CN101430493A - Light source for projection system and projection display device - Google Patents
Light source for projection system and projection display device Download PDFInfo
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- CN101430493A CN101430493A CNA2007101937045A CN200710193704A CN101430493A CN 101430493 A CN101430493 A CN 101430493A CN A2007101937045 A CNA2007101937045 A CN A2007101937045A CN 200710193704 A CN200710193704 A CN 200710193704A CN 101430493 A CN101430493 A CN 101430493A
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Abstract
The invention provides a light supply apparatus with high brightness, high contrast and high color saturation and projection display equipment which are used for a projection system. The light supply apparatus comprises a supplemental light source and a laser light source, and also comprises a reflecting mirror which synthesizes light radiated by the supplemental light source and lasers radiated by the laser light source into a bunch. The reflecting mirror comprises a reflection part used for reflecting the light output by the supplemental light source and a laser hole which the lasers irradiated by the laser light source directly pass through. The invention skillfully leads the lasers of a laser device into the light bulb of the projection system and an LED illuminating source, can successfully adjust the intensity distribution of tricolor of red, green, and blue, increases the performance such as color saturation and contrast and the like, and has very high utility value in the projection display field.
Description
Technical field
The present invention relates to a kind of light supply apparatus and projection display equipment, particularly a kind of light supply apparatus and projection display equipment that is used for projection display system.
Background technology
The used ultrahigh pressure mercury lamp of existing optical projection system illumination, metal halide lamp, xenon lamp, Halogen lamp LED etc., the spectrum of these illuminating sources all is subjected to the restriction of luminescent substance and state thereof, presents continuously or the feature of band spectrum.Luminescent spectrum Fig. 1 with ultrahigh pressure mercury lamp is an example, the wave band broad of ruddiness as shown in the figure, and peak value is on the low side, and the red-green-blue intensity distributions is unsatisfactory, can't satisfy the requirement of white colour balance, therefore can't better meet the requirement of optical projection system illumination.Prior art adopts luminous flux and the brightness that the method for selection wide spectrum improves ruddiness usually at present, but adopts this kind method can correspondingly cause the reduction of color saturation.Simultaneously, prior art also is to be that cost increases red brightness to sacrifice contrast and color saturation on Video signal processing.So though these technology can be with softization of image color, the total quality of image has but descended.
In recent years, maturation along with led technology, also the someone attempts with light emitting diode as the optical projection system light source, the light emitting diode Projection Display is compared with traditional display technique, has bigger gamut range, and the light emitting diode live width is narrower, has high color saturation, can show that nature is true, gay colours.Lifetime of LED is long simultaneously, is a kind of environmental protection light source that does not have mercury.The light emitting diode Projection Display has become the significant development direction in demonstration field.
But, exist the total optical power deficiency on the low side that the effective luminous energy that utilizes of the system that can be projected is less, export because the optical extend of light emitting diode, has the led lighting technology now than big and the lower characteristic of brightness.
Although the luminous flux of light emitting diode and brightness are greatly improved, also do not reach the requirement of projector applications, the occasion that more particularly needs highlight illumination to use.In order to reach the requirement of projector applications, improve brightness of illumination, prior art is to lean on the permutation and combination of light emitting diode to improve luminous flux and brightness, but because light emitting diode is lambert's body illuminating source, if the optical extend of the LED source after the combination has exceeded the optical extend of optical projection system, this part light that exceeds then can not effectively be coupled into optical projection system.
The optical extend of light emitting diode is
E
Led＝n
2·π·sin
2(α)·S
Wherein n is the refractive index of luminescence medium; α is the emission half-angle of light source; S is the light-emitting area of light source.The emission half-angle of light emitting diode is 90 degree, and getting luminescence medium is air, and is 1 to do approximate treatment, 1mm with air refraction
2The light emitting diode (LED) light propagation is about 3.14mm
2Sr.
Be the optical projection system of 2.4 projection lens for the imager chip, the F number that use 0.79 inch, the optical extend of optical projection system is E
Projector=22mm
2Sr has only general 7mm
2The light of diode combinations array output can be coupled into optical projection system, the luminous flux sum that can make full use of only is a hundreds of lumen, greater than 7mm
2The light that sends of area can't be coupled into optical projection system at all, the way that improves luminous flux by the area that increases light emitting diode is impracticable.
In addition, traditional ultrahigh pressure mercury lamp can be at 6mm on the present market
2The luminous flux of the thousands of lumens of last generation, brightness is also high more than ten times than light emitting diode.Ultrahigh pressure mercury lamp is not a kind of light source of environmental protection owing to the use to heavy metal Hg.
In the LED source in the market, be the optical projection system of 2.4 projection lens for the imager chip, the F number that use 0.79 inch, light-emitting area is 7mm
2Certain light emitting diode, be subjected to the restriction of optical projection system optical extend, the maximum luminous power that can be coupled into the ruddiness of optical projection system is about 1.6W, the maximum luminous power of green glow is about 0.7W, the maximum luminous power of blue light is about 1.8W, and the ratio that ruddiness, green glow, blue light can be coupled into the maximum luminous power of optical projection system is 1:0.44:1.13.And colour temperature to be 6500K white require the luminous power ratio of ruddiness, green glow and the blue light of light emitting diode is 1:0.87:1.73.This shows that when light emitting diode ruddiness or blue light satisfied maximum luminous power, the luminous power of green glow all was not enough, green glow is the most not enough.Because the deficiency of green glow luminous power causes total optical power to be subjected to its restriction and on the low side, this is one of them not enough major reason of light emitting diode Projection Display brightness.Existing solution is to improve the duty ratio of time of green glow in whole white light to improve brightness, and this method does not make full use of the luminous power of ruddiness and blue light; Or adopting the luminous power that reduces ruddiness and blue light to obtain white balance, this method is again because the restriction of green glow luminous power has caused the luminous power of synthesize white light on the low side.
In a word, all there is difference on RGB luminous power ratio and white the demand in various Projection Display of the prior art with light source, thereby make color saturation, brightness and contrast that deficiency all be arranged, can't reach the resultant effect that improves color saturation, improves brightness, improves contrast and control cost simultaneously.
Summary of the invention
Therefore, task of the present invention provide a kind of use LASER Light Source as a supplement light source improve the light supply apparatus that is used for optical projection system of brightness, contrast and the color saturation of Projection Display image.
Another task of the present invention provides a kind of projection display equipment.
On the one hand, the invention provides a kind of light supply apparatus that is used for Projection Display, comprise by additional light source and LASER Light Source, comprise also being used for the light and the synthetic a branch of catoptron of described LASER Light Source emitted laser that are replenished light emitted with described that described catoptron comprises and is used to reflect the described laser hole that light source output reflection of light part and the laser that described LASER Light Source is sent directly pass through that replenished.
In the above-mentioned light supply apparatus, the surface, reflecting part of described catoptron is coated with increases the high-reflecting film that is replenished light source output beam reflection efficiency.
In the above-mentioned light supply apparatus, described reflecting part can be the plane, also can be designed to various shape as required, as paraboloidal, hyperboloid shape or sphere shape etc.
Can also be provided with beam alignment system between described LASER Light Source and the described catoptron.
Further, described beam alignment system can comprise optical fiber and the coupling mirror that is used for described laser coupled is advanced described optical fiber, can also comprise extender lens and condenser lens etc.
In the above-mentioned light supply apparatus, describedly comprised various projection light sources, as LED lamp, ultrahigh pressure mercury lamp, metal halide lamp, xenon lamp and Halogen lamp LED etc. by additional light source.
On the other hand, the present invention also provides a kind of projection arrangement, and described projection arrangement uses the light source of above-mentioned light supply apparatus as Projection Display.
The present invention introduces the bulb and the LED illuminating source of optical projection system dexterously with the laser of laser instrument, has proposed a kind of laser and other light sources and has mixed idea as the optical projection system lighting source.
Take technique scheme, can successfully remedy the red illumination defect of insufficient of bulbs such as ultrahigh pressure mercury lamp, metal halide lamp, xenon lamp, Halogen lamp LED, improved ruddiness brightness, adjusted the intensity distributions of red-green-blue, improved performances such as color saturation and contrast, had very high practical value in field of projection display.
Take technique scheme, can also utilize high brightness, the less laser of optical extend to replenish low-light level, LED source that optical extend is bigger, not only improved the luminous power of light emitting diode, improve the effective rate of utilization of light-source brightness and luminous energy significantly, and successfully solved the not enough defective that is not fully utilized or wastes with the ruddiness blue light of light emitting diode illuminated with green.In addition, the present invention has the characteristics of wide colour gamut, long-life, no mercury environmental protection simultaneously, and has both relatively inexpensive advantage, has very high practical value in field of projection display.
Description of drawings
Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the synoptic diagram of the luminescent spectrum of ultrahigh pressure mercury lamp;
Fig. 2 is the plan structure synoptic diagram of catoptron;
Fig. 3 is to use the laser that is used for Projection Display of catoptron to replenish the light supply apparatus synoptic diagram of bulb;
Fig. 4 is with laser and the mixed spectrogram of ultrahigh pressure mercury lamp;
Fig. 5 is the light supply apparatus synoptic diagram that laser and light emitting diode mix;
Fig. 6 and Fig. 7 are that two kinds of three-primary color LED lamps swash the synoptic diagram of combiner as the Projection Display light source with RGB respectively;
Fig. 8 is the synoptic diagram that uses a kind of projector light path of light supply apparatus of the present invention in monolithic DLP;
Fig. 9 is the synoptic diagram that uses a kind of projector light path of light supply apparatus of the present invention in three DLP;
Figure 10 is to use three-primary color LED lamp of apparatus of the present invention and RGB to swash the synoptic diagram of combiner as a kind of projector light path of the monolithic DLP of Projection Display light source;
Figure 11 is to use the synoptic diagram of the another kind of projector light path of three-primary color LED lamp of apparatus of the present invention and the monolithic DLP that one-wavelength laser closes Shu Zuowei Projection Display light source;
Figure 12 is to use the synoptic diagram of a kind of projector light path of the three-primary color LED lamp of apparatus of the present invention and three LCD that one-wavelength laser closes Shu Zuowei Projection Display light source;
Figure 13 is to use the three-primary color LED lamp of apparatus of the present invention and the sharp combiner synoptic diagram as a kind of projector light path of three LCOS of Projection Display light source.
Embodiment
Because the hot spot and the angle of divergence of laser are all very little, so the optical extend of laser is very little.Determine by following formula from the optical extend of the laser of optical fiber output:
E
laser＝π
2r
2sin
2θ
Wherein, r is the radius of fibre bundle, and sin θ is the numerical aperture of optical fiber.Fibre bundle closes Shu Ercheng by one or multifiber.
For example, be 0.35mm for the fibre bundle radius, numerical aperture is that the optical extend of 0.22 fibre bundle output laser only is 5.22 * 10
-2Mm
2Sr and light emitting diode are compared and are wanted little 2 more than the order of magnitude.Luminous flux under this optical extend can reach thousands of to lumens up to ten thousand.Therefore, for laser, very little optical extend just can obtain high luminous flux output.
In the hybrid light source of certain light emitting diode and laser, the optical extend of setting light emitting diode is E
Led, the optical extend of laser is E
Laser, total optical extend of hybrid light source is E
Total, total optical extend of hybrid light source is the summation of the optical extend and the laser optics propagation of light emitting diode, if E
Total=E
Led+ E
Laser≤ E
Projector, then the luminous power of this hybrid light source can all be coupled into optical projection system effectively at this moment.Because E
LaserAnd E
LedCompare much smaller, almost can ignore, therefore, can allow the overwhelming majority of optical extend of this hybrid light source distribute to light emitting diode, purpose is to utilize the luminous energy of the comparatively cheap light emitting diode of cost as much as possible, and few part of the optical extend of hybrid light source is distributed to laser, utilize laser under very little optical extend, just can obtain the characteristic of high brightness, thereby improved the total brightness of hybrid light source.
Fig. 2 is the plan structure synoptic diagram of catoptron.This catoptron comprise be used to reflect described by additional light source output reflection of light part 1 with make described LASER Light Source send the laser hole 2 that laser directly passes through.The reflecting part 1 of catoptron can also be coated with increases the high-reflecting film that is replenished light source output beam reflection efficiency.According to the needs that reality is used, this catoptron can also can be designed to various shape, as paraboloidal, hyperboloid shape or sphere shape etc. as required for various flat shapes such as disc, rectangle, plate shaped, bar shapeds.Described laser hole 2 can be positioned at the central authorities of catoptron, perhaps changes other positions into according to different needs.
The laser that is used for Projection Display shown in Figure 3 replenishes the light supply apparatus of bulb, comprises LASER Light Source 302, condenser lens 303, bulb 301 and catoptron 304; Wherein, LASER Light Source 302 is a red laser, and catoptron 304 is circular slab construction, and the centre of catoptron 304 is that diameter is 3 millimeters a laser hole 305, and the remainder of catoptron 304 is the reflecting part, and the reflecting part is coated with the broadband high-reflecting film of visible light.Directly export by the laser hole 305 of catoptron 304 red laser 302 emitted laser bundle line focus lens 303 backs; The light beam that described bulb 301 sends is then directly exported on same direction by the laser beam of laser hole 305 with described through reflection back, catoptron 304 reflecting parts, thereby realizes mixing, and the optical axis coincidence of two kinds of light in the mixed light, thereby the benefit of realization ruddiness is gone into.Condenser lens 303 can also use focus lens group or other can realize the optical component of focussing force.Can increase extender lens in the focus lens group, increase the degree of divergence of laser,, and then can make mixed effect the best with laser beam is coaxial after the beam reflection of bulb because the effect that the laser versus lamp bubble of dispersing with certain angle of divergence mixes can be better.Described laser instrument 302 can be solid state laser, also can be semiconductor laser, fiber laser, gas laser etc.The red laser that described laser instrument 302 is selected for use selects 630nm better to the wavelength of 670nm.And the bulb here also can be ultrahigh pressure mercury lamp, metal halide lamp, Halogen lamp LED and xenon lamp.Influence for 305 pairs of bulb 301 output beams of laser hole of reducing catoptron, simultaneously the laser of whole incidents is passed through, condenser lens 303 should make the focus of laser be in the surface or near the position of the laser hole 305 of catoptron 304 as far as possible, so just might the area that the laser hole of catoptron 304 is made is littler, to reduce the influence of laser hole, increase the light of bulb reflection to the reflection of bulb output light.Mixed spectrum synoptic diagram as shown in Figure 4.Fig. 4 and Fig. 1 as seen, in the distribution of RGB three primary colours, the intensity of ruddiness obviously improves, and meets the needs of white luminous intensity distribution preferably.
In this light supply apparatus, the laser hole 305 of described catoptron 304 can be located in the middle of the catoptron, also can be located at other suitable positions, and the thickness of catoptron can be very little, can be various flat shapes such as disc, rectangle, plate shaped, bar shaped, also can be designed to various shape as required, as paraboloidal, hyperboloid shape or sphere shape etc.
Fig. 5 mixes the light supply apparatus that carries out Projection Display as the LED source of being replenished light source with LASER Light Source.Wherein, the structure of catoptron 503 is identical with Fig. 2, and LED source 501 is a white light emitting diode, institute is luminous by behind the light-beam forming unit 502, the light angle of divergence of lambert's bodily form formula is compressed, and the angle of divergence after the compression is the aperture angle of optical projection system, for example ± 12 °; The emergent light of light-beam forming unit 502 is through the reflecting part reflection back output of catoptron 503, and the reflecting part of catoptron 503 is coated with visible light broadband high-reflecting film; LASER Light Source 507 is a green (light) laser, and institute's emitted laser enters optical fiber 505 by coupled lens group 506, and the emergent light of optical fiber 505 focuses on by focus lens group 504, and its angle of divergence is controlled in the aperture angle of optical projection system.Adjust light path, make the focus of laser beam be in the laser hole place of catoptron 503, laser beam is directly by laser hole, and transfers divergent beams to by convergent beam; The light of white light emitting diode then passes through after the mirror reflects, the green laser that directly passes through mixes, on same direction, export, thereby realize mixing, become the mixed lighting light source, realization is supplied the light emitting diode green glow, and then can make mixed effect the best with laser beam is coaxial after the beam reflection of light emitting diode.Certainly, in the above-mentioned light supply apparatus, should make laser beam be less than or equal to the size of laser hole through the focal spot area after the focus lens group 504, also can make the focus of focus lens group 504 be in laser hole near, make the facula area of laser beam be less than or equal to the laser hole cross-sectional area simultaneously at the laser hole place, because if the facula area of laser beam is greater than the words of laser hole cross-sectional area, laser has the waste of luminous energy, if the facula area of same laser beam is too much less than the laser hole cross-sectional area, then preferably dwindle laser hole cross-sectional area size, increase the reflection of light emitting diode light as far as possible, otherwise the maximum luminous power of light emitting diode is utilized; Simultaneously, the light-beam forming unit that is used to compress the LED source output light angle of divergence can use wedge shape rectangular pyramid or other optical device to realize.It will be appreciated by those skilled in the art that led light source can be white LED light source, also can be other monochromatic LED light sources, in addition, led light source also can be led array, and this is to determine according to the needs that reality is used.
Fig. 6 and Fig. 7 are that two kinds of three-primary color LED lamps swash the synoptic diagram of combiner as the Projection Display light source with RGB respectively.
Wherein, the Projection Display light source of Fig. 6 comprises red, green, blue LED lamp, red, green, blue laser, two dichroic mirrors and three catoptrons with structure shown in Figure 2, wherein, the ruddiness that red LED lamp 1001 is sent mixes with the red laser of red laser 1007 emissions, the green glow that green LED lamp 1002 is sent mixes with the green laser of green (light) laser 1008 emissions, the blue light that blue led lamp 1003 sends mixes with the blue laser of blue laser 1009 emissions, the hybrid mode of above-mentioned homochromy LED light and laser all adopts mode shown in Figure 5, simultaneously, after mixed ruddiness and mixed green glow close bundle by first dichroic mirror 1019, red green mixed light by second dichroic mirror 1020 and mixed blue combiner, obtains the required white light of Projection Display again.In addition, the position of red-light LED and blue-ray LED also can exchange each other, the red laser of mend and the position of blue laser be switch correspondingly also, also will change the corresponding plated film of first dichroic mirror and second dichroic mirror simultaneously, and this is understandable to those skilled in the art.
Projection Display among Fig. 7 uses color-combination prism (X-cube) 1122 to come two dichroic mirrors in the alternate figures 6 to carry out the synthetic of three primary colours light with light source, and is identical with Fig. 5 with the light beam hybrid mode of color, can obtain the required white light of Projection Display equally.In addition, identical with Fig. 6, the light path of ruddiness and blue light can replace each other, but the position of green glow is necessary for the position of directly passing through without reflection from the centre position of X-cube color-combination prism 1122.
The synthesize white light of Fig. 6 and Fig. 7 can be used for the projection light source of monolithic DLP (digital light processing), Monolithic LC OS and Monolithic LC D, and owing to light source is all provided by LED lamp and laser instrument, therefore the method for automatically controlled sequential can be adopted, thereby the colour wheel that uses in the conventional art can be removed.In addition, according to concrete needs, can selectivity mend into a certain or certain varicolored light.
Fig. 8-Figure 13 has provided the projector light line structure of several uses light supply apparatus of the present invention.
Fig. 8 is the embodiment that uses a kind of projector light path of light supply apparatus of the present invention in monolithic DLP ray machine.Comprise as the ultrahigh pressure mercury lamp 1209, LASER Light Source 1208, extender lens 1217, condenser lens 1218, catoptron 1207, optical wand 1210, focus lens group 1211, colour wheel 1212, relay lens group 1213, Digital Micromirror Device (the Digital Micro-mirror Device that are replenished light source, be called for short DMD) 1214 and projection lens set 1215 and screen 1216, wherein, catoptron 1207 structures are same as shown in Figure 2.The white light beam of ultrahigh pressure mercury lamp 1209 emission incides on the reflecting part of catoptron 1207 and is reflected away, laser instrument 1208 is the solid state laser of output 635nm red laser, after inciding condenser lens 1218 behind the red laser process extender lens 1217 expansion bundles, reenter on the laser hole that is mapped to catoptron 1207, and its focus is at the laser hole place of catoptron 1207, laser beam directly by behind catoptron 1207 laser holes with reflection after the coaxial output of the same direction of light beam of ultrahigh pressure mercury lamp 1209 outputs, mix and become the light source of Projection Display.Extender lens 1217 has increased laser through the degree of divergence behind the condenser lens 1218, has strengthened mixed effect.If but the hot spot of laser instrument itself just can satisfy the mixing requirement, then needn't add extender lens.The reflecting part of catoptron 1207 is coated with the broadband high-reflecting film to visible light.Mixed light beam carries out shimming by optical wand 1210 to it in light path handles, by described focus lens group 1211 it is assembled then, enter colour wheel 1212 again, the light of green glow, blue light and three kinds of colors of ruddiness is exported in regular turn according to a definite sequence of colour wheel setting, then by shining on the Digital Micromirror Device 1214 behind relay lens group 1213 image rotations, handle light beam later through after the projection lens set 1215 by DMD1214, shine imaging on the screen 1216 at last.LASER Light Source 1208 emission red lasers in the present embodiment are in order to improve the ruddiness brightness in the Projection Display, to adjust the intensity distributions of red-green-blue, thereby have improved the color saturation and the contrast of image.
Fig. 9 is the embodiment that uses a kind of projector light path of light supply apparatus of the present invention in three DLP ray machines.Comprise as the xenon lamp 1309 that is replenished light source, LASER Light Source 1308, coupled lens 1318, optical fiber 1319, condenser lens 1311, catoptron 1307, optical wand 1310, focus lens group 1312, plane mirror 1320, inner full-reflection prism (Total Interface Reflection, be called for short the TIR prism) 1321, color separation is color-combination prism (color splitting/recombining prism) 1322 again, red, green, blue DMD1323,1324 and 1325, and projection lens set 1315, wherein, laser mixes the catoptron that still uses structure shown in Figure 2 with xenon lamp.Laser light source 1308 is the semiconductor laser of emission 635nm red laser.Laser is at first gone into optical fiber 1319 by coupled lens 1318 is laggard, from optical fiber 1319 emitting laser bundles again by condenser lens 1311 incidents and focus on the laser hole of catoptron 1307, and, be coated with broadband high-reflecting film in the reflecting part of catoptron 1307 to visible light directly by outgoing behind the laser hole.After mixed light beam carries out shimming by optical wand 1310, assemble by focus lens group 1312 again, then through plane mirror 1320 reflections, enter inner full-reflection TIR prism (Total Interface Reflect ion, be called for short the TIR prism) 1321, the effect of TIR prism 1321 is to realize that incident light separates with emergent light, does not disturb mutually, make the incident light total reflection, emergent light sees through.TIR prism 1321 enters color separation color-combination prism 1322 again with the reflection of incident mixed light, color separation color-combination prism 1322 again makes mixed light be divided into indigo plant, green, red trichromatism in proper order, and incide respectively on indigo plant, green, the red DMD1325,1324 and 1323, the first red green look that closes of three-beam afterwards, blue light closes look with red green mixed light again, after exporting by TIR prism 1321 as emergent light once more at last, incide projection lens set 1315 back imagings.Wherein, TIR prism 1321 and color separation color-combination prism 1322 more all are optical device well known to those skilled in the art, and its structure can referenced patent number be first page second section of the US Patent specification of US6863401B2.
It should be understood by one skilled in the art that illuminator as Projection Display except xenon lamp, can also be LED lamp (comprising led array), ultrahigh pressure mercury lamp, metal halide lamp, Halogen lamp LED etc.
Figure 10 is to use three-primary color LED lamp of apparatus of the present invention and RGB to swash the synoptic diagram of combiner as a kind of projector light path of the monolithic DLP of Projection Display light source.LED and laser to close light identical with light channel structure shown in Figure 7 as the part of projection light source, the first line focus lens combination 1623 of mixed light beam converges to carries out shimming in the optical wand 1624, again via inciding in the TIR prism 1627 behind relay lens group 1625 image rotations, after handling on the DMD1626, be reflected, shine projection lens group 1628 from TIR prism 1627 again, at last imaging on screen 1629.Owing to adopt the method for automatically controlled sequential, removed the colour wheel in the conventional one-piece DLP light path in this light path, after the laser mix supplement, the brightness of the redgreenblue of optical projection system all was enhanced than before.In addition, according to the difference of white light luminous intensity distribution ratio, the RGB laser instrument can be selected the different laser instrument of power, especially at the situation of green glow deficiency, can select to replenish the bigger green laser of power.
Figure 11 is to use the synoptic diagram of the another kind of projector light path of three-primary color LED lamp of apparatus of the present invention and the monolithic DLP that one-wavelength laser closes Shu Zuowei Projection Display light source.LED and laser to close light basic identical with Fig. 6 as the part of projection light source, just only adopting green (light) laser to replenish green LED here becomes green mixed light, red blue two-way mend into.Mixed white light carries out shimming through focus lens group 1723 post-concentrations earlier in optical wand 1724, again via inciding in the TIR prism 1727 behind relay lens group 1725 image rotations, after handling on the DMD1726, be reflected, shine projection lens group 1728 from TIR prism 1727 again, at last imaging on screen 1729.This light path still adopts the method for automatically controlled sequential.In the above-mentioned Projection Display light source, imager chip, the F number that uses 0.79 inch under colour temperature 6500K is the optical projection system of 2.4 projection lens, and described LED lamp all adopts led array, and light-emitting area is 7mm
2, the luminous power of red, green and blue LED array is not about ruddiness 0.8W, green glow 0.7W, blue light 1.4W respectively before adding green (light) laser, because green glow has reached maximum luminous power, so limited the luminous power of ruddiness and blue light.Adopt above-mentioned Projection Display light source, add luminous power and be the laser of 532nm green (light) laser of 0.65W after, the luminous power of RGB is brought up to the about 1.2W of ruddiness, the about 1.1W of green glow, the about 1.8W of blue light respectively.The brightness ratio of the light supply apparatus output white light behind the adding green (light) laser had before improved about 50%.This method has improved the brightness of green glow greatly, and the color saturation of green glow, thereby has improved the overall brightness of white light.
Figure 12 is to use the synoptic diagram of a kind of projector light path of the three-primary color LED of apparatus of the present invention and three LCD that one-wavelength laser closes Shu Zuowei Projection Display light source.Green glow led array 1801 uses catoptrons 1803 to carry out light beam by mode shown in Figure 5 and green (light) laser 1804 to mix among the figure, red-light LED array 1811 and blue-ray LED array 1821 then no longer replenish with laser, and the mixed light of green glow is in proper order through entering color-combination prism 1838 behind collimation lens 1831, polaroid 1832, condenser lens 1833, optical wand 1834 and relay lens group 1835 and the green glow LCD liquid crystal light valve 1808; And ruddiness and blue LED lamp 1811 and 1821 through each self-corresponding collimation lens 1813 and 1823, polaroid 1814 and 1824, condenser lens 1815 and 1825, optical wand 1816 and 1826, relay lens group 1817 and 1827 and LCD liquid crystal light valve 1818 and 1828 after enter color-combination prism 1838, by color-combination prism 1838 RGB three primary colours light is closed light again, by projection lens set 1839 imaging on screen 1840.Wherein, in order to improve the utilization ratio of light beam, the light-beam forming unit that is used to compress the LED lamp output beam angle of divergence can use the wedge shape rectangular pyramid, like this, can also utilize polaroid that S light is passed through, P light reflects back, and is changed once more for natural light and with follow-up output light in led array surface and wedge shape rectangular pyramid and exports, and realizes that the part of P light is utilized once more.
Figure 13 is to use the three-primary color LED lamp of apparatus of the present invention and the sharp combiner synoptic diagram as a kind of projector light path of three LCOS of Projection Display light source.Blue light led array 1921 and green light LED array 1901 carry out light beam with blue laser 1922 and green (light) laser 1902 respectively by mode shown in Figure 5 and mix among the figure, and red-light LED array 1941 then no longer replenishes with laser.The mixed light of blue light is in proper order through entering X-cube color-combination prism 1961 behind collimation lens 1927, polaroid 1928, condenser lens 1929, optical wand 1930, relay lens group 1931, PBS array 1933 and the blue light LCOS1932; The mixed light of green glow is in proper order through entering X-cube color-combination prism 1961 behind collimation lens 1907, polaroid 1908, condenser lens 1909, optical wand 1910, relay lens group 1911, plane mirror 1912, PBS array 1943 and the green glow LCOS1942; Ruddiness then replenishes directly without laser instrument and enters X-cube color-combination prism 1961 behind order process collimation lens 1947, polaroid 1948, condenser lens 1949, optical wand 1950, relay lens group 1951, PBS array 1953 and the ruddiness LCOS1952; By color-combination prism 1961 RGB three primary colours light is closed light again, project on the screen, realize the Projection Display of image by projection lens set 1962.Wherein, in order to improve the utilization ratio of light beam, the light-beam forming unit that is used to compress the LED lamp output beam angle of divergence can use the wedge shape rectangular pyramid, like this, can also utilize polaroid that S light is passed through, P light reflects back, and is changed once more for natural light and with follow-up output light in led array surface and wedge shape rectangular pyramid and exports, and realizes that the part of P light is utilized once more.Acting as after the reflection of the p polarized light of incident light of PBS array, incident light are the s polarization on the LCOS surface through modulation conversion, and s polarized light transmission again enters the X-cube color-combination prism after passing the PBS array.
It is emphasized that at last, among above-mentioned Fig. 6,7,9,10,11,12,13, in order to realize that image shows, it is identical or make light path reach the condition of the identical effect of light path also to require the light path of RGB three tunnel should satisfy light path, and this is known to those skilled in the art.
Certainly, according to the needs in the practical application, light supply apparatus of the present invention can also mix the laser versus lamp bubble of other wavelength and color with the light that LED sends mutually.It should be noted that embodiment structure and the technical scheme only in above each accompanying drawing at last in order to light supply apparatus of the present invention to be described, but unrestricted.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. light supply apparatus that is used for Projection Display, comprise by additional light source and LASER Light Source, comprise also being used for the light and the synthetic a branch of catoptron of described LASER Light Source emitted laser that are replenished light emitted with described that described catoptron comprises and is used to reflect the described laser hole that light source output reflection of light part and the laser that described LASER Light Source is sent directly pass through that replenished.
2. light supply apparatus according to claim 1 is characterized in that, the surface, reflecting part of described catoptron is coated with increases the high-reflecting film that is replenished light source output beam reflection efficiency.
3. light supply apparatus according to claim 1 is characterized in that described reflecting part is shaped as plane, parabola, hyperboloid or sphere.
4. light supply apparatus according to claim 1 is characterized in that, is provided with beam alignment system between described LASER Light Source and the described catoptron.
5. light supply apparatus according to claim 4 is characterized in that, the coupling mirror that described beam alignment system comprises optical fiber and is used for described laser coupled is advanced described optical fiber.
6. light supply apparatus according to claim 4 is characterized in that described beam alignment system also comprises condenser lens.
7. light supply apparatus according to claim 6 is characterized in that described beam alignment system also comprises extender lens.
8. light supply apparatus according to claim 1 is characterized in that, described is LED lamp, ultrahigh pressure mercury lamp, metal halid lamp, xenon lamp, Halogen lamp LED by additional light source.
9. a projector is characterized in that, described projector uses aforesaid right to require the light source of each described light supply apparatus of 1-8 as projector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101937045A CN101430493A (en) | 2007-11-08 | 2007-11-23 | Light source for projection system and projection display device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710177035.2 | 2007-11-08 | ||
| CN200710177035 | 2007-11-08 | ||
| CNA2007101937045A CN101430493A (en) | 2007-11-08 | 2007-11-23 | Light source for projection system and projection display device |
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| CN101430493A true CN101430493A (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101878583A Expired - Fee Related CN101430492B (en) | 2007-11-08 | 2007-11-14 | Light source for projection system and projection display device |
| CNU2007201950365U2007201950365U Expired - Fee Related CN201097088Y (en) | 2007-11-08 | 2007-11-14 | A light source device for projection system and projection display device |
| CNU2007203057454U Expired - Fee Related CN201134006Y (en) | 2007-11-08 | 2007-11-16 | Light source for projection system and projection display device |
| CNA2007101872483A Pending CN101430491A (en) | 2007-11-08 | 2007-11-16 | Light source for projection system and projection display device |
| CNU2007203052268U Expired - Fee Related CN201104278Y (en) | 2007-11-08 | 2007-11-23 | Light source for projection system and projection display device |
| CNA2007101937045A Pending CN101430493A (en) | 2007-11-08 | 2007-11-23 | Light source for projection system and projection display device |
| CNA2007101937810A Pending CN101430494A (en) | 2007-11-08 | 2007-11-27 | Light source apparatus for projection display and projection display apparatus |
| CNU2007203052978U Expired - Fee Related CN201138418Y (en) | 2007-11-08 | 2007-11-27 | Light source apparatus for projection display and projection display apparatus |
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| CN2007101878583A Expired - Fee Related CN101430492B (en) | 2007-11-08 | 2007-11-14 | Light source for projection system and projection display device |
| CNU2007201950365U2007201950365U Expired - Fee Related CN201097088Y (en) | 2007-11-08 | 2007-11-14 | A light source device for projection system and projection display device |
| CNU2007203057454U Expired - Fee Related CN201134006Y (en) | 2007-11-08 | 2007-11-16 | Light source for projection system and projection display device |
| CNA2007101872483A Pending CN101430491A (en) | 2007-11-08 | 2007-11-16 | Light source for projection system and projection display device |
| CNU2007203052268U Expired - Fee Related CN201104278Y (en) | 2007-11-08 | 2007-11-23 | Light source for projection system and projection display device |
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| CNA2007101937810A Pending CN101430494A (en) | 2007-11-08 | 2007-11-27 | Light source apparatus for projection display and projection display apparatus |
| CNU2007203052978U Expired - Fee Related CN201138418Y (en) | 2007-11-08 | 2007-11-27 | Light source apparatus for projection display and projection display apparatus |
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-
2007
- 2007-11-14 CN CN2007101878583A patent/CN101430492B/en not_active Expired - Fee Related
- 2007-11-14 CN CNU2007201950365U2007201950365U patent/CN201097088Y/en not_active Expired - Fee Related
- 2007-11-16 CN CNU2007203057454U patent/CN201134006Y/en not_active Expired - Fee Related
- 2007-11-16 CN CNA2007101872483A patent/CN101430491A/en active Pending
- 2007-11-23 CN CNU2007203052268U patent/CN201104278Y/en not_active Expired - Fee Related
- 2007-11-23 CN CNA2007101937045A patent/CN101430493A/en active Pending
- 2007-11-27 CN CNA2007101937810A patent/CN101430494A/en active Pending
- 2007-11-27 CN CNU2007203052978U patent/CN201138418Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI454824B (en) * | 2010-05-07 | 2014-10-01 | Qisda Corp | Projector apparatus utilizing wedge lens |
| WO2013029422A1 (en) * | 2011-08-29 | 2013-03-07 | 深圳市绎立锐光科技开发有限公司 | Light source, light combining device, and projection device with the light source |
| US9891439B2 (en) | 2011-08-29 | 2018-02-13 | Appotronics Corporation Limited | Light source, light combining device, and projection device with the light source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN201097088Y (en) | 2008-08-06 |
| CN101430492A (en) | 2009-05-13 |
| CN201134006Y (en) | 2008-10-15 |
| CN201138418Y (en) | 2008-10-22 |
| CN101430491A (en) | 2009-05-13 |
| CN201104278Y (en) | 2008-08-20 |
| CN101430494A (en) | 2009-05-13 |
| CN101430492B (en) | 2011-05-18 |
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