CN110057547A - The method for evaluating the optical characteristics of transparent base - Google Patents
The method for evaluating the optical characteristics of transparent base Download PDFInfo
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- CN110057547A CN110057547A CN201910166872.8A CN201910166872A CN110057547A CN 110057547 A CN110057547 A CN 110057547A CN 201910166872 A CN201910166872 A CN 201910166872A CN 110057547 A CN110057547 A CN 110057547A
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- transparent base
- dazzle
- luminance distribution
- glare
- brightness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
Abstract
A method of the optical characteristics of evaluation transparent base, wherein sequence differently has following steps: the step of holding the anti-glare index value R for the quantification of transparent base for having carried out anti-dazzle light processing；And the step of holding the dazzles target value G of quantification of the transparent base.
Description
The application be on November 11st, 2016 it is submitting, application No. is 201580024709.8, it is entitled " evaluation
The divisional application of the application of the method and transparent base of the optical characteristics of transparent base ".
Technical field
The present invention relates to the methods of the optical characteristics of evaluation transparent base.
Background technique
In general, in the such display of LCD (Liquid Crystal Display: liquid crystal display) device with pixel
On device, in order to carry out the protection of the display device, configured with the protective cover being made of transparent base.
However, in the case where being provided with such transparent base on the display apparatus, it is aobvious being observed via transparent base
When the display image of showing device, it is frequently present of and generates the case where article for being placed in periphery is mirrored.When transparent base generates in this way
When mirroring, show that the observer of image is difficult to observe display image, and uncomfortable impression can be received.
Therefore, mirror to inhibit such, anti-dazzle light processing is applied for the surface of transparent base sometimes.
Mirroring to display device is evaluated it should be noted that showing in patent document 1 using special device
Method.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2007-147343 bulletin
Summary of the invention
Subject to be solved by the invention
As previously mentioned, often implementing anti-dazzle light processing to transparent base to inhibit mirroring for ambient light.
However, other than the inhibitory effect of ambient light mirrored, also wanting sometimes simultaneously in actual transparent base
Hold the characteristics such as anti-glare and dazzle.
However, up to the present, the method for also less knowing to evaluate this two side of the anti-glare and dazzle of transparent base.Especially
It is the dazzle about transparent base, up to the present evaluation method is difficult to be abundant establishment, and it is tired to there is quantitatively evaluation itself
Difficult problem.
It should be noted that the appraisal of glare device as transparent base, recently, SMS-1000 device (Display-
Messtechnik&Systeme corporation) cause to pay close attention to.In the SMS-1000 device, by being clapped via solid-state imager
The parsing of the image (brightness) of a part for the transparent base taken the photograph, can evaluate the dazzle of transparent base.
However, confirming frequent in the evaluation of -1000 device of based on SMS obtain according to the opinion of the present application person
Less than dazzle appropriate measurement result the case where.That is, under visual observation, although intentional dazzle is not seen, in base
In the evaluation of SMS-1000 device, exists and be judged as the case where transparent base shows significant dazzle and to generate it opposite
As a result the case where.
In this way, being also required to suitably hold the technology of this two side of the anti-glare and dazzle of transparent base at present.
The present invention makes in view of such background, in the present invention, and it is an object of the present invention to provide one kind can be evaluated suitably
The evaluation method of this two side of anti-dazzle treated the anti-glare and dazzle of transparent base.
Solution for solving the problem
In the present invention, a kind of method of optical characteristics for evaluating transparent base is provided, which is characterized in that sequence is differently
With following steps:
The step of obtaining the anti-glare index value of the quantification of transparent base, the transparent base have first and second table
The face and first surface has been carried out anti-dazzle light processing；And
The step of obtaining the dazzles target value of the quantification of the transparent base,
The anti-glare index value of the quantification obtains as follows:
(a) from first and second surface transparent base the first surface lateral edge relative to the transparent base
The thickness direction of body irradiates the first light at 20 ° of direction, and measures the brightness of the 20 ° of positive reflection lights reflected by the first surface
The step of；
(b) change the light angle of the reflected light reflected by the first surface in the range of -20 °~+60 °, survey
The step of brightness of the fixed whole reflected lights reflected by the first surface；And
(c) according to formula below (1), the step of calculating anti-glare index value R,
Anti-glare index value R=
(brightness of -20 ° of positive reflection lights of brightness of whole reflected lights)/(brightness of whole reflected lights) formula (1),
The dazzles target value of the quantification is obtained by following step:
(A) transparent base is configured in a manner of making the second surface be located at display device side and is filled in the display
The step set；
(B) in the state of opening the display device, the transparent base is shot using solid-state imager, is obtained
The step of first image, and by the solid-state imager between the transparent base at a distance from be set as d, by the solid
When the focal length of photographing element is set as f, step that the range index r (=d/f) when shooting is 8 or more；
(C) the step of the first Luminance Distribution being formed according to the first image of the acquirement；
(D) it moves the transparent base along the direction substantially parallel with the second surface, makes the transparent base
The step mobile relative to the display device；
(E) the step of repeating (B) and (C) forms the step of the second Luminance Distribution according to the second image of acquirement
Suddenly；
(F) according to the difference of first Luminance Distribution and second Luminance Distribution, find out difference Luminance Distribution Δ S's
Step；
(G) according to the difference Luminance Distribution Δ S, average brightness profile Δ S is calculatedaveAnd standard deviation sigma, and according to
Under formula (2) the step of obtaining output valve A,
Output valve A=standard deviation sigma/average brightness profile Δ SaveFormula (2)
(H) the step of (A)~(G) described in implementing in the anti-dazzle of benchmark treated transparent base, and replace output
Value A and the step of obtain referring to output valve Q, and should (H) the step of be (A)~(G) the step of before implement or with
The step of the step of (A)~(G), implements side by side；And
(I) the step of dazzles target value G being found out according to formula below (3),
Dazzles target value G=(output valve A)/(referring to output valve Q) formula (3).
In addition, in the present invention, provide a kind of transparent base, there is first and second surface and the first surface by into
Go anti-dazzle light processing, which is characterized in that
When being evaluated using method of the invention above-mentioned,
The anti-glare index value R is 0.4 or more,
The dazzles target value G is 0.6 or less.
Invention effect
In the present invention, it is capable of providing a kind of anti-glare that can suitably evaluate anti-dazzle treated transparent base and dizzy
The evaluation method of both light.
Detailed description of the invention
Fig. 1 is the process that outlined the method for the anti-glare of evaluation transparent base of one embodiment of the present invention
Figure.
Fig. 2 is the figure for being shown schematically in an example of the measurement device used when obtaining anti-glare index value.
Fig. 3 is the process for being diagrammatically denoted by the method for the dazzle of evaluation transparent base of one embodiment of the present invention
Figure.
Fig. 4 is the first image obtained in a process of the method for dazzle for being shown schematically in evaluation transparent base
Figure.
Fig. 5 is the first brightness point obtained in a process of the method for dazzle for being shown schematically in evaluation transparent base
The figure of cloth.
Fig. 6 is to have marked and drawed the anti-glare index value R (horizontal axis) obtained in various transparent bases and dazzles target value G (to indulge
Axis) relationship an example figure.
Fig. 7 is the figure for schematically showing the transparent base of one embodiment of the present invention.
Fig. 8 is to indicate grade (longitudinal axis) and anti-glare index based on visual anti-glare obtained in each transparent base
The coordinate diagram of an example of the relationship between value R (horizontal axis).
Fig. 9 is to indicate the dazzles target value G (longitudinal axis) obtained in each transparent base and the grade based on visual dazzle
The coordinate diagram of an example of the relationship between (horizontal axis).
Specific embodiment
Hereinafter, the present invention will be described in detail.
As previously mentioned, in anti-dazzle treated transparent base, anti-glare to be held and dazzle this two characteristic are occasionally wanted to.
However, currently, the method that can objectively evaluate this two side of the anti-glare and dazzle of transparent base almost has not yet been viewed.
Especially as the method for implementing anti-dazzle light processing to transparent base, there are various methods, therefore anti-dazzle light processing
There is also various forms on the surface of transparent base afterwards.By the anti-glare of such transparent base with various surfaces and dazzle
The case where equally being evaluated with identical index is extremely difficult.
For example, recently as the appraisal of glare device of transparent base, SMS-1000 device attracts attention.However, according to this
The opinion for applying for inventors, confirms in the evaluation of -1000 device of based on SMS, often cannot get the survey of dazzle appropriate
Determine result.Even if that is, the transparent base of intentional dazzle is not seen in visual observation, in the evaluation of -1000 device of based on SMS
In, there is also be judged as the case where the case where transparent base shows biggish dazzle is with its opposite result is generated.
Even if being still difficult to be to establish sufficiently effective measuring method in this way, being only conceived to the dazzle of transparent base.
In addition, actual conditions are to there's almost no the evaluation method of this two side of the anti-glare for being conceived to transparent base and dazzle.
In contrast, in the present invention, providing a kind of method of optical characteristics for evaluating transparent base, which is characterized in that
Sequence differently has following steps:
The step of obtaining the anti-glare index value of the quantification of transparent base, the transparent base have first and second table
The face and first surface has been carried out anti-dazzle light processing；And
The step of obtaining the dazzles target value of the quantification of the transparent base,
The anti-glare index value of the quantification obtains as follows:
(a) from first and second surface transparent base the first surface lateral edge relative to the transparent base
The thickness direction of body irradiates the first light at 20 ° of direction, and measures the brightness of the 20 ° of positive reflection lights reflected by the first surface
The step of；
(b) change the light angle of the reflected light reflected by the first surface in the range of -20 °~+60 °, survey
The step of brightness of the fixed whole reflected lights reflected by the first surface；And
(c) according to formula below (1), the step of calculating anti-glare index value R,
Anti-glare index value R=
(brightness of -20 ° of positive reflection lights of brightness of whole reflected lights)/(brightness of whole reflected lights) formula (1),
The dazzles target value of the quantification is obtained by following step:
(A) transparent base is configured in a manner of making the second surface be located at display device side and is filled in the display
The step set；
(B) in the state of opening the display device, the transparent base is shot using solid-state imager, is obtained
The step of first image, and by the solid-state imager between the transparent base at a distance from be set as d, by the solid
When the focal length of photographing element is set as f, step that the range index r (=d/f) when shooting is 8 or more；
(C) the step of the first Luminance Distribution being formed according to the first image of the acquirement；
(D) it moves the transparent base along the direction substantially parallel with the second surface, makes the transparent base
The step mobile relative to the display device；
(E) the step of repeating (B) and (C) forms the step of the second Luminance Distribution according to the second image of acquirement
Suddenly；
(F) according to the difference of first Luminance Distribution and second Luminance Distribution, find out difference Luminance Distribution Δ S's
Step；
(G) according to the difference Luminance Distribution Δ S, average brightness profile Δ S is calculatedaveAnd standard deviation sigma, and according to
Under formula (2) the step of obtaining output valve A,
Output valve A=standard deviation sigma/average brightness profile Δ SaveFormula (2)
(H) the step of (A)~(G) described in implementing in the anti-dazzle of benchmark treated transparent base, and replace output
Value A and the step of obtain referring to output valve Q, and should (H) the step of be (A)~(G) the step of before implement or with
The step of the step of (A)~(G), implements side by side；And
(I) the step of dazzles target value G being found out according to formula below (3),
Dazzles target value G=(output valve A)/(referring to output valve Q) formula (3).
In the method for the optical characteristics of evaluation transparent base of the invention, such as in detailed below shown in, no matter at anti-dazzle
The method of reason is how, can suitably evaluate the anti-glare for having carried out anti-dazzle treated transparent base and dazzle this two
Side.
In addition, in the method for the invention, using the value of numeralization as the anti-glare of transparent base and dazzle.Therefore,
It is unrelated with the subjectivity of observer or prejudice and can objective and quantitatively judge that above-mentioned optics is special about anti-glare and dazzle
Property.
(embodiment of the method for the optical characteristics about evaluation transparent base of the invention)
Next, illustrate to be able to use in the method for the invention evaluates the anti-dazzle of transparent base respectively referring to attached drawing
One embodiment of property and the method for dazzle.
(anti-glare evaluation method)
Fig. 1 diagrammatically shows the process of the method for the anti-glare of the evaluation transparent base of one embodiment of the present invention.
As shown in Figure 1, the method (hereinafter also referred to as " first method ") of the anti-glare of the evaluation transparent base includes as follows
Step:
(a) from the first surface side of the transparent base with first and second surface, along relative to described transparent
The thickness direction of matrix irradiates the first light at 20 ° of direction, and measures the light by the first surface positive reflection (hereinafter, also referred to as
For " 20 ° of positive reflection lights ") brightness the step of (step S110)；
(b) change the light angle of the reflected light reflected by the first surface in the range of -20 °~+60 °, survey
The step of brightness of fixed the first light (hereinafter also referred to as " whole reflected lights ") reflected by the first surface (step S120)；
And
(c) according to formula below (1), the step of calculating anti-glare index value R (step S130).
Anti-glare index value R=
(brightness of -20 ° of positive reflection lights of brightness of whole reflected lights)/(brightness of whole reflected lights) formula (1)
Hereinafter, being illustrated to each step.
(step S110)
Firstly, preparing the transparent base on first and second surface for having relative to each other.
As long as transparent base is transparent, so that it may be made of any materials.Transparent base is also possible to such as glass or plastics
Deng.
In the case where transparent base is made of glass, the composition of glass is not particularly limited.Glass is also possible to for example
Soda-lime glass or alumina silicate glass.
In addition, it is strong chemistry can also to be carried out to first and/or second surface in the case where transparent base is made of glass
Change processing.
Here, chemical intensification treatment is that glass substrate is instigated to be immersed in the fuse salt comprising alkali metal, it will be in glass base
The small alkali metal of ionic radius existing for the most surface of plate (ion) is replaced into the big alkali of the ionic radius present in fuse salt
The general name of the technology of metal (ion).In chemical intensification treatment method, in the surface configuration ion half of processed glass substrate
The diameter alkali metal (ion) bigger than original atom.Therefore, compression stress can be applied to the surface of glass substrate, thus glass
The intensity (especially rupture strength) of substrate improves.
For example, including sodium ion (Na in glass substrate+) in the case where, by chemical intensification treatment, which is set
It is changed to such as potassium ion (K+).Alternatively, for example, including lithium ion (Li in glass substrate+) in the case where, chemistry can also be passed through
The lithium ion is replaced into such as sodium ion (Na by intensive treatment+) and/or potassium ion (K+)。
On the other hand, in transparent base situation made of plastics, the composition of plastics is not particularly limited.Transparent base
It is also possible to such as polycarbonate substrate.
It should be noted that implementation carries out anti-dazzle light processing to the first surface of transparent base before step S110
Step.The method of anti-dazzle light processing is not particularly limited.Anti-dazzle light processing is also possible to such as frosted processing, etching process, spray
Sand processing, polishing treatment or silicon coating processing etc..
In the anti-glare measuring method of one embodiment of the present invention, quantifying for the anti-glare for indicating transparent base is used
Index value (anti-glare index value R), can equally evaluate various transparent bases.Therefore, the method as anti-dazzle light processing,
Various methods can be used.
The first surface of anti-dazzle treated transparent base also can have the table of such as 0.05 μm~1.0 μm of range
Surface roughness (arithmetic average roughness Ra).
Next, from the first surface side of the transparent base of preparation towards the thickness direction relative to transparent base at 20 °
The first light is irradiated in ± 0.5 ° of direction.First light is reflected by the first surface of transparent base.In the reflected light, receiving 20 ° just
Reflected light measures its brightness, as " brightness of 20 ° of positive reflection lights ".
(step S120)
Next, change the light angle of the reflected light reflected by first surface in the range of -20 °~+60 °, it is real
Apply same operation.At this point, the brightness for the first light that measurement is emitted by the first surface reflection of transparent base from first surface
It is distributed and is amounted to, as " brightness of whole reflected lights ".
(step S130)
Next, calculating anti-glare index value R according to formula below (1):
Anti-glare index value R=
(brightness of -20 ° of positive reflection lights of brightness of whole reflected lights)/(brightness of whole reflected lights) formula (1)
As described later, the judging result phase of the anti-glare index value R with the visual anti-glare based on observer are confirmed
Close, show close to the vision of people trace the case where.For example, anti-glare index value R shows biggish value (value close to 1)
Transparent base anti-glare it is excellent, otherwise to show that the transparent base of lesser value be in anti-glare poor by anti-glare index value R
Tendency.Therefore, quantitative index when anti-glare index value R can be used as the anti-glare for judging transparent base.
Fig. 2 schematically shows the one of the measurement device used when obtaining the anti-glare index value R that formula (1) above-mentioned indicates
Example.
As shown in Fig. 2, measurement device 300 has light source 350 and detector 370, transparent base is configured in measurement device 300
Body 210.Transparent base 210 has first surface 212 and second surface 214.Light source 350 radiates first towards transparent base 210
Light 362.Detector 370 receives the reflected light 364 reflected in first surface 212, and detects its brightness.
It should be noted that transparent base 210 is in a manner of making first surface 212 be located at 370 side of light source 350 and detector
Configuration.Therefore, the first light that detector 370 detects is the reflected light 364 reflected by transparent base 210.Moreover, in transparent base
In the case that the surface of 210 side is carried out anti-dazzle light processing, the surface of the anti-dazzle light processing becomes the of transparent base 210
One surface 212.That is, in this case, transparent base 210 is so that the surface of anti-dazzle light processing is located at light source 350 and detector 370
The mode of side configures in measurement device 300.
In addition, the first light 362 has tilted 20 ° of angular illumination with the thickness direction relative to transparent base 210.It needs
It is bright, in this application, it is contemplated that 20 ° ± 0.5 ° of range is defined as 20 ° of angle by the error of measurement device.
In such measurement device 300, from light source 350 towards transparent base 210 irradiate the first light 362, using so that
Light angle φ becomes the detector 370 that 20 ° of mode configures, and detection is reflected just by the first surface 212 of transparent base 210
Reflected light 364.Detect " 20 ° of positive reflection lights " as a result,.
Next, making the light angle φ for measuring reflected light 364 in the range of -20 °~+60 ° in detector 370
Same operation is implemented in variation.
Also, in the range of φ=- 20 °~+60 ° of light angle, the first surface 212 by transparent base 210 is detected
The Luminance Distribution of the reflected light 364 (referred to as whole reflected lights) of reflection, and amounted to.
Here, negative (-) of light angle φ indicates the light angle and becomes the subject surface of evaluation object (in above-mentioned example
In be first surface) normal the case where comparing in incident light side, positive (+) indicates the normal of the light angle and subject surface
The case where compared to incident light side is not at.
According to the brightness of 20 ° of obtained positive reflection lights and the brightness of whole reflected lights, pass through formula above-mentioned (1), Neng Gouqu
Obtain the anti-glare index value R of transparent base 210.It should be noted that such measurement is by using commercially available goniometer (angle
Photometer) can easily it implement.
It should be noted that the irradiating angle of the first light can be selected suitably from 60 °~5 ° of range.But in this Shen
Please in, from showed based on anti-glare evaluation and the quantitative assessment from visually it is good it is related from the perspective of, select 20 ° as
The irradiating angle of first light.
(about dazzles target value)
Fig. 3 diagrammatically shows the process of the method for the dazzle of the evaluation transparent base of one embodiment of the present invention.
As shown in figure 3, the method (hereinafter also referred to as " second method ") of the dazzle of the evaluation transparent base includes following step
It is rapid:
(A) transparent base with first and second surface is configured in a manner of making second surface be located at display device side
On said display means the step of (step S210)；
(B) in the state of opening the display device, the transparent base is shot using solid-state imager, is obtained
The step of first image, and by the solid-state imager between the transparent base at a distance from be set as d, by the solid
When the focal length of photographing element is set as f, step (step S220) that the range index r (=d/f) when shooting is 8 or more；
(C) the step of the first Luminance Distribution being formed according to the first image of the acquirement (step S230)；
(D) it moves the transparent base along the direction substantially parallel with the second surface, makes the transparent base
The step (step S240) mobile relative to the display device；
(E) the step of repeating (B) and (C) forms the step of the second Luminance Distribution according to the second image of acquirement
Suddenly (step S250)；
(F) according to the difference of first Luminance Distribution and second Luminance Distribution, find out difference Luminance Distribution Δ S's
Step (step S260)；
(G) according to the difference Luminance Distribution Δ S, average brightness profile Δ S is calculatedaveAnd standard deviation sigma, and according to
Under formula (2) the step of obtaining output valve A (step S270)；
Output valve A=standard deviation sigma/average brightness profile Δ SaveFormula (2)
(H) the step of (A)~(G) described in implementing in the anti-dazzle of benchmark treated transparent base, replace output valve A
And it obtains referring to the step of output valve Q (step S280)；
(I) the step of dazzles target value G being found out according to formula below (3) (step S290).
Dazzles target value G=(output valve A)/(referring to output valve Q) formula (3)
Hereinafter, each step is described in detail.
(step S210)
Firstly, preparing the transparent base on first and second surface for having relative to each other.The first surface quilt of transparent base
Carry out anti-dazzle light processing.
It should be noted that the material of transparent base, composition etc. are identical as the situation shown in aforementioned step S110,
Therefore it is not described further here.
But as previously mentioned, in the past, it is difficult to the dazzle of following transparent bases is equally evaluated by identical index, it is described
Transparent base has not only due to the condition in such as etching process changes between such single anti-dazzle processing method
And different various surfaces, and due to the different various surfaces there are multiple anti-dazzle processing methods.
However, such as later shown, using indicates transparent base in the appraisal of glare method of one embodiment of the present invention
Dazzle quantitative index value (dazzles target value G), can equally evaluate various transparent bases.Therefore, it is necessary to what is noticed
It is that the means of the appraisal of glare method of the one embodiment of the present invention alternatively processing method of anti-dazzle light processing are also useful.
Next, preparing display device.As long as display device has the structure of pixel (pixel), without special
It limits.Display device is also possible to such as LCD device, OLED (Organic Light Emitting Diode: organic light emission two
Pole pipe) device, PDP (Plasma Display Panel: plasma display) device or planar display etc..Display
The resolution of device is preferably such as 132ppi or more, more preferably 186ppi or more, further preferably 264ppi or more.
Next, configuring transparent base on the display apparatus.At this point, transparent base is located at display device side with second surface
Mode configure on the display apparatus.
(step S220)
Next, under the state (showing the state of image) for opening display device, using solid-state imager, from
First surface side shoots transparent base, obtains the image (the first image) of the transparent base of configuration on the display apparatus.
The distance between solid-state imager and transparent base d are set as defined value.
It should be noted that in this application, using range index r as corresponding to solid-state imager and transparent base
The distance between d index.Here, range index r uses the focal length f and solid-state imager of solid-state imager and transparent base
The distance between body d is indicated by formula below (4):
Range index r=(the distance between solid-state imager and transparent base d)/
(focal length f) the formula (4) of solid-state imager
It should be noted that in this application, range index r is 8 or more.
This is because the distance between solid-state imager and transparent base d become smaller if range index r is less than 8, hold
The influence of the form of anti-dazzle treated first surface vulnerable to transparent base.Therefore, by make range index r 8 with
On, it can be in the difference for the form for intentionally inhibiting the first surface as caused by the difference of the method for the anti-dazzle light processing applied
Influence in the state of, equally evaluate the dazzle for having carried out anti-dazzle treated transparent base using various methods.
Range index r is preferably 9 or more, and more preferably 10 or more.
The image for being shown in display device is the image of single color (such as green), is preferably displayed in the display of display device
Image surface is on the whole.This is the influence in order to strongly reduce difference of the observation method as caused by the difference of display color etc..
As solid-state imager, such as charge coupled cell (CCD), complementary metal oxide film semiconductor can use
(CMOS).No matter using in the case where which, all it is preferable to use the digital cameras etc. with high pixel number.
By the step, the first image 410 that such as Fig. 4 is schematically shown can be obtained.In the example shown in Figure 4,
In the first image 410, region corresponding with 9 pixels for being arranged in the column of 3 rows × 3 of a part of display device is observed
(hereinafter referred to as corresponding region 420-1~420-9) is bright.
It should be noted that in Fig. 4, in order to make clear, by each corresponding region 420-1~420-9 each other sufficiently to divide
From state show.However, it is necessary to be noted that, the distance in actual image, between each corresponding region 420-1~420-9
Part part superposition narrower, that adjacent corresponding region is become clear sometimes each other.
(step S230)
Next, carrying out image analysis for the first image 410 taken in step S220, the first brightness point is formed
Cloth.First Luminance Distribution is formed on X/Y plane as three-dimensional mapping.
Fig. 5 schematically shows an example for the first Luminance Distribution that the step obtains.
As shown in figure 5, the first Luminance Distribution 430 is corresponding with each corresponding region 420-1~420-9 of the first image 410
Region be respectively provided with the Luminance Distribution ingredient q of substantially normal distribution shape1~q9.More generally, the first Luminance Distribution 430
Pass through i multiple Luminance Distribution ingredient qiSet expression (i be 2 or more integer).
What is needed to pay attention to is that becoming complicated in Fig. 5 in order to avoid describing, Luminance Distribution ingredient q1~q9Bidimensionality
(i.e. non-cubic property) indicate.
It should be noted that can also increase and be shot in step S220 to improve the precision of the first Luminance Distribution 430
The number of the first image 410 same image analysis is implemented for each first image 410 in step S230.It is this
In the case of, then, by averaging to each image analysis result, higher first Luminance Distribution 430 of precision can be obtained.
(step S240)
Next, sliding transparent base along the direction parallel with second surface, fill transparent base relative to display
Set relative movement.Moving distance is preferably smaller than 10mm, for example, it is also possible to for number mm.
(step S250)
Next, repeating the step S220~step S230.That is, in the state of opening display device, benefit
The second image is obtained with solid-state imager, and the second Luminance Distribution is formed according to the second image.
In this step, or increase the precision of second Luminance Distribution and increase and shot using solid-state imager
The second image number.Then, image analysis is implemented for each second image, is averaged to each image analysis result
Change, thus, it is possible to obtain higher second Luminance Distribution of precision.
It can be obtained as a result, by multiple Luminance Distribution ingredient siThe second of the set expression of (integer for being 2 or more in this i) is bright
Degree distribution.It should be noted that Luminance Distribution ingredient si is made of number identical with Luminance Distribution ingredient qi.
(step S260)
Next, calculating difference Luminance Distribution Δ S according to the difference of the first Luminance Distribution and the second Luminance Distribution.Difference
Luminance Distribution Δ S passes through the Luminance Distribution of substantially normal distribution shape in the same manner as the first Luminance Distribution and the second Luminance Distribution
Ingredient tiThe set expression of (integer for being 2 or more in this i).
(step S270)
Next, calculating average brightness profile Δ S using the difference Luminance Distribution Δ S obtained by step S260aveAnd mark
Quasi- difference σ.
Here, average brightness profile Δ SaveIt can be by i Luminance Distribution for including in difference Luminance Distribution Δ S
Ingredient tiAbsolute value average to find out.Moreover, i for including in difference Luminance Distribution Δ S can be used in standard deviation sigma
Luminance Distribution ingredient ti, average brightness profile Δ Save, found out according to formula below (5).
[mathematical expression 1]
Output valve A is calculated by formula below (2) according to obtained average brightness profile Δ Save and standard deviation sigma.
Output valve A=standard deviation sigma/average brightness profile Δ SaveFormula (2)
(step S280)
Next, using anti-dazzle treated the transparent base of benchmark (standard), implement aforementioned step S210~
The step of step S270.Replace the output valve A of the formula (2) as a result, and obtains referring to output valve Q.
Dazzles target value is indicated by the ratio referring to output valve Q obtained like that with (3) formula as be described hereinafter, therefore is joined
Measurement reproducibility is consumingly required according to output valve Q, needs the error much larger than each measurement.It is appropriate in order to simply prepare to assign
Referring to anti-dazzle treated the transparent base of the benchmark (standard) of output valve Q, soda-lime glass is carried out as long as selecting
Based in frosted/etching anti-dazzle treated flat glass, 60 degree of gloss values are as big as possible, and roughness curve is wanted
The average length RSm of element is 70 μm more than and less than 120 μm, the transparent base that can be obtained as commercially available product.
Here, 60 degree of gloss values can be used as mirror surface luster by the method measurement in accordance with JIS-Z8741.60 degree of gloss
Value is, for example, 110 or more, more preferably 120 or more.The average length RSm of roughness curve element can be by accordance with JIS
The method of B0601 (2001) is measured.The average length RSm of roughness curve element is, for example, 70 μm or more, more preferably
80 μm or more, and less than 120 μm, preferably smaller than 110 μm.
In one embodiment of the present invention, as the anti-dazzle for the benchmark for meeting above-mentioned condition, that treated is transparent
It is anti-dazzle to have selected the VRD140 that 60 degree of gloss values are 140% and the average length RSm of table roughness curve element is 85 μm for matrix
Light processing glass (Asahi Glass Co., Ltd's system).
It should be noted that anti-dazzle treated the transparent base of evaluation also can be used in step S280, in reality
Implement before applying aforementioned step S210~step S270.Alternatively, step S280 can also be with the anti-dazzle light processing of evaluation
Step S210~step S270 implementation of transparent base afterwards is implemented side by side.
(step S290)
Next, finding out dazzles target value G according to formula below (3) using output valve A and referring to output valve Q:
Dazzles target value G=(output valve A)/(referring to output valve Q) formula (3)
Dazzles target value G is related to the judging result of visual dazzle based on observer as described later, confirms aobvious
The case where showing close to the trace of the vision of people.For example, the dazzle of dazzles target value G big transparent base is significant, on the contrary dazzle
Index value G small transparent base is in the tendency for inhibiting dazzle.Therefore, dazzles target value G can be used transparent as judging
Quantitative index when the dazzle of matrix.
More than, referring to Fig. 3~Fig. 5, illustrate an example of the method for the dazzle of evaluation transparent base.But in the present invention
In, the method for evaluating the dazzle of transparent base is not limited thereto.
For example, in process above-mentioned, it, can also according to difference Luminance Distribution Δ S between step S260 and step S270
To implement origin in the ingredient of the display device is filtered removing the step of (step S265).Replace difference Luminance Distribution
Δ S and use the actual effect difference Luminance Distribution Δ S that obtains by the operatione, carry out implementation steps S270, thus, it is possible to further mention
The precision for the dazzles target value G that height obtains.
But as long as step S265 is carried out when needed, it may not have to implement.
It should be noted that the method for the dazzle of evaluation transparent base described above is filled by using such as SMS-1000
Setting (Display-Messtechnik&Systeme corporation) can easily implement.
By using such anti-glare index value R described above and dazzles target value G, anti-dazzle can be quantitatively evaluated
The optical characteristics of treated transparent base.
(evaluation based on 2 indexs)
Next, illustrating while evaluating the method and its effect of 2 optical characteristics of transparent base.
It is shown in FIG. 6 to have marked and drawed and is carrying out anti-dazzle by various methods treated to prevent obtained in transparent base
An example of the figure of the relationship of dizzy property index value R (horizontal axis) and dazzles target value G (longitudinal axis).Here, the dazzle of notebook data acquirement
Range index r=10.8 when the shooting of evaluation.
In Fig. 6, the anti-glare index value R of horizontal axis is bigger, and the dazzles target value of the longitudinal axis is smaller, and transparent base is prevented
Dizzy property more improves, and can more inhibit the dazzle of transparent base.
It should be noted that, in order to refer to, having both the reason of good anti-glare and good preventing property of dazzle in Fig. 6
The region for the transparent base thought is indicated by zero label for being shown as ideal.
Here, only considering single optical characteristic such as preventing property of dazzle and selecting candidate among various transparent bases
In the case where transparent base, the transparent base for including in region C shown in the shade of Fig. 6 becomes same selected.That is, in this way
Method in, the transparent base of anti-glare difference is included in selected candidate transparent base.Equally, only consider anti-glare and select saturating
In the case where bright matrix, the transparent base for including in region D shown in the shade of Fig. 6 is similarly selected, dazzle preventing property difference
Transparent base is included in selected candidate.
In contrast, in the case where dazzles target value G as using Fig. 6 is to the related figure of anti-glare R, it can be primary
Consider the optical characteristics of two sides and selectes transparent base appropriate.That is, in such method for selecting, according to purpose and purposes etc.
Transparent base can suitably be selected, that is, about preventing property of dazzle and anti-glare, in a manner of it can play most good characteristic
Selected transparent base.
In this way, once can quantitatively consider 2 optical characteristics, therefore energy in the method for one embodiment of the invention
It is enough more suitably to select transparent base according to purpose or purposes etc. is used.
In addition, in the method for the invention, as the anti-glare index value R and dazzles target value G of transparent base, using number
The value of value.It is unrelated with the subjectivity of observer or prejudice and can be objective and quantitatively sentence accordingly, with respect to anti-glare and dazzle
Break above-mentioned optical characteristics.
(transparent base of one embodiment of the present invention)
Next, illustrating the transparent base of one embodiment of the present invention referring to Fig. 7.
Fig. 7 schematically shows the transparent base (hereinafter simply referred to as " transparent base ") of one embodiment of the present invention
900。
Transparent base 900 is made of glass.The composition of glass is simultaneously not particularly limited, and glass is also possible to such as soda-lime glass
Or alumina silicate glass.
Transparent base 900 has first surface 902 and second surface 904, and first surface 902 is carried out anti-dazzle light processing.
The method of anti-dazzle light processing is not particularly limited.Anti-dazzle light processing be also possible to such as frosted processing, etching process,
Blasting treatment, polishing treatment or silicon coating processing etc..The first surface 902 of transparent base also can have such as 0.05 μm~
The surface roughness (arithmetic average roughness Ra) of 1.0 μm of range.
In addition, the first surface 902 and/or second surface 904 of transparent base 900 can also be by carry out chemical strengthenings
Reason.
The size and shape of transparent base 900 is not particularly limited.For example, transparent base 900 is also possible to square shape
Shape, rectangular shape, circular shape or elliptical shape etc..
It should be noted that in the case where using protective cover of the transparent base 900 as display device, transparent base
900 thickness is preferably relatively thin.For example, the thickness of transparent base 900 is also possible to the range of 0.2mm~2.0mm.
Here, transparent base 900 has using the anti-dazzle of first method above-mentioned (step S110~step S130) measurement
Property index value R be 0.4 or more such feature.Moreover, the transparent base 900, which has, uses second method (step above-mentioned
S210~step S290.It is such for 0.6 or less as the dazzles target value G of range index r=8 including step S265) measurement
Feature.
Anti-glare index value R is preferably 0.6 or more, and more preferably 0.8 or more.
In addition, dazzles target value G is preferably 0.5 hereinafter, more preferably 0.4 hereinafter, further preferably 0.3 or less.
Embodiment
Next, the result of anti-glare evaluation and appraisal of glare that explanation is implemented using various transparent bases.
(being evaluated about anti-glare)
Transparent base anti-dazzle has been carried out treated to first surface by various methods using the following method evaluation
Anti-glare.
As anti-dazzle light processing, frosted processing, etching process, blasting treatment, polishing treatment or silicon coating processing are used.
Moreover, transparent base has used alumina silicate glass.
Firstly, from first surface (i.e. by carry out anti-dazzle treated surface) side by visual observation from each transparent base,
Anti-glare is had rated with 12 grades of 1~grade of grade 12.It should be noted that direction of observation is the thickness relative to transparent base
Direction is spent into 20 ° of direction.
Next, implementing aforementioned step S110 using goniophotometer (GC5000L: Japanese electricity Se industrial group system)
Such operation shown in~step S130 has calculated the anti-glare index value R of each transparent base according to formula (1).
Fig. 8 shows the opinion rating (longitudinal axis) based on visual anti-glare obtained in each transparent base and refers to anti-glare
An example of relationship between scale value R (horizontal axis).
As can be seen from FIG. 8, there is positive correlativity between the two.
Its result implys that anti-glare index value R and the diffusible opinion rating of visual reflection image based on observer
It is inclined to the diffusible situation of reflection image that is corresponding, therefore can judging using anti-glare index value R transparent base.In other words,
It could also say that the reflection image diffusivity that transparent base can objective and be quantitatively judged by using anti-glare index value R.
(evaluation about dazzle)
Next, evaluating used various transparent bases using anti-glare above-mentioned, had rated by the following method
The dazzle of above-mentioned transparent base.
Firstly, each transparent base is directly configured on display device (iPad (registered trademark), resolution 264ppi).This
When, so that the mode that the first surface (having been carried out the surface of anti-dazzle light processing) of each transparent base is located at observer side will be saturating
Bright matrix configuration is on the display apparatus.It should be noted that the image shown from display device is the image of green monochromatic, image
Size be 19.6cm × 14.6cm.
Next, in this case, each transparent base from first surface sidelong glance view, with the 11 of 0~grade of grade 10
Grade has rated dazzle.The case where dazzle is not almost seen in the expression of grade 0, grade 10 indicates the highly significant situation of dazzle.And
Grade point between and is in the more big then dazzle of numerical value more bigger tendency.
Next, being implemented above-mentioned using SMS-1000 device (Display-Messtechnik&Systeme corporation)
It is operated shown in step S210~step S290 (including step S265), according to formula (3), has calculated that the dazzle of each transparent base refers to
Scale value G.It should be noted that the transparent base for having carried out anti-dazzle light processing as benchmark, at VRD140 anti-dazzle
It manages glass (Asahi Glass Co., Ltd's system).
Display device uses iPad above-mentioned (registered trademark), and the distance between solid-state imager and transparent base d are set
For 540mm.Distance d is equivalent to r=10.8 by range index r expression.
Fig. 9 shows the dazzles target value G (longitudinal axis) obtained in each transparent base and the grade based on visual dazzle is (horizontal
Axis) between relationship an example.
As can be seen from FIG. 9, there is positive correlativity between the two.
Its result implys that dazzles target value G is opposite with the tendency of judgement result of visual dazzle based on observer
It answers, therefore, the case where capable of judging the dazzle of transparent base using dazzles target value G.In other words, it may be said that be by using dizzy
Light index value G being capable of dazzle that is objective and quantitatively judging transparent base.
Anti-glare index value R and dazzles target value G are able to use respectively as the anti-glare of transparent base in this way, confirming
And dazzle quantitative index the case where.
Industrial applicibility
The present invention can be used in as such as LCD device, OLED device, PDP device and planar display respectively
The optical characteristics evaluation for the transparent base being arranged in kind display device etc..
In addition, this application claims based on the Japanese Patent Application 2014-100343 to file an application on May 14th, 2014
Number priority, and by full content that the Japan applies by referring to and quote in the application.
Label declaration
210 transparent bases
212 first surfaces
214 second surfaces
300 measurement devices
350 light sources
362 first light
364 reflected lights
370 detectors
410 first images
The corresponding region 420-1~420-9
430 first Luminance Distributions
900 transparent bases
902 first surfaces
904 second surfaces
qiLuminance Distribution ingredient
Claims (8)
1. a kind of method for the optical characteristics for evaluating transparent base, which is characterized in that
Sequence differently has following steps:
Obtain transparent base quantification anti-glare index value the step of, the transparent base have first and second surface and
The first surface has been carried out anti-dazzle light processing；And
The step of obtaining the dazzles target value of the quantification of the transparent base,
The anti-glare index value of the quantification obtains as follows:
(a) from first and second surface transparent base the first surface lateral edge relative to the transparent base
Thickness direction irradiates the first light at 20 ° of direction, and measures the step of the brightness of the 20 ° of positive reflection lights reflected by the first surface
Suddenly；
(b) change the light angle of the reflected light reflected by the first surface in the range of -20 °~+60 °, measurement by
The step of brightness of whole reflected lights of the first surface reflection；And
(c) according to formula below (1), the step of calculating anti-glare index value R,
Anti-glare index value R=(brightness of -20 ° of positive reflection lights of brightness of whole reflected lights)/(brightness of whole reflected lights) formula
(1),
The dazzles target value of the quantification is obtained by following step:
(A) transparent base is configured on said display means in a manner of making the second surface be located at display device side
The step of；
(B) in the state of opening the display device, the transparent base is shot using solid-state imager, obtains first
The step of image, and by the solid-state imager between the transparent base at a distance from be set as d, by the solid-state image pickup
When the focal length of element is set as f, step that the range index r (=d/f) when shooting is 8 or more；
(C) the step of the first Luminance Distribution being formed according to the first image of the acquirement；
(D) it moves the transparent base along the direction substantially parallel with the second surface, keeps the transparent base opposite
In the mobile step of the display device；
(E) the step of repeating (B) and (C), the step of the second Luminance Distribution is formed according to the second image of acquirement；
(F) according to the difference of first Luminance Distribution and second Luminance Distribution, the step of difference Luminance Distribution Δ S is found out
Suddenly；
(G) according to the difference Luminance Distribution Δ S, average brightness profile Δ S is calculatedaveAnd standard deviation sigma, and according to below
The step of formula (2) obtains output valve A,
Output valve A=standard deviation sigma/average brightness profile Δ SaveFormula (2)
(H) the step of (A)~(G) described in implementing in the anti-dazzle of benchmark treated transparent base, and replace output valve A and
The step of obtaining referring to output valve Q, and should (H) the step of be (A)~(G) the step of before implement or with it is described
(A)~(G) the step of the step of, implements side by side；And
(I) the step of dazzles target value G being found out according to formula below (3),
Dazzles target value G=(output valve A)/(referring to output valve Q) formula (3).
2. the method according to claim 1, wherein
Before (G) the step of, implement step as described below: among the difference Luminance Distribution Δ S, by origin in institute
The ingredient filtering for stating display device removes, and obtains actual effect difference Luminance Distribution Δ SeThe step of,
In (G) the step of, replaces the difference Luminance Distribution Δ S and use the actual effect difference Luminance Distribution Δ Se。
3. method according to claim 1 or 2, which is characterized in that
The anti-glare index value is obtained using goniometer.
4. method according to claim 1 or 2, which is characterized in that
The display device is in the group being made of LCD device, OLED device, PDP device and planar display
One device.
5. method according to claim 1 or 2, which is characterized in that
The display device has the resolution of 132ppi or more.
6. method according to claim 1 or 2, which is characterized in that
The transparent base is made of soda-lime glass or alumina silicate glass.
7. according to the method described in claim 6, it is characterized in that,
At least one party in first and second surface of the transparent base is by carry out chemical intensification treatment.
8. method according to claim 1 or 2, which is characterized in that
The anti-dazzle light processing by the first surface for the transparent base apply selected from by frosted processing, etching process,
Blasting treatment, polishing treatment and silicon coating handle at least one processing method in the group constituted to implement.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014100343 | 2014-05-14 | ||
| JP2014-100343 | 2014-05-14 | ||
| CN201580024709.8A CN106461502B (en) | 2014-05-14 | 2015-03-16 | Method for evaluating optical characteristics of transparent substrate and transparent substrate |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580024709.8A Division CN106461502B (en) | 2014-05-14 | 2015-03-16 | Method for evaluating optical characteristics of transparent substrate and transparent substrate |
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| CN201910166872.8A Pending CN110057547A (en) | 2014-05-14 | 2015-03-16 | The method for evaluating the optical characteristics of transparent base |
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| KR (1) | KR102321551B1 (en) |
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| JP6969156B2 (en) * | 2016-05-30 | 2021-11-24 | Ａｇｃ株式会社 | Board with printed layer, its manufacturing method, and display device |
| JP6973250B2 (en) * | 2018-04-04 | 2021-11-24 | 日本電気硝子株式会社 | Evaluation method of transparent articles and manufacturing method of transparent articles |
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| TWI656332B (en) | 2019-04-11 |
| JP6583479B2 (en) | 2019-10-02 |
| JPWO2015174132A1 (en) | 2017-04-20 |
| TW201543019A (en) | 2015-11-16 |
| CN106461502A (en) | 2017-02-22 |
| TW201913060A (en) | 2019-04-01 |
| KR20170008224A (en) | 2017-01-23 |
| KR102321551B1 (en) | 2021-11-03 |
| WO2015174132A1 (en) | 2015-11-19 |
| JP2018163160A (en) | 2018-10-18 |
| JP6341210B2 (en) | 2018-06-13 |
| CN106461502B (en) | 2020-01-24 |
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Application publication date: 20190726 |