CN101246274B - Projection type area light source system - Google Patents
Projection type area light source system Download PDFInfo
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- CN101246274B CN101246274B CN2007100733144A CN200710073314A CN101246274B CN 101246274 B CN101246274 B CN 101246274B CN 2007100733144 A CN2007100733144 A CN 2007100733144A CN 200710073314 A CN200710073314 A CN 200710073314A CN 101246274 B CN101246274 B CN 101246274B
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- light source
- catoptron
- projection
- serrate
- source system
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Abstract
The invention provides a projection type surface light source and surface light source system, and the surface light source system includes: point light source, rectangle light tube which shapes the beam emitted from point light source, at least one of the first hackle speculums and one diffusing globe sheet, wherein, the beam emitted from point light source is shaped through homogenization and polarization by rectangle light tube, then the angle of beam is amplified by the first hackle speculum, and the beam projects to the diffusing globe sheet and is shaped to emit once again. The invention has the merits that: because the projection is carried on through reflection way, the light energy has high utilization efficiency; because of using the polarized beam output, the efficiency of light through liquid crystal is high; the collimating light outputs and emits, which makes the contrast increase; the spares are small, the point light source is easy to produce and simple to repair.
Description
[technical field]
The invention relates to light source field, especially a kind of surface light source system of projection.
[background technology]
The large-scale surface light source system of tradition roughly is divided into direct type system and ambient light origin system.Directly the type system is placed below the diffusion sheet by ten several linear light sources, although look shows slightly for making in this system on the screen intensity homogenising, but its disadvantage for example increases for power consumption, on the other hand, there is about one or two fluorescent tube to be arranged in its arbitrary end in the side light type system, is used for linear light sorurce change becoming planar light source.Thereby this system has reduced the quantity of fluorescent tube and has reduced power and reduce its light source thickness, yet, because light source arrangement in a side, therefore produces the problem of screen intensity inequality.
During panel, above-mentioned ambient light origin system needs in assembling: be used to accept light from fluorescent tube on the end face, after through it being changed into the optical plate of planar light source; Be used to make the diffuser plate of the light uniformization of planar light source; And be used to make light focusing to the panel to highlight and prismatic lens etc.Described in JP-A2000-147497, optical plate and these sheets are simply overlapping, in the method, because therefore the assembling complexity of panel needs to spend long time and cost higher.In addition because the low air layer of refractive index is present between the described layer, so the reflection of the light on the interface uprises, thereby cause the amount of projection light to reduce, the luminous power utilization factor is not high.
Moreover traditional linear light sources is mercurous; Environment is produced certain pollution.
[summary of the invention]
The objective of the invention is to pointolite is enlarged into large-scale planar light source and light-source system through lens combination and serrated face catoptron in minimum space.
To achieve these goals, the surface light source system of projection of the present invention, comprise: light source, rectangular tunnel with the beam shaping of light emitted, at least one first a serrate catoptron and a diffusing globe sheet, wherein, the light beam of described light emitted is through rectangular tunnel homogenising and polarization shaping, the angle of light beam is amplified in the back by the first serrate catoptron, also comprise one second serrate catoptron, be positioned at a side of the first serrate catoptron, enter the second serrate catoptron via the light beam of the first serrate mirror reflects, dwindle the light beam of wide-angle, be projected to the shaping of diffusing globe sheet at last and penetrate.Described light source can be pointolite.
Described sawtooth pattern catoptron comprises the serrated face that is distributed with the density distribution on basal plane and the basal plane.
Described serrated face presents plural number in contrast to this basal plane and distributes.
Described light source comprises ellipse reflex housing focused beam.
Described light source comprises parabolic reflex housing focused beam.
Also comprise a catoptron and projection lens group, the light folded optical path that described catoptron projects the projection lens group is perpendicular on the serrate catoptron, makes left side or the right side of projection lens group in serrate mirror surface direction.
Described diffusing globe sheet can be Fresnel lens.
Described light source can be LASER Light Source or LED source.
Advantage of the present invention is:
1. owing to carry out projection by the reflection mode, the utilization ratio height of its luminous energy;
2. owing to utilize the light output of polarization, efficient is higher during by liquid crystal;
3. the light of collimationization output projection makes contrast more increase;
4. part is few, uses pointolite, makes easily, and is easy to maintenance.
[description of drawings]
The present invention is further described below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the structural representation of first embodiment of the surface light source system of projection of the present invention.
Fig. 2 is the structural representation of second embodiment of the surface light source system of projection of the present invention.
Fig. 3 is the structural representation of the sawtooth pattern catoptron 13 of the area source of projection of the present invention.
Fig. 4 is the structural representation of the 3rd embodiment of the surface light source system of projection of the present invention.
Wherein, comprise light source 11, rectangular tunnel 12, serrate catoptron 13, diffuse reflector sheet 14, projection lens group 15, catoptron 16.
Wherein, described light source 11 with optical axis, rectangular tunnel 12, projection lens group 15 are arranged in a side (promptly catoptron 13 and the diffuse reflector sheet 14 as figure is positioned on the paper, is positioned at paper or paper is outer with light source 11, rectangular tunnel 12, the projection lens group 15 of optical axis) of serrate catoptron 13 and diffuse reflector sheet 14.
[embodiment]
Technology contents of the present invention, feature and reach effect cooperate below with reference to figure and corresponding preferred embodiment detailed description, can be known manifest.
The structural representation of first preferred embodiment of the area source of projection of the present invention, as shown in Figure 1: the area source of present embodiment projection comprises light source 11, rectangular tunnel 12, serrate catoptron 13 successively, and diffuse reflector sheet 14.Wherein, focus on the porch of rectangular tunnel 12 from light source 11 beam reflected through its ellipse reflex housing 111, this rectangular tunnel 12 is the homogenising rectangle with the light beam integer and converts the polarization light beam to, is projeced on the sawtooth pattern catoptron 13; This sawtooth pattern catoptron 13 amplifies the effect of light angle; And can in very short distance, project very big area, and project at last on the diffuse reflector sheet 14, do last angle integer by diffuse reflector sheet 14, be made into the light source of homogenising and collimation.
Wherein, described light source 11 can be pointolite.
As shown in Figure 2, in order to make its light path compact more, also comprise projection lens's group 15 and catoptron 16, use light folded optical path that a catoptron 16 projects projection lens group 15, make left side or the right side of projection lens group 15 in serrate catoptron 16 directions perpendicular on the serrate catoptron 13.
Wherein, the diffuse reflector sheet 14 in the foregoing description can be Fresnel lens.
Wherein, light source 11 can be LASER Light Source or LED source.
Wherein, described sawtooth pattern catoptron 13 as shown in Figure 3, described sawtooth pattern catoptron 13 comprises and is distributed with the serrated face 134 that density distributes on basal plane 133 and the basal plane.
Wherein, described serrated face 133 can be in contrast to this basal plane 134 and presents the plural number distribution.
Fig. 4 is the structural representation of the 3rd preferred embodiment of the area source of projection of the present invention, and as shown in Figure 4: the area source of present embodiment projection comprises light source 11, rectangular tunnel 12, the first serrate catoptron 131, the second serrate catoptron 132 and diffuse reflector sheet 14 successively.Wherein, focus on the porch of rectangular tunnel 12 through its ellipse reflex housing 111 from light source 11 beam reflected, this rectangular tunnel 12 is the homogenising rectangle with the light beam integer and converts the polarization light beam to, behind projection lens group 15 and catoptron 16 folded optical paths, be projeced on the first sawtooth pattern catoptron 131; The light angle that the first sawtooth pattern catoptron 131 amplifies above-mentioned light beam, and can in very short distance, project very big area, then see through second sawtooth catoptron 132, the light beam of above-mentioned wide-angle is dwindled, project at last on the diffuse reflector sheet 14, do last angle integer by diffuse reflector sheet 14, be made into the light beam of homogenising and collimation.
Described ellipse reflex housing 111 can be set to parabolic reflex housing focused beam and add focus lamp.
Wherein, described light source 11 can be pointolite.
Wherein, the sawtooth angle complementation of the described first sawtooth pattern catoptron 131 and the second serrate catoptron 132.
Wherein, the diffuse reflector sheet 14 in the foregoing description can be Fresnel lens.
Wherein, light source 11 can be LASER Light Source or LED source.
Advantage of the present invention is:
1. owing to carry out projection by the reflection mode, the utilization ratio height of its luminous energy;
2. owing to utilize the light beam output of polarization, efficient is higher when making light pass through liquid crystal;
3. the light of collimationization output projection is so that contrast more increases;
4. part is few, uses spot light, makes easily, and is easy to maintenance.
The above person only for most preferred embodiment of the present invention, is not be used to limiting the scope of the invention, and all equivalences of doing according to the present patent application claim change or modify, and are all the present invention and contain.
Claims (9)
1. the surface light source system of projection, comprise: light source, rectangular tunnel with the beam shaping of light emitted, at least one first a serrate catoptron and a diffusing globe sheet, wherein, the light beam of described light emitted is through rectangular tunnel homogenising and polarization shaping, the angle of light beam is amplified in the back by the first serrate catoptron, it is characterized in that: also comprise one second serrate catoptron, be positioned at a side of the first serrate catoptron, light beam via the first serrate mirror reflects enters the second serrate catoptron, dwindles the light beam of wide-angle, is projected to the shaping of diffusing globe sheet at last and penetrates.
2. the surface light source system of projection according to claim 1, it is characterized in that: described light source can be pointolite.
3. the surface light source system of projection according to claim 1 is characterized in that: described sawtooth pattern catoptron comprises and is distributed with the serrated face that density distributes on basal plane and the basal plane.
4. as the surface light source system of projection as described in the claim 3, it is characterized in that: described serrated face presents plural number in contrast to this basal plane and distributes.
5. the surface light source system of projection according to claim 1, it is characterized in that: described light source comprises ellipse reflex housing focused beam.
6. the surface light source system of projection according to claim 1, it is characterized in that: described light source comprises parabolic reflex housing focused beam.
7. as the surface light source system of projection as described in one of claim 1-6, it is characterized in that: also comprise a catoptron and projection lens group, the light folded optical path that described catoptron projects the projection lens group is perpendicular on the serrate catoptron, makes left side or the right side of projection lens group in serrate mirror surface direction.
8. as the surface light source system of projection as described in one of claim 1-6, it is characterized in that: described diffusing globe sheet can be Fresnel lens.
9. as the surface light source system of projection as described in one of claim 1-6, it is characterized in that: described light source can be LASER Light Source or LED source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100733144A CN101246274B (en) | 2007-02-15 | 2007-02-15 | Projection type area light source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100733144A CN101246274B (en) | 2007-02-15 | 2007-02-15 | Projection type area light source system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101246274A CN101246274A (en) | 2008-08-20 |
| CN101246274B true CN101246274B (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100733144A Active CN101246274B (en) | 2007-02-15 | 2007-02-15 | Projection type area light source system |
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| Country | Link |
|---|---|
| CN (1) | CN101246274B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659410A (en) * | 1993-12-28 | 1997-08-19 | Enplas Corporation | Surface light source device and liquid crystal display |
| CN1416016A (en) * | 2001-10-30 | 2003-05-07 | 奇美电子股份有限公司 | Declining lug structure on surface of reflector and its mfg method |
| CN1503038A (en) * | 2002-11-19 | 2004-06-09 | ������������ʽ���� | Illumination device and LCD device |
-
2007
- 2007-02-15 CN CN2007100733144A patent/CN101246274B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659410A (en) * | 1993-12-28 | 1997-08-19 | Enplas Corporation | Surface light source device and liquid crystal display |
| CN1416016A (en) * | 2001-10-30 | 2003-05-07 | 奇美电子股份有限公司 | Declining lug structure on surface of reflector and its mfg method |
| CN1503038A (en) * | 2002-11-19 | 2004-06-09 | ������������ʽ���� | Illumination device and LCD device |
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| Publication number | Publication date |
|---|---|
| CN101246274A (en) | 2008-08-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20081010 Address after: Two, 301, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Applicant after: Butterfly Technology (Shenzhen) Limited Address before: A-C District, No. 1, building 10, sparrows industrial village, Nanshan District, Shenzhen, Guangdong Applicant before: OMT Digital Display Technology (Shenzhen) Ltd. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Patentee after: Butterfly Technology (Shenzhen) Limited Address before: 518055, 301, two, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Patentee before: Butterfly Technology (Shenzhen) Limited |