CN110031480A - The upper surface of light guide plate pattern detection device - Google Patents
The upper surface of light guide plate pattern detection device Download PDFInfo
- Publication number
- CN110031480A CN110031480A CN201810427049.3A CN201810427049A CN110031480A CN 110031480 A CN110031480 A CN 110031480A CN 201810427049 A CN201810427049 A CN 201810427049A CN 110031480 A CN110031480 A CN 110031480A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light guide
- lighting device
- image capturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8809—Adjustment for highlighting flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8835—Adjustable illumination, e.g. software adjustable screen
Abstract
The present invention provides a kind of the upper surface of light guide plate pattern detection device comprising: light guide plate, with following formation pattern, and forms transparent material plasma membrane above described and between following above；Lighting device is set to the side with the upper surface of the light guide plate virtual vertical plane at right angle；Image capturing portion is correspondingly arranged in the other side and the lighting device of the vertical plane.The light of the light guide plate is exposed to further away from light source and scattered radiation from the lighting device, the light irradiated from the lighting device is incident upon the image capturing portion from the light conducting board from deformation, and the light reflected from the upper surface of light guide plate is only obtained in the image that the image capturing portion obtains.
Description
Technical field
The present invention relates to the upper surface of light guide plate pattern detection devices, are more particularly to one kind in light guide plate (Light Guide
Panel) in technique, bad and surface state the detection device of optical detection patterns is utilized.
Background technique
In general, light guide plate refers to purely by polymethyl methacrylate (PMMA:Poly Methyl Meth
Acryla te) resin manufacture transparent acrylic panel, the upper surface of light guide plate formed pattern, form protrusion in its lower section
(Lenti), protection sheet is adhered on the face for be formed with protrusion.
Also, it is existing leaded light board checking device light guide plate above, lighting device press with above light guide plate at certain angle
Degree configuration, light are injected above light guide plate by certain angle, and relative to the upper surface of light guide plate, image capturing portion is matched by certain angle
It sets.
At this point, lighting device irradiate light guide plate, the light from the upper surface of light guide plate and below reflection.
That is, the light of the lighting device is penetrated along light guide plate draw above case to inside, the light penetrated is formed in
The image of the pattern of lower part and reflex to top again, thus, image capturing portion obtain.
It is acquired as a result, because being formed in the foreign matter of lower part, scratch in image capturing portion, and exists and be difficult to differentiate between light guide plate
Top, lower part part the problem of.
Accordingly, it is difficult to only be identified to the processing graphic pattern being formed in above light guide plate.So truth is to need to research and develop one
Kind is not influenced by the pattern and protection sheet that are formed in lower part, and is capable of the detection device for only detecting light guide plate draw above case.
Summary of the invention
Technical problems to be solved by the inivention
The present invention is for solving the above problems, its purpose is that providing a kind of the upper surface of light guide plate pattern detection device, only
Light guide plate draw above picture is obtained, and can accurately detect the unfavorable condition for being formed in light guide plate draw above case.
But the purpose of the present invention is limited not by the purpose mentioned, does not mention or other purposes pass through following record
And it is expressly understood that those skilled in the art.
Technical teaching for solving the problem was
In order to realize the purpose, the present invention includes: light guide plate, above with following formation pattern, and above described
With it is following between formed transparent material plasma membrane；Lighting device is set at right angle virtual vertical with the upper surface of the light guide plate
The side in face；Image capturing portion is correspondingly arranged in the other side and the lighting device of the vertical plane.
Also, a kind of the upper surface of light guide plate pattern detection device is provided, exposes to the light guide plate from the lighting device
Light with remoter from light source and in diverging in the form of irradiate, from the lighting device irradiate light become in the light guide plate
Shape, and it is incident upon the image capturing portion, the image obtained from the image capturing portion is only obtained to be reflected from the upper surface of light guide plate
Light.
Moreover, from a part of light in the light that the light source of the lighting device is incident upon the light guide plate to be less than critical angle
Mode inject above, be incident upon as a result, by reflecting above in the following, the light of the injection is after following reflection, by upper
Face and inject image capturing portion.
Also, in the light that the light source by the lighting device is injected, the light other than a part of light is because big
In critical angle, and after the total reflection of the upper surface of described light guide plate, the image capturing portion is injected.
Moreover, having the upper surface of described light guide plate of injection for being breaking at from the light that the light source irradiates and incidence angle
The disconnecting device for spending the light injected in a manner of being less than critical angle, the light for being incident upon the image capturing portion as a result, is from leaded light
The light of the upper surface of plate total reflection is incident upon the image capturing portion.
Also, lighting device is configured, so that the light cut off by the disconnecting device is from the entire light that light source irradiates
No more than 1/3.
Moreover, the disconnecting device includes: end edge, it is set between the lighting device and light guide plate, enters described in cutting
Firing angle degree is less than the light of critical angle injected；Two braced frames are arranged in the two sides of the end edge by short transverse.
Also, the position for the position that the end edge adjusts end edge by upper and lower transfer is driven in braced frame configuration
Device.
It is further preferred that the end edge configures 1/3 fulcrum in the upper surface of described light guide plate between lighting device.
Feature and advantage of the invention by referring to accompanying drawing below illustrate and become more than you know.
To sum up, the term or word that this specification and claims range uses not press the commonly meaning solution with dictionary
It releases, but inventor is used to illustrate in most preferred method the principle of its invention based on the appropriate concept for defining term, passes through
Meet the meaning and concept explanation of technical idea of the invention.
The effect of invention
To sum up shown in explanation, the present invention is had the following effects that, only injects the light reflected from light guide plate draw above case, shooting
Be formed in light guide plate draw above case, thereby, it is possible to accurately detect be formed in light guide plate draw above case it is bad whether.
Detailed description of the invention
Fig. 1 is the attached drawing of the existing guide-lighting board checking device of display；
Fig. 2 is that display is attached with following image above by existing guide-lighting board checking device shooting overlapping shooting
Figure；
Fig. 3 is the attached drawing of the upper surface of display light guide plate of the invention pattern detection device；
Fig. 4 is that the upper surface of the light guide plate of display through the invention pattern detection device shoots and only shoots image above
Attached drawing；
Fig. 5 is the attached drawing of the brief configuration of display position driving device of the invention.
Description of symbols
10: light guide plate 11: pattern above
12: lower part pattern 13: protection sheet
20: lighting device 30: image capturing portion
40: end edge 41: inclined surface
Specific embodiment
In the following, being illustrated referring to attached drawing to a preferred embodiment of the present invention.In this process, line shown in the drawings
Thickness or the size etc. of constituent element carry out exaggeration with facilitating for being illustrated of illustrate and show.
Also, term described below is the term defined based on the function in the present invention, because of user, transports user's
It is intended to or convention and difference.Therefore, the content to the definition of the term based on this specification and define.
Moreover, the following examples and non-limiting scope of the presently claimed invention, claim model only of the invention
The illustration item for enclosing the constituent element of proposition, is contained in the technical idea of the whole instruction of the invention, in scope of the claims
Constituent element in, the embodiment of the constituent element comprising that can replace as coordinate is contained in claim of the invention
Range.
Attached drawing 3 is the attached drawing of the upper surface of display light guide plate of the invention pattern detection device, and Fig. 4 is to show through the invention
The upper surface of light guide plate pattern detection device and shoot and only shoot the attached drawing of image above, Fig. 5 is display position of the invention
Set the attached drawing of the brief configuration of driving device.
The upper surface of light guide plate of the invention pattern detection device unidirectionally moves light guide plate by conveying device (not shown)
Period, image capturing portion and illumination portion are detected by the received image of institute and are led to irradiation light above light guide plate by certain angle
It whether there is defect above tabula rasa.
Also, in light guide plate (Light Guide Panel) technique, utilize the bad and surface shape of optical detection patterns
State it is bad.
That is, its purpose is that provide it is a kind of only obtain light guide plate draw above picture, and can accurately detect and be formed in light guide plate
The upper surface of undesirable light guide plate of draw above case pattern detection device.
As shown in figure 3, the detection device includes light guide plate 10, above with following formation pattern, above described with
Transparent material plasma membrane is formed between below；Lighting device 20, is arranged in and the upper surface of the light guide plate 10 is at right angle virtual hangs down
Face the side of M directly；Image capturing portion 30, it is corresponding with the lighting device 20 in the other side of the vertical plane M.
Also, from the lighting device 20 expose to the light of the light guide plate 10 further away from light source and and shone in divergence form
It penetrates, the light irradiated from the lighting device 20 injects the image capturing portion 30 by the light conducting board from deformation, in the image
The image that acquisition unit 30 obtains only obtains the light reflected from the upper surface of light guide plate 10.
Moreover, the lighting device 20 light source be incident upon the light guide plate 10 light in a part light to be less than
The mode of critical angle is injected above, is reflected and is incident upon in the following, the light of the injection is by following reflection from above as a result,
Afterwards, image capturing portion 30 is injected and above.
Also, in the light that the light source by the lighting device 20 is injected, light other than a part of light because
The image capturing portion 30 is injected after the total reflection of the upper surface of described light guide plate 10 greater than critical angle.
That is, the incidence angle of the light exposed to above the light guide plate 10 has the light transmission section A less than critical angle, greater than facing
The total reflection interval B at boundary angle.
Also, critical angle refers to when light injects the interface of two different media of refractive index, is all reflected, and rolled over
The light penetrated is completely absent incidence angle.
Therefore, incidence angle be less than critical angle light transmission section A light penetrated along 10 draw above case 11 of light guide plate to
Inside, the light penetrated by the pattern 12 for being formed in lower part image and reflex to top again, thus, in image capturing portion
30 obtain.
Also, the light that incidence angle is greater than the total reflection interval B of critical angle does not penetrate above light guide plate 10, and by all anti-
It penetrates.
The upper surface of described light guide plate 10 is incident upon from the light that the light source irradiates for being breaking at moreover, having, and
The disconnecting device for the light that incident angle is launched into less than critical angle, the light for being incident upon the image capturing portion 30 is from light guide plate
The light emission of the upper surface of 10 total reflections enters the image capturing portion 30.
Also, lighting device 20 is configured, by the light cut off by the disconnecting device with entire what is irradiated from light source
It is no more than 1/3 in light.
That is, having the cutting greater than critical angle for the incidence angle setting that will expose to the light above the light guide plate 10 to fill
It sets.
Therefore, cutting only obtains 10 draw above picture of light guide plate through the light to the lower part of light guide plate 10 as a result, thus,
The bad situation for being formed in 10 draw above case 11 of light guide plate can accurately be detected.
Also, the disconnecting device includes: end edge 40, between the lighting device 20 and light guide plate 10, cuts off institute
State the light that incident angle is launched into less than critical angle；The end edge 40 is arranged in by short transverse in two braced frames 50
Two sides.
That is, the end edge 40 is set between the lighting device 20 and light guide plate 10 and cuts off the light transmission section A's
Light.
Also, the end edge 40, which has, to be tilted by predetermined angular and is cut off the inclined surface 41 of light, and the inclined surface 41 is from tool
There is a side of the lighting device 20 to tilt down configuration to another side direction with the image capturing portion 30.
It is further preferred that the end edge 40 configures 1/3 in the upper surface of described light guide plate 10 between lighting device
Point.
In addition, in the braced frame 50 there is the position for the position transferred the end edge 40 up and down and adjust end edge 40 to drive
Dynamic device.
Also, the position driving device includes: upper and lower shifting rod 61, forms screw thread by length direction in one side；It drives
Dynamic component 62 is rotated for engaging with the screw thread of the shifting rod 61 up and down；The end edge is connected to institute by bracket 63
State shifting rod 61 up and down；Limiter (not shown) is fixed on the position of the shifting rod 61 up and down.
To sum up, the present invention is illustrated by specific embodiment, but it is used to illustrate the present invention, this
Invention is not limited to this, can be deformed or be changed by those skilled in the art in the technological thought of the present invention
It is good.
Simple deformation of the invention and change belong to the scope of the present invention, and specific protection scope of the invention is according to power
Sharp claimed range and define.
Claims (7)
1. a kind of the upper surface of light guide plate pattern detection device, which is characterized in that
Include:
Light guide plate, with following formation pattern, and forms transparent material plasma membrane above described and between following above；
Lighting device is set to the side with the upper surface of the light guide plate virtual vertical plane at right angle；
Image capturing portion is correspondingly arranged in the other side and the lighting device of the vertical plane；
The light for exposing to the light guide plate from the lighting device is irradiated further away from light source in scattering form,
The light irradiated from the lighting device is incident upon the image capturing portion in the light conducting board from deformation,
The light reflected from the upper surface of light guide plate is only obtained in the image that the image capturing portion obtains.
2. the upper surface of light guide plate according to claim 1 pattern detection device, which is characterized in that
A part of light in the light that the light source by the lighting device is incident upon the injection of the light guide plate is because critical to be less than
The mode at angle inject above and reflected from above and be incident upon in the following, and in the light of the injection after following reflection, pass through
It is incident upon image capturing portion above,
In the light that the light source by the lighting device is injected, light other than the light of described a part faces because being greater than
Boundary angle and from the upper surface of described light guide plate total reflection after, inject the image capturing portion.
3. the upper surface of light guide plate according to claim 2 pattern detection device, which is characterized in that
With disconnecting device, with the upper surface of described light guide plate of injection for being breaking at from the light that the light source irradiates and incident
The light that angle is launched into less than critical angle,
The light for injecting the image capturing portion is to be incident upon the image capturing portion from the light that the upper surface of light guide plate is totally reflected.
4. the upper surface of light guide plate according to claim 3 pattern detection device, which is characterized in that
Lighting device is configured, so that the light cut off by the disconnecting device is being no more than 1/3 from the entire light that light source irradiates.
5. the upper surface of light guide plate according to claim 4 pattern detection device, which is characterized in that
The disconnecting device includes:
End edge cuts off the light that the incident angle is launched into less than critical angle between the lighting device and light guide plate；
Two braced frames, the two sides of the end edge are arranged in by short transverse.
6. the upper surface of light guide plate according to claim 5 pattern detection device, which is characterized in that
There is the position driving device for the position transferred the end edge up and down and adjust end edge in the braced frame.
7. the upper surface of light guide plate according to claim 6 pattern detection device, which is characterized in that
The end edge configures 1/3 fulcrum in the upper surface of described light guide plate between lighting device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020180003730A KR102020877B1 (en) | 2018-01-11 | 2018-01-11 | Top pattern inspection device of light guide plate |
| KR10-2018-0003730 | 2018-01-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110031480A true CN110031480A (en) | 2019-07-19 |
| CN110031480B CN110031480B (en) | 2021-11-30 |
Family
ID=67234881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810427049.3A Active CN110031480B (en) | 2018-01-11 | 2018-05-07 | Upper pattern detection device of light guide plate |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR102020877B1 (en) |
| CN (1) | CN110031480B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261408A (en) * | 2019-07-30 | 2019-09-20 | 云谷（固安）科技有限公司 | Display module defect detecting device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005233695A (en) * | 2004-02-17 | 2005-09-02 | Sumitomo Osaka Cement Co Ltd | Flaw inspection device for transparent panel |
| CN101086540A (en) * | 2007-07-20 | 2007-12-12 | 友达光电股份有限公司 | Light conducting board |
| JP2009264746A (en) * | 2008-04-21 | 2009-11-12 | Nikon Corp | Defect detection device |
| KR20120075133A (en) * | 2010-12-28 | 2012-07-06 | 엘지디스플레이 주식회사 | Apparatus and method of testing pattern in light guide plate |
| CN104100879A (en) * | 2013-04-08 | 2014-10-15 | Hb技术有限公司 | Back light unit |
| WO2016188378A1 (en) * | 2015-05-24 | 2016-12-01 | 上海微电子装备有限公司 | Measurement device and measurement method for thin film provided with transparent substrate |
| CN106441655A (en) * | 2016-09-18 | 2017-02-22 | 北京杰福科技有限公司 | Glass surface stress detecting device |
| CN107567584A (en) * | 2015-05-04 | 2018-01-09 | Asml荷兰有限公司 | Method and apparatus for checking and measuring |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010055184A (en) * | 1999-12-09 | 2001-07-04 | 구자홍 | Optics apparatus for pattern inspection of pdp glass |
-
2018
- 2018-01-11 KR KR1020180003730A patent/KR102020877B1/en active IP Right Grant
- 2018-05-07 CN CN201810427049.3A patent/CN110031480B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005233695A (en) * | 2004-02-17 | 2005-09-02 | Sumitomo Osaka Cement Co Ltd | Flaw inspection device for transparent panel |
| CN101086540A (en) * | 2007-07-20 | 2007-12-12 | 友达光电股份有限公司 | Light conducting board |
| JP2009264746A (en) * | 2008-04-21 | 2009-11-12 | Nikon Corp | Defect detection device |
| KR20120075133A (en) * | 2010-12-28 | 2012-07-06 | 엘지디스플레이 주식회사 | Apparatus and method of testing pattern in light guide plate |
| CN104100879A (en) * | 2013-04-08 | 2014-10-15 | Hb技术有限公司 | Back light unit |
| CN107567584A (en) * | 2015-05-04 | 2018-01-09 | Asml荷兰有限公司 | Method and apparatus for checking and measuring |
| WO2016188378A1 (en) * | 2015-05-24 | 2016-12-01 | 上海微电子装备有限公司 | Measurement device and measurement method for thin film provided with transparent substrate |
| CN106441655A (en) * | 2016-09-18 | 2017-02-22 | 北京杰福科技有限公司 | Glass surface stress detecting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261408A (en) * | 2019-07-30 | 2019-09-20 | 云谷（固安）科技有限公司 | Display module defect detecting device and method |
| CN110261408B (en) * | 2019-07-30 | 2021-11-23 | 云谷（固安）科技有限公司 | Display module defect detection device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190085634A (en) | 2019-07-19 |
| KR102020877B1 (en) | 2019-09-11 |
| CN110031480B (en) | 2021-11-30 |
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