CN101688942A - Method for inspecting stain in polarizer due to uneven dyeing and automatic inspection system using the same - Google Patents
Method for inspecting stain in polarizer due to uneven dyeing and automatic inspection system using the same Download PDFInfo
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- CN101688942A CN101688942A CN200980000492A CN200980000492A CN101688942A CN 101688942 A CN101688942 A CN 101688942A CN 200980000492 A CN200980000492 A CN 200980000492A CN 200980000492 A CN200980000492 A CN 200980000492A CN 101688942 A CN101688942 A CN 101688942A
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- 238000004043 dyeing Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 13
- 238000007689 inspection Methods 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract 2
- 238000002360 preparation method Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 10
- 239000000975 dye Substances 0.000 description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 238000010191 image analysis Methods 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- PICXIOQBANWBIZ-UHFFFAOYSA-N zinc;1-oxidopyridine-2-thione Chemical class [Zn+2].[O-]N1C=CC=CC1=S.[O-]N1C=CC=CC1=S PICXIOQBANWBIZ-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
There is provided an automatic inspection system for inspecting stains in a polarizing plate due to uneven dyeing, the automatic inspection system including a light source; an inspection unit positioned in the front of the light source and including at least two reference polarizing plates whose polarizing axes are arranged in parallel with each other and an objective polarizer or objective polarizing plate positioned between the reference polarizing plates and arranged so that the polarizing axis of the objective polarizer or objective polarizing plate is orthogonal to the polarizing axes ofthe reference polarizing plates; an imaging unit taking a picture of the inspection unit to collect image data; and an arithmetic operation unit analyzing the image data collected in the imaging unitto determine whether the objective polarizer or objective polarizing plate is inferior.
Description
Technical field
The present invention relates to a kind of automatic checkout system that is used to detect the stain in polarizer that causes by uneven dyeing, more specifically, relate to a kind of automatic checkout system that is used to detect stain in polarizer, this automatic checkout system is designed to: by quantitative stain in polarizer so that objective examination criteria to be provided, and on production line, automatically detect the stain of Polarizer, thereby product quality is consistent and enhances productivity.
Background technology
Polarizer refers to the optical device that is used for producing polarized light on a certain direction.Generally speaking, polaroid prepares by swelling, dyeing, the crosslinked and pure film of stretching polyethylene.The technology of preparation polaroid will be described now in further detail.At first, polyvinyl alcohol film is impregnated in the solution that contains iodine or dichroic dye and dyeing.Then, the polyvinyl alcohol film of dyeing is impregnated in the boric acid aqueous solution so that iodine molecule or dichroic dye molecule and polyvinyl alcohol film are crosslinked, crosslinked polyvinyl alcohol film then stretches, make iodine molecule or dichroic dye molecule to be provided with, thereby prepared polaroid along draw direction or vertical (machine direction).Then, make the polaroid drying, with bonding agent diaphragm (for example triacetyl cellulose (TAC) film) is adhered on two faces of dry polaroid to prepare final Polarizer.In this case, can dye successively or simultaneously, crosslinked and drawing process.
Yet, stacked when Polarizer in the orthogonal mode of its polarizing axis, be placed on the backlight and when observing, for example stain of striped occur at draw direction.In theory, because mutual when cross layered when Polarizer, light can not see through Polarizer, and this Polarizer should be in the state of complete dark.Yet actual, Polarizer is not perfectly, and the transmittance (cross transmittance) that intersects not exclusively is 0.Yet, because some factors (being provided with unequal as uneven dyeing or pigment), on made light transmission Polarizer and the Polarizer stain appears, this is because the transmittance of Polarizer also may change according to the position on polaroid.
Because the serious stain in the Polarizer, causing the brightness irregularities of screen and final products is substandard products.Therefore, need choose the sorting operation (sortingoperation) of substandard products by the degree of determining the stain in the Polarizer.Be to detect the Polarizer stain with bore hole at present by the overlooker.Yet the problem of this detection method is to be difficult to prepare the product with homegeneous production quality, because the degree of the substandard products of final products is by the subjective decision of overlooker.In addition, because the overlooker needs testing product one by one, it also has the low-down problem of production efficiency.
Summary of the invention
Technical matters
The present invention is that design is with solving prior art problems, therefore and the purpose of this invention is to provide the standardized automatic checkout system that is used to detect stain in polarizer, its design is used for measuring objectively the degree of stain in polarizer, monitor substandard products polaroid or substandard products Polarizer in the production line in real time, and after the cutting Polarizer, carry out the detection of Polarizer quality automatically, thereby the product quality and the production efficiency of Polarizer have been improved.
Technical scheme
According to an aspect of the present invention, it provides the automatic checkout system that is used to detect the stain in polarizer that is caused by uneven dyeing, and it comprises: light source; Be arranged on the detecting unit of light source front, and this detecting unit comprises at least two reference Polarizers that polarizing axis is arranged in parallel and is arranged on objective polarizer or target Polarizer between the reference Polarizer, and objective polarizer or target Polarizer are provided with in the mode of polarizing axis perpendicular to the polarizing axis of reference Polarizer; Image-generating unit, it is taken a picture with acquisition of image data to detecting unit; And arithmetic operation unit, it analyzes whether the view data of gathering is substandard products with definite objective polarizer in image-generating unit.
In this case, image-generating unit can comprise the CCD camera.
In addition, can carry out graphical analysis in arithmetic operation unit, it comprises: extract brightness data in horizontal (TD) view data with the constant distance collection of objective polarizer or target Polarizer; With brightness data quantitatively is raw data; From these raw data, obtain reference curve; And the calculating raw data is for the standard deviation of reference curve value.
In addition, may further include display unit according to the automatic checkout system of an exemplary embodiment of the present invention, it is presented at the standard deviation that calculates in the arithmetic operation unit or shows this objective polarizer or whether Polarizer is the information of substandard products.
In addition, according to another aspect of the present invention, it provides the automatic testing method that is used to detect the Polarizer stain.At this, this method comprises: with light irradiating and detecting unit, this detecting unit comprises at least two reference Polarizers and is arranged on objective polarizer or target Polarizer between the reference Polarizer; Transmit image data will be sent to arithmetic operation unit by the view data that obtains that detecting unit is taken a picture; From transmission along horizontal (TD) view data of objective polarizer or target Polarizer, extract brightness data with the constant distance collection, and quantitatively be raw data with brightness data; From raw data, obtain the reference curve value; Calculate the standard deviation of raw data for the reference curve value; And by thereby standard deviation and predetermined reference value comparison are determined whether objective polarizer or target Polarizer are substandard products.
Beneficial effect
As mentioned above, the automatic testing method that is used to detect the Polarizer stain according to an exemplary embodiment of the present invention can help product quality is consistent, because based on quantitative stain degree, its quantitative stain of Polarizer and whether measure final products be substandard products objectively from view data.
In addition, the automatic checkout system that an exemplary embodiment according to the present invention is used to detect stain in polarizer can help shortening preparation time and enhancing productivity, because Polarizer is automatically detected on production line, and does not need the examiner to detect Polarizer seriatim.
Description of drawings
Fig. 1 is the figure of diagram according to the automatic checkout system of an exemplary embodiment of the present invention.
Embodiment
Hereinafter, illustrative embodiments of the present invention will be described in further detail.
Fig. 1 shows the automatic checkout system according to an exemplary embodiment of the present invention.As shown in Figure 1, the automatic checkout system according to an exemplary embodiment of the present invention comprises light source 10, detecting unit 20, image-generating unit 30 and arithmetic operation unit 40.
At first, by using light irradiating and detecting unit 20, described light source 10 plays and makes the visible effect of stain, and it is set at the back side of detecting unit 20.For example, light source 10 comprises the backlight of display etc.
Simultaneously, described detecting unit 20 comprises reference Polarizer and objective polarizer or target Polarizer.In this case, reference Polarizer and objective polarizer (or target Polarizer) are set so that it is vertical mutually.At this, expression " vertical mutually " refers to the polarizing axis of reference Polarizer and the polarizing axis of target Polarizer intersects.
In addition, detecting unit 20 of the present invention preferably includes at least two reference Polarizers.In this case, the reference Polarizer can be provided with in the mode that its polarizing axis is parallel to each other, and objective polarizer or target Polarizer are arranged between the reference polaroid.When using a reference polaroid, owing to have the striped stain in the reference Polarizer, the stain of objective polarizer or target Polarizer may twist.In addition, clearly observe the stain of objective polarizer or target Polarizer at least during owing to two reference Polarizers that are arranged in parallel of use, so the advantage that Polarizer has is can easily measure in automatic checkout system.Therefore, it is visual to prevent the stain in the reference Polarizer that two reference Polarizers that polarizing axis is parallel to each other can be used for the present invention, and only make the stain of objective polarizer or target Polarizer visual.
Fig. 1 shows the automatic checkout system that comprises two reference Polarizers that is used to detect the Polarizer stain according to an exemplary embodiment of the present invention.For convenience of description, the reference Polarizer that is arranged near light source is called the first reference Polarizer, and another reference Polarizer that will be arranged on away from light source is called the second reference Polarizer.
When being arranged on objective polarizer or target Polarizer in the detecting unit 20, use rayed detecting unit 20 from light source 10.In theory, in the light of irradiation, only along the light transmission first reference Polarizer of the polarizing axis polarization of reference Polarizer.In this case, as previously mentioned, because the reference Polarizer is vertical mutually with the polarizing axis of objective polarizer (or target Polarizer), see through the transmitted light of the first reference Polarizer, that is, may not can see through objective polarizer (or target Polarizer) along the light of the polarizing axis polarization of reference Polarizer.Even light transmission objective polarizer (or target Polarizer), the light that sees through target Polarizer (or target Polarizer) may not can see through the second reference Polarizer because the polarizing axis of the second reference Polarizer also the polarizing axis with objective polarizer is vertical.Therefore, light can not be transmitted through on the detecting unit.
Yet, may cause light leak by being provided with of uneven dyeing or dyestuff is unequal, and can observe the stain that comprises the light and shade striped at vertical (MD) of Polarizer.Owing to the radioparent deviation of objective polarizer produces this stain, and when seriously forming stain as mentioned above, the brightness of screen may be inhomogeneous, and picture quality may deterioration.
Therefore, according to an exemplary embodiment of the present invention, stain by making the target Polarizer with light irradiating and detecting unit 20 as seen, detecting unit 20 is taken a picture with acquisition of image data in image-generating unit 30 described later, and with the data of gathering quantitatively to determine whether Polarizer is substandard products.Hereinafter, with the automatic testing method of more detailed description according to an exemplary embodiment of the present invention.
Then, image-generating unit 30 plays work that detecting unit 20 is taken a picture in order to acquisition of image data, and this image-generating unit 30 can comprise video processor equipment (for example CCD camera etc.).When with light irradiating and detecting unit 20, making the stain of objective polarizer or target Polarizer visible, 30 pairs of detecting units 20 of image-generating unit take a picture with acquisition of image data and with the image data transmission of gathering to arithmetic operation unit 40.In this case, described view data can comprise for example information such as optical density and intensity.
Whether arithmetic operation unit 40 plays definite polaroid (or Polarizer) is the effect of substandard products, and it is to realize with the degree of the stain that calculates objective polarizer or target Polarizer by analyze the view data of gathering in image-generating unit 30.
Preferably carry out according to the graphical analysis in the arithmetic operation unit 40 of an exemplary embodiment of the present invention with following 4 step operations.
At first, extract brightness data (first operation) in the view data of taking a picture with the CCD camera with constant distance along horizontal (TD) of objective polarizer or target Polarizer.Then, with the monochrome information of extracting quantitatively be raw data (second operation).Then, from raw data, calculate reference curve (the 3rd operation).In this case, by obtaining reference curve with raw data curve fitting (for example, by using following equation 1).Yet following equation 1 is an exemplary equation that obtains reference curve only, but the present invention is not particularly limited to this.
Equation 1
Wherein, f
iThe brightness value (or gray-scale value) of expression i pixel transversely.
When calculating reference curve by aforesaid operations, the difference between calculating raw data and the reference curve analog value is with the standard deviation (the 4th operation) of definite difference of calculating.
The high standard deviation that is obtained by aforesaid operations means the actual measured value scope of reference curve head and shoulders above.In this case, because the significant difference of light and shade, stain appears in the Polarizer brightly.On the contrary, the substandard deviation means that the value of actual measurement is similar to reference curve substantially.In this case, because light and shade does not have the difference of essence, stain manifests fuzzy.That is to say that the degree of its expression standard deviation and stain is proportional.Therefore, the standard deviation of calculating can be used for measuring objectively the degree of Polarizer stain.
When by above-mentioned image analysis calculation standard deviation interval, compare by standard deviation and the predefined reference value that will calculate, arithmetic operation unit 40 determines whether objective polarizer are substandard products.
The automatic checkout system that is used to detect the Polarizer stain according to an exemplary embodiment of the present invention may further include display unit 50, and it is presented at whether standard deviation or the objective polarizer calculated in the arithmetic operation unit are the information of substandard products.In this case, when whether the detection objective polarizer in arithmetic operation unit 40 is the mensuration of substandard products when finishing, arithmetic operation unit 40 transfers to display unit 50 with testing result with the form of signal, and allows the overlooker to verify testing result.
Simultaneously, in the time will being installed on the Polarizer production line according to the automatic checkout system of stain that is used to detect Polarizer of an exemplary embodiment of the present invention, this automatic checkout system can automatically detect the stain of the Polarizer on the Polarizer production line.The automatic checkout system of stain that is used to detect Polarizer according to an exemplary embodiment of the present invention can be used to detect the stain of the Polarizer that has completed, and also is used in and detects polaroid before diaphragm is installed.In order to detect Polarizer, will be installed in the finishing operation of Polarizer production line according to the automatic checkout system of an exemplary embodiment of the present invention, and, in order to detect polaroid, after the drying process of polaroid, automatic checkout system is installed.Therefore, can on production line, automatically detect the substandard products of polaroid and Polarizer.
Use detects the stain of Polarizer according to the automatic checkout system of an exemplary embodiment of the present invention method will be described below in further detail.
The method that is used to detect the Polarizer stain according to an exemplary embodiment of the present invention comprises: with light irradiating and detecting unit, this detecting unit comprises at least two reference Polarizers and is arranged on objective polarizer or target Polarizer between the reference Polarizer; The image data transmission that will obtain by detecting unit is taken a picture is to arithmetic operation unit; From transmission along horizontal (TD) graph data of objective polarizer or target Polarizer, extract brightness data with the constant distance collection, and quantitatively be raw data with brightness data; Calculate reference curve from raw data; Calculate reference curve with corresponding to the standard deviation of the difference between the raw value of reference curve with the difference value of measuring calculating; And, standard deviation determines whether objective polarizer or target Polarizer are substandard products by being compared with predetermined reference value.
Describe the operation of Polarizer stain detection method according to one exemplary embodiment below successively in detail.
At first, in detecting unit, objective polarizer or target Polarizer are arranged between the reference Polarizer that is arranged in parallel, make that objective polarizer or target Polarizer can be vertical with the reference Polarizer.Then, make the stain of objective polarizer or target Polarizer visual by the rayed detecting unit that sends from the light source that is arranged on the detecting unit back.
Then, image-generating unit is taken a picture to the visual detecting unit of stain, and with the image data transmission of gained to arithmetic operation unit.
Arithmetic operation unit is from image-generating unit image transmitted extracting data brightness data, and described view data is that horizontal (TD) along objective polarizer or target Polarizer gathers with constant distance, quantitatively is raw data with brightness data then.Express the quantification that the brightness level of extracting data can be carried out brightness data by digitizing.
Then, the data by the curve fitting quantification obtain reference curve.In this case, for example, can carry out curve fitting by equation 1.
Then, calculate reference curve with corresponding to the difference between the raw data (that is actual measurement numerical value) of reference curve to measure the standard deviation of the difference of calculating.In this case, as mentioned above, the degree of standard deviation of Ji Suaning and stain is proportional as can be seen.
When the standard deviation that calculates surpasses predefined reference value, determine that Polarizer is substandard products, when the standard deviation that calculates is not more than reference value, determine that Polarizer is a non-defective unit.
The result who detects can transfer to display unit with the form of signal to show testing result.
Embodiment
Below, illustrative embodiments of the present invention will be described in further detail.
Embodiment 1
It is that 28 ℃ dye bath stops and dyeed in 139 seconds that the PVA film that does not stretch is placed temperature, and stretches 4.7 times with the preparation polaroid.Thereby the polaroid of preparation has single transmittance (singletransmittance) of 42.5%.The polaroid of preparation is arranged on reference Polarizer (the single transmittance: 42.0%) that is arranged in parallel in the mode vertical with the reference Polarizer, and be arranged on 42 inches the backlight (LGPhilips LCD), and take a picture with image camera (SONY DSC-V1).Then, use the inventive method to carry out the image analysis calculation standard deviation.
In order to compare, also observe the degree of the stain in polarizer of preparation with bore hole.At this, the degree of stain is divided into three ranks: serious, medium and slight levels.
Listed standard deviation in the table 1 below and with the result of open hole detection.
Embodiment 2
Except will be in dye bath the residence time change into 128 seconds, prepare polaroid in the mode identical with embodiment 1.Then, the polaroid of preparation is installed between two reference Polarizers that are arranged in parallel, makes that polaroid can be perpendicular to the reference Polarizer, and be arranged on the backlight.Then, the method for the application of the invention is carried out the image analysis calculation standard deviation.
In order to compare, also observe the degree of the stain in polarizer of preparation with bore hole.At this, the degree of stain is divided into three ranks: serious, medium and slight levels.
Listed standard deviation in the table 1 below and with the result of open hole detection.
Embodiment 3
Except will be in dye bath the residence time change into 150 seconds, prepare polaroid in the mode identical with embodiment 1.Then, the polaroid of preparation is installed between two reference Polarizers that are arranged in parallel, makes that polaroid can be vertically and the reference Polarizer, and be arranged on the backlight.Then, the method for the application of the invention is carried out the image analysis calculation standard deviation.
In order to compare, also observe the degree of the stain in polarizer of preparation with bore hole.At this, the degree of stain is divided into three ranks: serious, medium and slight levels.
Listed standard deviation in the table 1 below and with the result of open hole detection.
Embodiment 4
Except will in dye bath, temperature becoming 33 ℃, prepare polaroid in the mode identical with embodiment 1.Then, the polaroid of preparation is installed between two reference Polarizers that are arranged in parallel, makes that polaroid can be vertically and the reference Polarizer, and be arranged on the backlight.Then, the method for the application of the invention is carried out the image analysis calculation standard deviation.
In order to compare, also observe the degree of the stain in polarizer of preparation in embodiment 1～4 with bore hole.At this, the degree of stain is divided into three ranks: serious, medium and slight levels.
Listed standard deviation in the table 1 below and with the result of open hole detection.
Table 1
| Standard deviation | Result with open hole detection | |
| Embodiment 1 | ??2.42 | Medium |
| Embodiment 2 | ??3.61 | Seriously |
| Embodiment 3 | ??2.00 | Slightly |
| Embodiment 4 | ??2.53 | Medium |
As according to according to an exemplary embodiment of the present invention be used to that to detect the automatic testing method of stain in polarizer measured, the degree that is displayed in Table 1 standard deviation and stain in polarizer is the increase of ratio ground.This shows that automatic checkout system according to one exemplary embodiment can be used for the stain degree of Polarizer quantitatively is objective numerical.
As mentioned above, compare, can help measuring objectively the substandard products degree of product according to the automatic checkout system of an exemplary embodiment of the present invention, and thereby product quality is consistent with the conventional sense method that bore hole with the examiner detects.In addition, can help reducing detection time by automatic checkout system is installed automatically to detect Polarizer on the Polarizer production line, reduce unnecessary expenditure and enhance productivity according to the automatic checkout system of an exemplary embodiment of the present invention.
Claims (6)
1, a kind of automatic checkout system that is used to detect the stain in polarizer that causes by uneven dyeing, this automatic checkout system comprises:
Light source;
Detecting unit, it is arranged on the front of light source, and this detecting unit comprises at least two reference Polarizers that polarizing axis is arranged in parallel and is arranged on objective polarizer or target Polarizer between the reference Polarizer, and is provided with in the polarizing axis of objective polarizer or the target Polarizer mode perpendicular to the polarizing axis of reference Polarizer;
Image-generating unit, it is taken a picture with acquisition of image data to detecting unit; With
Arithmetic operation unit, it analyzes whether the view data of gathering is substandard products with definite objective polarizer or target Polarizer in image-generating unit.
2, automatic checkout system according to claim 1, wherein, described image-generating unit comprises the CCD camera.
3, automatic checkout system according to claim 1, wherein, in described arithmetic operation unit, carry out graphical analysis, and may further comprise the steps:
From along extracting brightness data horizontal (TD) view data of objective polarizer or target Polarizer with the constant distance collection;
With brightness data quantitatively is raw data;
From raw data, obtain reference curve; With
Calculate the standard deviation of raw data to reference curve.
4, automatic checkout system according to claim 1, it further comprises display unit, it is presented at whether the standard deviation that calculates in the arithmetic operation unit or objective polarizer or target Polarizer are the information of substandard products.
5, according to each described automatic checkout system in the claim 1～4, wherein, described automatic checkout system is installed on the Polarizer production line.
6, a kind of automatic testing method that is used to detect the stain in polarizer that causes by uneven dyeing, this method may further comprise the steps:
With light irradiating and detecting unit, this detecting unit comprises at least two reference Polarizers and is arranged on objective polarizer or target Polarizer between the reference Polarizer;
The image data transmission that will obtain by detecting unit is taken a picture is to arithmetic operation unit;
From transmission along horizontal (TD) view data of objective polarizer or target Polarizer, extract brightness data with the constant distance collection, and quantitatively be raw data with brightness data;
From raw data, obtain reference curve;
Calculate the standard deviation of raw data to reference curve; With
By standard deviation and predetermined reference value are determined relatively whether objective polarizer or target Polarizer are substandard products.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080001933 | 2008-01-07 | ||
| KR1020080001933A KR101057626B1 (en) | 2008-01-07 | 2008-01-07 | Polarizer Stain Inspection Method Using Image Analysis and Polarizer Stain Automatic Inspection System Using The Same |
| KR10-2008-0001933 | 2008-01-07 | ||
| PCT/KR2009/000060 WO2009088212A1 (en) | 2008-01-07 | 2009-01-07 | Method for inspecting stain in polarizer due to uneven dyeing and automatic inspection system using the same |
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| Publication Number | Publication Date |
|---|---|
| CN101688942A true CN101688942A (en) | 2010-03-31 |
| CN101688942B CN101688942B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009800004921A Expired - Fee Related CN101688942B (en) | 2008-01-07 | 2009-01-07 | Method for inspecting stain in polarizer due to uneven dyeing and automatic inspection system using the same |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5538220B2 (en) |
| KR (1) | KR101057626B1 (en) |
| CN (1) | CN101688942B (en) |
| TW (1) | TWI431262B (en) |
| WO (1) | WO2009088212A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913859A (en) * | 2012-12-31 | 2014-07-09 | 东友精细化工有限公司 | Polarizing film detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5645142B2 (en) | 2011-04-28 | 2014-12-24 | エルジー・ケム・リミテッド | Unevenness automatic inspection device and inspection method for polarizing plate using color difference analysis |
| KR101440975B1 (en) * | 2011-04-28 | 2014-09-18 | 주식회사 엘지화학 | Automatic inspection apparatus for stain in the polarizing plate using color difference analysis |
| JP2013130749A (en) * | 2011-12-22 | 2013-07-04 | Sharp Corp | Optical sheet sorting device |
| JP2013182113A (en) * | 2012-03-01 | 2013-09-12 | Sharp Corp | Optical sheet selection device |
| JP6456235B2 (en) * | 2015-05-11 | 2019-01-23 | 株式会社クラレ | Polarizing film inspection method |
| KR102486442B1 (en) * | 2019-06-07 | 2023-01-09 | 주식회사 엘지화학 | Device for testing liquid crystal stain of polarizing plate and method for testing liquid crystal stain of polarizing plate |
| KR20220053304A (en) | 2020-10-22 | 2022-04-29 | 동우 화인켐 주식회사 | Automatic inspection apparatus for stain and method for inspecting stain using thereof |
| JP2022114832A (en) * | 2021-01-27 | 2022-08-08 | 住友化学株式会社 | Defect inspection method and defect inspection device |
| KR20220112599A (en) | 2021-02-04 | 2022-08-11 | 동우 화인켐 주식회사 | An automatic inspection apparatus for stain and method for inspecting stain using thereof |
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| JPH06148095A (en) * | 1992-10-30 | 1994-05-27 | Nippon Steel Chem Co Ltd | Method for detecting transparent defect of film sheets |
| JPH08292406A (en) * | 1995-04-24 | 1996-11-05 | Advantest Corp | Lcd panel inspecting device |
| JP3803999B2 (en) * | 1999-08-25 | 2006-08-02 | 富士写真フイルム株式会社 | Defect inspection equipment |
| JP2001349839A (en) * | 2000-06-07 | 2001-12-21 | Sumitomo Chem Co Ltd | Inspection method for polarizing film defect |
| JP2003016443A (en) * | 2001-07-02 | 2003-01-17 | Konica Corp | Method, device, and chart image for image quality evaluation |
| JP2006250631A (en) | 2005-03-09 | 2006-09-21 | Fuji Photo Film Co Ltd | Inspection method and inspection device for optical compensating sheet |
| JP2006337630A (en) * | 2005-06-01 | 2006-12-14 | Sumitomo Chemical Co Ltd | Method for manufacturing multilayer optical film |
| JP2007170961A (en) * | 2005-12-21 | 2007-07-05 | Fujifilm Corp | Inspection device and inspection method |
| JP4960026B2 (en) * | 2006-06-09 | 2012-06-27 | 富士フイルム株式会社 | Film defect inspection apparatus and film manufacturing method |
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2008
- 2008-01-07 KR KR1020080001933A patent/KR101057626B1/en active IP Right Grant
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2009
- 2009-01-07 TW TW098100340A patent/TWI431262B/en active
- 2009-01-07 CN CN2009800004921A patent/CN101688942B/en not_active Expired - Fee Related
- 2009-01-07 JP JP2010518132A patent/JP5538220B2/en active Active
- 2009-01-07 WO PCT/KR2009/000060 patent/WO2009088212A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913859A (en) * | 2012-12-31 | 2014-07-09 | 东友精细化工有限公司 | Polarizing film detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5538220B2 (en) | 2014-07-02 |
| TWI431262B (en) | 2014-03-21 |
| KR20090076166A (en) | 2009-07-13 |
| JP2010534351A (en) | 2010-11-04 |
| CN101688942B (en) | 2011-06-15 |
| WO2009088212A1 (en) | 2009-07-16 |
| TW200931001A (en) | 2009-07-16 |
| KR101057626B1 (en) | 2011-08-19 |
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