Liquid crystal panel edge optical detection device

Abstract

The application provides a liquid crystal panel edge optical detection device, which comprises two groups of detection units arranged along left-right symmetry, a channel space capable of allowing a detected panel to pass horizontally forward is arranged between the two groups of detection units; each group of detection units comprises a front surface camera, a front surface point light source, a back surface point light source and a back surface camera which are installed in a descending order of height, the lens of the front surface camera faces downward and is directly opposite to the upper side edge of the detected panel passing through the channel space, a back surface backlight source is further arranged above the front surface camera; the lens of the back surface camera faces upward and is directly opposite to the lower side edge of the detected panel 7 passing through the channel space, a front surface backlight source is further arranged below the back surface camera. The application is convenient to operate and improves the detection efficiency; the front surface point light source and the back surface point light source are used for light supplementing and brightening the surface of the product, the front surface backlight source and the back surface backlight source are used for brightening and shooting the background, the accuracy of image size measurement is improved, and it is easier to distinguish defects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-precision detection of the edge of a liquid crystal panel, and particularly relates to a liquid crystal panel edge optical detection device. BACKGROUND

[0002] A Cell screen is composed of a CF+TFT double-layer structure, and the structure of a liquid crystal panel is like a sandwich, with liquid crystal sandwiched between a lower TFT glass and an upper color filter (CF). The terminal Cell process in the manufacture of a liquid crystal panel is the upper and lower attachment of the TFT glass and the color filter. There are numerous pixels arranged on the upper TFT Array glass, and the color filter is an important source of picture color, and the liquid crystal is sandwiched between the TFT Array and the color filter. When the voltage is in the TFT (transistor), the liquid crystal turns, and light passes through the liquid crystal to generate a pixel on the panel.

[0003] After the Cell product ends the process, the product needs to be cut, ground and cleaned, and the cutting precision and grinding precision need to be detected after the cleaning ends, and defects such as burrs, cracks and edge collapse need to be detected. The production mode of the liquid crystal display module has realized automatic process, but the matching quality detection mode still adopts the traditional manual detection mode, the manual detection accuracy is low, many subtle defects are difficult to find, the detection efficiency is low, and the production efficiency is reduced. The common defects in the Cell screen include two types, one is that the cutting size does not meet the standard, and the common defects include the overall cutting size, the grinding size and the angle cutting size; and the other is the appearance type defect, including burrs, cracks, edge collapse and angle collapse. When the screen quality is manually judged, the size type defect needs to be measured by using a microscope, a large amount of manpower and material resources are consumed, and the efficiency is low. SUMMARY

[0004] The technical problem to be solved by the present application is:

[0005] The technical solution of the present application to solve the above technical problem is as follows:

[0006] The present application provides a liquid crystal panel edge optical detection device, which comprises two groups of detection units arranged symmetrically left and right, a channel space capable of allowing a detected panel to pass horizontally forward is arranged between the two groups of detection units; each group of detection units comprises a front camera, a front point light source, a back point light source and a back camera arranged in sequence from high to low, the lens of the front camera faces downward and directly faces the upper side edge of the detected panel passing through the channel space, and a back light source is further arranged above the front camera; the lens of the back camera faces upward and directly faces the lower side edge of the detected panel passing through the channel space, and a front light source is further arranged below the back camera.

[0007] The beneficial effects of the present application are: the present application detects simultaneously through the front camera and the back camera of the two groups of detection units, and the liquid crystal panel can pass through the channel space horizontally, which is convenient to operate and improves the detection efficiency; the surface of the product is lighted by the front point light source and the back point light source, and the background is lighted by the front backlight and the back backlight, so that the front camera and the back camera can shoot clear images, the contrast between the product edge and the background is increased, the accuracy of the image size measurement is improved, and the defects are more easily distinguished.

[0008] Based on the above technical solutions, the present application can be further improved as follows.

[0009] Further, the projection areas of the lens of the front camera and the lens of the back camera on the detected panel are the same.

[0010] The beneficial effects of the above further solutions are: during detection, the position of the detected panel is easy to align, and the image consistency is good; in addition, the images shot by the front camera and the back camera correspond to the same left and right positions of the detected panel, so that the three-dimensional image of the edge of the detected panel is easy to synthesize, and the defect position is easy to find.

[0011] Further, the front camera and the back camera are staggered in the front-rear direction of the channel space.

[0012] The beneficial effects of the above further solutions are: the front camera and the back camera are prevented from interfering with each other.

[0013] Further, the front point light source and the back backlight are installed on the front camera, and the back point light source and the front backlight are installed on the back camera.

[0014] The beneficial effects of the above further solutions are: when the relative positions of the front camera and the back camera are adjusted, the front point light source and the back backlight move synchronously with the front camera, and the back point light source and the front backlight move synchronously with the back camera, without affecting the image effect.

[0015] Further, each group of detection units further includes a first linear slide, which is arranged horizontally perpendicular to the front-rear direction of the channel space, and the front camera and the back camera are respectively installed at the moving end of the independent first linear slide.

[0016] The beneficial effects of the above further solutions are: the horizontal positions of the front camera and the back camera relative to the detected panel are easy to adjust independently, and the long side, the short side and different specifications of the detected panel are easy to adapt.

[0017] Further, each group of detection units further includes a second linear slide, which is arranged vertically, the fixed end of each first linear slide is connected to the moving end of one second linear slide, and the fixed end of the second linear slide is installed on the external fixed structure.

[0018] The beneficial effect of the above further scheme is that the height of the front camera and the back camera relative to the panel under test can be adjusted independently, and the imaging effect can be adjusted.

[0019] Further, the front backlight source is a downward parallel light source.

[0020] The beneficial effect of the above further scheme is that the background can be fully illuminated, and the background brightness uniformity is good.

[0021] Further, the back backlight source is an upward parallel light source.

[0022] The beneficial effect of the above further scheme is that the background can be fully illuminated, and the background brightness uniformity is good.

[0023] Further, the front camera and the back camera are both 2K network port line array scanning cameras, and the 2K network port line array scanning cameras are equipped with a telecentric lens.

[0024] The beneficial effect of the above further scheme is that the high-precision requirement of size detection is achieved, and within a certain object distance range, the image magnification obtained will not change with the change of the object distance, so that the size measurement accuracy is high. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present application.

[0026] Figure 2 It is a top view of Figure 1 .

[0027] Figure 3 It is a side view of Figure 1 .

[0028] In the drawings, the technical features represented by each reference sign are as follows:

[0029] 1-front camera; 2-back camera; 3-front point light source; 4-back point light source; 5-front backlight source; 6-back backlight source; 7-panel under test; 8-channel space; 9-first linear slide; 10-second linear slide. DETAILED DESCRIPTION

[0030] The principles and features of the present application are described below, and the examples are only used to explain the present application, and are not used to limit the scope of the present application.

[0031] The present application refers to Figures 1-3 .

[0032] Example one, as shown in Figures 1-3 :

[0033] The application provides a liquid crystal panel edge optical detection device, which comprises two groups of detection units arranged in left-right symmetry, a channel space 8 capable of allowing a detected panel 7 to pass horizontally and forward is arranged between the two groups of detection units, each group of detection units comprises a front camera 1, a front point light source 3, a back point light source 4 and a back camera 2 which are installed in a descending order of height, the lens of the front camera 1 faces downward and is directly opposite to the upper side edge of the detected panel 7 passing through the channel space 8, and a back light source 6 is further arranged above the front camera 1; the lens of the back camera 2 faces upward and is directly opposite to the lower side edge of the detected panel 7 passing through the channel space 8, and a front light source 5 is further arranged below the back camera 2.

[0034] Principle: During installation, the front camera 1, the back camera 2, the front point light source 3, the back point light source 4, the front light source 5 and the back light source 6 can be independently installed on the fixed structure on site or integrally installed by using a support body to form the positional relationship defined in the application. When the cell product is detected at the edge of the liquid crystal panel in the cell production process, the detected panel 7 is horizontally placed and passes through the channel space 8, the application can be fixed, the mechanical hand can grab the detected panel 7 to move horizontally, or the mechanical hand can grab the detected panel 7 to be fixed, and the application can move horizontally as a whole. The front point light source 3 and the back point light source 4 light up the surface of the product, so that the front camera 1 and the back camera 2 can shoot clear images; the front light source 5 lights up the shooting background of the front camera 1, and the back light source 6 lights up the shooting background of the back camera 2, so that the shooting backgrounds of the front camera 1 and the back camera 2 have relatively uniform adjustable gray values, the contrast between the grinding area (the edge of the detected panel 7) and the background of the shot image is increased, the grinding area can be more easily distinguished, and the accuracy of the grinding size measurement is increased. The two groups of detection units have two front cameras 1 and two back cameras 2, the upper and lower surfaces of the two edges of the liquid crystal panel can be detected at one time, and the detection of one liquid crystal panel can be completed twice.

[0035] The application has the beneficial effects that: the front camera 1 and the back camera 2 of the two groups of detection units are simultaneously detected, the liquid crystal panel can pass through the channel space 8 horizontally, the operation is convenient, and the detection efficiency is improved; the front point light source 3 and the back point light source 4 light up the surface of the product, the front light source 5 and the back light source 6 light up the shooting background, the front camera 1 and the back camera 2 can shoot clear images, the contrast between the edge of the product and the background is increased, the accuracy of the image size measurement is improved, and defects are more easily distinguished.

[0036] Embodiment two:

[0037] In the above embodiments, the following improvements can also be made:

[0038] Further, the lens of the front camera 1 and the lens of the back camera 2 have the same projection area on the detected panel 7.

[0039] The above further scheme has the beneficial effect that the position of the detected panel 7 is easy to align during detection, and the image consistency is good; in addition, the images captured by the front camera 1 and the back camera 2 correspond to the same left and right positions of the detected panel 7, so it is easy to synthesize the stereoscopic image of the edge of the detected panel 7, and the defect position is easy to find.

[0040] Further, as shown in Figures 2-3 , the front camera 1 and the back camera 2 are staggered in the front-back direction of the channel space 8.

[0041] The above further scheme has the beneficial effect of avoiding mutual interference of the front camera 1 and the back camera 2.

[0042] Further, as shown in Figures 2-3 , the front point light source 3 and the back backlight source 6 are installed on the front camera 1, and the back point light source 4 and the front backlight source 5 are installed on the back camera 2.

[0043] The above further scheme has the beneficial effect that when adjusting the relative position of the front camera 1 and the back camera 2, the front point light source 3 and the back backlight source 6 move synchronously with the front camera 1, and the back point light source 4 and the front backlight source 5 move synchronously with the back camera 2, without affecting the image effect.

[0044] Further, each set of detection units further comprises a first linear slide 9, which is arranged horizontally perpendicular to the front-back direction of the channel space 8, and the front camera 1 and the back camera 2 are respectively installed on the moving end of the independent first linear slide 9.

[0045] Note: The fixed end of the first linear slide 9 can be used to install on an external fixed structure, or can be used to install on the moving end of the second linear slide 10. The moving end of the first linear slide 9 can drive the front camera 1 or the back camera 2 to vertically approach or move away from the detected panel 7 passing through the channel space 8.

[0046] The above further scheme has the beneficial effect that the horizontal position of the front camera 1 and the back camera 2 relative to the detected panel 7 is easy to adjust independently, and it is easy to adapt to the long side and short side of the detected panel 7 and different specifications.

[0047] Further, each set of detection units further comprises a second linear slide 10, which is arranged vertically, and the fixed end of each first linear slide 9 is connected to the moving end of one second linear slide 10, and the fixed end of the second linear slide 10 is installed on an external fixed structure.

[0048] Note: the external fixing structure can be a shell, which encloses each group of detection units, facilitating the overall installation and movement of the application, and the upper and lower inner bottom surfaces of the shell can be used as a shooting background, which is better than an indoor background; the external fixing structure can also be a support set according to the site, which can install each component in the relative position relationship defined by the application.

[0049] The beneficial effect of the above further scheme is that the height of the front camera 1 and the back camera 2 relative to the panel 7 to be detected can be adjusted independently, and the imaging effect can be adjusted.

[0050] Further, the front backlight 5 is a downward parallel light source.

[0051] The beneficial effect of the above further scheme is that the background can be fully brightened, and the background brightness uniformity is good.

[0052] Further, the back backlight 6 is an upward parallel light source.

[0053] The beneficial effect of the above further scheme is that the background can be fully brightened, and the background brightness uniformity is good.

[0054] Further, the front camera 1 and the back camera 2 are both 2K network port line array scanning cameras, and the 2K network port line array scanning cameras are equipped with telecentric lenses.

[0055] The beneficial effect of the above further scheme is that the high-precision requirement of size detection is realized, and within a certain object distance range, the image magnification obtained will not change with the change of the object distance, so that the size measurement accuracy is high.

[0056] In the description of the application, it should be understood that if the description of the orientation, direction or positional relationship appears, for example, "center", "lengthwise", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in the specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of understanding the application and simplifying the description, and therefore cannot be understood as indicating or implying that the part, element or whole indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0057] In addition, if there are order description words, such as "first", "second", etc., in the description, the use in the description is for the convenience of understanding or simplifying the description, for example, in order to distinguish a plurality of technical features of the same type or function, and it is necessary to mention separately, the description may use the way of prefix or suffix order description words to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0058] In the present application, if the structural relative action relationship description words are used, such as "mounting", "connecting", "connecting", "fixing" and the like, unless otherwise specified and limited, it should be understood in a broad sense. For example, "mounting", "connecting", "connecting" and the like can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements; "fixed" can be integrated fixed, or can be detachable fixed by fasteners; can be directly fixed, or can be fixed through an intermediate medium. For those skilled in the art, the specific meaning of the above description words in the present application can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0059] In the present application, if the description words containing the meaning of attachment or connection appear, such as the first feature "on" or "under" the second feature, unless otherwise specified and limited, it should not be understood as limited, for example, "on" or "under" can be that the first and second features are in direct contact, or the first feature and the second feature are indirectly in contact through an intermediate medium. For those skilled in the art, the specific meaning of the above description words in the present application can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0060] Further, the first feature "on", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0061] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments, examples and features of different embodiments, examples described in the specification can be combined and combined by those skilled in the art without contradiction, which should be included in the scope of the present application.

[0062] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of information available to them, in combination with the technical inspiration given in the present application document.

Claims

1. A liquid crystal panel edge optical inspection apparatus, characterized by: The detection device comprises two groups of detection units arranged symmetrically left and right, a passage space (8) for allowing the detected panel (7) to pass horizontally forward is arranged between the two groups of detection units; each group of detection units comprises a front camera (1), a front point light source (3), a back point light source (4) and a back camera (2) arranged in sequence from high to low, the lens of the front camera (1) faces downward and is opposite to the upper side edge of the detected panel (7) passing through the passage space (8), a back light source (6) is further arranged above the front camera (1); the lens of the back camera (2) faces upward and is opposite to the lower side edge of the detected panel (7) passing through the passage space (8), a front light source (5) is further arranged below the back camera (2); The projection areas of the lens of the front camera (1) and the lens of the back camera (2) on the detected panel (7) are same; The front camera (1) and the back camera (2) are staggered along the front-rear direction of the passage space (8); the front light source (5) is a downward parallel light source; the back light source (6) is an upward parallel light source.

2. The liquid crystal panel edge optical inspection apparatus according to claim 1, characterized by: The front point light source (3) and the back light source (6) are installed on the front camera (1).

3. The liquid crystal panel edge optical inspection apparatus according to claim 1, wherein: The back point light source (4) and the front light source (5) are installed on the back camera (2).

4. The liquid crystal panel edge optical inspection apparatus according to claim 1, characterized by: Each group of detection units further comprises a first linear slide (9) arranged horizontally and perpendicularly to the front-rear direction of the passage space (8), the front camera (1) and the back camera (2) are respectively installed on the moving end of the independent first linear slide (9).

5. The liquid crystal panel edge optical inspection apparatus according to claim 4, wherein: Each group of detection units further comprises a second linear slide (10) arranged vertically, the fixed end of each first linear slide (9) is connected to the moving end of one second linear slide (10), and the fixed end of the second linear slide (10) is installed on an external fixed structure.

6. The liquid crystal panel edge optical inspection apparatus of claim 1, wherein: The front camera (1) and the back camera (2) are both 2K network port line array scanning cameras, and the 2K network port line array scanning cameras are equipped with telecentric lenses.

Images