CN1916693A - Optical engine for reflection type silicon based tiny display of liquid crystal - Google Patents
Optical engine for reflection type silicon based tiny display of liquid crystal Download PDFInfo
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- CN1916693A CN1916693A CN 200610019365 CN200610019365A CN1916693A CN 1916693 A CN1916693 A CN 1916693A CN 200610019365 CN200610019365 CN 200610019365 CN 200610019365 A CN200610019365 A CN 200610019365A CN 1916693 A CN1916693 A CN 1916693A
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Abstract
A micro display optical engine of reflection and silicon-based liquid crystal type consists of light source, polarizer, light focusing and illuminating component, the first and the second color selection filtering and polarizing conversion plate, polarization dividing/combining mirror, compensation glass plate, two-color dividing /combining mirror with substrate glass plate and film as well as protective glass plate, wideband lambada/ 4 wave plate with green and red as well as blue wave plate, silicon based liquid crystal chip, analyzer and projection lens. It can be used to form 12 group and 24 types of optical engines by utilizing above said device and components.
Description
Technical field
The invention provides a kind of optical engine for reflection type silicon based tiny display of liquid crystal, exactly, it is a kind of for realizing red (R), green (G), the light path complete equipilibrium of blue (B) three road imaging passages in the glass medium, can realize the best correction of aberration, and the horizontal image drift that three road imaging passages produce on imaging surface is synchronous fully, thereby guarantee red (R), green (G), blue (B) tristimulus image pixel accurately overlaps, to obtain the light engine technical scheme of high-resolution coloured image, belong to little display technique field.
Background technology
At present, the development trend of digital display technique is with high definition, and large screen display is a prerequisite.Relative other flat panel display, liquid crystal on silicon (Lcos) microdisplay optical engine has following significant advantage: first resolution height, and the resolution lift technique still has than large space; It two is that color representation power is strong, and colour reproduction is good.Based on colour transfer all be object color basically, so, adopt the little display technique of liquid crystal on silicon, can on projection screen, obtain the coloured image of the best; It three is cost performance height, the display screen more than 50 inches especially, and the complete machine cost is relatively stable, and performance is more reliable.
In light engine, from light source, light through the polarizer and the ejaculation of condenser light fixture, it can be P attitude linear polarization white light, it also can be S attitude linear polarization white light, then respectively through selecting look filtering polarization conversion sheet, light beam is divided into red (R), green (G), blue (B) three primary colours, the three primary colours light beam is carried out the light intensity spatial modulation by three reflective type silicon-based liquid crystals (Lcos) respectively, form the tristimulus image signal, synthesize a branch ofly again through polarization branch/close light microscopic, be presented on the screen through projection lens, thereby form coloured image.
Chinese patent database by retrieval, in recent years, in the patent documentation with regard to the light engine correlation technique, there are the patent No. and the patent name of having authorized to be respectively CN2510883Y " reflective type silicon-based liquid crystal projector and optical facilities ", CN2650178Y " reflection type liquid crystal demonstration ray machine " and CN1131452C " LCD projector " also have publication number and denomination of invention to be respectively CN1460875A " reflection type liquid crystal demonstration ray machine " and CN1540392A " a kind of reflection type liquid crystal demonstration ray machine " etc.From these documents as can be seen: the light engine function is similar substantially, and structure is substantially identical, and all can realize red (R) to a certain extent, green (G), the branch of blue (B) three primary colours light beam with close, thereby on the display screen of projection lens, form coloured image.But, as everyone knows: light engine is the core component in little display technique, is greatly determining the brightness of image, sharpness, contrast, tone, color saturation, brightness uniformity, functional reliability, maintenanceability, mean down time, technical indicator and requirements such as serviceable life and complete machine cost.Obviously, low cost, high-quality large-scale production light engine is the essential condition that realizes the industrialization of liquid crystal on silicon display technique product.Therefore, at light engine involved in the above-mentioned document, shortcoming such as it is on the low side still to exist color image resolution, and sharpness is relatively poor, and contrast is low.Cause one of reason of these defectives existence, " dichronic mirror (12) is a planar dichroic mirror that is coated with double-colored spectro-film " described in the disclosed instructions of application for a patent for invention of publication number CN1540392A " a kind of reflection type liquid crystal demonstration ray machine ".What be worth particularly pointing out is, the technical pattern of this mirror is for realizing this technical scheme, obviously there is following technological deficiency: the substrate that carries two look spectro-films, it is the use of the parallel plane glass plate of monolithic 45 degree settings, produce laterally moving of this road optical imagery inevitably, caused the macroscopic view of tristimulus image pixel discrete.Caused red (R) in addition, green (G), the optical medium in blue (B) three road imaging optical paths is asymmetric, causes three road optical aberration correction out of trim, influences image quality.For this reason, must manage to remove the influence of this factor, to obtain satisfied coloured image.
Summary of the invention
A kind of optical engine for reflection type silicon based tiny display of liquid crystal that purpose of the present invention provides with regard to being to overcome the deficiency of above-mentioned prior art.Exactly, it is a kind of for realizing red (R), green (G), the light path complete equipilibrium of blue (B) three road imaging passages in the glass medium, and the horizontal image drift that three road imaging passages produce is synchronous fully, thereby guarantee red (R), green (G) on imaging surface, blue (B) tristimulus image pixel accurately overlaps, to obtain the light engine technical scheme of high-resolution coloured image.
In the light engine technical scheme provided by the present invention, comprised that light source 1, polarizer 2, spotlighting assembly 3, first select look filtering polarization conversion sheet 4, polarization branch/light-combining prism (PBS) 5, compensation glass plate 6, two look branches/close light microscopic 20, wide band lambda/4 wave plates 21, liquid crystal on silicon chip 8, second to select look filtering polarization conversion sheet 14, analyzer 15, projection lens 16.Wherein, two look branches/close light microscopic 20 has comprised substrate glass plate 9, two look branches/close light film 10 and cover glass plate 11 again; And wide band lambda/4 wave plates 21 have comprised green (G) look wide band lambda/4 wave plates 7, red (R) look wide band lambda/4 wave plates 12 and indigo plant (B) look wide band lambda/4 wave plates 13.And 12 groups of being made of each part mentioned above amount to 24 kinds of light engine technical schemes.Light source 1 described in the present invention can be white light (natural light) light source of high brightness, also can be high-intensity three primary colours radiant or LASER Light Source.
Polarizer described in the present invention is a light polarization mechanism of utilizing optical material, can efficiently natural light be converted to linearly polarized light.With its frame mode or the difference of direction is set, polarizer can produce P attitude linearly polarized light, also can generate S attitude linearly polarized light, and what be commonly referred to as that the light face of shaking is parallel to paper is P attitude light, and the light face that shakes is S attitude polarized light perpendicular to paper.
Described in the present invention first and second selects look filtering polarization conversion sheet 4,14 to design as required, with red (R), green (G), select one or both coloured light in blue (B) three primary colours light, and its direction of vibration revolved around optical axis turn 90 degrees, promptly a certain or certain two kinds of coloured light are by after it, or are converted to S attitude polarized light by P attitude polarized light, or being converted to P attitude polarized light by S attitude polarized light, the polarization direction of other primary lights then remains unchanged.
Polarization branch described in the present invention/close light microscopic (PBS) the 5th uses Brewster (Brewster) law, method with vacuum coating, the medium that will have the height different refractivity replaces evaporation on the inclined-plane of right-angle prism, forms with another right-angle prism gummed again.So this rete has just possessed the attribute of high efficiency transmission P attitude polarized light and efficient reflection S attitude polarized light.That is to say when light normal incidence, 45 degree incident angles are arranged then on face, satisfy the polarizing angle of design.If incident beam is assembled or is dispersed, this rete can be designed to about 45 degree one can rise among a small circle inclined to one side.This rete can be discerned polarized light, and insensitive to the color of light, promptly only " know partially ", and not " knowledge look ".
Two look branches described in the present invention/close light microscopic 20 and compensation glass plate 6 is vitals of this light engine.Two look branches/close light microscopic wherein by the substrate glass plate, two look branches/close light film and cover glass plate totally 3 parts constitute, and one of feature is described two look branches/close light film evaporation between substrate glass plate and cover glass plate, through composing as a whole parts.Two of feature is that described two look branches/close the light film are red (R), green (G) two primary colours, or red (R), blue (B) two primary colours, or blue (B), green (G) two primary colours, combination in totally 3.Three of feature is that described substrate glass plate and cover glass plate are two same materials, the parallel plane glass plate of same specification.Four of feature is described compensation glass plates, is one and substrate glass plate and the same material of cover glass plate, and same specification, its thickness are the parallel plane glass plate of substrate glass plate and cover glass plate thickness sum.Five of feature is that described compensation glass plate is arranged on polarization branch/close between light microscopic and wide band lambda/4 wave plates, and make the compensation glass plate be I, III quadrant or II, the setting of IV quadrant, wide band lambda/4 wave plates place between compensation glass plate and the liquid crystal on silicon chip, constitute single primary colours single channel light path.Six of feature is that described two look branches/close light microscopic is arranged between polarization branch/close light microscopic and two wide band lambda/4 wave plates, and make two look branches/close light microscopic be I, III quadrant or II, the setting of IV quadrant, and two wide band lambda/4 wave plates place and two look branches/and close between the pairing liquid crystal on silicon chip of light microscopic, constitute two primary colours binary channels light paths.Above-described I, III quadrant or II, IV quadrant are provided with the position of the compensation glass plate of mathematics rectangular coordinate system location definition and two look branches/close light microscopic.
Here what deserves to be explained is that in this light engine, all optical components that relates to imaging then will be considered the requirement of ideal image.So-called ideal image is exactly that imaging is clear with thing, as similar.Certainly, it is impossible meeting this requirement fully, promptly puts thing and can not become a picture, and imaging has had defective, and this has just produced the notion of " image quality evaluation " or " aberration ", can propose reasonably " tolerance for aberration " according to different requirements.The factor that influences picture element is a lot, and is also very complicated, and they should be optical texture parameters (curvature of lens, refractive index, thickness, at interval, focal length, field angle, aperture angle, coefficient of vignetting or the like) and the function of optical wavelength bandwidth.By theory of geometric optics, can summarize 7 kinds of aberrations (do not specifically describe, the place of mentioning lists again).Two look branches/close light microscopic really works in light path is two look branches/close light retes, play the branch light action during illumination, rise during imaging and close light action, must be attached on the substrate glass owing to too thin, the adding of this piece glass just brings two problems: the one, and the parallel plane glass plate that light is laid by inclination can produce parallel transversal displacement (have normal incidence only and just transversal displacement can not take place), if diverging light or converging light (this is the imaging optical path of often using), for the convergence in the small angle range or when dispersing, transversal displacement and angle are linear relationships, when polarizers of big angle scope, transversal displacement and angle are nonlinear relationships.Can cause in imaging optical path that thus optical imagery also produces transversal displacement on the image planes, along with the increase of field angle, the picture displacement of the corresponding coloured light of screen edge is more obvious, and image three-colo(u)r is dispersed, and (this is that ray refraction moves, and irrelevant with " aberration " notion), cause image blur unclear.The 2nd, indivedual parallel plane glass plates that add in the imaging optical path, no matter be vertical or tilt to lay, aberration is brought in the capital, and glass plate is thick more, aperture angle is big more, aberration is also big more, wherein has plenty of monochromatic light aberration (being the aberration of the light generation of single wavelength), show as a thing and can not get a picture, in addition, also have plenty of the polychromatic light aberration, i.e. Bai Se the some thing luminous point picture of all kinds that obtains dispersing by imaging (suppose here each coloured light proofreaied and correct monochromatic aberration), this is called " aberration " in Aberration Theory.Dull and stereotyped aberration can't be realized proofreading and correct by dull and stereotyped combination.Because the aberration that they produce is the value of mark-hold, can only go by means of the aberration of lens to cancel each other.Problem is that the adding owing to the parallel plane glass plate makes light path lose balance in three road imaging optical paths, and promptly except shared components and parts, all the other components and parts should be identical, so that the balance aberration.So among the present invention, two look branches in the binary channels light path/close and set up a block protection glass plate on the light microscopic have also been set up a block compensation glass plate in the single channel light path.
Based on the compensation glass plate of setting up in cover glass plate of setting up in the binary channels light path and the single channel light path, they only know look, do not rise partially, promptly only play on-off action, the light wave propagation approach are not exerted an influence.So the horizontal image drift that the introducing of this class flat glass plate can make three road imaging passages produce on imaging surface is synchronous fully, to eliminate macroscopical discrete phenomena of image three-colo(u)r.In addition, the idea from anaberration helps aberration balancing, reaches the picture element requirement, thereby has realized the light path complete equipilibrium of three road imaging passages in the glass medium, and the horizontal image drift that three road imaging passages produce on imaging surface is synchronous fully.Guarantee the accurate coincidence of image three-colo(u)r pixel from principle, obtained the coloured image of high definition in practice.
Liquid crystal on silicon described in the present invention (Lcos) chip 8 is employed as spatial light modulator, it spatially lines up the array of two-dimentional separate unit (pixel), the control of electrical signal all can independently be accepted in each unit, and the optical property of pressing this signal change self, thereby the light carrier that throws light on it is modulated, the vision signal of input is called " write signal ", throw light on whole during also modulated light wave be called " reading light "; What need emphasize is, because the electricity and the optical characteristics of liquid crystal make incident light and polarization of reflected light attitude mutually orthogonal.In addition, λ/4 wave plates should be the coloured light broadband waveplates of one of corresponding three primary colours, work to improve picture quality.And analyzer 15 and projection lens 16 are necessary devices of polarized light imaging and liquid crystal display.
Here illustrate that in conjunction with Fig. 1 a little procedure for displaying of the present invention is as follows: suppose that be P attitude polarized light from light source 1 through the light of polarizer 2 and 3 ejaculations of spotlighting assembly, then select look filtering polarization conversion sheet 4 through I, if leach red (R) primary lights, then revolve and turn 90 degrees back one-tenth S attitude light, S attitude red (R) primary lights are reflected on the spectro-film of polarization branch/close light microscopic (PBS) 5 smoothly, keep S attitude red (R) light continuing (to be I by compensation glass plate 6, the III quadrant is provided with) after, again by red (R) look wide band lambda/4 wave plates 12, so through liquid crystal on silicon (Lcos) chip 8 is modulated P attitude red (R) coloured light that converts to again of S attitude red (R) coloured light of reflection.Thus, constitute single pass red (R) primary lights light path, it can see through polarization branch/the close spectro-film of light microscopic (PBS) 5 smoothly.Select remaining green (G) primary lights and indigo plant (B) primary lights of look filtering polarization conversion sheet 4 through I; it is constant to keep original P attitude polarization mixed light; transmission constitutes twin-channel green (G) coloured light and blue (B) coloured light mixed optical path on the spectro-film of polarization branch/close light microscopic (PBS) 5; continue process by substrate glass plate 9; two look branches/close light film 10; two look branches that cover glass plate 11 constitutes/close light microscopic 20; and keep P attitude polarized light to be divided into two on the light film 10 at two look branches/close; this two looks branch/close light film 10; only play reflection green (G) coloured light; the effect of transmission indigo plant (B) coloured light; and to insensitive under the polarization state; after passing through green (G) look wide band lambda/4 wave plates 7 and blue (B) look wide band lambda/4 wave plates, 13 through corresponding separately liquid crystal on silicon (Lcos) chips 8 that link to each other again respectively, indigo plant (B) coloured light of green (G) coloured light of reflection and transmission is all modulated and convert green (G) coloured light and indigo plant (B) coloured light of S attitude polarization to.These two kinds of primary lights can be polarized the spectro-film reflection of branch/close light microscopic (PBS) 5 equally smoothly.So far arrive polarization branch/close red (R) on light microscopic (PBS) 5 spectro-films, green (G), the light path on three road optical channels that blue (B) three primary colours light beam is experienced is a complete equipilibrium.Thereby can eliminate the discreteness of tristimulus image on the imaging surface, guarantee to realize high-quality coloured image.Certainly, it must be noted that, arrive polarization branch/close red (R) on light microscopic (PBS) 5 spectro-films this moment, green (G), the polarization direction of blue (B) three primary colours light beam is different, and promptly red (R) coloured light is P attitude polarization, and green (G) coloured light and indigo plant (B) light are S attitude polarization.Select look filtering polarization conversion sheet 14 by second, green (G) coloured light and indigo plant (B) coloured light that just are easy to be S attitude polarization convert P attitude polarization to.Red so (R), green (G), blue (B) three primary colours light beam all is P attitude polarized light, and simultaneously through analyzer 15, is mapped to projection lens 16 at last synchronously, shows high-quality coloured image on screen.
Description of drawings
Fig. 1 a is the present invention's P attitude white polarized light incident, select red (R) look filtering and revolve and turn 90 degrees, all the other green (G), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Wherein, the 1st, light source, the 2nd, polarizer, the 3rd, the spotlighting assembly, 4 is that I selects look filtering polarization conversion sheet, the 5th, and polarization branch/close light microscopic (PBS), the 6th, compensation glass plate, 20 is two look branches/close light microscopics, the 21st, wide band lambda/4 wave plates, the 8th, the liquid crystal on silicon chip, 14 is second to select look filtering polarization conversion sheet, the 15th, analyzer, the 16th, projection lens.Wherein, two look branches/close light microscopic (20) have comprised substrate glass plate (9) again, two look branches/close light film (10) and cover glass plate (11); And wide band lambda/4 wave plates (21) have comprised green (G) look wide band lambda/4 wave plates (7), red (R) look wide band lambda/4 wave plates (12), blue (B) look wide band lambda/4 wave plates (13).
Fig. 1 b is the present invention's P attitude white polarized light incident, select red (R) look filtering and revolve and turn 90 degrees, all the other green (G), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 2 a is the present invention's P attitude white polarized light incident, select green (G) look filtering and revolve and turn 90 degrees, all the other red (R), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 2 b is the present invention's P attitude white polarized light incident, select green (G) look filtering and revolve and turn 90 degrees, all the other red (R), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 3 a is the present invention's P attitude white polarized light incident, select blue (B) look filtering and revolve and turn 90 degrees, all the other red (R), green (G) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 3 b is the present invention's P attitude white polarized light incident, select blue (B) look filtering and revolve and turn 90 degrees, all the other red (R), green (G) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 4 a is the present invention's P attitude white polarized light incident, select green (G), red (R) look filtering and revolve and turn 90 degrees, all the other indigo plants (B) look keeps ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 4 b is the present invention's P attitude white polarized light incident, select green (G), red (R) look filtering and revolve and turn 90 degrees, all the other indigo plants (B) look keeps ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 5 a is the present invention's P attitude white polarized light incident, select blue (B), red (R) look filtering and revolve and turn 90 degrees, all the other green (G) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 5 b is the present invention's P attitude white polarized light incident, select blue (B), red (R) look filtering and revolve and turn 90 degrees, all the other green (G) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 6 a is the present invention's P attitude white polarized light incident, select blue (B), green (G) look filtering and revolve and turn 90 degrees, all the other red (R) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 6 b is the present invention's P attitude white polarized light incident, select blue (B), green (G) look filtering and revolve and turn 90 degrees, all the other red (R) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 7 a is the present invention's S attitude white polarized light incident, select red (R) look filtering and revolve and turn 90 degrees, all the other green (G), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.
Fig. 7 b is the present invention's S attitude white polarized light incident, select red (R) look filtering and revolve and turn 90 degrees, all the other green (G), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 8 a is the present invention's S attitude white polarized light incident, select green (G) look filtering and revolve and turn 90 degrees, all the other red (R), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 8 b is the present invention's S attitude white polarized light incident, select green (G) look filtering and revolve and turn 90 degrees, all the other red (R), blue (B) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 9 a is the present invention's S attitude white polarized light incident, select blue (B) look filtering and revolve and turn 90 degrees, all the other red (R), green (G) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Fig. 9 b is the present invention's S attitude white polarized light incident, select blue (B) look filtering and revolve and turn 90 degrees, all the other red (R), green (G) dichromatism keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 10 a is the present invention's S attitude white polarized light incident, select green (G), red (R) look filtering and revolve and turn 90 degrees, all the other indigo plants (B) look keeps ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 10 b is the present invention's S attitude white polarized light incident, select green (G), red (R) look filtering and revolve and turn 90 degrees, all the other indigo plants (B) look keeps ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 11 a is the present invention's S attitude white polarized light incident, select blue (B), red (R) look filtering and revolve and turn 90 degrees, all the other green (G) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 11 b is the present invention's S attitude white polarized light incident, select blue (B), red (R) look filtering and revolve and turn 90 degrees, all the other green (G) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that II, IV quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 12 a is the present invention's S attitude white polarized light incident, select blue (B), green (G) look filtering and revolve and turn 90 degrees, all the other red (R) looks keep ortho states to pass through, and two look branches/close light microscopic 20 and compensation glass plate 6 all are the light path constructing technology scheme principle schematic that I, III quadrant are provided with.Each serial number name is with Fig. 1 a among the figure.
Figure 12 b is the present invention's S attitude white polarized light incident, select blue (B), green (G) look filtering and revolve and turn 90 degrees, all the other red (R) looks keep ortho states to pass through, and two look branches/close light microscopic and 20 compensation glass plates 6 all are the light path constructing technology scheme principle schematic of II, the setting of IV quadrant.Each serial number name is with Fig. 1 a among the figure.
Embodiment
Fig. 1 a, Fig. 1 b to Figure 12 a, Figure 12 b are the present invention's a concrete example of implementing.From Fig. 1 a to Figure 12 b as can be seen: the present invention is by light source 1; polarizer 2; spotlighting assembly 3; first selects look filtering polarization conversion sheet 4; polarization branch/close light microscopic (PBS) 5; compensating plate 6; green (G) look wide band lambda/4 wave plates 7, liquid crystal on silicon (Lcos) chip 8, two look branches/close light microscopic 20 (substrate glass plate 9; two look branches/close light film 10; cover glass plate 11), red (R) look wide band lambda/4 wave plates 12, blue (B) look wide band lambda/4 wave plates 13; second selects look filtering polarization conversion sheet 14, and analyzer 15 and projection lens 16 constitute.And set from Fig. 1 a to Fig. 6 b to being P attitude polarized light through the light that polarizer 2 and spotlighting assembly 3 penetrate from light source 1.Setting from Fig. 7 a to Figure 12 b for being S attitude polarized light through the light that polarizer 2 and spotlighting assembly 3 penetrates from light source 1.Thus, can make up following 12 groups and amount to 24 kinds of light engine technical schemes of the present invention:
Be that Fig. 1 a or Fig. 1 b are for selecting the incident of P attitude polarized light, select red (R) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And red wide band lambda/4 wave plates 12 are inserted the red single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are green and blue to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, blue dichromatism binary channels light path.
Fig. 2 a or Fig. 2 b are for selecting the incident of P attitude polarized light, select green (G) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And green wide band lambda/4 wave plates 7 are inserted the green single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are red and blue to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute red, blue dichromatism binary channels light path.
Fig. 3 a or Fig. 3 b are for selecting the incident of P attitude polarized light, select blue (B) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic 20 and blue wide band lambda/4 wave plates 13, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And blue wide band lambda/4 wave plates 13 are inserted the blue single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are green and red to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, red dichromatism binary channels light path.
Fig. 4 a or Fig. 4 b are for selecting the incident of P attitude polarized light, select red (R), green (G) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, red dichromatism binary channels light path.Remaining blue light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and blue wide band lambda/4 wave plates 13, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and blue wide band lambda/4 wave plates 13 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute blue single channel light path.
Fig. 5 a or Fig. 5 b are for selecting the incident of P attitude polarized light, select red (R), blue (B) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and blue wide band lambda/4 wave plates 13 and red wide band lambda/4 wave plates 12, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and blue wide band lambda/4 wave plates 13 and red wide band lambda/4 wave plates 12 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute blue, red dichromatism binary channels light path.Remaining green light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute green single channel light path.
Fig. 6 a or Fig. 6 b are for selecting the incident of P attitude polarized light, select green (G), blue (B) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, blue dichromatism binary channels light path.Remaining red light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute red single channel light path.
Fig. 7 a or Fig. 7 b are for selecting the incident of S attitude polarized light, select red (R) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And red wide band lambda/4 wave plates 12 are inserted the red single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are green and blue to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, blue dichromatism binary channels light path.
Fig. 8 a or Fig. 8 b are for selecting the incident of S attitude polarized light, select green (G) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And green wide band lambda/4 wave plates 7 are inserted the green single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are red and blue to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute red, blue dichromatism binary channels light path.
Fig. 9 a or Fig. 9 b are for selecting the incident of S attitude polarized light, select blue (B) look again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and blue wide band lambda/4 wave plates 13, and makes compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant.And blue wide band lambda/4 wave plates 13 are inserted the blue single channel light path of formation between compensation glass plate 6 and the liquid crystal on silicon chip 8.All the other are green and red to be transmitted through two look branches/close light microscopic 20 via polarization branch/close light microscopic (PBS) 5, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and red wide band lambda/4 wave plates 12 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, red dichromatism binary channels light path.
Figure 10 a or Figure 10 b are for selecting the incident of S attitude polarized light, select red (R), green (G) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12 and green wide band lambda/4 wave plates 7, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 and green wide band lambda/4 wave plates 7 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute red, green dichromatism binary channels light path.Remaining blue light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and blue wide band lambda/4 wave plates 13, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and blue wide band lambda/4 wave plates 13 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute blue single channel light path.
Figure 11 a or Figure 11 b are for selecting the incident of S attitude polarized light, select red (R), blue (B) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute red, blue dichromatism binary channels light path.Remaining green light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute green single channel light path.
Figure 12 a or Figure 12 b are for selecting the incident of S attitude polarized light, select green (G), blue (B) again and revolve and turn 90 degrees, via the polarization branch/closing light microscopic (PBS) 5 reflects, two look branches/close light microscopic 20 is arranged on polarization branch/close between light microscopic (PBS) 5 and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13, and make two look branches/close light microscopic 20 be I, III quadrant or II, the setting of IV quadrant, and green wide band lambda/4 wave plates 7 and blue wide band lambda/4 wave plates 13 are inserted two look branches/close between light microscopic 20 and the liquid crystal on silicon chip 8, constitute green, blue dichromatism binary channels light path.Remaining red light is via polarization branch/close light microscopic (PBS) 5 to be transmitted through compensation glass plate 6, compensation glass plate 6 is arranged on polarization branch/close between light microscopic (PBS) 5 and red wide band lambda/4 wave plates 12, and make compensation glass plate 6 be I, III quadrant or II, the setting of IV quadrant, and red wide band lambda/4 wave plates 12 are inserted between compensation glass plate 6 and the liquid crystal on silicon chip 8, constitute red single channel light path.
To sum up respectively scheme described, in red single channel, when described compensation glass plate 6 is set to I, III quadrant, two look branches described in then green, the blue binary channels/close light microscopic 20 to be set to I, III quadrant; And when compensation glass plate 6 is set to II, IV quadrant, two look branches described in then green, the blue binary channels/close light microscopic 20 to be set to II, IV quadrant.
In green single channel, when described compensation glass plate 6 is set to I, III quadrant, two look branches described in then red, the blue binary channels/close light microscopic 20 to be set to I, III quadrant; And when compensation glass plate 6 is set to II, IV quadrant, two look branches described in then red, the blue binary channels/close light microscopic 20 to be set to II, IV quadrant.
In blue single channel, when described compensation glass plate 6 is set to I, III quadrant, two look branches described in then red, the green binary channels/close light microscopic 20 to be set to I, III quadrant; And when compensation glass plate 6 is set to II, IV quadrant, two look branches described in then red, the green binary channels/close light microscopic 20 to be set to II, IV quadrant.
Claims (8)
1. optical engine for reflection type silicon based tiny display of liquid crystal, comprised light source (1), the polarizer (2), spotlighting assembly (3), first selects look filtering polarization conversion sheet (4), polarization branch/close light microscopic PBS (5), compensation glass plate (6), two look branches/close light microscopic (20), wide band lambda/4 wave plates (21), liquid crystal on silicon (Lcos) chip (8), second selects look filtering polarization conversion sheet (14), analyzer (15) and projection lens (16), wherein, two look branches/close light microscopic (20) have comprised substrate glass plate (9) again, two look branches/close light film (10) and cover glass plate (11); And wide band lambda/4 wave plates (21) have comprised and it is characterized in that green (G) look wide band lambda/4 wave plates (7), red (R) look wide band lambda/4 wave plates (12), blue (B) look wide band lambda/4 wave plates (13):
A, described compensation glass plate (6) is arranged on polarization branch/close between light microscopic (5) and wide band lambda/4 wave plates (21), and make the compensation glass plate be I, III quadrant or II, the setting of IV quadrant, and wide band lambda/4 wave plates (21) place between compensation glass plate (6) and the liquid crystal on silicon chip (8), constitute single primary colours single channel light path;
B, described two look branches/close light microscopic (20) is arranged between polarization branch/close light microscopic (5) and two wide band lambda/4 wave plates (21), and make two look branches/close light microscopic (20) be I, III quadrant or II, the setting of IV quadrant, and two wide band lambda/4 wave plates place and two look branches/close between the pairing liquid crystal on silicon chip of light microscopic (20) (8), constitute two primary colours binary channels light paths.
2. according to the described light engine of claim 1, it is characterized in that: described two look branches/close light film (10) evaporation between substrate glass plate (9) and cover glass plate (11), and two plates are parallel to each other, and the three is overlapping, through composing as a whole parts.
3. according to claim 1 and 2 described light engines, it is characterized in that: described two look branches/close light film (10) are red (R), green (G) two primary colours, or red (R), blue (B) two primary colours, or blue (B), green (G) two primary colours, amount to 3 kinds of combinations.
4. according to the described light engine of claim 1, it is characterized in that: described substrate glass plate (9) and cover glass plate (11) are the parallel plane glass plate of two same materials, same specification.
5. according to the described light engine of claim 1; it is characterized in that: described compensation glass plate (6) be one with substrate glass plate (9) and the same material of cover glass plate (11), same specification, its thickness is the parallel plane glass plate of substrate glass plate (9) and cover glass plate (11) thickness sum.
6. according to the described light engine of claim 1, it is characterized in that: in red single channel, when described compensation glass plate (6) is set to I, III quadrant, two look branches described in then green, the blue binary channels/close light microscopic (20) to be set to I, III quadrant; And when compensation glass plate (6) is set to II, IV quadrant, two look branches described in then green, the blue binary channels/close light microscopic (20) to be set to II, IV quadrant.
7. according to the described light engine of claim 1, it is characterized in that: in green single channel, when described compensation glass plate (6) is set to I, III quadrant, two look branches described in then red, the blue binary channels/close light microscopic (20) to be set to I, III quadrant; And when compensation glass plate (6) is set to II, IV quadrant, two look branches described in then red, the blue binary channels/close light microscopic (20) to be set to II, IV quadrant.
8. according to the described light engine of claim 1, it is characterized in that: in blue single channel, when described compensation glass plate (6) is set to I, III quadrant, two look branches described in then red, the green binary channels/close light microscopic (20) to be set to I, III quadrant; And when compensation glass plate (6) is set to II, IV quadrant, two look branches described in then red, the green binary channels/close light microscopic (20) to be set to II, IV quadrant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610019365 CN1916693A (en) | 2006-06-15 | 2006-06-15 | Optical engine for reflection type silicon based tiny display of liquid crystal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610019365 CN1916693A (en) | 2006-06-15 | 2006-06-15 | Optical engine for reflection type silicon based tiny display of liquid crystal |
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| Publication Number | Publication Date |
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| CN1916693A true CN1916693A (en) | 2007-02-21 |
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| CN 200610019365 Pending CN1916693A (en) | 2006-06-15 | 2006-06-15 | Optical engine for reflection type silicon based tiny display of liquid crystal |
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