CN213239943U - Visual detection system - Google Patents
Visual detection system Download PDFInfo
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- CN213239943U CN213239943U CN202021558620.4U CN202021558620U CN213239943U CN 213239943 U CN213239943 U CN 213239943U CN 202021558620 U CN202021558620 U CN 202021558620U CN 213239943 U CN213239943 U CN 213239943U
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Abstract
The utility model discloses a visual detection system, which comprises a controller, the line array camera, the transmission platform, light source and spectroscope, the display panel is placed for the level to the transmission platform, and the transmission platform is used for driving display panel uniform velocity motion, the spectroscope slope sets up the top at the transmission platform, the light source sets up in the top of transmission platform and is located the one side that is close to terminal surface under the spectroscope, the line array camera sets up the top at the spectroscope, and its camera down, the light source has atomizing glass, the light source is used for sending the light that passes atomizing glass, and shine at the lower terminal surface of spectroscope, some light shines display panel's up end under the spectroscope after terminal surface reflection, reflect through the display panel up end again, and get into the line array camera after seeing through the spectroscope. This application has vaporific structure information through making the light that shines on display panel, improves the contrast of defect on the display panel, realizes the detection of display panel surface, POL membrane defect, is favorable to improving characteristic analysis's accuracy.
Description
Technical Field
The utility model relates to a visual detection technical field, in particular to visual detection system.
Background
In recent years, the global display panel industry has been developed rapidly, and domestic panel manufacturers represented by the kyoto, the huaxing and the tianma invest a lot of manpower and capital in the expansion of production scale and the upgrading of product manufacture, so as to make an active strategic arrangement for seizing the market share of the display panel. Along with the rapid improvement of the manufacturing capacity, the requirement of the corresponding product quality detection capability is more urgent, and the detection of the appearance defects of the display panel is an important link in the whole product manufacturing process and is often used as the basis for grading the product quality together with the lighting defect detection link.
At present, display panels are divided into two major categories, one is an LCD panel with a mature technology, namely a liquid crystal panel; one is an OLED panel with a technical comparison front end, and the market mainly includes an AMOLED panel. At present, most display panel products on the market use glass as a display substrate to carry out various display device installation processes, and a polarizing film and a reinforced cover plate glass are installed on the outermost layer of the display substrate, most appearance defect types are concentrated in the processes of installing the polarizing film and the reinforced cover plate glass, for example, the common POL defects are the bad problems generated in the polarizing film attaching process.
The POL type defects are very small in longitudinal dimension, and are substantially level with the normal region, which results in that the conventional bright field scattering light source completely unifies the defect region and the normal region in brightness, so that the final image has no defect feature region. In addition, wavelength components of white light are overlapped, and the imaging of a tiny object size after the tiny object size passes through the standard lens group generates noise, so that the imaging is not clear.
The glass substrate and the polarizing plate are characterized by specular reflection characteristics, and when a light source is turned on, about 10% of light energy is reflected to form a highlight region, and about 80% of light energy is transmitted into the glass and reflects surface information of the lower-layer POL film.
Based on the light path principle, the appearance detection optical system comprises a bright field and a dark field, wherein a bright field light source generally selects a visible light wave band, mainly white light is used, a black-and-white linear array camera is used for image acquisition, and relatively tiny POL defects in an image are basically difficult to capture, which is related to a light field with a white light source too flat. Some manufacturers try to match a color light source with a color camera to detect the target three-dimensional defect, so that the contrast of the POL defects is enhanced in practical application, and the problem that the characteristics of the tiny POL defects are still fuzzy and difficult to distinguish is solved, so that the corresponding characteristics are difficult to identify by an algorithm; the dark field has higher requirements on the incident angle of the light source and the collecting direction of the camera lens, and has conditional limitation on the detectable defect characteristics, so the method has objective difficulty in specific implementation in a standardized production line.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a visual detection system of defects such as detectable display panel surface damage, POL class defect, marginal burr, the technical scheme of adoption is:
a visual inspection system comprises a controller, a line camera, a transmission platform, a light source and a spectroscope, wherein the transmission platform is used for horizontally placing a display panel, the transmission platform is used for driving the display panel to move at a constant speed, the spectroscope is obliquely arranged above the transmission platform, the light source is arranged above the transmission platform and positioned at one side close to the lower end surface of the spectroscope, the linear array camera is arranged above the spectroscope, and the camera of the light source faces downwards, the light source is provided with atomizing glass and is used for emitting light rays passing through the atomizing glass, and the light irradiates on the lower end face of the spectroscope, part of the light is reflected by the lower end face of the spectroscope and then irradiates on the upper end face of the display panel, is reflected by the upper end face of the display panel, and enters the linear array camera after penetrating through the spectroscope.
Preferably, the light source includes the bar cell body and along the fore-and-aft direction horizontal installation the light emitting component of the bar in the bar cell body, the bar cell body sets up along the fore-and-aft direction level the spectroscope is close to one side of its lower extreme, and its notch orientation the spectroscope, atomized glass is in along the vertical setting of fore-and-aft direction the notch department of bar cell body, light that light emitting component sent passes atomized glass shines behind the spectroscope the lower terminal surface of spectroscope.
Preferably, the light source is still including installing spotlight grating and spotlight stick in the bar cell body, gather the light stick along fore-and-aft direction horizontal distribution, just gather the upper and lower both sides of light stick respectively with both sides inner wall contact about the bar cell body, the spotlight grating is bar platelike structure, spotlight grating along fore-and-aft direction vertical distribution in the bar cell body, and its upper and lower both ends respectively with both sides inner wall contact about the bar cell body, just spotlight grating is located spotlight stick is close to one side of atomizing glass, the light that light-emitting component sent warp gather into and pass behind the collimation light along fore-and-aft direction horizontal distribution with spotlight grating gathers and passes behind the atomizing glass jet out extremely outside the bar cell body.
Preferably, the spotlight grating includes the planoconvex lens of light-passing board and a plurality of bars, the light-passing board is along the vertical installation of fore-and-aft direction in the bar cell body, and its upper and lower both ends respectively with the upper and lower both sides inner wall contact of bar cell body, it is a plurality of the planoconvex lens is planar one side vertical installation respectively the light-passing board is close to one side of bar cell body notch, and a plurality of the planoconvex lens is in along the even distribution in fore-and-aft direction interval on the light-passing board.
Preferably, the light emitting element is a monochromatic light emitting element.
Preferably, the light emitting element is a near-infrared light emitting element.
Preferably, the line camera is a black and white line camera.
Preferably, the beam splitter is at an angle of 45 ° to the horizontal.
The light source sends light, so that the process shine behind the vaporific structure information that the light that the spectroscope was reflected carried atomizing glass surface display panel up end, get into behind the light that display panel reflection has vaporific structure information linear array camera, so that the image that linear array camera obtained is more three-dimensional, improves the contrast of defect on the display panel, is favorable to improving characteristic analysis's the degree of accuracy, reduces characteristic analysis's the degree of difficulty.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram of a vision inspection system according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a vision inspection system according to an embodiment of the present invention;
fig. 3 is an exploded view of a structure of a light source according to an embodiment of the present invention;
fig. 4 is a schematic view of a partial structure of a light-gathering grating according to an embodiment of the present invention.
The specific meanings of the reference numerals are:
1. a line camera; 2. a transmission platform; 3. a light source; 31. atomizing glass; 32. a strip-shaped groove body; 33. a light emitting element; 34. a light-gathering grating; 341. a light-transmitting plate; 342. a plano-convex lens; 35. a light-gathering rod; 4. a beam splitter.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-4, the examples given are intended to illustrate the present invention and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-4, an embodiment of the present invention is provided, where the embodiment includes a controller (not shown in the figure), a line camera 1, a transmission platform 2, a light source 3 and a spectroscope 4, the transmission platform 2 is used for horizontally placing a display panel, the transmission platform 2 is used for driving the display panel to move at a constant speed, the spectroscope 4 is obliquely disposed above the transmission platform 2, the light source 3 is disposed above the transmission platform 2 and located at a side close to a lower end face of the spectroscope 4, the line camera 1 is disposed above the spectroscope 4 with its camera facing down, the light source 3 has an atomized glass 31, the light source 3 is used for emitting light passing through the atomized glass 31 and irradiating on the lower end face of the spectroscope 4, and a part of the light irradiates on the upper end face of the display panel after being reflected by the lower end face of the spectroscope 4, and then reflected by the upper end surface of the display panel and enters the linear array camera 1 after passing through the spectroscope 4.
The light source 3 sends and passes atomizing glass 31's light to make the light of shining terminal surface under the spectroscope 4 carry atomizing structure information of atomizing glass 31 surface atomizing film, and some light that has atomizing structure information shines after being reflected on display panel, and the reverberation shines respectively behind display panel's the surface on display panel's reflection glass and the POL membrane by the reflection again, and the light that display panel reflection has atomizing structure sees through enter behind the spectroscope 4 linear array camera 1, linear array camera 1 gathers the image and sends to the controller.
This application makes through making the light that shines on display panel have vaporific structure information the image that linear array camera 1 obtained is more three-dimensional, improves the contrast of defect on the display panel, realizes the detection of display panel surface damage, POL class defect, is favorable to improving characteristic analysis's the degree of accuracy, reduces characteristic analysis's the degree of difficulty.
Preferably, light source 3 includes strip cell body 32 and along fore-and-aft direction horizontal installation the light emitting component 33 of the strip in the strip cell body 32, strip cell body 32 sets up along the fore-and-aft direction level spectroscope 4 is close to one side of its lower extreme, and its notch orientation spectroscope 4, atomized glass 31 is in along the vertical setting of fore-and-aft direction the notch department of strip cell body 32, the light that light emitting component 33 sent passes atomized glass 31 back irradiation is in the lower terminal surface of spectroscope 4.
The light emitting element 33 emits linear light distributed along the front-back direction, and the transmission platform 2 is used for driving the display panel to horizontally move along the left-right direction, so that the light beam emitted by the light emitting element 33 completes the visual detection of the upper end face of the display panel.
The atomization glass 31 enables the light emitted by the light-emitting element 33 to have atomization structural characteristics, and the light irradiates the display panel and is reflected to present a three-dimensional effect, so that the defect characteristics of the glass surface and the POL film can be easily distinguished during visual detection of the display panel.
Preferably, the light source 3 is still including installing spotlight grating 34 and spotlight stick 35 in the bar cell body 32, spotlight stick 35 is along fore-and-aft direction horizontal distribution, just the upper and lower both sides of spotlight stick 35 respectively with both sides inner wall contact about the bar cell body 32, spotlight grating 34 is bar platelike structure, spotlight grating 34 is along fore-and-aft direction vertical distribution in the bar cell body 32, and its upper and lower both ends respectively with both sides inner wall contact about the bar cell body 32, just spotlight grating 34 is located spotlight stick 35 is close to one side of atomizing glass 31, the light warp that light emitting component 33 sent spotlight stick 35 with spotlight grating 34 assembles into and passes after the collimated light of following fore-and-aft direction horizontal distribution atomizing glass 31 jet out extremely outside the bar cell body 32.
The light source 3 emits collimated light to the spectroscope 4, and the collimated light is reflected by the spectroscope 4 and then irradiates the surface of the display panel, so that the light emitted by the light source 3 uniformly irradiates a narrow band area on the display panel, which is different from a large-area uniform band of diffuse light.
The spectroscope 4 is obliquely arranged on the strip-shaped groove body 32 and is positioned at a position close to the notch of the strip-shaped groove body 32, and the scattered light emitted by the light-emitting element 33 is converged by the condensing grating 34 and the condensing rod 35, so that the collimation of the light emitted by the light source 3 is ensured.
As shown in fig. 2, grooves matched with the shapes of the light-gathering grating 34 and the light-gathering rod 35 are respectively formed in the upper and lower groove walls of the strip-shaped groove body 32, and the upper and lower sides of the light-gathering grating 34 and the light-gathering rod 35 respectively extend into the corresponding grooves, so that the light-gathering grating 34 and the light-gathering rod 35 are installed in the strip-shaped groove body 32.
Preferably, the light-gathering grating 34 includes the planoconvex lens 342 of light-transmitting board 341 and a plurality of bars, light-transmitting board 341 is vertical along the fore-and-aft direction and installs in the bar cell body 32, and its upper and lower both ends respectively with the upper and lower both sides inner wall contact of bar cell body 32 is a plurality of planoconvex lens 342 is planar one side vertical installation respectively light-transmitting board 341 is close to one side of bar cell body 32 notch, and is a plurality of planoconvex lens 342 is in the even distribution in front and back direction interval on the light-transmitting board 341.
In this embodiment, the transparent plate 341 is made of acrylic glass material, and the converging effect is good.
Preferably, the light emitting element 33 is a monochromatic light emitting element,
the monochromatic light is superior to white light in the detail resolution capability of imaging, and the accuracy of visual detection is improved.
Preferably, the light emitting element 33 is a near-infrared light emitting element.
The ability that the light of near-infrared wave band shines the POL membrane through the reflection glass of display panel is stronger to make the reflection light show more the reflection of POL membrane internal detail, and have more advantage on the detail differentiation of micron level, be favorable to improving the accuracy of visual detection.
Preferably, the line camera 1 is a black and white line camera 1.
The common black-and-white line array camera 1 can be used for collecting images, and the visual detection cost is reduced. Taking the DALSA line camera 1 as an example, the sensitivity curve of its sensor element in the spectral band indicates that the series of cameras still have excellent sensitivity in the spectral line interval of the 850nm band.
Preferably, the beam splitter 4 forms an angle of 45 ° with the horizontal plane.
The incident light and the reflected light of the display panel are on a vertical surface, so that the horizontal edge and the vertical height of a target of the display panel cannot generate light and shadow interference, and the defect detection of the edge area of the panel is facilitated.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a visual detection system, its characterized in that, includes controller, linear array camera (1), transmission platform (2), light source (3) and spectroscope (4), be used for the level to place display panel on transmission platform (2), just transmission platform (2) are used for driving display panel moves at the uniform velocity, spectroscope (4) slope sets up the top of transmission platform (2), light source (3) set up the top of transmission platform (2) and be located and be close to one side of spectroscope (4) terminal surface down, linear array camera (1) sets up in the top of spectroscope (4), and its camera down, light source (3) have atomizing glass (31), light source (3) are used for sending and pass the light of atomizing glass (31) to shine in the lower terminal surface of spectroscope (4), some light warp shine after spectroscope (4) lower terminal surface reflection display panel's up end surface And then reflected by the upper end surface of the display panel and enters the linear array camera (1) after passing through the spectroscope (4).
2. The visual inspection system according to claim 1, wherein the light source (3) comprises a strip-shaped groove body (32) and a strip-shaped light-emitting element (33) horizontally installed in the strip-shaped groove body (32) along the front-back direction, the strip-shaped groove body (32) is horizontally arranged on one side, close to the lower end of the spectroscope (4), of the spectroscope (4) along the front-back direction, the notch of the spectroscope (4) faces the spectroscope (4), the atomized glass (31) is vertically arranged at the notch of the strip-shaped groove body (32) along the front-back direction, and light emitted by the light-emitting element (33) passes through the atomized glass (31) and then irradiates the lower end face of the spectroscope (4.
3. The visual inspection system of claim 2, wherein the light source (3) further comprises a light-gathering grating (34) and a light-gathering rod (35) which are installed in the strip-shaped groove body (32), the light-gathering rod (35) is horizontally distributed along the front-back direction, the upper side and the lower side of the light-gathering rod (35) are respectively in contact with the inner walls of the upper side and the lower side of the strip-shaped groove body (32), the light-gathering grating (34) is of a strip-shaped plate-shaped structure, the light-gathering grating (34) is vertically distributed in the strip-shaped groove body (32) along the front-back direction, the upper end and the lower end of the light-gathering rod are respectively in contact with the inner walls of the upper side and the lower side of the strip-shaped groove body (32), the light-gathering grating (34) is located on one side of the light-gathering rod (35) close to the atomized glass (31), and light emitted by the light-gathering rod (35) and the light-gathering grating (34) And is discharged out of the strip-shaped groove body (32).
4. The visual inspection system of claim 3, wherein the light-gathering grating (34) comprises a light-transmitting plate (341) and a plurality of strip-shaped plano-convex lenses (342), the light-transmitting plate (341) is vertically installed in the strip-shaped groove body (32) along the front-back direction, the upper end and the lower end of the light-transmitting plate are respectively contacted with the inner walls of the upper side and the lower side of the strip-shaped groove body (32), one side of the plano-convex lenses (342) which is a plane is vertically installed on one side of the light-transmitting plate (341) close to the notch of the strip-shaped groove body (32), and the plurality of plano-convex lenses (342) are evenly distributed on the light-transmitting plate (341) along the front-back.
5. A visual inspection system according to claim 3, wherein the light emitting element (33) is a monochromatic light emitting element.
6. The visual inspection system of claim 5, wherein the light emitting element (33) is a near infrared light emitting element.
7. A visual inspection system as claimed in claim 6, wherein said line camera (1) is a black and white line camera (1).
8. The visual inspection system according to any one of claims 1-7, wherein the beam splitter (4) is angled at 45 ° to the horizontal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021558620.4U CN213239943U (en) | 2020-07-31 | 2020-07-31 | Visual detection system |
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| CN202021558620.4U CN213239943U (en) | 2020-07-31 | 2020-07-31 | Visual detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7629238B1 (en) | 2024-01-15 | 2025-02-13 | 株式会社アヤハエンジニアリング | Line camera viewpoint adjustment reference sample, uniform viewpoint adjustment device, and uniform viewpoint adjustment method |
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2020
- 2020-07-31 CN CN202021558620.4U patent/CN213239943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7629238B1 (en) | 2024-01-15 | 2025-02-13 | 株式会社アヤハエンジニアリング | Line camera viewpoint adjustment reference sample, uniform viewpoint adjustment device, and uniform viewpoint adjustment method |
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