CN206377498U - Glass light guide plate - Google Patents
Glass light guide plate Download PDFInfo
- Publication number
- CN206377498U CN206377498U CN201590000549.9U CN201590000549U CN206377498U CN 206377498 U CN206377498 U CN 206377498U CN 201590000549 U CN201590000549 U CN 201590000549U CN 206377498 U CN206377498 U CN 206377498U
- Authority
- CN
- China
- Prior art keywords
- face
- guide plate
- light guide
- glass
- glass light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Planar Illumination Modules (AREA)
- Glass Compositions (AREA)
Abstract
A kind of glass light guide plate, it has mutual the 1st opposite face and the 2nd face and at least one the 1st end face being arranged between the 1st face and the 2nd face, wherein, the glass has the 1st face or the 2nd face and at least one the 1st fillet surface of the 1st end face of connecting, and the surface roughness Ra of the 1st fillet surface is less than 0.4 μm.
Description
Technical field
The present invention relates to the manufacture method of a kind of glass and glass.
Background technology
In recent years, it is provided with carrying type information terminal representated by LCD TV, tablet terminal or smart mobile phone etc.
Liquid crystal display device.Liquid crystal display device has sheet light emitting apparatus and configuration as back lighting device function at this
The liquid crystal panel of the light-emitting surface side of sheet light emitting apparatus.
There is full run-down type and edge-illumination type in sheet light emitting apparatus, but many edges minimized using achievable light source are shone
Bright type.The sheet light emitting apparatus of edge-illumination type has light source, light guide plate, reflector plate and diffusion sheet etc..
Incidence surface of the light self-forming in the side of light guide plate from light source is incident in light guide plate.Light guide plate with liquid crystal
Multiple pips are formed with the opposite light-emitting face of panel and the light reflection surface of opposite side.Reflector plate is with opposite with light reflection surface
Mode configure, diffusion sheet is configured in the mode opposite with light-emitting face.
Light from light source incidence to light guide plate is reflected and advanced, from light-emitting face outgoing by pip and reflector plate.From this
The light of light-emitting face outgoing is incident to liquid crystal panel after being spread through diffusion sheet.
As the material of the light guide plate, usable transmitance is higher and glass of excellent heat resistance is (for example, see patent text
Offer 1,2).
<Prior art literature>
<Patent document>
Patent document 1：(Japan) JP 2013-093195 publications
Patent document 2：(Japan) JP 2013-030279 publications
The content of the invention
<The technical problems to be solved by the invention>
The liquid crystal display device for being equipped on carrying type information terminal etc. expects slimming.It is thin with the liquid crystal display device
The requirement of type, the glass as light guide plate also requires that slimming.
If however, glass is thinned, the intensity of glass can be reduced.If in addition, the angle of light-emitting face and incidence surface
Fall what corner portion of portion and light reflection surface and incidence surface etc. (following, to be also collectively referred to as in the corner portion " edge part ") at right angles intersected
Structure, then when light guide plate (glass) is mounted on sheet light emitting apparatus or liquid crystal display device, sometimes edge part and other
Construct can contact and damage edge part.
Therefore, carry out in edge part formation chamfered section.Chamfered section shape by the edge part progress grinding processing to glass
Into.When the grinding is processed, cullet (chips of glass) are produced from glass.When the cullet are attached to the glass used as light guide plate
When on glass, incident light can be reflected in the same manner as pip.
Because such incident light reflects on cullet, and the light reflected by cullet with by set reflection point reflection
Reflected light is together from light-emitting face outgoing.Thus, brightness disproportionation can be produced in light-emitting face, uses the liquid crystal display of the light guide plate
The display quality of device can be reduced.
One of exemplary purpose of embodiments of the present invention is the manufacture method for providing a kind of glass and glass, its
Cullet yield can be suppressed.
<Scheme for solving technical problem>
According to an embodiment of the invention there is provided a kind of glass, its have mutually opposite the 1st face and the 2nd face, with
And at least one the 1st end face between the 1st face and the 2nd face is arranged on, wherein, the glass has connection described
1st face or the 2nd face and at least one the 1st fillet surface of the 1st end face, the surface roughness Ra of the 1st fillet surface
For less than 0.4 μm.
In addition, according to another implementation of the invention there is provided a kind of manufacture method of glass, it includes：Prepare tool
There are mutual the 1st opposite face and the 2nd face and at least one the 1st end face being arranged between the 1st face and the 2nd face
And at least one the 2nd end face glass baseplate the step of；1st chamfering step, its described 2nd end face to the glass baseplate enters
Row chamfer machining；Mirror finish step, its described 1st end face to the glass baseplate carries out mirror finish；And the 2nd chamfering
Step, it carries out chamfer machining by the 1st end face to the glass baseplate used in the mirror finish step,
The 1st face or the 2nd face and at least one the 1st fillet surface of the 1st end face are connected so as to be formed, and makes the described 1st
The surface roughness Ra of fillet surface is less than 0.4 μm.
<The effect of invention>
According to the embodiment of the present invention, cullet yield can be suppressed, prevent from producing when glass is used as into light guide plate
Raw brightness disproportionation.
Brief description of the drawings
Fig. 1 is that the summary for representing the liquid crystal display device using light guide plate is used as the glass of an embodiment is constituted
Figure.
Fig. 2 is the figure for the light reflection surface for representing light guide plate.
Fig. 3 is the stereogram of light guide plate.
Fig. 4 is the figure for being illustrated to the fillet surface formed on light guide plate.
The step of Fig. 5 is the manufacture method as the glass of an embodiment is schemed.
Fig. 6 is the figure illustrated for the cut-out structure of the manufacture method to the glass as an embodiment.
Fig. 7 is the figure for being illustrated to mirror finish step.
Fig. 8 is the figure of the surface roughness and the relation of cullet yield that represent incident side chamfered section.
Fig. 9 is the figure illustrated for the assay method to cullet yield.
Embodiment
Then, the non-limiting exemplary embodiment referring to the drawings to the present invention is illustrated.
It should be noted that in the record of all accompanying drawings, for identical or corresponding part or components marking it is identical or
Corresponding symbol, and the repetitive description thereof will be omitted.In addition, for accompanying drawing, as long as not specifying, then not to represent part or part
Between compare for the purpose of.Therefore, can be according to following non-limiting embodiment, by this for specific size
Art personnel determine.
In addition, embodiment described below is the embodiment of exemplary embodiment and non-limiting invention,
Illustrated all features or its combination are not necessarily limited to the essential feature of the present invention in embodiment.
Fig. 1 represents the liquid crystal display device 1 using light guide plate is used as the glass of an embodiment of the invention.Liquid
Crystal device 1 is realized such as being mounted in carrying type information terminal on small-sized and slimming electronic equipment.
Liquid crystal display device 1 has liquid crystal panel 2 and sheet light emitting apparatus 3.
Liquid crystal panel 2 has is laminated with oriented layer, transparency electrode, glass in the way of the liquid crystal layer for clipping the center of being disposed in
The structure of substrate and polarizing filter.In addition, the one side in liquid crystal layer is equipped with colored filter.By applying to transparency electrode
Driving voltage and make the molecule of liquid crystal layer around being rotated with optical axis, by specifically being shown around the rotation with optical axis.
Sheet light emitting apparatus 3 uses edge-illumination type to realize miniaturization and be thinned.Sheet light emitting apparatus 3 has light source
4th, light guide plate 5, reflector plate 6, diffusion sheet 7 and pip 10A~10C.
The light for being incident to light guide plate 5 from light source 4 is reflected and advanced by pip 10A~10C and reflector plate 6, from light guide plate 5
Light-emitting face 51 outgoing opposite with liquid crystal panel 2.From light incidence after the diffusion of diffusion sheet 7 of the outgoing of light-emitting face 51
To liquid crystal panel 2.
Light source 4 is not particularly limited, but thermionic-cathode tube, cold-cathode tube or LED (Light Emitting can be used
Diode：Light emitting diode).The light source 4 is configured in the mode opposite with the incidence surface 53 of light guide plate 5.
In addition, in order to improve the incident efficiency from the light of the radial transmitting of light source 4 to light guide plate 5, at the back side of light source 4
Side is provided with reflector 8.
Reflector plate 6 has the structure of light reflecting member with the surface coating in resin sheets such as acrylic resins.The reflector plate 6
It is disposed in the light reflection surface 52 and non-incidence surface 54~56 of light guide plate 5.Light reflection surface 52 is that light guide plate 5 is with light-emitting face 51
The face of opposite side.Non- incidence surface 54~56 be light reflection surface 52 end face among end face in addition to incidence surface 53.Need
It is bright, if without especially improving incident efficiency, can also be set to reflector plate 6 is not disposed in into the knot on non-incidence surface 54~56
Structure.
Milky acrylic resin made membrane etc. can be used in diffusion sheet 7.Because diffusion sheet 7 goes out the light from light guide plate 5
The light diffusion of the outgoing of face 51 is penetrated, therefore, it is possible to irradiate the uniform light in the absence of brightness disproportionation to the rear side of liquid crystal panel 2.Need
It is noted that reflector plate 6 and diffusion sheet 7 are for example fixed on the ad-hoc location of light guide plate 5 by sticking together.
Secondly, light guide plate 5 is illustrated.
Light guide plate 5 is formed by the higher glass of transparency.In the present embodiment, as the glass as light guide plate 5
Material, use the oxide glass of multicomponent system.
Specifically, as light guide plate 5, using a kind of following glass component, its effective path length is 5cm~200cm,
The average internal transmitance of visible-range (wavelength 380nm~780nm) in effective path length is more than 80%, and JIS
The Y value of the tristimulus values in XYZ colour systems in Z8701 (attached book) is more than 90%.Y value be according to Y=Σ (S (λ) ×
Y (λ)) obtain.Herein, S (λ) is the transmitance in each wavelength, and y (λ) is the weight coefficient of each wavelength.Therefore, Σ (S (λ) × y
(λ)) it is the summation that the weight coefficient of each wavelength is multiplied with its transmitance.It should be noted that y (λ) and eyes retina
M cones (G cones/green) correspondence among cell, reacts most strong under wavelength 535nm light.Being averaged for visible-range is interior
Portion's transmitance is preferably more than 82%, more preferably more than 85%, more preferably more than 90% in effective path length.
Y value is preferably more than 91%, more preferably more than 92%, more preferably more than 93% in effective path length.
In addition, glass is in other performance, in wavelength 400nm~700nm under conditions of effective path length 50mm
Average internal transmitance be preferably more than 90%.Therefore, it can strongly suppress to be incident to the decay of the light of glass.In effective light path
The average internal transmitance among wavelength 400nm~700nm under conditions of length 50mm is preferably more than 92%, more preferably
More than 95%, more preferably more than 98%, particularly preferably more than 99%.
Average internal among wavelength 400nm~700nm under conditions of the effective path length 50mm of glass is passed through
Rate can be determined using following methods.First, obtained by the way that glass is cut off in the direction vertical with interarea from from glass
Center portion point is with longitudinal 50mm × transverse direction 50mm selection of dimension and the 1st and the 2nd mutually opposite section (end face) is flat with arithmetic
The sample S that the mode of equal roughness Ra≤0.03 μm is setA.In sample SAIn, from above-mentioned 1st section to normal direction
On 50mm length in, pass through UV, visible light infrared spectrophotometer (UH4150, Hitachi new and high technology scientific company manufacture) and utilize
Slit etc. makes to be measured after the beamwidth of incident light is narrower compared with thickness of slab.By from the effective path length 50mm's so obtained
Under the conditions of transmitance in remove caused by the reflection on surface lose so that under conditions of obtaining effective path length 50mm
Inside transmitance.
For the total amount A of the content of the iron of the glass as light guide plate 5, preferably below 100 mass ppm, this is due to
It meets the inside transmitance in above-mentioned wavelength 400nm~700nm, more preferably below 40 mass ppm, more preferably 20
Below quality ppm.On the other hand, for the glass as glass plate iron content total amount A, preferably 5 mass ppm with
On, this, which is due to it, improves the meltability of glass in the oxide glass manufacture of multicomponent system, more preferably 8 mass ppm with
On, more preferably more than 10 mass ppm.It should be noted that the total amount A of the content of the iron of the glass as light guide plate 5
It can be adjusted according to the amount of the iron added in glass manufacture.
In this manual, it regard the total amount A of the content of the iron of glass as Fe2O3Content represent, but not in glass
The iron of presence is as Fe3+(iron of trivalent) is present.Generally, there is Fe simultaneously in glass3+With Fe2+(iron of divalent).Fe2+And
Fe3+There is absorption coefficient, but Fe in wavelength 400nm~700nm scope2+Absorption coefficient (11cm-1Mol-1) compared with Fe3+'s
Absorption coefficient (0.96cm-1Mol-1) big 1 digit, therefore, Fe2+Make the inside transmitance in wavelength 400nm~700nm further
Reduction.It is therefore preferable that Fe2+Content it is less, this is due to that it improves inside transmitance in wavelength 400nm~700nm.
The Fe of glass as light guide plate 52+Content B be preferably that below 20 mass ppm, this is due to that it meets above-mentioned ripple
Inside transmitance in long 400nm~700nm, more preferably below 10 mass ppm, more preferably below 5 mass ppm.
On the other hand, the Fe of the glass as light guide plate 52+Content B be preferably more than 0.01 mass ppm, this be due to it more into
The meltability of glass is improved when dividing the oxide glass manufacture for being, more preferably more than 0.05 mass ppm is more preferably
More than 0.1 mass ppm.
It should be noted that the Fe of the glass as light guide plate 52+Content B can be according to the oxygen added in glass manufacture
Amount or melting temperature of agent etc. are adjusted.For the specific species of oxidant and addition added in glass manufacture
It will hereinafter be described.Fe2O3Content A be using fluorescent X-ray determine obtain be scaled Fe2O3Full iron contain
Measure (quality ppm).Fe2+Content B be according to ASTM C169-92 (2011) and determine.It should be noted that determined
Fe2+Content B be to be scaled Fe2O3And represent.
The preferred concrete example of the composition of glass described below as light guide plate 5.But, the glass as light guide plate 5
Composition be not limited to this.
One configuration example (configuration example E of the glass as light guide plate 5A) represented with the quality percentage of oxide benchmark,
Include 60%~80% SiO2, 0%~7% Al2O3, 0%~10% MgO, 0%~20% CaO, 0%~15%
SrO, 0%~15% BaO, 3%~20% Na2O, 0%~10% K2The mass ppm's of O and 5 mass ppm~100
Fe2O3。
Another configuration example (configuration example E of glass as light guide plate 5B) with the quality percentage table of oxide benchmark
Show, include 45%~80% SiO2, more than the Al of 7% and less than 30%2O3, 0%~15% B2O3, 0%~15%
MgO, 0%~6% CaO, 0%~5% SrO, 0%~5% BaO, 7%~20% Na2O, 0%~10% K2O、
0%~10% ZrO2And the mass ppm of 5 mass ppm~100 Fe2O3。
Another configuration example (configuration example E of glass as light guide plate 5C) with the quality percentage table of oxide benchmark
Show, include 45%~70% SiO2, 10%~30% Al2O3, 0%~15% B2O3, total 5%~30% MgO,
CaO, SrO and BaO, total 0% less than 3% Li2O、Na2O and K2The mass ppm's of O and 5 mass ppm~100
Fe2O3。
Hereinafter, to the group of each composition of the composition of the glass as light guide plate 5 of the present embodiment with mentioned component
Illustrated into scope.It should be noted that the quality percentage that the unit of the content respectively constituted is oxide benchmark is represented
Or quality ppm is represented, it is only meant as respectively " % " or " ppm ".
SiO2For the principal component of glass.In order to keep the weatherability and devitrification characteristic of glass, SiO2Content with oxide-base
Accurate quality percentage is represented, in configuration example EAIn be preferably more than 60%, more preferably more than 63%, in configuration example EBIn it is excellent
More than 45%, more preferably more than 50% is elected as, in configuration example ECIn be preferably more than 45%, more preferably more than 50%.
On the other hand, in order that melting easy, and make bubble quality good, also for the ferrous iron (Fe in glass2+)
Content suppress relatively low and make optical characteristics good, SiO2Content in configuration example EAIn be preferably less than 80%, more preferably
Less than 75%, in configuration example EBIn be preferably less than 80%, more preferably less than 70%, in configuration example ECIn be preferably 70% with
Under, more preferably less than 65%.
Al2O3In configuration example EBAnd ECIn be improve glass weatherability required composition.In the glass of present embodiment
In, in order to maintain required weatherability, Al in practicality2O3Content in configuration example E0In be preferably more than 1%, more preferably 2%
More than, in configuration example EBIn be preferably greater than 7%, more preferably more than 10%, in configuration example ECIn be preferably more than 10%, more
Preferably more than 13%.
But, in order to by ferrous iron (Fe2+) content be suppressed to relatively low, make optical characteristics good, and make bubble quality good
It is good, Al2O3Content in configuration example EAIn be preferably less than 7%, more preferably less than 5%, in configuration example EBIn be preferably 30%
Hereinafter, more preferably less than 23%, in configuration example ECIn be preferably less than 30%, more preferably less than 20%.
B2O3It is the melting for promoting frit and the composition for improving mechanical property or weatherability, but in order to not produce because waving
The defect, B such as generation, erosion of furnace wall of arteries and veins reason (ream) caused by hair2O3Content in glass EAIn be preferably less than 5%, more
Preferably less than 3%, in configuration example EBAnd ECIn be preferably less than 15%, more preferably less than 12%.
Li2O、Na2O and K2The alkali metal oxides such as O are the melting to promoting frit and adjustment thermal expansion, stickiness etc.
Useful composition.
Therefore, Na2O content is in configuration example EAIn be preferably more than 3%, more preferably more than 8%.Na2O content exists
Configuration example EBIn be preferably more than 7%, more preferably more than 10%.But, clarification and holding institute during in order to keep melting
The bubble quality for the glass to be manufactured, Na2O content is in configuration example EAAnd EBIn be preferably be set to less than 20%, further preferably
To be set to less than 15%, in configuration example ECIn be preferably be set to less than 3%, be more preferably set to less than 1%.
In addition, K2O content is in configuration example EAAnd EBIn be preferably less than 10%, more preferably less than 7%, in configuration example
ECIn be preferably less than 2%, more preferably less than 1%.
In addition, Li2O is any condition, but in order that vitrifying is easier to, using as the impurity from raw material comprising
Iron content be suppressed to it is relatively low and relatively low for job order cost is suppressed to, and in configuration example EA、EBAnd ECIn, less than 2% can be contained
Li2O。
In addition, in order to keep the bubble quality that is clarification and keeping the glass to be manufactured during melting, the alkali metal oxygen
Total content (Li of compound2O+Na2O+K2O) in configuration example EAAnd EBIn be preferably 5%~20%, more preferably 8%~15%,
In configuration example ECIn be preferably 0%~2%, more preferably 0%~1%.
The alkaline-earth metals oxides such as MgO, CaO, SrO and BaO are the meltings to promoting frit and adjustment heat is swollen
The useful composition such as swollen, stickiness.
MgO has stickiness during reduction glass melting and promotes the effect of melting.In addition, MgO has reduction proportion and made
Glass plate is not likely to produce the effect of defect, therefore, in configuration example EA、EBAnd ECIn can contain the MgO.In addition, in order to reduce glass
Thermal coefficient of expansion and make devitrification characteristic good, MgO content is in configuration example EAIn be preferably less than 10%, more preferably 8%
Hereinafter, in configuration example EBIn be preferably less than 15%, more preferably less than 12%, in configuration example ECIn be preferably less than 10%, more
Preferably less than 5%.
CaO is the composition for promoting the melting and adjustment stickiness, thermal expansion of frit etc., therefore, in configuration example EA、EBAnd
ECIn can contain the CaO.In order to obtain above-mentioned effect, in configuration example EAIn, CaO content is preferably more than 3%, more preferably
More than 5%.In addition, in order that devitrification is good, in configuration example EAIn, preferably less than 20%, more preferably less than 10%, in structure
Into example EBIn be preferably less than 6%, more preferably less than 4%.
SrO has increase thermal coefficient of expansion and reduces the effect of the high-temperature viscosity of glass, in order to obtain the effect, is constituting
Example EA、EBAnd ECIn can contain SrO.But, relatively low in order to which the thermal coefficient of expansion of glass is suppressed to, SrO content is in configuration example
EAAnd ECIn be preferably be set to less than 15%, less than 10% is more preferably set to, in configuration example EBIn be preferably be set to less than 5%,
More preferably it is set to less than 3%.
BaO has increase thermal coefficient of expansion in the same manner as SrO and reduces the effect of the high-temperature viscosity of glass, in order to be somebody's turn to do
Effect, in EA、EBAnd ECIn can contain BaO.But, it is relatively low in order to which the thermal coefficient of expansion of glass is suppressed to, in configuration example EAAnd
ECIn be preferably be set to less than 15%, less than 10% is more preferably set to, in configuration example EBIn be preferably to be set to less than 5%, it is more excellent
Elect as and be set to less than 3%.
In addition, it is relatively low in order to which thermal coefficient of expansion is suppressed to, make devitrification characteristic good, and maintain intensity, the alkaline earth eka-gold
Belong to total content (MgO+CaO+SrO+BaO) of oxide in configuration example EAIn be preferably 10%~30%, more preferably 13%
~27%, in configuration example EBIn be preferably 1%~15%, more preferably 3%~10%, in configuration example ECIn be preferably 5%~
30%, more preferably 10%~20%.
In the glass composition of the glass as light guide plate 5 of present embodiment, in order to improve the heat resistance and table of glass
Surface hardness, in configuration example EA、EBAnd ECIn, it can contain less than 10% ZrO as any condition2, preferably containing less than 5%
ZrO2.By by ZrO2Content be set to less than 10%, glass becomes to be difficult devitrification.
In the glass composition of the glass as light guide plate 5 of present embodiment, in order to improve the meltability of glass, also may be used
In configuration example EA、EBAnd ECIn the Fe containing 5ppm~100ppm2O3.It should be noted that Fe2O3Amount preferred scope be as
The upper scope.
In addition, the glass as light guide plate 5 of present embodiment can also contain SO3It is used as fining agent.In this case, SO3
Content represents preferably greater than 0% and for less than 0.5% with quality percentage.SO3Content is more preferably less than 0.4%, enters one
Step is preferably less than 0.3%, is still more preferably less than 0.25%.
In addition, the glass as light guide plate 5 of present embodiment can also contain Sb2O3、SnO2And As2O3One or more of
It is used as oxidant and fining agent.In this case, Sb2O3、SnO2Or As2O3One or more of content with quality percentage table
Show preferably 0%~0.5%.Sb2O3、SnO2Or As2O3One or more of content be more preferably less than 0.2%, further
Preferably less than 0.1%, still more preferably to contain substantially no.
But, due to Sb2O3、SnO2And As2O3Played a role as the oxidant of glass, therefore be alternatively regulation glass
The Fe of glass2+Amount and be added within the above range.But, in terms of environment, preferably contain substantially no
As2O3。
In addition, the glass as light guide plate 5 of present embodiment can also contain NiO.In the case of containing NiO, NiO
As coloring components function, therefore, NiO content relative to the resultant that above-mentioned glass is constituted be preferably be set to 10ppm with
Under.Especially, for the viewpoint of inside transmitance reduction for not making the glass plate in wavelength 400nm~700nm, NiO is preferred
To be set to below 1.0ppm, below 0.5ppm is more preferably set to.
The glass as light guide plate 5 of present embodiment can also contain Cr2O3.Containing Cr2O3In the case of, Cr2O3
It is used as coloring components function, therefore, Cr2O3Content relative to the resultant that above-mentioned glass is constituted be preferably be set to 10ppm with
Under.Especially, for the viewpoint of inside transmitance reduction for not making the glass plate in wavelength 400nm~700nm, Cr2O3It is preferred that
To be set to below 1.0ppm, below 0.5ppm is more preferably set to.
The glass as light guide plate 5 of present embodiment can also contain MnO2.Containing MnO2In the case of, MnO2Also make
To absorb the composition function of visible ray, therefore, MnO2Content be preferably set to relative to the resultant that above-mentioned glass is constituted
Below 50ppm.Especially, for the viewpoint of inside transmitance reduction for not making the glass plate in wavelength 400nm~700nm,
MnO2It is preferably set to below 10ppm.
The glass as light guide plate 5 of present embodiment can also include TiO2.Containing TiO2In the case of, TiO2Also make
To absorb the composition function of visible ray, therefore, TiO2Content be preferably set to relative to the resultant that above-mentioned glass is constituted
Below 1000ppm.For the viewpoint of inside transmitance reduction for not making the glass plate in wavelength 400nm~700nm, TiO2More
Content is preferably set to below 500ppm, below 100ppm is particularly preferably set to.
The glass as light guide plate 5 of present embodiment can also include CeO2。CeO2Redox effect with reduction iron
Really, Fe can be reduced2+Measure the ratio relative to Total iron content.On the other hand, the redox of iron is reduced to also for suppression and be less than
3%, CeO2Content be preferably set to below 1000ppm relative to the resultant that above-mentioned glass is constituted.In addition, CeO2Content it is more excellent
Choosing is set to below 500ppm, is further preferably set to below 400ppm, is particularly preferably set to below 300ppm, is most preferably set to
Below 250ppm.
The glass as light guide plate 5 of present embodiment can also be included and is selected from by CoO, V2O5And in the groups that are constituted of CuO
At least one kind of composition.In the case of containing the composition, also serve as absorbing the composition function of visible ray, therefore, mentioned component
Content be preferably set to below 10ppm relative to the resultant that above-mentioned glass is constituted.Especially, in order to do not make wavelength 400nm~
The inside transmitance reduction of glass plate in 700nm, preferably contains substantially no those compositions.
However, the glass as light guide plate 5 is not limited to this.
As shown in Fig. 1 and Fig. 2~Fig. 4, the light guide plate 5 has light-emitting face 51 (the 1st face), light reflection surface 52 the (the 2nd
Face), incidence surface 53 (the 1st end face), non-incidence surface 54~56 (the 2nd end face), incident side fillet surface 57 (the 1st fillet surface) and non-
Incident side fillet surface 58 (the 2nd fillet surface).
Light-emitting face 51 is the face opposite with liquid crystal panel 2.In the present embodiment, state of the light-emitting face 51 in vertical view
Have under (state that light-emitting face 51 is observed from top) rectangular-shaped.However, the shape of light-emitting face 51 is not limited to rectangle
Shape.
The size of the light-emitting face 51 is accordingly determined with liquid crystal panel 2, therefore, is not particularly limited, for example, it is preferable to
For 300mm × more than 300mm size, more preferably 500mm × more than 500mm size.Light guide plate 5 has higher firm
Property, therefore size is more big more plays its effect.
Light reflection surface 52 is the face opposite with light-emitting face 51.Light reflection surface 52 with relative to light-emitting face 51 turn into it is parallel
Mode formed.In addition, the shape and size of light reflection surface 52 with light-emitting face 51 as identical mode to form.
However, light reflection surface 52 also can need not be parallel relative to light-emitting face 51, also can have be provided with jump or gradient
Composition.In addition, the size of light reflection surface 52 can also be set to the size different from light-emitting face 51.
As shown in Fig. 2 being formed with pip 10A~10C on light reflection surface 52.Pip 10A~10C is, for example, will
White ink is printed as the pip of point-like.Brightness from the incident light of incidence surface 53 is stronger, by the internal reflection of light guide plate 5 simultaneously
Preceding and then luminance-reduction.
Therefore, in the present embodiment, from incidence surface 53 towards the direction of advance (right towards in Fig. 1 and Fig. 2 of light
To) make pip 10A~10C's of different sizes.Specifically, the diameter of the pip 10A in the region of incidence surface 53
(LA) be set as it is smaller, with from close to the incidence surface 53 region towards light direction of advance pip 10B diameter (LB)
And radius (the L of pip 10C diameterC) become big mode and set (LA＜ LB＜ LC)。
So, by making each pip 10A size change towards the direction of advance of the light in light guide plate 5, it can make
From the brightness uniformity of the emergent light of the outgoing of light-emitting face 51, so as to suppress the generation of brightness disproportionation.It should be noted that logical
The size instead of each pip 10A is crossed, and each pip 10A number density is become towards the direction of advance of the light in light guide plate 5
Change, can also obtain equal effect.In addition, by the formation of light reflection surface 52 as reflected the groove of incident light to replace reflecting
Point 10A, can also obtain equal effect.
In the present embodiment, 4 end faces are formed between light-emitting face 51 and light reflection surface 52.In 4 end faces, make
It is face that the light from above-mentioned light source 4 is incided for the incidence surface 53 of the 1st end face.It is used as the non-incidence surface 54 of the 2nd~the 4th end face
~56 be light from light source 4 it is incident less than face.
Incidence surface 53 is preferably by mirror finish when forming the manufacture of glass of light guide plate 5.Specifically, incidence surface 53
Arithmetic average roughness (center line average roughness) Ra on surface be preferably less than 0.10 μm, more preferably less than 0.03 μ
M, particularly preferably more preferably less than 0.01 μm, less than 0.005 μm.Thus, enter from light source 4 in light to light guide plate 5
The light efficiency of light is enhanced.The thickness (in Fig. 4 shown in arrow W) of incidence surface 53 is set as by being mounted in sheet light emitting apparatus 3
On liquid crystal display device 1 requirement thickness.
It should be noted that in the following description, when being recited as the situation of surface roughness Ra, referring to utilize JIS B
The arithmetic average roughness (center line average roughness) of the gained of 0601~JIS B 0031.
Incident side chamfering is formed between light-emitting face 51 and incidence surface 53 and between light reflection surface 52 and incidence surface 53
Face 57.
In the present embodiment, show between light-emitting face 51 and incidence surface 53 and light reflection surface 52 and incidence surface
Both between 53 are formed with the example of incident side fillet surface 57, but can also be set to only in any one formation incident side fillet surface 57
Composition.
In the sheet light emitting apparatus 3 of miniaturization and slimming is required as in this embodiment, more satisfactory is to make leaded light
The thickness of plate 5 is also relatively thin.Therefore, the thickness of the light guide plate 5 of present embodiment is below 10mm.However, being set to not in leaded light
Plate 5 sets incident side fillet surface 57 and during composition with corner portion, the light guide plate such as there is in the assembling of sheet light emitting apparatus 3
The situation that 5 corner portion contacts and damaged with other constructs, in this case, the intensity of light guide plate 5 may be reduced.Cause
This, the thickness of the light guide plate 5 of present embodiment is more than 0.5mm, further incidence surface 53 upper limb and lower edge be formed with into
Light side fillet surface 57.
The thickness of light guide plate 5 is more preferably more than 0.7mm, more preferably more than 1.0mm, much further preferably from
1.5mm more than.It is more than 0.7mm by the thickness of light guide plate 5, results in sufficient rigidity.In addition, the thickness of light guide plate 5
More preferably below 3.0mm, thereby, it is possible to contribute to the slimming of face litillumination devices.
In order to improve the light efficiency of the light from light source 4 into light guide plate 5, it is necessary to expand the area of incidence surface 53.Therefore,
Incident side fillet surface 57 is more satisfactory to be smaller, therefore, in the present embodiment, and carrying out chamfering as incident side fillet surface 57 adds
Work.
If the width dimensions of incident side fillet surface 57 (fillet surface) are set into X (mm), as shown in figure 4, width dimensions X
Fillet surface longitudinal direction (hereinafter referred to as longitudinal) on average value XaveFor 0.1mm.XavePreferably 0.1mm~0.5mm.If Xave
For below 0.5mm, then it can increase the width dimensions of incidence surface 53.If XaveFor more than 0.1mm, then it can reduce following X mistake
Difference.
In the width dimensions X of incident side fillet surface 57, processing during because of chamfer machining is actually produced in the vertical not
Error caused by.In Fig. 4, the width dimensions X of incident side fillet surface 57 error is below 0.05mm.So, exist
Average value on the width dimensions X of incident side fillet surface 57 longitudinal direction is Xave(mm) in the case of, the error on X longitudinal direction is excellent
Elect X asave50% within.That is, X is preferably to meet 0.5Xave≤X≤1.5Xave.Error on X longitudinal direction is more preferably Xave
40% within, more preferably Xave30% within, particularly preferably Xave20% within.Thus, entering on longitudinal direction
The error of the width dimensions of light side fillet surface 57 and the width dimensions of incidence surface 53 diminishes, and is produced therefore, it is possible to reduce in light guide plate 5
Raw brightness disproportionation.
In addition, the surface roughness Ra of incident side fillet surface 57 is less than 0.4 μm.It should be noted that for light will be entered
The reasons why surface roughness Ra of side fillet surface 57 is set to less than 0.4 μm, for purposes of illustration only, being described below.Incident side chamfering
The surface roughness Ra in face 57 is preferably less than 0.1 μm, more preferably less than 0.05 μm, further preferably less than 0.03 μm.
In addition, in the present embodiment, as shown in figure 3, between light-emitting face 51 and non-incidence surface 54, light reflection surface 52
Between non-incidence surface 54, between light-emitting face 51 and non-incidence surface 55, between light reflection surface 52 and non-incidence surface 55, light outgoing
Non-light incidence side fillet surface 58 is each formed between face 51 and non-incidence surface 56, between light reflection surface 52 and non-incidence surface 56.However,
Also it can be set to that non-light incidence side fillet surface 58 need not be formed at all above-mentioned positions, and be formed selectively non-light incidence side fillet surface 58
Composition.
If the width dimensions of non-light incidence side fillet surface 58 are set into Y (mm), as shown in figure 4, width dimensions Y longitudinal direction
On average value YaveFor Yave=0.1 (mm)~0.6 (mm).If YaveFor below 0.6mm, then can increase non-incidence surface 54~
56 width dimensions.If YaveFor more than 0.1mm, then it can reduce following Y error.
In the width dimensions Y of non-light incidence side fillet surface 58, processing inequality during because of chamfer machining is produced in the vertical and is led
The error of cause.Average value on Y longitudinal direction is Yave(mm) in the case of, the error on Y longitudinal direction is preferably Yave50%
Within.That is, Y is preferably to meet 0.5Yave≤Y≤1.5Yave.Error on Y longitudinal direction is more preferably Yave40% within, enter
One step is preferably Yave30% within, particularly preferably Yave20% within.Thus, the non-incidence surface 54 that incident light reflects~
The error of width dimensions on 56 longitudinal direction diminishes, therefore, it is possible to reduce the brightness disproportionation produced in light guide plate 5.
In addition, the surface roughness Ra of non-light incidence side fillet surface 58 can be more than the surface roughness of incident side fillet surface 57
Ra.In the case, the surface roughness Ra of incident side fillet surface 57 is preferably more than 0.4 μm.In addition, non-light incidence side fillet surface
58 surface roughness Ra is preferably less than 1.0 μm.
Formed non-light incidence side fillet surface 58 non-incidence surface 54~56 will not the incident light from light source 4, it is therefore not necessary to right
It is processed the high-precision surface of non-incidence surface 54~56.Therefore, the surface roughness Ra setting of non-light incidence side fillet surface 58
Bigger for the situation compared with incident side fillet surface 57, thus, the processing of non-light incidence side fillet surface 58 is compared with incident side fillet surface 57
Become easy, productivity is improved.Further, by making the surface roughness Ra of non-light incidence side fillet surface 58 be more than 0.4 μm and 1.0
Below μm, so that the tackness in the case where reflector plate 6 is sticked together on non-light incidence side fillet surface 58 between the two is good.Need
Bright, if not considering productivity, the surface roughness Ra of non-light incidence side fillet surface 58, which is less than 0.4 μm, just prevents the sight of slight crack
For point preferably.
In addition, the surface roughness Ra of non-incidence surface 54~56 is less than 1.5 μm.The rough surface of non-incidence surface 54~56
It is preferably less than 1.0 μm to spend Ra, more preferably less than 0.8 μm.
In addition, in the present embodiment, not being ground processing to non-incidence surface 54~56.Therefore, non-incidence surface 54~
56 surface roughness Ra is set as, the rough surface of non-incidence surface 54~56 bigger compared with the surface roughness Ra of incidence surface 53
It is preferably more than 0.03 μm to spend Ra, more preferably more than 0.1 μm.Thus, the processing of non-incidence surface 54~56 and the phase of incidence surface 53
Than becoming easy or need not process, productivity is improved.However, also processing can be ground to non-incidence surface 54~56.
Then, the manufacture method to the glass as light guide plate 5 is illustrated.
Fig. 5~Fig. 7 is the figure for illustrating the manufacture method of light guide plate 5.Fig. 5 is the manufacture method for representing light guide plate 5
Block diagram.
When manufacturing light guide plate 5, prepare glass raw material 12 first.The glass raw material 12 effective light path as described above
Length is 5cm~200cm, and thickness is 0.5mm~10mm, the average internal transmitance of the visible-range in effective path length
It is more than 90% for the Y value of the tristimulus values in the XYZ colour systems in more than 80%, and JIS Z8701 (attached book).The glass
Glass raw material 12 have the shape of the set shape more than light guide plate 5.
Implement the cut-out step in Fig. 5 shown in step S10 first to glass raw material 12.In cut-out step, using cutting
Turning device carries out cutting off processing in each position shown in dotted lines in Figure 6 (non-incidence surface side position at incidence surface side position and 3 at 1)
Processing.It should be noted that cutting off processing processing have to not necessarily can also be carried out to non-incidence surface side position at 3, also can be only right
With 1 at incidence surface side position it is opposite 1 at non-incidence surface side position carry out cutting off processing.
By carrying out cutting off processing processing, so that glass baseplate 14 be cut off from glass raw material 12.It should be noted that
In the present embodiment, light guide plate 5 have when overlooking it is rectangular-shaped, therefore, to non-incidence surface at incidence surface side position and 3 at 1
Side position carries out cutting off processing processing.However, off-position is according to the shape of light guide plate 5 suitably selected position.If cut-out
Working process terminates, then implements the 1st chamfering step (step S12).In the 1st chamfering step, using grinding device in light outgoing
Both formation non-light incidence side fillet surfaces 58 between face 51 and non-incidence surface 56 and between light reflection surface 52 and non-incidence surface 56.
It should be noted that between light-emitting face 51 and non-incidence surface 54, between light reflection surface 52 and non-incidence surface 54,
Whole between light-emitting face 51 and non-incidence surface 55 and between light reflection surface 52 and non-incidence surface 55 is formed at any position
In the case of non-light incidence side fillet surface 58, chamfer machining processing is carried out in the 1st chamfering step.
In addition, in the 1st chamfering step, also can between light-emitting face 51 and incidence surface 53 or light reflection surface 52 with
Chamfer machining is carried out between incidence surface 53.In the case, the surface roughness Ra of the fillet surface obtained is more than following 2
The surface roughness Ra of the incident side fillet surface 57 obtained in chamfering step is preferable for productive viewpoint.
In addition, in the present embodiment, grinding processing or grinding are carried out to non-incidence surface 54~56 in the 1st chamfering step
Processing.Carry out the grinding processing for non-incidence surface 54~56 or milled processed can formed above-mentioned non-light incidence side fillet surface 58 it
It is preceding to carry out, it can carry out, can also carry out simultaneously after above-mentioned non-light incidence side fillet surface 58 is formed.It should be noted that for non-
Incidence surface 54,55, also can be directly used as non-incidence surface 54,55 by the face for carrying out cutting off processing processing.
1st chamfering step (step S12) also can be with following mirror finish steps (step S14) and the 2nd chamfering step (step
S16) while or carry out after which, but be preferably carry out before it.Thus, can be in step s 12 with comparatively faster speed
Rate carry out it is corresponding with the shape of light guide plate 5 processing, therefore, productivity raising, and produce in step s 12 it is relatively large
Cullet not easy damaged incidence surface 53 or incident side fillet surface 57.
If the 1st chamfering step (step S12) terminates, next implement mirror finish step (step S14).In the minute surface
In procedure of processing, mirror finish is carried out to the incidence surface side of glass baseplate 14 as shown in Figure 7 and incidence surface 53 is formed.As above institute
State, incidence surface 53 is the face that the light from light source 4 is incided.Thus, incidence surface 53 is using surface roughness Ra as less than 0.03 μm
Mode by mirror finish.
If then implementing the 2nd chamfering in the formation incidence surface 53 of glass baseplate 14 in mirror finish step (step S14)
Step (step S16), thus, to being carried out between light-emitting face 51 and incidence surface 53 and between light reflection surface 52 and incidence surface 53
Grinding processing or milled processed, thus, form incident side fillet surface 57 (fillet surface).It should be noted that step S16 can be in step
Carry out, also can simultaneously be carried out with step S14 before rapid S14.
In the 2nd chamfering step, if the average value on the width dimensions X of incident side fillet surface 57 longitudinal direction is set into Xave,
Then using the error on X longitudinal direction as Xave50% within mode, and by surface roughness Ra in the way of less than 0.4 μm
It is processed.
When forming the incident side fillet surface 57, grinding stone can be used as the instrument for carrying out grinding processing or milled processed,
In addition, in addition to grinding stone, it is possible to use polishing wheel or hairbrush comprising cloth, skin, rubber etc. etc., now, it is possible to use cerium oxide,
The grinding agents such as aluminum oxide, diamond dust, cataloid.
Light guide plate 5 is manufactured by implementing each step shown in above step S10~S16.It should be noted that above-mentioned anti-
Exit point 10A~10C is to be printed on light reflection surface 52 after manufacture light guide plate 5.
However, in each step such as cutting off processing, chamfer machining, mirror finish for implementing in the manufacture of above-mentioned light guide plate 5,
Chips of glass (cullet) is produced from glass raw material 12 and glass baseplate 14.It is precision compared with mirror to cut off step and the 1st chamfering step
Face procedure of processing and the low processing of the 2nd chamfering step, therefore, produced cullet are relatively large, thus, are difficult to be attached to and lead
Tabula rasa 5.
In contrast, mirror finish step and the 2nd chamfering step are the higher processing of precision, and therefore, produced broken glass
Glass is less than the cullet produced in cut-out step and the 1st chamfering step.Therefore, in mirror finish step and the 2nd chamfering step
The cullet of middle generation are easily attached to light guide plate 5.
Further, mirror finish step and the 2nd chamfering step are the processing for incidence surface 53 and incident side fillet surface 57, because
This, the cullet produced in mirror finish step and the 2nd chamfering step are easily attached to incidence surface 53 and incident side fillet surface
57 vicinity.
Diameter L is formed as shown in Figure 2 in the neighbouring position of incidence surface 53 and incident side fillet surface 57ALess pip
10A.That is, the region for forming pip 10A is the wider region of the area that exposes of glass of light guide plate 5.
Further, cullet are chips of glass, therefore, the property with reflected light as described above.
Thus, on the volume reflection from the incident light of light source 4, cullet are attached to the region to form pip 10A
Situation significantly changes (reflection quantitative change is more) compared with the situation that cullet are attached to the region to form pip 10B, 10C.Cause
This, especially in the case where cullet are attached to the region to form pip 10A, the brightness disproportionation produced in light guide plate 5 becomes
Greatly.
In order to suppress to be formed the generation of the brightness disproportionation in pip 10A region, it is necessary to suppress in incidence surface 53 and
The yield of the cullet produced during the processing of incident side fillet surface 57.It is used as the processing of the incident side fillet surface 57 of chamfer machining
The amount of the cullet produced compared with the processing by the incidence surface 53 of mirror finish is more.
Therefore, the present inventor the cullet amount produced in the processing of incident side fillet surface 57 is carried out
The experiment of measure.In addition, in this experiment, in the case where making the machining accuracy change of incident side fillet surface 57, diffusion sheet 7
Surface roughness Ra changes, therefore, to surface roughness Ra and the related pass of the cullet amount produced of incident side fillet surface 57
System is investigated.
The cullet produced in the chamfer machining of incident side fillet surface 57 are to be quantified in the following manner.Fig. 9 is table
The step of quantitative approach of cullet produced by showing, schemes.
The cullet produced during in order to chamfer machining in incident side fillet surface 57 are quantified, and preparing addition has pure water
Beaker, make the incident side fillet surface 57 of the light guide plate 5 after implementation chamfer machining and its be nearby immersed in (step in the pure water
S30)。
By implementing chamfer machining, cullet be attached to incident side fillet surface 57 and its near.Thus, it is attached to incident side
The cullet of the grade of fillet surface 57 also turn into the state being immersed in pure water.
Then, ultrasonic wave cleaning (step is carried out to the incident side fillet surface 57 of light guide plate 5 by making beaker ultrasonic activation
Rapid S32).By carrying out the ultrasonic wave cleaning, it is attached to incident side fillet surface 57 and its neighbouring cullet falls to beaker
Simultaneously accumulate (pure water that also will fall off the cullet is referred to as " cullet water ") bottom.
Then, the cullet water being made in step s 32 was carried out using the filter for having carried out weight measure in advance
Filter (step S34).Thus, cullet are extracted by filter.The filter that extraction there are cullet is dried using drying machine
Handle (step S36).
Then, after filter is fully dried, the weight for carrying out the filter determines (step S38).Then, from step
The weight determined in rapid S38 subtracts the weight of the filter of measured in advance, thus, it is possible to obtain falling in incident side fillet surface 57
The yield (step S40) for the cullet that angle is produced when processing.
Fig. 8 represents the surface roughness Ra and cullet yield (every 1mm of incident side fillet surface 572The cullet of generation
Quality) relation.As shown in Figure 8, it is more than in the surface roughness Ra of incident side fillet surface 57 in the range of 0.3 μm, broken glass
Glass yield is related to surface roughness Ra.
It should be noted that in this experiment, not only incident side fillet surface 57, incidence surface 53 is also immersed in pure water, but
Therefore the influence caused by cullet yield and the dependency relation of surface roughness Ra can be neglected.The reason is that this reality
The surface roughness Ra for applying the incidence surface 53 in mode is less than 0.03 μm, according to Fig. 8, the cullet amount produced in incidence surface 53
It is more small.
On the other hand, the present inventor has been carried out to producing brightness when cullet are attached to incident side fillet surface 57
The calculating of uneven cullet yield.
If a diameter of more than 100 μm of cullet, shadow can be caused to the characteristics of luminescence (brightness disproportionation etc.) of light guide plate 5
Ring.In addition, as described above, the attachment position for the cullet that the optical characteristics to light guide plate 5 is impacted is to form path (LA)
Pip 10A region.The area for forming pip 10A region is substantially the 10% of the entire area of light guide plate 5
Area.
Further, in sheet light emitting apparatus 3, in the case of the brightness disproportionation more than 3% is produced in light guide plate 5, liquid crystal
The display quality of display device 1 can significantly be deteriorated.Thus, the brightness disproportionation produced in the region for forming the pip 10A of path
Preferably less than 3%.
Based on conditions above, the yield of the cullet of the influence to that will not produce brightness disproportionation is calculated.
If the ratio of glass raw material 12 is reset into 2.5 [g/cm3], then the quality W of the cullet of 100 μm of diameter is W=
1.31×10-3[μg]。
If in addition, the size of light guide plate 5 is set into incidence surface L (mm) × non-incidence surface H (mm), by incident side fillet surface 57
Width longitudinal direction on average value be set to Xave(mm), then the area Sa of incident side fillet surface 57 is obtained according to following formula (1).
2 × 2 × L of Sa=√ × Xave[mm2] (1)
Further, forming the pip 10A region (area that can be impacted in the case where cullet adhere to brightness disproportionation
Domain) area for light guide plate 5 entire area substantially 10% area.Form the area S in pip 10A regionb
[mm2] it is to be obtained according to following formula (2).
Sb=0.1 × L × H [mm2] (2)
Herein, if cullet yield is set into c [μ g/mm2], then 100 μm of the diameter produced from incident side fillet surface 57
Cullet generation number be c × Sa/ W [individual].
If assuming, cullet generated as described above are all attached to the region to form pip 10A, in order that brightness is not
Be less than 3%, it is necessary to the ratio that will be attached to the area shown in the cullet in the region to form pip 10A be set to 3% with
Under.That is, it needs to meet following formula (3).
{(c×Sa/W×502×π)/Sb}≤0.03 (3)
Due to being and S according to the width of formula (1) incident side fillet surface 57aIt is directly proportional, thus in order that the face of incidence surface 53
Product is sufficiently large, preferably also meets Sb/Sa≥100.Therefore, in order to meet above-mentioned formula (3) and S all the timeb/Sa>=100, be preferably
Cullet yield c is set to meet following formula (4).
c≤100×0.03×W/(502×π) (4)
The cullet yield c for meeting above-mentioned formula (4) is 0.5 [μ g/mm2] below.
Herein, if reference picture 8, cullet yield is 0.5 [μ g/mm2] the following is the surface of incident side fillet surface 57
Roughness Ra is less than 0.4 μm of situation.Thus demonstrate by the way that the surface roughness Ra of incident side fillet surface 57 is set into 0.4
Below μm, so as to realize the light guide plate 5 that will not produce brightness disproportionation.
It should be noted that the width dimensions X of incident side fillet surface 57 is more big, cullet yield also more increases.Herein
In the case of, in order to which cullet yield is set into 0.5 [μ g/mm2] below, the surface roughness Ra of incident side fillet surface 57 is also excellent
Elect less than 0.3 μm, more preferably more preferably less than 0.1 μm, less than 0.03 μm as.
More than, the preferred embodiment of the present invention is described in detail, but the present invention be not limited to it is above-mentioned specific
Embodiment, in detail in the claims in the range of described purport of the invention, can carry out various modifications, change.
Japanese patent application 2014-219671 of the application to apply on October 28th, 2014 to the Japanese Patent Room
Number and Japanese patent application 2014-231141 conducts from November 14th, 2014 to the Japanese Patent Room that apply require excellent
The basis first weighed, and quote the entire disclosure of which.
Symbol description
1 liquid crystal display device
2 liquid crystal panels
3 sheet light emitting apparatus
4 light sources
5 light guide plates (glass)
6 reflector plates
7 diffusion sheets
8 reflectors
10A~10C pips
12 glass raw materials
14 glass baseplates
51 light-emitting faces (the 1st face)
52 light reflection surfaces (the 2nd face)
53 incidence surfaces (the 1st end face)
54th, 55,56 non-incidence surface (the 2nd end face)
57 incident side fillet surfaces (the 1st fillet surface)
58 non-light incidence side fillet surfaces (the 2nd fillet surface)
Claims (30)
1. a kind of glass light guide plate, it has mutually opposite the 1st face and the 2nd face and is arranged on the 1st face and described the
At least one the 1st end face between 2 faces, wherein,
The glass light guide plate, which has, connects the 1st face or the 2nd face and at least one the 1st chamfering of the 1st end face
Face,
The surface roughness Ra of 1st fillet surface is less than 0.4 μm.
2. glass light guide plate according to claim 1, wherein,
When the average value on the longitudinal direction of the width of the 1st fillet surface is set into XaveWhen,
Error on the width X of 1st fillet surface longitudinal direction is XaveLess than 50%, the XaveUnit be mm.
3. glass light guide plate according to claim 1 or 2, wherein,
There is at least one 2nd end face different with the 1st end face between the 1st face and the 2nd face,
With at least one the 2nd fillet surface for connecting the 1st face or the 2nd face and the 2nd end face,
The surface roughness Ra of 2nd fillet surface is more than the surface roughness Ra of the 1st fillet surface, and for less than 1.5 μm.
4. glass light guide plate according to claim 3, wherein,
When the average value on the longitudinal direction of the width of the 2nd fillet surface is set into YaveWhen,
Error on the width Y of 2nd fillet surface longitudinal direction is YaveLess than 50%, the YaveUnit be mm.
5. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 2nd end face for 1.5 μm with
Under.
6. glass light guide plate according to claim 4, wherein, the surface roughness Ra of the 2nd end face for 1.5 μm with
Under.
7. glass light guide plate according to claim 3, wherein,
1st face to be rectangular-shaped,
With being arranged between the 1st face and the 2nd face and the 2nd end described at least three different with the 1st end face
Face,
With connection the 1st face or the 2nd face and the 2nd fillet surface described at least three of the 2nd end face,
The surface roughness Ra of 2nd fillet surface is all higher than the surface roughness Ra of the 1st fillet surface, and for 1.5 μm with
Under.
8. glass light guide plate according to claim 4, wherein,
1st face to be rectangular-shaped,
With being arranged between the 1st face and the 2nd face and the 2nd end described at least three different with the 1st end face
Face,
With connection the 1st face or the 2nd face and the 2nd fillet surface described at least three of the 2nd end face,
The surface roughness Ra of 2nd fillet surface is all higher than the surface roughness Ra of the 1st fillet surface, and for 1.5 μm with
Under.
9. glass light guide plate according to claim 5, wherein,
1st face to be rectangular-shaped,
With being arranged between the 1st face and the 2nd face and the 2nd end described at least three different with the 1st end face
Face,
With connection the 1st face or the 2nd face and the 2nd fillet surface described at least three of the 2nd end face,
The surface roughness Ra of 2nd fillet surface is all higher than the surface roughness Ra of the 1st fillet surface, and for 1.5 μm with
Under.
10. glass light guide plate according to claim 1 or 2, wherein, the cullet yield in the 1st fillet surface is
0.5μg/mm2Below.
11. glass light guide plate according to claim 1 or 2, wherein, effective path length is 5cm~200cm, effective light
The average internal transmitance of visible-range in Cheng Changdu is more than 80%.
12. glass light guide plate according to claim 1 or 2, wherein, the wavelength under conditions of optical path length 50mm
Average internal transmitance in 400nm~700nm is more than 90%.
13. glass light guide plate according to claim 1 or 2, wherein, the glass light guide plate is used for sheet light emitting apparatus.
14. glass light guide plate according to claim 1 or 2, wherein, effective path length is 5cm~200cm, effective light
The average internal transmitance of visible-range in Cheng Changdu is more than 85%.
15. glass light guide plate according to claim 1 or 2, wherein, effective path length is 5cm~200cm, effective light
The average internal transmitance of visible-range in Cheng Changdu is more than 90%.
16. glass light guide plate according to claim 1 or 2, wherein, the wavelength under conditions of optical path length 50mm
Average internal transmitance in 400nm~700nm is more than 92%.
17. glass light guide plate according to claim 1 or 2, wherein, the wavelength under conditions of optical path length 50mm
Average internal transmitance in 400nm~700nm is more than 93%.
18. glass light guide plate according to claim 1 or 2, wherein, it is formed with pip on the 2nd face.
19. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st end face is less than
0.10μm。
20. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st end face is less than
0.03μm。
21. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st end face is 0.01 μ
Below m.
22. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st end face is 0.005
Below μm.
23. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st fillet surface is 0.1
Below μm.
24. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 1st fillet surface is 0.1 μm
Below.
25. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st fillet surface is
Less than 0.05 μm.
26. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 1st fillet surface is 0.05 μm
Below.
27. glass light guide plate according to claim 1 or 2, wherein, the surface roughness Ra of the 1st fillet surface is less than
0.03μm。
28. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 1st fillet surface is less than 0.03
μm。
29. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 2nd end face for 1.0 μm with
Under.
30. glass light guide plate according to claim 3, wherein, the surface roughness Ra of the 2nd end face for 0.8 μm with
Under.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720810440.2U CN207067439U (en) | 2014-10-28 | 2015-10-15 | Glass light guide plate |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-219671 | 2014-10-28 | ||
| JP2014219671 | 2014-10-28 | ||
| JP2014231141 | 2014-11-14 | ||
| JP2014-231141 | 2014-11-14 | ||
| PCT/JP2015/079180 WO2016067926A1 (en) | 2014-10-28 | 2015-10-15 | Glass and glass manufacturing method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720810440.2U Division CN207067439U (en) | 2014-10-28 | 2015-10-15 | Glass light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206377498U true CN206377498U (en) | 2017-08-04 |
Family
ID=59401921
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720810440.2U Expired - Fee Related CN207067439U (en) | 2014-10-28 | 2015-10-15 | Glass light guide plate |
| CN201590000549.9U Expired - Fee Related CN206377498U (en) | 2014-10-28 | 2015-10-15 | Glass light guide plate |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720810440.2U Expired - Fee Related CN207067439U (en) | 2014-10-28 | 2015-10-15 | Glass light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN207067439U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561776A (en) * | 2017-08-30 | 2018-01-09 | 广东深越光电技术有限公司 | It is a kind of to strengthen backlight module of light efficiency and preparation method thereof |
| CN107561777A (en) * | 2017-08-30 | 2018-01-09 | 广东深越光电技术有限公司 | A kind of backlight module and its manufacturing process for being avoided that brightness unevenness |
| CN107678208A (en) * | 2017-08-30 | 2018-02-09 | 广东深越光电技术有限公司 | A kind of backlight module for the incidence surface product that can increase light guide plate |
| CN107703677A (en) * | 2017-08-30 | 2018-02-16 | 广东深越光电技术有限公司 | A kind of high integrated back light source structure of backlight precision |
| CN107728375A (en) * | 2017-08-30 | 2018-02-23 | 广东深越光电技术有限公司 | A kind of backlight module that can reduce usage quantity needed for LED |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108897091B (en) * | 2018-05-29 | 2021-06-01 | 深圳创维－Rgb电子有限公司 | Compound straight following formula backlight unit |
| TWI662224B (en) * | 2018-12-26 | 2019-06-11 | 聯嘉光電股份有限公司 | Vehicle led linear lighting module |
| JP2020126717A (en) * | 2019-02-01 | 2020-08-20 | 株式会社ジャパンディスプレイ | Illuminating device, display device, and manufacturing method for illuminating device |
| US10578271B1 (en) | 2019-04-17 | 2020-03-03 | Excellence Optoelectronics Inc. | Vehicle LED linear lighting module |
-
2015
- 2015-10-15 CN CN201720810440.2U patent/CN207067439U/en not_active Expired - Fee Related
- 2015-10-15 CN CN201590000549.9U patent/CN206377498U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561776A (en) * | 2017-08-30 | 2018-01-09 | 广东深越光电技术有限公司 | It is a kind of to strengthen backlight module of light efficiency and preparation method thereof |
| CN107561777A (en) * | 2017-08-30 | 2018-01-09 | 广东深越光电技术有限公司 | A kind of backlight module and its manufacturing process for being avoided that brightness unevenness |
| CN107678208A (en) * | 2017-08-30 | 2018-02-09 | 广东深越光电技术有限公司 | A kind of backlight module for the incidence surface product that can increase light guide plate |
| CN107703677A (en) * | 2017-08-30 | 2018-02-16 | 广东深越光电技术有限公司 | A kind of high integrated back light source structure of backlight precision |
| CN107728375A (en) * | 2017-08-30 | 2018-02-23 | 广东深越光电技术有限公司 | A kind of backlight module that can reduce usage quantity needed for LED |
Also Published As
| Publication number | Publication date |
|---|---|
| CN207067439U (en) | 2018-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206377498U (en) | Glass light guide plate | |
| JP7150116B2 (en) | high transmittance glass | |
| JP6296201B2 (en) | Glass light guide plate | |
| JP6288365B1 (en) | Glass light guide plate | |
| EP2600427A1 (en) | Light-emitting module | |
| WO2013031547A1 (en) | Glass plate and glass plate manufacturing method | |
| JP2011079704A (en) | Ceramic material composition | |
| WO2019102787A1 (en) | Wavelength conversion member and light emitting device | |
| CN106573822A (en) | Glass plate | |
| WO2016129559A1 (en) | Glass member and glass | |
| JP2019529316A (en) | High permeability glass containing alkaline earth oxide as modifier | |
| CN206538347U (en) | Glass plate | |
| CN206692565U (en) | Glass light guide plate | |
| JP5516026B2 (en) | Glass ceramic composition, light emitting diode element substrate, and light emitting device | |
| CN206955905U (en) | Glass light guide plate | |
| EP2998768A1 (en) | Optical component | |
| CN110494776A (en) | Wavelength conversion member and light emitting device | |
| CN109642967A (en) | Wavelength conversion member and its manufacturing method | |
| WO2018123896A1 (en) | Glass light guide plate and liquid crystal display device | |
| JP2018145016A (en) | Glass plate | |
| JP2018181619A (en) | Glass light guide plate | |
| JP2014066943A (en) | Optical low-pass filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan Patentee after: ASAHI GLASS Co.,Ltd. Address before: Tokyo, Japan Patentee before: ASAHI GLASS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170804 Termination date: 20211015 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |