CN201163802Y - Novel colorful laser projection display device - Google Patents
Novel colorful laser projection display device Download PDFInfo
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- CN201163802Y CN201163802Y CNU2007201991100U CN200720199110U CN201163802Y CN 201163802 Y CN201163802 Y CN 201163802Y CN U2007201991100 U CNU2007201991100 U CN U2007201991100U CN 200720199110 U CN200720199110 U CN 200720199110U CN 201163802 Y CN201163802 Y CN 201163802Y
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Abstract
The utility model discloses a novel color laser projection display device, which belongs to the laser display technical field. The novel color laser projection display device comprises a laser source module, a polarizing dispersion prism, a dispersive beam splitting and combining element, a micro-display device, a projection lens and a scanning tilting mirror. Linear red, green and blue trichromatic laser beams outputted by the laser source module are respectively modulated by the micro-display device, projected to the scanning tilting mirror and then scanned to form a picture. Due to adoption of the linear light beam scanning proposal and utilization of the dispersive beam splitting and combining element to perform beam splitting on red, green and blue trichromatic lasers which are then respectively modulated and combined, the color separation sequence modulation design proposal is not required to be adopted. Compared with the prior projection technical proposal, the novel color laser projection display device simplifies the system design, does not require modulating a laser, improves the utilization rate of laser source, and strengthens the luminance of the projection picture.
Description
Technical field
The utility model relates to projection display apparatus, and more particularly, relating to employing red, green, blue laser is light source, and the colorful laser projection display device of while usage space optical modulator and line sweep scheme.
Background technology
What the tradition projection display apparatus generally adopted is light sources such as metal halogen bulb, UHE (Ultra high efficiency) bulb, UHP (Ultra high performance) bulb.Its common drawback is that electro-optical efficiency is low, the life-span is short, cost is higher, and after operation several thousand hours, brightness will seriously decay usually; Because technology limitation, adopting bulb is that light source also causes present optical projection system volume bigger than normal.Simultaneously, because the restriction of bulb luminescence mechanism makes the gamut range of its imaging less, can't realize color rendition more true to nature.
In addition, adopt the projection display system of LED light source at present in addition, as authorizing the United States Patent (USP) 7101049 of Shindoh on September 5th, 2006, title is " projecting apparatus optics and the projecting apparatus that adopts led light source ".Compare the conventional bulb light source, adopt LED as projector light source, it is advantageous that: efficient height, life-span prolong greatly, and volume is little, and response speed is fast, do not have ultraviolet or infrared radiation.But at present LED does not also reach the desired high brightness of large scale rear-projection TV and projecting apparatus, thus led light source mainly to be positioned overall dimension little and need not the application that high brightness is exported.
And LASER Light Source, especially semiconductor laser LD, it is little to have a volume, electrical efficiency height, advantage such as batch cost is low; Compare incoherent light sources such as bulb and LED, laser has improved the efficiency of light energy utilization because spectrum is purer, is easy to realize high brightness output; And by selecting suitable three primary colors wavelength, can obtain wider colour gamut, realize real more color rendition.
The mode that laser light projection display system forms two dimensional image comprises: the face battle array spatial light modulator SLM that the conventional bulb optical projection system has extensively adopted, laser beam two dimension point by point scanning and space of lines optical modulator are in conjunction with one-dimensional scanning etc.
The face battle array spatial light modulator that adopts mainly comprises: Digital Micromirror Device DMD, liquid crystal device LCD and silicon-based liquid crystal device LCOS (liquid crystal on silicon).Its common feature is: by the two-dimensional array that many minute light valves elements are formed, and a pixel of the corresponding two dimensional image of each element, and can independent addressing, thus realize digital modulation to light source.
DMD and LCD be as widely used spatial light modulator, also obtained application in laser is the projection display system of light source.For example in the United States Patent (USP) 6385309 of authorizing people such as Sang-whoe Doh, just introduced employing DMD device as the spatial light modulator laser projection system, title is " optically coupled device and a manufacture method thereof, and the optical instrument that utilizes this device "; In the United States Patent (USP) 7128420 of authorizing people such as Kapellner, having introduced employing laser is light source, and LCD is as the projection display system of spatial light modulator, and title is " image projection device and a method ".
The LCOS device belongs to the liquid crystal reflective micro-projector spare on the novel silicon base chip.Than LCD, DMD, LCOS shadow casting technique have light utilization efficiency height, response time short, be easy to realize advantage such as high-res.At present, the laser projection system that adopts the LCOS micro-display device has been arranged, for example authorized people's such as Kruschwitz United States Patent (USP) 6594090 on July 15th, 2003, title is " laser light projection display system ".
Be different from the optical projection system that traditional bulb is a light source, laser projection system can also adopt the mode of two-dimentional point by point scanning to realize, for example authorized people's such as Mick sieve De Stein grace Chinese patent CN1998243A on July 11st, 2007, title is " color laser projection display ".Adopt scan mode realization laser projection and need not the usage space optical modulator, but the modulating frequency of redgreenblue laser is had relatively high expectations.Because the laser beam that is adopted during scanning is more much smaller than the laser facula of the optical projection system of employing face battle array spatial light modulator, three looks swash the combiner adjustment and require than higher.
Except that face battle array spatial light modulator, the linear array spatial light modulator has also obtained application in laser projection display device, for example authorized people's such as Bloom United States Patent (USP) 5311360 on May 10th, 1994, title is " method and apparatus of modulated beam of light ", has described grating light valve GLV (Grating Light Valve) linear array device; Authorize in October 23 calendar year 2001 in people's such as Kowarz the United States Patent (USP) 6307663 that is entitled as " spatial light modulator ", describe another kind of linear array spatial light modulation GEMS (GratingElectro Mechanical System) with conformal grating device.Utilize above-mentioned device, can modulate linear laser Shu Jinhang, Line beam scanning after the modulation forms two dimensional image, for example authorized people's such as Kowarz United States Patent (USP) 6552855 on April 22nd, 2003, title is " image formation system with high tonal gradation ", has just showed the laser projection system that utilizes a plurality of GEMS devices; Authorized people's such as Ikeda United States Patent (USP) 7016099 on March 21st, 2006, title is " MEMS device, GLV device and laser display ", has showed and has adopted three GLV respectively as the laser projection system of the spatial light modulator of red, green, blue three look laser.
Compare face battle array spatial light modulators such as LCD, DMD, the linear array spatial light modulator can simplified system design, and higher image analytic degree is provided; Compare two-dimentional point by point scanning scheme, reduced modulating frequency requirement, reduced the difficulty of three looks sharp combiners, the better pictures quality can be provided laser.But linear array spatial light modulators such as GLV, GEMS belong to MEMS (Micro-electromechanical System) device, and its cost is higher, and the efficiency of light energy utilization is lower; The pixel cell size of this type of device own is bigger simultaneously, causes device volume bigger than normal, more is applicable to the optical projection system that profile is bigger, is unfavorable for controlling the optical projection system volume.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of simple in structure, laser projection display device of being easy to realize.
The technical scheme that the utility model adopted is: a kind of new type colorful laser projection display device, comprise a laser light source module, a polarization splitting prism, a micro-display device, a chromatic dispersion beam split and close bundle element, one scan tilting mirror and at least one projecting lens, wherein: laser light source module produces the required red, green, blue three look laser beams of projection; Polarization splitting prism is arranged on laser light source module and chromatic dispersion beam split and closes between the bundle element, is used for controlling seeing through and reflection of light path laser beam; Chromatic dispersion beam split and close the bundle element, be arranged between polarization splitting prism and the micro-display device, red, green, blue three look laser beams from polarization splitting prism incident are carried out beam split, and make the three look laser beams that return through micro-display device modulation back reflection close bundle again, again by polarization splitting prism reflection or transmission; Micro-display device, to from the chromatic dispersion beam split and three look laser beams of incident after closing bundle element beam split modulate back reflection respectively; Projecting lens is arranged between polarization splitting prism and the scanning mirror, will project to scanning mirror through micro-display device modulation and the three look laser beams that reflected by polarization splitting prism; Scanning mirror will form image from the laser beam scanning of projecting lens incident.
Above-mentioned new type colorful laser projection display device, wherein, the chromatic dispersion beam split and close the bundle element be glass plate or dispersing prism.
Above-mentioned new type colorful laser projection display device, wherein, micro-display device is face formation spatial light modulator or the independently combination of three row two-dimensional surface formation spatial light modulators.
Advantage of the present utility model is, utilizes the mode of Line beam scanning to form two dimensional image, compares two-dimentional point by point scanning mode, has reduced the modulation requirement to laser, has reduced light beam and has closed the bundle required precision; Phase specific surface battle array display device has been simplified optics and circuit structure.
Another advantage of the present utility model is owing to adopted the chromatic dispersion beam split and closed the bundle element, the beam splitting of three look laser beams with modulate after close again bundle all thus element finish; Three look laser beams can be need not to adopt color separation sequential modulation design scheme by spatial light modulator while, modulation respectively by beam splitting in addition, have simplified design; Improve the light source utilance, increased projection brightness.
Description of drawings
Fig. 1 is the structural representation of new type colorful laser projection display device of the present utility model.
Fig. 2 is the structural representation of another execution mode of the utility model, in Fig. 2, has adopted the chromatic dispersion beam split different with Fig. 1 and has closed the bundle element.
Fig. 3 is the chromatic dispersion beam split of being adopted in the key diagram 2 and closes the schematic diagram of the operation principle of bundle element.
Fig. 4 illustrates the part light path schematic diagram when the utility model adopts a face formation LCOS device.
Fig. 5 is the part light path schematic diagram of explanation the utility model when adopting three to be listed as two-dimensional surface formation LCOS device independently.
Fig. 6 is the laser projection display device schematic diagram that illustrates when not adopting the chromatic dispersion beam split and closing the bundle element.
Embodiment
Below in conjunction with accompanying drawing embodiment according to laser projection display device of the present utility model is described in more detail.
Fig. 1 is a specific embodiment of the present utility model.As shown in the figure, new type colorful laser projection display device of the present utility model comprises a laser light source module 110, a polarization splitting prism 111, a chromatic dispersion beam split and closes bundle element 112, a micro-display device 113, a projecting lens 114 and one scan tilting mirror 115.Laser light source module 110, polarization splitting prism 111, chromatic dispersion beam split and close bundle element 112, micro-display device 113 and be arranged in order, polarization splitting prism 111 be arranged on laser light source module 110 and chromatic dispersion beam split and close the bundle element 112 between, the chromatic dispersion beam split and close the bundle element 112 be arranged between polarization splitting prism 111 and the micro-display device 113.Adopt in the present embodiment plate glass as the chromatic dispersion beam split and close the bundle element 112, the LCOS device is as micro-display device 113.The quantity of projecting lens 114 is not limited to one, also can be a plurality of.
Laser light source module 110 sends and closes red, green, blue three colo(u)r streak shape laser beams bundle and that the polarization direction is identical, whole transmissions in the time of on inciding polarization splitting prism 111.In the present embodiment, laser light source module 110 comprises red, green, blue three look lasers and relevant optical element, and red, green, blue three colo(u)r streak shape laser beams are shaped as the identical and uniform line spot of light distribution of size by relevant optical.When the laser beam that sees through polarization splitting prism 111 incides the chromatic dispersion beam split and closes on the bundle element 112, red, green, blue three look laser beams the chromatic dispersion beam split with close the exiting surface of restrainting element 112 and separate, the light beam keeping parallelism impinges perpendicularly on micro-display device 113.Three look laser beams are through micro-display device 113 modulation back reflections, through the chromatic dispersion beam split with close and restraint element 112 and close again and restraint into a branch of light, the light beam that also closes bundle through modulation again incides polarization splitting prism 111, polarization state according to the luminous point of corresponding micro-display device 113 pixels of three look laser beams this moment, three-beam is with some light intensity transmission, another part light intensity is reflected, reverberation incides scanning mirror 115 by projecting lens 114, scanning mirror 115 scans rotation at a certain angle, makes Line beam form two dimensional image on screen 116.Preferably, the angle of divergence of the light beam that penetrates from projecting lens 114 is identical with the scanning projection angle of scanning mirror 115.
In the embodiment shown in fig. 1, adopt plate glass as the chromatic dispersion beam split with close the bundle element.Because the abbe number of glass material is generally less,, need to use thicker plate glass in order to separate three look laser beams.Fig. 2 provides another specific embodiment of the present utility model, wherein, the chromatic dispersion beam split and close the bundle element 112 adopted the plate glass that is coated with optical thin film.Fig. 3 is the operation principle schematic diagram of this plate glass that is coated with optical thin film.As shown in the figure, be coated with optical thin film, make the repeatedly reflection in plate glass of red, green, blue three look laser beams in the shadow region 118 and 119 on the upper and lower surface of this plate glass; When three look laser beams during from the another side outgoing of plate glass, three look laser beams separate.Adopt chromatic dispersion beam split shown in Figure 3 and close the bundle element and can reduce thickness effectively.Chromatic dispersion beam split of the present utility model and close the bundle element 112 also can adopt dispersing prism or other to utilize dispersion characteristics to carry out the optical element of beam split.
Fig. 6 is the chromatic dispersion beam split in having simplified Fig. 1 and Fig. 2 and closes the laser projection display device schematic diagram of bundle behind the element 112.Owing to do not carry out beam split, the redgreenblue laser beam will be taked the mode of color separation sequential modulation.Its advantage is to have simplified system design, can reduced volume; Shortcoming is the requirement that has improved the LCOS micro-display device, needs the shorter response time.
Above disclosed specific embodiments be exemplary because the difference that can expect easily with those skilled in the art but the utility model is revised or put into practice to mode of equal value.Those skilled in the art will appreciate that under the situation that does not deviate from the defined spirit and scope of the present utility model of claim, can make on the various forms and details on variation.For example, those skilled in the art is very clear, and the chromatic dispersion beam splitter can also adopt forms such as dispersing prism.
Claims (5)
1. a new type colorful laser projection display device is characterized in that, comprise a laser light source module, a polarization splitting prism, a micro-display device, a chromatic dispersion beam split and close bundle element, one scan tilting mirror and at least one projecting lens, wherein:
Laser light source module produces the required red, green, blue three look laser beams of projection;
Polarization splitting prism is arranged on described laser light source module and described chromatic dispersion beam split and closes between the bundle element, is used for controlling seeing through and reflection of light path laser beam;
Chromatic dispersion beam split and close the bundle element, be arranged between described polarization splitting prism and the described micro-display device, red, green, blue three look laser beams from described polarization splitting prism incident are carried out beam split, and make the three look laser beams that return through described micro-display device modulation back reflection close bundle again, again by described polarization splitting prism reflection or transmission;
Micro-display device, to from described chromatic dispersion beam split and three look laser beams of incident after closing bundle element beam split modulate back reflection respectively;
Projecting lens is arranged between described polarization splitting prism and the described scanning mirror, will project to described scanning mirror through described micro-display device modulation and the three look laser beams that reflected by described polarization splitting prism;
Scanning mirror will form image from the laser beam scanning of described projecting lens incident.
2. new type colorful laser projection display device as claimed in claim 1 is characterized in that, described chromatic dispersion beam split and close the bundle element be glass plate or dispersing prism.
3. new type colorful laser projection display device as claimed in claim 1 is characterized in that, described micro-display device is the spatial light modulator of reflection-type.
4. new type colorful laser projection display device as claimed in claim 3 is characterized in that, described spatial light modulator is face formation spatial light modulator or the independently combination of three row two-dimensional surface formation spatial light modulators.
5. new type colorful laser projection display device as claimed in claim 1 is characterized in that, also comprises a screen, and the image projection that described scanning mirror scanning forms is on described screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201991100U CN201163802Y (en) | 2007-12-11 | 2007-12-11 | Novel colorful laser projection display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201991100U CN201163802Y (en) | 2007-12-11 | 2007-12-11 | Novel colorful laser projection display device |
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| CN201163802Y true CN201163802Y (en) | 2008-12-10 |
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| CNU2007201991100U Expired - Fee Related CN201163802Y (en) | 2007-12-11 | 2007-12-11 | Novel colorful laser projection display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202925B (en) * | 2007-12-11 | 2010-06-16 | 上海高意激光技术有限公司 | New type colorful laser projection display device |
| CN104808346A (en) * | 2014-12-09 | 2015-07-29 | 中国科学院上海技术物理研究所 | Linear dispersion combined prism optical splitter |
| WO2020135298A1 (en) * | 2018-12-29 | 2020-07-02 | 深圳光峰科技股份有限公司 | Projection system and projection method |
| CN113411565A (en) * | 2018-08-19 | 2021-09-17 | 安徽省东超科技有限公司 | Control method for interactive three-dimensional display based on photophoretic capture |
-
2007
- 2007-12-11 CN CNU2007201991100U patent/CN201163802Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202925B (en) * | 2007-12-11 | 2010-06-16 | 上海高意激光技术有限公司 | New type colorful laser projection display device |
| CN104808346A (en) * | 2014-12-09 | 2015-07-29 | 中国科学院上海技术物理研究所 | Linear dispersion combined prism optical splitter |
| CN104808346B (en) * | 2014-12-09 | 2017-08-15 | 中国科学院上海技术物理研究所 | A kind of linear dispersion combined prism light-splitting device |
| CN113411565A (en) * | 2018-08-19 | 2021-09-17 | 安徽省东超科技有限公司 | Control method for interactive three-dimensional display based on photophoretic capture |
| CN113411565B (en) * | 2018-08-19 | 2023-07-18 | 安徽省东超科技有限公司 | Control method for three-dimensional display of interactable body based on photo-phoresis capture |
| WO2020135298A1 (en) * | 2018-12-29 | 2020-07-02 | 深圳光峰科技股份有限公司 | Projection system and projection method |
| CN111385548A (en) * | 2018-12-29 | 2020-07-07 | 深圳光峰科技股份有限公司 | Projection system and projection method |
| CN111385548B (en) * | 2018-12-29 | 2021-12-07 | 深圳光峰科技股份有限公司 | Projection system and projection method |
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20111211 |