CN102171506A - Light guide plate - Google Patents
Light guide plate Download PDFInfo
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- CN102171506A CN102171506A CN2009801391669A CN200980139166A CN102171506A CN 102171506 A CN102171506 A CN 102171506A CN 2009801391669 A CN2009801391669 A CN 2009801391669A CN 200980139166 A CN200980139166 A CN 200980139166A CN 102171506 A CN102171506 A CN 102171506A
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- lgp
- particulate
- light
- refractive index
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Abstract
Disclosed is a light guide plate (3) wherein fine particles are dispersed in a transparent resin. The light guide plate satisfies the following relational expression: Delta n *D50 is not less than 0.30 and not more than 0.70, where Delta n is the absolute value of the difference between the refractive index of the transparent resin and that of the fine particles, and D50 (micrometer) is the 50% volume cumulative diameter of the fine particles. The average light transmissivity of the visible light measured with a light path length of 300 mm is 35% or more.
Description
Technical field
Though the present invention relates to contain the particulate that is useful on light scattering, the LGP that yellow chromaticity has been suppressed fully.
Background technology
Backlight as liquid crystal indicator, lighting device etc., the for example known device that constitutes in such a way: the side that cold-cathode lamp is disposed at LGP, the light from this cold-cathode lamp is reflected in dot pattern by being formed at the LGP back side, prism portion etc., thereby can light be penetrated equably from the LGP front.
As such backlight LGP, the LGP that is known in disperse particles in the transparent resins such as acrylic resin and makes, this LGP can carry out light scattering by containing particulate, brightness uniformity excellence (with reference to TOHKEMY 2001-76522 communique (patent documentation 1)).
Summary of the invention
But, aforesaid disperse particles in transparent resin and the LGP made, transmitted light has yellow sense (the YI value is big) easily slightly, and therefore, there is a little yellow sense of picture strip in the liquid crystal indicator that uses this LGP to constitute and can not get high-grade figure problem like this.That is, existence can not realize colored such problem that shows nature, high-grade.
The present invention finishes in view of above-mentioned technical background, though its purpose is to provide and contains the particulate that is useful on light scattering, but also can penetrate the LGP of the light that yellow chromaticity fully suppressed, and can penetrate the planar light source device of the high light of whiteness, and can realize nature, high-grade colored liquid crystal indicator that shows.
The invention provides following scheme.
1, a kind of LGP, it is characterized in that, this LGP disperse particles and making in transparent resin is made as " Δ n ", accumulation 50% particle diameter of described particulate is made as " D at the absolute value with the difference of the refractive index of the refractive index of described transparent resin and described particulate
50" when (μ m), 0.30≤Δ n * D
50≤ 0.70 relational expression is set up; The average transmittance of the visible light of measuring in the optical path length of 300mm is more than 35%.
2, according to preceding paragraph 1 described LGP, wherein, the accumulation 50% particle diameter (D of described particulate
50) in the scope of 3～7 μ m.
3, according to preceding paragraph 1 or 2 described LGPs, wherein, the absolute value of the difference of the refractive index of described transparent resin and the refractive index of described particulate (Δ n) is 0.08～0.13.
4, according to each described LGP in the preceding paragraph 1～3, wherein, the containing ratio of the described particulate in the LGP is 0.2～20ppm.
5, according to each described LGP in the preceding paragraph 1～4, wherein, described transparent resin is PMMA, and described particulate is the styrenic particulate.
6, a kind of planar light source device is characterized in that, possesses each described LGP in the preceding paragraph 1～5.
7, a kind of liquid crystal indicator is characterized in that, disposes preceding paragraph 6 described planar light source devices in the rear side of liquid crystal panel.
The invention of item 1 is 0.30≤Δ n * D
50The formation that≤0.70 relational expression is set up.The particulate that satisfies this relational expression can make all equal extent ground scatterings of light of any wavelength of visible light, therefore, the yellow sense of the light that penetrates from the light emergence face of LGP is reduced fully, can penetrate the high light of whiteness that does not have yellow sense in fact.In addition, the average transmittance of the visible light of measuring in the optical path length of 300mm is more than 35%, therefore can realize high brightnessization.
In the invention of item 2, the accumulation 50% particle diameter (D of particulate
50) in the scope of 3～7 μ m, therefore, can suppress surface checking, can make the surperficial Paint Gloss of LGP.
In the invention of item 3, the absolute value of the difference of the refractive index of transparent resin and the refractive index of particulate (Δ n) is 0.08～0.13, therefore, if refractive index is in such scope, then the content for the needed particulate of light scattering that obtains expecting gets final product less, because the content of such particulate reduces, and can improve processability.
In the invention of item 4, the containing ratio of the particulate in the LGP is 0.2～20ppm, therefore, obtains and can reduce because the inhomogeneous such effect of particulate that the cohesion of particulate etc. cause.
In the invention of item 5, transparent resin is PMMA, and particulate is the styrenic particulate, and therefore few the and transparent height of the equal light absorption of these PMMA and styrenic, can further improve brightness.
In the invention of item 6, can penetrate the high light of whiteness that does not have yellow sense in fact in high brightness ground.
In the invention of item 7, can penetrate in fact not with the yellow high light of feeling of whiteness from planar light source device on high brightness ground, therefore, it provides a kind of liquid crystal indicator, this liquid crystal indicator can correctly reproduce the color of liquid crystal panel, do not have yellow sense and can realize nature, high-grade bright color shows.
Description of drawings
Fig. 1 is the pattern side view of a kind of embodiment of expression liquid crystal indicator of the present invention.
Fig. 2 is the key diagram of determination method of the average transmittance of the visible light in optical path length 300mm.
Symbol description
1 ... liquid crystal indicator
2 ... light source
3 ... LGP
9 ... planar light source device
30 ... liquid crystal panel
The specific embodiment
A kind of embodiment of liquid crystal indicator of the present invention (1) as shown in Figure 1.This liquid crystal indicator (1) possesses planar light source device (9) and is disposed at the liquid crystal panel (30) of the front face side of this planar light source device (9).
Foregoing liquid crystal panel (30) possesses the enclosing liquid crystal (11) between a pair of transparency electrode (12), (13) up and down of leaving mutually parallel shape ground configuration and the liquid crystal cells (20) that forms and be disposed at this liquid crystal cells (20) polarizer of both sides (14), (15) up and down.By these component parts (11), (12), (13), (14), (15) composing images display part.In addition, the inner face (face of liquid crystal side) in aforementioned transparency electrode (12), (13) is laminated with alignment films (not shown) respectively.
Aforementioned area source (9) is disposed at the following side (rear side) of the polarizer (15) of aforementioned downside.This planar light source device (9) possesses: the fixing light diffusing sheet (4) of mode mounting of overlooking lamp box (5) for the open thin box shape of rectangle and upper face side (front face side), being accommodated in LGP (3) in this lamp box (5) and light source (2) and stopping up according to the evolution face with aforementioned electric lamp box (5).Aforementioned light source (2) is configured in the position, side of aforementioned LGP (3), promptly with the state configuration of a contacts side surfaces of LGP (3).Aforementioned electric lamp box (5) is to make with the acrylic resin of white.Be formed with the point type Printing Department (dot pattern) that utilizes white ink to form at the back side of aforementioned LGP (3) (3a), reflect by utilizing this point type Printing Department to make from the light of aforementioned light source (2) in a side of LGP (3) is incident to LGP (3), thus can make light from the LGP front, be that light emergence face (3b) penetrates equably.
The plate body of the resin combination that aforementioned LGP (3) is made by disperse particles in transparent resin is made.
Aforementioned LGP (3) is to constitute according to the condition that following relational expression is set up.That is, the absolute value of the difference of the refractive index of the refractive index of aforementioned transparent resin and aforementioned particulate is made as " Δ n ", accumulation 50% particle diameter of aforementioned particulate is made as " D
50" when (μ m), 0.30≤Δ n * D
50≤ 0.70 relational expression is set up.That is, utilize the transparent resin and the particulate that satisfy this relational expression to constitute aforementioned LGP (3).
And then the average transmittance of the visible light that aforementioned LGP (3) is measured in the optical path length of 300mm is more than 35%.
The described LGP of above-mentioned formation (3) is 0.30≤Δ n * D
50The formation that≤0.70 relational expression is set up, the particulate that satisfies this relational expression can make all equal extent ground scatterings of light of any wavelength of visible light, therefore, the yellow sense of the light that penetrates from the light emergence face (3b) of LGP (3) reduces fully, can penetrate the high light of whiteness that does not have yellow sense in fact.In addition, the average transmittance of the visible light of measuring in the optical path length of 300mm is more than 35%, therefore, can penetrate high-luminance light.
Thereby, in aforesaid liquid crystal indicator (1), the high light of whiteness that does not have yellow sense in fact penetrates with high brightness towards liquid crystal panel (30) from planar light source device (9), therefore, the color of liquid crystal panel (30) can be correctly reproduced, yellow sense can be do not had and the high-grade bright color demonstration of realization nature.
Wherein, can penetrate the higher light of whiteness aspect, preferably make 0.30≤Δ n * D
50≤ 0.70 relational expression is set up.
As aforementioned LGP (3),, can use LGP arbitrarily if disperse particles and the plate body of the resin combination made then are not particularly limited in transparent resin.
As aforementioned transparent resin, for example can enumerate methacrylic resin (PMMA etc.), polycarbonate resin, ABS resin (acrylonitrile-styrene-butadiene copolymer resin), MS resin (copolymer of methyl methacrylatestyrene resin), polystyrene resin, AS resin (acrylonitritrile-styrene resin resin), vistanex (polyethylene, polypropylene etc.) etc.
As aforesaid particulate, if refractive index is different with the transparent resin that constitutes aforementioned LGP (3) and particulate that transmitted light is spread, then be not particularly limited, can use particulate arbitrarily.For example, can enumerate resin particles such as inorganic particles such as bead, silicon oxide particle, aluminum hydroxide particles, calcium carbonate granule, barium sulfate particle, titan oxide particles, talcum, styrenic particle, acrylic acid series polymeric compounds particle, siloxane-based polymers particle etc.
The accumulation 50% particle diameter (D of aforementioned particulate
50) preferably in the scope of 3～7 μ m.By more than 3 μ m, can make transmitted light scattering fully, and, by below 7 μ m, can make light emergence face (3b) etc. surperficial Paint Gloss of LGP (3).
The absolute value delta n of the difference of the refractive index of aforementioned transparent resin and the refractive index of aforementioned particulate preferably sets 0.08～0.13.If the absolute value delta n of the difference of refractive index is in such scope, then the content for the needed particulate of light scattering that obtains expecting get final product less, and the content reduction by such particulate has the advantage that can improve processability.
The containing ratio of the aforementioned particulate in the aforementioned LGP (3) preferably sets at 0.2～20ppm.By being set in more than the 0.2ppm, can make transmitted light scattering fully, and, by being set in below the 20ppm, can reduce the inhomogeneous of particulate that the cohesion by particulate causes.Wherein, the containing ratio of the particulate in the aforementioned LGP (3) more preferably is set in 0.5～10ppm.
In aforementioned LGP (3), for example can add and make it contain various additives such as ultra-violet absorber, heat stabilizer, antioxidant, weather resisting agent, light stabilizer, fluorescent whitening agent, processing stabilizers.In addition, if in the scope that does not hinder effect of the present invention, then also can add other particulates beyond the particulate that satisfies aforementioned specific relational expression.
Thickness to aforementioned LGP (3) is not particularly limited, and is generally 0.05～15mm, is preferably 0.1～10mm, is more preferably 0.5～5mm.
In the present invention, the average transmittance of the visible light of measuring in the optical path length of 300nm by aforementioned LGP (3) is more than 35%, can realize high brightnessization, wherein, the average transmittance of the visible light that aforementioned LGP (3) is measured in the optical path length of 300mm is preferably more than 50%, particularly preferably in more than 60%.
As the manufacture method of aforementioned LGP (3), can use the forming method of the known method of forming as resin plate, be not particularly limited, for example can enumerate hot pressurization, extrusion by melting, injection mould platen press etc.
In the present invention, aforementioned LGP (3) can be implemented following processing.Promptly, can milled processed week side (51), can implement to be used to make light to become the light DIFFUSION TREATMENT of even light to light emergence face (3b), can implement use the light DIFFUSION TREATMENT of the point type printing of white ink etc., the formation of prism etc. to the back side (3a), the reflection layer of sheet through silver-colored evaporation, film etc. perhaps also can be set at light emergence face (3b) face in addition of LGP.
In above-mentioned embodiment (Fig. 1), adopted 4 sides (structure of the side configuration light source (2) in 51 at LGP (3), but be not defined in this structure especially, for example can adopt in the relative a pair of side of LGP (3) and dispose the structure of light source (2) respectively.
In addition, be not particularly limited, for example can use cold-cathode tube, thermionic-cathode tube, EEFL linear light sources such as (external electrode fluorescent lamps), in addition, can also use light emitting diode point source of lights such as (LED) etc. as aforementioned light source (2).
LGP of the present invention (3), planar light source device (9) and liquid crystal indicator (1) are not defined in above-mentioned embodiment especially, if in the scope of technical scheme of the present invention, only otherwise break away from its basic meaning, allow the change in certain design yet.
Embodiment
Next, describe, but the present invention is not defined in these embodiment especially for specific embodiment of the present invention.
＜embodiment 1 〉
With polystyrene resin particulate (Sekisui Plastics Co., Ltd.'s system " SBX-4 ", refractive index: be that the mode blending of 0.5ppm is in PMMA (polymethyl methacrylate) (Sumitomo Chemical Co's system " SUMIPEX EXN ", refractive index: 1.49) 1.59) according to its containing ratio, after mixing with Henschel mixer, single shaft extruder with screw diameter 40mm carries out melting mixing, extrude from T mouth mould in 265 ℃ of resin temperatures, make the LGP of thick 4mm, wide 20cm thus.In addition, the accumulation 50% particle diameter (D of aforementioned polystyrene resin particle
50) be 3.7 (μ m).
＜embodiment 2 〉
The containing ratio of polystyrene resin particulate is set at 1ppm, in addition, operates similarly to Example 1 and make LGP.
＜embodiment 3 〉
The containing ratio of polystyrene resin particulate is set at 3ppm, in addition, operates similarly to Example 1 and make LGP.
＜embodiment 4 〉
The containing ratio of polystyrene resin particulate is set at 10ppm, in addition, operates similarly to Example 1 and make LGP.
＜embodiment 5 〉
With the polystyrene resin particulate (Sekisui Plastics Co., Ltd.'s system " SBX-6 ", refractive index: 1.59) according to its containing ratio be 0.5ppm the mode blending PMMA (polymethyl methacrylate) (Sumitomo Chemical Co's system " SUMIPEXEXN " ", refractive index: 1.49); after mixing with Henschel mixer; the single shaft extruder with screw diameter 40mm carries out melting mixing; extrude from T mouth mould in 265 ℃ of resin temperatures, make the LGP of thick 4mm, wide 20cm thus.In addition, the accumulation 50% particle diameter (D of aforementioned polystyrene resin particle
50) be 5.8 (μ m).
＜embodiment 6 〉
The containing ratio of polystyrene resin particulate is set at 1ppm, in addition, operates similarly to Example 5 and make LGP.
＜embodiment 7 〉
The containing ratio of polystyrene resin particulate is set at 5ppm, in addition, operates similarly to Example 5 and make LGP.
＜comparative example 1 〉
The containing ratio of polystyrene resin particulate is set at 21ppm, in addition, operates similarly to Example 5 and make LGP.
＜comparative example 2 〉
With polystyrene resin particulate (Sekisui Plastics Co., Ltd.'s system " XX52K ", refractive index: be that the mode blending of 0.5ppm is in PMMA (polymethyl methacrylate) (Sumitomo Chemical Co's system " SUMIPEXEXN ", refractive index: 1.49) 1.59) according to its containing ratio, after mixing with Henschel mixer, single shaft extruder with screw diameter 40mm carries out melting mixing, extrude from T mouth mould in 265 ℃ of resin temperatures, make the LGP of thick 4mm, wide 20cm thus.In addition, the accumulation 50% particle diameter (D of aforementioned polystyrene resin particle
50) be 2.8 (μ m).
＜comparative example 3 〉
The containing ratio of polystyrene resin particulate is set at 1ppm, in addition, similarly operates with comparative example 2 and to make LGP.
＜comparative example 4 〉
The containing ratio of polystyrene resin particulate is set at 3ppm, in addition, similarly operates with comparative example 2 and to make LGP.
＜comparative example 5 〉
The containing ratio of polystyrene resin particulate is set at 10ppm, in addition, similarly operates with comparative example 2 and to make LGP.
＜comparative example 6 〉
With polystyrene resin particulate (Sekisui Plastics Co., Ltd.'s system " SBX-8 ", refractive index: be that the mode blending of 0.5ppm is in PMMA (polymethyl methacrylate) (Sumitomo Chemical Co's system " SUMIPEXEXN ", refractive index: 1.49) 1.59) according to its containing ratio, after mixing with Henschel mixer, single shaft extruder with screw diameter 40mm carries out melting mixing, extrude from T mouth mould in 265 ℃ of resin temperatures, make the LGP of thick 4mm, wide 20cm thus.In addition, the accumulation 50% particle diameter (D of aforementioned polystyrene resin particle
50) be 7.9 (μ m).
＜comparative example 7 〉
The containing ratio of polystyrene resin particulate is set at 10ppm, in addition, similarly operates with comparative example 6 and to make LGP
＜comparative example 8 〉
By with the acrylic resin particulate (Nippon Shokubai Co., Ltd's system " EPOSTARMA1002 ", refractive index: 1.492) according to its containing ratio be 1000ppm the mode blending PMMA (polymethyl methacrylate) (Sumitomo Chemical Co's system " SUMIPEXEXN " ", refractive index: 1.49); after mixing with Henschel mixer; the single shaft extruder with screw diameter 40mm carries out melting mixing; extrude from T mouth mould in 265 ℃ of resin temperatures, make the LGP of thick 4mm, wide 20cm thus.In addition, the accumulation 50% particle diameter (D of aforementioned acrylic resin particulate
50) be 2.0 (μ m).
The assay method of accumulation 50% particle diameter of＜particulate 〉
Particle diameter (the D of the accumulation 50% of particulate
50) be to use Nikkiso Company Limited system Microtrac Particle Size Analyzer (Model 9220FRA), utilize the Fu Laoenhuo Fil diffraction approach of LASER Light Source forward scattering light to measure.When measuring, the microparticulate about 0.1g is obtained dispersion liquid in methyl alcohol, behind 5 minutes ultrasonic waves of this dispersion liquid irradiation, this dispersion liquid is dropped into the sample input port of above-mentioned Microtrac Particle Size Analyzer and measure.In addition, accumulate 50% particle diameter (D
50) be particle diameter and the volume of measuring all particles, begin accumulative total volume in turn from the material of small particle diameter, this accumulative total volume is the particle diameter of 50% particle with respect to the cumulative volume of all particles.
For operating each LGP that obtains in a manner mentioned above, estimate according to following evaluation assessment.Its result is shown in table 1, table 2.
＜the determination method of average transmittance of visible light in optical path length 300mm 〉
As shown in Figure 2, the LGP that obtains is cut to wide 50mm * long 300mm size after, 4 sides (51) are ground with grinder (Korean and Japanese MEGARO corporate system " Pla-Beauty1000 ") make determination test sheet (50).Measure system's (taken into account be equipped with the large-scale sample chamber device of integrating sphere and constitute by U-3410 type spectrophotometric) with Hitachi system plastic properties and measure each wavelength light transmittance separately of this determination experiment sheet in 380～780nm scope with every 5nm in the optical path length of 300mm, the arithmetic mean of instantaneous value of the light transmittance that will obtain according to this operation is as the average transmittance of visible light.
The evaluation assessment of＜YI (yellow colour index, Yellow Index) 〉
As shown in Figure 2, the LGP that obtains is cut to wide 50mm * long 300mm size after, 4 sides (51) are ground with grinder (Korean and Japanese MEGARO corporate system " Pla-Beauty1000 ") make determination test sheet (50).Measure system's (taking into account the large-scale sample chamber device of outfit integrating sphere by U-3410 type spectrophotometric constitutes) with Hitachi's system plastic properties and in the optical path length of 300mm, measure this each wavelength of determination test sheet light transmittance separately with every 5nm in 380～780nm scope, in view of the above, calculate YI (Yellow Index).In addition, be that situation below 2.0 is as qualified with YI.
As shown in Table 1, the YI of the LGP of the embodiment of the invention 1～7 reduces fully, therefore can penetrate the high light of whiteness that does not have yellow sense in fact.In addition, the average transmittance of the visible light of being measured in the optical path length of 300mm is below 35%, therefore, can guarantee sufficient brightness.
Relative therewith, in the LGP of the comparative example 1～8 that breaks away from prescribed limit of the present invention, YI is bigger value.
In addition, from the contrast of embodiment 1,5 and comparative example 2,6 as can be known, (Δ n * D
50) become big, (Δ n * D than 0.30 hour YI
50) YI becomes big, relative therewith when bigger than 0.70, if (Δ n * D
50) scope 0.30～0.70, then YI diminishes fully.
In addition, from the contrast of embodiment 2,6 and comparative example 3 as can be known, (Δ n * D
50) become big, relative therewith than 0.30 hour YI, if (Δ n * D
50) scope 0.30～0.70, then YI diminishes fully.
In addition, from the contrast of embodiment 3 and comparative example 4 as can be known, (Δ n * D
50) become big, relative therewith than 0.30 hour YI, if (Δ n * D
50) scope 0.30～0.70, then YI diminishes fully.
In addition, from the contrast of embodiment 4 and comparative example 5,7 as can be known, (Δ n * D
50) become big, (Δ n * D than 0.30 hour YI
50) YI becomes big, relative therewith when bigger than 0.70, if (Δ n * D
50) scope 0.30～0.70, then YI diminishes fully.
In addition, from the contrast of embodiment 5～7 and comparative example 1 as can be known, if the containing ratio of the particulate in the LGP surpasses 20ppm, then the average transmittance no-load voltage ratio 35% of the visible light of measuring in the optical path length of 300mm is little, and YI also becomes big.
In addition, from the contrast of embodiment 6 and comparative example 8 as can be known, even average transmittance is basic identical, (Δ n * D
50) become big, relative therewith than 0.30 hour YI, if (Δ n * D
50) scope 0.30～0.70, then YI diminishes fully.
The possibility of industrial utilization
LGP of the present invention is suitable for using as the LGP that planar light source device is used, but is not defined in especially this kind purposes. In addition, planar light source device of the present invention is suitable for using as the backlight that the liquid crystal display device is used, but is not defined in especially this kind purposes, uses with, billboard with, illumination device such as the display unit that can be used as other etc.
Claims (7)
1. a LGP is characterized in that, this LGP disperse particles and making in transparent resin,
Be made as " Δ n ", accumulation 50% particle diameter of described particulate is made as " D at absolute value the difference of the refractive index of the refractive index of described transparent resin and described particulate
50" time, 0.30≤Δ n * D
50≤ 0.70 relational expression is set up, and the unit of wherein said accumulation 50% particle diameter is μ m,
The average transmittance of the visible light of measuring in the optical path length of 300mm is more than 35%.
2. LGP according to claim 1, wherein, the accumulation 50% particle diameter D of described particulate
50Scope at 3～7 μ m.
3. according to claim 1 or 2 described LGPs, wherein, the absolute value delta n of the difference of the refractive index of described transparent resin and the refractive index of described particulate is 0.08～0.13.
4. according to each described LGP in the claim 1～3, wherein, the containing ratio of the described particulate in the LGP is 0.2～20ppm.
5. according to each described LGP in the claim 1～4, wherein, described transparent resin is PMMA, and described particulate is the styrenic particulate.
6. a planar light source device is characterized in that, possesses each described LGP in the claim 1～5.
7. a liquid crystal indicator is characterized in that, disposes the described planar light source device of claim 6 in the rear side of liquid crystal panel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-262687 | 2008-10-09 | ||
| JP2008262687A JP4933512B2 (en) | 2008-10-09 | 2008-10-09 | Light guide plate |
| PCT/JP2009/067945 WO2010041768A1 (en) | 2008-10-09 | 2009-10-08 | Light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102171506A true CN102171506A (en) | 2011-08-31 |
| CN102171506B CN102171506B (en) | 2015-03-04 |
Family
ID=42100710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980139166.9A Expired - Fee Related CN102171506B (en) | 2008-10-09 | 2009-10-08 | Light guide plate |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4933512B2 (en) |
| KR (1) | KR20110070999A (en) |
| CN (1) | CN102171506B (en) |
| TW (1) | TWI434080B (en) |
| WO (1) | WO2010041768A1 (en) |
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| CN104991304B (en) * | 2015-06-25 | 2019-02-22 | 东莞轩朗实业有限公司 | Light guide plate, ink and inkjet printing method for manufacturing light guide plate |
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| GB2474748B (en) | 2009-10-01 | 2011-10-12 | Amira Pharmaceuticals Inc | Polycyclic compounds as lysophosphatidic acid receptor antagonists |
| GB2474120B (en) | 2009-10-01 | 2011-12-21 | Amira Pharmaceuticals Inc | Compounds as Lysophosphatidic acid receptor antagonists |
| KR20130112716A (en) * | 2010-06-24 | 2013-10-14 | 도요 스티렌 가부시키가이샤 | Light-guiding plate made of styrenic resin |
| JP5496799B2 (en) * | 2010-07-08 | 2014-05-21 | 株式会社クラレ | Luminous body |
| JP5710295B2 (en) * | 2011-01-31 | 2015-04-30 | 住友化学株式会社 | UV curable inkjet ink for light guide plate and light guide plate using the same |
| WO2012111806A1 (en) * | 2011-02-18 | 2012-08-23 | 住友化学株式会社 | Inspection device and inspection method, and manufacture method using this inspection method |
| TWI424220B (en) * | 2011-03-08 | 2014-01-21 | Tpv Display Technology Xiamen | Display structure |
| JP2012188504A (en) * | 2011-03-09 | 2012-10-04 | Sumitomo Chemical Co Ltd | Resin composition for light guide plate, and light guide plate |
| JP6666065B2 (en) | 2014-09-30 | 2020-03-13 | エルジー ディスプレイ カンパニー リミテッド | Liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128754A (en) * | 2005-02-28 | 2008-02-20 | 株式会社可乐丽 | Photodiffusion film, planar light source element using the same, and liquid crystal display device |
| CN101213256A (en) * | 2005-07-05 | 2008-07-02 | 出光兴产株式会社 | Light-diffusing polycarbonate resin composition and light-diffusing plate using same |
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| JP2004327204A (en) * | 2003-04-24 | 2004-11-18 | Asahi Kasei Chemicals Corp | Optical diffusion layer integrated type light guide plate |
| JP2007048465A (en) * | 2005-08-05 | 2007-02-22 | Mitsubishi Rayon Co Ltd | Led surface light source device |
-
2008
- 2008-10-09 JP JP2008262687A patent/JP4933512B2/en not_active Expired - Fee Related
-
2009
- 2009-10-08 CN CN200980139166.9A patent/CN102171506B/en not_active Expired - Fee Related
- 2009-10-08 TW TW98134137A patent/TWI434080B/en not_active IP Right Cessation
- 2009-10-08 KR KR1020117010433A patent/KR20110070999A/en not_active Application Discontinuation
- 2009-10-08 WO PCT/JP2009/067945 patent/WO2010041768A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128754A (en) * | 2005-02-28 | 2008-02-20 | 株式会社可乐丽 | Photodiffusion film, planar light source element using the same, and liquid crystal display device |
| CN101213256A (en) * | 2005-07-05 | 2008-07-02 | 出光兴产株式会社 | Light-diffusing polycarbonate resin composition and light-diffusing plate using same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991304B (en) * | 2015-06-25 | 2019-02-22 | 东莞轩朗实业有限公司 | Light guide plate, ink and inkjet printing method for manufacturing light guide plate |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201033661A (en) | 2010-09-16 |
| JP2010092755A (en) | 2010-04-22 |
| KR20110070999A (en) | 2011-06-27 |
| CN102171506B (en) | 2015-03-04 |
| JP4933512B2 (en) | 2012-05-16 |
| WO2010041768A1 (en) | 2010-04-15 |
| TWI434080B (en) | 2014-04-11 |
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