CN101324681A - High luminance light guide board - Google Patents
High luminance light guide board Download PDFInfo
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- CN101324681A CN101324681A CNA2007101109783A CN200710110978A CN101324681A CN 101324681 A CN101324681 A CN 101324681A CN A2007101109783 A CNA2007101109783 A CN A2007101109783A CN 200710110978 A CN200710110978 A CN 200710110978A CN 101324681 A CN101324681 A CN 101324681A
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- light guide
- emergence face
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Abstract
The invention relates to a high-luminance light guide plate. The high-luminance light guide plate is a plate body which is formed by transparent resin with high refractive index, wherein, a lighting structure is arranged on the side edge of the light guide plate; the surface of the light guide plate is a light emitting surface; the back surface of the light guide plate which is opposite to the light emitting surface is a reflection surface; a plurality of concave groove chambers are arranged at the reflection surface to constitute a diffused pattern; the groove chambers are staggered, and the distribution density of the groove chambers is gradually increased by being far away from the lighting structure; the lighting structure is composed of a first lighting surface and a second lighting surface by adjacent connection, wherein, the first lighting surface and the light emitting surface form an acute angle connection, the second lighting surface and the reflection surface form the acute angle connection, when the light passes through the lighting structure, the light is pointed to the light emitting surface and the reflection surface through the refraction by the first and the second lighting surfaces and reflected by the groove chambers, thereby improving the light-emitting efficiency of the light which passes through the light emitting surface for being emitted out of the light guide plate.
Description
Technical field
The present invention is relevant with the planar light source device of side incident, knows clearly it, refers to especially utilizing pointolite (light emitting diode) as a kind of high luminance light guide board in the planar light source device of light-emitting component.
Background technology
Known planar light source device mainly comprises a light guide plate, one illuminating part and a reflecting plate, wherein, light guide plate is that the transparent resin of high index of refraction forms, and in its back side (then claim reflecting surface) is processed to form diffusion patterned (pattern) that is distributed and constituted by most groove chambers (cell), make that light guide plate and reflecting surface facing surfaces are light emergence face, one side of light guide plate is that incidence surface is relative with illuminating part, throw light enters light guide plate inside by incidence surface according to this, reflecting plate is to be attached at the lamellar body that reflecting surface has high reflectance, in the light reflected back light guide plate that will be passed reflecting surface by reflecting plate.
As shown in Figure 1, the illuminating part 2 of planar light source device mainly has a light-emitting component 201 and a light projector structure 202, wherein, the incidence surface 101 of light-emitting component 201 1 sides and light guide plate 1 is adjacent, light projector structure 202 is located at light-emitting component 201 opposite sides, because light-emitting component 201 emitted lights are outwards to penetrate radially according to its center, so, the light that light-emitting component 201 is sent, a part of light is invested incidence surface 101 and is entered light guide plate 1, the a part of light projector structure 202 of investing, by light projector structure 202 these portions of light alignment incidence surface 101 directions are reflected, make it be able to enter light guide plate 1 inside by incidence surface 101, improve the utilization factor of illuminating part 2 emitted lights thus, if light guide plate 1 is decided to be X-axis along the direction of incidence surface 101 amplitudes, direction perpendicular to incidence surface 101 is decided to be Y-axis, direction perpendicular to light emergence face 102 is decided to be the Z axle, enter the light of light guide plate 1 inside by incidence surface 101, most light is away from incidence surface 101 along the direction that is parallel to X-Y plane, as shown in Figure 2, the incidence surface 101 of known light guide plate 1 is to be connected the continuous wavy surface that constitutes by most arcwall faces, and incidence surface 101 is parallel with the Z axle, when light enters light guide plate 1 inside by incidence surface 101, by incidence surface 101 refracted rays, make light be able to radial being dispersed on the X-Y plane, towards advancing (as shown in Figure 3) away from the direction of incidence surface 101, when the light of major part is when the direction that is parallel to X-Y plane is advanced, light takes place easily can't balancedly distribute to be projeced into and constitute diffusion patterned all grooves chamber.
The illuminating part throw light enters light guide plate inside by incidence surface, light repeats between light emergence face and reflecting surface carries out total reflection, and light is closed in light guide plate inside towards the direction transmission away from illuminating part, thus, the light that in light guide plate, transmits, when being projected to reflecting surface, a part of light by the groove chamber to light emergence face scattered reflection, at this moment, towards the light of light emergence face to throw less than the cirtical angle of total reflection, to penetrate the light guide plate outside by light emergence face, another part is the light of groove chamber scattered reflection not, the plate that then is reflected reflects back into light guide plate inside, and be closed in the light guide plate once again, to prevent that by reflecting plate light from passing the light loss at the light guide plate back side, thus, though planar light source device reduces the loss that light passes by attach reflecting plate at the light guide plate back side, but make the integral thickness of planar light source device further to reduce relatively, if need not rely on the use of reflecting plate, can avoid light to pass the loss at the light guide plate back side, and then effectively reduce the volume and the manufacturing cost thereof of planar light source device.
As Fig. 4, shown in Figure 5, be formed at reflecting surface 103 and constitute most diffusion patterned groove chambers 104, mainly be that being configured in illuminating part 2 is on most row circular arc lines at center, and the groove chamber 104 that is disposed at adjacent column interlaces each other, in addition, along with away from incidence surface 101, the distribution density of groove chamber 104 is cumulative, and at contiguous incidence surface 101 places, the distribution density of groove chamber 104 is homogeneous roughly, groove chamber 104 is generally to be triangular shape at the section perpendicular to light emergence face 102 directions, making the trough wall surface of groove chamber 104 neighborwise incidence surfaces, 101 sides is first 1042, trough wall surface away from incidence surface 101 sides is second 104 4, first, two 1042,1044 are respectively straight shape plane, when ray cast reflects towards light emergence face 102 in groove chamber 104, and when penetrating light emergence face 102, owing to leave the medium that only injects to little refractive index of light guide plate 1 from light emergence face 102 from the medium of big refractive index, so light will penetrate with the direction that departs from light emergence face 102 normals, at this moment the light that is penetrated by light emergence face by light guide plate inside becomes and levels off to haply along the dolichostenomelia of the Y direction light to the sexual type sample, because effective visual angle of human eye is about 5 °～10 °, and can't visually discover the outer ejaculation light of this angular field of view, so most light by the light emergence face ejaculation, can't receive fully for human eye, in this state, when when Z-direction is watched, the light briliancy that visual gained penetrates light guide plate is lower, and the luminescence efficiency that is unfavorable for illuminating part, so be equipped with stupefied eyeglass above the many light emergence faces in light guide plate of known planar light source device, make from the light of light emergence face ejaculation, via stupefied eyeglass light is concentrated the convergence Z-direction, to improve the light briliancy of visual gained; By being as can be known, if can more level off to along direction (Z-direction) perpendicular to light emergence face by the irradiant sensing sexual type of light emergence face sample, make more rays enter effective visual angle of human eye, need not rely on the use of stupefied eyeglass, can improve the briliancy of the light of ejaculation light guide plate in Z-direction, and then the luminescence efficiency of lifting illuminating part, and thickness, volume and the manufacturing cost thereof of reduction planar light source device.
Moreover, because first and second face 1042,1044 is respectively straight shape plane, pass the light of light emergence face 102 by 104 scattered reflections of groove chamber, mainly be distributed in long and narrow face territory, and the major axis in this long and narrow face territory is along Y direction, minor axis then is the straight shape direction along first and second face 1042,1044, then form tangible bright line, dark line, and must utilize diffuser plate to make the light diffusion atomizing of ejaculation light guide plate, and then influence of the briliancy reduction of the light of ejaculation light guide plate, and be unfavorable for the luminescence efficiency of illuminating part in Z-direction.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of high luminance light guide board, when light enters light guide plate by light entrance structures thereof, point to reflecting surface and light emergence face by the light entrance structures thereof refracted ray, make the illuminating part projection enter the light of light guide plate, balancedly being distributed to be projeced into constitutes diffusion patterned all grooves chamber, for improving luminescence efficiency and taste.
Another purpose of the present invention is to provide a kind of high luminance light guide board, it is by incidence surface and diffusion patterned cooperating, and be able to effectively promote the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction, and then the luminescence efficiency of raising planar light source device, and the volume and the manufacturing cost of reduction planar light source device.
Another object of the present invention is to provide a kind of high luminance light guide board, its by plating in the light guide plate back side and the reflectance coating of groove chamber surface, reflection ray avoids light to be passed by the light guide plate back side, improving the validity that light is advanced in light guide plate inside, and reduce the volume and the manufacturing cost of planar light source device.
The invention provides a kind of high luminance light guide board, it is by the formed plate body of the transparent resin of high index of refraction, it is characterized in that, wherein, the light guide plate lateral margin is provided with light entrance structures thereof, make the light guide plate surface be light emergence face, light guide plate is a reflecting surface in the light emergence face opposing backside surface, light emergence face is parallel with reflecting surface, and light emergence face and reflecting surface lateral margin join with light entrance structures thereof respectively, and light guide plate constitutes diffusion patterned in most groove chambers of reflecting surface depression, and the groove chamber is interconnected, and along with away from light entrance structures thereof, the distribution density of groove chamber is cumulative;
Light entrance structures thereof is to be made of one first incidence surface and one second incidence surface adjacency, wherein, forming acute angle between first incidence surface and light emergence face joins, forming acute angle between second incidence surface and reflecting surface joins, when making light pass through light entrance structures thereof, point to light emergence face, reflecting surface by first and second incidence surface refraction, for improving light penetrates light guide plate by light emergence face luminescence efficiency.
Wherein, the angle between light and light emergence face, reflecting surface is 15 °～45 °;
The groove chamber is to be triangular shape at the section perpendicular to the light emergence face direction, making the inclined-plane of groove chamber neighborwise light entrance structures thereof side is first, inclined-plane away from the light entrance structures thereof side is second, pitch angle between first and reflecting surface is 30 °～45 °, reflecting surface plating reflectorized material forms reflectance coating, and reflectance coating covers the surface and the reflecting surface of groove chamber, for improving the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction, and reduces the volume and the manufacturing cost of planar light source device.
Wherein, the pitch angle between first and reflecting surface is preferable with 42.5 °.
Wherein, the pitch angle between second of the groove chamber and reflecting surface is 45 °, for the fiduciary level that improves scattered reflection light and the easiness of processing.
Wherein, first and second incidence surface is to be the arc that is mutually symmetrical in the transversal section of light emergence face vertical direction.
Wherein, the normal of first incidence surface and light emergence face abutting end and the angle between light emergence face are 20 °, first incidence surface is in the arc other end and the second incidence surface adjacency, and normal that it is terminal and the angle between light emergence face are 40 °, and first incidence surface is in the normal of arc mid point and the angle γ between light emergence face
2It is 30 °, for constituting light entrance structures thereof.
Wherein, this each incidence surface is the wavy surface that is made of most cambered surface tandem arrays respectively.
Wherein, first and second face of groove chamber is respectively arc-shaped surface at the section that is parallel to the light emergence face direction, the center of circle of first and second face lays respectively at first and second face away from the light entrance structures thereof side, and first and second face is formed at respectively between its center of circle and the light entrance structures thereof, for improving luminescence efficiency and taste.
Wherein, first of the groove chamber two ends tangent line angle to each other is 150 °.
Description of drawings
For making technical characterictic of the present invention, purpose and effect thereof be obtained more deep understanding and approval, after below preferable feasible specific embodiment of act and conjunction with figs. are illustrated in, wherein:
Fig. 1 is the side schematic view of known planar light source device.
Fig. 2 is that known light guide plate is in incidence surface schematic perspective view partly.
Fig. 3 is known light guide plate light inlet track synoptic diagram.
Fig. 4 is the floor map of known light guide plate, is formed at the diffusion patterned of the light guide plate back side with expression.
Fig. 5 is the partial enlarged view of known light guide plate in groove chamber part part.
Fig. 6 is the floor map of first embodiment of the invention, is formed at the diffusion patterned of the light guide plate back side with expression.
Fig. 7 is the 7-7 diagrammatic cross-section of Fig. 6.
Fig. 8 is that first embodiment of the invention is in light entrance structures thereof sectional perspective synoptic diagram partly.
Fig. 9 is a first embodiment of the invention light inlet track synoptic diagram.
Figure 10 is the floor map of second embodiment of the invention, is formed at the diffusion patterned of the light guide plate back side with expression.
Figure 11 is that second embodiment of the invention is in light entrance structures thereof sectional perspective synoptic diagram partly.
Figure 12 is a second embodiment of the invention light inlet track synoptic diagram.
Figure 13 is the side cross-sectional schematic of third embodiment of the invention.
Figure 14 is the partial enlarged view of third embodiment of the invention in groove chamber part part.
Figure 15 is first kind of optical track mark of third embodiment of the invention synoptic diagram.
Figure 16 is second kind of optical track mark of third embodiment of the invention synoptic diagram.
Figure 17 is the third optical track mark synoptic diagram of third embodiment of the invention.
Figure 18 is the 4th kind of optical track mark synoptic diagram of third embodiment of the invention.
Figure 19 is the 5th a kind of optical track mark synoptic diagram of third embodiment of the invention ().
Figure 20 is the 5th a kind of optical track mark synoptic diagram of third embodiment of the invention (two).
Figure 21 is the bright dipping track synoptic diagram of third embodiment of the invention.
Figure 22 is the partial enlarged view of fourth embodiment of the invention in groove chamber part part.
Figure 23 is the bright dipping track synoptic diagram of fourth embodiment of the invention.
Figure 24 is the partial enlarged view of fifth embodiment of the invention in groove chamber part part.
Figure 25 is the bright dipping track synoptic diagram of fifth embodiment of the invention.
Figure 26 is the partial enlarged view of sixth embodiment of the invention in groove chamber part part.
Figure 27 is the bright dipping track synoptic diagram of sixth embodiment of the invention.
Figure 28 is that seventh embodiment of the invention is in light entrance structures thereof section enlarged diagram partly.
Figure 29 is the schematic top plan view of eighth embodiment of the invention groove chamber.
Figure 30 is the optical track mark synoptic diagram of eighth embodiment of the invention.
Figure 31 is the side cross-sectional schematic of light guide plate, and it is the comparison that shows the light inlet track of the present invention and known light guide plate.
Embodiment
First embodiment of the invention is as Fig. 6, shown in Figure 7, light guide plate 10 is by the formed plate body of the transparent resin of high index of refraction, light guide plate 10 lateral margins are provided with light entrance structures thereof 11, according to making light enter light guide plate 10 when inner by this light entrance structures thereof 11, light is able to radial dispersion towards advancing away from the direction of light entrance structures thereof 11, make light guide plate 10 surfaces be light emergence face 12, light guide plate 10 is a reflecting surface 13 in light emergence face 12 opposing backside surface, light emergence face 12 is parallel with reflecting surface 13, and light emergence face 12 and reflecting surface 13 lateral margins join with light entrance structures thereof 11 respectively, light guide plate 10 constitutes diffusion patterned in most groove chambers of reflecting surface 13 depressions 14, groove chamber 14 is interconnected, and along with away from light entrance structures thereof 11, the distribution density of groove chamber 14 is cumulative, and this partly constitutes is identical with known person; As shown in Figure 8, light entrance structures thereof 11 is to be made of one first incidence surface 112 and one second incidence surface, 114 adjacency, and 12 of first incidence surface 112 and light emergence faces form acute angle and join, 13 of second incidence surface 114 and reflectings surface form acute angle and join, and first, two incidence surfaces 112,114 is to be the arc that is mutually symmetrical in the transversal section of light emergence face 12 vertical direction, invest the light of light guide plate 10 according to making illuminating part, during by light entrance structures thereof 11, by first, two incidence surfaces 112,114 reflect and sensing light emergence face 12, reflecting surface 13 is for improving light penetrates light guide plate 10 by light emergence face 12 light utilization efficiency.
As Fig. 8, shown in Figure 9, the first embodiment of the invention application implementation is when planar light source device, illuminating part 92 is located at light entrance structures thereof 11 adjacents, when illuminating part 92 throw lights enter light guide plate 10 inside by light entrance structures thereof 11, by respectively with light emergence face 12, reflecting surface 13 form that acute angles join first, two incidence surfaces 112,114 refracted rays, the distribution of light field domain is divided into two, point to light emergence face 12 respectively, reflecting surface 13, in view of the above, illuminating part 92 projections enter the light of light guide plate 10, be projeced into the diffusion patterned all grooves chamber of formation, for improving luminescence efficiency and taste.
See also Figure 31, the optical track mark that makes the incidence surface of illuminating part throw light by known light guide plate enter light guide plate inside is that Pa, illuminating part throw light are Pb by the optical track mark that light entrance structures thereof of the present invention enters light guide plate inside, and, be that the direction of X-axis, vertical light outgoing plane is the Z axle perpendicular to the direction of incidence surface (light entrance structures thereof) amplitude; After light enters light guide plate by known incidence surface, see it by the light guide plate side surface direction, it is the axle center that optical track mark Pa is distributed in the X-axis, and in the X-Z face forms the single wide face territory scope of fan-shaped distribution, and main lightness plane territory concentrates on the X-axis adjacent, so, light takes place and can't balancedly distribute to be projeced into and constitute diffusion patterned all grooves chamber in known light guide plate easily, and illuminating part is in the light of light guide plate projection, some is positioned at angle between the normal that light divides the light of cloth cover territory edge and incidence surface greater than the angle of total reflection, can't penetrate the incidence surface refraction and enter light guide plate inside, and scatter and disappear outside light guide plate, luminescence efficiency is formed adverse effect; After light enters light guide plate by light entrance structures thereof of the present invention, see it by the light guide plate side surface direction, optical track mark Pb mainly is distributed in two face territories, each face territory is narrow compared to the wide face territory that known light guide plate optical track mark Pa is distributed, and each face territory is oblique sensing light emergence face respectively, reflecting surface, make the light that enters light guide plate inside be able to by light emergence face, the total reflection repeatedly of reflecting surface, constitute diffusion patterned all grooves chamber and invest more efficiently, moreover, illuminating part is in the light of light guide plate projection, some is positioned at angle between the normal that light divides the light of cloth cover territory edge and incidence surface less than the angle of total reflection, and penetrable incidence surface refraction enters light guide plate inside, really can effectively improve luminescence efficiency.
Second embodiment of the invention is to change and get the not repeat specification then of identical part according to first embodiment.
As Figure 10 and shown in Figure 11, second embodiment of the invention, light guide plate 20 is provided with light entrance structures thereof 21 in a side middle section, according to making light enter light guide plate 20 when inner by this light entrance structures thereof 21, light is able to radial dispersion towards advancing away from the direction of light entrance structures thereof 21, light entrance structures thereof 21 is to be made of one first incidence surface 212 and one second incidence surface, 214 adjacency, wherein, along light entrance structures thereof 21 amplitude directions, this each incidence surface 212,214 is respectively to be connected the wavy surface that constitutes by most cambered surfaces.
As shown in figure 12, the second embodiment of the invention application implementation is when planar light source device, illuminating part 92 is located at light entrance structures thereof 21 adjacents, order is an X-axis along the direction of light entrance structures thereof 21 amplitudes, direction perpendicular to light entrance structures thereof 21 is a Y-axis, when illuminating part 92 throw lights enter light guide plate 20 inside by light entrance structures thereof 21, light is able to the radial sector territory that is dispersed on the X-Y plane, towards advancing away from the direction of light entrance structures thereof 21, and by first, two incidence surfaces 212,214 wavy surface refracted ray, and the segment angle 6 in the sector territory of distribution of light is able to more carry out by 120 °～130 ° and is diffused as 150 °～160 °, in view of the above, illuminating part 92 projections enter the light of light guide plate 20, are balancedly distributed to be projeced into to constitute diffusion patterned all grooves chamber, for improving luminescence efficiency and taste.
Third embodiment of the invention is to change and get the not repeat specification then of identical part according to first and second embodiment.
As shown in figure 13, third embodiment of the invention is by the light entrance structures thereof refracted ray, when making light enter light guide plate 30 inside by light entrance structures thereof, the main light emergence face 32 that points to, reflecting surface 33, and light and light emergence face 32, the angle that reflecting surface is 33 is 15 °～45 °, as shown in figure 14, constituting diffusion patterned groove chamber 34 is to be asymmetrical triangle at the section perpendicular to light emergence face 32 directions, making the inclined-plane of groove chamber 34 neighborwise light entrance structures thereofs, 31 sides is first 342, inclined-plane away from light entrance structures thereof 31 sides then is second 344, the inclined angle alpha that first 342 and reflecting surface are 33 is 30 °, the angle of inclination beta that second 344 and reflecting surface are 33 is 45 °, moreover, reflecting surface 33 even plating one deck reflectorized materials form reflectance coating 35, and reflectance coating 35 fills part surface and the reflecting surface 33 that cover groove chamber 34, for constituting high luminance light guide board.
Because after light enters light guide plate 30 inside by light entrance structures thereof 31 refractions, light points to light emergence face 32 respectively with 15 °～45 ° angles, reflecting surface 33, and light forms two stocks and does not point to light emergence face 32, reflecting surface 33 is fan-shaped field domain scope, the segment angle of these field domains is about 30 °, when light from light emergence face 32 total reflections when reflecting surface 33 advances, avoid the optical track mark to be projeced into second 344, make effective optical track mark direction and angle is unlikely is changed, improve the fiduciary level of scattered reflection light in view of the above, then the angle of inclination beta of 33 of second 344 and reflectings surface can be and is equal to or greater than 45 °, consider that again reflectance coating 35 is formed at second 344 the fiduciary level and the easiness of processing, the angle of inclination beta that second 344 and reflecting surface are 33 is preferable with 45 °.
When third embodiment of the invention is applied to planar light source device, illuminating part enters light guide plate 30 by light entrance structures thereof 31 throw lights, and illuminating part is injected the light of light guide plate 30, point to light emergence face 32, reflecting surface 33 by light entrance structures thereof 31 refractions, and the angle between light and light emergence face 32, the reflecting surface 33 is 15 °～45 °, and repeat total reflection at the light emergence face 32 and 33 of the reflectings surface of light guide plate 30, advance towards direction in light guide plate 30 inside simultaneously away from illuminating part; By forming of reflectance coating 35, thus light advance when running into reflecting surface 33 and groove chamber, will be towards light emergence face 32 total reflections.
The bright dipping track of third embodiment of the invention can be summarized as follows several traveling modes of row:
1. see also Figure 15, when light P with θ
2Invest light emergence faces 32 for=15 °, then light P is invested first 342 by total reflection, again since the formation of reflectance coating 35 and by first 342 to the reflection of light emergence face 32 directions, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=45 °, and normal N
1And the angle theta that light emergence face is 32
4=60 °, thus light P by first 342 by reflectance coating 35 after light emergence face 32 reflection, the normal N of light P and light emergence face 32
2Angle theta
6=15 °, critical angle less than total reflection, so light P can reflect light guide plate 30 by light emergence face 32, and it is to transmit to advance between different mediums that light P leaves light guide plate 30 by light emergence face 32, so add this parameter of refractive index, after light P leaves light guide plate 30 by light emergence face 32, light P and light emergence face 32 normal N
2Between emergence angle
And its deflection is throwed away from the illuminating part direction.
2. see also Figure 16, when light P with θ
2Invest light emergence faces 32 for=20 °, then light P is invested first 342 by total reflection, again since the formation of reflectance coating 35 and by first 342 to the reflection of light emergence face 32 directions, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=40 °, and normal N
1And the angle theta that light emergence face is 32
4=60 °, thus light P by first 342 by reflectance coating 35 after light emergence face 32 reflection, the normal N of light P and light emergence face 32
2Angle theta
6=10 °, less than the critical angle of total reflection,, add the refractive index parameter so light P can reflect light guide plate 30 by light emergence face 32, after can getting light P and leaving light guide plate 30 by light emergence face 32, light P and light emergence face 32 normal N
2Between emergence angle
And its deflection is throwed away from the illuminating part direction.
3. see also Figure 17, when light P with θ
2Invest light emergence faces 32 for=30 °, then light P is invested first 342 by total reflection, again since the formation of reflectance coating 35 and by first 342 to the reflection of light emergence face 32 directions, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=30 °, and normal N
1And the angle theta that light emergence face is 32
4=60 °, thus light P by first 342 by reflectance coating 35 after light emergence face 32 reflection, light P promptly penetrates light guide plate 30 with the direction perpendicular to light emergence face 32.
4. see also Figure 18, when light P with θ
2Invest light emergence faces 32 for=40 °, then light P is invested first 342 by total reflection, again since the formation of reflectance coating 35 and by first 342 to the reflection of light emergence face 32 directions, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=20 °, light P by first 342 by reflectance coating 35 after light emergence face 32 reflection, the normal N of light P and light emergence face 32
2Angle theta
6=10 °, so light P can reflect light guide plate 30 by light emergence face 32, add the refractive index parameter, after can getting light P and leaving light guide plate 30 by light emergence face 32, light P and light emergence face 32 normal N
2Between emergence angle
And its deflection illuminating part direction projection.
5. see also Figure 19, when light P with θ
2Invest reflecting surface 33 for=15 °, and total reflection invests first 342 of groove chamber 34, and then light P is invested first 342 by total reflection, again because the formation of reflectance coating 35 and being reflected to light emergence face 32 directions by first 342, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=75 °, and normal N
1And the angle theta that light emergence face is 32
4=60 °, thus light P by first 342 after light emergence face 32 total reflections, the angle theta that light P and light emergence face are 32
5=45 °, so light P can be by light emergence face 32 to reflecting surface 33 direction total reflections; Thereafter, the traveling mode of light P is as shown in figure 20, when light P with θ
5Invest light emergence faces 32 for=45 °, then light P is invested first 342 by total reflection, again since the formation of reflectance coating 35 and by first 342 to the reflection of light emergence face 32 directions, at this moment, light P and first 's 342 normal N
1Between incident angle and reflection angle θ
3=15 °, thus light P by first 342 by reflectance coating 35 after light emergence face 32 reflection, the normal N of light P and light emergence face 32
2Angle theta
6=15 °, less than the critical angle of total reflection,, add the refractive index parameter so light P can reflect light guide plate 30 by light emergence face 32, after can getting light P and leaving light guide plate 30 by light emergence face 32, light P and light emergence face 32 normal N
2Between emergence angle
And its deflection illuminating part direction projection.
In view of the above, when light P runs into first 342 of groove chamber 34 on the travel path, promptly by reflectance coating 35 to light emergence face 32 total reflections, make light P and light emergence face 32 by light entrance structures thereof 31, the angle that reflecting surface is 33 is to be 15 °～45 °, the mating groove chamber 34 again, the formation of reflectance coating 35, the optical track mark that penetrates light emergence face 32 mainly concentrate on the direction vertical with light emergence face 32 and ± 23 ° of scopes between, seeing also Figure 21 is to utilize Speos software to carry out the bright dipping track distribution figure that computer simulation draws the 3rd embodiment, wherein, the brightness of penetrating with vertical light outgoing plane 32 directions can reach about 7.55 candle lights (cd) for the highest, do not need to install additional prismatic lens, can effectively improve the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction, and by forming of reflectance coating 35, not only planar light source device does not need to attach reflecting plate, can avoid light to pass again by the light guide plate back side, improving validity and the taste that light is advanced in light guide plate inside, and reduce the thickness of planar light source device, volume and manufacturing cost.
Fourth embodiment of the invention is to change and get the not repeat specification then of identical part according to the 3rd embodiment; See also Figure 22, the inclined-plane of the groove chamber 44 neighborwise light entrance structures thereof sides of fourth embodiment of the invention is first 442, and the inclined angle alpha of 43 of first 442 and reflectings surface is to be 40 °; See also Figure 23, the bright dipping track of fourth embodiment of the invention distributes, the brightness of penetrating with vertical light outgoing plane direction can reach about 14.2 candle lights (cd) for the highest, and the bright dipping track mainly is distributed in vertical light outgoing plane direction ± 10 ° of scopes, really can effectively improve the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction.
Fifth embodiment of the invention is to change and get the not repeat specification then of identical part according to the 3rd embodiment; See also Figure 24, the inclined-plane of the groove chamber 54 neighborwise light entrance structures thereof sides of fifth embodiment of the invention is first 542, and the inclined angle alpha of 53 of first 542 and reflectings surface is to be 42.5 °; See also Figure 25, the bright dipping track of fifth embodiment of the invention distributes, the brightness of penetrating with vertical light outgoing plane direction can reach about 16.93 candle lights (cd) for the highest, and the bright dipping track mainly is distributed in vertical light outgoing plane direction ± 10 ° of scopes, really can effectively improve the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction.
Sixth embodiment of the invention is to change and get the not repeat specification then of identical part according to the 3rd embodiment; See also Figure 26, the inclined-plane of the groove chamber 64 neighborwise light entrance structures thereof sides of sixth embodiment of the invention is first 642, and the inclined angle alpha of 63 of first 642 and reflectings surface is to be 45 °; See also Figure 27, the bright dipping track of sixth embodiment of the invention distributes, with the vertical light outgoing plane and be partial to the oblique brightness of 5 ° of directions of light entrance structures thereof and can reach about 15.14 candle lights (cd) for the highest, and the bright dipping track mainly is distributed in vertical light outgoing plane direction ± 10 ° of scopes, and still can reach about 11.38 candle lights (cd) perpendicular to the brightness that the light emergence face direction penetrates, really can effectively improve the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction.
Seventh embodiment of the invention is to change and get the not repeat specification then of identical part according to first and second embodiment.
As the shown in Figure 28, first and second incidence surface 712,714 of seventh embodiment of the invention is arc-shaped sections perpendicular to the transversal section of light emergence face 72 directions, wherein, and the normal n of first incidence surface 712 and light emergence face 72 abutting ends
1And the angle γ that light emergence face is 72
1 Be 20 °, first incidence surface 712 is in the arc other end and second incidence surface, 714 adjacency, and its terminal normal n
3And the angle γ that light emergence face is 72
3 Be 40 °, first incidence surface 712 is in the normal n of arc mid point
2And the angle γ that light emergence face is 72
2It is 30 °, for constituting light entrance structures thereof 71.
In view of the above, when 71 refractions of light penetration light entrance structures thereof enter light guide plate 70 inside, first and second incidence surface 712,714 is by its space kenel, make light refraction and point to light emergence face 72, reflecting surface 73, and the angle between light and light emergence face 72, the reflecting surface 73 is 15 °～45 °, cooperate the groove chamber that is same as the 3rd embodiment with this, and be improved light penetrates light guide plate 70 by light emergence face 72 light utilization efficiency and taste.
Eighth embodiment of the invention is to change and get the not repeat specification then of identical part according to the 3rd embodiment.As shown in figure 29, the groove chamber 84 neighborwise light entrance structures thereof sides of eighth embodiment of the invention are first 842, away from the light entrance structures thereof side is second 844, first and second face 842,844 is respectively arc-shaped surface at the section that is parallel to the light emergence face direction, the center of circle of first and second face 842,844 lays respectively at first and second face 842,844 away from the light entrance structures thereof side, and first and second face 842,844 is formed at respectively between its center of circle and the light entrance structures thereof, moreover, first 842 two ends tangent line T
1, T
2Angle to each other is 150 °.
The ray cast of transmitting in light guide plate is during to groove chamber 84 (as shown in figure 30), a part of light P
1Run into first 842 axis zone and to the light emergence face reflection, and its direct of travel on X-Y plane be towards first 842 the center of circle away from illuminating part, another light P partly
2, P
3Then be projeced into place, first 842 contiguous two ends respectively, because first 842 be to be arc-shaped surface at the section that is parallel to the light emergence face direction, and first 842 two ends tangent line T
1, T
2Angle to each other is 150 °, makes to be projeced into the light P that first 842 contiguous two ends are located
2, P
3Except that to the light emergence face reflection, scattered reflection laterally more respectively, the feasible light that passes light emergence face by 84 scattered reflections of groove chamber, the face territory of its distribution is mainly and is similar to circular face territory, avoided forming tangible bright line, dark line therefrom, planar light source device can not need to be provided with diffuser plate again and eliminate bright line, dark line, and helps improving luminescence efficiency.
Described before combining, the present invention is made of innovation, really can fill part and satisfy intended purposes, does not also see before the application openly, really meets the condition of patent of invention, so file an application in accordance with the law.
Claims (9)
1. high luminance light guide board, it is by the formed plate body of the transparent resin of high index of refraction, it is characterized in that, wherein, the light guide plate lateral margin is provided with light entrance structures thereof, make the light guide plate surface be light emergence face, light guide plate is a reflecting surface in the light emergence face opposing backside surface, light emergence face is parallel with reflecting surface, and light emergence face and reflecting surface lateral margin join with light entrance structures thereof respectively, and light guide plate constitutes diffusion patterned in most groove chambers of reflecting surface depression, and the groove chamber is interconnected, and along with away from light entrance structures thereof, the distribution density of groove chamber is cumulative;
Light entrance structures thereof is to be made of one first incidence surface and one second incidence surface adjacency, wherein, forming acute angle between first incidence surface and light emergence face joins, forming acute angle between second incidence surface and reflecting surface joins, when making light pass through light entrance structures thereof, point to light emergence face, reflecting surface by first and second incidence surface refraction, for improving light penetrates light guide plate by light emergence face luminescence efficiency.
2. according to the described high luminance light guide board of claim 1, it is characterized in that wherein, the angle between light and light emergence face, reflecting surface is 15 °～45 °;
The groove chamber is to be triangular shape at the section perpendicular to the light emergence face direction, making the inclined-plane of groove chamber neighborwise light entrance structures thereof side is first, inclined-plane away from the light entrance structures thereof side is second, pitch angle between first and reflecting surface is 30 °～45 °, reflecting surface plating reflectorized material forms reflectance coating, and reflectance coating covers the surface and the reflecting surface of groove chamber, for improving the light that penetrates light guide plate perpendicular to the briliancy on the light emergence face direction, and reduces the volume and the manufacturing cost of planar light source device.
3. according to the described high luminance light guide board of claim 2, it is characterized in that wherein, the pitch angle between first and reflecting surface is preferable with 42.5 °.
4. according to the described high luminance light guide board of claim 2, it is characterized in that wherein, the pitch angle between second of the groove chamber and reflecting surface is 45 °, for the fiduciary level that improves scattered reflection light and the easiness of processing.
5. according to claim 1 or 2 described high luminance light guide boards, it is characterized in that wherein, first and second incidence surface is to be the arc that is mutually symmetrical in the transversal section of light emergence face vertical direction.
6. according to the described high luminance light guide board of claim 5, it is characterized in that, wherein, the normal of first incidence surface and light emergence face abutting end and the angle between light emergence face are 20 °, first incidence surface is in the arc other end and the second incidence surface adjacency, and normal that it is terminal and the angle between light emergence face are 40 °, and first incidence surface is in the normal of arc mid point and the angle γ between light emergence face
2It is 30 °, for constituting light entrance structures thereof.
7. according to the described high luminance light guide board of claim 1, it is characterized in that wherein, this each incidence surface is the wavy surface that is made of most cambered surface tandem arrays respectively.
8. according to the described high luminance light guide board of claim 2, it is characterized in that, wherein, first and second face of groove chamber is respectively arc-shaped surface at the section that is parallel to the light emergence face direction, the center of circle of first and second face lays respectively at first and second face away from the light entrance structures thereof side, and first and second face is formed at respectively between its center of circle and the light entrance structures thereof, for improving luminescence efficiency and taste.
9. according to the described high luminance light guide board of claim 8, it is characterized in that wherein, first two ends tangent line angle to each other of groove chamber is 150 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101109783A CN101324681B (en) | 2007-06-12 | 2007-06-12 | High luminance light guide board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101109783A CN101324681B (en) | 2007-06-12 | 2007-06-12 | High luminance light guide board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101324681A true CN101324681A (en) | 2008-12-17 |
| CN101324681B CN101324681B (en) | 2010-09-29 |
Family
ID=40188293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101109783A Expired - Fee Related CN101324681B (en) | 2007-06-12 | 2007-06-12 | High luminance light guide board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101324681B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922660A (en) * | 2010-07-23 | 2010-12-22 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN102621624A (en) * | 2012-04-24 | 2012-08-01 | 丹阳博昱科技有限公司 | Light guide sheet including optical micro structure and making method |
| CN104216041A (en) * | 2013-05-31 | 2014-12-17 | 乐金显示有限公司 | Light guide plate having rounded polygon pattern and liquid crystal display device having thereof |
| CN105607179A (en) * | 2016-01-27 | 2016-05-25 | 青岛海信电器股份有限公司 | Display apparatus |
| CN111999794A (en) * | 2016-11-17 | 2020-11-27 | 松下知识产权经营株式会社 | Display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769922B1 (en) * | 2001-03-26 | 2007-10-24 | 삼성전자주식회사 | Backlight assembly and liquid crystal display device having the same |
| JP2003257229A (en) * | 2002-02-27 | 2003-09-12 | Alps Electric Co Ltd | Backlight, front light, and liquid crystal display device |
| CN100434988C (en) * | 2004-02-16 | 2008-11-19 | 西铁城电子股份有限公司 | Light guide plate |
-
2007
- 2007-06-12 CN CN2007101109783A patent/CN101324681B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922660A (en) * | 2010-07-23 | 2010-12-22 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN102621624A (en) * | 2012-04-24 | 2012-08-01 | 丹阳博昱科技有限公司 | Light guide sheet including optical micro structure and making method |
| WO2013159687A1 (en) * | 2012-04-24 | 2013-10-31 | 博昱科技（丹阳）有限公司 | Light guide sheet comprising optical micro structure and manufacturing method thereof |
| CN104216041A (en) * | 2013-05-31 | 2014-12-17 | 乐金显示有限公司 | Light guide plate having rounded polygon pattern and liquid crystal display device having thereof |
| CN104216041B (en) * | 2013-05-31 | 2017-07-07 | 乐金显示有限公司 | Light guide plate with fillet polygon pattern and the liquid crystal display device with it |
| US9817175B2 (en) | 2013-05-31 | 2017-11-14 | Lg Display Co., Ltd. | Light guide plate having rounded polygon pattern and liquid crystal display device having thereof |
| CN105607179A (en) * | 2016-01-27 | 2016-05-25 | 青岛海信电器股份有限公司 | Display apparatus |
| CN111999794A (en) * | 2016-11-17 | 2020-11-27 | 松下知识产权经营株式会社 | Display device |
| CN111999794B (en) * | 2016-11-17 | 2022-08-02 | 松下知识产权经营株式会社 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101324681B (en) | 2010-09-29 |
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