respectively compared with the defect images of the liquid crystal panel shot by the natural light source camera component under the natural light source, and the foreign matter is distinguished in the liquid crystal panel or on the upper/lower surface, thereby realizing the defect layering function in the liquid crystal automatic detection equipment and realizing the surface dust filtration. The utility model has important significance for optimizing the production and manufacturing process of the liquid crystal panel or tracing the process flow of defective products, reducing the reported waste products and increasing the product yield.
Furthermore, the liquid crystal panel is borne by the air-floating mobile carrying platform, so that the upper surface and the lower surface of the liquid crystal panel are photographed by the first ultraviolet source camera component and the second ultraviolet source camera component under the condition of no turnover, the error caused by the turnover to photographing positioning is avoided, the photographing precision is ensured, and the detection efficiency is improved. The liquid crystal panel is grabbed by the sucker and placed in the through groove, and the peripheral edge of the inner periphery of the air channel bottom plate is convexly provided to form a bearing edge, so that the workpiece can be contacted with the bearing edge of the air channel bottom plate through the peripheral part of the workpiece, and the workpiece is supported by the bearing edge. Then start first gas injection pump, second gas injection pump, gaseous by the gas injection hole get into and pass horizontal through-hole entering logical groove to gaseous from the two-way gas pocket of gas circuit bottom plate lets in, and the work piece is propped up to gas, then closes first gas injection pump, forms the gas film that a layer is stable, has certain pressure in the clearance between work piece and the stage body, opens first vacuum pump and second vacuum pump, and the gas film provides a non-contact's holding power. The supporting force balances the gravity of the liquid crystal panel and the vacuum adsorption force provided by the air circuit bottom plate, the detection is finished, the third air injection pump is started, and the vacuum pressure is relieved.
Further, the utility model automatically distinguishes the defects on the surface of the liquid crystal panel and the defects in the liquid crystal panel, and improves the detection efficiency. And according to the liquid crystal panels with different thicknesses or different specifications, the heights and the irradiation angles of the light source components in the natural light source camera component, the first ultraviolet light source camera component and the second ultraviolet light source camera component are adjusted, the photographing quality is improved, and the detection precision is further ensured.
Furthermore, the utility model realizes the adjustment of the light source in the X direction through the X-axis linear guide rail, and realizes the lifting of the natural light source lamp group in the Z direction through the Z-axis lifting mechanism, thereby changing the height. The rotation of the angle of the natural light source lamp group is realized through the rotating mechanism. The utility model not only is provided with a plurality of light source lamp groups to enlarge the illumination range, but also can adjust different angles, is convenient to operate and use, solves the problems that the existing illumination angle is limited to adjust and cannot be moved, has wide application range and has good economic benefit.
Furthermore, the camera is installed and fixed by arranging the main movable locking plate and the hinge, compatibility with cameras of different specifications is guaranteed, the structure is simple, the camera is convenient to use, disassemble and assemble, the manufacturing cost is low, and the camera is not easy to damage. The camera adjusting mechanism has the advantages that the initial angle adjustment of the camera is achieved through the manual adjusting mechanism, then the electric adjusting mechanism is adopted to conduct secondary angle adjustment on the camera, position deviation caused by the fact that external force is removed in the manual adjusting process is well avoided, the camera assembly can be accurately located at a target position, the precision of visual detection is improved, and the visual detection effect is improved.
Drawings
Fig. 1 is a schematic perspective view of a liquid crystal panel layered detection apparatus according to an embodiment of the present invention.
Fig. 2 is a front view of a liquid crystal panel delamination inspection apparatus according to an embodiment of the utility model.
Fig. 3 is a schematic perspective view of the movable stage in fig. 1.
Fig. 4 is a schematic perspective view of the stage of fig. 3.
FIG. 5 is a top view of the upper light source module of FIG. 1.
FIG. 6 is a schematic perspective view of the first natural light source assembly shown in FIG. 5.
FIG. 7 is a top view of the first natural light source assembly of FIG. 6.
Fig. 8 is a cross-sectional view a-a of fig. 7.
Fig. 9 is a schematic perspective view of the backlight assembly in fig. 1.
Fig. 10 is a schematic perspective view of the natural light source camera module shown in fig. 1.
Fig. 11 is a right side view of the natural light source camera assembly of fig. 10.
Fig. 12 is a rear view of the natural light source camera assembly of fig. 10.
To illustrate the element symbols:
1. a base; 101. an X-axis linear module; 102. a first X-axis linear guide;
2. moving the carrier; 201. a table body; 202. a clamp; 203. a gas circuit bottom plate; 204. a left gas circuit board; 205. a right gas circuit board; 206. an upper gas circuit board; 207. a lower gas circuit board; 208. bearing compression rings; 209. a slider substrate;
3. an upper light source assembly; 31. a first natural light source assembly; 311. a second X-axis linear guide; 312. a first light source holder; 3121. a rail clamp; 3131. a first lifting screw; 3132. a first lifting guide rod; 3133. a second lifting guide rod; 3134. an upper guide support plate; 3135. a lower guide support plate; 3136. a knob; 3137. a lifting plate; 3141. rotating the guide plate; 3142. rotating the back plate; 3143. a rotating shaft; 3144. a rotating shaft seat; 3151. a first linear natural light source lamp group; 3161. arc light connecting plates; 3162. an arc natural light source lamp group; 32. a first ultraviolet light source assembly;
4. a natural light source camera assembly; 41. rotating the support; 42. a camera support; 43. a camera mounting plate; 431. a waist hole; 432. a strip fixing hole; 44. a main movable locking plate; 45. a camera; 451. a threaded hole; 46. a hinge; 461. a side movable lock plate; 4611. a fixing hole; 462. a movable connecting plate; 471. a camera angle adjustment manual rotation platform; 472. the clamp angle adjustment manual rotation platform; 481. an electrically powered rotating platform; 482. an electric pitching table; 483. a first stepper motor; 484. a second stepping motor;
5. a first ultraviolet light source camera assembly; 6. a second ultraviolet light source camera assembly;
7. a backlight unit; 71. a fourth X-axis linear guide; 72. a movable guide plate; 73. a slider; 74. a rotating plate; 741. a driven rotating shaft; 742. a second retaining ring; 743. a first retaining ring; 751. a guide rod support plate; 752. a lifting guide plate; 753. installing a guide plate; 754. a second lifting screw; 755. a third lifting guide rod; 756. a fourth lifting guide rod; 76. a second linear natural light source lamp group; 77. a second linear ultraviolet source lamp group; 771. a rotating shaft seat.
Detailed Description
In order to make 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 described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 and 2, the present invention provides a liquid crystal panel delamination inspection apparatus, which includes: the device comprises a base 1, a movable carrying platform 2, a natural light source camera component 4, a first ultraviolet light source camera component 5, a second ultraviolet light source camera component 6, an upper light source component 3 and a backlight source component 7. Wherein, the movable carrying platform 2 is arranged above the base 1. The natural light source camera component 4, the upper light source component 3 and the first ultraviolet light source camera component 5 are located on one side of the movable carrying platform 2, the second ultraviolet light source camera component 6 and the backlight source component 7 are located on the other side of the movable carrying platform 2, and the first ultraviolet light source camera component 5 and the second ultraviolet light source camera component 6 are symmetrically arranged by taking the movable carrying platform 2 as an axis.
Wherein, one side of base 1 top is provided with X axle straight line module 101, and the opposite side of base 1 top is provided with the first X axle linear guide 102 parallel with X axle straight line module 101, and the bottom of moving microscope stage 2 links to each other with X axle straight line module 101, first X axle linear guide 102 respectively, and the one end of X axle straight line module 101 links to each other with actuating mechanism. The arrangement of the X-axis linear module 101 and the first X-axis linear guide rail 102 realizes that the moving stage 2 moves along the X-axis direction, and the moving stage 2 drives the liquid crystal panel to move along the X-axis direction.
Preferably, the movable carrier 2 is an air floating platform to realize suspension of the liquid crystal panel, so that the first ultraviolet source camera component 5 and the second ultraviolet source camera component 6 can conveniently shoot the upper and lower surfaces of the liquid crystal panel and transmit the shot images to the processor for processing.
Specifically, referring to fig. 3, the moving stage 2 includes: the gas circuit board comprises a table body 201, a clamp 202, a gas circuit bottom plate 203, a left gas circuit board 204, a right gas circuit board 205, an upper gas circuit board 206, a lower gas circuit board 207 and a slider substrate 209.
The slider substrate 209 is disposed on the periphery of the stage 201, and a bearing press ring 208 is disposed between the slider substrate and the stage 209. The bottom of the slider substrate 209 is connected to the upper sides of the X-axis linear module 101 and the first X-axis linear guide 102 through spacers, respectively.
As shown in fig. 4, the clamp 202 is disposed on the top surface of the table 201, and a through slot is formed in the center of the clamp 202; the gas circuit bottom plate 203 is arranged around the bottom of the through groove, a bearing edge is formed by protruding the inner periphery of the gas circuit bottom plate 203, a bidirectional gas hole which is longitudinally extended from the bottom edge of the gas circuit bottom plate 203 and communicated with the through groove is formed in the bearing edge, and the bidirectional gas hole is simultaneously connected with the first vacuum pump and the first gas injection pump, so that the bidirectional gas hole has two functions of gas injection and gas extraction.
The left air channel plate 204 is arranged on the left side of the clamp 202, and a first vacuum pumping hole communicated with the through groove is formed in the left air channel plate 204; the right gas circuit board 205 is arranged on the right side of the clamp 202, and a first gas injection hole communicated with the through groove is formed in the right gas circuit board 205; the upper air plate 206 is arranged on the front side of the clamp 202, and a second vacuum pumping hole communicated with the through groove is formed in the upper air plate 206; the lower air plate 207 is arranged at the rear side of the clamp 202, and a second air injection hole communicated with the through groove is formed in the lower air plate 207.
The first vacuum pumping hole and the second vacuum pumping hole are respectively connected with a second vacuum pump and used for pumping air to realize the correction of the liquid crystal panel, the first air injection hole and the second air injection hole are respectively connected with a second air injection pump, and the first air injection hole and the second air injection hole are used for blowing air to realize the suspension of the liquid crystal panel.
Furthermore, the first vacuum pumping hole and the second vacuum pumping hole are also connected with a third gas injection pump, and gas is injected into the through groove through the first vacuum pumping hole and the second vacuum pumping hole to realize vacuum breaking after the detection is finished.
In this embodiment, the inside horizontal through-hole that is provided with a plurality of orientation logical grooves of anchor clamps 202, first vacuum take out hole, first gas injection hole, second vacuum take out hole and second gas injection hole through horizontal through-hole and logical groove intercommunication.
In this embodiment, the specific operation of the mobile carrier 2 is as follows: the liquid crystal panel is grabbed by the sucker and placed in the through groove, and the peripheral edge of the inner periphery of the air channel bottom plate 203 is convexly provided to form a bearing edge, so that the liquid crystal panel can be contacted with the bearing edge of the air channel bottom plate 203 through the peripheral part of the liquid crystal panel, and a workpiece is supported by the bearing edge. Then start first gas injection pump, second gas injection pump, gaseous by the gas injection hole get into and pass horizontal through-hole entering logical groove to gaseous from the two-way gas pocket of gas circuit bottom plate 203 lets in, the work piece is propped up to gas, then closes first gas injection pump, forms the gas film that a layer is stable, has certain pressure in the clearance between work piece and the stage body 201, opens first vacuum pump and second vacuum pump, and gas film provides a non-contact's holding power. The supporting force balances the gravity of the liquid crystal panel itself and the vacuum suction force provided by the gas circuit substrate 203. The X-axis linear module 101 drives the movable carrying platform 2 to move along the X-axis direction, the movable carrying platform 2 drives the liquid crystal panel to the corresponding camera assembly to take a picture, and after the picture is taken, the third air injection pump is started to release the vacuum pressure.
In other embodiments, the moving carrier 2 may also adopt other liquid crystal panels to realize suspension, which can all meet the detection requirements of the present invention, and all belong to the protection scope of the present invention.
Next, referring to fig. 5, the upper light source assembly 3 includes a first natural light source assembly 31 positioned below the natural light source camera assembly 4, and a first ultraviolet light source assembly 32 positioned below the first ultraviolet light source camera assembly 5.
As shown in fig. 6 and 7, the first natural light source assembly 31 includes two second X-axis linear guide rails 311 arranged in parallel, a first light source bracket 312 arranged between the two second X-axis linear guide rails 311, a first Z-axis lifting mechanism arranged on the first light source bracket 312, a first rotating mechanism connected to the bottom of the first Z-axis lifting mechanism, and a first linear natural light source lamp group 3151 connected to the first rotating mechanism.
The first light source support 312 and the two second X-axis linear guide rails 311 are connected through the rail clamp 3121, and the position of the first light source support 312 on the second X-axis linear guide rails 311 can be adjusted as required, so as to further adjust the position of the light source assembly in the X direction.
The first Z-axis lifting mechanism realizes the lifting of the first linear natural light source lamp group 3151 in the Z-axis direction. Specifically, referring to fig. 8, the first Z-axis lifting mechanism includes a first lifting screw 3131, a first lifting guide rod 3132, a second lifting guide rod 3133, an upper guide support plate 3134, a lower guide support plate 3135, and a lifting plate 3137, wherein the upper guide support plate 3134 is parallel to the lower guide support plate 3135, and one sides of the upper guide support plate 3134 and the lower guide support plate 3135 are connected to the lifting plate 3137. First lifting guide rod 3132 and second lifting guide rod 3133 are respectively disposed on two sides of first lifting screw 3131 and are installed in parallel with the first lifting screw 3131, the upper ends of first lifting screw 3131, first lifting guide rod 3132 and second lifting guide rod 3133 are connected to upper guide support plate 3134, and the lower ends of first lifting screw 3131, first lifting guide rod 3132 and second lifting guide rod 3133 respectively penetrate through corresponding through holes on first light source support 312 and are connected to lower guide support plate 3135; the top end of the first lifting screw 3131 is connected to a driving mechanism. In this embodiment, the driving mechanism is a knob 3136.
Furthermore, the first rotation mechanism realizes that the first linear natural light source lamp group 3151 rotates around the Y axis as the center line. The first rotating mechanism comprises a rotating guide plate 3141, a rotating back plate 3142 and a rotating shaft 3143, the upper end of the rotating guide plate 3141 is connected with the other sides of the upper guide supporting plate 3134 and the lower guide supporting plate 3135, the lower end of the rotating guide plate 3141 is provided with a rotating shaft seat 3144, and the rotating shaft seat 3144 is connected with the rotating back plate 3142 through the rotating shaft 3143.
Further, the rotating back plate 3142 is provided with a mounting seat, which is connected with the first linear natural light source lamp group 3151.
In this embodiment, the first natural light source assembly 31 further includes a second light source bracket disposed between the two second X-axis linear guide rails 311, a second Z-axis lifting mechanism disposed on the second light source bracket, a second rotating mechanism connected to the bottom of the second Z-axis lifting mechanism, and an arc natural light source lamp group 3162 connected to the second rotating mechanism. The arc natural light source lamp group 3162 is mainly used for detecting curved edges, ink and the like.
Specifically, the second Z-axis lifting mechanism is the same as the first Z-axis lifting mechanism, the second Z-axis lifting mechanism includes a first lifting screw 3131, a first lifting guide rod 3132, a second lifting guide rod 3133, an upper guide support plate 3134 and a lower guide support plate 3135, the upper guide support plate 3134 is parallel to the lower guide support plate 3135, the first lifting guide rod 3132 and the second lifting guide rod 3133 are respectively disposed at two sides of the first lifting screw 3131 and are mounted parallel thereto, the upper ends of the first lifting screw 3131, the first lifting guide rod 3132 and the second lifting guide rod 3133 are connected to the upper guide support plate 3134, and the lower ends of the first lifting screw 3131, the first lifting guide rod 3132 and the second lifting guide rod 3133 respectively penetrate through corresponding through holes on the second light source support to be connected to the lower guide support plate 3135; the top end of the first lifting screw 3131 is connected to a driving mechanism.
Specifically, the second rotating mechanism is similar to the first rotating mechanism in structure, and includes a rotating guide plate 3141, a rotating back plate 3142 and a rotating shaft 3143, the upper end of the rotating guide plate 3141 is connected to one side of the lower guide support plate 3135 and one side of the upper guide support plate 3134, the lower end of the rotating guide plate 3141 is provided with a rotating shaft seat 3144, and the rotating shaft seat 3144 is connected to the rotating back plate 3142 through the rotating shaft 3143. Further, the middle portion of the rotating back plate 3142 is connected to the arc natural light source lamp group 3162 through the arc link plate 3161.
The first ultraviolet light source assembly 32 includes two third X-axis linear guide rails arranged in parallel, a third light source support arranged between the two third X-axis linear guide rails, a third Z-axis lifting mechanism arranged on the third light source support, a third rotating mechanism connected with the bottom of the third Z-axis lifting mechanism, and a first ultraviolet light source lamp set connected with the third rotating mechanism.
The third Z-axis lifting mechanism and the first rotating mechanism have the same or similar structural principle, and the lifting of the first linear ultraviolet light source lamp group in the Z direction is realized. The third Z-axis lifting mechanism includes a first lifting screw 3131, a first lifting guide rod 3132, a second lifting guide rod 3133, an upper guide supporting plate 3134, a lower guide supporting plate 3135, and a lifting plate 3137, wherein the upper guide supporting plate 3134 is parallel to the lower guide supporting plate 3135, and one sides of the upper guide supporting plate 3134 and the lower guide supporting plate 3135 are connected to the lifting plate 3137. A first lifting guide rod 3132 and a second lifting guide rod 3133 are respectively arranged on two sides of the first lifting screw 3131 and are installed in parallel with the first lifting screw 3131, the upper ends of the first lifting screw 3131, the first lifting guide rod 3132 and the second lifting guide rod 3133 are connected with an upper guide support plate 3134, and the lower ends of the first lifting screw 3131, the first lifting guide rod 3132 and the second lifting guide rod 3133 respectively penetrate through corresponding through holes on the third light source support to be connected with a lower guide support plate 3135; the top end of the first lifting screw 3131 is connected to a driving mechanism.
The third rotating mechanism and the first rotating mechanism have the same or similar structural principle, and the first linear ultraviolet light source lamp group rotates by taking the Y axis as a central line. The third rotating mechanism comprises a rotating guide plate 3141, a rotating back plate 3142 and a rotating shaft 3143, the upper end of the rotating guide plate 3141 is connected with the other sides of the upper guide supporting plate 3134 and the lower guide supporting plate 3135, the lower end of the rotating guide plate 3141 is provided with a rotating shaft seat 3144, and the rotating shaft seat 3144 is connected with the rotating back plate 3142 through the rotating shaft 3143.
Further, a rotation shaft seat is mounted on the rotation back plate 3142, and the rotation shaft seat is connected with the first linear ultraviolet light source lamp set through a rotation shaft, so that the first linear ultraviolet light source lamp set rotates by taking the X axis as a central line.
Further, the first ultraviolet light source assembly 32 further includes a fourth light source support disposed between the two third X-axis linear guide rails, a fourth Z-axis lifting mechanism disposed on the fourth light source support, a fourth rotating mechanism connected to the bottom of the fourth Z-axis lifting mechanism, and an arc ultraviolet light source lamp set connected to the fourth rotating mechanism. The arc ultraviolet light source lamp group is used for curved edges, printing ink and the like.
The fourth Z-axis lifting mechanism and the second Z-axis lifting mechanism have the same or similar structural principles, and the fourth rotating mechanism and the second rotating mechanism have the same or similar structural principles.
Next, referring to fig. 9, the backlight assembly 7 includes a fourth X-axis linear guide 71 located at the bottom of the base 1, a second natural light source assembly located at the other side of the movable stage 2 relative to the first natural light source assembly 31, and a second ultraviolet light source assembly located between the second ultraviolet light source camera assembly 6 and the movable stage 2.
The second natural light source assembly comprises a movable guide plate 72, a rotating plate 74, a fifth Z-axis lifting mechanism and a second linear natural light source lamp group 76.
The top of the movable guide plate 72 is connected with the fourth X-axis linear guide 71 through a slider 73, the movable guide plate 72 is U-shaped, one end of the movable guide plate 72 is provided with a rotating shaft seat, the rotating shaft seat is connected with the first fixing ring 743 through a friction spacer, one side of the first fixing ring 743 is connected with one side of the bottom of the rotating plate 74, the other end of the movable guide plate 72 is provided with a rotating shaft seat, the rotating shaft seat is connected with the second fixing ring 742 through a driven rotating shaft 741, and the second fixing ring 742 is connected with the other side of the bottom of the rotating plate 74. The structural design realizes that the rotating plate 74 rotates by taking the Y axis as the center, and then the rotating plate 74 drives the second linear natural light source lamp group 76 to rotate by taking the Y axis as the center line.
Further, the fifth Z-axis lifting mechanism comprises a second lifting screw 754, a third lifting guide 755, a fourth lifting guide 756, a guide plate 751, an installation guide 753 and a lifting guide 752, the guide plate 751 is arranged in parallel with the lifting guide 752 and the installation guide 753, the third lifting guide 755 and the fourth lifting guide 756 are respectively arranged on two sides of the second lifting screw 754 and are installed in parallel with the second lifting screw 754, the upper ends of the second lifting screw 754, the third lifting guide 755 and the fourth lifting guide 756 are connected with the guide plate 751, the lower ends of the second lifting screw 754, the third lifting guide 755 and the fourth lifting guide 756 penetrate through the lifting guide 752 to be connected with the installation guide 753, and the lifting guide 752 is connected with the second linear natural light source lamp group.
The second ultraviolet light source assembly comprises a movable guide plate 72, a rotating plate 74, a sixth Z-axis lifting mechanism and a second linear ultraviolet light source lamp set 77, and the top of the movable guide plate 72 is connected with a fourth X-axis linear guide rail 71 through a sliding block 73.
The movable guide plate 72 is U-shaped, a rotating shaft seat is arranged at one end of the movable guide plate 72, the rotating shaft seat is connected with the first fixing ring 743 through a friction spacer, one side of the first fixing ring 743 is connected with one side of the bottom of the rotating plate 74, the rotating shaft seat is arranged at the other end of the movable guide plate 72, the rotating shaft seat is connected with the second fixing ring 742 through a driven rotating shaft 741, and the second fixing ring 742 is connected with the other side of the bottom of the rotating plate 74.
Further, the sixth Z-axis lifting mechanism includes a second lifting screw 754, a third lifting guide 755, a fourth lifting guide 756, a guide plate 751, an installation guide 753 and a lifting guide 752, the guide plate 751 is parallel to the lifting guide 752 and the installation guide 753, the third lifting guide 755 and the fourth lifting guide 756 are respectively disposed on two sides of the second lifting screw 754 and are parallel to the second lifting screw 754, upper ends of the second lifting screw 754, the third lifting guide 755 and the fourth lifting guide 756 are connected to the guide plate 751, lower ends of the second lifting screw 754, the third lifting guide 755 and the fourth lifting guide 756 pass through the lifting guide 752 to be connected to the installation guide 753, and the lifting guide 752 is connected to the second linear ultraviolet lamp set 77.
Further, a rotating shaft seat 771 is arranged on the lifting guide plate 752, and the rotating shaft seat 771 is connected with the second linear ultraviolet source lamp set 77 through a rotating shaft.
Referring next to fig. 10 to 12, the natural light source camera assembly 4 includes: a swivel mount 41, two camera brackets 42, a camera mounting plate 43, at least one main moveable lock plate 44, at least one front camera mount, a manual adjustment mechanism, and a motorized adjustment mechanism.
Wherein the rotating support 41 is U-shaped for supporting the camera 45.
Two camera brackets 42 are arranged in parallel in the rotating support 41, wherein one side of one camera bracket 42 is connected with the left section of the rotating support 41 through a rotating shaft, and one side of the other camera bracket 42 is connected with the right section of the rotating support 41.
The camera mounting plate 43 is disposed between the two camera brackets 42, and both sides of the camera mounting plate 43 are connected to the two camera brackets 42, respectively. Waist holes 431 are respectively arranged on the two sides of the camera mounting plate 3, and a through hole is arranged in the middle of the camera mounting plate 43.
The two sides of the main movable locking plate 44 are movably connected with the waist hole 431 through locking plate fixing pieces respectively, and a long fixing hole 432 is arranged between the movable locking plate and the camera mounting plate 43 and/or between the adjacent movable locking plates. Further, the locking plate fixing piece is selected from fixing pieces such as a bolt and a screw.
In this embodiment, three main movable locking plates 44 are provided, two sides of the three main movable locking plates 44 are respectively connected with the waist hole 431 through bolts, the three main movable locking plates 44 are arranged in parallel, and the distance between the three main movable locking plates 44 is adjusted according to the specification of the camera 45.
The front camera mount is connected to the threaded hole 451 on the front side of the camera 45 through the elongated mount hole 432 and the through hole in this order. Further, the diameter of the front camera mount matches the width of the elongated mounting holes 432 to accommodate the camera mount being secured within the elongated mounting holes 432. Further, the front camera fixing part is a fixing part such as a bolt and a screw.
In this embodiment, two bolts or screws are used to pass through the elongated fixing holes 432 and the through holes respectively and connect with the threaded holes 451 on the front surface of the camera 45. If a short version of the camera 5 is used, a row of bolts or screws may be provided for fixing. If a long camera 45 is used, two or three rows of bolts or screws may be provided for fixing.
More preferably, since only the front surface of the camera 45 is not fixed stably, the hinge 46 is provided on both sides of the camera 45 to fix the camera 45 on three surfaces. The hinge 46 is disposed at the lower side of the camera support 42, a fixing hole 4611 is disposed on the hinge 46, and the side camera fixing member passes through the fixing hole 4611 to be connected with a screw hole at the side of the camera 45.
In this embodiment, the hinge 46 includes a movable connecting plate 462 and a side movable locking plate 461, one end of the movable connecting plate 462 is connected to the bottom of the camera bracket 42, the other end is rotatably connected to the side movable locking plate 461, a fixing hole 4611 is formed in the middle of the side movable locking plate 461, and the side camera fixing member passes through the fixing hole 4611 to be connected to the screw hole on the side of the camera. Further, the side camera fixing piece is a fixing piece such as a bolt and a screw.
In addition, the manual adjusting mechanism comprises a camera angle adjusting manual rotating platform 471 and a clamp angle adjusting manual rotating platform 472, one side of the camera angle adjusting manual rotating platform 471 is arranged as a chassis, the other side of the camera angle adjusting manual rotating platform is arranged as a rotating platform, the camera angle adjusting manual rotating platform 471 is connected with the right section of the rotating support 41 through the chassis, the camera angle adjusting manual rotating platform 471 is connected with the camera support 42 through the rotating platform, and the clamp angle adjusting manual rotating platform 472 is installed on one side of the middle part of the rotating support 41.
Further, camera angle modulation manual rotation platform 471 and anchor clamps angle modulation manual rotation platform 472 all adopt manual rotatory slip table, use the alternately roller collar direction of ultra-high precision, are driven by minute card, have the super high sensitivity that is not more than 1um, and the mesa operates steadily, and the running accuracy is high, and mark matches minute card drive, cooperation vernier scale, ability accurate positioning. According to the utility model, the camera 45 is rotated by the camera angle adjusting manual rotating platform 471, so that the angle of the camera 45 is adjusted, the rotating support 41 is rotated by the clamp angle adjusting manual rotating platform 472, and the angle of the camera 45 is adjusted.
Furthermore, the manual adjustment mechanism adopts manual adjustment, external force generally exists, and deviation can occur after the manual adjustment mechanism is removed, so that the electric adjustment mechanism is used for correcting, and the positioning precision is improved. The setting of electronic adjustment mechanism also makes things convenient for the regulation of camera angle in the testing process. The electric adjusting mechanism includes an electric rotary stage 481, a first stepping motor 483, an electric pitching stage 482 and a second stepping motor 484, the electric rotary stage 481 is provided on the side of the jig angle adjusting manual rotary stage 472, and the first stepping motor 483 is connected to one end of the electric rotary stage 481. The electric rotary platform 481 drives the clamp angle adjustment manual rotary platform 472 to rotate for angle adjustment. The power-operated tilting stage 482 is disposed at one side of the power-operated rotating stage 481, and the second stepping motor 484 is connected to one end of the power-operated tilting stage 482. The electric pitching platform 482 drives the electric rotating platform 481 to perform pitching adjustment. The electric adjusting mechanism automatically adjusts the angle of the camera according to the angle requirement of the camera 45 in visual detection, so that the angle adjusting time is saved, and the camera can be quickly and accurately positioned at a target position.
Further, the structural design of the natural light source camera assembly 4 is suitable for the structures of the first ultraviolet light source camera assembly 5 and the second ultraviolet light source camera assembly 6, the structural design of the natural light source camera assembly 4 is high in practicability, cameras compatible with different specifications are guaranteed, the structure is simple, the use and the disassembly and assembly are convenient, and the manufacturing cost is low.
The utility model also provides a liquid crystal display panel layering detection method, which comprises the following steps:
s1: horizontally placing a calibration plate on a movable carrier 2, installing a natural light source camera component 4 above the calibration plate, vertically arranging a camera and the calibration plate, lighting a first natural light source component 31 and a second natural light source component, shooting the calibration plate by the natural light source camera component 4, marking as a first calibration drawing, and closing the first natural light source component 31 and the second natural light source component;
s2: lighting the first ultraviolet light source assembly 32, and shooting the calibration board by the first ultraviolet light source camera assembly 5, and recording as a calibration graph II;
s3: calling an automatic calibration algorithm to convert and unify coordinate systems of the natural light source camera assembly 4 and the first ultraviolet light source camera assembly 5 by using the calibration chart I and the calibration chart II shot in the steps S1 and S2;
specifically, automatic calibration is performed after the calibration image photographing is completed, and the coordinate systems of the two cameras are unified into one world coordinate system using the calibration image under the normal light source and the calibration image under the ultraviolet light source, so that the liquid crystal panel images photographed in the subsequent steps S4, S5, and S6 can be defect-matched.
S4: horizontally arranging a liquid crystal panel on a movable carrier 2, and arranging a natural light source camera component 4 above the liquid crystal panel and arranging a camera vertically to the liquid crystal panel; lighting the first natural light source assembly 31 and the second natural light source assembly, moving the liquid crystal panel, shooting the liquid crystal panel by the natural light source camera assembly 4, recording as a first image, and closing the first natural light source assembly 31 and the second natural light source assembly;
s5: lighting a first ultraviolet light source component and a second ultraviolet light source component, and shooting the liquid crystal panel by a first ultraviolet light source camera component 5 and a second ultraviolet light source camera component 6 which are respectively marked as a second image and a third image;
s6: and carrying out mirror image turning operation on the third image, then finding out the defect points of the first image, the second image and the third image, recording the central coordinates x and y of the defect points of the three images, and carrying out result analysis.
Specifically, first, the cameras of the first image and the second image are automatically corrected, and the defects extracted from the two images can be completely overlapped under an ideal condition, but due to errors caused by the movement of the mechanism, the extracted defects may have the position difference of the same pixel value in the movement direction. Secondly, the optical axes of the second image and the third image are coincident, and ideally, the third image is vertically turned by 180 degrees, so that the second image and the third image are coincident. However, since the optical axes of the two cameras cannot be completely coincident, the two images may have a positional difference of several pixels. Given a matching range r, the defects extracted from the first, second and third images can be matched one by one, and the result can be analyzed. For example, the first image has a defect center coordinate of x1、y1The central coordinate of the defect site of the second image is x2、y2The defect distance of the two images is
If R is<r can be considered to be the same defect.
The results were analyzed as:
if the corresponding position (within the radius r) on the first image and the second image is matched with a defect and the corresponding position (within the radius r) on the third image has no corresponding defect, the defect is positioned on the upper surface of the liquid crystal panel.
If the first image has a defect, and the corresponding position (within the radius r) of the second image and the third image has no corresponding defect, the defect is located inside the liquid crystal panel.
If the corresponding position (within the radius r) of the first image and the third image is matched with the defect, the corresponding position (within the radius r) of the second image has no corresponding defect, namely the defect is positioned on the lower surface of the liquid crystal panel.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A liquid crystal panel layering detection apparatus, characterized in that it includes: the device comprises a base, a movable platform deck, a natural light source camera component, a first ultraviolet light source camera component, a second ultraviolet light source camera component, an upper light source component and a backlight source component, wherein the movable platform deck adopts an air floating platform, the movable platform deck is arranged above the base, the natural light source camera component, the upper light source component and the first ultraviolet light source camera component are all positioned on one side of the movable platform deck, the second ultraviolet light source camera component and the backlight source component are all positioned on the other side of the movable platform deck, and the first ultraviolet light source camera component and the second ultraviolet light source camera component are symmetrically arranged by taking the movable platform deck as an axis; the backlight source assembly comprises a second natural light source assembly and a second ultraviolet light source assembly, wherein the second natural light source assembly is positioned on the other side, opposite to the first natural light source assembly, of the moving platform deck, and the second ultraviolet light source assembly is positioned between the second ultraviolet light source camera assembly and the moving platform deck;
wherein the mobile carrier comprises:
a table body;
the clamp is arranged on the top surface of the table body, and a through groove is formed in the center of the clamp in a concave mode;
the gas circuit bottom plate is arranged around the bottom of the through groove, a bearing edge is formed by protruding the inner circumference of the gas circuit bottom plate, and a bidirectional gas hole which longitudinally extends from the bottom edge of the gas circuit bottom plate and is communicated with the through groove is arranged on the bearing edge;
the left air channel plate is arranged on the left side of the clamp, and a first vacuum pumping hole communicated with the through groove is formed in the left air channel plate;
the right air channel plate is arranged on the right side of the clamp, and a first air injection hole communicated with the through groove is formed in the right air channel plate;
the upper air circuit board is arranged on the front side of the clamp, and a second vacuum pumping hole communicated with the through groove is formed in the upper air circuit board;
the lower gas injection hole is communicated with the through groove;
a plurality of horizontal through holes are arranged in the fixture and face the direction of the through groove, and the first vacuum pumping hole, the first gas injection hole, the second vacuum pumping hole and the second gas injection hole are communicated with the through groove through the horizontal through holes.
2. The layered detection apparatus for liquid crystal panels according to claim 1, wherein a linear module is disposed on one side above the base, a linear guide rail parallel to the linear module is disposed on the other side above the base, the bottom of the movable stage is connected to the linear module and the linear guide rail, respectively, and one end of the linear module is connected to the driving mechanism.
3. The apparatus for inspecting delamination of liquid crystal panels as claimed in claim 1, wherein said bi-directional air hole is connected to a first vacuum pump and a first gas injection pump simultaneously.
4. The liquid crystal panel layering detection device of claim 1, wherein the first natural light source assembly comprises two X-axis linear guide rails arranged in parallel, a first light source bracket arranged between the two X-axis linear guide rails, a first Z-axis lifting mechanism arranged on the first light source bracket, a first rotating mechanism connected with the bottom of the first Z-axis lifting mechanism, and a linear natural light source lamp group connected with the first rotating mechanism.
5. The liquid crystal panel layering detection device according to claim 4, wherein the first Z-axis lifting mechanism comprises a lifting screw, a first lifting guide rod, a second lifting guide rod, an upper guide support plate and a lower guide support plate, the upper guide support plate and the lower guide support plate are arranged in parallel, the first lifting guide rod and the second lifting guide rod are respectively arranged on two sides of the lifting screw and are installed in parallel with the lifting screw, the upper ends of the lifting screw, the first lifting guide rod and the second lifting guide rod are connected with the upper guide support plate, and the lower ends of the lifting screw, the first lifting guide rod and the second lifting guide rod respectively penetrate through corresponding through holes in the first light source bracket and are connected with the lower guide support plate; the top end of the lifting screw is connected with the driving mechanism.
6. The liquid crystal panel layering detection device of claim 5, wherein the first rotating mechanism comprises a rotating guide plate, a rotating back plate and a rotating shaft, the upper end of the rotating guide plate is connected with one side of the lower guide support plate and one side of the upper guide support plate, the lower end of the rotating guide plate is provided with a rotating shaft seat, the rotating shaft seat is connected with the rotating back plate through the rotating shaft, the rotating back plate is provided with a mounting seat, and the mounting seat is connected with the linear natural light source lamp bank.
7. The apparatus for inspecting liquid crystal display panel layer according to claim 4, wherein the first natural light source assembly further comprises a second light source bracket disposed between the two X-axis linear guides, a second Z-axis lifting mechanism disposed on the second light source bracket, a second rotating mechanism connected to a bottom of the second Z-axis lifting mechanism, and an arc-shaped natural light source lamp set connected to the second rotating mechanism.
8. A liquid crystal panel delamination detection method implemented by the liquid crystal panel delamination detection apparatus of any one of claims 1 to 7, comprising the steps of:
s1: horizontally placing a calibration plate on a movable carrying platform, installing a natural light source camera component above the movable carrying platform, arranging a camera perpendicular to the calibration plate, lighting a first natural light source component and a second natural light source component, shooting the calibration plate by the natural light source camera component, recording as a first calibration image, and closing the first natural light source component and the second natural light source component;
s2: lighting a first ultraviolet light source assembly, and shooting a calibration plate by a first ultraviolet light source camera assembly to be marked as a calibration graph II;
s3: calling an automatic calibration algorithm to convert and unify coordinate systems of the natural light source camera assembly and the first ultraviolet light source camera assembly by using the calibration chart I and the calibration chart II shot in the steps S1 and S2;
s4: horizontally arranging the liquid crystal panel on a movable carrying platform, wherein the natural light source camera assembly is arranged above the movable carrying platform, and the camera is vertically arranged with the movable carrying platform; lighting the first natural light source assembly and the second natural light source assembly, moving the liquid crystal panel, shooting the liquid crystal panel by the natural light source camera assembly, recording as a first image, and closing the first natural light source assembly and the second natural light source assembly; wherein, the movable carrying platform adopts an air floating platform;
s5: lighting a first ultraviolet light source component and a second ultraviolet light source component, moving the liquid crystal panel, and shooting the upper surface and the lower surface of the liquid crystal panel by a first ultraviolet light source camera component and a second ultraviolet light source camera component which are respectively marked as a second image and a third image;
s6: and carrying out mirror image turning operation on the third image, then finding out the defect points of the first image, the second image and the third image, recording the central coordinates x and y of the defect points of the three images, and carrying out result analysis.
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| CN115508368B (en) * | 2022-11-18 | 2023-03-24 | 锦瑞信息科技(南通)有限公司 | Visual detection natural light source assembly for liquid crystal display panel processing |
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| CN2480870Y (en) * | 2001-05-09 | 2002-03-06 | 扬博企业股份有限公司 | Base board air floating type carrying platform |
| JP2011033449A (en) * | 2009-07-31 | 2011-02-17 | Sumco Corp | Method and apparatus for defect inspection of wafer |
| CN106442561B (en) * | 2016-08-29 | 2023-10-31 | 北京农业智能装备技术研究中心 | Online image acquisition system and method for detecting citrus peel defects |
| WO2018048843A1 (en) * | 2016-09-08 | 2018-03-15 | Corning Incorporated | Optical inspection systems and methods for detecting surface defects in a transparent sheet |
| CN107390393B (en) * | 2017-07-24 | 2020-09-22 | 惠州高视科技有限公司 | Re-judgment layering method after defect detection of liquid crystal module |
| CN210108992U (en) * | 2019-06-21 | 2020-02-21 | 银河水滴科技（北京）有限公司 | Optical detection equipment and optical detection system |
| CN110658206A (en) * | 2019-09-09 | 2020-01-07 | 武汉精立电子技术有限公司 | Panel defect layered detection device and method |
| CN111272777A (en) * | 2020-02-28 | 2020-06-12 | 合肥市商巨智能装备有限公司 | Defect layering detection device and method |
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