CN202583682U - Compact liquid-crystal projecting-light-engine system adopting mixing light source - Google Patents
Compact liquid-crystal projecting-light-engine system adopting mixing light source Download PDFInfo
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Abstract
The utility model provides a compact liquid-crystal projecting-light-engine system adopting a mixing light source and the light-engine system consists of a light-source module, a polarized-light management module, an image signal module and a projection lens. The light-source module consists of high-brightness laser, a non-coherence LED and a fluorescence device and raises output brightness of the projection system to a great extent and is safe and environmentally friendly. The projection image has brilliant colors and clear image quality. The polarized-light management module consists of polarization beam-splitting prisms (PBS) and a polarization color-combination device and integrates tricolor mixing light with different polarization states into same polarized light and irradiates to the image signal module. The image signal module is a single-leaf reflective liquid-crystal light-modulation device and sequentially loads the image signal to tricolor polarized light based on the image signal corresponding to each primary color. The projection lens projects light with the image signal on the screen.
Description
Technical field
The utility model relates to a kind of projection display system, relates in particular to a kind of compact reflection type liquid crystal projection light engines system of mixing three primary light source that adopts.
Background technology
Projection Display has become the main flow mode that large-screen high-resolution dynamically shows, is widely used in important steps such as commercial affairs, education, scientific research, amusement and family.In recent years, along with the fast development of many technology such as microelectronics, optics, processing technology, and popularizing of modern business mobile office pattern and increasing of hand-held digital product, the microminiaturized new direction that becomes the projection display technique development again.Minitype projection machine has light and handy and easy to use grade for remarkable advantage, can combine with all kinds of consumption electronic products, and this makes the application of micro projection become infinitely wide.
Minitype projection machine all has strict requirement to brightness, resolution, volume, power consumption, cost and heat radiation etc.Realize high brightness, high resolving power, small size, low-power consumption and micro projection system cheaply, just must do very big improvement even innovation in many-sides such as light source, optical modulation device, optical system and optical device.
At present, micro projection is main with DLP (Digital Lighting Processor) and LCoS (Liquid Crystal on Silicon) technology mainly.DLP and LCoS technology are array reflection type projection technology.It is high and need not advantage such as polarized light that the DLP technology has a reflectivity, but its chip DMD (Digital Mirror Device) processing procedure is extremely complicated, for TI company exclusively controls.The LCoS technology has advantages such as high resolving power and low cost, rich color, and image fidelity, technical in addition opening is fit to micro projection to high resolving power and harsh cheaply requirement very much.But the ubiquity complete machine output brightness of LCoS micro projection system is on the low side and problems such as volume is bigger, and user's visual experience is good inadequately, carries inconvenience, and it is universal with further that this has hindered the microminiaturization of optical projection system.
Present micro projection adopts LED as lighting source mostly.LED has that volume is little, the life-span is long, response is fast and advantages such as energy-conserving and environment-protective, but on micro projection is used, still exists the LED luminous flux not high, and the luminous flux on the unit optical extend is lower than traditional projection light source, and problem such as thermal value is excessive.Along with the development in market, each LED manufacturer is also continually developing the led light source that is applicable to micro projection.For example, Ou Silang (OSRAM) will develop electro-optical efficiency up to 61% red-light LED (predominant wavelength is 609nm) in the end of the year 2011.At 1mm
2Chip, working current can be realized light efficiency up to 201 lm/W during for 40mA, and the high light efficiency of 168 lm/W still can be provided under the exemplary operation electric current of 350mA.Luminescence efficiency is high more, and chip area is more little, and this brings bigger space for the miniature projection optical system design.In addition, because the luminescence efficiency difference of different monochromatic LEDs, LED manufacturer also adopts the fluorescent powder technology, and the high advantage of some wavelength LED luminescence efficiency of usefulness prepares the LED of other wavelength, to improve the luminescence efficiency of this wave band.Usually, green wave band LED luminescence efficiency is lower, but the proportion that green glow accounts in optical projection system is maximum.For addressing this problem, Ou Silang adopts the LED excitated fluorescent powder of wavelength 420nm to produce the green glow of 520nm, makes the output light flux of green glow under equal-wattage, promote one times, reaches the high brightness of 500 lm under the 1.4A working current.In the brightness obvious lifting is arranged though the LED excitated fluorescent powder makes, also exist not enough: 1) spectral range is wide, though in green range, still there is portion of energy in predominant wavelength in other wavelength coverages.Fluorescent powder excites the FWHM (halfwidth degree) of green light LED to increase twice and arrives 100nm more, and common green light LED is merely 44nm.2) colour purity reduces greatly, and the energy in other primary colours scopes can not effectively be utilized by system.3) fluorescent powder excites the lighting angle of LED to increase to some extent, makes the optical extend of light source increase, and brings pressure for the design of follow-up system.
Another kind of emerging light source is a laser.Laser has very high brightness, need not remarkable advantages such as focusing and colour gamut broadness as the optical projection system of light source, and this all is that the LED optical projection system is incomparable.In addition, the high polarization single look red-green-blue light of laser is even more important to the LCoS micro display system.But also there is the shortcoming that is difficult to overcome in laser projection: 1) very green laser commercialization not yet, cost is too high.Present green laser produces based on frequency doubling technology mostly; 2) there is safety problem.Research shows that laser scanning projection is the highest when Class2 can only to reach 20 lumens, and just can reach 20 lumens based on the laser projection system of panel at Class1, when Class2, can reach the hundreds of lumen.Thus it is clear that, have superiority than scanning-projection system based on the optical projection system of panel; 3) image speckle.Because the strong coherence of laser, the display image picture is interfered and presents graininess, is easy to generate visual fatigue, and the sense organ comfort level reduces greatly.Therefore, in laser projection, go the speckle technology very crucial.Though the angle diversity is arranged, the polarization diversity, the wavelength diversity uses methods such as special or moving screen to eliminate speckle, and every kind of method all has its limitation.
LED and laser all respectively have advantage, but performance and speed of development lag behind little demand of putting into market separately.If adopt the single kind light source, system always exist or brightness not high, or image speckle, or problem such as volume is excessive.If can various LED and laser be combined; Utilize the high brightness characteristic of laser; The low interference capability that uses LED again slackens the laser image speckle and improves security, and this will be of great advantage at aspects such as high brightness, low-power consumption, small size and low costs to micro projection.
To different types of light source effectively be combined, just need system a---photo engine of polarized light management efficiently, energy of light source is passed to optical modulation device.The simplest method is on traditional micro projection light engine arrangement, to change emerging solid light source.For example, adopt traditional X-Cube micro projection photo engine (US6018418) structure.But this structure will be noted the physical characteristics of light source itself when light source position is put, if two LASER Light Sources are put relatively, has the lasing fluorescence chip of another light source of residual light directive, causes the LASER Light Source damage.If adopt two dichroic mirror (Dichroic Mirror) structures, volume can obviously increase and be lower to the collection rate of non-laser light source.
The patent (number of patent application is 201110168636.3) of applicant's application provides a kind of brand-new reflective micro projection light engine arrangement.This structure adopts the three-primary color LED illumination; The polarization that utilizes polarization beam splitter prism (PBS:Polarization Beam Splitter) and polarization interference optical filter to form is integrated light path, and the three primary colours polishing of different polarization states is combined into same polarized light and according to the image modulation device.Adopt the light recovery structure simultaneously, the light that does not get into subsequent optical path for the first time is repeated to utilize after the polarization rotation, can effectively utilize two kinds of polarization states of three primary colours light.The light utilization efficiency of this photo engine is high, but volume is bigger than normal.If adopt the three-primary color LED illumination, the output of total system is measured still on the low side.For solving the problem of big volume and low-light level; The illuminator that this patent adopts LED, laser and fluorescent device to mix mutually; In conjunction with a kind of light engine arrangement of compact, do not causing on speckle and the safety issue basis, promote the output brightness of micro projection system to greatest extent.
Summary of the invention
The purpose of the utility model is the deficiency to prior art, and a kind of compact crystal projection light engine systems that adopts hybrid light source is provided.The utility model adopts different types of solid light source, and------LED and laser in conjunction with the light engine arrangement of compact, make the output brightness of complete machine greatly promote, and system bulk are little, and image quality and security are able to ensure.
The purpose of the utility model realizes through following technical scheme: a kind of compact crystal projection light engine systems that adopts hybrid light source, it comprises the hybrid light source module, polarized light management module, image information module and projection lens.Wherein, Said hybrid light source module comprises red laser, blue laser, green light LED, red laser beam expanding reshaper, blue laser beam expanding reshaper, green glow light uniforming device; Red laser links to each other with red laser beam expanding reshaper; Blue laser links to each other with blue laser beam expanding reshaper, and green light LED links to each other with the green glow light uniforming device.The light regime module by polarization close color element, collector lens, polarization interference optical filter, the 2nd PBS successively arranged in co-axial alignment form.The image information module is positioned at the right-angle side of the 2nd PBS, and projection lens is positioned at the outgoing limit of the 2nd PBS.
Further, said polarization close color element by a PBS, pass through red anti-blue optical filter, pass through blue anti-red green optical filter, the broadband quarter-wave plate is formed.Wherein, The one PBS is coaxial with collector lens; Pass through the ruddiness plane of incidence that red anti-blue optical filter and broadband quarter-wave plate are glued at a PBS, pass through the blue light plane of incidence that blue anti-red green optical filter is glued at a PBS, the second broadband quarter-wave plate is glued at the green glow plane of incidence of a PBS.This polarization closes the light that color element can reuse two kinds of polarization states of green light LED.Red laser and blue laser for high-polarization can be set to second polarization state and first polarization state respectively.Like this, from the three primary colours light of a PBS outgoing, green glow is first polarization state, and ruddiness and blue light are second polarization state.Follow-up polarization interference optical filter is answered half-wave rotation green glow and is kept ruddiness and blue light polarization state constant.
Further, adopt the mode of blue laser excitation green light fluorescent powder to produce the required green of projection, again with red-light LED and blue laser mixed lighting.Described the Lights section is restrainted reshaper, red-light LED and ruddiness light uniforming device and is formed by two blue laser, thoroughly blue anti-green optical filter, green glow fluorescent plate, blue light expansion bundle reshaper, green glow expansion.Said polarization close color element by a PBS, pass through red anti-blue optical filter, pass through blue anti-red green optical filter, the broadband quarter-wave plate is formed.Wherein, The one PBS is coaxial with collector lens; Pass through the ruddiness plane of incidence that red anti-blue optical filter and broadband quarter-wave plate are glued at a PBS, pass through the blue light plane of incidence that blue anti-red green optical filter is glued at a PBS, the second broadband quarter-wave plate is glued at the green glow plane of incidence of a PBS.This polarization closes the light that color element can reuse two kinds of polarization states of red-light LED.The light that blue laser sends is set to first polarization state.The green glow that first blue LASER Excited Fluorescence powder produces is mainly first polarization state, and the second less important polarization state also can be closed the color element recycling by polarization.Another blue laser becomes second polarization state through after the polarization conversion.Like this, from the three primary colours light of a PBS outgoing, green glow is first polarization state, and ruddiness and blue light are second polarization state.Follow-up polarization interference optical filter is answered half-wave rotation green glow and is kept ruddiness and blue light polarization state constant.If need the brightness of further elevator system, can adopt red laser to replace red-light LED, the ruddiness of high-polarization directly need not recycling from a PBS outgoing.
The beneficial effect of the utility model is; On the reflection type projection light engine arrangement of compact; Adopt LED and laser mixed lighting, both can use the single polarization of laser, can reuse the light of two kinds of polarization states of the non-single polarization that led light source or fluorescent powder excites again.In theory, it is best that the optics utilization factor reaches, and the output brightness of complete machine also obtains maximum lifting, utilizes the incoherent characteristic of led light source simultaneously again, slacken the speckle phenomena that single laser light source causes, and security is ensured further also.
Description of drawings
Fig. 1 is the compact hybrid light source crystal projection light engine arrangement figure of first embodiment of the utility model;
Fig. 2 is among first embodiment of the utility model first and the ray trajectory and the polarization state figure of three primary colours;
Fig. 3 is the ray trajectory and the polarization state figure of second primary colours among first embodiment of the utility model;
Fig. 4 is the compact hybrid light source crystal projection light engine arrangement figure of second embodiment of the utility model;
Fig. 5 is the ray trajectory and the polarization state figure of first primary colours among second embodiment of the utility model;
Fig. 6 is the ray trajectory and the polarization state figure of second primary colours among second embodiment of the utility model;
Fig. 7 is the ray trajectory and the polarization state figure of three primary colours among second embodiment of the utility model;
Fig. 8 is the compact hybrid light source crystal projection light engine arrangement figure of the 3rd embodiment of the utility model;
Fig. 9 is the ray trajectory and the polarization state figure of first primary colours among the 3rd embodiment of the utility model;
Among the figure: reflection type liquid crystal projection display system 1; Light source module 2; Polarized light management module 3; Image information module 4; Projection lens 5; Red laser instrument 21; Green light LED 22; Blue laser instrument 23; The second blue laser instrument 25; Red-light LED 24; Ruddiness expands bundle reshaper 211; Green glow light uniforming device 221; Green glow expands bundle reshaper 251; Blue light expands bundle reshaper 231; Ruddiness light uniforming device 241; Pass through red anti-blue optical filter 321; Pass through blue anti-red green optical filter 323; Pass through blue anti-green optical filter 324; Green glow fluorescent plate 325; Broadband quarter-wave plate 331; The second broadband quarter-wave plate 332; Red light beam 212; Green beam 222; Blue light light beam 232; The one PBS 31; Collector lens 32; Polarization interference optical filter 33; The 2nd PBS 34.
Embodiment
The utility model comprises light source module, polarized light management module, picture signal module and projection lens.Light source module provides illumination, and for greatly promoting the brightness and the color saturation of optical projection system, the utility model adopts LED and laser mixed lighting.LED and laser solid light source itself just produce the good light of monochromaticity, and have the response speed of nanosecond order, can be the sequential keyboard encoder demonstration efficient illumination is provided.The light regime module comprises two PBS (Polarization Beam Splitter, polarization beam apparatus) and a polarization interference optical filter etc.The three primary colours hybrid light source lays respectively at three planes of incidence of a PBS.Because single polarization characteristic of the blue light that ruddiness that red laser sends and blue laser send, nearly all light gets into follow-up system through a PBS.And for green light LED, directly get into a PBS after, resolve into the first mutually orthogonal polarized light and second polarized light.First polarized light is got into the subsequent optical system by PBS reflection; And after the recycling structure that blue thoroughly anti-red green optical filter of second polarized light process and broadband quarter-wave plate are formed; Become first polarized light, merge, realize the recycling of green glow with the first previous polarized light.Therefore, all light of sending of hybrid light source can both be utilized by system.Second polarized light of ruddiness and blue light and first polarized light of green glow are through becoming second polarized light after the integration of polarization interference optical filter polarization.Afterwards, the three primary colours light of second polarization state gets into the modulate module through the 2nd PBS reflection.The modulate module is a reflection type liquid crystal image modulation device LCoS who is positioned at the 2nd PBS one right-angle side; Picture signal according to input; Divide the sequential modulation to input three primary colours light, the light modulated polarization state of carrying image information sees through the 2nd PBS and gets into projection lens after revolving and turning 90 degrees.Projection lens is positioned at the 2nd PBS outgoing limit, and the light that behind the image modulation device, carries correspondence image information with enlarging projection is on screen.
The proportion of green glow in optical projection system is maximum, for greatly promoting the output brightness of complete machine, can adopt the mode of blue laser excitation green light fluorescent powder to produce green glow, and a blue laser directly produces blue light, and another blue laser then excites green light fluorescent powder to produce green glow.Red light portion can adopt red-light LED or red laser, and the former has the better image quality, and the latter has higher output brightness.Therefore, can be from all light that light source sends by system's utilization, complete machine output brightness obtains maximum possible and promotes.
The technology contents of the utility model, characteristic and advantage etc. will be described in detail with reference to accompanying drawing.Under the situation that does not break away from the utility model scope, can make structure and otherwise change to it, and as other embodiment.The various aspects of each embodiment and each different embodiment thereof can make up use in any suitable manner.So accompanying drawing and enumeration will be counted as descriptive and nonrestrictive in essence.Should be noted that in different diagrammatic sketch identity unit adopts identical reference number to represent.
Embodiment 1
Fig. 1 provided the utility model first adopt the embodiment of the reflection type liquid crystal projection display system 1 of hybrid light source, comprise light source module 2, polarized light management module 3, image information module 4 and projection lens 5.
The polarized light of red laser instrument 21 and blue laser instrument 23 emissions is respectively through becoming the required rectangular light beam of illumination behind red laser beam expanding reshaper 211 and the blue laser beam expanding reshaper 231.The three primary colours natural light of green light LED 22 emissions is collected through green glow light uniforming device 221 backs becomes the required low-angle rectangular light beam of illumination.
Broadband quarter-wave plate 331 is glued at the ruddiness plane of incidence of a PBS 31; Again with pass through red anti-blue optical filter 321 and glue together mutually; Pass through the blue light plane of incidence that blue anti-red green optical filter 323 is glued at a PBS, broadband quarter-wave plate 331 is glued at the green glow plane of incidence of a PBS.The broadband quarter-wave plate can revolve twice three primary colours light polarization through it and turn 90 degrees.Pass through the ruddiness 212 that the red laser instrument 21 of red anti-blue optical filter 321 transmissions sends, and the blue light 232 that reflection is sent from blue laser instrument 23.Pass through the blue light 232 that the blue laser instrument 23 of blue anti-red green optical filter 323 transmissions sends, and ruddiness 212 that reflection is sent from red laser instrument 21 and the green glow 222 that sends from green light LED 22.
Picture signal module 4 is a reflection type liquid crystal projected light modulation device---a LCoS chip; Be positioned at the right-angle side of the 2nd PBS 36; The picture signal that provides according to peripheral control circuit (not shown); Sequential ground is with red light beam 212, and green beam 222 is modulated to second polarization state with blue light light beam 232 from first polarization state, comprises the coloured image of every kind of color component with formation.
Projection lens 5 is positioned at the outgoing limit of the 2nd PBS 36, will be through the red light beam of carrying corresponding image signals 212 behind the 2nd PBS36, and green beam 222 projects on the screen with blue light light beam 232.
In this example, adopt red laser instrument 21, blue laser instrument 23 and the illumination of green light LED 22 hybrid light sources.In theory, can adopt any two kinds of tricolor lasers and another kind of non-laser primary colours, but because the commercialization not yet at present of green laser, cost is very high, so this instance adopts green light LED 22 light sources.Green light LED 22 both can adopt common green light LED, and the green light LED that also can adopt fluorescent powder to excite is exported brightness with further lifting.Carrying separately the three primary colours of picture signal throws away through projection lens 5 with 3 times of speed to frame number successively.The frame number that can't differentiate high speed owing to human eye synthesizes rgb image.This instance only provides a kind of situation in the feasible program, and the other light sources arrangement does not break away from the spirit of this instance yet.
On the basis of Fig. 1, combine Fig. 2 and Fig. 3 to come each primary lights of illustrated in detail below again from light source 2s separately, how reflection and transmission in light regime module 3 and image modulation module 4 arrives projection lens 5 at last.
Fig. 2 has provided the ray trajectory and the polarization state of red light beam 212 and blue light light beam 232.From the red laser beam expanding reshaper 211 of ruddiness process that red laser instrument 21 sends, pass through red anti-blue optical filter 321 and get into a PBS 31 with broadband quarter-wave plate 331 backs.The blue light that sends from blue laser instrument 23 through blue laser beam expanding reshaper 231 with pass through blue anti-red green optical filter 323 backs and get into a PBS 31.Because the high polarization characteristic that LASER Light Source had, it is the P polarization state that ruddiness can be set, and blue light is the S polarization state.The ruddiness 212 of P polarization directly sees through a PBS 31 and gets into the subsequent optical system.The blue light of S polarization state sees through broadband quarter-wave plate 331 after PBS reflection, passed through and pass through broadband quarter-wave plate 331 once more after red anti-blue optical filter 321 reflects.Twice of the blue light of S polarization state gets into the subsequent optical system through becoming the P polarization behind the broadband quarter-wave plate 331 from a PBS 31 transmissions.
Ray trajectory and the polarization state of the green beam 222 that Fig. 3 has provided.The green glow that green light LED 22 sends gets into a PBS through green glow light uniforming device 221 and the second broadband quarter-wave plate, 332 backs.Green glow is decomposed into mutually orthogonal light beam S and P by a PBS 31.S light is directly reflected away, and P light passes through to blue-ray LED 23, passes through blue anti-red green optical filter 323 with the former road of green glow reflected back, behind a PBS 31 and the second broadband quarter-wave plate 331, turns back to green light LED 22.Through behind the source reflection, the green glow of P polarization is once more through the second broadband quarter-wave plate 331.The green glow of P polarization passes through the second broadband quarter-wave plate 331 twice, and its polarization state becomes S light from P light, is reflexed to the subsequent optical system by a PBS 31.Therefore; The S polarized green light of outgoing can be regarded two parts as; A part is the part that directly reflects through a PBS 31, and another part is original P polarization, through passing through the part that blue anti-red green optical filter 323 and the second broadband quarter-wave plate, 332 polarization conversion reuse.
This shows that from a PBS 31 outgoing, it is different reaching polarization interference optical filter 33 preceding three primary colours polarization states through collector lens 32.Ruddiness 212 is the P polarization state with blue light 232, and green glow 222 is the S polarization state.Therefore, must adopt polarization interference optical filter 33, the three primary colours polarization state of light is integrated into same polarization state with selective spectral polarization revolving property.According to the light engine arrangement of this instance, polarization interference optical filter 33 should revolve green glow 222 becomes P light from S light after turning 90 degrees, and ruddiness 212 then keeps the P polarization state constant with blue light 232.After 33 pairs of three primary colours polarizations integration of polarization interference optical filter, the three primary colours light that incides the 2nd PBS 34 is the P polarization state.In order to improve the contrast of system, also can before the 2nd PBS 34, add and remove the polaroid (not shown).The three primary colours light of P polarization by the 2nd PBS 34 transmissions after, get into image modulation module 4.Image modulation module 4 becomes the S polarization with three primary colours light from the P optical rotation successively according to the picture signal of input, after the 2nd PBS 34 reflections, enters into projection lens 5.
Merit attention, can make various modifications to satisfy various demands for the projection optical system 1 of the utility model.For example, can change the kind and the relative position of LED and laser, adopt different primary filters to realize the light path integration.Corresponding, the selective spectral deflection characteristic of polarization interference optical filter also should be according to the variation of light source position and design again.Adopt business-like red laser and blue laser in this instance, usefulness is higher and cost is lower.And for not business-like green laser, the green light LED that then adopts green light LED or fluorescent powder to excite is to reduce the cost of total system.In addition, the spectral bandwidth of green glow polarization interference optical filter is also moderate, promptly color aliasing can not occur, can not reveal other primary colours again, and it is optimum that system configuration reaches.
Fig. 4 has provided second embodiment of the utility model.Compare with first embodiment; The difference of present embodiment be light source module 2 by blue laser 23 and 25, blue light expand bundle reshaper 231, pass through blue anti-green optical filter 324, green glow fluorescent plate 325, green glow expand bundle reshaper 251, red-light LED 24 and ruddiness light uniforming device 241 and form, throw light on for system provides the three primary colours of mixing.Polarization close color element by a PBS 31, pass through red anti-blue optical filter 321, broadband quarter-wave plate 331, the second broadband quarter-wave plate 332 and pass through blue anti-red green quarter-wave plate 323 and form.Adopt blue laser excitation green light fluorescent powder to produce the mode of green glow, can promote the maximum green glow brightness of proportion in the projection, help promoting complete machine brightness.
The broadband quarter-wave plate 331 and the second broadband quarter-wave plate 332 are glued at the ruddiness plane of incidence and the green glow plane of incidence of a PBS 31 respectively; The broadband quarter-wave plate 331 of the ruddiness plane of incidence again with pass through red anti-blue optical filter 321 and glue together mutually, pass through the blue light plane of incidence that blue anti-red green optical filter 323 is glued at a PBS 31.Pass through the ruddiness 212 that red anti-blue optical filter 321 transmit red light LED 24 send, and the blue light 232 that reflection is sent from blue laser instrument 23.Pass through the blue light 232 that the blue laser instrument 23 of blue anti-red green optical filter 323 transmissions sends, and the green glow 222 that the ruddiness 212 that reflection is sent from red-light LED 24 and blue laser instrument 25 excitated fluorescent powders produce.
Fig. 5 has provided ray trajectory and the polarization state of red light beam 212 among second embodiment.From the ruddiness process ruddiness light uniforming device 241 that red-light LED 24 sends, pass through red anti-blue optical filter 321 and get into a PBS 31 with broadband quarter-wave plate 331 backs.Ruddiness is decomposed into mutually orthogonal light beam S and P by a PBS 31.The direct transmission of P light is gone out, and S light is reflected to blue-ray LED 23, passes through blue anti-red green optical filter 324 the former road of ruddiness is reflected back, and sees through broadband quarter-wave plate 331 and passes through the red blue optical filter 321 that returns, and turns back to red-light LED 21.Through behind the source reflection, the ruddiness of S polarization is once more through passing through red anti-blue optical filter 321 and broadband quarter-wave plate 331.Twice of the ruddiness of S polarization is through behind the broadband quarter-wave plate 331, and its polarization state becomes P light from S light, from a PBS 31 transmissions, and with before directly the P polarized red beam of outgoing merge.Therefore; The P polarized red beam of outgoing can be regarded two parts as; A part is the part through a PBS 31 direct transmissions, and another part is original S polarization, through broadband quarter-wave plate 331 and the part of passing through blue anti-red green optical filter 324 polarization conversion recycling.
Fig. 6 has provided ray trajectory and the polarization state of green glow 222 among second embodiment.Blue laser instrument 25 shines on green glow fluorescent plate 325 after seeing through blue anti-green optical filter 324 earlier, and green light fluorescent powder is produced green glow by blue laser excitation, after expanding the bundle shaping device 251 and the second broadband quarter-wave plate 332, gets into a PBS.Blue laser 25 itself has high-polarization, but the green glow 222 that excitated fluorescent powder produces, its polarization state has certain influence.Wherein the green glow of S polarization directly reflects away through a PBS; And light transmission the one PBS 31 transmissions of P polarization are to blue laser instrument 23; Pass through blue anti-red green optical filter 323 with the former road of green glow reflected back; See through the second broadband quarter-wave plate 332, green glow expands bundle reshaper 251 and green glow fluorescent plate 325, arrives to pass through blue anti-green optical filter 324.Pass through blue anti-green optical filter 324 the former road of green glow is returned, see through green glow fluorescent plate 325 successively, green glow expands the bundle reshaper 251 and the second broadband quarter-wave plate 332.After the green glow of P polarization passes through the second broadband quarter-wave plate 332 twice, its polarization state will become S light from P light, reflected away by a PBS, and merge with the S polarized green light that directly reflects away before.Therefore; The S polarized green light of outgoing can be regarded two parts as; A part is the part that directly reflects through a PBS 31; Another part is original P polarization, through passing through blue anti-green optical filter 325, the second broadband quarter-wave plates 332 and the part of passing through blue anti-red green optical filter 323 polarization conversion recycling.
Fig. 7 has provided ray trajectory and the polarization state of blue light light beam 232 among second embodiment.From the blue laser beam expanding reshaper 231 of blue light 232 processes that blue laser instrument 23 sends, pass through blue anti-red green optical filter 323 back entering the one PBS 31.Because the high polarization characteristic that laser had, it is the S polarization state that blue light can be set.The blue light 232 of S polarization reflects to red-light LED 21 through a PBS 31.Red anti-blue optical filter 321 is passed through in 331 arrival through the broadband quarter-wave plate.Pass through red anti-blue optical filter 321 reflect blue, blue light passes through broadband quarter-wave plate 331 once more.Twice of the blue light of S polarization state gets into the subsequent optical system through becoming the P polarization behind the broadband quarter-wave plate 331 from a PBS 31 transmissions.
Fig. 8 has provided the 3rd embodiment of the utility model.With respect to second embodiment, present embodiment adopts red laser instrument 21 and red laser beam expanding reshaper 211 to substitute red-light LED 24 and ruddiness light uniforming device 241.With respect to embodiment 3, the ruddiness brightness meeting in the present embodiment further promotes, thereby complete machine brightness gets a promotion, but is increased and the speckle phenomena that causes can be apparent in view by the laser composition.In the present embodiment, because blue light part partly remains unchanged with green glow, so ray trajectory and polarization state such as Fig. 6 and shown in Figure 7 of blue light 232 and green glow 222.
Fig. 9 has provided the track route of red light beam 212 among the 3rd embodiment.The light that sends from red laser instrument 21 passes through red anti-blue optical filter 321 and broadband quarter-wave plate 331 through behind the red laser beam expanding reshaper 211, gets into a PBS 32.Because the high polarization characteristic that LASER Light Source had, it is the P polarization state that ruddiness can be set.The ruddiness 212 of P polarization sees through a PBS 31 and directly gets into the subsequent optical system.
Though described the various characteristics and the advantage of the utility model with reference to said embodiment, it will be understood to those of skill in the art that can be to the shape of its parts, size and layout etc. is made change, and can not break away from the spirit and the scope of the utility model.In the instance,, also can use other similar and suitable substitute though shown concrete component type.Therefore, more than describe the example embodiment that is intended to provide the utility model, and the utility model scope does not receive the restriction of this concrete example that provides.
Claims (3)
1. compact crystal projection light engine systems that adopts hybrid light source; It comprises light source module (2); Polarized light management module (3); Image information module (4) and projection lens (5), light regime module (3) by polarization close color element, collector lens (32), polarization interference optical filter (33), the 2nd PBS (34) successively arranged in co-axial alignment form; It is characterized in that; Said light source module (2) comprises red laser instrument (21), green light LED (22), blue laser instrument (23), red laser beam expanding reshaper (211), green glow light uniforming device (221) and blue laser beam expanding reshaper (231), and green light LED (22) links to each other with green glow light uniforming device (221); Polarization close color element by a PBS (31), pass through red anti-blue optical filter (321), pass through blue anti-red green optical filter (323), broadband quarter-wave plate (331) and the second broadband quarter-wave plate (332) and form; The ruddiness of the P polarization state that red laser instrument (21) sends directly transmits a PBS (31) after passing through red anti-blue optical filter (321) and broadband quarter-wave plate (331) entering the one PBS (31) successively; The green glow that green light LED (22) sends sees through the second broadband quarter-wave plate (332) back and gets into a PBS (31); The light of S polarization state is directly reflected away by a PBS (31); Light transmission the one PBS (31) of P polarization state; After passing through blue anti-red green optical filter (323) reflection, get into green light LED (22) through a PBS (31) and the second broadband quarter-wave plate (332) successively again; Seen through the second broadband quarter-wave plate (332) after green light LED (22) reflection once more, the light that becomes the S polarization state reflects away from a PBS (31); The blue light of the S polarization state that blue laser instrument (23) sends is through after blue anti-red green optical filter (323) gets into a PBS (31) thoroughly; Reflect by a PBS (31); See through broadband quarter-wave plate (331); After passing through red anti-blue optical filter (321) reflection, see through the light that broadband quarter-wave plate (331) becomes the P polarization state once more, go out from a PBS (31) transmission; After the light that comes out from a PBS (31) sees through collector lens (32), polarization interference optical filter (33) and the 2nd PBS (34) successively; By image information module (4) reflected back the 2nd PBS (34), reflex to projection lens (5) by the 2nd PBS (34) again.
2. compact crystal projection light engine systems that adopts hybrid light source; It comprises light source module (2); Polarized light management module (3); Image information module (4) and projection lens (5), light regime module (3) by polarization close color element, collector lens (32), polarization interference optical filter (33), the 2nd PBS (34) successively arranged in co-axial alignment form; It is characterized in that; Said light source module (2) comprises red-light LED (24), blue laser instrument (23), the second blue laser instrument (25), ruddiness light uniforming device (241), blue laser beam expanding reshaper (231), passes through blue anti-green optical filter (324), green glow fluorescent plate (325) and green laser beam expanding reshaper (251), and red-light LED (24) links to each other with ruddiness light uniforming device (241); Polarization close color element by a PBS (31), pass through red anti-blue optical filter (321), pass through blue anti-red green optical filter (323), broadband quarter-wave plate (331) and the second broadband quarter-wave plate (332) and form; After the ruddiness that red-light LED (21) sends passes through red anti-blue optical filter (321) and broadband quarter-wave plate (331) entering the one PBS (31) successively; The direct transmission of the light of P polarization state is gone out; The light of S polarization state successively through a PBS (31), pass through blue anti-red green optical filter (323) and reflect with a PBS (31) after; See through broadband quarter-wave plate (331) and pass through red anti-blue optical filter (321) and get into red-light LED (21); Passed through red anti-blue optical filter (321) and broadband quarter-wave plate (331) once more after red-light LED (21) reflection, the light that becomes the P polarization state is gone out from a PBS (31) transmission; The blue light of the S polarization state that the second blue laser instrument (25) sends excites green glow fluorescent plate (325) to produce green glow after seeing through and passing through blue anti-green optical filter (324); After the shaping of green laser beam expanding reshaper (251) expansion bundle gets into a PBS (31); The light of S polarization state is directly reflected away by a PBS (31); Light transmission the one PBS (31) of P polarization state is passed through blue anti-red green optical filter (323) reflection; See through a PBS (31), the second broadband quarter-wave plate (332), green laser beam expanding reshaper (251) and green glow fluorescent plate (325) successively; After being passed through blue anti-green optical filter (324) reflection, successively through the light that becomes the S polarization state behind green glow fluorescent plate (325), green laser beam expanding reshaper (251) and the second broadband quarter-wave plate (332), reflected away again by a PBS (31).
3. compact crystal projection light engine systems that adopts hybrid light source; It comprises light source module (2); Polarized light management module (3); Image information module (4) and projection lens (5), light regime module (3) by polarization close color element, collector lens (32, polarization interference optical filter (33), the 2nd PBS (34) successively arranged in co-axial alignment form; It is characterized in that said light source module (2) comprises red laser instrument (21), blue laser instrument (23), the second blue laser instrument (25), red laser beam expanding reshaper (211), blue laser beam expanding reshaper (231), passes through blue anti-green optical filter (324), green glow fluorescent plate (325) and green laser beam expanding reshaper (251); Polarization close color element by a PBS (31), pass through red anti-blue optical filter (321), pass through blue anti-red green optical filter (323), broadband quarter-wave plate (331) is organized with the second broadband quarter-wave plate (332); The ruddiness of the P polarization state that red laser instrument (21) sends sees through red laser beam expanding reshaper (211) successively, pass through red anti-blue optical filter (321) gets into the direct transmission in a PBS (31) back with broadband quarter-wave plate (331) and goes out; The blue light of the S polarization state that the second blue laser instrument (25) sends excites green glow fluorescent plate (325) to produce green glow after seeing through and passing through blue anti-green optical filter (324); After the shaping of green laser beam expanding reshaper (251) expansion bundle gets into a PBS (31); The light of S polarization state is directly reflected away by a PBS (31); Light transmission the one PBS (31) of P polarization state is passed through blue anti-red green optical filter (323) reflection; See through a PBS (31), the second broadband quarter-wave plate (332), green laser beam expanding reshaper (251) and green glow fluorescent plate (325) successively; After being passed through blue anti-green optical filter (324) reflection, successively through the light that becomes the S polarization state behind green glow fluorescent plate (325), green laser beam expanding reshaper (251) and the second broadband quarter-wave plate (332), reflected away again by a PBS (31).
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| CN 201220169512 CN202583682U (en) | 2012-04-20 | 2012-04-20 | Compact liquid-crystal projecting-light-engine system adopting mixing light source |
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| CN 201220169512 CN202583682U (en) | 2012-04-20 | 2012-04-20 | Compact liquid-crystal projecting-light-engine system adopting mixing light source |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102621789A (en) * | 2012-04-20 | 2012-08-01 | 杭州研明光电技术有限公司 | Compact liquid crystal projection light engine system using mixed light source |
| CN103424969A (en) * | 2012-05-21 | 2013-12-04 | 台达电子工业股份有限公司 | Light source system |
| CN103747221A (en) * | 2013-12-31 | 2014-04-23 | 苏州佳世达光电有限公司 | Laser projection equipment |
| CN103777362A (en) * | 2013-12-31 | 2014-05-07 | 苏州佳世达光电有限公司 | Laser projection equipment |
| CN107589546A (en) * | 2017-10-23 | 2018-01-16 | 北京小米移动软件有限公司 | Optical system and augmented reality glasses |
| CN111722464A (en) * | 2019-03-20 | 2020-09-29 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN111982471A (en) * | 2020-08-17 | 2020-11-24 | 桂林电子科技大学 | Method for detecting optical filter bandwidth based on spatial modulation polarization imaging system |
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- 2012-04-20 CN CN 201220169512 patent/CN202583682U/en not_active Withdrawn - After Issue
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102621789B (en) * | 2012-04-20 | 2014-06-18 | 杭州研明光电技术有限公司 | Compact liquid crystal projection light engine system using mixed light source |
| CN102621789A (en) * | 2012-04-20 | 2012-08-01 | 杭州研明光电技术有限公司 | Compact liquid crystal projection light engine system using mixed light source |
| CN103424969A (en) * | 2012-05-21 | 2013-12-04 | 台达电子工业股份有限公司 | Light source system |
| CN103424969B (en) * | 2012-05-21 | 2015-08-19 | 台达电子工业股份有限公司 | Light-source system |
| CN103747221B (en) * | 2013-12-31 | 2016-04-06 | 苏州佳世达光电有限公司 | Laser projection device |
| CN103777362A (en) * | 2013-12-31 | 2014-05-07 | 苏州佳世达光电有限公司 | Laser projection equipment |
| CN103747221A (en) * | 2013-12-31 | 2014-04-23 | 苏州佳世达光电有限公司 | Laser projection equipment |
| CN107589546A (en) * | 2017-10-23 | 2018-01-16 | 北京小米移动软件有限公司 | Optical system and augmented reality glasses |
| CN107589546B (en) * | 2017-10-23 | 2024-05-24 | 北京小米移动软件有限公司 | Optical system and augmented reality glasses |
| CN111722464A (en) * | 2019-03-20 | 2020-09-29 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN111722464B (en) * | 2019-03-20 | 2022-11-29 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN111982471A (en) * | 2020-08-17 | 2020-11-24 | 桂林电子科技大学 | Method for detecting optical filter bandwidth based on spatial modulation polarization imaging system |
| CN111982471B (en) * | 2020-08-17 | 2022-08-26 | 桂林电子科技大学 | Method for detecting optical filter bandwidth based on spatial modulation polarization imaging system |
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