CN1914460A - Surface light source unit-use light guide and production method therefor and surface light source unit - Google Patents
Surface light source unit-use light guide and production method therefor and surface light source unit Download PDFInfo
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- CN1914460A CN1914460A CNA2005800033945A CN200580003394A CN1914460A CN 1914460 A CN1914460 A CN 1914460A CN A2005800033945 A CNA2005800033945 A CN A2005800033945A CN 200580003394 A CN200580003394 A CN 200580003394A CN 1914460 A CN1914460 A CN 1914460A
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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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/295—Analog deflection from or in an optical waveguide structure]
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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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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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
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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
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
Abstract
The invention provides a surface light source unit comprising a primary light source (1), a light guide (3) for guiding light emitted therefrom, and a light polarization element (4) disposed on the light exit surface (33) thereof, as a surface light source unit in which a luminance unevenness, in an area near a light guide light entry end surface, caused by the thinning of a light guide is hardly recognized visually and little specific light exit is observed in an oblique direction near the light entry end surface. The light guide light entry end surface (31) is specified such that a light-guide-thickness-direction average inclined angle obtained based on measurement by a ultra-depth shape measuring microscope is 3 degrees through 12 degrees, the presence proportion of components having an inclined angle of at least 20 degrees in an inclined angle frequency distribution up to 40%, a light-guide-thickness-direction center line average roughness Ra 0.2 mum through 0.4 mum, and a light-guide-thickness-direction ten-point average roughness Rz 0.7 mum through 2.0 mum.
Description
Technical field
The light conductor and the manufacture method thereof that the present invention relates to the planar light source device of edge light mode and be used for this device, particularly relate to seek to reduce luminance nonuniformity even look the planar light source device of recognizing degree and the light conductor that is used for this device.Planar light source device of the present invention for example is suitable for use as, the back lighting of the back lighting of the back lighting of the liquid crystal indicator of the display part of the monitor of portable notebook computer etc. or liquid crystal TV set and the one-piece type liquid crystal TV set of video etc. or the more small-sized liquid crystal indicator that uses as the indicator of the display floater of portable electric appts such as mobile phone and various device, the liquid crystal indicator that uses as the back lighting of the liquid crystal indicator that uses to display board and signboard of station and communal facility etc. or as the traffic sign of highway and ordinary highway.
Background technology
Outside the display part of liquid crystal indicator as the monitor of portable notebook computer etc. or liquid crystal TV set and the one-piece type liquid crystal TV set of video etc., also more and more be used widely in other various fields.Liquid crystal indicator is made of back lighting and liquid crystal display cells basically.Consider that from the angle that makes the liquid crystal indicator compactness edge light mode is often adopted in back lighting.In the past, back lighting as the edge light mode, be extensive use of following mode: at least one end face that is about to the light conductor of rectangular plate shape uses as light-incident end, along wire or bar-shaped primary sources such as light-incident end configuration straight pipe type fluorescent lamps, the light that sends from this primary source imports light conductor inside from the light-incident end of light conductor, penetrates from the light-emitting face of one of two interareas of this light conductor.
But in recent years, on liquid crystal indicator, require the size of its display frame big as far as possible, improve display efficiency with respect to the ratio of its appearance and size.Thereby, on planar light source device, also require the size of its light-emitting area big as much as possible with respect to the ratio of its appearance and size, promptly require the size of the structure division (being sometimes referred to as " frame ") of the frame shape of existence around light-emitting area as much as possible little.
On the other hand, also require to do planar light source device thinner, for corresponding with this requirement, light conductor is necessary slimming.In the planar light source device of edge light mode, inject the light of the light-incident end of light conductor from primary source, its part to light-emitting face or the back side with the incidence angle incident more than the cirtical angle of total reflection, by inner surface total reflection leaded light, its another part is injected light-emitting face with the angle littler than the cirtical angle of total reflection, and this part penetrates from light-emitting face.Slimming (for example thickness is about 0.5mm～3mm) along with light conductor, the light that sends from primary source high briliancy part (bright line or bright band) and low briliancy partly (concealed wire or blanking bar) periodically occur relatively with the distance of leaving light-incident end under near the situation of the outgoing light-incident end of the light-emitting face of light conductor.In fact this phenomenon is not a problem under the big situation of border width especially, but under the situation of the little planar light source device of border width as described above, the problem of existence then is that the even phenomenon of luminance nonuniformity that this influence causes recognizes especially easily with visual.
Near the generation that luminance nonuniformity is spared the above-mentioned light-incident end is also relevant with the surface texture of light-incident end.Therefore, as a kind of even method of above-mentioned luminance nonuniformity that prevents, for example disclose such technology at the flat 9-160035 communique of Ri Bente Open (No. 3253001 communique of patent) (patent documentation 1), promptly the arithmetic average roughness Ra with the light-emitting face parallel direction of light-incident end is 0.05～0.3 micron.For example at Ri Bente Open 2001-83512 communique (patent documentation 2) such technology is disclosed again, the arithmetic average roughness Ra that is light-incident end is 0.05～0.3 micron, and make with the light-emitting face parallel direction on degree of roughness bigger than the degree of roughness on the light conductor thickness direction.For example at Ri Bente Open 2002-324424 communique (patent documentation 3) such technology is disclosed then again, the maximum height Ry that is light-incident end is 3～5 microns, average roughness Ra is more than or equal to 0.3 smaller or equal to 0.6, so light-incident end adopts the formation that for example has pears surface shape.Also have, for example Ri Bente Open 2000-306410 communique (patent documentation 4) discloses such technology, promptly forms the prism of 160 °～175 ° of the drift angles that form along the direction parallel with light-emitting face on light-incident end.
Patent documentation 1: the flat 9-160035 communique of Ri Bente Open (No. 3253001 communique of patent).
Patent documentation 2: Ri Bente Open 2001-83512 communique
Patent documentation 3: Ri Bente Open 2002-324424 communique
Patent documentation 4: Ri Bente Open 2000-306410 communique
Summary of the invention
If adopt the method for above-mentioned patent documentation 1～patent documentation 4, the surface texture that makes light-incident end is specific proterties, and it is even to reduce near the luminance nonuniformity of light-incident end.
But, be accompanied by the light conductor slimming brings in the planar light source device of little border width problem and also be present in top situation beyond described.Promptly, the influence that causes of working is the light that sends from primary source as secondary souce on the light conductor crest line on the border of light-incident end that forms light conductor and light-emitting face, near light-incident end, penetrate strong especially light obliquely what its normal direction relatively tilted from the light-emitting area of planar light source device, under situation about using, the quality of display graphics is reduced as the back lighting of liquid crystal indicator.
Method with above-mentioned patent documentation 1～patent documentation 4 can not fully be prevented such phenomenon.
The objective of the invention is to, a kind of planar light source device is provided, this device is visual, and to be not easy to recognize the luminance nonuniformity that takes place on light conductor light-incident end near zone that its slimming of following light conductor brings even, and near the special obliquely emergent light light-incident end is few, and a kind of light conductor that is used for this device is provided.
Adopting the present invention, is the following stated as solving above-mentioned in-problem method then,
The invention provides a kind of planar light source device light conductor, this is to be used for constituting planar light source device with primary source, and the planar light source device light conductor of the light that guiding is sent from described primary source is characterized in,
Have for the light-emitting face of the incident end face of the light incident of sending from described primary source and the light ejaculation that Gong is directed and the back side of the opposite side of this light-emitting face,
Described light-incident end, the average slope angle on its described light conductor thickness direction that measures according to super dark measuring shape microscope for more than or equal to 3 ° smaller or equal to 12 °.
In a kind of form of the present invention, described light-incident end, the ratio that the inclination angle during the number of degrees at the described inclination angle that it measures according to super dark shape measure microscope distribute exists more than or equal to 20 ° part is for smaller or equal to 40%.In a kind of form of the present invention, described light-incident end, its center line average roughness Ra according to the described light conductor thickness direction that super dark measuring shape microscope measures is smaller or equal to 0.4 micron more than or equal to 0.2 micron.In a kind of form of the present invention, described light-incident end, its 10 mean roughness Rz according to the described light conductor thickness direction that super dark measuring shape microscope measures are smaller or equal to 2.0 microns more than or equal to 0.7 micron.In a kind of form of the present invention, described light-incident end is matsurface, possess the lens arrays that comprises curve in the section configuration of on direction, be parallel to each other a plurality of lens arrays of extending and this lens arrays perpendicular to the thickness direction of described light conductor form face or possess on direction, be parallel to each other perpendicular to the thickness direction of described light conductor a plurality of lens arrays of extending and to this lens arrays at least a portion carry out the matsurface processing and the matsurface lens arrays that forms forms face.
Also have, according to the present invention, as solving above-mentioned in-problem method, provide a kind of like this planar light source device, be characterized in, described primary source and above-mentioned planar light source device dispose with the light-incident end subtend of light conductor.
In a kind of form of the present invention, described planar light source device, also possess on the light-emitting face that is disposed at described light conductor, and have the incidence surface injected for the light that penetrates from the light-emitting face of described light conductor with and the light deflection element of the exiting surface of an opposite side.In a kind of form of the present invention, described light deflection element possesses on described incidence surface a plurality of prisms row that extend and be arranged parallel to each other along the light-incident end of described light conductor, and respectively these prism row have respectively for from the 1st prism facets of the light incident of the light-emitting face of described light conductor with infeed the 2nd prism facets that the light after penetrating carries out the inner surface reflection.In a kind of form of the present invention, described primary source is linear light source or point source of light.
Also have, if adopt the present invention, then as described below as the above-mentioned in-problem method of solution,
The invention provides the manufacture method of a kind of planar light source device with light conductor, this is a kind of manufacture method of making aforesaid planar light source device with light conductor, be characterized in, by lucite is shaped, obtain the light conductor blank corresponding by the shape of duplicating this mold component surface with described light conductor, by means of this, on this light conductor blank, form comparably and the corresponding face of the described light-emitting face and the back side with this light-emitting face and the back side, then the face by the machining described light conductor blank corresponding with described light-incident end forms light-incident end, obtain described planar light source device light conductor
In addition, the invention provides the method for aforesaid planar light source device made from light conductor, be characterized in, with mold component lucite is shaped, by duplicating the shape on this mold component surface, thereby form described light-emitting face, the back side and light-incident end, obtain described planar light source device light conductor.
The invention effect
Utilize above-described the present invention, by the light-incident end of such formation planar light source device with light conductor, the average slope angle that makes the super degree of depth measuring shape microscope of basis measure the light conductor thickness direction of gained is smaller or equal to 12 ° more than or equal to 3 °, on planar light source device, visual to be difficult to recognize the luminance nonuniformity on light conductor light-incident end near zone that brings along with the light conductor attenuation even, and can reduce near the special obliquely light outgoing light-incident end.Moreover, make according to the number of degrees distribution medium dip angle at the inclination angle of super degree of depth measuring shape microscope measurement gained more than or equal to 20 ° part exist ratio smaller or equal to 40%, thereby special obliquely light outgoing is lowered fully near making light-incident end.
Description of drawings
Fig. 1 is a stereogram of schematically representing an example of planar light source device of the present invention.
Fig. 2 is the part sectioned view of the planar light source device of Fig. 1.
Fig. 3 is the part sectioned view of light conductor.
Fig. 4 is the schematic diagram of the light deflection situation in the expression light deflection element.
Fig. 5 is the schematic diagram of expression near the situation of the ejaculation of the area light the particularly light-incident end of light conductor light-emitting face.
Fig. 6 is the schematic diagram of expression near the situation of the area light ejaculation the light-incident end of the particularly light conductor of the exiting surface of light deflection element.
Symbol description
1 primary source
2 light source reflectors
3 light conductors
31 light-incident ends
The 31a prism facets
32 side end faces
33 light-emitting faces
34 back sides
4 light deflection elements
41 incidence surfaces
42 exiting surfaces
5 light reflection elements
8 liquid crystal display cells
The specific embodiment
With reference to the accompanying drawings example of the present invention is described.
Fig. 1 is a stereogram of schematically representing an example of planar light source device of the present invention, and Fig. 2 is the part sectioned view of the planar light source device of Fig. 1.As shown in FIG., the planar light source device of this example comprises at least one side end face as light-incident end 31, will with its roughly a surface of quadrature as the light conductor 3 of light-emitting face 33; With the light-incident end 31 relative configurations of this light conductor 3, use the primary source 1 of the wire of light source reflector 2 coverings; Be disposed at the light deflection element 4 on the light-emitting face of light conductor 3; And with the light reflection element 5 of the back side 34 subtends configuration of the light-emitting face 33 opposite sides of light conductor 3.
Be formed at the interarea of light conductor 3, constitute the matsurface or the lens arrays of directive property light outgoing mechanism, the scope of average slope angle θ a ' is 0.5～15 °, still, considers that it then still is desirable seeking to improve the interior briliancy uniformity of light-emitting face.The better scope of average slope angle θ a ' is 1～12 °, and more desirable scope is 1.5～11 °.Measuring method about average slope angle will be narrated below.
Again, be not endowed other interareas of directive property light outgoing mechanism, for the directive property on the parallel face (YZ face) of the primary source that is controlled at and sends emergent light from light conductor 31, preferably make and go up the lens arrays that a plurality of lens arrays of extending are arranged in the direction that is approximately perpendicular to light-incident end 31 (directions X) and form face.In example shown in Figure 1, on light-emitting face 33, form matsurface, be formed on direction (directions X) with light-incident end 31 approximate vertical overleaf on 34 and go up the lens arrays that the arrangement by a plurality of lens arrays of extending constitutes and form face.In the present invention, also can be opposite with form shown in Figure 1, on light-emitting face 33, form lens arrays and form face, the back side 34 is matsurface.
As shown in Figure 1, the lens arrays of using in the directive property that forms on the back side 34 of light conductor 3 or the light-emitting face 33 on the control YZ face forms under the situation of face, as this lens arrays, the prism row that for example roughly extend on directions X, biconvex lens row, V-shape groove etc. are arranged, but the best prism row that are shaped as subtriangular shape of YZ section.
In the present invention, forming on the back side 34 of light conductor under the situation of prism row formation face as lens arrays formation face, preferably its drift angle is in 85～110 ° of scopes.This is because can be by making this drift angle in this scope, thereby the emergent light of light conductor 3 is suitably assembled, and makes every effort to improve the briliancy of planar light source device, and better scope is 90～100 °.
In light conductor of the present invention, in order accurately to make desirable prism row shape, obtain stable optical property, simultaneously, the abrasion and the distortion at prism top when using when assembling in order to prevent or as light supply apparatus also can be made planar portions or curve part with the top of prism row.
Also have, in the present invention, also can with the light outgoing mechanism and the usefulness that on above-mentioned light-emitting face 33 or its back side 34, form, by adding and dispersed light diffusive particulate adds directive property light outgoing mechanism in that light conductor is inner.
Light-incident end 31, the average slope angle θ a of its light conductor 3 thickness directions is more than or equal to 3 °, smaller or equal to 12 °.The average slope angle θ a of direction (Z direction: with reference to Fig. 2) that makes the light conductor thickness d of light-incident end 31 is in this scope, with this expansion of light in the XZ face is suitably adjusted, the particularly light outgoing that comes near the zone the light-incident end of light conductor light-emitting face 33 (light quantity and the angle of emergence distribute) becomes suitable, follows the light conductor attenuation and even visual being not easy that become of luminance nonuniformity of the light-incident end near zone that brings found out.If discontented 3 ° of average slope angle θ a, then the outgoing light quantity of coming near the zone the light conductor light-incident end reduces, this regional briliancy became low, on the other hand, if average slope angle θ a is above 12 °, then the outgoing light quantity of coming near the zone the light conductor light-incident end increases, and this regional briliancy becomes too high, can reduce near the oblique special light outgoing of light-incident end more.The average tilt angular direction θ a of the thickness direction of the light conductor 3 of light-incident end 31 is to be advisable smaller or equal to 11 ° more than or equal to 5 °, and better is smaller or equal to 9 ° more than or equal to 6 °.
Average slope angle θ a can obtain according to the inclination angle of measuring with super dark measuring shape microscope (for example VK-8500 (trade name) of キ one エ Application ス company manufacturing).That is to say, average slope angle is by center line average roughness Ra and 10 mean roughness Rz with the faces such as light-incident end of super dark measuring shape measurement microscope light conductor 3, read the Ra in the measurement range, Rz, (Japanese: ス system-ジ Application グ) 02 condition is extracted sectional curve according to smooth to this measurement range, obtain that (scope that once can measure according to this condition determination is about 110 microns at each measuring point, therefore except the zone 50 microns of the two ends relevant with the light conductor thickness direction of light conductor light-incident end uniformly-spaced to measure 5 places) the absolute value at inclination angle, these values on average just can be drawn.
With above-mentioned average slope angle θ a, the distribution of the number of degrees at inclination angle, measuring point place also makes a difference to the light outgoing characteristic of planar light source device.Mainly be the inclination angle during particularly the number of degrees at the inclination angle that measures according to above-mentioned super dark measuring shape microscope distribute more than or equal to the ratio that exists of 20 ° part, influence near the generation of light the outgoing special obliquely light-incident end.The ratio of this existence is smaller or equal to 40%, but because reduce near the oblique special light outgoing light-incident end of planar light source device, so be more satisfactory.The number of degrees distribution medium dip angle at the inclination angle that measures according to above-mentioned super dark measuring shape microscope exists ratio better smaller or equal to 30% more than or equal to 20 ° part, and it is desirable to smaller or equal to 20% more.
Aforesaid light-incident end 31 for example is made of matsurface.The formation method of the matsurface for example method of cutting such as useful milling cutter tools, emery wheel, sand paper, polishing wheel etc. is carried out methods such as abrasive method, sandblast processing, discharge processing, electrobrightening, chemical polishing.The sandblast particle that sandblast processing is used for example has the such spheric granules of bead, the such polygonal particle of alumina particle, makes the better matsurface of light scattering effect, is comparatively ideal therefore and use the method for polygonal particle to form.By the machine direction of machining or attrition process is adjusted, can form anisotropic matsurface.In order to regulate dispersing of light in the XY face, can adopt the machine direction of Z direction, form the muscle shape concaveconvex shape of Z direction, in order to regulate dispersing of light in the XZ face, can adopt the machine direction of Y direction, form the muscle shape concaveconvex shape of Y direction.Can form the matsurface that does not have directionality by other multiple combinations of different machine directions mutually.This matsurface processing can directly be implemented on the light-incident end of light conductor, but also can utilize mold component lucite to be configured as in the metal mould device of light conductor, duplicate at the light-incident end of mold component and to be pre-formed correspondence on the face that forms usefulness and to duplicate formation face, when being shaped, it is replicated on the lucite, by like this, also can implement.
Again,, can adopt the face of the lens arrays formation face formation of a plurality of lens arrays that possessing is parallel to each other extends on the direction (Y direction) vertical with light conductor thickness direction (Z direction), replace matsurface as light-incident end 31.Can adopt the prism row as lens arrays.This lens arrays comprises curve in its XZ section configuration, this is desirable for the light diffusion effect.Fig. 3 is the enlarged drawing of the section configuration of the schematically expression light-incident end that forms such lens arrays.In this example, lens face 31a forms with the outwards outstanding curved surface of radius of curvature R, has ultimate range d for the triangular prism shape of drift angle φ spacing P.The formation method that forms face as a kind of like this lens arrays of light-incident end is suitable for the method that adopts instruments such as using milling cutter to cut.This lens arrays forms the processing of face and can directly implement on the light-incident end of light conductor, also can duplicate and be pre-formed correspondence on the face that forms usefulness and duplicate formation face utilizing mold component lucite to be configured as in the die device of light conductor light-incident end at mold component, when being shaped, it is replicated on the lucite, by like this, implement.
Also have, light-incident end 31 is that the lens arrays that possesses a plurality of lens arrays of extending of being parallel to each other on the direction (Y direction) vertical with the thickness direction (Z direction) of light conductor forms face, can adopt by the matsurface lens arrays that at least a portion face roughening in the lens arrays is formed and form the face that forms that face constitutes.This matsurface lens arrays forms the chap method of face, and methods such as abrasive method such as for example using sand paper, polishing wheel, sandblast processing, electrobrightening, chemical polishing are arranged.These matsurface processing methods can directly be implemented on the light-incident end that forms the light conductor lens arrays, also can utilize mold component lucite to be configured as in the die device of light conductor, duplicate at the light-incident end of mold component and to be pre-formed correspondence on the face that forms usefulness and to duplicate formation face, when moulding, it is replicated on the lucite, by like this, implement.
As mentioned above, with in the manufacture method of light conductor, lucite is shaped,, obtains the light conductor blank corresponding with light conductor by duplicating this mold component surface configuration with mold component at this planar light source device.By like this, the face of light conductor blank that will be corresponding with the light-emitting face of light conductor and the back side and light-emitting face and the back side form comparably.Then, carry out machining, form light-incident end, obtain the planar light source device light conductor by face to the light conductor blank corresponding with the light-incident end of light conductor.Another other light supply apparatus is shaped for make lucite with mold component with the manufacture method of light conductor, by duplicating the surface configuration of this mold component, forms light-emitting face, the back side and light-incident end, obtains above-mentioned planar light source device light conductor.
The center line average roughness Ra of the light conductor thickness direction that light-incident end 31 preferably measures according to super dark measuring shape microscope for more than or equal to 0.2 micron smaller or equal to 0.4 micron, 10 mean roughness Rz of the described light conductor thickness direction that measures according to super dark measuring shape microscope for more than or equal to 0.7 micron smaller or equal to 2.0 microns.By making it in this scope, make the number of degrees at above-mentioned average slope angle θ a and the inclination angle inclination angle in distributing exist ratio in prescribed limit easily more than or equal to 20 ° part.
Again, the surface texture of light-incident end 31 preferably, about promptly vertical with light conductor thickness direction (Z direction) direction (Y direction) of length direction, average slope angle θ a is 1～3 °, center line average roughness Ra is 0.02～0.1 micron, and 10 mean roughness Rz are 0.3～2 micron.Here, what average slope angle θ a was better is 1.3～2.7 °, and desirable especially scope is 1.5～2.5 °.What center line average roughness Ra was better is 0.03～0.08 micron, and desirable especially scope is 0.05～0.07 micron.What 10 mean roughness Rz were better is 0.4～1.7 micron, and desirable especially scope is 0.5～1.5 micron.
Be not limited to as shown in Figure 1 shape as light conductor 3, can use the light conductor of the thicker different shapes such as wedge shape of light-incident end.
Light deflection element 4 is arranged on the light-emitting face 33 of light conductor 3.The configuration that is parallel to each other generally of two interareas 41,42 of light deflection element 4 is on the position that is parallel to the XY face respectively on the whole.As incidence surface 41, another face is as exiting surface 42 for a side in the interarea 41,42 (being positioned at the interarea on light-emitting face 33 1 sides of light conductor 3).Exiting surface forms the plane parallel with the light-emitting face 33 of light conductor 3.Incidence surface 41 form a plurality of in Y side upwardly extending prism be listed as by be parallel to each other the configuration prism row formation face.Prism row formation face also can be provided with the smaller bottom flat portion of width (for example with the measure-alike degree of directions X of prism row or width than its little par) between adjacent prism row, be not listed as but bottom flat portion preferably is not set and arranges prism continuously on directions X from the utilization ratio that improves light.
Fig. 4 is the schematic diagram of the light deflection situation of expression light deflection element 4.The figure shows an example of the direct of travel of peak light (with the corresponding light of the photodistributed peak light of outgoing) from the light conductor in the XZ face 3.The peak light that goes out with the angle [alpha] oblique fire from the light-emitting face 33 of light conductor 3 is carried out the inner surface total reflection to the 1st prism facets incident of prism row by the 2nd prism facets, and roughly the normal direction to exiting surface 42 penetrates.In the YZ face, because the effect of the prism at the above-mentioned light conductor back side 34 row, can make every effort to accomplish fully to improve the briliancy of exiting surface 42 normal directions in the larger context again.
As a reference, Fig. 5 is near the schematic diagram of the situation of the area light ejaculation of the particularly light-incident end of expression light conductor light-emitting face, again, as a reference, Fig. 6 is near the schematic diagram of the situation about penetrating of the area light the light-incident end of particularly light conductor of light deflection element exiting surface of presentation surface light supply apparatus.As shown in Figure 5 and Figure 6, zone (near the zone beyond the light-incident end) at the central portion of light conductor light-emitting face 33, as shown in Figure 4, penetrate with respect to light-emitting face 33 angled α from the peak light of the light of light-incident end 31 incidents, from the one side prism facets to light deflection element 4 incidents, in the prism facets inner surface reflection of another side, to the outgoing of exiting surface normal direction.In contrast, near the light-incident end of light conductor light-emitting face 33 zone, peak light penetrates with respect to light-emitting face 33 angled β, from the one side prism facets to light deflection element 4 incidents, size according to angle beta, correspondingly be subjected to or be not subjected to internal reflecting surface influence, penetrate with angle γ with respect to exiting surface in the prism facets of the another side of light deflection element 4.
Above-mentioned angle beta is subjected to the influence of the surface texture of light conductor light-incident end 31 easily, the influence that distributed by the interior average slope angle θ a of XZ face and the inclination angle number of degrees.
If average tilt angle θ a is too small, then angle beta is less than angle [alpha], reduce from this regional outgoing light quantity, and briliancy excessive descent that therefore should the zone, the briliancy uniformity reduces easily.If average slope angle θ a is excessive, then angle beta is greater than angle [alpha], and the emergent light quantitative change that this zone is come is big, and briliancy that therefore should the zone excessively increases, and the briliancy uniformity descends easily.If angle beta is greater than angle [alpha], then is not subjected to surface, the inside face reflections affect of prism facets, and occurs only being subjected to refraction action and the part that penetrates to the light of light deflection element 4 incidents.If this part is too much, then near the regional oblique special smooth outgoing above-mentioned light exit side face just becomes very showy.
Again, if the number of degrees distribution medium dip angle at inclination angle exists ratio excessive more than or equal to 20 ° part, the light of then injecting light deflection element 4 is not subjected to the internal reflecting surface of prism facets only to be subjected to refraction action and the part of the light that penetrates increases too much, just becomes very showy in the oblique special smooth outgoing of above-mentioned light-incident end near zone.
Therefore, in the present invention, should realize the equal or light outgoing state approaching at the light-incident end near zone with it with central portion, scope with average slope angle θ a, more specifically for the inclination angle during the number of degrees at inclination angle are distributed more than or equal to 20 ° of parts exist proportion as above-mentioned particular range, keep briliancy evenly and prevent the light-incident end near zone that special light outgoing takes place obliquely with this.
In light deflection element 4, for the prism of accurately making desired shape, obtain stable optical property, the abrasion at prism top and the purpose of distortion when using when suppressing assembling simultaneously and as light supply apparatus also can be made the smooth top or the top of curved surface with the top of prism row.In this case, the width at the smooth top or the top of curved surface is smaller or equal to 3 microns, consider it is desirable from inhibition as the angle of the generation of the even pattern of the luminance nonuniformity that briliancy descends and ス テ イ キ Application グ (sticking) phenomenon causes of planar light source device, the width at the top of better is smooth top or curved surface also wants desirable smaller or equal to 1 micron with next for smaller or equal to 2 microns.
Primary source 1 is the linear light source that extends along the Y direction, can use for example fluorescent lamp or cold-cathode tube as this primary source.In this case, primary source 1 as shown in Figure 1, not only the side end face subtend with light conductor 3 one sides is provided with, and also can be provided with at the end face of an opposite side as required again.As primary source 1, also can use light emitting diode point source of lights such as (LED), particularly can use the light source of a plurality of point source of lights with the proper spacing configuration.
Light source reflector 2 is reflectors of the few loss of the light ground of primary source 1 being introduced light conductor 3.Its material can use the plastic sheeting in for example surperficial evaporation metal reflecting layer.As shown in the figure, light source reflector 2 is avoided light deflection element 4 and is passed through the light-emitting face end edge portion coiling of the outside of primary source 1 to light conductor 3 from the end edge portion outside of light reflection element 5.On the other hand, light source reflector also can be reeled through the outer exiting surface end edge portion towards light deflection element 4 of primary source 1 from the end edge portion outside of light reflection element 5.Also the reflecting member identical with such light source reflector 2 can be attached on the side end face beyond the light-incident end 31 of light conductor 3.
As light reflection element 5, for example can adopt the plastic sheeting that the metal evaporation reflecting layer is arranged on the surface.In the present invention, also can utilize the reflection layer etc. that is formed at light conductor 3 back sides by methods such as metal evaporations,, replace reflector plate as light reflection element.
Light conductor 3 of the present invention and light deflection element 4 can constitute with the synthetic resin of light transmission.Such synthetic resin has for example isobutylene resin, acrylic resin, polycarbonate resin, mylar, vinyl chloride resin.Isobutylene resin particularly, the size of light transmission, hear resistance, mechanical property, moulding processability excellence, as such isobutylene resin, preferably be the resin of main composition with methylmethacrylate, the content of methylmethacrylate is more than or equal to 80 weight %.When surface textures such as the surface texture of the matsurface that forms light conductor 3 and light deflection element 4 and prism row or biconvex lens row, also can apparatus there be the mold component of desirable surface texture that the lucite plate is carried out hot pressing and forms, can utilize methods such as screen printing, extrusion molding and injection molding to give its shape simultaneously with being shaped again.Can form structural plane with heat-curing resin or light-cured resin.Can also be that the surface of transparent bases such as the transparent membrane that constitutes such as resin or thin slice forms matsurface structure or the lens arrays arrangement architecture of being made up of the active energy ray-curable resin at mylar, acrylic resin, polycarbonate-based resin, Corvic, polyisobutene imines, also such thin slice can be connected to form one with method such as connection, welding and other transparent base.The active energy ray-curable resin can use multifunctional (methyl) acyclic compound, vinyl compound, (methyl) esters of acrylic acid, acrylic compound, (methyl) acrylic acid slaine etc.
Comprise above-mentioned primary source 1, light source reflector 2, light conductor 3, light deflection element 4 and light reflection element 5 on the light-emitting area (exiting surface 42 of light deflection element 5) of interior planar light source device, as shown in Figure 2, the liquid crystal display cells 8 of configuration transmission-type constitutes the liquid crystal indicator of planar light source device of the present invention as back-lighting with this.Liquid crystal indicator can allow the observer observe from Fig. 2 top.
Embodiment
The present invention will be described below to utilize embodiment and comparative example.
Embodiment 1
In the present embodiment, light conductor that the example of Fig. 1～4 illustrated and the planar light source device that uses this light conductor have been made.
Blasting treatment is carried out with bead in whole surface to the corrosion resistant plate of the effective area 230mm * 290mm, the thickness 3mm that made mirror finish.
On the other hand, on the surface of another piece corrosion resistant plate of making the effective area 230mm * 290mm of mirror finish, thickness 3mm, utilize machining to form duplicate surface, this duplicate surface is used to duplicate the prism row formation face of the prism row that formation is provided with 100 ° of drift angles, 15 microns of top, top radius of curvature, 50 microns of spacings continuously.
With processing two mold components that obtain as mentioned above transparent acrylic resin is carried out injection molding, obtain the rectangular of 230mm * 290mm, from a long limit to another long limit thickness from 2.2mm to 0.7mm continually varying wedge-type shape, interarea is handled and another interarea is the light conductor blank of prism row formation face through roughening.
With cutting machines with the direction of main surface parallel on make its roughening to carrying out machining with a corresponding side end face (end face of thickness 2.2mm one side), the limit (long limit) of the length 290mm of this light conductor blank.By means of this, form light-incident end, obtain having the light conductor that light-emitting face that the interarea by the roughening of light conductor blank constitutes and prism row by the light conductor blank form the back side (prism is listed on the direction vertical with light-incident end and extends) that face constitutes.Then the light-incident end of the light conductor that obtains is measured back side roughness at the light conductor thickness direction.
(VK8500 (trade name) that キ one エ Application ス company makes) measures with super dark measuring shape microscope.At first measure center line average roughness Ra and 10 mean roughness Rz of light conductor thickness direction of the light-incident end 31 of light conductor 3, read Ra, Rz in the measurement range.Object lens use 100 times.(Japanese: ス system one ジ Application グ) condition (simple average ± 2) is extracted the section configuration of light conductor thickness direction, obtains the absolute value at the inclination angle of each measuring point, and is in addition average, draws average slope angle θ a by smooth for this measurement range.Also have, under this condition determination, once the scope that can measure is about 110 microns, therefore on the zone relevant with the light conductor thickness direction of light conductor light-incident end except two ends 50 microns all uniformly-spaced 5 places are measured, each parameter is averaged, and it the results are shown in table 1.
Along the primary source 1 that the length direction of light conductor 3 configuration cold-cathode tube constitutes, make itself and light-incident end 31 subtends of light conductor 3, covered with light source reflector 2 (the silver-colored reflective film of beautiful smooth Co., Ltd. manufacturing).On the one side end face, paste light scattered reflection film 2 (the E60[trade name that eastern レ Co., Ltd. makes]), dispose the light reflection element 5 that the light diffusive reflective plate constitutes again, make itself and the back side 34 subtends as the prism row formation face of light conductor 3.Above-mentioned formation is assembled in the framework.This planar light source device, the peak-peak of its emergent light photometric distribution (in the XZ face) is 70 ° with respect to the light-emitting face normal direction, half full duration is 22.5 °.
On the other hand, the method of making prismatic lens is: be 1.5064 acrylic acid series uv curing resin with refractive index, to be 1000 microns convex curve surface shape with the radius of curvature of a square glass prism face, the opposing party's prism facets is a flat shape, and the prism that a plurality of prism row that spacing is 50 microns are provided with side by side continuously is listed as on the surface of the polyester film that is formed at 125 microns of thickness.To be configured to prism by the light deflection element 4 that the prismatic lens that obtains constitutes and be listed as light-emitting face (frosted face) 33 1 sides that form towards above-mentioned light conductor 3, the crest line of prism row is parallel to the light-incident end 31 of light conductor 3, and the prism facets of the flat shape of each prism row is towards the light-incident end 31 of light conductor 3.
Also on light deflection element 4, dispose liquid crystal display cells (LCD).
To the planar light source device that obtains as previously discussed, make primary source 1 luminous, by visual when light-emitting area is observed, roughly the same from briliancy and other parts in the zone of light conductor light-incident end 33 till directions X 30 millimeter, and near light conductor light-incident end 33, do not find special light outgoing obliquely.
Embodiment 2
When utilizing cutting apparatus to carry out machining, change accurately machined cutting speed it is slowed down a little, in addition, obtain planar light source device with embodiment 1 the same processing for a side end face roughening that makes a side corresponding with the long limit of light conductor blank.
Planar light source device for gained, after making primary source 1 luminous, by visual light-emitting area is observed, the briliancy in the zone from light conductor light-incident end 33 to directions X till 30 millimeter and other parts are roughly the same, and do not find special light outgoing near light conductor light-incident end 33 obliquely.
When utilizing cutting apparatus to carry out machining, change accurately machined cutting speed it is slowed down a little, in addition, obtain planar light source device with embodiment 1 the same processing for a side end face roughening that makes a side corresponding with the long limit of light conductor blank.
Planar light source device for gained, after making primary source 1 luminous, by visual light-emitting area is observed, the briliancy in the zone from light conductor light-incident end 33 to directions X till 30 millimeter and other parts are roughly the same, and almost do not find special light outgoing near light conductor light-incident end 33 obliquely.
Comparative example 1
When utilizing cutting apparatus to carry out machining, change accurately machined cutting speed it is slowed down greatly, in addition, obtain planar light source device with embodiment 1 the same processing for the side end face roughening that makes a side corresponding with the long limit of light conductor blank.
Planar light source device for gained, after making primary source 1 luminous, when light-emitting area was observed, other parts of the luminance ratio in the zone from light conductor light-incident end 33 to directions X till 30 millimeter were low by visual, observe darker band, the briliancy uniformity is relatively poor.And discovery obliquely has special light outgoing near light conductor light-incident end 33.
Comparative example 2
When utilizing cutting apparatus to carry out machining, change accurately machined cutting speed it is accelerated greatly, in addition, obtain planar light source device with embodiment 1 the same processing for the side end face roughening that makes a side corresponding with the long limit of light conductor blank.
Planar light source device for gained, after making primary source 1 luminous, light-emitting area is observed other part height of the luminance ratio in the zone from light conductor light-incident end 33 to directions X till 30 millimeter by visual, observe bright band, the briliancy uniformity is relatively poor.
Table 1
| Embodiment 1 | Embodiment 2 | | Comparative example 1 | Comparative example 2 | |
| Average slope angle θ (°) | 8.6 | 5.0 | 11.0 | 2.9 | 18.0 |
| There is ratio (%) in the inclination angle more than or equal to 20 ° part | 18.0 | 12.0 | 22.0 | 16.0 | 55.0 |
| Ra (micron) | 0.26 | 0.21 | 0.28 | 0.15 | 0.48 |
| Rz (micron) | 1.03 | 0.90 | 1.40 | 0.68 | 2.10 |
| Quality (briliancy distribution) | Well | Well | Well | Dark near the light-incident end | Bright near the light-incident end |
| Quality (outgoing of special light) | Do not have | Do not have | Almost do not have | Have | Do not have |
Claims (12)
1. a planar light source device light conductor is used for constituting planar light source device with primary source, guides the light that sends from described primary source, it is characterized in that,
Have for the light-emitting face of the incident end face of the light incident of sending from described primary source and the light ejaculation that Gong is directed and the back side of the opposite side of this light-emitting face,
Described light-incident end, the average slope angle on its described light conductor thickness direction that measures according to super dark measuring shape microscope for more than or equal to 3 ° smaller or equal to 12 °.
2. planar light source device light conductor according to claim 1, it is characterized in that, the ratio that described light-incident end, the inclination angle during the number of degrees at the described inclination angle that it measures according to super dark measuring shape microscope distribute exist more than or equal to 20 ° composition is for smaller or equal to 40%.
3. according to the planar light source device light conductor described in the claim 1, it is characterized in that, described light-incident end, its center line average roughness Ra according to the described light conductor thickness direction that super dark measuring shape microscope measures is smaller or equal to 0.4 micron more than or equal to 0.2 micron.
4. planar light source device light conductor according to claim 1, it is characterized in that, described light-incident end, its 10 mean roughness Rz according to the described light conductor thickness direction that super dark measuring shape microscope measures are smaller or equal to 2.0 microns more than or equal to 0.7 micron.
5. planar light source device light conductor according to claim 1 is characterized in that,
Described light-incident end is matsurface, possess the lens arrays that comprises curve in the section configuration of a plurality of lens arrays of on perpendicular to the direction of described light conductor thickness direction, extending in parallel to each other and this lens arrays form face or possess a plurality of lens arrays of on direction, extending in parallel to each other perpendicular to the thickness direction of described light conductor and to this lens arrays at least a portion carry out the matsurface processing and the matsurface lens arrays that forms forms face.
6. a planar light source device is characterized in that, the described planar light source device of described primary source and claim 1 disposes with the light-incident end subtend of light conductor.
7. planar light source device according to claim 6, it is characterized in that, also possess the top of the light-emitting face that is configured in described light conductor and have incidence surface that the light that penetrates for the light-emitting face from described light conductor enters with and the light deflection element of the exiting surface of an opposite side.
8. planar light source device according to claim 7 is characterized in that,
Described light deflection element possesses on described incidence surface a plurality of prisms row that extend and arrange in parallel to each other along the light-incident end of described light conductor, and respectively these prism row have respectively for from the 1st prism facets of the light incident of the light-emitting face of described light conductor with infeed the 2nd prism facets that the light after penetrating carries out the inner surface reflection.
9. according to each described planar light source device in the claim 6～8, it is characterized in that described primary source is a linear light source.
10. according to each described planar light source device in the claim 6～8, it is characterized in that described primary source is a point source of light.
11. the planar light source device manufacture method of light conductor, make as each described planar light source device light conductor in the claim 1～5, it is characterized in that, by lucite is shaped, obtain the light conductor blank corresponding by the shape of duplicating this mold component surface with described light conductor, by means of this, on this light conductor blank, form comparably and the corresponding face of the described light-emitting face and the back side with this light-emitting face and the back side, then the face by the machining described light conductor blank corresponding with described light-incident end forms described light-incident end, obtains described planar light source device light conductor.
12. the planar light source device manufacture method of light conductor, make as each described planar light source device light conductor in the claim 1～5, it is characterized in that, with mold component lucite is shaped, by duplicating the shape on this mold component surface, thereby form described light-emitting face, the back side and light-incident end, obtain described planar light source device light conductor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004021604A JP4553596B2 (en) | 2004-01-29 | 2004-01-29 | Light guide for surface light source device, method for manufacturing the same, and surface light source device |
| JP021604/2004 | 2004-01-29 | ||
| PCT/JP2005/001002 WO2005073624A1 (en) | 2004-01-29 | 2005-01-26 | Surface light source unit-use light guide and production method therefor and surface light source unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1914460A true CN1914460A (en) | 2007-02-14 |
| CN1914460B CN1914460B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2005800033945A Expired - Fee Related CN1914460B (en) | 2004-01-29 | 2005-01-26 | Surface light source unit-use light guide and production method therefor and surface light source unit |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4553596B2 (en) |
| KR (2) | KR100927513B1 (en) |
| CN (1) | CN1914460B (en) |
| TW (1) | TWI356235B (en) |
| WO (1) | WO2005073624A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8368841B2 (en) | 2008-10-27 | 2013-02-05 | Coretronic Corporation | Backlight module and liquid crystal display comprising a light guide plate with first, second, third microstructures, and a plurality of pillars |
| CN101737725B (en) * | 2008-11-20 | 2013-03-06 | 中强光电股份有限公司 | Backlight module and liquid crystal display |
| CN103097098A (en) * | 2010-09-30 | 2013-05-08 | 三菱丽阳株式会社 | Mold having fine irregular structure on surface, method of producing product having fine irregular structure on surface, use of product, stack expressing heterochromia and surface emitting member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020091097A1 (en) * | 2018-10-30 | 2020-05-07 | 덴탈에이스 주식회사 | Lighting device for dental treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3213496B2 (en) * | 1994-11-30 | 2001-10-02 | シャープ株式会社 | Lighting equipment |
| JPH08184829A (en) * | 1995-01-04 | 1996-07-16 | Hitachi Ltd | Lighting structure of liquid crystal display device |
| JP3064224B2 (en) * | 1995-11-27 | 2000-07-12 | 松下電工株式会社 | Lighting equipment |
| JP3286932B2 (en) * | 1995-12-14 | 2002-05-27 | 株式会社エンプラス | Sidelight type surface light source device |
| JP3253001B2 (en) * | 1995-12-14 | 2002-02-04 | 株式会社エンプラス | Sidelight type surface light source device |
| JP4308968B2 (en) * | 1999-04-22 | 2009-08-05 | 日本ライツ株式会社 | Light guide plate and flat illumination device |
| JP3965298B2 (en) * | 2000-12-27 | 2007-08-29 | 三菱化学株式会社 | LIGHT EMITTING STRUCTURE, LIGHT EMITTING METHOD, AND LIGHTING BODY |
| EP1220261A3 (en) * | 2000-12-27 | 2002-07-10 | Mitsubishi Chemical Corporation | Structured lighting material, method to generate incoherent luminescence and illuminator |
| JP4761422B2 (en) * | 2001-09-07 | 2011-08-31 | 三菱レイヨン株式会社 | Surface light source device and light guide used therefor |
| JP4323208B2 (en) * | 2002-04-22 | 2009-09-02 | 三菱レイヨン株式会社 | Surface light source device and light guide used therefor |
| US6755678B2 (en) * | 2002-04-22 | 2004-06-29 | Tyco Electronics Corporation | Wire retaining connector block |
-
2004
- 2004-01-29 JP JP2004021604A patent/JP4553596B2/en not_active Expired - Fee Related
-
2005
- 2005-01-26 CN CN2005800033945A patent/CN1914460B/en not_active Expired - Fee Related
- 2005-01-26 WO PCT/JP2005/001002 patent/WO2005073624A1/en active Application Filing
- 2005-01-26 KR KR1020087008021A patent/KR100927513B1/en not_active IP Right Cessation
- 2005-01-26 KR KR1020067017370A patent/KR20060126797A/en not_active Application Discontinuation
- 2005-01-27 TW TW094102428A patent/TWI356235B/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8368841B2 (en) | 2008-10-27 | 2013-02-05 | Coretronic Corporation | Backlight module and liquid crystal display comprising a light guide plate with first, second, third microstructures, and a plurality of pillars |
| CN101737725B (en) * | 2008-11-20 | 2013-03-06 | 中强光电股份有限公司 | Backlight module and liquid crystal display |
| CN103097098A (en) * | 2010-09-30 | 2013-05-08 | 三菱丽阳株式会社 | Mold having fine irregular structure on surface, method of producing product having fine irregular structure on surface, use of product, stack expressing heterochromia and surface emitting member |
| CN103097098B (en) * | 2010-09-30 | 2015-11-25 | 三菱丽阳株式会社 | Mould, surface that surface has a micro concavo-convex structure have the article manufacturing method of micro concavo-convex structure, article purposes, the laminate embodying heterochromia and planar luminous body |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080035704A (en) | 2008-04-23 |
| TW200535519A (en) | 2005-11-01 |
| JP4553596B2 (en) | 2010-09-29 |
| KR100927513B1 (en) | 2009-11-17 |
| KR20060126797A (en) | 2006-12-08 |
| CN1914460B (en) | 2011-07-20 |
| WO2005073624A1 (en) | 2005-08-11 |
| JP2005216665A (en) | 2005-08-11 |
| TWI356235B (en) | 2012-01-11 |
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