CN201097088Y - A light source device for projection system and projection display device - Google Patents
A light source device for projection system and projection display device Download PDFInfo
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- CN201097088Y CN201097088Y CNU2007201950365U2007201950365U CN200720195036U CN201097088Y CN 201097088 Y CN201097088 Y CN 201097088Y CN U2007201950365U2007201950365 U CNU2007201950365U2007201950365 U CN U2007201950365U2007201950365U CN 200720195036 U CN200720195036 U CN 200720195036U CN 201097088 Y CN201097088 Y CN 201097088Y
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Abstract
The utility model provides a light source device provided with high brightness, high contrast grade and high color saturation and used for a projection system, and a projection display device; the light source device provided by the utility model comprises a supplemented light source and a laser source. The utility model is characterized in that the light source device also comprises a reflecting mirror, the reflecting mirror comprises a reflecting surface, and the laser emitted by the laser source is mixed with the light emitted by the supplemented light source in the identical direction and is output after being reflected through the reflecting surface of the reflecting mirror; the light source device enables the laser of an optical maser to be skillfully introduced into the bulb of the projection system, and the LED light emitting light source, proposes a new idea that a kind of laser and other light sources are mixed to be taken as the lighting source of the projection system, can successfully adjust the intensity distribution of three primary color of red, green and blue, improves the properties of brightness, color saturation and contrast grade, and has higher practical value in the projection display field.
Description
Technical field
The utility model 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.We lay down a definition with luminescent spectrum Fig. 1 of ultrahigh pressure mercury lamp, the wave band broad of ruddiness as shown in the figure, 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 utility model 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 utility model provides a kind of projection display equipment.
On the one hand, the utility model provides a kind of light supply apparatus, comprise by additional light source and LASER Light Source, it is characterized in that, also comprise a catoptron, described catoptron comprises a reflecting surface, and described LASER Light Source emitted laser is mixed output through the reflecting surface reflection back of described catoptron with the described light that is sent by additional light source on same direction.
Further, described by additional light source and the coaxial mixing output of LASER Light Source.
Further, described catoptron is that reflecting surface is located at its inner reflecting prism.
Further, described reflecting prism is made up of two prisms, every prism comprises an adhesive surface, and the adhesive surface of described two prisms is all used the optics glue bond except that core, thereby forms the clearance as described reflecting surface at the core of two adhesive surfaces.
Further, the size of described clearance is under the prerequisite that allows the laser beam focal spot pass through, and is as much as possible little, and the cross section of clearance can be shapes such as circle, rectangle.
Further, the relative index of refraction of described optical cement and described prism material is 0.98-1.02.
Further, described prism is a right-angle prism, and the preferred triangular prism of described right-angle prism, described adhesive surface are the bottom surface of described right-angle prism.
Further, there is plated film on the surface of described prism, and the plane of incidence of laser need plate the anti-reflection film of corresponding optical maser wavelength on reflecting prism, all is coated with the corresponding anti-reflection film that is replenished the light source output light wavelength and replenish the plane of incidence and the exit facet of light source on reflecting prism.
Can also be provided with beam alignment system between described LASER Light Source and the described catoptron.
Further, the described beam alignment system coupling mirror that can comprise optical fiber and be 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 the used light source of optical projection system, comprise LED lamp, ultrahigh pressure mercury lamp, metal halide lamp, xenon lamp, Halogen lamp LED etc. by additional light source.
On the other hand, the utility model also provides a kind of projector, and this projector uses the light source of above-mentioned light supply apparatus as projector.
The utility model is introduced 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 new 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, adjusted the intensity distributions of red-green-blue, improved brightness, 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 utility model 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 embodiment of the present utility model 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 to use the laser of normal mirror to replenish the synoptic diagram of the light supply apparatus of bulb;
Fig. 3 is to use the laser of normal mirror to replenish the synoptic diagram of the light supply apparatus of light emitting diode;
Fig. 4 and Fig. 5 are respectively a kind of side view and stereographic maps of new type reflection prism;
Fig. 6 is the synoptic diagram of another reflecting prism;
Fig. 7 is to use the laser of reflecting prism to replenish the synoptic diagram of the light supply apparatus of bulb;
Fig. 8 is the spectrogram of ultrahigh pressure mercury lamp behind the additional light source of laser;
Fig. 9 is to use the laser of reflecting prism to replenish the synoptic diagram of the light supply apparatus of light emitting diode;
Figure 10 and Figure 11 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;
Figure 12 is the synoptic diagram that uses a kind of projector light path of the utility model light supply apparatus in monolithic DLP;
Figure 13 is the synoptic diagram that uses a kind of projector light path of the utility model light supply apparatus in three DLP;
Figure 14 is the synoptic diagram that uses a kind of projector light path of the utility model light supply apparatus in three LCD;
Figure 15 is the synoptic diagram that uses a kind of projector light path of the utility model light supply apparatus in three LCOS.
Figure 16 is to use the three-primary color LED lamp of the utility model device 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 17 is to use the synoptic diagram of the another kind of projector light path of the three-primary color LED lamp of the utility model device and the monolithic DLP that one-wavelength laser closes Shu Zuowei Projection Display light source;
Figure 18 is to use the synoptic diagram of a kind of projector light path of the three-primary color LED lamp of the utility model device and three LCD that one-wavelength laser closes Shu Zuowei Projection Display light source;
Figure 19 is to use the three-primary color LED lamp of the utility model device and RGB to swash the synoptic diagram of combiner 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 to use the laser of normal mirror to replenish the light supply apparatus of bulb.This light supply apparatus mainly is made up of by the bulb 201 of additional light source laser instrument 202, condenser lens 203, catoptron 204 and conduct, wherein, the red laser bundle of laser instrument 202 emissions is through behind the condenser lens 203, focus on catoptron 204 the surface or neighbouring on, the surface of catoptron 204 is coated with the high anti-high-reflecting film of wavelength to the red laser of incident, laser beam is after the surface of catoptron is reflected through catoptron 204, the direction of outgoing is identical with the direction that bulb sends light beam, has just realized the purpose that LASER Light Source is mixed with the output beam of bulb.Condenser lens 203 can also use focus lens group or other can realize the optical component of focussing force.Also can comprise extender lens in the focus lens group, with laser beam expanding, because the effect that the laser versus lamp bubble of dispersing with certain angle of divergence mixes can be better, and laser beam reflection back then can make mixed effect the best with the light beam of bulb is coaxial.Described laser instrument 202 can be solid state laser, also can be semiconductor laser, fiber laser, gas laser etc.The red laser that described laser instrument 202 is selected for use selects 630nm better to the wavelength of 670nm.And the bulb here also can be one of ultrahigh pressure mercury lamp, metal halide lamp, Halogen lamp LED and xenon lamp or its combination, and this knows those skilled in the art.In order to reduce the influence of catoptron to the bulb output beam, simultaneously again can be with the laser-bounce of whole incidents, condenser lens 203 should make the focus of laser be in the surface or near the position of catoptron 204 as far as possible, so just might the volume that catoptron 204 is made is littler, to reduce because of its volume stopping to bulb output light.
Fig. 3 is to use the laser of normal mirror to replenish the light supply apparatus of light emitting diode, mainly comprise LED source 301, light-beam forming unit 302, catoptron 303, laser instrument 307, coupled lens group 306, optical fiber 305 and focus lens group 304,301 of LED source are luminous by after light-beam forming unit 302 shapings, the light angle of divergence of lambert's bodily form formula is compressed, and the angle of divergence after the compression can be decided according to the aperture angle of follow-up optical projection system; 307 emitted laser of LASER Light Source enter optical fiber 305 by coupled lens group 306, the emergent light of optical fiber 305 focuses on by focus lens group 304, the angle of divergence will be controlled in the aperture angle of optical projection system equally, adjust light path, laser beam foucing after focusing on through focus lens group 304 is positioned near the surface of catoptron 303 or its, after catoptron 303 reflections, the direction of laser beam optical axis is consistent with the optical axis direction of the LED light beam of described light-beam forming unit 302 outputs, thereby realizes the mixing output of two kinds of light sources.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, this is to determine according to the needs that reality is used; 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.
Yet, use a shortcoming of the catoptron among Fig. 2 or Fig. 3 apparent, that is replenished light beam that light source sends to understand some light mirror that is reflected and stop, stop too much beam energy in order to reduce catoptron as much as possible, have only as much as possible catoptron is made littler, in fact, as long as the reflecting surface of catoptron size equates just much of that with the cross section of laser beam, in the practical application, the focused spot diameter of laser beam is generally a millimeter magnitude, yet, so little catoptron is the cost of manufacture height not only, and because its very small volume is also very difficult fixing in actual light path, and its stationary installation also can influence to some extent to light path, even, stopped that than catoptron more quilt replenishes light beam on the contrary because its stationary installation must appear among the light path.
Therefore, Fig. 4 and Fig. 5 have provided a kind of reflecting prism with new structure, this reflecting prism is made up of two right angle trigonometry prisms 407 and 408, two right angle trigonometry prisms 407 and 408 inclined-plane all use optical cement 406 to be bonded together except that core, because optical cement 406 has certain thickness, thereby form clearance 405 at the core of two adhesive surfaces.As long as the size of clearance 405 can allow incident laser beam or focus on after laser beam all by, cross sectional shape can be various suitable shapes such as circle or rectangle.Circular air-gap is cumbersome when bonding, the rectangle air-gap is relatively easy, has two sides and air straight-through, but circular air-gap is because bond area has more a part than rectangle, can make by additional light source by more rays, so can according to circumstances select different air-gap shapes.In application, the surface of prism can be coated with different film systems according to the different needs that light beam passes through respectively, for example the plane of incidence of laser need plate the anti-reflection film that laser wave is grown tall on reflecting prism, and all is coated with being replenished the high saturating anti-reflection film of light source by the plane of incidence of additional light source and exit facet on reflecting prism.Under the condition of cross section that guarantees clearance 405 greater than lasing aperture, should reduce the thickness d of reflecting prism as far as possible, this remains for reducing being replenished the consideration that light source output light disturbs.And the structure of this reflecting prism is fixed owing to the easier realization of increase on its volume, and stationary installation then needn't appear in the light path, has avoided the interference to light path.
Fig. 6 has provided the structure of another reflecting prism, this reflecting prism is a kind of distortion of Fig. 4 and reflecting prism structure shown in Figure 5, use the right angle trigonometry prism among two right-angled trapezium prism alternate figures 3 and Fig. 4, the angle of the inclined-plane of described right-angled trapezium prism and right angle face is 45 °, and other structures are identical with the reflecting prism of Fig. 3 and Fig. 4.Certainly, other distortion can also be arranged, length as limit b among Fig. 6 and limit c can change, and the shape of limit a can change other arbitrary shapes under the prerequisite that source light passes through not influencing to be replenished, in principle, under the situation that does not influence the prism subjective role, reflecting prism all should be covered by among the content of this patent in shape any variation.
Fig. 7 comprises LASER Light Source 708, condenser lens 705, ultrahigh pressure mercury lamp 706 and reflecting prism 707 for the light supply apparatus of the additional bulb of laser of above-mentioned Fig. 4 of employing and new structure reflecting prism shown in Figure 5; Wherein, LASER Light Source 708 is the ruddiness solid state laser of 635nm, and two right-angle prisms of reflecting prism are that 1.51 K9 glass is made by refractive index all, and it is 1.51 ultra-violet curing glue that middle optical cement then adopts refractive index.Behind the ruddiness solid state laser emitted laser bundle line focus lens 705, right angle face vertical incidence from a right-angle prism, it is the anti-reflection film (transmitance is greater than 99%) of 635nm laser that this right angle face is coated with wavelength, be in 704 places, clearance and 704 places generation total reflection through the laser focal spot after condenser lens 705 convergences, by the vertical outgoing of another right angle face of this right-angle prism in the clearance; The light beam that described ultrahigh pressure mercury lamp 706 sends is by the right angle face incident of another right-angle prism, and directly transmission, pass the optical axis coincidence of described reflecting prism 707 backs and described laser beam, thereby the benefit that realizes ruddiness is gone into, and two of ultrahigh pressure mercury lamp incident and outgoing right angle faces all are coated with the broad-band transparence-increased film of visible light on the reflecting prism 707.Mixed spectrum synoptic diagram as shown in Figure 8.Fig. 8 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 thickness d of described reflecting prism can be very little, those of ordinary skills are to be understood that, as long as thickness d just can guarantee the total reflection of laser beam, with this understanding greater than the diameter of section of incoming laser beam, thickness d can be done extremely thinly, like this, only some is through described reflecting prism transmission for the light that ordinary light source sends, and another part then directly mixes with described laser beam without reflecting prism.
Fig. 9 mixes the light supply apparatus that carries out Projection Display as the LED source of being replenished light source with LASER Light Source.The structure of this light supply apparatus is similar to Fig. 3, just catoptron uses the reflecting prism of Fig. 4 and structure shown in Figure 5, wherein, LED source 901 is a white light emitting diode, institute is luminous by behind the light-beam forming unit 902, 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 direct transmission of the emergent light of light-beam forming unit 902 is by reflecting prism 903, and the LED light beam is coated with broad-band transparence-increased film on the respective surfaces of incident and outgoing on the reflecting prism 903; LASER Light Source 907 is the green glow solid state laser of 532nm, and institute's emitted laser enters optical fiber 905 by coupled lens group 906, and the emergent light of optical fiber 905 focuses on by focus lens group 904, and the angle of divergence is controlled in the aperture angle of optical projection system.It is the anti-reflection film (transmitance is greater than 99%) of 532nm laser that laser is coated with on the laser entrance face of reflecting prism 903 wavelength.Adjust light path, make the focus of laser beam be in the place, clearance of reflecting prism 903, total reflection takes place at the place, clearance in laser, and transfers divergent beams to by convergent beam; The light of white light emitting diode then after the penetration prism and the green laser after the reflection mix, become the mixed lighting light source, realize the light emitting diode green glow is supplied.Certainly, in the above-mentioned light supply apparatus, should make the focal spot area of laser beam be less than or equal to the size of clearance, also can make the focus of laser beam be in the clearance the surface near, make laser beam be less than or equal to the clearance simultaneously at the facula area at place, clearance, because if the facula area of laser beam is greater than the words of clearance, have the waste of luminous energy, if the facula area of same laser beam is too much less than the clearance, then preferably dwindle the air-gap size, stop the light of light emitting diode less as far as possible, otherwise the maximum luminous power of light emitting diode is utilized.
Figure 10 and Figure 11 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 Figure 10 comprises red, green, blue LED lamp, red, green, blue laser, two dichroic mirrors and three reflecting prisms with Fig. 4 and structure shown in Figure 5, 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 9, 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, red laser of mend and 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 Figure 11 uses color-combination prism (X-cube) 1122 to substitute two dichroic mirrors among Figure 10 with light source, and other structures are identical with Figure 10, and are identical with Fig. 9 with the light beam hybrid mode of color, can obtain the required white light of Projection Display equally.In addition, identical with Figure 10, the light path of ruddiness and blue light can replace each other, but green glow must directly pass through without reflection from the centre position of X-cube color-combination prism 1122, and this knows those skilled in the art.
The synthesize white light of Figure 10 and Figure 11 can be used for the projection light source of monolithic DLP (digital lightprocessing), 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.Specific embodiment is referring to Figure 16 described below and Figure 17.
Figure 12-Figure 19 has provided the projector light line structure of several use the utility model light supply apparatuses.
Figure 12 is the embodiment that uses a kind of projector light path of the utility model light supply apparatus in monolithic DLP ray machine.Comprise as ultrahigh pressure mercury lamp 1209, LASER Light Source 1208, extender lens 1217, condenser lens 1218, reflecting prism 1207, optical wand 1210, focus lens group 1211, colour wheel 1212, relay lens group 1213, Digital Micromirror Device DMD1214 and the projection lens set 1215 and the screen 1216 that are replenished light source, wherein, reflecting prism 1207 structures and Fig. 4 and shown in Figure 5 identical, reflecting prism 1207 is that 1.51 K9 glass is made by refractive index, optical cement uses ultra-violet curing glue, and its refractive index also is 1.51.The white light beam vertical incidence reflecting prism 1207 of ultrahigh pressure mercury lamp 1209 emissions and direct transmission are gone out, laser instrument 1208 is the solid state laser of output 635nm red laser, red laser incides condenser lens 1218 after expanding bundle through extender lens 1217, reenter and be mapped in the reflecting prism 1207, and focus on the clearance place of reflecting prism 1207, be mixed into the light source of Projection Display through reflecting prism 1207 reflection backs and described ultrahigh pressure mercury lamp 1209 emitted light beams.Extender lens 1217 has increased laser through the degree of divergence behind the condenser lens 1218, makes laser more approaching with the degree of divergence that is replenished light source, thereby 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 laser entrance face of reflecting prism 1207 is coated with the anti-reflection film to wavelength 635nm laser, is coated with the broad-band transparence-increased film of visible light on the plane of incidence of the ultrahigh pressure mercury lamp 1209 output light of reflecting prism 1207 and exit facet.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 Digital Micromirror Device (Digital Micro-mirror Device behind relay lens group 1213 image rotations, be called for short DMD) on 1214, 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.
Figure 13 is the embodiment that uses a kind of projector light path of the utility model light supply apparatus 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, reflecting prism 1307, optical wand 1310, focus lens group 1312, plane mirror 1320, inner full-reflection prism (Total InterfaceReflection, be called for short the TIR prism) 1321, color separation is color-combination prism (colorsplitting/recombiningprism) 1322 again, red, green, blue DMD1323,1324 and 1325, and projection lens set 1315, wherein, laser mixes the reflecting prism that still uses Fig. 4 and structure shown in Figure 5 with xenon lamp, reflecting prism use refractive index is 1.51 K9 glass, optical cement uses ultra-violet curing glue, and its refractive index is 1.51.But the thickness of reflecting prism 1307 is 2 millimeters.Because thickness is less, the light of xenon lamp 1309 emissions has only above part is mapped to.LASER Light Source 1308 is the semiconductor laser of emission 635nm red laser.Laser at first is coupled into optical fiber 1319 by coupled lens 1318, from optical fiber 1319 emitting laser bundles again by condenser lens 1311 vertical incidence and focus on the clearance of reflecting prism 1307, through outgoing after the total reflection, because the thickness of reflecting prism 1307 is very little, also mix with described laser beam after the transmission as being incided on the described reflecting prism 1307 by the light part of xenon lamp 1309 emissions of additional light source, another part then directly mixes with described laser beam.Be coated with anti-reflection film at the laser entrance face of reflecting prism 1307, on the plane of incidence of the xenon lamp 1309 output light of reflecting prism 1307 correspondences and exit facet, be coated with the broad-band transparence-increased film of visible light wavelength 635nm laser.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 Reflection, 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 14 is the embodiment that uses a kind of projector light path of the utility model light supply apparatus in three liquid crystal light valves.Wherein, mixing still of the light that is replenished light source output and laser realizes that by Fig. 4 and reflecting prism shown in Figure 5 reflecting prism use refractive index is 1.51 K9 glass, optical cement use ultra-violet curing glue, and its refractive index is 1.51.LASER Light Source 1408 is the solid state laser of emission 635nm red laser, laser is focused on the clearance of reflecting prism 1407 after expanding bundle through first focus lens group 1411, through outgoing after the total reflection, adopt ultrahigh pressure mercury lamp 1409 as the illuminator that is replenished light source, adjust the focal plane F of the ultrahigh pressure mercury lamp 1409 of output convergent beam, the focus of laser beam is also dropped on the F of focal plane, and the focal length of the focus of laser beam and ultrahigh pressure mercury lamp 1409 output light is approaching as much as possible, but the focus of ultrahigh pressure mercury lamp 1409 output light can not be positioned on the clearance of reflecting prism 1407, two-beam is realized mixing through the reflecting prism 1407 equidirectional outputs in back.Wherein also can comprise extender lens in first focus lens group.Be coated with anti-reflection film at the laser entrance face of reflecting prism 1407, on the plane of incidence of reflecting prism 1407 corresponding ultrahigh pressure mercury lamps 1409 output light and exit facet, be coated with the broad-band transparence-increased film of visible light wavelength 635nm laser.Mixed light beam becomes directional light or quasi-parallel light after through second focus lens group 1417, carry out shimming through first fly's-eye lens 1426 again, order is through first plane mirror 1427, second fly's-eye lens 1436, polarization spectroscope PBS array 1434 and the 3rd condenser lens group 1451 then, wherein, the effect of first plane mirror 1427 is with the light total reflection, described second fly's-eye lens 1436 has remained the effect of shimming, and described PBS array 1434 is converted to polarized light with the nature mixed light; On first dichroic mirror 1428, mixed polarized light is separated into blue light and red green mixed light by the polarized light of the 3rd condenser lens group 1451 outgoing, described blue light order is through second plane mirror 1440, enter color-combination prism 1430 behind first condenser lens 1441 and first liquid crystal light valve 1431, described red green mixed light further is separated into green glow and ruddiness on second dichroic mirror 1438, described green glow enters color-combination prism 1430 after through second condenser lens 1442 and second liquid crystal board 1432, described ruddiness order is through the first trace lens 1429, the 3rd plane mirror 1450, the second trace lens 1439, Siping City's face catoptron 1420, the 3rd condenser lens 1443, and the 3rd enter color-combination prism 1430 behind the liquid crystal board 1433, like this, the RGB three-beam closes light again and projects on the screen through projection lens set 1415 in described color-combination prism 1430, realize the demonstration of image.Wherein, because blue light is identical with the light path of green glow, and the light path of ruddiness is longer, and the effect of trace lens is to make ruddiness transfer effect with the identical light path of blue green light to.
The embodiment of Figure 14 is that first light beam and red laser beam mixing with ultrahigh pressure mercury lamp 1409 also enters in the optical system of projector as light source behind the shimming, those of ordinary skills are to be understood that, also can earlier ultrahigh pressure mercury lamp 1409 emitted light beams be introduced the optical system of projector as light source, then in follow-up structure, on the light path between second dichroic mirror, 1438 to the 3rd liquid crystal boards 1433, re-use reflecting prism 1407 red laser is incorporated in the optical system of projector.
Figure 15 is to use a kind of synoptic diagram with projector light path of three LCOS (LiquidCrystal on Silicon) of the utility model light supply apparatus.Comprise as the ultrahigh pressure mercury lamp 1509 that is replenished light source, the LASER Light Source 1508 of emission 635nm ruddiness, first focus lens group 1511, reflecting prism 1507 with Fig. 4 and structure shown in Figure 5, second focus lens group 1517, first and second fly's-eye lenses 1526 and 1536, first plane mirror 1527, PBS array 1534, the 3rd condenser lens group 1521, first and second dichroic mirrors 1540 and 1560, the first and second trace lens 1529 and 1539, three LCOS1541,1551 and 1561, three PBS1542,1552 and 1562, color-combination prism 1530, and projection lens set 1515, wherein, the hybrid mode light channel structure of the Projection Display light source first half among Figure 15 is identical with Figure 14, thereafter light path adopts three traditional LCOS schemes, be in the latter half light path, PBS array 1534 is converted to the p polarized light with natural light, through inciding after the 3rd condenser lens group 1521 on first dichroic mirror 1540, first dichroic mirror 1540 is separated into ruddiness and bluish-green mixed light with incident p polarized light, described ruddiness order is through the first trace lens 1529, second plane mirror 1550, incide among the PBS1562 behind the second trace lens 1539, the one PBS1562 is the s polarization with the p polarized red beam reflection of incident and with its polarization conversion, the ruddiness of s polarization incides on the ruddiness LCOS and is reflected, and transmission enters color-combination prism 1530 after passing a PBS1562 once more; Described bluish-green mixed light is separated into blue light and green glow after through second dichroic mirror 1560, the blue light of described p polarization is through the 2nd PBS1542 reflection and be converted to the s polarization and incide on the blue light LCOS1541, enters color-combination prism 1530 after passing the 2nd PBS1542 through the reflection of blue light LCOS1541 and transmission; Similar with blue light, described green glow is the s polarization through the reflection of the 3rd PBS1552 and by the p polarization conversion, enter color-combination prism 1530 after also the 3rd PBS1552 is passed in transmission by green glow LCOS1551 reflection, through color-combination prism 1530 RGB three primary colours light is closed the bundle back again and project on the screen, realize the Projection Display of image by projection lens set 1515.Wherein, because blue light is identical with the light path of green glow, and the light path of ruddiness is longer, and the effect of trace lens is to make ruddiness transfer effect with the identical light path of blue green light to.
Figure 16 is to use the three-primary color LED lamp of the utility model device 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 11 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.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 17 is to use the synoptic diagram of the another kind of projector light path of the three-primary color LED lamp of the utility model device and the monolithic DLP that one-wavelength laser closes Shu Zuowei Projection Display light source.LED and laser to close light basic identical with Figure 10 as the part of projection light source, just only adopt green (light) laser to replenish the green light LED lamp here, red blue two-way mend into.Mixed light beam 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.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 18 is to use the synoptic diagram of a kind of projector light path of the three-primary color LED lamp of the utility model device and three LCD that one-wavelength laser closes Shu Zuowei Projection Display light source.Green glow led array 1801 uses reflecting prisms 1803 to carry out light beam by mode shown in Figure 9 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; And ruddiness and blue LED lamp 1811 and 1821 are through behind separately the light-beam forming unit 1812 and 1822 its angles of divergence of compression, again 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 green beam apparatus for shaping 1802 that is used to compress the green light 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 to export in green light LED array surface and wedge shape rectangular pyramid, realizes that the part of P light is utilized once more.
Figure 19 is to use the three-primary color LED lamp of the utility model device and RGB to swash the synoptic diagram of combiner as a kind of projector light path of three LCOS of Projection Display light source.Figure 19 and Figure 18 are basic identical, just hybrid light source is that red green two laser instruments are mixed into respectively in the red green led array, blue light is then all provided by blue LED lamp, and use PBS and LCOS combination replacement the LCD liquid crystal light valve among Figure 18, about combination and the use-pattern of PBS and LCOS is described in detail in Figure 15, just repeat no more here.
It is emphasized that at last, among above-mentioned Figure 10,11,13,14,15,16,17,18,19, 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 utility model 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 utility model to be described, but unrestricted.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (14)
1. light supply apparatus that is used for Projection Display, comprise by additional light source and LASER Light Source, it is characterized in that, also comprise a catoptron, described catoptron comprises a reflecting surface, and described LASER Light Source emitted laser is mixed output through described reflecting surface reflection back with the described light that is sent by additional light source on same direction.
2. light supply apparatus according to claim 1 is characterized in that, and is described by additional light source and the coaxial mixing output of described LASER Light Source.
3. light supply apparatus according to claim 1 is characterized in that, described catoptron is that reflecting surface is located at its inner reflecting prism.
4. light supply apparatus according to claim 3, it is characterized in that, described reflecting prism is made up of two prisms, every prism comprises an adhesive surface, the adhesive surface of described two prisms is all used the optics glue bond except that core, thereby forms the clearance as described reflecting surface at the core of two adhesive surfaces.
5. light supply apparatus according to claim 4 is characterized in that, the cross section of described clearance is circle or rectangle.
6. light supply apparatus according to claim 4 is characterized in that, the relative index of refraction of described optical cement and described prism material is 0.98-1.02.
7. light supply apparatus according to claim 4 is characterized in that, described prism is a right-angle prism, and described adhesive surface is the bottom surface of right-angle prism.
8. light supply apparatus according to claim 4 is characterized in that the laser entrance face of described reflecting prism is coated with the anti-reflection film to laser-transmitting, and the quilt of reflecting prism replenishes the light source plane of incidence and exit facet all is coated with being replenished the anti-reflection film of light source transmission.
9. 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.
10. light supply apparatus according to claim 9 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.
11. light supply apparatus according to claim 9 is characterized in that, described beam alignment system also comprises condenser lens.
12. light supply apparatus according to claim 11 is characterized in that, described beam alignment system also comprises extender lens.
13. light supply apparatus according to claim 1 is characterized in that, described is one of LED lamp, ultrahigh pressure mercury lamp, metal halid lamp, xenon lamp and Halogen lamp LED or its combination by additional light source.
14. a projector is characterized in that, described projector uses aforesaid right to require the light source of each described light supply apparatus of 1-13 as projector.
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| CNU2007201950365U2007201950365U CN201097088Y (en) | 2007-11-08 | 2007-11-14 | A light source device for projection system and projection display device |
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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 |
| CNU2007203057454U Expired - Fee Related CN201134006Y (en) | 2007-11-08 | 2007-11-16 | Light source for projection system and projection display device |
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| 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 |
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| 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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| CN201097088Y (en) * | 2007-11-08 | 2008-08-06 | 北京中视中科光电技术有限公司 | A light source device for projection system and projection display device |
-
2007
- 2007-11-14 CN CNU2007201950365U2007201950365U patent/CN201097088Y/en not_active Expired - Fee Related
- 2007-11-14 CN CN2007101878583A patent/CN101430492B/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
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Also Published As
| Publication number | Publication date |
|---|---|
| CN201104278Y (en) | 2008-08-20 |
| CN101430493A (en) | 2009-05-13 |
| CN201138418Y (en) | 2008-10-22 |
| CN101430492A (en) | 2009-05-13 |
| CN101430494A (en) | 2009-05-13 |
| CN201134006Y (en) | 2008-10-15 |
| CN101430491A (en) | 2009-05-13 |
| CN101430492B (en) | 2011-05-18 |
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