CN101566306A - Focusing lens and illuminating apparatus - Google Patents
Focusing lens and illuminating apparatus Download PDFInfo
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- CN101566306A CN101566306A CNA2008100666820A CN200810066682A CN101566306A CN 101566306 A CN101566306 A CN 101566306A CN A2008100666820 A CNA2008100666820 A CN A2008100666820A CN 200810066682 A CN200810066682 A CN 200810066682A CN 101566306 A CN101566306 A CN 101566306A
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- condenser lens
- concentration type
- reflection concentration
- exit side
- type lens
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Abstract
The invention relates to a focusing lens and an illuminating apparatus adopting the same. The focusing lens is provided with a plurality of prisms through a light emergence end face of the prior reflection focusing lens so as to lead a circular light spot emerged from the reflection focusing lens to be compressed into a rectangle light spot. The illuminating apparatus outputs a rectangle light spot with good alignment, which is used for matching with a rectangle imaging liquid crystal panel in an illuminating projection system and illuminating lights are all basically utilized, thereby avoiding the loss of the edge part of the illuminating lights. The image display of the crystal projection system applied with the illuminating apparatus is improved.
Description
Technical field
The lighting device that the present invention relates to a kind of condenser lens and use this condenser lens to carry out the optically focused shaping, this lighting device can be applicable in the optical projection system.
Background technology
LED application as lighting source in liquid crystal projector is very extensive at present, LED also must be used concentrating element to improve light efficiency as lighting source, the concentrating element that is used for led light source is mainly and contains paraboloidal reflector or reflection concentration type lens, the light exit side face of this reflector or reflection concentration type lens is generally circle, promptly the hot spot from their outgoing is a circular light spot, and the imaging liquid crystal panel in the liquid crystal projector is square (comprising rectangle), the screen of display image also is square, the circular light spot that obvious light source assembly sends can not all apply to the liquid crystal panel that throws light on, the edge light of circular light spot will lose, the light utilization efficiency that is lighting source is lower, and the circular light spot defective that square liquid crystal panel is easy to generate of throwing light on is: there is the dark space corner of the image that shows on the screen, and this has influenced the Projection Display quality.
The existing method that addresses the above problem is that the light exit side face with the reflection concentration type lens also is designed to square, but this is than traditional curved face reflecting type collector lens, it is very irregular that its shape will become, this design has obviously increased the optical design difficulty, and angry its mould also becomes complicated, has improved cost.
Summary of the invention
Purpose of the present invention promptly is in order to overcome above-mentioned all defect, the lighting device of a kind of condenser lens and this condenser lens of employing is provided, this condenser lens is to increase to use several prisms on the architecture basics of existing reflection concentration type lens, structure is simpler, the good square focus spot of this lighting device output collimation, and can satisfy of the requirement of imaging liquid crystal panel, adopt the light utilization efficiency of LCD projecting system of this lighting device very high, effectively improve the Projection Display quality the incident of illumination light low-angle.
Purpose of the present invention is achieved through the following technical solutions:
A kind of condenser lens comprises the reflection concentration type lens, and the light exit side circumferential distribution of these reflection concentration type lens has several prisms that the hot spot from the outgoing of reflection concentration type lens are compressed into rectangular light spot.
On the said structure basis, wherein:
Described number of prisms is at least four.
Described number of prisms is four, and two the one group light exit side both sides that are symmetrically distributed in the reflection concentration type lens.
The cross section of described prism is a parallelogram, and two prisms in each group are adjacent and be combined into " V " type.
The light exit side face of described reflection concentration type lens is circular, the closed quadrangle of the light exit side face of perhaps described reflection concentration type lens for being constituted or all be made of camber line by camber line and straight line.
The length-width ratio of described rectangular light spot is 4: 3 or 16: 9.
Described reflection concentration type lens are quadratic surface reflection concentration type lens.
The light exit side centre of described reflection concentration type lens convexes to form local focus lamp.
The light exit side end face of described prism is inclined-plane or curved surface.
Described prism is glued on the light exit side face of reflection concentration type lens, perhaps by using an outsourcing housing that described reflection concentration type lens and prism are bundled together, so that described prism is fixed on the light exit side face of reflection concentration type lens.
The technical scheme that the lighting device that the present invention provides simultaneously adopts is:
A kind of lighting device comprises led light source, also comprises being used for this led light source is carried out the above condenser lens of optically focused shaping.
Wherein, offer shrinkage pool in the bottom of condenser lens, described led light source is installed in this shrinkage pool.
The end face of an end that is positioned at condenser lens inside of described shrinkage pool is a curved surface.
Adopt technical scheme of the present invention, the beneficial effect of generation is:
This condenser lens is good to the light source spotlight effect, the good rectangular light spot of lighting device output collimation, be used for mating the rectangle liquid crystal panel in the illumination optical projection system, condenser lens satisfies the requirement of liquid crystal panel illumination beam low-angle incident to the compression effectiveness of light beam.
Topmost, when this lighting device is used for LCD projecting system, the rectangular light beam of its output can all be utilized by liquid crystal panel basically, has farthest reduced the loss of illuminating bundle marginal portion, and the image display brightness of this LCD projecting system significantly improves.
In addition, condenser lens provided by the invention only is at the light exit side face that has the reflection concentration type lens now several prisms to be set, and has just obtained higher light utilization efficiency, and it is very low to improve cost.
Description of drawings
Fig. 1 is the perspective view of condenser lens preferred embodiment one of the present invention.
Fig. 2 is the perspective view of condenser lens preferred embodiment two of the present invention.
Fig. 3 is the front schematic view of a kind of embodiment of described condenser lens (reach scheme corresponding visual angle therewith by rotary-focusing lens entity).
Fig. 4 is the front schematic view of the another kind of embodiment of described condenser lens (reach scheme corresponding visual angle therewith by rotary-focusing lens entity).
Fig. 5 is schematic diagram that adopts the lighting device of condenser lens described in Fig. 4 and the light path schematic diagram that this lighting device is used for LCD projecting system.
Fig. 6 is with the light path schematic diagram of this lighting device in LCD projecting system under the front schematic view behind the lighting device half-twist among Fig. 5 and this visual angle.
Fig. 7 is the condenser lens of another kind of embodiment and the structural representation and the light path schematic diagram of lighting device.
Fig. 8 is one of hot spot effect schematic diagram of lighting device output of the present invention.
Fig. 9 be lighting device of the present invention output hot spot effect schematic diagram two.
Figure 10 be lighting device of the present invention output hot spot effect schematic diagram three.
The specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 and Fig. 2, a kind of condenser lens 1 comprises reflection concentration type lens 2, in the light exit side circumferential distribution of these reflection concentration type lens 2 several prisms 3 that the hot spot from 2 outgoing of reflection concentration type lens are compressed into rectangular light spot is arranged.These reflection concentration type lens 2 can be traditional reflection concentration type lens, its exiting surface is circular flat end, see shown in Figure 3ly, obviously the hot spot from these reflection concentration type lens 2 outgoing is a circular light spot, and several prisms 3 just are used for this circular light spot is compressed into rectangular light spot.
The number of described prism 3 is at least four, and preferred embodiment sees shown in Figure 1, at the light exit side periphery of reflection concentration type lens 2 four prisms 3 is set altogether, and per two the one group light exit side both sides that are symmetrically distributed in reflection concentration type lens 2.The cross section of wherein said prism 3 is a parallelogram, and two prisms 3 in each group are adjacent and be combined into " V " type.
Prism 3 numbers on this condenser lens 1 can also be six, eight, in the other both sides increase of the light exit side face of reflection concentration type lens 2 shown in Figure 1 prism 3 are set and get final product.Preferred embodiment two is seen shown in Figure 2, the number of prism 3 is eight, be evenly distributed on around the light exit side of reflection concentration type lens 2, promptly on the architecture basics of condenser lens 1 shown in Figure 1, increase respectively in the other both sides of light exit side face of reflection concentration type lens 2 two prisms 3 are set.Just can be compressed into rectangular light spot than standard from the hot spot of these reflection concentration type lens 2 outgoing like this, the spotlight effect of this condenser lens 1 is good, and edge light is all gathered to spot center.By the shape size and the number of design prism 3, can realize that from the length-width ratio of the rectangular light spot of this condenser lens 1 last outgoing be 4: 3 or 16: 9.
The reflection concentration type lens 2 preferable structure embodiments that comprise in the described condenser lens 1 are: these reflection concentration type lens 2 are quadratic surface reflection concentration type lens, specifically can be parabolic reflector formula collector lens.Wherein see shown in Figure 4ly, convex to form local focus lamp 4 in the light exit side centre of these reflection concentration type lens 2, this focus lamp 4 is used for improving spotlight effect, can improve light efficiency.Unrestrictedly in addition be, the light exit side end face of these reflection concentration type lens 2 can be circular (output circular light spot), also can be the closed quadrangle (exporting non-standard circular light spot) that is made of camber line and straight line (totally four) or is made of four camber lines.
The main mode that described several prisms 3 are arranged on the reflection concentration type lens 2 light exit side peripheries is: the one, prism 3 is fixed on the light exit side periphery of reflection concentration type lens 2 by the mode of gluing together; The 2nd, by using an outsourcing housing (not shown in the accompanying drawing) described reflection concentration type lens 2 and prism 3 are bundled together, prism 3 is fixed on the light exit side face of reflection concentration type lens 2; Perhaps these several prisms 3 are integrated with reflection concentration type lens 2.
Please refer to Fig. 5, the present invention provides a kind of lighting device simultaneously, comprises led light source 7 and above-described condenser lens 1, and this condenser lens 1 is used for to the 7 optically focused shapings of this led light source.Wherein, the bottom of described condenser lens 1 offers shrinkage pool 5 (see figure 4)s, and just shrinkage pool 5 is offered in the bottom of reflection concentration type lens 2, and described led light source 7 is installed in this shrinkage pool 5.Improvements are further, and the end face of an end that is arranged in condenser lens 1 inside of this shrinkage pool 5 is curved surface 6 (sees Fig. 4 dotted line shown in), and this curved surface 6 can play converging action to the light that led light source 7 sends.
The light path that this lighting device is used for LCD projecting system also is demonstrated in Fig. 5, is compressed by prism 3 from the hot spot of reflection concentration type lens outgoing, then through penetrating on liquid crystal panel 9 behind polarization conversion/light-dividing device 8.Wherein the light exit side end face 30 of prism 3 is inclined-plane or curved surface among this Fig. 5, and the light beam that is used for making the edge is towards the bending of spot center direction, to strengthen spotlight effect.
The good rectangular light spot of this lighting device output collimation, it is used for mating the liquid crystal panel 9 of rectangle of throwing light on, and light utilization efficiency is very high, and the compression effectiveness of 1 pair of light beam of condenser lens satisfies the requirement of liquid crystal panel 9 illumination beam low-angle incidents.
Please refer to Fig. 6, this figure is with the light path schematic diagram of this lighting device in LCD projecting system under the front schematic view behind the lighting device half-twist among Fig. 5 and this visual angle.In this orientation, the beam center part that led light source 7 sends in the lighting device is dispersed behind prism 3, and collimation output then can obtain uniformity and well collimate hot spot, irradiating liquid crystal panel 9.
Fig. 7 is on the basis of Fig. 6, the lighting device schematic diagram of another kind of embodiment and this lighting device light path schematic diagram in LCD projecting system.Different with Fig. 6 is, each prism 3 is combined by two parallelogram prisms among this Fig. 7, after the central light beam that led light source 7 sends is injected this prism 3, through the output of two secondary reflections, disperses better effects if, and the uniformity of the light beam of output is better.
Please refer to Fig. 8, Fig. 9 and Figure 10, it shows the hot spot effect of lighting device output of the present invention.Led light source 7 sends the hot spot that light exports and is generally circular light spot in the lighting device behind reflection concentration type lens 2, be compressed into rectangular light spot 10 through prism 3 then, the light that is the fill area, both sides 11 (marginal portion of original hot spot) of circle among Fig. 8 is compressed into rectangular area 10, and edge light has obtained utilization.
In Fig. 9, if the hot spot of circular size shown in reflection concentration type lens 2 output maps, and the viewing area of liquid crystal panel 9 size is 10 sizes of rectangular area shown in the figure, obviously can produce four dark picture areas 12, and use the prism 3 on the condenser lens 1 of the present invention marginal portion 11 compressions of circular light spot can be entered rectangular area 10, simultaneously also segment beam can be injected four corner areas, to eliminate this four dark picture areas 12.
See shown in Figure 10, if the light exit side end face of reflection concentration type lens 2 closed quadrangle (non-standard circle) for constituting by camber line and straight line (totally four) or constituting by four camber lines, then the hot spot from these reflection concentration type lens 2 outputs is non-standard circle, by prism 3 (this kind situation preferably adopts the embodiment shown in Fig. 2) is set around the light exit side of these reflection concentration type lens 2, this non-standard circular light spot is compressed into rectangular light spot 10, and promptly four part edge light 11 of this non-standard circular light spot are compressed in the rectangular area 10.
When lighting device of the present invention was used for LCD projecting system, the rectangular light spot of its output can all be utilized by liquid crystal panel 9 basically, has farthest reduced the loss of illuminating bundle marginal portion, and the image display brightness of LCD projecting system is significantly improved.
Though only adopted several embodiment to describe the present invention; but embodiments of the present invention are not to be subjected to above content constraints; structure of the present invention also can have multiple variation, and those do not break away from any modification or partial replacement of spirit of the present invention, and it all should be encompassed in the middle of protection scope of the present invention.
Claims (15)
1, a kind of condenser lens comprises the reflection concentration type lens, it is characterized in that: the light exit side circumferential distribution of these reflection concentration type lens has several prisms that the hot spot from the outgoing of reflection concentration type lens are compressed into rectangular light spot.
2, a kind of condenser lens according to claim 1 is characterized in that: described number of prisms is at least four.
3, a kind of condenser lens according to claim 1 is characterized in that: described number of prisms is four, and two the one group light exit side both sides that are symmetrically distributed in the reflection concentration type lens.
4, a kind of condenser lens according to claim 3 is characterized in that: the cross section of described prism is a parallelogram, and two prisms in each group are adjacent and be combined into " V " type.
5, a kind of condenser lens according to claim 1 is characterized in that: the light exit side face of described reflection concentration type lens is for circular.
6, a kind of condenser lens according to claim 1 is characterized in that: the closed quadrangle of the light exit side face of described reflection concentration type lens for being constituted or all be made of camber line by camber line and straight line.
7, a kind of condenser lens according to claim 1 is characterized in that: the length-width ratio of described rectangular light spot is 4: 3 or 16: 9.
8, a kind of condenser lens according to claim 1 is characterized in that: described reflection concentration type lens are quadratic surface reflection concentration type lens.
9, a kind of condenser lens according to claim 1 is characterized in that: the light exit side centre of described reflection concentration type lens convexes to form local focus lamp.
10, a kind of condenser lens according to claim 1 is characterized in that: the light exit side end face of described prism is inclined-plane or curved surface.
11, a kind of condenser lens according to claim 1 is characterized in that: described prism is glued on the light exit side face of reflection concentration type lens.
12, a kind of condenser lens according to claim 1 is characterized in that: by an outsourcing housing described reflection concentration type lens and prism are bundled together, so that described prism is fixed on the light exit side face of reflection concentration type lens.
13, a kind of lighting device comprises led light source, it is characterized in that: also comprise be used for to this led light source carry out the optically focused shaping as any described condenser lens in the claim 1 to 12.
14, a kind of lighting device according to claim 13, it is characterized in that: the bottom of described condenser lens offers shrinkage pool, and described led light source is installed in this shrinkage pool.
15, a kind of lighting device according to claim 14 is characterized in that: the end face of an end that is positioned at condenser lens inside of described shrinkage pool is a curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100666820A CN101566306A (en) | 2008-04-25 | 2008-04-25 | Focusing lens and illuminating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100666820A CN101566306A (en) | 2008-04-25 | 2008-04-25 | Focusing lens and illuminating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101566306A true CN101566306A (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100666820A Pending CN101566306A (en) | 2008-04-25 | 2008-04-25 | Focusing lens and illuminating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101566306A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423703A (en) * | 2013-09-03 | 2013-12-04 | 成都欧盛光电科技有限公司 | High beam light lens and dipped headlight lens of motorcycle |
| CN104062694A (en) * | 2014-07-16 | 2014-09-24 | 常州工学院 | Anti-dazzle illuminating lens |
| CN112540499A (en) * | 2019-09-20 | 2021-03-23 | 精工爱普生株式会社 | Projector with a light source |
| CN116877947A (en) * | 2023-09-07 | 2023-10-13 | 常州星宇车灯股份有限公司 | Light emitting device, optical system and car lamp for realizing function multiplexing |
-
2008
- 2008-04-25 CN CNA2008100666820A patent/CN101566306A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423703A (en) * | 2013-09-03 | 2013-12-04 | 成都欧盛光电科技有限公司 | High beam light lens and dipped headlight lens of motorcycle |
| CN103423703B (en) * | 2013-09-03 | 2015-09-02 | 成都欧盛光电科技有限公司 | Motorcycle high beam lens and dipped headlight lens |
| CN104062694A (en) * | 2014-07-16 | 2014-09-24 | 常州工学院 | Anti-dazzle illuminating lens |
| CN104062694B (en) * | 2014-07-16 | 2016-03-16 | 常州工学院 | A kind of anti-dazzle illuminating lens |
| CN112540499A (en) * | 2019-09-20 | 2021-03-23 | 精工爱普生株式会社 | Projector with a light source |
| CN116877947A (en) * | 2023-09-07 | 2023-10-13 | 常州星宇车灯股份有限公司 | Light emitting device, optical system and car lamp for realizing function multiplexing |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20091028 |