CN102472843A - Compound light-control plate, surface light source device, and transparent image display device - Google Patents
Compound light-control plate, surface light source device, and transparent image display device Download PDFInfo
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- CN102472843A CN102472843A CN2010800330980A CN201080033098A CN102472843A CN 102472843 A CN102472843 A CN 102472843A CN 2010800330980 A CN2010800330980 A CN 2010800330980A CN 201080033098 A CN201080033098 A CN 201080033098A CN 102472843 A CN102472843 A CN 102472843A
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- control board
- light
- opital
- opital control
- convex shaped
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
Abstract
Disclosed is a compound light-control plate (1) wherein light entering from a first surface can radiate from a second surface located on the reverse side from said first surface, and which comprises a mutually superimposed first light control plate (10) and second light control plate (20) having a plurality of protrusions (13, 23) that extend in a first direction and that are disposed in parallel in a second direction perpendicular to said first direction formed on the aforementioned second surfaces. The first light control plate and the second light control plate are each light control plates as defined below. The first direction of the second light control plate is perpendicular to the first direction of the aforementioned first light control plate, and the first surface of the second light control plate faces the second surface of the first light control plate. 0.95Z0(X)=Z(X)=1.05Z0(X)...(1), however Z0(x) fulfils formula (2).
Description
Technical field
The present invention relates to complex light control panel, planar light source device and transmission image display device.
Background technology
For example shown in figure 13, as full run-down type image display device 108, widely used is the image display device that disposes light source 107 in the rear side of transmission type image display part 9.As transmission type image display part 9, for example can enumerate the display panels that disposes straight line polaroid 92,92 on the two sides of liquid crystal cells 91.As light source 107, such linear light sources such as cold cathode spool of many straight pipe types are disposed in parallel to each other use.
As described full run-down type image display device 108; Hope to make light from light source 107 to disperse equably and transmission type image display part 9 is thrown light on equably; Therefore; Opital control board 101 of configuration uses between light source 107 and transmission type image display part 9, and said Opital control board 101 has the direction of light that change injects from light source 107 sides and the function (patent documentation 1: japanese kokai publication hei 7-198913 communique) that it is penetrated as display part 9 sides from the transmission-type of opposition side.
In recent years, from saving viewpoint of energy, studying always and using light emitting diode to replace straight pipe type cold cathode spool to be used as light source.Light emitting diode is generally point source of light, it is disposed discretely use.
Patent documentation
Patent documentation 1: japanese kokai publication hei 7-198913 communique
Summary of the invention
But;, polarization structure plate that will be in the past is used for the full run-down type image display device if making up with this point source of light of light emitting diode; Then can't make the light from point source of light form enough light uniformly, exist by transmission type image display part institute images displayed near point source of light with in the different such problems of the position brightness of leaving point source of light.
Therefore, the inventor to disperse equably fully and to the polarization structure plate that the transmission type image display part throws light on equably, has carried out deep research in order to develop can make from the light of point source of light, and the result has accomplished the present invention.
Promptly; The present invention provides a kind of complex light control panel; It is characterized in that; Be the 1st Opital control board and the 2nd Opital control board is overlapped forms, said the 1st Opital control board and the 2nd Opital control board are: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and above-mentioned the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; Above-mentioned the 1st Opital control board and the 2nd Opital control board are respectively following defined Opital control board; The 1st direction quadrature of the 1st direction of above-mentioned the 2nd Opital control board and above-mentioned the 1st Opital control board, and the 1st of above-mentioned the 2nd Opital control board with the 2nd of the 1st Opital control board relatively.
Opital control board: in above-mentioned convex shaped part and section above-mentioned the 1st direction quadrature; The axis at the two ends of above-mentioned the 2nd direction that will be through this convex shaped part is made as the x axle; Will be on above-mentioned x axle through above-mentioned two ends the center and be made as the z axle with the axis of above-mentioned x axle quadrature; When the axial length of the x of above-mentioned convex shaped part was made as wa, the contour shape of above-mentioned convex shaped part was represented by the z that satisfies formula (1) (x) in the scope of-0.475wa≤x≤0.475wa in above-mentioned section.
0.95×Z
0(x)≤z(x)≤1.05×Z
0(x)…(1)
[in the formula (1), Z
0(x) define with formula (2).
(in the formula (2), ha is 0.25wa～0.75wa, and ka is more than-1.0 and less than 0.)〕
According to the present invention, the complex light control panel that can more stably suppress brightness disproportionation can be provided.
Description of drawings
Fig. 1 is an accompanying drawing of schematically representing an example of complex light control panel of the present invention.
Fig. 2 is the accompanying drawing of an example of the section shape of schematically representing the 1st Opital control board and the formed convex shaped part of the 2nd Opital control board.
Fig. 3 is the accompanying drawing of the satisfied condition of the outline line of the section shape of expression convex shaped part.
Fig. 4 is for schematically representing the accompanying drawing of the 2nd embodiment of complex light control panel of the present invention.
Fig. 5 is for schematically representing the accompanying drawing of the 3rd embodiment of complex light control panel of the present invention.
Fig. 6 is for schematically representing the accompanying drawing of the 4th embodiment of complex light control panel of the present invention.
Fig. 7 is for schematically representing the accompanying drawing of the 5th embodiment of complex light control panel of the present invention.
Fig. 8 is for schematically representing the accompanying drawing of the 6th embodiment of complex light control panel of the present invention.
Fig. 9 is for schematically representing the accompanying drawing of the 7th embodiment of complex light control panel of the present invention.
Figure 10 is for schematically representing the accompanying drawing of the 8th embodiment of complex light control panel of the present invention.
Figure 11 is for schematically representing the accompanying drawing of the 9th embodiment of complex light control panel of the present invention.
Figure 12 is for schematically representing to be assembled with the planar light source device of complex light control panel of the present invention and the accompanying drawing of transmission image display device.
Figure 13 is expression planar light source device and the accompanying drawing of transmission image display device in the past schematically.
Embodiment
(complex light control panel)
As shown in Figure 1, the described complex light control panel 1 of embodiment of the present invention is the 1st Opital control board 10 and the 2nd Opital control board 20 overlapped forming.
(the 1st Opital control board)
The 1st Opital control board 10 has the 1st 11 and the 2nd 12.The 2nd 12 for being positioned at the face with the 1st 11 opposition sides.Can penetrate from the 2nd 12 from the 1st 11 light of injecting.
The 1st 11 generally planar of the 1st Opital control board 10.Can be minute surface for the 1st 11, the face of light diffusing also can be arranged for whole mask.
Be formed with convex shaped part 13 at the 2nd 12.This convex shaped part 13 extends at the 1st direction X11.This convex shaped part 13 is formed with a plurality of and disposes side by side at the 2nd direction X12 at the 2nd 12.The 2nd direction X12 is the direction with the 1st direction X11 quadrature.The section shape of a plurality of convex shaped parts 13 that is formed at the 2nd 12 is roughly the same between convex shaped part 13.
Should explain that the thickness d of the 1st Opital control board 10 1 for example is 0.1mm～5mm for since the 1st 11 distance till the top of convex shaped part 13.The 1st Opital control board 10 can also can be sheet for membranaceous.The 1st light diffusing sheet 10 forms the above sheet of thickness 1mm usually.
(the 2nd Opital control board)
The 2nd Opital control board 20 has the 1st 21 and the 2nd 22.The 2nd 22 is the faces that are positioned at the 1st 21 opposition sides.Can penetrate from the 2nd 22 from the 1st 21 light of injecting.
The 1st 21 generally planar of the 2nd Opital control board 20.Can be minute surface for the 1st 21, the face of light diffusing also can be arranged for whole mask.
Be formed with convex shaped part 23 at the 2nd 22.This convex shaped part 23 extends at the 1st direction X21.This convex shaped part 23 is formed with a plurality of and disposes side by side at the 2nd direction X22 at the 2nd 22.The 2nd direction X22 is the direction with the 1st direction X21 quadrature.The section shape of a plurality of convex shaped parts 23 that is formed at the 2nd 22 is roughly the same between convex shaped part 23.
Should explain that the thickness d of the 2nd Opital control board 20 2 for example is 0.1mm～5mm for since the 1st 21 distance till the top of convex shaped part 23.The 2nd Opital control board 20 can also can be sheet for membranaceous.The 2nd Opital control board 20 forms the membranaceous of the not enough 1mm of thickness usually.
(convex shaped part)
Fig. 2 representes to be formed at convex shaped part 13 and the example of the section shape that is formed at the convex shaped part 23 on the 2nd 22 of the 2nd Opital control board 20 on the 2nd 12 of the 1st Opital control board 10.In this Fig. 2, enlarge the shape of a convex shaped part of ground expression.The xz coordinate system that utilizes part shown in Figure 2 describes the shape of this convex shaped part.In this xz coordinate system, the x axle for the direction of arranging with a plurality of convex shaped parts 13,23, promptly the 2nd direction X12, X22 parallel spool.The z axle is parallel with the thickness direction of Opital control board 10,20 axle, itself and the 1st direction x11, X12 and the 2nd direction X12, X22 quadrature.In the xz of this xz coordinate system face, two ends 13a, 13c, 23a, the 23c of the section shape of convex shaped part 13,23 is positioned on the x axle, and top 13b, 23b are positioned on the z axle.
The section shape of convex shaped part 13,23 has the axisymmetric outline line with respect to z.This outline line is represented by the z that satisfies formula (1) (x).
0.95×Z
0(x)≤z(x)1.05×Z
0(x)…(1)
Wherein, in formula (1), Z
0(x) satisfy formula (2).
(in the formula (2), ha is the constant of 0.25wa～0.75wa, and ka is more than-1.0 and less than 0 constant)
Fig. 2 representes that ha is 0.525wa, and ka is-0.400 situation.As stated, wa is the axial length of x of convex shaped part 13,23, and ha is corresponding to making convex shaped part 13,23 form Z
0(x) maximum height between the two ends 13a, 13c, 23a, 23c of the convex shaped part the during shape of expression.
As shown in Figure 3, the outline line of convex shaped part 13,23 can be to obtain Z corresponding to a certain width wa
0(x) time, through 0.95 * Z
0(x) outline line and the 1.05 * Z of expression
0(x) outline line in the zone between the outline line of expression.
From easy formation convex shaped part 13,23; The width wa of convex shaped part 13,23 is generally more than the 40 μ m; Be preferably more than the 250 μ m; With the naked eye be difficult to identification from the decorative pattern that results from convex shaped part 13,23, the width wa of convex shaped part 13,23 is generally below the 800 μ m, is preferably below the 450 μ m.As width wa, particularly, but illustration goes out wa=410 μ m, wa=400 μ m and wa=325 μ m, but the value of wa is not limited to this.
As convex shaped part 13, in following formula (2), ha is preferably 0.4wa～0.7wa, and ka is preferably more than-0.5 and less than 0.
As ha and ka, so preferred
(A) ha is 0.4852wa～0.521wa, and ka is-0.232～-0.227; Or
(B) ha is 0.5966wa～0.6837wa, and ka is-0.075～-0.069; Or
(C) ha is 0.525wa, and ka is-0.4.
The shape of convex shaped part (13,23) as above-mentioned (A) expression; Particularly, for ha and ka, for example can enumerate the shape that ha=0.521wa, ka=-0.229 represent; The shape that ha=0.521wa, ka=-0.227 represent, the shape that ha=0.4825wa, ka=-0.232 represent.
As the shape of convex shaped part (13,23) of above-mentioned (B) expression, particularly, for example can enumerate the shape that ha=0.5966wa, ka=-0.075 represent, the shape that ha=0.6837wa, ka=-0.069 represent.
And then the convex shaped part 13,23 of preferred the 1st Opital control board 10 and the 2nd Opital control board 20 all is the convex shaped part by above-mentioned (B) expression.
Should explain that the convex shaped part 13 of the 1st Opital control board 10 and the convex shaped part 23 of the 2nd Opital control board 20 can identical each other mutually section shapes, also can be different section shapes.
(constituent material of Opital control board)
The 1st Opital control board 10 and the 2nd Opital control board 20 are formed by transparent material.The refractive index of transparent material is 1.46～1.62, and the refractive index that constitutes the transparent material of the 1st Opital control board 10 is generally 1.56～1.62.As transparent material, but illustration goes out transparent resin material, transparent glass material; As transparent resin material; 1.59), MS resin (copolymer of methyl methacrylatestyrene resin) (refractive index: 1.56～1.59), polystyrene resin (refractive index: 1.59) etc. but illustration goes out polycarbonate resin (refractive index:; See from cost aspect and the low aspect of hydroscopicity, be preferably polystyrene resin.
When using transparent resin material, can also in this transparent resin material, add adjuvants such as ultraviolet light absorber, antistatic agent, anti-oxidant, processing stabilizers, fire retardant, lubricant as transparent material.These adjuvants can be distinguished independent use, perhaps make up more than 2 kinds and use.
As ultraviolet light absorber; For example can enumerate benzotriazole and be ultraviolet light absorber, benzophenone series ultraviolet light absorber, cyanoacrylate is that ultraviolet light absorber, malonate are that ultraviolet light absorber, oxanilide are that ultraviolet light absorber, triazine are ultraviolet light absorber etc., and being preferably benzotriazole is that ultraviolet light absorber, triazine are ultraviolet light absorber.
As long as transparent resin material is normally used to be not add the material that light diffusing agent is used as adjuvant, but for not damaging the slight amount of the object of the invention, just can add light diffusing agent and uses.
Employed light diffusing agent during as interpolation light diffusing agent in transparent material, normally used is refractive index and the refractive index different powder that constitutes the transparent material of Opital control board 10,20, it is dispersed in the transparent material uses.As this light diffusing agent, for example can use organic fillers such as styrene resin particle, methacrylic resin particle, inorganic particulates such as calcium carbonate particle, silicon dioxide granule, its particle diameter are generally 0.8 μ m～50 μ m.
(layer of Opital control board constitutes)
The lamina that transparent material that the 1st Opital control board 10 and the 2nd Opital control board 20 can be served as reasons independent constitutes, the multilayer board of the structure that also can get for the range upon range of layer that constitutes by mutual transparent materials with different.When Opital control board 10,20 is multilayer board; Single face or the two sides of Opital control board 10,20 are become be formed with the structure of epidermal area that is generally 10 μ m～200 μ m, is preferably the thickness of 20 μ m～100 μ m; As the transparent material that constitutes this epidermal area, preferably use the material that in transparent resin material, has added ultraviolet light absorber and got.Through forming said formation; Thereby can prevent especially when using fluorescent tube, can prevent the deterioration that causes because of ultraviolet ray from fluorescent tube as light source because of light source, from the deterioration of certain contained ultraviolet light diffusing sheet 10,20 that causes of the light of outside; Therefore; Preferably on the 1st 11,21, be formed with epidermal area, at this moment, further preferably on the 2nd 12,22, do not forming epidermal area aspect the cost.Use in transparent resin material, add ultraviolet light absorber and transparent resin material when constituting the transparent material of epidermal area; With the transparent resin material is benchmark; The content of ultraviolet light absorber is generally 0.5 quality %～5 quality %, is preferably 1 quality %～2.5 quality %.
Can make the 1st 21 of the 1st the 11 and the 2nd Opital control board 20 of the 1st Opital control board 10 become face with light diffusing.In order to make the 1st 11,21 to become face, for example can utilize the epidermal area that contains the minuteness particle that is known as matting agent to constitute the 1st 11,21 with light diffusing; Can implement embossing processing, injection processing to the 1st 11,21; Can coat the 1st 11,21 and give light diffusing through mixing coating fluid that matting agent and bonding agent get.
The 1st Opital control board 10 and the 2nd Opital control board 20 can have antistatic agent at single face or two sided coatings.Through the coating antistatic agent, the adhering to etc. of the dust that can prevent to cause, thereby the reduction of the light transmittance that can prevent to cause because of adhering to of dust because of static.
(manufacturing of Opital control board)
The 1st Opital control board 10 and the 2nd Opital control board 20 for example can be made through the method that is cut out by transparent material.In addition, when using transparent resin material, for example can make through the method for routines such as injection molding method, extrusion moulding, shaping method to suppress, light polymerization method as transparent material.
(complex light control panel)
Complex light control panel 1 of the present invention is described the 1st Opital control board 10 and the 2nd Opital control board 20 overlapped forming, and is of Fig. 1, the 1st direction X11 quadrature of the 1st direction X21 of the 2nd Opital control board 20 and the 1st Opital control board 10.
In addition, as shown in Figure 1, the 2nd 12 of the 1st the 21 and the 1st Opital control board 10 of the 2nd Opital control board 20 is relative.
The 1st Opital control board 10 and the 2nd Opital control board 20 that constitute complex light control panel 1 of the present invention are situated between overlapping by air layer usually; This be spaced apart from the top 13b that is formed at the convex shaped part 13 on the 2nd 12 of the 1st Opital control board 10 begin till the 1st 21 to the 2nd Opital control board 20 apart from d12; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely; This is 0mm apart from d12, and the top 13b that is formed at the convex shaped part 13 on the 1st Opital control board 10 can join with the 1st 21 of the 2nd Opital control board 20.
The 1st light diffusing sheet 10 and the 2nd light diffusing sheet 20 can not interfix and only carry out overlapping, but from preventing to move the top 13b of the convex shaped part 13 cause, the 1st 21 damage aspect each other because of the position, for example portion is bonding each other on the edge of.
The shape of complex light control panel 1 is generally rectangle, and its size can be selected according to the mode of the picture dimension that is suitable for object penetrating type image display device 9, is generally more than 250mm * 440mm, is preferably below 1020mm * 1800mm.
(the 1st embodiment) (Fig. 1)
As shown in Figure 1, the described complex light diffuser plate 1 of the 1st embodiment of the present invention can only be made up of above-mentioned the 1st light diffusing sheet 10 and the 2nd light diffusing sheet 20.
(the 2nd embodiment) (Fig. 4)
As shown in Figure 4, the described complex light diffuser plate 1 of the 2nd embodiment of the present invention can be at the further overlapping isotropy light diffusing sheet 30 of the 2nd 22 sides of the 2nd light diffusing sheet 20.
(isotropy light diffusing sheet)
Isotropy light diffusing sheet (the 1st isotropy light diffusing sheet) 30 has the 1st 31 and the 2nd 32.The 2nd 32 for being positioned at the face with the 1st 31 opposition sides.Can penetrate from the 2nd 32 from the 1st 31 light of injecting.
The 1st 31 and the 2nd 32 generally planar of isotropy light diffusing sheet 30.
Isotropy light diffusing sheet 30 be can make from the 1st 31 light of injecting in scattering isotropically from the 2nd 32 optical element that penetrates; For example can enumerate dispersed light diffusant in transparent material and optical element, at the surface coated light diffusing agent of the base material that forms by transparent material and optical element, the substrate surface that forms by transparent material form fine round lens and must optical element; Can also can be sheet for membranaceous.
As transparent material, can use and the identical transparent material of in the 1st light diffusing sheet 10 and the 2nd light diffusing sheet 20, being enumerated of material.
As light diffusing agent, use and constitute the refractive index different powder of the transparent material of isotropy light diffusing sheet 30 usually, can it be dispersed in transparent material and use.As described light diffusing agent, for example can use organic fillers such as styrene resin particle, methacrylic resin particle, inorganic particulates such as calcium carbonate particle, silicon dioxide granule, its particle diameter are generally 0.8 μ m～50 μ m.
Through being dispersed in light diffusing agent the isotropy light diffusing sheet 30 isotropically in the scattering, see through isotropy light diffusing sheet 30 from the 1st 31 light of injecting of isotropy light diffusing sheet 30, penetrate from the 2nd 32.
The thickness d 3 of isotropy light diffusing sheet 30 is generally 0.1mm～5mm for the distance till the 1st 31 to the 2nd 32, can also can be sheet for membranaceous.
Described isotropy light diffusing sheet 30 and the 2nd Opital control board 20 are situated between overlapping by air layer usually; It is spaced apart from the top 23b that is formed at the convex shaped part 23 on the 2nd 22 of the 2nd Opital control board 20 begin till the 1st 31 to isotropy light diffusing sheet 30 apart from d23; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely; This is 0mm apart from d23, and the top 23b that is formed at the convex shaped part 23 of the 2nd Opital control board 20 can join with the 1st 31 of isotropy light diffusing sheet 30.
(the 3rd embodiment) (Fig. 5)
The 2nd isotropy light diffusing sheet 30B is the light diffusing sheet identical with the 1st isotropy light diffusing sheet 30, has the 1st 31 and the 2nd 32.The 2nd 32 for being positioned at the face with the 1st 31 opposition sides.Can penetrate from the 2nd 32 from the 1st 31 light of injecting.
The 2nd isotropy light diffusing sheet 30B is the light diffusing sheet identical with the 1st isotropy light diffusing sheet 30, has the 1st 31 and the 2nd 32.The 2nd 32 for being positioned at the face with the 1st 31 opposition sides.Can penetrate from the 2nd 32 from the 1st 31 light of injecting.
The 2nd isotropy light diffusing sheet 30B and the 1st isotropy light diffusing sheet 30 are situated between overlapping by air layer usually; It is spaced apart till the 1st 31 since the 2nd 32 to the 2nd isotropy light diffusing sheet 30B of the 1st isotropy light diffusing sheet 30 apart from d33; Be generally below the 5mm; From make complex light control panel 1 closely viewpoint see that this is 0mm apart from d33, the 2nd 32 of above-mentioned the 1st isotropy light diffusing sheet 30 can join with the 1st 31 of the 2nd isotropy light diffusing sheet 30B.
(the 4th embodiment) (Fig. 6)
As shown in Figure 6, the described complex light control panel 1 of the 4th embodiment of the present invention can be at further overlapping the 3rd Opital control board 40 of the 2nd 32 sides of the 1st isotropy light diffusing sheet 30 that constitutes the complex light control panel 1 shown in the 2nd embodiment (Fig. 4).
The 3rd Opital control board 40 has the 1st 41 and the 2nd 42.The 2nd 42 for being positioned at the face with the 1st 41 opposition sides.Can penetrate from the 2nd 42 from the 1st 41 light of injecting.
The 1st 41 generally planar of the 3rd Opital control board 40.
Be formed with convex shaped part 43 at the 2nd 42.This convex shaped part 43 extends on the 1st direction X41.This convex shaped part 43 is formed with a plurality of at the 2nd 42, and configuration side by side on the 2nd direction X42.The 2nd direction X42 is the direction with the 1st direction X41 quadrature.The section shape that is formed at a plurality of convex shaped parts 43 on the 2nd 42 is roughly the same between convex shaped part (43).
Should explain that the thickness d of the 3rd Opital control board 40 4 is generally 0.1mm～5mm for since the 1st 41 distance till the summit of convex shaped part 43, can also can be sheet for membranaceous.
The 1st direction X11 quadrature of the 1st direction X41 of the 3rd Opital control board 40 and the 1st Opital control board 10.
In addition, the 1st of the 3rd Opital control board 40 the 41 with above-mentioned the 1st isotropy light diffusing sheet 30 the 2nd 32 is relative.
The section shape that is formed at the convex shaped part 43 on the 2nd 42 of the 3rd Opital control board 40 for example can be isosceles triangle, as the convex shaped part 13,23 of the 1st Opital control board 10 and the 2nd Opital control board 20, can be shape same as described above.
The 3rd Opital control board 40 is situated between usually and is overlapped in the 2nd 32 sides of the 1st isotropy light diffusing sheet 30 by air layer; It is spaced apart till the 1st 41 from the 2nd 32 to the 3rd Opital control board 40 of the 1st isotropy light diffusing sheet 30 apart from d34; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d34, and the 2nd 32 of above-mentioned the 1st isotropy light diffusing sheet 30 can join with the 1st 41 of the 3rd Opital control board 40.
(the 5th embodiment) (Fig. 7)
As shown in Figure 7, the described complex light control panel 1 of the 5th embodiment of the present invention can be at further overlapping the 3rd Opital control board 40 of the 2nd 22 sides of the 2nd light diffusing sheet 20.The 3rd Opital control board 40 in this embodiment is with identical at the 3rd Opital control board 40 described in the 4th embodiment
The 1st direction X41 of the 3rd Opital control board 40 is parallel with the 1st direction X11 of the 1st Opital control board 10.
In addition, the 2nd 22 of the 1st of the 3rd Opital control board 40 the 41 and the 2nd light diffusing sheet 20 relative.
The 3rd Opital control board 40 is situated between usually and is overlapped in the 2nd 22 sides of the 2nd light diffusing sheet 20 by air layer; It is spaced apart till the 1st 41 since the 2nd 22 side to the 3 Opital control boards 40 of the 2nd light diffusing sheet 20 apart from d24; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d24, and the 2nd 22 of above-mentioned the 2nd light diffusing sheet 20 can join with the 1st 41 of the 3rd Opital control board 40.
(the 6th embodiment) (Fig. 8)
As shown in Figure 8, the described complex light control panel 1 of the 6th embodiment of the present invention can be at the further overlapping isotropy light diffusing sheet 30 of the 2nd 42 sides of the 3rd Opital control board 40 that constitutes the complex light diffuser plate 1 shown in the 5th embodiment (Fig. 7).
This isotropy light diffusing sheet 30 is light diffusing sheets identical with the isotropy light diffusing sheet that constitutes the complex light control panel 1 shown in the 2nd embodiment 30.
The 3rd Opital control board 40 is situated between overlapping by air layer with isotropy light diffusing sheet 30 usually; It is spaced apart till the 1st 31 since the 2nd 42 of the 3rd Opital control board 40 to isotropy light diffusing sheet 30 apart from d43; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d43, and the 2nd 42 of the 3rd Opital control board 40 can join with the 1st 31 of isotropy light diffusing sheet 30.
(the 7th embodiment) (Fig. 9)
As shown in Figure 9, the described complex light control panel 1 of the 7th embodiment of the present invention can be at further overlapping the 4th Opital control board 50 of the 2nd 42 sides of the 3rd Opital control board 40 that constitutes the complex light diffuser plate 1 shown in the 5th embodiment (Fig. 7).The 4th Opital control board 50 in this embodiment is identical with the 3rd Opital control board 40 described in the 4th embodiment.
The 1st direction X11 quadrature of the 1st direction X51 of the 4th Opital control board 50 and the 1st Opital control board 10.
In addition, the 2nd 42 of the 1st of the 4th Opital control board 50 the 51 and the 3rd Opital control board 40 relative.
The 4th Opital control board 50 is situated between usually and is overlapped in the 2nd 42 sides of the 3rd Opital control board 40 by air layer; It is spaced apart till the 1st 51 since the 2nd 42 side to the 4 Opital control boards 50 of the 3rd Opital control board 40 apart from d45; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d45, and the 2nd 42 of above-mentioned the 3rd light diffusing sheet 40 can join with the 1st 51 of the 4th Opital control board 50.
(the 8th embodiment) (Figure 10)
Shown in figure 10, the described complex light control panel 1 of the 8th embodiment of the present invention can be at further overlapping the 4th Opital control board 50 of the 2nd 42 sides that constitutes like the 3rd Opital control board 40 of the described complex light diffuser plate 1 of the 5th embodiment (Fig. 7).The 4th Opital control board 50 in this embodiment is identical with the 3rd Opital control board 30 described in the 4th embodiment.
The 1st direction X51 of the 4th Opital control board 50 is parallel with the 1st direction X11 of the 1st Opital control board 10.
In addition, the 2nd 42 of the 1st of the 4th Opital control board 50 the 51 and the 3rd Opital control board 40 relative.
The 4th Opital control board 50 is situated between usually and is overlapped in the 2nd 42 sides of the 3rd Opital control board 40 by air layer; It is spaced apart till the 1st 51 since the 2nd 42 side to the 4 Opital control boards 50 of the 3rd Opital control board 40 apart from d45; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d45, and the 2nd 42 of above-mentioned the 3rd light diffusing sheet 40 can join with the 1st 51 of the 4th Opital control board 50.
(the 9th embodiment) (Figure 11)
Shown in figure 11, the described complex light control panel 1 of the 9th embodiment of the present invention can be at further overlapping the 3rd Opital control board 40 of the 2nd 22 sides of the 2nd light diffusing sheet 2.The 3rd Opital control board 40 in this embodiment is with identical at the 3rd Opital control board 40 described in the 4th embodiment.
The 1st direction X11 quadrature of the 1st direction X41 of the 3rd Opital control board 40 and the 1st Opital control board 10.
In addition, the 2nd 22 of the 1st of the 3rd Opital control board 40 the 41 and the 2nd light diffusing sheet 20 relative.
The 3rd Opital control board 40 is situated between usually and is overlapped in the 2nd 22 sides of the 2nd light diffusing sheet 20 by air layer; It is spaced apart till the 1st 41 since the 2nd 22 side to the 3 Opital control boards 40 of the 2nd light diffusing sheet 20 apart from d24; Be generally below the 5mm; From making complex light control panel 1 viewpoint closely, this is 0mm apart from d24, and the 2nd 22 of above-mentioned the 2nd light diffusing sheet 20 can join with the 1st 41 of the 3rd Opital control board 40.
(planar light source device)
Shown in figure 12, preferably the described complex light control panel 1 of embodiment of the present invention is assembled in the planar light source device 6 and uses.This planar light source device 6 possesses the described complex light control panel 1 of embodiment of the present invention and a plurality of light sources 7.
A plurality of light sources 7 dispose spaced reciprocally.7 pairs of these light sources constitute the 1st 11 supply light of the 1st Opital control board 10 of complex light control panel 1.
(light source)
As light source 7, for example can enumerate linear light sources such as cold cathode spool, but be preferably LED point source of lights such as (light emitting diodes).
Interval L between a plurality of light sources 7 is the distance between light source center, is generally 10mm～150mm.The distance B that begins till the 1st 11 to the 1st Opital control board 10 from light source 7 centers is generally 3mm～50mm, can make planar light source device 6 attenuation aspect on, preferably their ratio (L/D) is more than 2, and then is preferably more than 2.5.
(transmission image display device)
Shown in figure 12, preferably this planar light source device 6 is assembled in the transmission image display device 8 and uses.This transmission image display device 8 possesses above-mentioned planar light source device 7 and transmission type image display part 9.As transmission type image display part 9, but for example illustration goes out the transmission-type liquid crystal display part that is made up of liquid crystal cells 91 and the straight line polaroid 92 that is disposed at its two sides.In this transmission image display device 8, transmission type image display part 9 is by the display image through the optical illumination of complex light control panel 1.The light of only exporting through complex light control panel 1 from a plurality of light sources 6 that constitute planar light source device 7.
(configuration of complex light control panel)
In transmission image display device 8, the 1st direction X11 that complex light control panel 1 can be configured to the 1st Opital control board 10 becomes the transverse direction of picture, and the 1st direction X11 that also can be configured to the 1st Opital control board 10 becomes the longitudinal direction of picture.
(the 1st direction of the 1st Opital control board becomes the situation of transverse direction)
The mode that becomes the transverse direction of picture as if the 1st direction X11 according to the 1st Opital control board 10 disposes the described complex light control panel 1 of embodiment of the present invention; Then the 2nd direction X12 of the 1st Opital control board 10 becomes longitudinal direction; The 2nd direction X22 of the 2nd Opital control board 20 becomes transverse direction; At this moment; In order further to suppress the brightness disproportionation when the inclination transverse direction is watched; Ha in the formula (2) of the contour shape of the convex shaped part 23 of preferred expression the 2nd Opital control board 20 and the ratio (R2=ha/wa) of wa be less than the ratio (R1=ha/wa) of the ha in the formula (2) of the contour shape of the convex shaped part 13 of expression the 1st Opital control board 10 with wa, in addition, representes that preferably ka in the formula (2) of contour shape of convex shaped part 23 of the 2nd Opital control board 20 is less than the ka in the formula (2) of the contour shape of the convex shaped part 13 of expression the 1st Opital control board 10.And then in the configuration of preferred light source 7 in transmission image display device 8, the light source of the longitudinal direction of picture (LV) at interval equates that with the light source interval (LH) of transverse direction perhaps the light source of the longitudinal direction of picture interval (LV) is greater than the light source interval (LH) of transverse direction.
(the 1st direction of the 1st Opital control board becomes the situation of longitudinal direction)
The mode that becomes the longitudinal direction of picture as if the 1st direction X11 according to the 1st Opital control board 1 disposes the complex light control panel 1 in the embodiment of the present invention; Then the 2nd direction X12 of the 1st Opital control board 10 becomes transverse direction; The 2nd direction X22 of the 2nd Opital control board 20 becomes longitudinal direction; At this moment; In order further to suppress the brightness disproportionation when the inclination transverse direction is watched; Ha in the formula (2) of the contour shape of the convex shaped part 13 of preferred expression the 1st Opital control board 20 and the ratio (R1=ha/wa) of wa be less than the ratio (R2=ha/wa) of the ha in the formula (2) of the contour shape of the convex shaped part 23 of expression the 2nd Opital control board 20 with wa, in addition, representes that preferably ka in the formula (2) of contour shape of convex shaped part 13 of the 1st Opital control board 10 is less than the ka in the formula (2) of the contour shape of the convex shaped part 23 of expression the 2nd Opital control board 20.And then in the configuration of preferred light source 7 in transmission image display device 9, the light source of the longitudinal direction of picture (LV) at interval equates that with the light source interval (LH) of transverse direction perhaps the light source of the longitudinal direction of picture interval (LV) is greater than the light source interval (LH) of transverse direction.
Utilizability in the industry
Utilize complex light control panel of the present invention, planar light source device and transmission image display device can more stably suppress brightness disproportionation.
Symbol description
1, complex light control panel; 10, the 1st Opital control board; 11, the 1st; 12, the 2nd; 13, convex shaped part; The two ends of 13a, 13c, convex shaped part; The summit of 13b, convex shaped part; X11, the 1st direction; X12, the 2nd direction; 20, the 2nd Opital control board; 21, the 1st; 22, the 2nd; 23, convex shaped part; The two ends of 23a, 23c, convex shaped part; The summit of 23b, convex shaped part; X21, the 1st direction; X22, the 2nd direction; 30,30B, isotropy light diffusing sheet; 31, the 1st; 32, the 2nd; 40, the 3rd Opital control board; 41, the 1st; 42, the 2nd; 43, convex shaped part; The two ends of 43a, 43c, convex shaped part; The summit of 43b, convex shaped part; X41, the 1st direction; X42, the 2nd direction; 50, the 4th Opital control board; 51, the 1st; 52, the 2nd; 53, convex shaped part; The two ends of 53a, 53c, convex shaped part; The summit of 53b, convex shaped part; X51, the 1st direction; X52, the 2nd direction; 6, planar light source device; 7, light source; 8, transmission image display device; 9, transmission type image display part; 91, liquid crystal cells; 92, straight line polaroid; 101, in the past Opital control board; 106, planar light source device; 107, light source; 108, transmission image display device.
Claims (14)
1. complex light control panel; It is characterized in that; It is the 1st Opital control board and the 2nd Opital control board is overlapped forms; Said the 1st Opital control board and the 2nd Opital control board are: the light of injecting from the 1st face can be from being positioned at the 2nd ejaculation with the 1st opposition side, and said the 2nd face be formed with extending on the 1st direction and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side
Said the 1st Opital control board and the 2nd Opital control board are respectively following defined Opital control board; The 1st direction quadrature of the 1st direction of said the 2nd Opital control board and said the 1st Opital control board, and the 1st of said the 2nd Opital control board with the 2nd of the 1st Opital control board relatively;
Opital control board: in said convex shaped part and section said the 1st direction quadrature; The axis at the two ends of said the 2nd direction that will be through this convex shaped part is made as the x axle; Will be on said x axle through said two ends the center and be made as the z axle with the axis of said x axle quadrature; When the axial length of the x of said convex shaped part is made as wa, in the contour shape of convex shaped part described in the said section scope, represent by the z that satisfies formula (1) (x) at-0.475wa≤x≤0.475wa
0.95×Z
0(x)≤z(x)≤1.05×Z
0(x)…(1)
In the formula (1), Z
0(x) define with formula (2),
In the formula (2), ha is 0.25wa～0.75wa, and ka is more than-1.0 and less than 0.
2. complex light control panel according to claim 1, wherein, the ha in the said formula (2) is 0.4wa～0.7wa.
3. complex light control panel according to claim 2, wherein, the ka in the said formula (2) is more than-0.5.
4. according to each described complex light control panel in the claim 1～3, wherein, the ha in the said formula (2) is 0.4852wa～0.521wa, and ka is-0.232～-0.227; Perhaps ha is 0.5966wa～0.6837wa, and ka is-0.075～-0.069; Perhaps ha is 0.525wa, and ka is-0.4.
5. according to each described complex light control panel in the claim 1～4, wherein, there is the light injected from the 1st face can be in that the 2nd side of said the 2nd Opital control board is further overlapping from being positioned at the isotropy light diffusing sheet with the 2nd ejaculation of the 1st opposition side.
6. complex light control panel according to claim 5 wherein, has the light injected from the 1st face can be from being positioned at the isotropy light diffusing sheet with the 2nd ejaculation of the 1st opposition side in that the 2nd side of said isotropy light diffusing sheet is further overlapping.
7. complex light control panel according to claim 5; Wherein, The 3rd Opital control board arranged in that the 2nd side of said isotropy light diffusing sheet is further overlapping, said the 3rd Opital control board is: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and said the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; The 1st direction quadrature of the 1st direction of the 3rd Opital control board and the 1st Opital control board, and the 1st of the 3rd Opital control board with the 2nd of said isotropy light diffusing sheet relatively.
8. according to each described complex light control panel in the claim 1～4; Wherein, The 3rd Opital control board arranged in that the 2nd side of said the 2nd Opital control board is further overlapping, said the 3rd Opital control board is: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and said the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; The 1st direction of the 3rd Opital control board is parallel with the 1st direction of the 1st Opital control board, and the 1st of the 3rd Opital control board with the 2nd of said the 2nd Opital control board relatively.
9. complex light control panel according to claim 8 wherein, has the light injected from the 1st face can be from being positioned at the isotropy light diffusing sheet with the 2nd ejaculation of the 1st opposition side in that the 2nd side of said the 3rd Opital control board is further overlapping.
10. complex light control panel according to claim 8; Wherein, The 4th Opital control board arranged in that the 2nd side of said the 3rd Opital control board is further overlapping, said the 4th Opital control board is: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and said the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; The 1st direction quadrature of the 1st direction of the 4th Opital control board and the 1st Opital control board, and the 1st of the 4th Opital control board with the 2nd of said the 3rd Opital control board relatively.
11. complex light control panel according to claim 8; Wherein, The 4th Opital control board arranged in that the 2nd side of said the 3rd Opital control board is further overlapping, said the 4th Opital control board is: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and said the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; The 1st direction of the 4th Opital control board is parallel with the 1st direction of the 1st Opital control board, and the 1st of the 4th Opital control board with the 2nd of said the 3rd Opital control board relatively.
12. according to each described complex light control panel in the claim 1～4; Wherein, The 3rd Opital control board arranged in that the 2nd side of said the 2nd Opital control board is further overlapping, said the 3rd Opital control board is: the light of injecting from the 1st face can from be positioned at that with the 1st opposition side the 2nd penetrates and said the 2nd face be formed with the 1st direction extend and with the 2nd direction of the 1st direction quadrature on a plurality of convex shaped parts of configuration side by side; The 1st direction quadrature of the 1st direction of the 3rd Opital control board and the 1st Opital control board, and the 1st of the 3rd Opital control board with the 2nd of said the 2nd Opital control board relatively.
13. a planar light source device is characterized in that, possesses each described complex light control panel in the claim 1～12 and apart from one another by the ground configuration and to the 1st a plurality of light sources of supplying with light of the 1st Opital control board that constitutes said complex light control panel.
14. a transmission image display device is characterized in that, possesses the described planar light source device of claim 13 and by throwing light on and the transmission type image display part of display image from said a plurality of light sources output and the light through said complex light control panel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009175075 | 2009-07-28 | ||
| JP2009-175075 | 2009-07-28 | ||
| PCT/JP2010/062636 WO2011013671A1 (en) | 2009-07-28 | 2010-07-27 | Compound light-control plate, surface light source device, and transparent image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102472843A true CN102472843A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800330980A Pending CN102472843A (en) | 2009-07-28 | 2010-07-27 | Compound light-control plate, surface light source device, and transparent image display device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2011048355A (en) |
| CN (1) | CN102472843A (en) |
| TW (1) | TW201124754A (en) |
| WO (1) | WO2011013671A1 (en) |
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| CN103574346A (en) * | 2012-07-25 | 2014-02-12 | 胜华科技股份有限公司 | Light source module |
| CN110320580A (en) * | 2018-03-30 | 2019-10-11 | 惠和株式会社 | Light diffusing sheet laminated body, back light unit and liquid crystal display device |
| CN110366697A (en) * | 2017-02-27 | 2019-10-22 | 富士胶片株式会社 | Brightness uniformity component, back light unit and liquid crystal display device |
| US11143914B2 (en) | 2019-03-13 | 2021-10-12 | Keiwa Inc. | Multilayer of light diffusers, backlight unit, and liquid crystal display device |
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| TWI454798B (en) * | 2011-04-20 | 2014-10-01 | Innolux Corp | Direct type backlight module and display device using the same |
| JP5363535B2 (en) * | 2011-07-05 | 2013-12-11 | 住友化学株式会社 | Light guide plate |
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- 2010-07-27 WO PCT/JP2010/062636 patent/WO2011013671A1/en active Application Filing
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| US11360350B2 (en) | 2018-11-16 | 2022-06-14 | Keiwa Inc. | Optical sheet, backlight unit, liquid crystal display device, and information device |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201124754A (en) | 2011-07-16 |
| JP2011048355A (en) | 2011-03-10 |
| WO2011013671A1 (en) | 2011-02-03 |
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Application publication date: 20120523 |