CN100533262C - Light source apparatus, optical apparatus, and image projection apparatus - Google Patents

Abstract

The invention discloses a light source apparatus is disclosed which allows effective cooling of an arc tube even with a small amount of wind. The light source apparatus has a light emitter and a reflector which reflects light from the light emitter and causes the reflected light to emerge. The light source apparatus also has a wind-guiding member which has a flow inlet and a flow outlet of cooling wind and has a wall portion at a position opposite to the flow inlet, the wall portion guiding the cooling wind toward the light emitter in the reflector. The light source apparatus which has a reflector to which an arc tube is fixed via a connecting member, and has a first flow path on which cooling wind from a fan flows to cool an area of the arc tube closer to the connecting member, and a second flow path on which cooling wind from the fan flows to cool an area of the arc tube closer to a light emitting portion. The second flow path is formed separately from the first flow path.

Description

Light supply apparatus, optical devices and image projection device

Technical field

The present invention relates to a kind of light supply apparatus that is used for optical devices such as image projection device, exposure device, duplicating machine, particularly relate to the cooling construction of light supply apparatus.

Background technology

Be used for the light source of above-mentioned optical devices, using luminotrons such as extra-high-pressure mercury vapour lamp.Occasion using such luminotron causes the outsides that fly out such as its fragment or mercury for the breakage that prevents luminotron, dispose the cover member (explosion-proof member) that is formed by light transmissive materials such as glass in front., the light that comes self-luminous body is reflected and the approximate seal construction of reverberator inner face of optically focused for this reason, become the heat that is difficult to as the luminotron of pyrotoxin and be discharged to outside formation towards predetermined direction.

On the other hand, for the operating pressure that improves luminotron so that luminotron has been given play to desired luminescent properties, need to improve the temperature of luminotron.But,, can not guarantee the long action of luminotron even the temperature of luminotron is too high.That is, as not with the temperature maintenance of luminotron in suitable scope, devitrification phenomenons such as the melanism of luminotron or albefaction then take place, it is unstable that action becomes.For this reason, need relative luminotron to carry out suitable cooling (with reference to Japanese kokai publication hei 8-314011 communique and Te Kai 2002-245842 communique).

In by the disclosed cooling construction of Japanese kokai publication hei 8-314011 communique, extraction fan is arranged at the behind of lamp assembly, suck air from the anterior upside of lamp assembly, the below from the bottom of lamp assembly by the lamp assembly is discharged to outside the casing from the exhausr port of being located at casing.

In addition, in by the disclosed cooling construction of TOHKEMY 2002-245842 communique, the air in the lamp accepting container is by the pressure fan exhaust of being located at the lamp rear portion, and tempering air flows to the lamp accepting container.The part of the tempering air that flows in the lamp accepting container is taken into from the air of being located at the lamp body front part and mouthful flow in the reverberator of lamp main body, and discharge from the air outlet of the neck of being located at reverberator the inside by reverberator.

Yet, in the cooling construction that proposes by Japanese kokai publication hei 8-314011 communique, though cooling air successfully flows near the peristome of reverberator, cooling air is difficult for touching near the luminotron the neck of being located at reverberator, has the low problem of cooling effectiveness of luminotron.

In addition, in by the disclosed cooling construction of TOHKEMY 2002-245842 communique, be located at the neck of reverberator and the vent port between the luminotron fixed part near reverberator and luminotron, so, can not obtain fully in order to be piled up in that high temperature air in the reverberator is discharged and the opening of the vent port that is provided with.For this reason, the low problem of cooling effectiveness that has luminotron.

By the rotating speed of raising vent fan, or vent fan is maximized,, may cause the increase or the whole maximization of device of noise though also can improve cooling effectiveness.

In addition, extra-high-pressure mercury vapour lamp by luminotron, reverberator, and engagement member constitute; This luminotron relatively disposes the electrode of negative electrode and anode in glass tube, enclose gas and mercury etc. in this glass tube; This reverberator has the catoptron that is used for the light from this luminotron is transformed into directional light; This engagement member is used to engage these luminotrons and reverberator.

Generally speaking, luminotron is fixed in reverberator 902 with the columned luminotron 901 of cardinal principle by engagement member 903 as shown in Figure 16.That is, luminotron 901 is disposed at the central authorities of reverberator 902, makes the focal position of face of catoptron of the inside that forms reverberator 902 and the illuminating part of luminotron 901 as one man be fixed in engagement member 903.Like this, can obtain to have improved the directional light of light gathering efficiency.

In addition, luminotron 901 has the 901a of spheroid portion (illuminating part), negative electrode sealing 901b, the 901c of anode seal portion, pillar weld part 901d.Have best cooling condition (recommended temperature range) in each one, for example the 901a of spheroid portion go up for more than or equal to 900 ℃ smaller or equal to 1000 ℃, be 900 ± 20 ℃ under the 901d of spheroid portion, negative electrode and the 901b of anode seal portion, 901c are smaller or equal to 420 ℃.

For this reason, in the past, TOHKEMY 2000-82322 communique is for example disclosed like that near the peristome of reverberator wind being sent into, cooled off the formation of luminotron.Specifically, taked such method, promptly, as shown in Figure 16, send into wind near the air entry 904 the reflector opening portion, wind is flowed along the reflecting surface of reverberator 902, the air behind the cooling ball body 901a is discharged from the exhausr port 905 of engagement member 903 sides.

In addition, the formation that discloses as shown in Figure 17 engagement member 903 sides air-supply, luminotron 901 is cooled off at TOHKEMY 2000-21230 communique from the rear of reverberator 902.

Yet, in order to make discharge lamp have the long-life, and stabilized illumination, form the formation of cooling high-voltage mercury discharging lamp, not only can be implemented in the cooling that drives in the recommended temperature range at each position of high-voltage mercury discharging lamp and constitute, and the cathode electrode when bright lamp adheres to mercury and is absolutely necessary.

About this point, in the open by above-mentioned TOHKEMY 2000-82322 communique, the 901c of anode seal portion of the leading section side of luminotron 901 is subjected to abundant cooling, but that temperature is the highest in luminotron 901 is the 901a of spheroid portion, and the wind behind the cooling ball body 901a has become the wind of the high temperature that cooling power descended.The negative electrode sealing 901b that is difficult to cool off fully the engagement member side by such wind.For example with the occasion of cathode arrangement in the engagement member side, the temperature of negative electrode sealing 901b becomes high temperature, has the danger of the fusing that metal part takes place.

And, when the back temperature of turning off the light descends, descend relative anode seal portion and spheroid portion of the temperature of negative electrode sealing is slower, so, be not attached to cathode side from gas to the mercury that liquid has produced state variation, but be attached to the anode-side that quickly falls to the temperature lower or the glass wall of spheroid portion than boiling temperature.

For this reason, when next time during bright lamp, the negative electrode unguard when above-mentioned phenomenon is carried out repeatedly, causes the negative electrode splash, causes melanism easily.That is the lost of life of lamp.

In addition, in the disclosed formation of TOHKEMY 2000-21230 communique, when for example anode arrangement being arrived the reverberator rear, the cathode side that is in the leeward of cooling air still is not vulnerable to cooling.In the cooling procedure after light-off, mercury is difficult to be attached to negative electrode, causes melanism.On the contrary, when for example cathode side being disposed at the reverberator rear, after the light-off, negative electrode is in the weather side of cooling air, so temperature descends and begins at first.For this reason, the mercury of liquefaction is attached to negative electrode, can form desirable state.

Yet, in the occasion of this formation, owing to send into air from the narrow and small reverberator rear of opening, so, when by air entry 905, cause the bigger pressure loss.For this reason, in the occasion of the lamp that uses high output, generation can not be sent into the problem of the cooling air of the 901a of spheroid portion that is used for cooling off fully luminotron 901.

Summary of the invention

Even one object of the present invention is to provide a kind of air quantity also can cool off the light supply apparatus of luminotron, the optical devices that use this light supply apparatus and image projection device less effectively.

In addition, another object of the present invention is to provide a kind of light supply apparatus, uses the optical devices and the image projection device of this light supply apparatus, this light supply apparatus can carry out the driving of lamp in recommended temperature range in the bright lamp process of lamp, simultaneously, and the temperature variations after having considered to turn off the light.

Light supply apparatus as a side of the present invention has luminophor and reflects the reverberator that makes its outgoing from the light of this luminophor.In addition, have the wind-guiding member, this wind-guiding member has the inflow entrance and the flow export of cooling air, and has this cooling air towards the side directed wall portion of the above-mentioned luminophor in the above-mentioned reverberator in the position relative with above-mentioned inflow entrance.

In addition, the light supply apparatus as another side of the present invention has fan, luminotron, reverberator, the 1st stream, reaches the 2nd stream; This luminotron to the configuration negative electrode and anode between have illuminating part; This reverberator is fixed this luminotron by engagement member; The 1st stream is used to flow through the cooling air from said fans, with the zone of the engagement member side of cooling off above-mentioned luminotron; The 2nd stream is used to flow through the cooling air from said fans, with the zone of the illuminating part side of cooling off above-mentioned luminotron.The 2nd stream is the stream outside above-mentioned the 1st stream.

Other purpose of the present invention or feature can become clear and definite according to the preferred embodiment of reference the following drawings explanation.

Description of drawings

Fig. 1 is the decomposition diagram of image projection device with light supply apparatus of the embodiment of the invention 1.

Fig. 2 illustrates the figure that the optics of the image projection device of embodiment 1 constitutes.

Fig. 3 is the decomposition diagram of the light supply apparatus of embodiment 1.

Fig. 4 is the plan cross-sectional view of the light supply apparatus of embodiment 1.

Fig. 5 is the skeleton view of the light supply apparatus of embodiment 1.

Fig. 6 is the skeleton view of the light supply apparatus of the embodiment of the invention 2.

Fig. 7 is the ground plan of the light supply apparatus of embodiment 2.

Fig. 8 is the plan cross-sectional view of the light supply apparatus of the embodiment of the invention 3.

Fig. 9 is the decomposition diagram of the light supply apparatus of the embodiment of the invention 4.

Figure 10 is the figure that flows of the cooling air in the light supply apparatus of explanation embodiment 4.

Figure 11 is the figure that flows of the cooling air in the light supply apparatus of explanation embodiment 4.

Figure 12 is the temperature changing curve diagram of the effect of expression present embodiment.

Figure 13 is the decomposition diagram of the light supply apparatus of the embodiment of the invention 5.

The decomposition diagram of the light supply apparatus of Figure 14 embodiment 5.

Figure 15 is for illustrating the figure of the structure of the mercury discharge lamp of use in an embodiment.

Figure 16 is the figure of explanation prior art example.

Figure 17 is the figure of explanation prior art example.

Embodiment

Below, with reference to description of drawings the preferred embodiments of the present invention.

Below, with reference to the description of drawings embodiments of the invention.

(embodiment 1)

(whole formation)

The formation of one image projection device (projector) as optical devices shown in Figure 1, these optical devices have the light supply apparatus of the embodiment of the invention 1.In Fig. 1, symbol 1 is the lamp assembly, and symbol 2 is for keeping the lamp retainer of lamp assembly 1, and symbol 3 is an implosion guard, and symbol 4 is the glass pressed component.

α is the illumination optical system from the light incident of lamp assembly 1, and β is for carrying out color separation to the ejaculation light from illumination optical system α and guiding to the color separation synthesizing optical system of the liquid crystal board (image formation component) that the RGB3 look uses.

Symbol 5 will be for will being the projecting lens lens barrel that the emergent light of β projects not shown screen (being projected face) from the color separation synthesizing optical.In projecting lens lens barrel 5, contain projecting lens optical system described later.

Symbol 6 is an optical box, is used to accommodate illumination optical system α and the color separation synthesizing optical is β, and simultaneously, fixedly the projecting lens lens barrel 5.Form the lamp housing body 6a on every side that surrounds lamp assembly 1 at this optical box 6.

Symbol 7 is for being that β is contained in the optics case lid of adding a cover under the state in the optical box 6 with illumination optical system α and color separation synthesizing optical.Symbol 8 is a power supply, and symbol 9 is a power-supply filter, and symbol 10 is for making the ballast power supply of lamp assembly 1 bright lamp, the circuit board that symbol 11 is served as reasons and from the electric power of power supply 8 the bright lamp of the driving of liquid crystal board and lamp assembly 1 controlled.

Symbol 12 is the optical system cooling fan, thereby this optical system cooling fan 12 is by from the air entry 21a suction air cooling color separation synthesizing optical that encapsulates cabinet 21 being the optical elements such as liquid crystal board in the β; Symbol 13 is a fan pipeline, and being used for the cooling air that optical system cooling fan 12 takes place is delivered to the color separation synthesizing optical is optical elements such as liquid crystal board in the β.

Symbol 14 is configured between lamp assembly 1 and the projecting lens lens barrel 5 for relative lamp assembly 1 winding-up cooling air, to the lamp cooling fan that lamp assembly 1 cools off.

Symbol 15 is for keeping the fan retaining member of lamp cooling fan 14.Symbol 16 is the fan pressing plate, symbol 17 is the power supply cooling fan, this power supply cooling fan 17 is by sucking air from the air entry 21b that is located at encapsulation cabinet 21 described later, thereby cooling air is circulated in power supply 8, and make winding-up distinguished and admirablely lead to ballast power supply 10, thereby cool off power supply 8 and ballast power supply 10 simultaneously.

Symbol 18 is a vent fan.This vent fan 18 will blow out, pass through the hot blast of lamp assembly 1 and the hot blast behind the cooling ballast power supply 10 from lamp cooling fan 14, be discharged to outside the image projection device from the exhausr port 24a that is located at encapsulation side plate 24 described later.

Symbol 19 is a light heat radiation board.Symbol 20 is lamp bank gas/light shield, has the heat sinking function of lamp assembly 1 and makes the function of the ventilation duct that the hot blast of cool down lamp assembly 1 passes through, and in addition, also has the light that prevents from lamp assembly 1 and drains to the outer shade function of device.

Symbol 21 forms above-mentioned suction hole 21a, 21b for accommodating the encapsulation cabinet (encapsulation lower case) of optical box 6 grades at this encapsulation cabinet 21.The encapsulation cabinet lid (encapsulation upper body) of symbol 22 under the state that optical box 6 grades is contained in encapsulation cabinet 21, adding a cover.Symbol 23 is for being disposed at the encapsulation side plate in left side when the place ahead of projecting lens lens barrel 5 is watched, symbol 24 is for being disposed at the encapsulation side plate on identical right side.Form above-mentioned exhausr port 24a at encapsulation side plate 24.

Symbol 25 is the element cooling fan of the optical elements such as polarization element of β for being used to cool off formation color separation synthesizing optical.This element cooling fan 25 will arrive above-mentioned optical element from the air blown of the not shown suction hole that encapsulates cabinet 21 by being formed at the not shown pipe section of encapsulation cabinet 21.

Symbol 26 is for being installed on the interface stiffening plate of the inboard that encapsulates side plate 23.Symbol 27 is the package cooling plate, is installed on lamp housing body 6a, carries out the heat radiation from the heat of lamp assembly 1.

Symbol 28 is a light cover.This light cover 28 can be located at the bottom surface of encapsulation cabinet 21 with freely installing and removing, by not shown screw retention.In addition, symbol 29 is provided with the adjustment pin for what be fixed in encapsulation cabinet 21, and this is provided with adjusts the height that pin 29 can be adjusted the 29a of its foot.By adjusting the height of the 29a of foot, thereby can adjust the angle of inclination of image projection device.

(optics formation)

Below, by above-mentioned lamp assembly 1, illumination optical system α, color separation synthesizing optical the formation of the image display optical system of projecting lens optical system 70 formations in β, reflection type liquid crystal display element (liquid crystal board) and the projecting lens lens barrel 5 according to Fig. 2 explanation.

In Fig. 2, symbol 41 is the luminotron of the extra-high-pressure mercury vapour lamp that sends white light by continuous spectrum etc., symbol 42 for reflection from the light of luminotron 41, towards the reverberator of predetermined direction optically focused.Constitute lamp assembly 1 by luminotron 41 and reverberator 42.γ is the optical axis of image projection optical system, and expression is from the direct of travel of the light of lamp assembly 1.

Symbol 43a is the 1st cylindrical-array, and the lens arra that is had refracting power by the vertical direction (being designated hereinafter simply as vertical direction) of paper at relative Fig. 2 constitutes; Symbol 43b is the 2nd cylindrical-array, has the corresponding lens arra of each lens with the 1st cylindrical-array 43a.

Symbol 44 is the UVA light filter, and symbol 45 is for to make no polarized light unification become the polarization conversion element of the light of predetermined polarization direction.

Symbol 46 serve as reasons in the horizontal direction (face of the paper of Fig. 2 in direction) have the preceding compressor reducer that the cylindrical lens of refracting power constitutes, symbol 47 carries out the catoptron of 90 degree direction transformations for making optical axis γ.Symbol 48 is a condenser, the symbol 49 back compressor reducer that the cylindrical lens that has refracting power in the horizontal direction constitutes of serving as reasons.By constitute illumination optical system α with top.

Symbol 58 is a dichroscope, is used for the light of the wavelength region may of reflection blue (B) and red (R), the light of the wavelength region may of transmit green (G).Symbol 59 is for being pasted on polarization element the light incident side Polarizer of the green usefulness of transparency carrier, only transmission S polarized light.Symbol 60 has polarisation parting plane (polarisation diffusion barrier) for the 1st polarized beam splitting device of transmission P polarized light, reflection S polarized light between the glass blocks of 1 pair of triangular prism shape.

Symbol 61R, 61G, 61B are respectively the light of incident are reflected and carry out the reflection type liquid crystal display element of the reflection type liquid crystal display element of the redness usefulness of image modulation, green usefulness, the reflection type liquid crystal display element of blue usefulness.Connect its driving circuit that drives 110 at this liquid crystal display cells 61R, 61G, 61B, connect image information feedwaies 120 such as personal computer, DVD player, video recording tape transport, TV tuner at this driving circuit 110.Reflection (image) information that driving circuit 110 receives from image information feedway 120 forms original painting corresponding to this map information at liquid crystal display cells 61R, 61G, 61B.

Symbol 62R, 62G, 62B are respectively 1/4 wavelength plate of 1/4 wavelength plate of 1/4 wavelength plate of red usefulness, green usefulness, blue usefulness.Symbol 64 has been for to have pasted the light incident side Polarizer of the green and the blue usefulness of polarization element at transparency carrier, only transmission S polarized light.

Symbol 65 carries out the 1st look selectivity polarizer of the not conversion of polarization direction of 90 degree conversion, red light for the polarization direction to blue light.Symbol 66 has polarisation parting plane (polarisation diffusion barrier) for the 2nd polarized beam splitting device of reflection S polarized light between the glass blocks of 1 pair of triangular prism shape.Symbol 67 carries out the 2nd look selectivity polarizer of the not conversion of polarization direction of 90 degree conversion, blue light for the polarization direction to red light.

Symbol 68 is the exiting side Polarizer (polarization element) of red and blue usefulness, only transmission S polarized light.Symbol 69 is as the 3rd polarized beam splitting device of the look synthesizing optical member of transmission P polarized light, reflection S polarized light, has polarisation parting plane (polarisation diffusion barrier) between the glass blocks of 1 pair of triangular prism shape.

Constituting the color separation synthesizing optical by dichroscope 58 to the 3rd polarized beam splitting devices 69 of above explanation is β.

(optical effect)

Below, the effect of the optics that above-mentioned image display optical is is described.The light that sends from luminotron 41 is reflected by reverberator 42, towards predetermined direction optically focused.Reverberator 42 has parabolic shape, becomes the light beam that is in substantially parallel relationship to paraboloidal axis of symmetry from the light of paraboloidal focal position.But, not desirable pointolite from the light source of luminotron 41, have limited size, so, in the light beam of assembling, contain the composition of many not parallel light with paraboloidal axis of symmetry.These light beams incide the 1st cylindrical-array 43a.

The light beam that incides the 1st cylindrical-array 43a is cut apart and is converged to a plurality of light beams corresponding with each cylindrical lens, becomes a plurality of light beams of the band shape of extending towards horizontal direction.These a plurality of light beams pass through UVA light filter 44, via the 2nd cylindrical-array 43b, and near formation focus polarization conversion element 45.

Polarization conversion element 45 by polarisation parting plane, reflecting surface, and 1/2 wavelength plate constitute, above-mentioned a plurality of light beams incide and the corresponding polarisation parting plane of each light beam row, are divided into the P polarized light component of transmission and the S polarized light component of reflection.The S polarized light component of reflection is reflected by reflecting surface, towards the direction outgoing identical with the P polarized light component.On the other hand, light transmission 1/2 wavelength plate of the P polarized light component of transmission becomes the polarized light component identical with the S polarized light component.Like this, penetrate the light of having unified polarization direction from polarization conversion element 45.

The a plurality of light beams that carried out the polarisation conversion carry out 90 degree reflections by preceding compressor reducer 46 by catoptron 47, arrive condenser 48 and back compressor reducer 49.Before compressor reducer 46, condenser 48, and back compressor reducer 49 by the rectangle picture of the overlapped above-mentioned a plurality of light beams of effect of its optics, form the uniform field of illumination of rectangle.At this field of illumination configuration reflection type liquid crystal display element 61R, 61G, 61B.

The light that is formed the S polarized light by polarization conversion element 45 incides dichroscope 58.Dichroscope 58 reflection blues (430～495nm) and red (590～650nm) light, transmit green (505～580nm) light.

Below, the light path of green glow (to call G light in the following text) is described.The G light that sees through dichroscope 58 incides light incident side Polarizer 59.G light also becomes the S polarized light after being decomposed by dichroscope 58.G light is after 59 outgoing of light incident side Polarizer, and relative the 1st polarized beam splitting device 60 is as the incident of S polarized light, and the polarisation parting plane reflection by the 1st polarized beam splitting device 60 arrives the reflection type liquid crystal display element 61G that G uses.

At the reflection type liquid crystal display element 61G that G uses, G light is carried out the image modulation back reflection.Carried out S polarized light component in the G light (reflected light) of image modulation once more by the polarisation parting plane reflection of the 1st polarized beam splitting device 60, turned back to light source side, from projection light, removed.On the other hand, carried out the polarisation parting plane that P polarized light component in the G light of image modulation sees through the 1st polarized beam splitting device 60, as projection light directive the 3rd polarized beam splitting device 69.At this moment, under the state that all polarized light components is transformed into the S polarized light (the black state that shows), the slow axis of being located at 1/4 wavelength plate 62G between the reflection type liquid crystal display element 61G that the 1st polarized beam splitting device 60 and G use is adjusted to predetermined direction, thereby the influence of the disorder of the polarized condition that the reflection type liquid crystal display element 61G that uses at the 1st polarized beam splitting device 60 and G can be taken place suppresses lessly.

Incide the 3rd polarized beam splitting device 69 from the G light of the 1st polarized beam splitting device 60 outgoing as the P polarized light, see through the polarisation parting plane of the 3rd polarized beam splitting device 69, arrive projecting lens optical system 70.

On the other hand, incide light incident side Polarizer 64 at redness that dichroscope 58 is reflected and blue light (below be called R light, B light).R light and B light also become the S polarized light after being decomposed by dichroscope 58.R light and B light incide the 1st look selectivity polarizer 65 after 64 outgoing of light incident side Polarizer.The 1st look selectivity polarizer 65 has the polarization direction that makes B light and returns the effect that turn 90 degrees, and like this, B light incides the 2nd polarized beam splitting device 66 as the P polarized light, and R light incides the 2nd polarized beam splitting device 66 as the S polarized light.Incide of the polarisation parting plane reflection of the R light of the 2nd polarized beam splitting device 66 as the S polarized light, arrive the reflection type liquid crystal display element 61R that R uses by the 2nd polarized beam splitting device 66.

In addition, incide the polarisation parting plane of B light transmission the 2nd polarized beam splitting device 66 of the 2nd polarized beam splitting device 66, arrive the reflection type liquid crystal display element 61B that B uses as the P polarized light.

The R light that incides the reflection type liquid crystal display element 61R that R uses is reflected after the image modulation carrying out.Carried out S polarized light component in the R light (reflected light) of image modulation once more by the polarisation parting plane reflection of the 2nd polarized beam splitting device 66, turned back to light source side, from projection light, removed.On the other hand, carried out the polarisation parting plane that P polarized light component in the R light of image modulation sees through the 2nd polarized beam splitting device 66, as projection light directive the 2nd look selectivity polarizer 67.

In addition, the B light that incides the reflection type liquid crystal display element 61B that B uses is reflected after the image modulation carrying out.Carried out P polarized light component in the B light (reflected light) of image modulation and seen through the polarisation parting plane of the 2nd polarized beam splitting device 66 once more, turned back to light source side, from projection light, removed.On the other hand, carried out S polarized light component in the B light of image modulation by the polarisation parting plane reflection of the 2nd polarized beam splitting device 66, as projection light directive the 2nd look selectivity polarizer 67.

At this moment, be located at 1/4 wavelength plate 62R between reflection type liquid crystal display element 61R, the 61B that the 2nd polarized beam splitting device 66 and R use with, B, the slow axis of 62B, thereby can similarly carry out the adjustment of the black demonstration of R, B light respectively with the occasion of G light by adjustment.

Synthesize 1 light beam like this, the R light from the projection light of the R of the 2nd polarized beam splitting device 66 outgoing and B is turn 90 degrees for 67 times by the 2nd look selectivity polarizer, becomes the S polarized light component, then, by exiting side Polarizer 68 inspection light, incides the 3rd polarized beam splitting device 69.In addition, B light keeps the state of S polarized light to see through the 2nd look selectivity polarizer 67, by exiting side Polarizer 68 inspection light, incides the 3rd polarized beam splitting device 69 then.By by exiting side Polarizer 68 inspection light, thus the projection light of R and B is become clipped since by the 2nd polarized beam splitting device 66 and R with, the light of reflection type liquid crystal display element 61R, 61B that B uses, invalid components that 1/4 wavelength plate 62R, 62B produce.

Incide the polarisation parting plane reflection of the projection light of the R of the 3rd polarized beam splitting device 69 and B by the 3rd polarized beam splitting device 69, the G light compositing with by this above-mentioned polarisation parting plane reflection arrives projecting lens optical system 70.Like this, the projection light of He Cheng R, G, B is projected face by projecting lens optical system 70 enlarging projections to screen etc.

More than Shuo Ming light path is the occasion that reflection type liquid crystal display element is in white show state, so below the explanation reflection type liquid crystal display element is in the effect of the optics under the occasion of deceiving show state.

The light path of G light at first, is described.The G light (S polarized light) that sees through dichroscope 58 incides light incident side Polarizer 59, after this, incides the 1st polarized beam splitting device 60, by its polarisation parting plane reflection, arrives the reflection type liquid crystal display element 61G that G uses.Yet, because reflection type liquid crystal display element 61G is black show state, so the state that G light keeps not carrying out image modulation is reflected.Therefore, also still be the S polarized light by reflection type liquid crystal display element 61G reflection back G light, by the polarisation parting plane reflection of the 1st polarized beam splitting device 60, see through light incident side Polarizer 59 and turn back to light source side once more, from projection light, remove.

Below, the light path of R light and B light is described.The R light and the B light (S polarized light) that have been reflected by dichroscope 58 incide light incident side Polarizer 64.R light and B light incide the 1st look selectivity polarizer 65 after 64 outgoing of light incident side Polarizer.The 1st look selectivity polarizer 65 has the polarization direction that only makes B light and returns the effect that turn 90 degrees, and like this, B light incides the 2nd polarized beam splitting device 66 as the P polarized light, and R light incides the 2nd polarized beam splitting device 66 as the S polarized light.

Incide of the polarisation parting plane reflection of the R light of the 2nd polarized beam splitting device 66 as the S polarized light, arrive the reflection type liquid crystal display element 61R that R uses by the 2nd polarized beam splitting device 66.In addition, incide the polarisation parting plane of B light transmission the 2nd polarized beam splitting device 66 of the 2nd polarized beam splitting device 66, arrive the reflection type liquid crystal display element 61B that B uses as the P polarized light.

Here, the reflection type liquid crystal display element 61R that R uses is owing to be black show state, so the R light that incides the reflection type liquid crystal display element 61R that R uses is not reflected with not carrying out image modulation.Therefore, after the reflection type liquid crystal display element 61R reflection of being used by R, R light also remains the S polarized light, by the polarisation parting plane reflection of the 1st polarized beam splitting device 60, by light incident side Polarizer 64, turns back to light source side once more, removes from projection light.That is, become black the demonstration on the face being projected.

On the other hand, because the reflection type liquid crystal display element 61B that uses of B is black show state, so the B light that incides the reflection type liquid crystal display element 61B that B uses is not reflected with not carrying out image modulation.Therefore, after the reflection type liquid crystal display element 61B reflection of using by B, B light also remains the P polarized light, see through the polarisation parting plane of the 1st polarized beam splitting device 60 once more, be transformed into the S polarized light by the 1st look selectivity polarizer 65, see through light incident side Polarizer 64, turn back to light source side, from projection light, remove.

(light supply apparatus)

Below, the cooling construction of the light supply apparatus of present embodiment is described according to Fig. 3～Fig. 5.Light supply apparatus 80 has lamp assembly 1, keeps the lamp retainer 2 of this lamp assembly 1 and is in lamp assembly 1 and the elastic component 83,84,85 of 2 of lamp retainers.In addition, light supply apparatus 80 have lamp retainer pedestal 82, as the implosion guard 3 of light transmission cover, and glass pressed component 4; This lamp retainer pedestal 82 has the formation that can be installed on lamp retainer 2 and optical box 6; This implosion guard 3 is arranged at the front of lamp retainer 2; This glass pressed component 4 is used for implosion guard 3 is remained in lamp retainer 2.

In the side of light supply apparatus 80 lamp cooling fan 14 is set, this lamp cooling fan 14 is an aerofoil fan.Keep platform 15 at the fan that is provided with in order to keep lamp cooling fan 14, form the fan pipeline 15a that is used for cooling air is blown into the inflow entrance 2a of lamp retainer 2.

Lamp assembly 1 is made of luminotron 81 and reverberator 42, luminotron 41 have the focal position that is disposed at reverberator 42 as the pipe bulb 81 of luminophor and the position 81 of stretching out towards the front and back in this pipe bulb 81 ', 81 ".Lamp assembly 1 is contained in the lamp housing body 6a (with reference to Fig. 1) of optical box 6.

Lamp retainer 2 also works as said wind-guiding member among the present invention.In sides part, lamp cooling fan 14 sides of the shaped as frame shape in reverberator 42 the place aheads of this lamp retainer 2 (being light exit side), the inflow entrance 2a that is formed for making the cooling air from lamp cooling fan 14 to flow into.At inflow entrance 2a window shutter 86 is set, this window shutter 86 is used for making this cooling air to flow into the vertical substantially direction of optical axis γ shown in the single-point line with Fig. 5 from relative Fig. 4.

In addition, parts lamp retainer 2, reverberator 42 the place aheads, with the side of the side thereof opposite side of lamp cooling fan 14 1 sides in the position relative substantially with inflow entrance 2a, form air guiding wall portion 87.

In other words, inflow entrance 2a extends along the direction parallel with this optical axis γ at opposition side across emergent light axis (consistent with the optical axis of the image projection optical system) γ of reverberator 42 mutually with air guiding wall portion 87.

In addition, be formed for discharging flow export 2b, the 2c of the high temperature air in the reverberator 42 in the both sides up and down of the air guiding wall portion 87 of this side.

In such formation, when connecting the power supply of image projection device, the pipe bulb 81 of luminotron 41 is luminous, makes the temperature of lamp assembly 1 rise, and in addition, accompanies therewith, and the temperature of the air that lamp housing body 6a (with reference to Fig. 4) and light supply apparatus are 80 rises.

The connection of power supply makes lamp cooling fan 14 begin revolution.Like this, as illustrating with arrow among Fig. 4 and Fig. 5, keep the fan pipeline 15a of platform 15 and inflow entrance 2a to flow into from the cooling air of lamp cooling fan 14 from being integrally formed at fan.At this moment, cooling air makes that the vertical direction of relative optical axis γ cardinal principle is main inflow direction because the effect of window shutter 86 produces directivity, is blown into by reverberator 42, lamp retainer 2, reaches the space that implosion guard 3 surrounds.

From relative optical axis γ substantially the vertical direction cooling air that is blown into this space flow to air guiding wall portion 87 as illustrating with arrow Fig. 4 and Fig. 5 while cool off the leading section (81 ') of implosion guard 3 and luminotron 41.The cooling air that touches air guiding wall portion 87 is stoped towards the place ahead by implosion guard 3 and flows, so, promptly manage bulb 81 towards the interior side of reverberator 42 and flow to the rear.Then, blow to pipe bulb 81, it is cooled off as pyrotoxin while this cooling air cools off the inner face of reverberator 42.

The cooling air that has cooled off the inner face of reverberator 42 and pipe bulb 81 is as illustrating with arrow among Fig. 4 or Fig. 5, part along the inflow entrance 2a side in the inner face of reverberator 42 flows towards the place ahead, be discharged to light supply apparatus 80 from flow export 2b, the 2c of the both sides up and down of being located at air guiding wall portion 87, and then be discharged to outside the optical box 6 from the opening 6b that is formed at lamp housing body 6a.

Like this,, forcibly cooling air is delivered to pipe bulb 81 sides in the reverberator 42, after this discharged by air guiding wall portion 87 (with implosion guard 3) according to present embodiment, so, the pipe bulb 81 that can should suitably cool off by the good efficiency cooling.

At this moment, the direction that flows to a series of cooling air of flow export 2b, 2c from inflow entrance 2a does not change sharp, so, can be directly and cooling tube bulb 81 quantitatively.That is, can be by less air quantity cooling tube bulb 81 expeditiously, so, can must be lower with the speed setting of lamp cooling fan 14, can suppress the generation of noise.In addition, can make 14 miniaturizations of lamp cooling fan, so, also favourable to the miniaturization of image projection device integral body.

In addition, the opening 15b of cooling air beyond pipeline 15a that is taken place by lamp cooling fan 14 jets as illustrating with arrow Fig. 4 and Fig. 5 like that towards the space of 80 of lamp housing body 6a and light supply apparatuses and the outside of reverberator 42, is discharged to outside the optical box 6 from the opening 6b that is formed at lamp housing body 6a.

Like this, do not pile up high temperature air in the space of 80 of lamp housing body 6a and light supply apparatuses, in addition, reverberator 42 is also cooled off by good efficiency.

Like this, the interior outside of cooling air cooling luminotron (pipe bulb 81) and reverberator 42, in addition, by 80 of lamp housing body 6a and light supply apparatuses, be discharged to outside the optical box 6 from the opening 6b that is formed at lamp housing body 6a, this cooling air is discharged to outside the image projection device from the exhausr port 24a that is located at encapsulation side plate 24 by vent fan 18 shown in Figure 1.

Temperature behind the air of the high temperature of discharging from flow export 2b, 2c and the outside of cooling reverberator 42 etc. is discharged from the opening 6b that is formed at lamp housing body 6a than its low cooling air, thereby two cooling airs obtain stirring.For this reason, can reduce the temperature that is discharged to the outer air of image projection device by vent fan 18.

In addition, in the present embodiment, near the lamp retainer 2 of lamp assembly 1, lamp retainer pedestal 82, and lamp housing body 6a (optical box 6) constitute by heat-resisting nonflammable resin materials such as poly-p-phenylene sulfides.In this occasion, by as present embodiment, using aerofoil fan, thereby cooling air is blown to this resin material as lamp cooling fan 14, prevent the deterioration that thermal conductance causes, the result, permanance improves.

Here, describe the reason that 2 systems are set as described above in detail, 1 system in these 2 systems directly flows out the cooling air from inflow entrance from flow export, 1 system makes cooling air touch air guiding wall portion for the moment and circulation in reverberator 42 in addition, flows out then.

At first, only be to make from the cooling air of inflow entrance directly from the occasion of the system that flow export flows out, it is main taking the lead in discharging the air flow that is piled up in the high temperature air in the reverberator.For this reason, cooling air is difficult for flowing to the pipe bulb as the luminotron of pyrotoxin, and there is the tendency that cooling effectiveness descends in pyrotoxin relatively.

On the other hand, for making cooling air be contacted with the occasion of the system that air guiding wall portion flows out after circulating, cooling air is easy to be blown into the pipe bulb, so there is the tendency that cooling effectiveness improves in pyrotoxin relatively only.Yet, big as the volume ratio pipe bulb in the reverberator, there is not to discharge the system that is piled up in the high temperature air in the reverberator, the temperature of the cooling air that flows towards the pipe bulb raises the tendency that exists cooling effectiveness to descend.

For this reason, make from the cooling air of inflow entrance directly from system that flow export flows out and make cooling air be contacted with such 2 systems of system that the back flows out that circulate of air guiding wall portion for the moment by having, thereby can reduce the temperature of lamp assembly effectively than above-mentioned each occasion.

(embodiment 2)

Formation at the light supply apparatus of the embodiment of the invention 2 shown in Fig. 6 and Fig. 7.In the present embodiment, be that the center describes with the part that is different from the foregoing description 1.In addition, in the present embodiment,, adopt the symbol replacement explanation identical with embodiment 1 to the component part identical with embodiment 1.

In the light supply apparatus 90 of present embodiment, except in lamp retainer 2 with flow export 2b, 2c that the side of the side thereof opposite side that inflow entrance 2a is set and air guiding wall portion 87 are provided with, also be provided with flow export 2d, 2e in the top and bottom of lamp retainer 2.Like this, make the aperture area of total open area ratio inflow entrance 2a of flow export 2b, 2c, 2d, 2e big.

It is the reasons are as follows.Flow into the temperature of the air in the reverberator 42 relatively, the air that blows out from flow export becomes high temperature because reducing the temperature of luminotron.That is, the air that blows out from flow export is heated when flowing into and expands, and volume is heated and expands, and volume increases.Therefore, need increase the area of flow export than inflow entrance corresponding to the amount of the increase of volume.

In such formation, cooled off the cooling air in pipe bulb 81 through path similarly to Example 1 and discharged from flow export 2b, 2c, 2d, 2e.At this moment, similarly to Example 1, the direction that flows to a series of cooling air of flow export 2b, 2c, 2d, 2e from inflow entrance 2a does not sharply change, so, can be quantitatively and cooling tube bulb 81 effectively.In addition, total aperture area of flow export 2b, 2c, 2d, 2e is set by the aperture area of the inlet of relative current as described above 2a, thereby can successfully cooling be comprised all and reverberator 42 of the luminotron 41 of managing bulb 81 and make temperature rising, volumetric expansion cooling air, successfully be discharged to outside reverberator 42 and the light supply apparatus 80.Like this, can obtain higher cooling effect.

That is, because the available air quantity that lacks than embodiment 1 cool down lamp assembly 1 effectively, so, can make the lamp cooling fan 14 further slow-speed of revolutionization (air quantityization less), can further suppress the generation of noise.In addition, can also can realize the further miniaturization of lamp cooling fan 14.

In addition, by forming more flow export 2b, 2c, 2d, 2e (being formed on a plurality of directions) than embodiment 1, thereby can further stir the high temperature air of discharging from this flow export 2b, 2c, 2d, 2e and cool off the cooling air than its low temperature of the outside of reverberator 42, can reduce the temperature that is discharged to the outer air of image projection device by vent fan 18.

In addition, descend owing to be blown into the temperature of the air of vent fan 18, so, can prevent that heat from making the lost of life of vent fan 18, can improve permanance.

(embodiment 3)

Fig. 8 illustrates the formation of the light supply apparatus of the embodiment of the invention 3.In the present embodiment, be that the center describes with the part that is different from the foregoing description 1.In addition, in the present embodiment,, adopt the symbol replacement explanation identical with embodiment 1 to the component part identical with embodiment 1.

In the light supply apparatus 95 of present embodiment, be formed in the air guiding wall portion 87 that has flat shape among the embodiment 1 by curved surface.This curved surface is to be suitable for more successfully the shape that in the reverberator 42 side sends into the cooling air that flows into from inflow entrance 2a through similarly to Example 1 path.Like this, can be basically can not weaken wind speed ground cooling air is blown to pipe bulb 81 owing to cooling air is contacted with air guiding wall portion 87.Like this, can obtain the cooling effect in higher pipe bulb 81.

Therefore, compare with embodiment 1,2, can be by still less air quantity (rotating speed) or more small-sized fan cooled lamp assembly 1.

As described above,, can cool off pipe bulb 81 expeditiously by less air quantity as luminophor according to the various embodiments described above, so, can realize the slow-speed of revolutionization and the miniaturization of lamp cooling fan 14, help the low noiseization and the miniaturization of image projection device.

And, need self not become the inflow entrance of cooling air and the openings such as otch of flow export at reverberator 42, so, the processing cost of reverberator (lamp assembly) can be reduced.

In the foregoing description 1～3, having illustrated that thereby the inflow entrance of the cooling air by forming light supply apparatuses at lamp retainer 2 and flow export make need self not form the example of inflow entrance and flow export at reverberator 42, but the invention is not restricted to this, also can in inflow entrance and the flow export at least one be set at reverberator.

In addition, in embodiment 1～3, illustrated that the light exit side at reverberator is the occasion of the place ahead arranged outside air guiding wall portion, but also can the inboard of reverberator, reverberator is to the less area configurations air guiding wall portion of reflection of light influence.

In addition, in embodiment 1～3, illustrated by being disposed at the aerofoil fan that flows into oral-lateral cooling air is blown into occasion in the light supply apparatus, but in the present invention, the kind of fan is not limited to aerofoil fan, also can use other fans such as Sirocco fan, cross flow fan.In addition, also can be by sucking air in the light supply apparatus and make the cooling airflow generation that flows into from inflow entrance by being located at the fan that flows out oral-lateral.

(embodiment 4)

In Fig. 9 and Figure 10, the light supply apparatus 200 as the embodiment of the invention 4 is described.The type of cooling of the light supply apparatus that present embodiment is later is different with the foregoing description 1～3.But, be the device of explanation in embodiment 1 as the image projection device of the optical devices that are suitable for the later light supply apparatus of present embodiment.

Lamp assembly (for example UHV (ultra-high voltage) mercury discharge lamp) 201 as shown in Figure 9, by luminotron 101, reverberator 102, and engagement member 103 constitute; This luminotron 101 is relatively configured electrodes sealing 101b and 101c in the inside of the 101a of spheroid portion; This reverberator 102 is used in the future, and the light of spontaneous light pipe 101 is transformed into directional light; This engagement member 103 is used for after luminotron 101 and reverberator 102 are located optically it being engaged.

Here, the either party of electrode sealing 101b and 101c is that negative electrode, the opposing party get final product for anode, but in the present embodiment, 101b is described as the negative electrode sealing as anode seal portion, 101c.

In addition, at engagement member 103 towards upper and lower to being provided with opening (not shown), at the opening of this engagement member 103 for example netted filtrator is installed.

Lamp assembly 201 is fixed in lamp retainer 202 by pushing members (not shown) such as springs.Be provided with the opening 202a and the opening (not shown) that becomes the outlet of cooled wind of the inlet that becomes cooling air at lamp retainer 202.In addition, by glass pressed component 204 front glass (implosion guard) 203 is installed at lamp retainer 202.In addition, form air guiding wall 2b at lamp retainer 202, this air guiding wall 2b has such shape, that is, make the cooling air that comes along the bottom surface sections stream of this lamp retainer 202 produce directivity towards the peristome of engagement member 103 (negative electrode sealing 101c).

In this formation,, also can be the formation that the opening (not shown) that the opening 202a and the exhaust of air-breathing usefulness are used is located at reverberator 102 though a plurality of openings are located at lamp retainer 202.In addition, also can be the formation that front glass 203 also is adhered to reverberator 102,, do not need glass pressed component 204 in this occasion.

In addition, at the side of lamp assembly 201 configuration cooling fan 214, cooling fan 214 is fixed in the fan with a plurality of openings by fan pressing plate 216 and keeps platform 215.

By forming such formation, the cooling air of sending from fan 214 is by being located at the opening 215a that fan keeps platform 215.The part of this cooling air is sent to reverberator 102 inside from the opening 202a that is located at lamp retainer 202.The zone of the 101b of the anode seal portion side of this cooling air cooling luminotron 101, by running into the wall of the position relative of being located at lamp retainer 202, thereby flow to the 101a of spheroid portion of luminotron 101 like that along the wall arrow as shown in Figure 4 of reverberator 102 with opening 202a.Like this, cooling becomes the 101a of spheroid portion of maximum temperature, and flows along the internal face of reverberator 102, from the opening 202c exhaust of lamp retainer 202.

On the other hand, as shown in Figure 11, another part of the cooling air of sending from fan 214 keeps opening 215b platform 215, outside the above-mentioned opening 202a by being located at fan.Then, concentrate, under the state that wind speed and blast are improved, from being located at the opening 103a air-supply of engagement member 103 by the air guiding wall 202b that is located at lamp retainer 202.Deliver to the negative electrode sealing 101c of cooling air cooling luminotron 101 of inside of engagement member 103 from opening 103a after, from the opening 103b exhaust of engagement member 103.

At this moment, be located at reverberator 102 rears and connecting portion engagement member 103, can positioning and be provided with regularly opening 102a luminotron 101.Yet the opening of opening 102a is narrow, form air by the time resistance.And, in the present embodiment, owing to blow from the air-breathing opening 103a with opening 202a and engagement member 103 of reverberator 102, so, pressure improved in the inside of reverberator 102 and the inside of engagement member 103 respectively.For this reason, at the cooling air of the inside that flows in reverberator 102 and deliver between the cooling air of inside of engagement member 103 and do not suppress mutual such air contact of flowing basically.Therefore, can make air-breathing mobile independent to exhaust from each cooling air.

Like this, electrode sealing 101b, the 101c that temperature is lower in the luminotron 101 is by the cooling air cooling of the lower temperature of just having sent from fan 214.On the other hand, the air cooling of the 101a of spheroid portion that temperature is the highest in luminotron 101 after by cooling anodes sealing 101b.Like this, but the good cooling of implementation efficiency.

In addition, after the light-off, the heating when being disposed at the 101a of spheroid portion of reverberator 102 inside or the 101b of anode seal portion owing to bright lamp becomes high temperature, for this reason, is difficult to cool off at short notice.Yet, cooling air cools off the negative electrode sealing 101c that is configured in the space (B among Figure 10) outside such space (A among Figure 10), reverberator 102 inside (101a of spheroid portion that wherein has maximum temperature) by using independently, thereby comparable spheroid 101a of portion and the 101b of anode seal portion make the temperature of negative electrode sealing 101c descend earlier.Here, " independence " means the influence that is not subjected to other cooling object.

Fig. 6 is data of measuring the temperature of anode seal 101b of portion and negative electrode sealing 101c in the light supply apparatus 200 of present embodiment.

In Fig. 6, transverse axis is the time, and the longitudinal axis is a temperature.Can find out also that in this Fig. 6 the negative electrode sealed part side is cooled off with becoming lower temperature often.As a result, the mercury of inside that is sealing into the 101a of spheroid portion of luminotron 101 time is attached to the negative electrode that drops to the earliest below the boiling point often in liquefaction.For this reason, during the requisite glow discharge of bright lamp to next time, kation collides negative electrode, can prevent the mercury splash.Therefore, can do one's utmost to avoid to become the evaporation of tungsten of the occurrence cause of melanism, the result has successfully prolonged life-span of lamp.

Replenish the mercury attachment state of lamp here.As everybody knows, the boiling temperature of mercury liquefaction changes with air pressure.The discharge lamp that present embodiment uses also becomes high temperature owing to the 101a of spheroid portion of luminotron 101, so, can infer that air pressure increases.But between the temperature decrement phase when turning off the light, actual air pressure does not know that boiling temperature can not derive.The characteristic of this mercury before in addition, mercury stably adheres to is unclear.For this reason, in the present embodiment, adopted to make the negative electrode that should adhere to mercury be the formation of low temperature often.

(embodiment 5)

The signal that Figure 13 illustrates the light supply apparatus 210 of the embodiment of the invention 5 constitutes.In embodiment 4, the opening 103a of engagement member 103 becomes relatively from the direction of the air supply direction orthogonal of fan 214.Yet, as shown in Figure 13, though opening 103a and 103b towards with from the identical direction of the air supply direction of fan 214, also can obtain same effect.In this occasion, cooling air and the opening 103a from engagement member 103 that is sent to the inside of reverberator 102 from the opening 202a of lamp retainer 202 is sent to cooling air in the engagement member 103 and forms respectively independently and flow.

For this reason, similarly to Example 4, electrode sealing 101b, 101c are by the cooling air cooling of the lower temperature of just having sent from fan 214.On the other hand, the cooling air cooling of the 101a of spheroid portion that temperature is the highest in luminotron 101 after by cooling anodes sealing 101b.Like this, but the good cooling of implementation efficiency.In addition, the effect after the light-off also similarly to Example 4.

In addition, in the present embodiment, because it is narrower to be located at the opening 103a of engagement member 103, so, for air quantity and the blast that increases air-supply, be provided with the air guiding wall (not shown) that wind is guided to opening 103a, thereby can further improve cooling effect.

(embodiment 6)

The signal that Figure 14 illustrates the light supply apparatus 220 of the embodiment of the invention 6 constitutes.In embodiment 4 and embodiment 5, the opening 103a that is located at engagement member 103 and the direction of 103b have been described, but they all are the formation of cutting apart cooling air from 1 fan 214.

Yet, in the present embodiment, also can be respectively produce from the opening 202a of lamp retainer 202 and be sent to the cooling air of reverberator 102 inside and be sent to cooling air in the engagement member 103 from the opening 103a of engagement member 103 by fan 214,214a.

In Figure 14, establishing from opening 202a is Sirocco fan 214a with the fan 214 that cooling air is sent in the reverberator 102, from opening 103a the fans 214 that cooling air is sent in the engagement member 103 is aerofoil fan by air guiding wall 202b.

But in the present invention, the kind and the combination of fan are not limited thereto, also can according to the relation in the space of periphery etc., change the kind and the combination of fan.

In the present embodiment, electrode sealing 101b, 101c are by the cooling air cooling of the lower temperature of just having sent from fan 214a, 214.On the other hand, the cooling air cooling of the 101a of spheroid portion that temperature is the highest in the luminotron 101 after by cooling anodes sealing 101b.Like this, but the good cooling of implementation efficiency.In addition, the effect after the light-off is also same with embodiment 4,5.

Because it is narrow to be located at the opening (with reference to the 103a of Figure 11) of engagement member 103, so, in order to increase air quantity and blast, be provided with the air guiding wall 202b that wind is guided to this opening, like this, can further improve cooling effect.

In addition, in the various embodiments described above, image projection device has been described, but the present invention is also applicable to the light supply apparatus of the optical devices beyond the image projection devices such as exposure device, duplicating machine.

Claims (10)

1. a light supply apparatus is characterized in that: have

Luminophor,

Reflection makes the reverberator of its outgoing from the light of this luminophor, and

The wind-guiding member, this wind-guiding member is the member that is configured in the light exit side of above-mentioned reverberator, inflow entrance and flow export with cooling air, and have this cooling air towards the side directed wall portion of the above-mentioned luminophor in the above-mentioned reverberator in the position relative with above-mentioned inflow entrance

Above-mentioned inflow entrance and above-mentioned wall portion are positioned at opposition side across the emergent light axis of above-mentioned reverberator, extend along the direction that is parallel to this emergent light axis,

Above-mentioned flow export is arranged on the face that is provided with above-mentioned wall portion at least in the above-mentioned wind-guiding member.

2. light supply apparatus according to claim 1 is characterized in that: above-mentioned wall portion has curve form.

3. light supply apparatus according to claim 1 is characterized in that: compare with the above-mentioned flow export on being arranged on the face that is provided with above-mentioned wall portion, other flow export is located at except that the face that is provided with above-mentioned inflow entrance and is provided with on the face the face of above-mentioned wall portion.

4. light supply apparatus according to claim 3 is characterized in that: the area of above-mentioned flow export is bigger than the area of above-mentioned inflow entrance.

5. light supply apparatus according to claim 1 is characterized in that: the cover member that above-mentioned wind-guiding member maintenance has light transmission.

6. light supply apparatus according to claim 1 is characterized in that: above-mentioned wind-guiding member is integrally formed on the retaining member that keeps the lamp assembly, and this lamp assembly comprises above-mentioned luminophor and reverberator.

7. light supply apparatus according to claim 1 is characterized in that: have the fan that above-mentioned cooling air is flowed from above-mentioned inflow entrance.

8. optical devices is characterized in that: have

In the claim 1～7 any one described light supply apparatus and

Projection is from the projection optics system of the light of this light supply apparatus.

9. an image projection device is characterized in that: have

Any one described light supply apparatus in the claim 1～7,

To the image formation component of modulating from the light of this light supply apparatus, and

Projection is from the projection optics system of the light of this image formation component.

10. an image display system is characterized in that: have

The described image projection device of claim 9 and

Image information is supplied to the image information feedway of this image projection device.

Images