CN104728684A - Laser-line light source and liquid crystal display backlight - Google Patents
Laser-line light source and liquid crystal display backlight Download PDFInfo
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- CN104728684A CN104728684A CN201510194238.7A CN201510194238A CN104728684A CN 104728684 A CN104728684 A CN 104728684A CN 201510194238 A CN201510194238 A CN 201510194238A CN 104728684 A CN104728684 A CN 104728684A
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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
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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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
- 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
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
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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
- G02B6/0065—Manufacturing aspects; Material aspects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a laser-line light source which comprises a laser light source and a light guiding unit. The light guiding unit comprises a linear solid light guiding body, and an incident beam incomes from one end of the light guiding body and conducted on the other end face; one longer side face of the light guiding body is a light-emitting surface, and scattering light in the light guiding body is spilt from the light-emitting surface to form linearly; a reflecting position and a scattering position which are regionally mutual are arranged at the position corresponding to the light-emitting surface in the light guiding body along the light guiding direction, distribution density of the scattering position from an incident plane of the light guiding body to the other end face gradually changes from low to high, and distribution density of the corresponding reflecting position gradually changes from high to low, so that light intensity of the light-emitting surface is enabled to be even; the scattering position is a scattering netted dot when a light guiding stick is used; the reflecting position is a reflecting membrane when a dispersion optical fiber is used in the light guiding body. The invention further provides a lateral-incoming type and downright type liquid crystal display backlight. The laser-line light source and the backlight are simple in structures, small in manufacturing difficulty and evener in light intensity.
Description
Technical field
The present invention relates to LASER Light Source technical field, particularly a kind of laser line light source utilizing light guide structure, is specially adapted to liquid crystal display.The invention still further relates to the LCD backlight source using this laser line light source, comprise side entering type and direct-light-type backlight.
Background technology
Backlight is the vitals of liquid crystal display, because liquid crystal molecule itself is not luminous, so need extra equipment for it provides light source.The light source majority of current backlight is LED light source, is the structure of conventional side-edge type backlight as shown in Fig. 1 (a), has incident line source 1 at the side of light guide plate, and the coupling light of incident line source 1 is to forming surface light source in light guide plate 21; The below of light guide plate 21 is provided with reflecting layer 4, for reflect stray light, improves the utilization ratio of light; The top of light guide plate is provided with blooming 3, area source distribution of light can be made more even, and improve the utilization ratio of light; About line source 1, conventional LED light source at present, as shown in Fig. 1 (b), on a pcb board 11, the multiple LED 12 of the linear alignment forms line source, and pcb board 11 provides voltage and plays thermolysis.But, the scheme of the blue-ray LED collocation fluorescent material used at present and ejecting white light due to spectrum wider and cause the colour gamut of liquid crystal display lower.Even adopt RGB tri-coloured light LED, its colour gamut also cannot reach the colour gamut that laser display can represent.
Laser display is referred to as forth generation Display Technique due to its important breakthrough in colour gamut, and its colour gamut can reach the NTSC((U.S.) NTSC) 180%, considerably beyond the colour gamut of the display device of current main flow.The line source how spot light of Emission Lasers being converted into uniform intensity just become must faced by technical problem.Although the optical material of prior art can realize the diffusion of basic point-source light ray, light distribution is uneven; Such as Chinese patent CN101592821 proposes a kind of dispersion fiber that uses and conducts method spot light being become line source, but use dispersion fiber very strong in the side wall light emission light intensity near light source incidence end, but the light intensity the closer to rear end from side wall light emission is more weak, even if laser quasi is straightforward better also cannot avoid this problem, if according to the scheme that patent CN101592821 proposes, there will be the situation of light distribution inequality, cause the problem of the lack of homogeneity of backlight.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, the backlight source of liquid crystal display apparatus of laser line light source and this laser line light source of use is provided.
In order to solve the problems of the technologies described above, the technical scheme of laser line light source of the present invention is:
A kind of laser line light source, comprise LASER Light Source and light element, described light element comprises light conductor, and described light conductor is solid column optical material; It is incident from described light conductor one end that described LASER Light Source sends incident beam; Described light conductor comprises the plane of incidence and exiting surface, and the wherein said plane of incidence is light conductor one end face, and incident beam conducts to light conductor other end from the plane of incidence, and light conducting direction is identical with light conductor length direction; Described exiting surface is light conductor one long side surface, and light conductor inscattering light overflows from exiting surface and becomes linear outgoing; Surface outside the described light conductor plane of incidence and exiting surface is provided with reflecting layer, described reflecting layer and described light conductor one or discrete setting, by respective surfaces overflow light be reflected back light conductor; Described light conductor side is provided with reflection position and the scattering position of regional complementarity; Described reflection position and scattering position along the gradual change of light conducting direction density, scattering position from the light conductor plane of incidence to other end density from low to high, scattering position with exterior domain be reflection position, reflection position from the light conductor plane of incidence to other end density from high to low; Incident beam light occurs reflect and continue to conduct in light conductor when arriving reflection position, and when light arrives scattering position, scattering occurs, the scattered light of generation overflows from exiting surface part.
Preferably, described light conductor is lamp guide, and its long side direction is light conducting direction; Described reflecting layer is the reflectance coating being affixed on lamp guide surface; At least in the side relative with exiting surface, be provided with scattering netted dot, described scattering netted dot forms scattering position, and relative forms reflection position without dot area.Because comparatively strong near that one end light ratio of the plane of incidence, in order to make line source light intensity uniform, making should be larger apart from plane of incidence dot density far away, therefore can arrange that one end of the site plane of incidence close by dredging to other end arrangement, or ascending.
Preferably, described lamp guide cross section is rectangle, and lamp guide global shape is cuboid, and the plane of incidence is one of side, two ends, and exiting surface is one of the side at place, four long limits.
Preferably, described lamp guide is provided with scattering netted dot except in all the other sides of the plane of incidence and exiting surface.Site, except the offside being arranged on exiting surface, also can be arranged on other side.
Preferably, described scattering netted dot is hot roll extrusion site or injection moulding site.The lateral width arranging scattering netted dot due to lamp guide is relatively little, in order to make net-pont design have the larger free degree, should select the site that hot roll extrusion site and injection moulding site etc. are less.
Preferably, described incident beam front end arranges divergent lens or beam expanding lens.The beam quality of section laser is better, collimation is stronger, so form line source when incident light, perpendicular to light beam during lamp guide incident end face may transmit in lamp guide with form of straight lines, total reflection can not occur, add divergent lens in incident light front end, being coupled to lamp guide after making it form certain angle of divergence can address this problem; Section laser emergent light spot is less, and such light is not easy to incide on scattering netted dot in lamp guide, adds beam expanding lens to expand hot spot in incident light front end.
Preferred further, described incident beam is 10 ° to 120 ° through the angle of divergence after described divergent lens.
Preferably, there is the angle theta being less than 90 ° in the plane of incidence of described lamp guide and light conducting direction; The vertical described plane of incidence of incident beam.Because light beam incident direction and light conducting direction exist angle, be beneficial to and be totally reflected in lamp guide.
Preferred further, described lamp guide is lucite material, and the angle theta of the described plane of incidence and light conducting direction is 43 ° to 80 °.
Preferably, described light conductor is dispersion fiber, and it is axially light conducting direction; Described exiting surface is coated with discrete reflectance coating, and described discrete reflectance coating forms reflection position, and relative non reflecting film region forms scattering position.
Preferably, arrange reflectance coating to improve the utilization ratio of light around described dispersion fiber, described reflectance coating forms reflecting layer.
Preferably, the end face of described diffuse fiber except the plane of incidence and exiting surface and side surface all scribble reflectance coating, and described reflectance coating forms reflecting layer; Described side surface reflecting layer is arc-shaped, and its central angle is 192 ° to 240 °.
Preferably, described reflectance coating is total reflection film or semi-transparent semi-reflecting film.
A kind of LCD backlight source technical scheme of laser line light source that uses of the present invention is:
Employ a LCD backlight source for described laser line light source, comprise described laser line light source and light guide plate, be coupled to light guide plate from the light of laser line light source outgoing from light guide plate side; Emergent light is from light guide plate upper surface injection forming surface light source.This backlight is side-edge type backlight.
Preferably, be provided with scattering netted dot in described light guide plate, described scattering netted dot distribution density increases gradually with the distance with laser line light source.Similar in the design rule of scattering netted dot and lamp guide in light guide plate, less in the more sparse or site of the local net-pont design near light source, the comparatively dense of the local net-pont design away from light source or site larger.
The LCD backlight source technical scheme of the present invention's another kind use laser line light source is:
A kind of LCD backlight source employing described laser line light source, it is characterized in that: comprise some described laser line light sources, diffuser plate and blooming, some laser line light sources, at described diffuser plate arranged beneath, are coupled to diffuser plate from the light of laser line light source outgoing from diffuser plate lower surface; Emergent light self-diffusion plate upper surface injection and through forming surface light source after the blooming of top.This backlight is direct-light-type backlight.
Preferably, some described laser line light sources use a LASER Light Source, and LASER Light Source shoot laser bundle is divided into some bundles step by step by multiple semi-transparent semi-reflecting lens and a completely reflecting mirror, and beam splitting laser one_to_one corresponding is coupled in the light conductor of described laser line light source.
The present invention utilizes laser as back light, provides the laser line light source that structure is simple, manufacture difficulty is little and the LCD backlight source utilizing this line source to make; Compared with prior art, laser line light source of the present invention has more uniform light distribution, and the area source uniformity obtained is also better.
Accompanying drawing explanation
Fig. 1 (a) is prior art side-edge type backlight principle schematic;
The line source structural representation that Fig. 1 (b) uses for prior art side-edge type backlight;
Fig. 2 is the embodiment of the present invention 1 lamp guide principle schematic;
The schematic diagram of the technical problem that Fig. 3 (a) exists for embodiment 1 lamp guide;
Fig. 3 (b) increases the light-guide rod structure schematic diagram of lens for embodiment 2;
Fig. 4 is the light-guide rod structure schematic diagram that embodiment 3 arranges plane of incidence inclination angle;
Fig. 5 is the side-edge type backlight structural upright schematic diagram that embodiment 5 uses lamp guide;
Fig. 6 is the direct-light-type backlight principle schematic that embodiment 6 uses lamp guide;
Fig. 7 is embodiment 7 dispersion fiber perspective view;
Fig. 8 is embodiment 8 dispersion fiber structural representation.
Fig. 9 (a) uses the side-edge type backlight structural upright schematic diagram of dispersion fiber for embodiment 9;
Fig. 9 (b) is embodiment 9 side-edge type backlight principle schematic;
Figure 10 (a) uses the direct-light-type backlight principle schematic of dispersion fiber for embodiment 10;
Figure 10 (b) is laser coupled dispersion fiber structural representation in embodiment 10 direct-light-type backlight;
Wherein:
1. line source; 11.PCB plate; 12.LED lamp; 21. light guide plates; 22. diffuser plates; 3. blooming; 4. reflecting layer; 41,41 '. reflectance coating; 42. scattering netted dots; 5. lamp guide; 6. dispersion fiber; 7. incident beam; 71. coupling light; 72. emergent lights; 73. scattered lights; 74. total reflection lights; 81. divergent lenses; 82. total reflective mirrors; 83. semi-transparent semi-reflecting lens.
Detailed description of the invention
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described, to understand the present invention better.
Embodiment 1
Light conductor uses column lamp guide, as long as the optical material that the material of lamp guide is transparent, can use lucite (polymethyl methacrylate, PMMA) material.
As shown in Figure 2, the present embodiment uses the cuboid lamp guide that cross section is rectangle, and described lamp guide 5 has six faces, light conducting direction is along long side direction, one of them end side surface is the spot light plane of incidence, and a long side surface is exiting surface, and the emergent light of this exiting surface forms line source; Scattering netted dot 42 is provided with at the exit facet offside of lamp guide 5; Except exiting surface and incidence surface, reflectance coating is all posted in other faces.
Incident beam 7 incides in lamp guide 5 and is totally reflected, the anti-raw scattering when total reflection light 74 incides on scattering netted dot 42, and its total reflection condition is destroyed, so some scattered light 73 forms line source from the exiting surface side outgoing of lamp guide 5.
At the exiting surface offside of lamp guide 5, rationally scattering netted dot is set, just can forms the uniform line source of light distribution at exiting surface.Because that one end light ratio of the plane of incidence is comparatively strong, so the arrangement rule of scattering netted dot 42 is from that one end of the plane of incidence to the other end, its site arranging density is close by dredging, or dot area is ascending.The lateral width arranging scattering netted dot 42 due to lamp guide 5 is less, and in order to improve design freedom, scattering netted dot 42 should the site of selection of small, such as hot roll extrusion site, injection moulding site etc.
Embodiment 2
Because the beam quality of section laser is better, collimation is comparatively strong, so when incident beam 7 can not be totally reflected, as shown in Fig. 3 (a) perpendicular to light beam during lamp guide 5 plane of incidence may transmit in lamp guide 5 with form of straight lines.In order to solve the problem, can add optical mirror slip, such as divergent lens 81 in incident beam 7 front end, incident beam 7 produces certain dispersion angle through after divergent lens 81, and then is coupled in lamp guide 5, as shown in Fig. 3 (b).The angle of the described angle of divergence is 10 ° to 120 °.
Embodiment 3
In order to solve the problem described in embodiment 2, scheme shown in Fig. 4 can also be adopted.There is angle theta in lamp guide 5 plane of incidence and light conducting direction, this angle is acute angle; Incident beam 7 is relative to lamp guide 5 plane of incidence vertical incidence.When the material of lamp guide 5 is lucite, the scope of angle theta is 43 ° to 80 °.
Embodiment 4
Because section laser emergent light spot is less, the light after such incidence is not easy to incide on scattering netted dot in lamp guide 5.In order to obtain larger hot spot, incident beam 7 spot diameter can be expanded, mode similar to Example 2 can be used, place beam expanding lens in incident beam 7 front end with expanded light beam diameter.
Embodiment 5
The side entering type LCD backlight source using lamp guide as shown in Figure 5.Be the line source of uniform intensity distribution from lamp guide 5 exiting surface emergent light, be coupled into light guide plate 21 from a side of light guide plate 21; The bright dipping of light guide plate 21 upper surface, emergent light 72 forming surface light source.
For making area source light distribution even, also scattering netted dot is provided with in light guide plate 21, similar in the design rule of this site and lamp guide 5, more sparse or less at the position net-pont design near incident light source, at the comparatively dense of the position net-pont design away from light source or larger.In addition, due to the area of light guide plate 21, comparatively lamp guide 5 is large, so can use larger ink site, hot roll extrusion simultaneously, injection moulding site can use too.
Embodiment 6
The directly-down liquid crystal display backlight using multiple lamp guide as shown in Figure 6.Some laser line light sources that lamp guide 5 is formed as lamp source, are coupled into diffuser plate 22 from the linear beam of lamp guide 5 outgoing from diffuser plate 22 lower surface at diffuser plate 22 arranged beneath, and the effect of diffuser plate 22 is incident ray diffusion evenly; The outgoing of emergent light 72 self-diffusion plate 22 upper surface, then through forming surface light source after the two-layer blooming 3 of top.
Embodiment 7
The present embodiment is the technical scheme that light conductor adopts dispersion fiber, is illustrated in figure 7 the structure of dispersion fiber 6.Using a termination of dispersion fiber 6 as the plane of incidence, the arcuate flanks of side is as exiting surface, guide-lighting along shaft axis of optic fibre direction; Exiting surface posts discrete reflectance coating 41 along axis direction, post the region of reflectance coating for reflection position, the region of not pasting reflectance coating at interval is scattering position, and in dispersion fiber 6, light is reflected back light inside by reflecting position, by scattering position, scattering occurs, some scattered light 73 overflows exiting surface.
Because the light near incident beam 7 one end is comparatively strong, transmit then that light is more weak, be the uniform intensity ensureing line source, the density that the other end from one end of incident beam 7 incidence to dispersion fiber 6 arranges reflectance coating 41 reduces gradually more backward.Fraction light is only overflowed at dispersion fiber 6 leading portion, all the other light are reflected back toward in optical fiber and continue transmission to back segment, along with light intensity decreasing dispersion fiber 6 every section of scattering position becomes large, overflow more light, the distribution density of Reasonable adjustment reflectance coating 41 can make the exiting light beam intensity of leading portion and back segment basically identical.
In order to improve the utilization ratio of light, as shown in Fig. 9 (b), reflectance coating 41 can be set around dispersion fiber 6 as reflecting layer 4.
Embodiment 8
Also can arrange the reflecting layer being different from embodiment 7, as shown in Figure 8, dispersion fiber 6 all the other outer surfaces except the plane of incidence and exiting surface be sticked reflectance coating 41 ' as reflecting layer 4, the central angle being parallel to the arc surface reflecting layer of light conducting direction is 192 ° to 240 °.
Also can directly reflecting layer 4 be plated on dispersion fiber 6, can aluminize, silver or golden, also can be multilayer dielectricity reflecting layer.
Reflectance coating can select total reflection film or semi-transflective reflective film as required.
Reflectance coating is posted at the light output end of dispersion fiber.
Embodiment 9
It is the side-edge type backlight using dispersion fiber 6 as shown in Fig. 9 (a) He 9 (b).Dispersion fiber 6 is positioned at the side of light guide plate 21, is coupled to forming surface light source light guide plate 21 from the light of dispersion fiber 6 outgoing from the side of light guide plate 21.
Embodiment 10
It is the direct-light-type backlight using dispersion fiber 6 as shown in Figure 10 (a) He 10 (b).Some dispersion fibers 6 are arranged in below a diffuser plate 22, and diffuser plate 22 spreads upwards incident light, the outgoing of emergent light 72 self-diffusion plate 22 upper surface, then through forming surface light source after the two-layer blooming 3 of top.
The incident semi-transparent semi-reflecting lens 83 of incident beam 7 in Figure 10 (b), reflection optical coupler is incorporated into corresponding dispersion fiber 6, and the incident next semi-transparent semi-reflecting lens 83 of transmitted light, last transmitted light is coupled in dispersion fiber 6 after reflecting on a completely reflecting mirror 82.Single LASER Light Source can be divided into multiple line source like this.Use lamp guide 5 also can use above-mentioned beam-splitting method.
Should be understood that above-described embodiment only for technical conceive of the present invention and feature are described, its object is to understand content of the present invention for those skilled in the art and implement according to this, not detailed description of the invention is exhaustive, can not limit the scope of the invention with this.All technical schemes according to the present invention's invention are modified or equivalent replacement, and do not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in the middle of right of the present invention.
Claims (17)
1. a laser line light source, comprises LASER Light Source and light element, and described light element comprises light conductor, and described light conductor is solid column optical material; It is incident from described light conductor one end that described LASER Light Source sends incident beam (7), it is characterized in that:
Described light conductor comprises the plane of incidence and exiting surface, wherein
The described plane of incidence is light conductor one end face, and incident beam (7) conducts to light conductor other end from the plane of incidence, and light conducting direction is identical with light conductor length direction;
Described exiting surface is light conductor one long side surface, and light conductor inscattering light (73) overflows from exiting surface and becomes linear;
At described light conductor except other surface of the plane of incidence and exiting surface is provided with reflecting layer (4), described reflecting layer (4) and described light conductor one or discrete setting, be reflected back light conductor by the light overflowed from surface;
Described light conductor side is provided with reflection position and the scattering position of regional complementarity; Described reflection position and scattering position along the gradual change of light conducting direction density, scattering position from the light conductor plane of incidence to other end density from low to high, scattering position with exterior domain be reflection position, reflection position from the light conductor plane of incidence to other end density from high to low; Incident beam (7) light occurs reflect and continue to conduct in light conductor when arriving reflection position, and when light arrives scattering position, scattering occurs, the scattered light (73) of generation overflows from exiting surface part.
2. laser line light source according to claim 1, is characterized in that: described light conductor is lamp guide (5), and its long side direction is light conducting direction; Described reflecting layer (4) is for being affixed on the reflectance coating (41) on lamp guide (5) surface; At least in the side relative with exiting surface, be provided with scattering netted dot (42), described scattering netted dot (42) is scattering position, and the white space without site forms reflection position.
3. laser line light source according to claim 2, is characterized in that: described lamp guide (5) cross section is rectangle.
4. laser line light source according to claim 2, is characterized in that: described lamp guide (5), except the plane of incidence and exiting surface, is provided with scattering netted dot (42) in all the other sides.
5. the laser line light source according to any one of claim 2 to 4, is characterized in that: described scattering netted dot (42) is hot roll extrusion site or injection moulding site.
6. the laser line light source according to any one of claim 2 to 4, is characterized in that: described incident beam (7) front end arranges divergent lens (81) or beam expanding lens.
7. laser line light source according to claim 6, is characterized in that: described incident beam (7) is 10 ° to 120 ° through the dispersion angle scope after described divergent lens (81).
8. the laser line light source according to any one of claim 2 to 4, is characterized in that: the plane of incidence and the light conducting direction of described lamp guide (5) exist the angle theta being less than 90 °; The vertical described plane of incidence of incident beam (7).
9. laser line light source according to claim 8, is characterized in that: described lamp guide (5) is lucite material, and described angle theta angular range is 43 ° to 80 °.
10. laser line light source according to claim 1, is characterized in that: described light conductor is dispersion fiber (6), and it is axially light conducting direction; What described exiting surface was discrete is coated with reflectance coating (41), and described reflectance coating (41) forms reflection position, and relative non reflecting film region forms scattering position.
11. laser line light sources according to claim 10, is characterized in that: around described dispersion fiber (6), arrange reflectance coating (41) as reflecting layer (4).
12. laser line light sources according to claim 10, is characterized in that: described dispersion fiber (6) end face of surface except the plane of incidence and exiting surface and side surface all scribble reflectance coating (41) as reflecting layer (4); Described side surface reflecting layer (4) is arc surface, and its center of circle angular range is 192 ° to 240 °.
13., according to claim 10 to the laser line light source described in 12 any one, is characterized in that: described reflectance coating (41) is total reflection film or semi-transparent semi-reflecting film.
14. 1 kinds of LCD backlight sources employing the laser line light source described in any one of claim 1 to 13, it is characterized in that: comprise described laser line light source and light guide plate (21), be coupled to from the light of laser line light source outgoing from light guide plate (21) side light guide plate (21); Emergent light (72) is from light guide plate (21) upper surface injection forming surface light source.
15. LCD backlight sources according to claim 14, it is characterized in that: be provided with scattering netted dot (42) in described light guide plate (21), described scattering netted dot (42) distribution density increases gradually with the distance with laser line light source.
16. 1 kinds of LCD backlight sources employing the laser line light source described in any one of claim 1 to 13, it is characterized in that: comprise some described laser line light sources, diffuser plate (22) and blooming (3), some laser line light sources, at described diffuser plate (22) arranged beneath, are coupled to from the light of laser line light source outgoing from diffuser plate (22) lower surface diffuser plate (22); Emergent light (72) self-diffusion plate (22) upper surface injection through blooming (3) the forming surface light source afterwards of top.
17. LCD backlight sources according to claim 16, it is characterized in that: some described laser line light sources use a LASER Light Source, LASER Light Source shoot laser bundle is divided into some bundles step by step by multiple semi-transparent semi-reflecting lens (83) and a completely reflecting mirror (82), and beam splitting laser one_to_one corresponding is coupled in the light conductor of described laser line light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194238.7A CN104728684A (en) | 2015-04-22 | 2015-04-22 | Laser-line light source and liquid crystal display backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107957628A (en) * | 2016-10-18 | 2018-04-24 | 晨丰光电股份有限公司 | Light transmittance adjusting element |
| CN110645541A (en) * | 2018-06-27 | 2020-01-03 | 深圳市绎立锐光科技开发有限公司 | Light source device and vehicle lamp |
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Application publication date: 20150624 |