CN1549047A - Integrator and projector using the same principle - Google Patents
Integrator and projector using the same principle Download PDFInfo
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- CN1549047A CN1549047A CNA031116647A CN03111664A CN1549047A CN 1549047 A CN1549047 A CN 1549047A CN A031116647 A CNA031116647 A CN A031116647A CN 03111664 A CN03111664 A CN 03111664A CN 1549047 A CN1549047 A CN 1549047A
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Abstract
The integrator has one opening for light from outer lamp to project, reflecting element and phase changing element successively formed in the area outside the opening; one polarizing part to change the incident light to the opening into outgoing specific polarized light; and light recycling part to recycle incident light in specific space until polarized outgoing. The present invention is used to replace available traditional optical elements for homogenizing and polarizing light and can reuse the light during color separation and color screen rolling process, so that the projector can reproduce high-brightness image.
Description
Technical field
The present invention relates to integrator (integrator) and utilize the projector (projector) of this circuit, especially about using projection on the light optics instrument of projector with integrator and utilize an invention of the projector of this principle.
Background technology
At present, show (display) device not only to lighting, lightening development, and, also to big picture trend development.Especially, the exploitation and the multimedia development of big picture display device become a very important problem just jointly, and up to now, projector is exactly in these big picture display devices that developed.
Big picture display device-projector like this will can be divided into two kinds of CRT projector and LCD projector according to display element.Wherein the LCD projector can small-sizedly be made, and is therefore, particularly noticeable at present.
Fig. 1 has shown the structural drawing of traditional one-board LCD projector synoptically.
Can learn that with reference to Fig. 1 traditional one-board projector is made up of following components: the electroluminescent lamp (110) that promptly generates light; The parabolic mirror (120) that the light of generation is advanced by parallel direction; Will be through parabolic mirror (120) and the light of advancing carries out the fly's eye camera lens array (130) of homogenization; The polarisation transformation element (140) of the polarisation of light characteristic that conversion is injected from fly's eye camera lens array (130); To be divided into R, G, B light by the light that polarisation transformation element (140) are injected and carry out the colored roll screen device (150) of roll screen (scrolling); And corresponding image signals, optionally modulate R, G, B light, and in the spatial light modulator (160: hereinafter to be referred as ' photomodulator ') of spatial reproduction specific image.
For conventional projector, to advance with quasi-parallel light according to parabolic mirror (120) by the light that electroluminescent lamp (110) generates, and form homogenization through fly's eye camera lens array (130) as shown in Figure 2, also, have specific polarization characteristic through as shown in Figure 3 polarisation transformation element (140).Fig. 2 is the picture figure of the traditional fly's eye camera lens array principle of work of explanation, and Fig. 3 then is the picture figure of the principle of work of the traditional polarisation transformation element of explanation.
Can learn with reference to Fig. 2, a plurality of fly's eye camera lenses that fly's eye camera lens array (130) tool has plenty of same outward appearance and form are arranged in a structure that is listed as, and, each fly's eye camera lens will be accepted the matter light beam such as non-of advancing through parabolic mirror (120), and make these light beams, thereby in this repeat region (A of Fig. 2), form impartial light beam field separately to other position irradiations.
On the one hand, can learn that with reference to Fig. 3 polarisation transformation element (140) is made of the λ that incident light is separated into P ripple and S wave polarization beam splitter (Polarizing Beam Splitter: hereinafter to be referred as ' PBS ') group (141) and conversion polarisation of light characteristic/2 polarization plates (142).Form homogenization light through fly's eye camera lens array (130) and spatiality ground and will organize (141) according to PBS and be separated into P ripple and S ripple, and the P ripple will be transformed to the S ripple according to λ/2 polarization plates (142) that are attached to PBS group (141) back side.Thus, polarisation transformation element (140) can guarantee equably that just the light of exporting has polarization characteristic.
But, with regard to conventional projector, it exists following problem: the light of soon being injected by electroluminescent lamp (110) carries out homogenization, and carry out polarization for light with homogenization, use the high price optical elements as fly's eye camera lens array (130) and polarisation transformation element (140), so just improved its manufacturing expense; Owing to used a plurality of optical elements, therefore just produced the difficulty of aspect, location (alignment), and increased the volume of optical instrument.
Especially, for traditional one-board or double-plate projector, in the white light of the R, the G that inject by polarisation transformation element (140), B composition, the main colored roll screen device-colored character wheel (150) that uses will be through the light of some compositions, remaining light is then reflected, come to separate R, G, B color with this by the time, and each R, the G that will separate, B color carry out roll screen in order, and then make it to embody, but, in color-separated process and colored roll screen process, the light that will reflect does not recover and the method utilized again.Therefore, as shown in Figure 4, when using the colored character wheel (150) that constitutes through wave filter by R, G, B, in color-separated process and colored roll screen process, can lose about incident light of about 2/3 at most.
Summary of the invention
The object of the present invention is to provide the stronger integrator of a kind of utilization factor of light and utilize the projector of this principle, it can overcome shortcoming of the prior art, carry out light homogenization process and polarisation transformation process with an optical elements, can reduce the volume of optical instrument thus, also help the location (alignment) between the optical elements, and the light that can disappear to actual can not the utilization in color-separated process and colored roll screen process utilizes again.
The object of the present invention is achieved like this: integrator is made up of following components, the i.e. opening that can inject the light that generates by outside electroluminescent lamp (lamp), in the specific region outside the opening, lamination forms the peristome of reflection element and phase tranformation element in order; From the light of injecting by peristome, only penetrate certain line polarization polarisation of light portion to the outside; In particular space, the light of injecting by peristome is carried out recycle, up to its light recirculation portion by being provided with till polarization portion penetrates.
For peristome, be characterized in that opening is the reflectivity opening; The reflection element is inner front-reflection or catoptron; The phase tranformation element then is λ/4 polarization plates.
And the characteristics of polarization portion are: it comprises 1st, 2nd polarization plates of formation reflection-type P/S wavelength-division from method.At this moment, the 1st polarization plates is positioned on the light path of peristome and the 2nd polarization plates, and is 45 ° interior angle with the 2nd polarization plates, and this set method is ideal.
At this moment, the light recirculation portion can be formed the common right angle cylinder (hallow cylinder) or mirror type glass measuring staff (the mirrored glass rod) formation of reflecting surface by the specific region on inner surface.
On the one hand, in order to achieve the above object, projector can be made up of following components, promptly generates the electroluminescent lamp of white light; White light is carried out the elliptical reflector of light harvesting; The roll screen portion of the light of incident being cut apart and carrying out colored roll screen with R, G, B light; Light from the elliptical reflector light harvesting is carried out injecting roll screen portion after the polarization, at this moment, the light of reflection is carried out recycle, and reenter the integrator that is mapped to roll screen portion; And the spatial light modulator of R, G, B light optionally being modulated and formed in the space image.
Here, for the opening of electroluminescent lamp and integrator, its optimal position should be on ellipse the 1st, the 2nd focus of the hypothesis that defines according to the prolongation elliptical reflector.
In sum, according to the integrator of this invention and to utilize the projector of this principle be the process of carrying out light homogenization process and polarisation transformation with a kind of optical elements, thus, can reduce the whole volume of projector, and solve calibration (alignment) problem between the optical elements (especially light homogenization element and polarisation transformation element).
And this integrator is in color separation process of being undertaken by colored roll screen device and colored roll screen process, and the part light that uses can recover in fact to fail, enable to utilize again, therefore, improve the utilization factor of light, utilized its projector can also reproduce high-brghtness picture images.
Description of drawings
Fig. 1 has shown the structural drawing of traditional one-board LCD projector synoptically.
Fig. 2 is the picture figure of the traditional fly's eye camera lens array principle of work of explanation.
Fig. 3 is the picture figure of the principle of work of the traditional polarisation transformation element of explanation.
Fig. 4 is the picture figure that shows the colored character wheel of general colored roll screen device.
Fig. 5 is the picture figure that shows integrator example of the present invention.
Fig. 6 is the picture figure that shows another integrator example of the present invention.
Fig. 7 is the picture figure of polarisation transformation process in the integrator that shows as shown in Figure 5.
Fig. 8 has shown the structural drawing according to the projector of another example of the present invention.
Fig. 9 is the picture figure of the colored magnetic drum of key diagram 8.
Figure 10 a and Figure 10 b are the picture figure of light rejuvenation in the projector of another example among the present invention.
110... electroluminescent lamp (lamp) 120... parabolic mirror
130... fly's eye camera lens array (fly lenz array)
140... the colored roll screen device of polarisation transformation element 150...
160... spatial light modulator 141...PBS group
142... λ/2 polarization plates 510,610, the 831... reflecting surface
520,620... opening pole plate 521,832a... opening
522,832b... front-reflection minute surface 523,832c... λ/4 polarization plates
530,630,833... the 1st polarization plates 540,640,834... the 2nd polarization plates
810... electroluminescent lamp 820... elliptical reflector
830... the colored magnetic drum of integrator 840...
850... spatial light modulator
Embodiment
Below, with reference to accompanying drawing, the present invention will be further described in detail.
Fig. 5 is the picture figure that shows according to the integrator of this invention, and Fig. 6 then is the picture figure that shows according to another integrator example of this invention.
Can learn with reference to Fig. 5, with regard to integrator, form a reflecting surface (510) at the inside surface of the hollow structure thing of inner vacancy; Hollow structure thing one end adheres to an opening pole plate (520) that forms opening (521); The other end then is provided with the 1st polarization plates (530) of separating the P/S ripple obliquely.Also have and the 1st polarization plates (530) has on the position of specific interior angle and is provided with the 2nd polarization plates (540).
Opening (521) is a reflectivity opening, therefore, it can see through the light of injecting from the outside, still, the light of injecting from integrator inside is then reflected, prevent the light of injecting by opening (521) with this and pass through the phenomenon that opening (521) penetrates to the outside again.
For the 1st polarization plates (530) and the 2nd polarization plates (540), they preferably are about 45 ° interior angle, the reflecting surface (510) that is formed at the 1st polarization plates (530) back side direction can directly be formed at the back side of the 1st polarization plates (630) then as shown in Figure 6.
Again can learn with reference to Fig. 5, reflecting surface (510) is in particular space, the light of injecting by opening (521) is circulated, a kind of means of till being exported, carrying out by the 2nd polarization plates (540), here, it adheres to front mirror at the common structure inside surface with four jiaos of sections and constitutes (hallow type); It also can be formed at circle or the above polygon of quadrangle, for example on the common structure inside surface of 8 dihedrals, 12 angle sections; When utilizing the front-reflection effect, its structure can also substitute (solid type) with glass bar (bar).
On opening pole plate (520), in the zone except opening (521), formed front-reflection minute surface (522), λ/4 polarization plates (523) have then been formed at its top.
1st, the 2nd polarization plates (530) (540) is the means that the no polarized light of injecting by opening (521) is carried out the light conversion with specific polarization, the 1st polarization plates (530) the reflection S glistening light of waves, and for the P glistening light of waves, the reflection P/S wavelength-division that use is seen through is from means; The 2nd polarization plates (540) is the reflected P ripple then, and for the S ripple, the reflection P/S wavelength-division that use is seen through is from means.For the means, can use PBS or PBS beam to separate or the reflection polarization plates for reflection P/S wavelength-division here.
Integrator with said structure will be carried out following three processes.Promptly the matter light of injecting by opening (521) such as non-is carried out the light homogenization process of homogenization and output by the space; To be transformed to the polarisation transformation process of specific polarization state and output by the no polarized light that opening (521) are injected; And the light of getting back to integrator inside by the 2nd polarization plates (540) is carried out recycle (recycle), the light of exporting again by the 2nd polarization plates (540) recovers (recapturing) process again.Light rejuvenation will with colored magnetic drum and the so colored roll screen device interlock of colored character wheel, therefore, be particularly useful for using the one-board or the double-plate projector of colored roll screen device.
At first, light homogenization process is described.
By opening (521) inject only separately with a plurality of light shafts of different light paths, there is very big difference each other in the path of above-mentioned light, even if overlapping these light shafts can not obtain the homogenization streamer.Promptly in the space of opticpath unanimity, its optical density is big; In inconsistent space, its optical density is then little.But, for integrator, provide light round-robin reflecting surface (510) shape long, on the contrary, zone-Di 2 polarization plates (540) shape of output light is then smaller.Integrator with this structure is incited somebody to action the light path of the light of restricted passage the 2nd polarization plates (540) output greatly, and the result will reduce the light path difference of each light.Therefore, on specific locus, by the light of the 2nd polarization plates (540) output, its light path is with overlapped and become homogenization.
Secondly, with reference to Fig. 7, describe as follows to the polarisation transformation process.Here, Fig. 7 is the picture figure of polarisation transformation process in the integrator that shows as shown in Figure 5.
Inject the angle by the light that opening (521) is injected according to it, will be through reflecting surface (510) or direct projection to the 1 polarization plates (530), and, on one side through the 1st polarization plates (530), then be separated into P ripple and S ripple on one side and carry out with different light path separately.
At this moment, S polarized light in the 1st polarization plates (530) reflection will penetrate to the outside through the 2nd polarization plates (540), but, the P polarized light that sees through the 1st polarization plates (530) will be through the reflecting surface (510) that is positioned at the back side, after inciding the 1st polarization plates (530) again, arrive λ/4 polarization plates (523) that are positioned at its opposing face.
The P polarized light when seeing through λ/4 polarization plates (523), its phase tranformation λ/4 degree, and see through λ/4 polarization plates (523) again, its phase place λ/4 degree of also remapping by the front-reflection minute surface (522) of its below.Thus, the phase place that is injected into the P polarized light of λ/4 polarization plates (523) at first finally is to penetrate after conversion λ/2 degree.Be that initial P polarized light will become the ejaculation of S polarized light.
Then, the S polarized light penetrates to the outside by the 2nd polarization plates (540) after the 1st polarization plates (530) reflection of its opposing face again.
This shows that integrator will be to carrying out conversion and output by most of light of injecting after the light recycle (recycle) with specific polarized light, therefore, in the polarisation transformation process, the loss meeting of light seldom.
Below, light rejuvenation is described.
Fig. 8 has shown the structural drawing according to the projector of another example of this invention.
Can learn that with reference to Fig. 8 projector is made of following components.Promptly generate the electroluminescent lamp (810) of white light; The light that is generated by electroluminescent lamp (810) is reflected and carries out to ad-hoc location the elliptical reflector (820) of light harvesting; The roll screen portion (840) of the light of injecting being cut apart and carrying out colored roll screen with R, G, B light; Light from elliptical reflector (820) light harvesting is carried out injecting to roll screen portion (840) after the polarization, at this moment, the light of reflection is carried out recycle, and be injected into the integrator (830) of roll screen portion (840) again; And corresponding image signals, R, G, B light are optionally modulated and are formed in the space spatial light modulator (850 :) of image hereinafter to be referred as ' photomodulator '.
Electroluminescent lamp (810) is positioned on the 1st focus of the hypothesis ellipse that defines according to the reflecting surface that prolongs elliptical reflector (820), and the opening of integrator (830) then is positioned on the 2nd oval focus of hypothesis.Then, the light that is generated by electroluminescent lamp (810) will reflect and concentrate on the 2nd focus from elliptical reflector (820), and promptly on the opening of integrator (830), and the light of light harvesting is injected to integration (830) inside by opening.
As shown in Figure 9, colored magnetic drum (840) has the face that sees through of drum shape, and the face of seeing through has then carried out dichromatism and covered processing, enables optionally to see through R, G, B light.And seeing through mask has following structure, promptly from the light of injecting, only see through R, G that R or G or B become beam split, B wave filter storage unit (840a) (840b) (840c) alternately arranging mutually.This colored magnetic drum (840) rotates by certain speed according to rotating driving device, and white light resolved into R, G, B light by the regular hour, the R of cutting apart, G, B light shine in order, it is a colored roll screen device that embodies color with said method, and can be with other general colored roll screen device, for example colored character wheel (color wheel) etc. substitutes.Here, Fig. 9 is the picture figure of the colored magnetic drum of key diagram 8.
Photomodulator (850) is an optical system that combines camera lens array (851), PBS (852), liquid crystal panel (853) and projecting mirror head unit (854).The picture signal of its corresponding liquid crystal panel (853), to regulate by each R, G, B light transmission amount that colored magnetic drum (840) separated by the time, generate the image of specific image with this, and will this image be enlarged by projecting mirror head unit (854).
Below, with reference to Fig. 8 to Figure 11, the projector principle of work is described.Figure 10 and Figure 11 are according to this invention, and the picture figure of light rejuvenation in the projector of another example is described.
The white light that is generated by electroluminescent lamp (810) carries out light harvesting after elliptical reflector (820) is gone up reflection, in the time of then by integration (830), become specific polarized light, and each the wave filter storage unit (840a) that is injected into colored magnetic drum (840) is (840b) in (840c).
For each wave filter storage unit (840a) (840b) (840c), from the light of injecting, it only will satisfy the light that correlation filter sees through condition and deliver in the light dispenser (850),, the residue light that satisfies the condition of seeing through to failing then feeds back to integrator (830) again.
For example, if the white polarized light by integrator (830) output has been injected in the R wave filter storage unit (840a), in the R, the G that constitute white polarized light, B light, R light will be transmitted to light dispenser (850), remaining G, B light can be in R wave filter storage unit (840a) reflected back integrator (830).
Afterwards, G, B light can carry out recycle in integrator (830), be injected into again in each wave filter storage unit of colored magnetic drum (840) by the 2nd polarization plates (834) then, but, if at this moment G, B light have been injected in the G wave filter storage unit (840b), G light can be transmitted to light dispenser (850), and remaining B light then will reflect in G wave filter storage unit (840b), turns back to again and also carries out said process in the integrator (830) repeatedly.
As a result, the polarized light that penetrates at integrator (830) will be through light rejuvenation at first, and almost major part all can be passed through colored magnetic drum (840), and therefore, in color-separated process and colored roll screen process by colored magnetic drum (840), the loss of light will be seldom.
Afterwards, by colored magnetic drum (840), R, G, the B light cut apart by timeliness will be injected among the PBS (852) through camera lens array (851), and PBS (852) will and liquid crystal panel (852) form interlock, and embody the coloured image of corresponding image signals.And this image can pass through projecting mirror head unit (854), enlarges on screen and its image of final decision.
More than Chen Shu example carries out for this example is described, by above-mentioned explanation, if the professional person, you will learn so, in the scope that does not break away from the technology of the present invention thought, and corrections such as can carrying out numerous variations, improvement, substitute and add.The technical scope of this invention will be decided according to following additional patent claim.
Claims (12)
1, integrator and utilize the projector of this principle is characterized in that said integrator has an opening of injecting the light that is generated by outside electroluminescent lamp, and in the specific region outside the opening, lamination forms the peristome of reflection element and phase tranformation element in order;
From the light of injecting by peristome, only penetrate certain line polarization polarisation of light portion to the outside;
In particular space, the light of injecting by peristome is carried out recycle, the light recirculation portion that till penetrating, is provided with by polarization portion.
2, according to the said integrator of claim 1 and utilize the projector of this principle, the opening that it is characterized in that peristome is the reflectivity opening.
3, according to the said integrator of claim 1 and utilize the projector of this principle, the reflection element that it is characterized in that peristome is inner front-reflection or catoptron.
4, according to the said integrator of claim 1 and utilize the projector of this principle, the phase tranformation element that it is characterized in that peristome is λ/4 polarization plates.
5,, it is characterized in that polarization portion comprises the 1st, the 2nd polarization plates that is made of from means reflection P/S wavelength-division according to the said integrator of claim 1 and utilize the projector of this principle.
6,, it is characterized in that the 1st polarization plates is positioned on the light path of peristome and the 2nd polarization plates, and be arranged to be 45 ° of interior angles with the 2nd polarization plates according to the said integrator of claim 5 and utilize the projector of this principle.
7,, it is characterized in that the light recirculation portion is the common right angle cylinder (hallow cylinder) that forms reflecting surface at the specific area on inner surface according to the said integrator of claim 1 and utilize the projector of this principle.
8,, it is characterized in that the light recirculation portion is mirror type glass measuring staff (mirrored glass rod) according to the said integrator of claim 1 and utilize the projector of this principle.
9, integrator and utilize the projector of this principle is characterized in that its projector comprises:
Generate the electroluminescent lamp of white light;
White light is carried out the elliptical reflector of light harvesting;
The roll screen portion of the light of injecting being cut apart and carrying out colored roll screen with R, G, B light;
Light from the elliptical reflector light harvesting is carried out after the polarization, and portion injects to roll screen, at this moment, the light of reflection is carried out recycle, and be injected into the integrator of roll screen portion again;
And the spatial light modulator of R, G, B light optionally being modulated and formed in the space image.
10,, it is characterized in that the integrator of this projector comprises according to the said integrator of claim 9 and utilize the projector of this principle:
An opening of injecting the light that is generated by electroluminescent lamp is arranged, in the specific region outside the opening, form the peristome of reflection element and phase tranformation element in order;
From the light of injecting by peristome, only penetrate certain line polarization polarisation of light portion to the outside;
And in particular space, the light of injecting by peristome is carried out recycle, the light recirculation portion that till penetrating, is provided with by polarization portion.
11,, it is characterized in that electroluminescent lamp and opening are positioned on the 1st, the 2nd focus of the hypothesis ellipse that prolongs elliptical reflector and define according to the said integrator of claim 10 and utilize the projector of this principle.
12, according to the said integrator of claim 9 and utilize the projector of this principle, the roll screen portion that it is characterized in that this projector is colored magnetic drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031116647A CN1549047A (en) | 2003-05-15 | 2003-05-15 | Integrator and projector using the same principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031116647A CN1549047A (en) | 2003-05-15 | 2003-05-15 | Integrator and projector using the same principle |
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| Publication Number | Publication Date |
|---|---|
| CN1549047A true CN1549047A (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031116647A Pending CN1549047A (en) | 2003-05-15 | 2003-05-15 | Integrator and projector using the same principle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7369736B2 (en) | 2003-10-17 | 2008-05-06 | Samsung Electronics Co., Ltd. | Light tunnel, uniform light illuminating device and projector employing the same |
| US7665849B2 (en) | 2005-07-19 | 2010-02-23 | Hitachi, Ltd. | Color separating unit and projection type video display apparatus provided with the same |
| CN102116934A (en) * | 2011-03-21 | 2011-07-06 | 天津大学 | Method for designing reflection-type optical integrator based on parabolic mirror array |
| CN102122070A (en) * | 2011-03-21 | 2011-07-13 | 天津大学 | Design method of reflective optical integrator based on planar mirror array |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
| WO2022227802A1 (en) * | 2021-04-29 | 2022-11-03 | 华为技术有限公司 | Beam processing apparatus and beam processing method |
-
2003
- 2003-05-15 CN CNA031116647A patent/CN1549047A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7369736B2 (en) | 2003-10-17 | 2008-05-06 | Samsung Electronics Co., Ltd. | Light tunnel, uniform light illuminating device and projector employing the same |
| CN100412685C (en) * | 2003-10-17 | 2008-08-20 | 三星电子株式会社 | Light tunnel, uniform light illuminating device and projector employing the same |
| US7665849B2 (en) | 2005-07-19 | 2010-02-23 | Hitachi, Ltd. | Color separating unit and projection type video display apparatus provided with the same |
| CN102116934A (en) * | 2011-03-21 | 2011-07-06 | 天津大学 | Method for designing reflection-type optical integrator based on parabolic mirror array |
| CN102122070A (en) * | 2011-03-21 | 2011-07-13 | 天津大学 | Design method of reflective optical integrator based on planar mirror array |
| CN102116934B (en) * | 2011-03-21 | 2012-09-19 | 天津大学 | Method for designing reflection-type optical integrator based on parabolic mirror array |
| CN102122070B (en) * | 2011-03-21 | 2013-08-28 | 天津大学 | Design method of reflective optical integrator based on planar mirror array |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
| WO2022227802A1 (en) * | 2021-04-29 | 2022-11-03 | 华为技术有限公司 | Beam processing apparatus and beam processing method |
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