CN103528023B - A kind of design of high light utilization efficiency light pipe - Google Patents
A kind of design of high light utilization efficiency light pipe Download PDFInfo
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- CN103528023B CN103528023B CN201310490997.9A CN201310490997A CN103528023B CN 103528023 B CN103528023 B CN 103528023B CN 201310490997 A CN201310490997 A CN 201310490997A CN 103528023 B CN103528023 B CN 103528023B
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Abstract
The invention discloses a kind of design of high light utilization efficiency light pipe, primarily of key light pipe, multiple branched pipes, collect light pipe and plus lens composition.The light that light source sends is pooled to key light pipe by branched pipe, then is irradiated to after convergent lens on DMD, after being collected, gets back to again in key light pipe by collecting light pipe by the unnecessary light that digital micro-mirror " OFF state " reflects by concentrator.Condition satisfied when determining to collect the maximum collection rate of light pipe by calculating.The beneficial effect of present design is: 1. meet institute can reach best collection efficiency to the collection light pipe of condition, improve light utilization efficiency, reduce the heat of system, extend system lifetim, more economically practicality; 2. many branched pipes can meet multiple light source and transmit simultaneously, better mate with LED light source; 3. with optical adhesive, plus lens and key light pipe are bonded together, reduce the loss of light in transmitting procedure.
Description
Technical field
The present invention generally relates to light pipe, and particularly relates to a kind of light pipe with the high-light-energy utilization rate of branched structure.
Background technology
Light pipe is widely used projecting apparatus, in the various electronic product such as scanner.
Digital light process (DigitalLightProcessing) optical projection system, is called for short DLP optical projection system, adopts digital light treatment technology, has fine definition, image seamless, economy advantages of higher, become the optical projection system of main flow on market.The core parts of digital light processing projection system are digital micromirror elements (DigitalMicromirrorDevice), referred to as DMD.It is integrated with millions of micro mirrors on a single die, by microprocessor control, under the effect of electronic switch, each micro mirror can be turned to forward, reverse two positions by independent high frequency, the time that microcontroller keeps after controlling the upset of each micro mirror by pulse width size, screen produces the grey scale image of different brightness.
In traditional digital light processing projection system, light is transmitted by light pipe, and light pipe has the effect of uniform beam, can ensure that the light be irradiated on DMD is uniform light.When the micro mirror on DMD is in forward, i.e. " ON state ", light is reflected on projection screen; But when the micro mirror on DMD is in reverse, i.e. " OFF state ", light just can not arrive projection screen, and this part light is unnecessary, this part light absorbs by the general absorber that adopts.The shortcoming done like this has two: one to be that this part light has been wasted, and light utilization efficiency is low; Two is can produce heat after unnecessary light is absorbed by absorber, is unfavorable for that entire system is dispelled the heat.Light source in conventional projection system generally adopts single light source luminous, but along with technology constantly progress, LED light source is little with its volume, life-span length, environmental protection and energy saving, design freedom are large etc., and advantage progressively replaces traditional light source.Due to LED mono-luminous flux deficiency, often adopt plurality of LEDs light source to meet the luminous flux requirement of system, so traditional light pipe just cannot mate with LED light source.So in traditional digital light processing projection system, multiple light courcess can be met in the urgent need to one and conduct simultaneously, the light pipe that the undesired light that DMD can be reflected again is recycled.
Existing technology can not realize above function, if application number is " 201020126921.X ", name is called the Chinese patent of " a kind of glass-mirror light guide pipe ", a kind of light pipe of high-performance low cost is proposed, but this light pipe can only realize the straight line conduction of single light source light, multiple light courcess can not be realized and conduct simultaneously and collect the unnecessary light of DMD reflection.
Application number is " 01252803.X ", name is called the Chinese patent of " guiding device ", and application number is " 200420095017.1 ", name is called the Chinese patent of " light pipe ", the light pipe of a kind of arc and bending is proposed respectively, although they can realize the change of single light source radiation direction, the light that single light source sends can only be conducted, multiple light courcess can not be realized and conduct simultaneously and collect the unnecessary light of DMD reflection.
Application number is " 200910300907.9 ", the Chinese patent that name is called " light pipe and guiding device ", proposes the light pipe with a bright dipping end and multiple branched pipe, can realize multiple light source and transmit simultaneously; Application number is " 201110107888.5 ", the Chinese patent that name is called " single LED two light pipe ", proposes light beam that single light source sends and assigns in multiple light pipe and go.Two kinds of above-mentioned methods all cannot realize the recycling to DMD reflection ray.
In the above-described techniques, the first light pipe can only realize the conduction of single light source straight line, and the scope of application is too narrow; The second and the third light pipe achieve the change in light conduction direction, but can not meet the system of LED as light source; 4th kind of light pipe achieves multiple light courcess and conducts simultaneously, and the 5th kind of light pipe achieves single light source shunting conduction, but for having the system of digital micromirror elements, they all can not recycle the unnecessary light of digital micro-mirror reflection, and light utilization efficiency is low.Therefore in the optical system that there is light pipe and digital micromirror elements in digital light processing projection system and other, multiple light courcess can be realized in the urgent need to one and transmit simultaneously, the light pipe unnecessary light that digital micromirror elements reflects can recycled again.
Summary of the invention
In order to solve above-mentioned technical barrier, the invention provides a kind of design of high light utilization efficiency light pipe.
The present invention solves the problems referred to above by following proposal:
A kind of design of high light utilization efficiency light pipe is primarily of key light pipe, multiple branched pipes, collect light pipe and plus lens composition, the light that light source sends is pooled to key light pipe by branched pipe, be irradiated to after convergent lens again in digital micromirror elements, after being collected by concentrator by the unnecessary light that digital micro-mirror " OFF state " reflects, get back in supervisor's light again by collecting pipe, collect light pipe to be made up of four parts: with the coupling part of key light pipe, arch section, straight portion and compound parabolic concentrator, condition satisfied when determining to collect the maximum collection rate of light pipe by calculating,
Collect light pipe four partial common same optical axises;
The critical angle that total reflection occurs light pipe is
, key light pipe with the angle collecting light pipe coupling part is
, the radian of arch section is
, the maximum collection angle of compound parabolic concentrator is
, the angle of straight line portion and horizontal plane is
, all angles all use Rad;
Collect the condition that light pipe meets:
;
Collect the radian of light pipe arch section
meet:
;
The condition that the maximum collection angle of compound parabolic concentrator meets:
;
The collection surface of compound parabolic concentrator faces the light reflected by digital micro-mirror " OFF state ";
Collecting the quantity of light pipe can be one, also can make multiple, and concrete quantity is determined by the size of digital micromirror elements and quantity;
The number of branched pipe is determined by the quantity of light source and total light flux;
Plus lens and the effective optical adhesive of key light are bonded together.
Compared with prior art, beneficial effect is present design: 1. the collection light pipe meeting above-mentioned condition can reach best collection efficiency, improves light utilization efficiency, reduces the heat of system, extends system lifetim, practical more economically; 2. many branched pipes can meet multiple light source and transmit simultaneously, better mate with LED light source; 3. with optical adhesive, plus lens and key light pipe are bonded together, reduce the loss of light in transmitting procedure.
Accompanying drawing explanation
Fig. 1 is overall light path schematic diagram.
Fig. 2 is the schematic diagram of compound parabolic concentrator.
Fig. 3 is the schematic diagram that compound parabolic concentrator collects light.
Fig. 4 collects the schematic diagram that light pipe collects light.
Fig. 5 collects another schematic diagram that light pipe collects light.
Fig. 6 collects light pipe arch section schematic diagram.
Fig. 7 is the schematic diagram of plus lens.
1. branched pipes in figure, 2. key light pipe, 3. optical axis, 4. collect light pipe and key light pipe jointing part divides, the 5. arch section of collecting pipe, 6. collect the straight portion of light pipe, 7. compound parabolic concentrator, 8. plus lens, 9. micro mirror, 10. micro mirror initial position, 11. planes of incidence, 12 exit facets, 13. normals.
Detailed description of the invention
Specific embodiments is told about below in conjunction with accompanying drawing and example.
With reference to Fig. 1, in the present embodiment, the light having three LED light sources to send converges through three branched pipes laggardly becomes owner of light pipe, and after the even light of key light pipe, emergent ray is irradiated in digital micromirror elements by plus lens.Micro mirror+12 degree and-12 degree two positions overturn fast, when micro mirror be turned to+12 spend time, light is reflected to above projection screen; When micro mirror be turned to-12 spend time, light is reflected on compound parabolic concentrator, and ray-collecting gets up by concentrator, light by collect light pipe come back in key light pipe, light completes and recycles.
In concrete enforcement, adopt the digital micromirror elements of other angles to be also fine, the flip angle of such as micro mirror is ± 10 degree.
Fig. 2 is the schematic diagram of compound parabolic concentrator.Compound parabolic concentrator (CompoundParabolicConcentrator), being called for short CPC, is a kind of non-imaging concentrator according to edge optical principle design, and incident light arrives receiving surface by reflection in CPC, reach theoretical maximum focusing ratio, performance is in close proximity to desirable concentrator.Plane of incidence radius is a, and exit facet radius is b, so the maximum collection angle of CPC
meet:
.If the angle of incident ray and optical axis is greater than
, light will be reflected back by CPC, can not be collected; If the angle of incident ray and optical axis is less than
, light can be collected by CPC.The angle of light and optical axis is larger, and the uniformity being collected light is lower, so the collection surface of compound parabolic concentrator should be faced the light reflected by digital micro-mirror " OFF state ", ensures that the uniformity being collected light is high like this.
With reference to Fig. 3, in the present embodiment, a light, on CPC, is the maximum collection angle of CPC with the angle of optical axis
, light is just in time collected, and enters in light pipe after primary event, and the angle of light and light pipe optical axis is also
.The condition that this light can transmit in light pipe is totally reflected in light pipe, namely
, the condition that namely the maximum collection angle of concentrator will meet is:
Fig. 4 collects the schematic diagram that light pipe collects light.Light pipe has the character not changing incident ray and optical axis included angle, and as Fig. 4, the angle that incident ray is in optical axis at light inlet is
, light, after the transmission of light pipe, at the angle of light-emitting window and optical axis is still
.
With reference to Fig. 5, in the present embodiment, collect light pipe to be made up of four parts: with the coupling part of key light pipe, arch section, straight portion and compound parabolic concentrator.The critical angle that total reflection occurs light pipe is
, key light pipe with the angle collecting light pipe coupling part is
, the radian of arch section is
, the maximum collection angle of compound parabolic concentrator is
, the angle of straight line portion and horizontal plane is
.The angle of Ray Of Light and optical axis is the maximum collection angle of concentrator
, just collected by concentrator, enter in light pipe, light pipe itself has the character not changing light and optical axis included angle, namely with
enter light pipe, also with
go out light pipe.If this light collected can be utilized, so require that it enters in key light pipe and want to be totally reflected.The incidence angle of light in key light pipe is greater than critical angle
, namely in triangle ABC,
be greater than
, namely
.
So the condition that collection light pipe will meet is:
.
Fig. 6 collects light pipe arch section schematic diagram.Wherein
,
.So radian of arch section
.The radian collecting light pipe arch section as can be seen here by
with
common decision, the less light loss of radian is fewer, under the prerequisite ensureing collection efficiency, increases
or reduce
light loss can be reduced.
Fig. 7 is the schematic diagram of plus lens.Plus lens optical adhesive sticks on key light pipe, reduces the loss of light in communication process.
Above-described embodiment is illustrative principle of the present invention and effect only; and the embodiment of part, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (1)
1. one kind high light utilization efficiency light pipe, this light pipe is primarily of key light pipe, multiple branched pipes, collect light pipe and plus lens composition, the light that light source sends is pooled to key light pipe by branched pipe, be irradiated to after convergent lens again in digital micromirror elements, after being collected by concentrator by the unnecessary light that digital micro-mirror " OFF state " reflects, conduction through collecting light pipe is got back in supervisor's light again, collect light pipe to be made up of four parts: with the coupling part of key light pipe, arch section, straight portion and compound parabolic concentrator, condition satisfied when determining to collect the maximum collection rate of light pipe by calculating, it is characterized in that:
Collect light pipe four partial common same optical axises;
The critical angle that total reflection occurs light pipe is θ
0, key light pipe is θ with the angle of collection light pipe coupling part
1, the radian of arch section is θ
2,the maximum collection angle of compound parabolic concentrator is θ
max, the angle of straight portion and horizontal plane is θ
3, all angles all use Rad;
Collect the condition that light pipe meets:
Collect the radian θ of light pipe arch section
2meet: θ
2=π-θ
1+ θ
3;
The condition that the maximum collection angle of compound parabolic concentrator meets:
The collection surface of compound parabolic concentrator faces the light reflected by digital micro-mirror " OFF state ";
It is one or more for collecting the quantity of light pipe, and concrete quantity is determined by the size of digital micromirror elements and quantity;
The number of branched pipe is determined by the quantity of light source and total light flux;
Plus lens and the effective optical adhesive of key light are bonded together.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490997.9A CN103528023B (en) | 2013-10-20 | 2013-10-20 | A kind of design of high light utilization efficiency light pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490997.9A CN103528023B (en) | 2013-10-20 | 2013-10-20 | A kind of design of high light utilization efficiency light pipe |
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| Publication Number | Publication Date |
|---|---|
| CN103528023A CN103528023A (en) | 2014-01-22 |
| CN103528023B true CN103528023B (en) | 2015-11-18 |
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|---|---|---|---|
| CN201310490997.9A Expired - Fee Related CN103528023B (en) | 2013-10-20 | 2013-10-20 | A kind of design of high light utilization efficiency light pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3054020A1 (en) * | 2016-07-13 | 2018-01-19 | Valeo Vision | DIGITAL SCREEN LIGHT BEAM PROJECTION DEVICE AND PROJECTOR PROVIDED WITH SUCH A DEVICE |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169847A (en) * | 2018-03-13 | 2018-06-15 | 杭州艾芯智能科技有限公司 | A kind of large field of view scan imaging optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498618Y (en) * | 2001-07-24 | 2002-07-03 | 深圳市中兴通讯股份有限公司上海第二研究所 | Light conduction device |
| CN2756950Y (en) * | 2004-11-06 | 2006-02-08 | 鸿富锦精密工业（深圳）有限公司 | Light conductive pipe |
| EP1918773A1 (en) * | 2001-04-25 | 2008-05-07 | Wavien, Inc. | Light recovery for projection displays |
| CN101839446A (en) * | 2009-03-17 | 2010-09-22 | 鸿富锦精密工业（深圳）有限公司 | Light-guiding pipe and light-guiding device |
| CN102705767A (en) * | 2012-06-01 | 2012-10-03 | 安徽师范大学 | Design scheme of self-adaptive headlamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7787170B2 (en) * | 2004-06-15 | 2010-08-31 | Texas Instruments Incorporated | Micromirror array assembly with in-array pillars |
-
2013
- 2013-10-20 CN CN201310490997.9A patent/CN103528023B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1918773A1 (en) * | 2001-04-25 | 2008-05-07 | Wavien, Inc. | Light recovery for projection displays |
| CN2498618Y (en) * | 2001-07-24 | 2002-07-03 | 深圳市中兴通讯股份有限公司上海第二研究所 | Light conduction device |
| CN2756950Y (en) * | 2004-11-06 | 2006-02-08 | 鸿富锦精密工业（深圳）有限公司 | Light conductive pipe |
| CN101839446A (en) * | 2009-03-17 | 2010-09-22 | 鸿富锦精密工业（深圳）有限公司 | Light-guiding pipe and light-guiding device |
| CN102705767A (en) * | 2012-06-01 | 2012-10-03 | 安徽师范大学 | Design scheme of self-adaptive headlamp |
Non-Patent Citations (1)
| Title |
|---|
| 数字微镜元件式自适应前照灯光学设计;武汉，等;《红外与激光工程》;20130430;第42卷(第4期);全文 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3054020A1 (en) * | 2016-07-13 | 2018-01-19 | Valeo Vision | DIGITAL SCREEN LIGHT BEAM PROJECTION DEVICE AND PROJECTOR PROVIDED WITH SUCH A DEVICE |
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| CN103528023A (en) | 2014-01-22 |
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