CN1705910A - Lighting system, and projector - Google Patents

Abstract

A projector (1) for enlargedly projecting an optical image formed by an optical device (44), comprising a light source device (411), the optical device (44) forming the optical image by modulating a luminous flux emitted from the light source device (411) according to image information, and an outer case (2) storing the light source device (411) and the optical device (44). The projector further comprising leg parts (26, 27) installed so as to be extended to and retracted from the outer peripheral surface of the outer case (2) to adjust the projection position of the enlargedly projected optical image, a suction air opening part (30) formed in the surface of the outer case (2) at which the leg parts (26, 27) are installed, and a suction fan (63) installed near the suction air opening part (30) inside the outer case (2) and leading cooling air from the outside of the outer case (2), wherein the suction surface (63A) of the suction fan (63) is disposed aslant relative to the surface of the outer case (2) in which the suction air opening part (30) is formed.

Description

Lighting device, projector

Technical field

The light beam that the present invention relates to possess light source, penetrates from this light source according to image information modulation form optical image optic modulating device, take in the casing of above-mentioned light source and above-mentioned optic modulating device, enlarge the projector of the optical image that projection forms by above-mentioned optic modulating device.

Background technology

In the past people just utilize according to the image information modulation and enlarge the projector of projection from the light beam of light source ejaculation, and in the last few years, such projector was demonstrated in the personal computer of enterprise, are used in the various uses such as perhaps see a film within the family.

Such projector possesses the optical devices, light source, the power circuit to their supply capabilities, the lamp drive circuit that are used for forming optical image, and they are accommodated in the casing.

Here, light source, power circuit and lamp drive circuit are at work at the pyrotoxin of box house heating, contain the member that To Be Protected from Heat and constitute in the optics, optic modulating device of optical devices.For this reason, in projector, just be provided with from the outside cooling system that imports each parts of cooling air, cooling box house of casing.

Just as open 2000-330202 communique (Fig. 5 the spy, Fig. 8) open in the 2000-10191 communique (Fig. 1) illustrated such with the spy, cooling system can be categorized as the cooling system of the optical system that comprises optical devices, the light source cooling system, power supply and light source driving circuit cooling system, in the past, what adopt is air after power supply and light source driving circuit cooling system are supplied with the cooling system that has passed through optical system, cool off these circuit, finally discharge such formation (for example, referring to patent documentation 1 to the outside near the extraction fan that is configured in the light source, patent documentation 2).

Summary of the invention

But, if use the formation of so existing cooling system, owing to be to be used as the cooling air that circuit is used optical system having been carried out cooled air, so can not cool off power circuit and light source driving circuit etc. with high-level efficiency, therefore expect to have the method that more effectively to cool off power circuit and light source driving circuit.

On the other hand, though also can consider to be provided with independently the way of the stream that cools off these circuit,, want to cool off effectively box house, just must form cooling flowing path from casing front to the back side, on the casing front drawing fan is set, one side is provided with extraction fan at the device back side.Therefore, the drawing fan that this circuit cools is used will interfere with each other with the fan that will be provided with in the cooling flowing path of other component parts, and can not promote the miniaturization of projector.

The object of the present invention is to provide to possess the component parts that can cool off effectively in the casing that comprises above-mentioned power circuit, light source driving circuit etc., and can promote the projector of miniaturization.

Projector of the present invention possesses: light source, the light beam that penetrates from above-mentioned light source according to image information modulation form the optic modulating device of optical image and take in the casing of above-mentioned light source and above-mentioned optic modulating device, and enlarge projection by the optical image that above-mentioned optic modulating device forms, it is characterized in that: possess: being set to can be flexible from the outer peripheral face of above-mentioned casing, the foot of the projected position of the optical image of the extended projection of adjustment; The air-breathing peristome that on the face of the above-mentioned casing that above-mentioned foot is set, forms; And be arranged near the above-mentioned air-breathing peristome of above-mentioned box house, from the outside drawing fan that imports cooling air of above-mentioned casing, wherein, the suction face of above-mentioned drawing fan disposes with respect to the face tilt ground of the above-mentioned casing that is formed with above-mentioned air-breathing peristome.

Here, as drawing fan, though can adopt various fans such as aerofoil fan or Sirocco fan, it is desirable to drawing fan be configured to that the suction face of drawing fan and air-breathing peristome dispose in opposite directions towards.

If employing the present invention, owing to be to form air-breathing peristome on the face of the casing that is provided with foot and the formation of gas outside directly importing by means of drawing fan here, so each fan can suck air respectively and carry sufficient cooling air to the cooling object, and can not relate to draining off by other cooling air that other fan sucked in the casing, and, generation can also be prevented, and noise can be prevented by the turbulent flow that influence produced of each fan.In addition since on the face of the casing that is provided with foot configuration air-breathing peristome and dispose drawing fan in its vicinity, so be easy to realize miniaturization on the plan view of projector.

In addition, because the suction face of drawing fan is with respect to the face tilt ground configuration of the casing that is formed with air-breathing peristome, even if projector arrangement is made on platform etc. is set air-breathing peristome and the face that platform is set near the time, also can leave the suction face of predetermined distance ground configuration drawing fan with the face that platform is set, near the suction face 63A of drawing fan 63, guarantee the space, so drawing fan can import sufficient cooling air to box house reliably, and, near the turbulent flow drawing fan 63 can be prevented and noise can be prevented.That is, even if under the suction face of drawing fan and the close state of the face that platform is set, the rotation that also can prevent to be accompanied by drawing fan is blocked airflow by casing and is made soakage reduce and prevent to produce fricative.

In addition, because by face tilt configuration drawing fan with respect to casing, and make drawing fan and the air-breathing peristome that on casing, forms leave a distance ground configuration, and just be difficult to spill so be accompanied by the noise of the rotation of drawing fan to the casing outside, will improve the quietness of projector.

In the present invention, it is desirable to possess at above-mentioned projector and be used for driving under the situation of light source driving circuit of usefulness to the power circuit of above-mentioned light source and above-mentioned optic modulating device supply capability and above-mentioned light source, above-mentioned drawing fan can be used to cool off in the cooling flowing path of above-mentioned power circuit and light source driving circuit.

If employing the present invention, because can be directly from outside power circuit, the light source driving circuit that imports the cooling air cooling as pyrotoxin of casing, so can cool off these circuit effectively.

In the present invention, it is desirable to be set with independently the cooling flowing path of the cooling air that imports by above-mentioned drawing fan with other cooling flowing path.

If employing the present invention, owing to make the cooling system of power circuit and light source driving circuit and other cooling system independent, so can more effectively cool off these circuit, can also improve the cooling effectiveness of other cooling system and the heat that taken place impact can not for other cooling system in these circuit.

In the present invention, it is desirable to above-mentioned cooling flowing path is constituted as and makes above-mentioned cooling air along the circulation of the inner face of the above-mentioned casing that is formed with above-mentioned air-breathing peristome.

If employing the present invention then can make the cooling flowing path of power circuit, light source driving circuit and other cooling flowing path independent reliably.

In the present invention, the cooling flowing path that it is desirable to said power circuit in top and light source driving circuit is divided from the upright tabular body that is provided with of casing inner face.

Here, it is desirable to tabular body and on the casing inner face, be provided with integratedly with this casing, under the situation of resinous casing, for example, can be by means of settings integratedly such as injection molding formings.

If employing the present invention can be fully independent with other cooling flowing path owing to tabular body cooling flowing path being divided into the district, so can more effectively cool off power circuit, light source driving circuit.

In the present invention, it is desirable under situation about with the wind guiding member of tubular power circuit and light source driving circuit being fenced up respectively, in wind guiding member separately, supply with cooling air from drawing fan.

Here, though wind guiding member can adopt the various tectosomes that can fence up these circuit substrates,, it is desirable to constitute wind guiding member with metal, improving thermal diffusivity, but also can give wind guiding member the electro-magnetic screen function of circuit substrate.

In addition, lead toward the import volume of the cooling air of each wind guiding member, the shape of the peristome of the shape of the angle of inclination of the openend of the wind guiding member of the relative tubular of deflation area that can be by adjusting drawing fan and/or the peristome of the air-breathing side of each wind guiding member and/or the exhaust side of each wind guiding member makes it to change.

If employing the present invention, because can be by febrile state according to power circuit, light source driving circuit, adjust the shape of peristome of the angle of inclination of deflation area of drawing fan and/or each wind guiding member suction side and/or each wind guiding member exhaust side peristome shape and import cooling air to each wind guiding member pari passu, so can further improve the cooling effectiveness of these circuit substrates.

In addition, owing to constitute wind guiding member with metal, thus can improve thermal diffusivity, can also make it to have the function of electromagnetic screen, so no longer need power circuit, light source driving circuit are taked the EMI countermeasure in addition, can simplify the internal structure of projector.

In the present invention, it is desirable to above-mentioned drawing fan is installed on the above-mentioned wind guiding member.

If employing the present invention, because when the suction face of drawing fan is disposed with respect to the face tilt of casing, the supporting member of drawing fan need be set in addition on the casing inner face, so the internal structure of projector is further simplified, be desirable aspect the miniaturization of seeking device.

In the present invention, it is desirable to, above-mentioned air-breathing peristome is the 1st air-breathing peristome, above-mentioned drawing fan is the 1st drawing fan, on the side of above-mentioned casing, possesses the air that makes above-mentioned box house to the outside exhaust port portion that discharges of above-mentioned casing, wherein, possess: the 2nd air-breathing peristome of on above-mentioned casing, turning up the soil and being provided with the above-mentioned the 1st air-breathing opening portion; Be arranged on above-mentioned the 2nd air-breathing peristome neighbouring, from outside the 2nd drawing fan that imports cooling air of above-mentioned casing; By importing above-mentioned casing air outside from the above-mentioned the 2nd air-breathing peristome to above-mentioned box house by above-mentioned the 2nd drawing fan, make it to flow to above-mentioned exhaust port portion and to flow to the outside mode of discharging of above-mentioned casing, cool off the 1st cooling system of above-mentioned optic modulating device and above-mentioned light source from above-mentioned exhaust port portion; With by importing above-mentioned casing air outside from the above-mentioned the 1st air-breathing peristome to above-mentioned box house by above-mentioned the 1st drawing fan, make it to flow to above-mentioned exhaust port portion and to flow to the outside mode of discharging of above-mentioned casing, cool off the 2nd cooling system of above-mentioned power circuit and above-mentioned light source driving circuit from above-mentioned exhaust port portion.

If employing the present invention, because by independently the 1st cooling air stream and the 2nd cooling air stream that have cooled off effectively behind each pyrotoxin of projector inside of airflow can be from shared exhaust port portion discharge respectively, so can simplify the shaping of casing, and, the discharge direction that is easy to manage air.

In the present invention, it is desirable to above-mentioned the 1st cooling air stream and above-mentioned the 2nd cooling air stream in above-mentioned exhaust port portion from separately zone discharge.

If employing the present invention, owing to can carry out the discharge of the 1st cooling air stream and the 2nd cooling air stream from the zones of different in the exhaust port portion, even if, can cool off the inside of projector effectively so when discharging the 1st cooling air stream and the 2nd cooling air stream, also can discharge uninterruptedly.

In the present invention, it is desirable in the 1st wind guiding member that above-mentioned power circuit is configured in tubular; Above-mentioned light source driving circuit is configured in the 2nd wind guiding member of tubular; The part of above-mentioned the 2nd cooling air stream is imported in above-mentioned the 1st wind guiding member, and another part of above-mentioned the 2nd cooling air stream is imported in above-mentioned the 2nd wind guiding member; Airflow that comes from the circulation of above-mentioned the 1st wind guiding member and the airflow that comes from above-mentioned the 2nd wind guiding member circulation are discharged from zone separately in above-mentioned exhaust port portion.

If employing the present invention, owing to can use respectively independently cooling air stream cooling power circuit and light source driving circuit, in addition, can also carry out each has been carried out the discharge of cooled air from the different zone in the exhaust port portion, so can more effectively cool off power circuit and light source driving circuit and each airflow can not interfered.

In the present invention, the suction face that it is desirable to above-mentioned the 1st drawing fan be configured to obliquely along with to above-mentioned exhaust port portion near and away from the above-mentioned the 1st air-breathing peristome.

If employing the present invention, owing to the suction face of the 1st drawing fan is configured in because of other thermal source portion of projector inside having been carried out on the opposite direction of airflow that cooling heats up, so can prevent the air after the 1st drawing fan sucks the intensification of projector inside, can suck the low air of temperature of projector outside more.

Description of drawings

Fig. 1 shows the perspective schematic view that the outward appearance of the projector of example of the present invention constitutes;

Fig. 2 shows the perspective schematic view that the outward appearance of the projector of above-mentioned example constitutes;

Fig. 3 shows the perspective schematic view that the inside of the projector of above-mentioned example constitutes;

Fig. 4 shows the perspective schematic view that the inside of the projector of above-mentioned example constitutes;

Fig. 5 shows the mode chart of structure of optical system of the projector of above-mentioned example;

Fig. 6 shows the perspective schematic view of configuration of the power circuit of above-mentioned example;

Fig. 7 shows the perspective schematic view of configuration of the light source driving circuit of above-mentioned example;

Fig. 8 shows the skeleton view of structure of the power circuit of above-mentioned example;

Fig. 9 shows the side view of structure of the power circuit of above-mentioned example;

Figure 10 shows the sectional view of the arrangement of the power circuit of above-mentioned example and light source driving circuit;

Figure 11 is the perspective schematic view of cooling system that the projector of above-mentioned example is shown;

Figure 12 is the perspective schematic view of configuration that the light source driving circuit of above-mentioned example is shown.

Embodiment

Below, with reference to the accompanying drawings an example of the present invention is described.

(1) outward appearance constitutes

Fig. 1 and Fig. 2 show the projector 1 of example of the present invention, and Fig. 1 is the skeleton view of seeing from front, top one side, and Fig. 2 is the skeleton view of seeing from the back side, below one side.

This projector 1 is the light beam that penetrates from light source according to image information modulation, enlarge the optical device on the projecting plane that projects to screen etc., possesses a device body that comprises optical devices described later is accommodated in inner outer installation shell 2 and the projecting lens 3 that exposes from outer installation shell 2.

Projecting lens 3, possess described later, as enlarging light beam that projection penetrates from light source according to the image information modulation by means of optic modulating device and, can be used as the compound lens formation that a plurality of lens is accommodated in lens barrel inside by means of the function of the projection optical system of the formed optical image of light beam after the synthetic modulation of light compositing device.

Outer installation shell 2 as casing, form to make the size wide rectangular shape bigger of the Width vertical with projecting direction than projecting direction size, possesses the front casing 23 that the previous section of lower casing 2 that the bottom of upper housing 21 that the handle assembly upper part of body covers, handle assembly body covers and handle assembly body covers.These each casings 21～23rd are by means of the plastic integrally formed product of shapings such as injection molding forming.

Upper housing 21 possesses: the last facial 21A that the handle assembly upper part of body covers, the 21D of back side portion that hang down the side surface part 21B, the 21C that come substantially and hang down substantially and from the rearward end of last facial 21A in the Width end of facial 21A on this.

On the projecting direction front side of the 21A of portion, be provided with the starting that is used for carrying out projector 1, the guidance panel 24 of adjusting operation in the above.This guidance panel 24 possesses a plurality of switches of the adjustment switch that comprises starting switch, image one sound etc., when projector 1 carries out projection, by adjustment switch in the guidance panel 24 etc. is operated, just can carry out the adjustment of image quality, volume etc.

In addition, the vicinity of the guidance panel 24 of the 21A of portion is formed with a plurality of holes 241 in the above, and the loudspeaker (not shown) that voice output is used is taken in by portion within it.

These guidance panel 24 and loudspeakers are electrically connected with the control basal plate of constituent apparatus body described later.Handle by this control basal plate from the operation signal that guidance panel 24 obtains.

On the part 21D,, in this recess, expose the connector group 25 that on the interface board that is connected to control basal plate described later, is provided with overleaf being formed with the recess of the 21A of portion one side otch in the above on the middle body substantially.

Lower casing 2, with and upper housing 21 between the composition surface be that the center constitutes substantially symmetry, possess bottom surface sections 22A, side surface part 22B, 22C and the 22D of back side portion.In addition, side surface part 22B, 22C and the 22D of back side portion, part engages with side surface part 21B, the 21C of upper housing 21 and the end portion of the 21D of back side portion in the top, constitutes the lateral parts and the back portion of outer installation shell 2.

On bottom surface sections 22A, be provided with fixed foot portion 26 at the rear end of projector 1 side cardinal principle central part, front end one side Width two ends are provided with and adjust foot 27 simultaneously.

This adjusts foot 27, and by constituting to the shaft like parts that face foreign side upwards flexible (advance and retreat) freely highlights from bottom surface sections 22A, shaft like parts self is incorporated in the inside of outer installation shell 2.Can adjust such adjustment foot 27 flexible (advance and retreat) amount by the adjustment button 271 of operation setting on the lateral parts of projector 1 from bottom surface sections 22A.

So, feasible can the adjustment from the upper-lower position of the projected image of projector 1 ejaculation, the formation projected image can be in the proper place.

In addition, on bottom surface sections 22A, also be formed with peristome 28,29 and 30 with the internal communication of outer installation shell 2.

Peristome 28 is the parts of loading and unloading the light supply apparatus 411 of the light source that comprises projector 1, gets up with lampshade 281 obturations usually.

Peristome 29,30 is constituted as the peristome of slit-shaped.

Peristome 29 is to be used for cooling off comprising that conduct is according to the cooling air inhalant air-breathing peristome of image information modulation from the optical devices 44 of the liquid crystal panel of the optic modulating device of the light beam of illuminator ejaculation.

Peristome 30 is to be used for sucking the air-breathing peristome of cooling air of supply unit that constitutes the device body of projector 1 in order to cooling.

In addition, because peristome 29,30 gets up with the internal communication of projector 1 in its slit-shaped openings part, so side is respectively arranged with membrane filter and enters into inside not make dust etc. within it.

In addition, on bottom surface sections 22A, also be provided with the cover 31 that relative bottom surface sections 22A can be installed in the outside with being free to slide, and constitute and to be accommodated in inside being used for the telepilot of remote-controlled operation projector 1 at this cover 31.In addition, in unshowned telepilot, be provided with said guidance panel 24 on top on be provided with starting switch, adjust same switch such as switch, when remote controller, will be from the telepilot output infrared signal corresponding with this operation, infrared signal can be handled by control basal plate by being arranged on the light accepting part 311 on the outer installation shell front and the back side.

Overleaf on the 22D of portion, with same under the situation of upper housing 21, form bottom surface sections 22A one side by the recess of otch at central part substantially, the connector group 25 that is arranged on the above-mentioned interface board is exposed, simultaneously, also be formed with peristome 32 near the end, input connector 33 exposes from this peristome 32.Input connector 33 is from the terminal of external power source to projector 1 supply capability, be electrically connected with power supply unit described later.

Constituting of front casing 23 possesses front face 23A and goes up facial 23B and lower face 23C, projecting direction rear end one side of the 23B of portion engages with the projecting direction fore-end of the said upper housing 21 in top in the above, and projecting direction rear end one side of the 23C of portion engages with the projecting direction fore-end of the said lower casing 22 in top below.

On the front face 23A, be formed with and be used for making round-shaped substantially peristome 34 that projecting lens 3 exposes and at its contiguous peristome 35 that constitutes by a plurality of slits that forms.

A top side of peristome 34 also is formed opening, and the part of the lens barrel of projecting lens 3 is exposed, and makes to be arranged on knob (handle) 3A, the 3B that usefulness is adjusted in lens barrel zoom-focusing on every side from peripheral operation.

Peristome 35 constitutes cooled air is carried out in discharge to device body exhaust port portion, from the projecting direction of this peristome 35 to projector 1, optical system, control system and the supply unit of discharging the component parts as projector 1 described later carry out cooled air.

(2) inner formation

As Fig. 3～shown in Figure 5, the device body of projector 1 is accommodated in the inside of so outer installation shell 2, and constituting of this device body possesses optical unit shown in Figure 34, control basal plate 5 and supply unit 6 shown in Figure 4.

(2-1) structure of optical unit 4

Optical unit 4, be to form optical image, form the unit of projected image by projecting lens 3 at screen according to the light beam that image information adjustment system penetrates from light supply apparatus 411, it constitutes light supply apparatus 411 or various opticses etc. is assembled in the such used for optical part casing of optical waveguide shown in Figure 4 40.

This optical waveguide 40 by following optical waveguide 401 and in Fig. 4, omitted illustrated on optical waveguide constitute, each all is the synthetical resin products that forms with injection molding forming etc.

Following optical waveguide 401 is formed the top that is made of bottom surface sections 401A that takes in optics and side wall portion 401B and forms the container-like of opening, and side wall portion 401B is provided with a plurality of ditch 401C of portion.The various opticses that constitute optical unit 4 are assembled in the 401C of this ditch portion, by means of this, just can precision well each optics be configured on the lighting optical axis that is arranged in the optical waveguide 40.Last optical waveguide has the flat shape corresponding with this time optical waveguide 401, constitutes the lid shape parts that the upper cover of optical waveguide 401 is down got up.

In addition, the light beam of the bottom surface sections 401A of following optical waveguide 401A penetrates a side end and is provided with the front side wall that has formed round-shaped peristome, on this front side wall, fixedly installs the cardinal extremity part of projecting lens 3.

In such optical waveguide 40, as shown in Figure 5, can be integration lamp optical system 41, color separation optical system 42, relay optical system 43 from rough segmentation on the function, make optical modulation optics system and look combining optical integrated optical devices 44.In addition, this routine optical unit 4 is the unit that adopt in 3 board-like projector, constitutes in optical waveguide 40 optical unit of space look divergence type that the beam separation that penetrates from integration lamp optical system 41 is become the coloured light of 3 looks.

Integration lamp optical system 41, be to make the light beam that penetrates from light source become optical system for the light beam of the illumination homogeneous in the lighting optical axis vertical plane, it constitutes possesses light supply apparatus the 411, the 1st lens arra the 412, the 2nd lens arra 413, polarization conversion device 414 and overlapping lens 415.

Light supply apparatus 411 possesses illuminator 416 and reverberator 417 as the radiation light source, with reverberator 417 reflection from the radial light of illuminator 416 ejaculations become for parallel rays substantially to penetrate to the outside.In this example, though what adopt as illuminator 416 is high-pressure mercury-vapor lamp, in addition also can adopt metal halide lamp or Halogen lamp LED.In addition, in this example,, also can adopt the parallelization concavees lens are configured in constituting on the outgoing plane of the reverberator that is made of off-axis paraboloids and ellipsoids mirrors though what use as reverberator 417 is paraboloidal mirror.

The 1st lens arra 412 possesses and has the formation that the lenslet of the profile of rectangular shape is substantially lined up seeing from the lighting optical axis direction rectangularly.Each lenslet is divided into segment beam to the light beam that penetrates from illuminator 416, penetrates to the lighting optical axis direction.The contour shape of each lenslet is set to shape with the image forming area of liquid crystal panel 441 described later and forms substantially similar figures.For example, if the horizontal vertical of the image forming area of liquid crystal panel 441 is 4: 3 than (ratio of horizontal with vertical size), then the horizontal vertical ratio of each lenslet also will be set at 4: 3.

The formation of the 2nd lens arra 413 is identical substantially with the 1st lens arra 412, possesses the formation that lenslet is lined up rectangularly.The 2nd lens arra 413 with overlapping lens 415, has the function of picture imaging on liquid crystal panel 441 of each lenslet that makes the 1st lens arra 412.

Polarization conversion device 414 is transformed into a kind of polarized light to the light from the 2nd lens arra 413, by means of this, has improved the utilization factor of the light in optical devices 44.

Specifically, be transformed into a kind of various piece light beam behind the polarized light, finally overlapped onto substantially by means of overlapping lens 415 on the liquid crystal panel 441 of optical devices 44 by means of polarization conversion device 414.In the projector of the liquid crystal panel 441 of the type of using modulated polarized light owing to can only utilize a kind of polarized light, so from the light beam of the illuminator 416 that sends polarized light at random half just can not utilize substantially.For this reason,, the light beam that penetrates from illuminator 416 all is transformed into a kind of polarized light, has improved the utilization ratio of the light in the optical devices 44 by using polarization conversion device 414.In addition, such polarization conversion device 414 is for example opened in the flat 8-304739 communique the spy and is introduced.

Color separation optical system 42 possesses 2 dichronic mirrors 421,422 and catoptron 423, has the function that a plurality of segment beams that penetrate from integration lamp optical system 41 is separated into the coloured light of red (R), green (G), blue (B) this 3 look by means of dichronic mirror 421,422.

Relay optical system 43 possesses light incident side lens 431, relay lens 433, catoptron 432,434, has the function that the red light as the coloured light that separates with color separation optical system 42 is directed to liquid crystal panel 441R.

At this moment, in the dichronic mirror 421 of color separation optical system 42, among the light beam of integration lamp optical system 41 ejaculations, see through red light composition and green light composition, the reflection blue light component.Blue light by after dichronic mirror 421 reflections in the reflection of catoptron 423 places, behind field lens 418, arrives the liquid crystal panel 441B of blue usefulness.This field lens 418 becomes the parallel light beam of its central shaft (chief ray) relatively to the various piece optical beam transformation that penetrates from the 2nd lens arra 413.The field lens 418 that is arranged on the light incident side of other liquid crystal panel 441G, 441R also is same.

In addition, among the red light and green light after having seen through dichronic mirror 421, green light is reflected by dichronic mirror 422, passed through field lens 418 after, arrive the liquid crystal panel 441G of green usefulness.On the other hand, red light by behind the field lens 418, arrives the liquid crystal panel 441R that red light is used again seeing through dichronic mirror 422 backs by relay optical system 43.In addition, why will use relay optical system 43 to red light, be because the length of the light path of red light is longer than the optical path length of other coloured light, prevent the cause of the utilization ratio reduction of the light that caused by dispersing of light etc.That is be, because the segment beam that incides on the light incident side lens 431 is maintained the original state cause that ground field lens 418 propagates.In addition,, relay optical system 43 makes the formation that red light is passed through among 3 coloured light though becoming,, be not limited to this, for example, also can become the formation that blue light is passed through.

Optical devices 44 are modulated into the light beam that shines according to image information and are formed coloured image, possess: 3 light incident side polaroids 442 of each the coloured light institute incident that separates by color separation optical system 42, be configured in liquid crystal panel 441R, 441G, the 441B as optic modulating device of the back level of each light incident side polaroid 442, with the emitting side polaroid 443 of the back level that is configured in each liquid crystal panel 441R, 441G, 441B, and as the cross colour splitting prism 444 of look combining optical.

Liquid crystal panel 441R, 441G, 441B for example are used as on-off element to multi-crystal TFT, omitted though illustrate, and, it constitutes the panel body that will be sealing into sealing liquid crystal in a pair of transparency carrier that disposes in opposite directions and is accommodated in the maintenance frame.

In optical devices 44,,, modulate the formation optical image according to image information by means of these 3 liquid crystal panel 441R, 441G, 441B, light incident side polaroid 442 and emitting side polaroid 443 by each coloured light that color separation optical system 42 separates.

Among each coloured light that is separated by color separation optical system 42, light incident side polaroid 442 only makes the polarized light of constant direction see through, and absorbs other light beam, forms by the substrate top that polarizing coating is pasted sapphire glass etc.In addition, also can paste polarizing coating on the field lens 418 and do not use substrate.

Emitting side polaroid 443 also similarly constitutes substantially with light incident side polaroid 442, among the light beam that penetrates from liquid crystal panel 441 (441R, 441G, 441B), the polarized light of prescribed direction is seen through, and absorb other light beam.In addition, also can paste polarizing coating on the cross colour splitting prism 444 and do not use substrate.

These light incident side polaroids 442 are set so that with emitting side polaroid 443 direction of polarization axle each other is vertical.

Cross colour splitting prism 444 is to penetrating from emitting side polaroid 443 and each coloured light all having been carried out the optical image after the modulation and synthesized and form coloured image.

In cross colour splitting prism 444, the dielectric multilayer film of reflection red light and the dielectric multilayer film of reflect blue light become X-shaped shape substantially along the layout setting of 4 right-angle prisms, by means of the synthetic 3 kinds of coloured light of these dielectric multilayer films.

Such optical devices 44, the panel fixed head that has the pin (contact pin) that direction is outstanding outside face by handle in 4 bights of rectangular plate shape body pastes on each light beam incident end face of cross colour splitting prism 444, and each pin of insertion just can be integrated in the hole that forms in the maintenance frame of liquid crystal panel 441R, 441G, 441B.

Then, the optical devices after integrated 44 are configured on the light path prime of projecting lens 3 of the said optical waveguide 40 in top, and screw (screw element) is fixed to down on the bottom surface sections of optical waveguide 401.

(2-2) structure of control basal plate 5

Control basal plate 5, as shown in Figure 3, be configured to the upside of optical unit 4 is covered, possess: arithmetic processing apparatus, liquid crystal panel are installed drive with the main substrate 51 of IC with in the rear end side of this main substrate 51 and couple together and the 21D of back side portion of the shell 2 of installing outside, the interface board 52 that stands up in the 22D place.

In the back side of interface board 52 side, be equipped with the said connector group 25 in top, from the image information of connector group 25 inputs, export to main substrate 51 by this interface board 52.

Arithmetic processing apparatus on the main substrate 51 after the image information of being imported is carried out calculation process, is exported steering order to the liquid crystal panel driving with IC.Drive and use IC, produce output drive signal to drive liquid crystal panel 441, so, just can carry out optical modulation and form optical image according to image information according to this steering order.

Such main substrate 51 is covered by the sheet metal 53 that punch metal is carried out bending machining formation, and this sheet metal 53 is to be provided with by the EMI (electromagnetic interference (EMI)) of generations such as the circuit component on the main substrate 51 in order to prevent.

(2-3) structure of supply unit 6

Supply unit 6 possesses: have the power supply unit 61 of power circuit shown in Figure 6 and have Fig. 7 of the below that will be configured in this power supply unit 61 and the lamp driver element 62 of light source driving circuit shown in Figure 12.Figure 12 illustrates the lamp driver element 62 that is installed on the lower casing 22.Situation when the wind guide component 65 that Fig. 7 illustrates Figure 12 is through.

Power supply unit 61, the electric power of supplying with from the outside by the unshowned feed cable that is connected on the said input connector 33 in top to supplies such as above-mentioned lamp driver element 62 or control basal plate 5.

This power supply unit 61 as shown in Figure 8, constitutes the metal cylindrical body 612 that possesses this structure base board 611 and this this structure base board 611 is fenced up.

Cylindrical body 612 is shapes of the cardinal principle top box shape of hollow, possesses peristome 612h on the part of the end face 612f of a side among bottom surface side, and the opposing party's end face 612g is formed with opening.

The lower end of the two sides of the opposing party's end face 612g side of cylindrical body 612 is bent into horizontal direction towards the outside, on this horizontal component, form hole 612A, 612B, in addition, also bending laterally and form porose 612C of the lower end of the lateral parts of the middle body substantially of cylindrical body 612.In addition, cylindrical body 612 it is desirable to metal, by means of this, except the function as the wind guide component of the cooling air that flows, can also prevent EMI equally with the sheet metal 53 of control basal plate 5.

The lateral parts of one side's of cylindrical body 612 end face 612f side extends downwards, is in the peristome 612h between this extension, and drawing fan 63 is installed.

This drawing fan 63 as shown in Figure 9, is installed as along with before a side end face 612f and then near the end face 612e of this structure base board 611 and cylindrical body 612 with being tilted, and the part of the deflation area 63B of drawing fan 63 faces the inside of cylindrical body 612.

Lamp driver element 62, be to be used for the translation circuit of stable voltage to said light supply apparatus 411 supply capabilities in top, industrial alternating current from power supply unit 61 inputs, after being carried out rectification and conversion by this lamp driver element 62, becoming is by for toward light supply apparatus 411 behind DC current or the AC square wave current.

This lamp driver element 62, as Fig. 7 and shown in Figure 10, its constitute possess substrate 621, the various circuit components 622 on the upper part of substrate 621, wind guide component 65 that cooling air is flowed to substrate 621 and circuit component 622.In addition, lamp driver element 62 also be configured to a part intersect with the said power supply unit 61 in top.

Wind guide component 65, on part adjacent among the side, form with the peristome 65a that imports cooling air with peristome 30, in addition, with the side on the opposite, side that forms peristome 65a on peristome 65a near the diagonal angle, bight the bight near be formed with peristome 65b.

Such power supply unit 61 and lamp driver element 62 as Fig. 6, Figure 10 and shown in Figure 12, are fixed on the lower casing 22.

At first, lamp driver element 62 is being fixed on the bottom surface sections 22A of lower casing 22 by means of resin rivet 62a under the state that is fenced up by wind guide component 65.In addition, lamp driver element 62 also can become by means of screw (screw element) rather than rivet 62a and is fixed to formation on the bottom surface sections 22A.

In addition, lamp driver element 62, also fenced up by the upright a plurality of tabular bodys 64 that are provided with on the bottom surface sections 22A of lower casing 22 inner face, simultaneously, a plurality of tabular bodys 64 are set to also the air-breathing peristome 30 that forms on bottom surface sections 22A be fenced up, near the space the peristome 30 and configured light driver element 62 the space by means of these a plurality of tabular bodys 64 in lower casing 22 and other space independent.

In addition, a plurality of tabular bodys 64 are to adopt the way that is shaped integratedly simultaneously when the injection molding forming of lower casing 22 to constitute.Secondly, power supply unit 61 is configured to see that the part with this lamp driver element 62 intersects on plan view on the top of lamp driver element 62, after making hole 612A～612C (referring to Fig. 8) position alignment that forms on the screw 64a (referring to Fig. 7) that forms on the top of tabular body 64 and the cylindrical body 612, be fixed to by means of screw 64b on the upper part of tabular body 64 (referring to Figure 10) at power supply unit 61.

At this moment, be arranged on the drawing fan 63 on the cylindrical body 612, be configured under the state that is fenced up by a plurality of tabular bodys 64, leave a distance a little with the peristome 30 that on bottom surface sections 22A, forms, then, again the suction face 63A of drawing fan 63 is configured to along with before the projecting direction of projector 1 and then near bottom surface sections 22A obliquely with respect to bottom surface sections 22A.

In this example, in cooling system A described later, owing to be to discharge cooled air in the front of projector 1 side, and become such tilted configuration, but, when will be under the situation of the back side of projector 1 a side exhaust, it is desirable to this inclination is become in the opposite direction.In a word, drawing fan 63 it is desirable to be configured so that obliquely suction face 63A along with near the discharge directions of the cooling air stream of projector 1 in other words along with near peristome 35 and near air-breathing peristome 33.So, suck because of other thermal source portion being cooled off the possibility of the air of projector 1 inside of heating up,, can further improve cooling effectiveness so drawing fan 63 can the low air of inlet temperature owing to can reduce drawing fan 63.

On the other hand, the deflation area 63B of drawing fan 63 as shown in figure 10, tilts and can blow to the peristome 12h of cylindrical body 612 and this two side of peristome 65a of wind guide component 65 for making.

Therefore, by means of the said structure in top, the peristome 30 that forms on casing 2 just can link up with a plurality of tabular bodys 64 to the suction face 63A of drawing fan 63, and the deflation area 63B of drawing fan 63 just can be respectively be attached on a side the peristome 65a of a side the peristome 612h of cylindrical body 612 and wind guide component 65 by means of cylindrical body 62 and a plurality of tabular body 64.Be configured in from front casing 23 these sides as the end face 612g of the opposing party's of cylindrical body 612 peristome and see on the corresponding position of the upper right part of the peristome 35 that forms with casing 2, the opposing party's of wind guide component 65 peristome 65b is configured in from front casing 23 these sides and sees on the corresponding position of the bottom left section of the peristome 35 that forms with casing 2, respectively the deflation area 63B of drawing fan 63 and peristome 35 are linked up, form the circulation flow path make the cooling air that cooling system B1 and B2 circulate independently.

In addition, by result of calculation or experimental result according to the thermal value of power supply unit 61 and lamp driver element 62, adjust angle of inclination and/or the peristome 612h of cylindrical body 612 and shape and/or the peristome 65a of wind guide component 65 and the shape of peristome 65b of peristome 612g of the deflation area 63B of drawing fan 63 accordingly with its febrile state, just can adjust air quantity separately.

(2-4) structure of exhaust unit

Exhaust unit 8 as shown in Figure 3, is configured on the lateral parts of light supply apparatus 411 along outer installation shell 2.

This exhaust unit 8 possesses: the gas exhaust duct 81 of tubular, be installed in the extraction fan 82 on light supply apparatus 411 these side ends of this gas exhaust duct 81 and be installed in inside window shutter 83 on front casing 23 these sides of gas exhaust duct 81.Exhaust unit 8 by means of the air-supply of extraction fan 82, by gas exhaust duct 81, is discharged by inner window shutter 83 near projector 1 inside of light supply apparatus 411 and control basal plate 5 being carried out cooled air.

Extraction fan 82 sucks and to carry out cooled air near the projector 1 to light supply apparatus 411 and control basal plate 5 and the cooling air that this sucks into is sent in the gas exhaust duct 81.

This extraction fan 82 to a side's of gas exhaust duct 81 peristome, make a side the peristome of extraction fan 82 and extraction fan 81 be close to, thereby cooling air just can not spill by screw retention from its coupling part.

Gas exhaust duct 81 is cross section cylindrical shape of rectangular shape substantially, possesses peristome on its two ends, and a side peristome is connected with the deflation area of extraction fan 82 among the openings at two ends portion, and the opposing party's peristome is linked on the inner window shutter 83.Connect the opposing party's the opening portion of the gas exhaust duct 81 of inner window shutter 83, be configured to see the upper left that faces peristome 35 from front casing 23 these sides.

The inside window shutter 83 that on the opposing party's of gas exhaust duct 81 peristome, is provided with, be to have the cooling air of discharging from gas exhaust duct 81 is carried out rectification, makes cooling air only to the rectification window shutter of the mobile rectification function of prescribed direction, be configured to parallel substantially each other at the upwardly extending a plurality of vane plates 831 of upper and lower.

These vane plates 831 are arranged in the horizontal direction side by side along the stream of cooling air, simultaneously the opposing party's of gas exhaust duct 81 peristome are separated on above-below direction.Such inside window shutter 83, see the upper left that is configured in peristome 35 from front casing 23 these sides, by means of each vane plate 831, discharge the cooling air of cooling system A described later to the direction of leaving from the projected image area of projector 1 from peristome 35.

Such exhaust unit 8 by screw retention to lower casing 22.That is, make and on plan view, see mode, exhaust unit 8 is configured in the top of lamp driver element 62, and is fixed on the bottom surface sections 22A of lower casing 22 to intersect with the part of lamp driver element 62.

By means of this, just can make air entry face light supply apparatus 411 as an end of exhaust unit 8, make the peristome 35 that faces front casing 23 as the exhausr port of the other end of exhaust unit 8.

(2-5) cooling construction

In the on top said projector 1, as shown in figure 11, be provided with the cooling system A of cooling optical devices 44 and the cooling system B of cooling supply unit 6.

Cooling system A is by means of the air-flow of suction unit 7 from the air-breathing cooling air of peristome 29 (referring to Fig. 2).

The constituting of suction unit 7 comprises that clipping a pair of Sirocco fan 71 that projecting lens 3 disposes in opposite directions and the suction face that makes this a pair of Sirocco fan 71 is communicated to pipeline (not shown) on the peristome 29.

By means of the suction unit 7 direct cooling airs that suck into from the outside of projector 1, by Sirocco fan 71, by below for past liquid crystal panel 441R, 441G, 441B, light beam incident end face along cross colour splitting prism 444 flows liquid coolant crystal panel 441R, 441G, 441B, emitting side polaroid 443 and light incident side polaroid 442 upward from the below.

To the cooling air of the top of optical devices 44 stream, touch main substrate 51 its airflow directions of back that constitute control basal plate 5 and change with the right angle bending, the various circuit components that are assemblied on the main substrate 51 are cooled off.

The cooling air of cooling behind the main substrate 51 is deflated fan 81 and collects and be sent to gas exhaust duct 82, discharges to the outside of projector 1 from the peristome 35 (referring to Fig. 1) of front casing 23.

Here, front from the projector 1 of Figure 11, be configured in the Sirocco fan 71 in projecting lens 3 left sides, though supply with cooling air to liquid crystal panel 441R, 441B, a part wherein but is used as the cooling air of polarization conversion device 414 and light supply apparatus 411.

In other words, the part of this cooling air flows in the gap that forms between below the bottom surface sections 22A of lower casing 22 and following optical waveguide 401, also wants branch to become 2 directions in its way.Cooling air behind one side's the branch, the slit pore that below the following optical waveguide 401 of the position corresponding, forms with polarization conversion device 414, after polarization conversion device 414 being cooled off, supplied to cool off toward 411 pairs of illuminators 416 of light supply apparatus toward optical waveguide 40 inside.Cooling air behind the opposing party's the branch is directly supplied toward light supply apparatus 411, cools light source lamp 416.

Then, cooled off the air behind the light supply apparatus 411, be deflated fan 81 and collect and be sent to gas exhaust duct 82 and discharge to the outside of projector 1 from the peristome 35 (referring to Fig. 1) of front casing 23.

On the other hand, cooling system B, be the air-flow of the cooling air of suck from peristome 30 (referring to Fig. 2) by means of the drawing fan 63 that is arranged on the power supply unit 61, comprise the cooling system B1 that cools off power supply unit 61 and the cooling system B2 of cool down lamp driver element 62.

Describe in more detail referring to Figure 10.At first, cooling system B1, be by means of drawing fan 63 from peristome 30 from projector an outside part that directly sucks the cooling air of coming in of 1 for inside toward the cylindrical body 612 of power supply unit 61, after having cooled off the circuit component that is assemblied on this structure base board 611, direct airflow of discharging to the outside from the peristome 35 (referring to Fig. 1) that forms at lower casing 23.

On the other hand, cooling system B2, an outside other part that directly sucks the cooling air of coming in of 1 flows to the below of cylindrical body 612 along tabular body 64 from peristome 30 from projector by means of drawing fan 63, supply toward the inside that is arranged on the wind guide component 65 on the lamp driver element 62, behind the circuit component that has cooled off on the substrate 621 that is assemblied in lamp driver element 62, discharge to the outside from the part of the bottom of the gas exhaust duct 82 of peristome 35.

As mentioned above, cooling system A and cooling system B directly suck outer gas and after pyrotoxin is cooled off at the drawing fan 71,63 that is arranged by means of separately branch, lower casing 23 these sides from projector 1, eject from the air that cools off the gas exhaust duct 82 of the A of system from the upper left of peristome 35, eject from the air that cools off the ventilation component 65 of the B2 of system from the bottom left section of peristome 35, the air from the cylindrical body 612 of cooling system B1 is carried out exhaust from the lower right-most portion of peristome 35.Therefore, though cooling system A and B discharge cooled air from peristome 35, but to discharge from the different zone of peristome 35 respectively.

(3) effect of example

If adopt as described above example, then have following effect.

(3-1) since be a kind of by means of drawing fan 63 from being provided with fixed foot portion 26 and adjusting air-breathing peristome 30 that the bottom surface sections 22A of the outer installation shell 2 of foot 27 forms outer gas (extraneous gas) is used as the directly importing formation of coming in of cooling air, owing to sucked the cooling air of coming in by the drawing fan among this cooling system B 63, with by other fan in the shell 2 of installing outward for example along the extraction fan 81 of front casing 23 or along side surface part 21B, 22B, 21C, can not interfere between other cooling air stream that the Sirocco fan 71 of 22C sucks, so each fan is can be from space separately air-breathing and send into sufficient cooling air to the cooling object, and, can also realize preventing each fan airflow the turbulent flow that interference produced generation and prevent noise.In addition owing to be provided with fixed foot portion 26 and adjusting on the bottom surface sections 22A of outer installation shell 2 of foot 27, air-breathing peristome 30 and near configuration drawing fan 63, so be easy to realize miniaturization on the plan view of projector 1.

(3-2) the suction face 63A owing to drawing fan 63 disposes obliquely with respect to the bottom surface sections 22A that is formed with air-breathing peristome 30, projector 1 is being configured to when being provided with on the platform etc. even if make, peristome 30 is approaching with the face that platform is set, also can leave the suction face 63A of predetermined distance ground configuration drawing fan 63 with the face that platform is set, thereby near the suction face 63A of drawing fan 63, guaranteed the space, the sufficient cooling air of shell 2 inner importings so drawing fan 63 can outwards be installed reliably, and, near the turbulent flow of generation drawing fan 63 can be prevented and noise can be prevented.That is, even if under the suction face of drawing fan and the close state of the face that platform is set, also can prevent to prevent to produce fricative along with the rotation of drawing fan is blocked airflow by casing and caused soakage to reduce.

(3-3) owing to the bottom surface sections 22A with respect to outer installation shell 2 disposes drawing fan 63 obliquely, make drawing fan 63 and air-breathing peristome 30 leave a distance, just be difficult to spill so be accompanied by the noise of the rotation of drawing fan 63 to the outside, thus the quietness of raising projector 1.

(3-4) because can be by means of outside power supply unit 61, the lamp driver element 62 that directly imports the cooling air cooling as pyrotoxin of cooling system B, so can cool off them effectively from outer installation shell 2.

(3-5) owing to make the cooling system B and other cooling system A that cool off power supply unit 61 and lamp driver element 62 independent, so remove and more effectively to cool off outside these unit, and the heat that is taken place in these unit impact can not for other cooling system, can also improve the cooling effectiveness of other cooling system A.

(3-6) since the suction face 63A of drawing fan 63 with respect to the face tilt configuration of the bottom surface sections 22A that is formed with air-breathing peristome 30, so can make the air flow horizontal direction that drinks up from vertical direction.Promptly, even make by means of drawing fan 63 and drink up the cooling air of discharging obliquely upward cooling system B from the below of outer installation shell 2 along the bottom surface sections 22A circulation of outer installation shell 2, can adopt the way that forms cooling flowing path with other cooling system A side by side, make the cooling system B of power supply unit 61 and lamp driver element 62 independent with other cooling system A reliably.In addition, the cooling system B along the bottom surface sections 22A of outer installation shell 2 circulation can cool off the scope more wide from the plane.

(3-7) because usefulness tabular body 64 becomes the district to cooling system B with other spatial division, and can be fully independent with other cooling system A, so can cool off power supply unit 61, lamp driver element 62 effectively.

(3-8) because can be according to the febrile state of power supply unit 61, lamp driver element 62, adjust the angle of inclination of the deflation area 63B of drawing fan 63, the shape of cylindrical body 612, the shape of wind guide component 65, and make and can import cooling air to each cylindrical body 612, wind guide component 65 pari passu, so can further improve their cooling effectiveness.In addition, owing to constitute cylindrical body 612 and wind guide component 65 with metal, and can make it to have the function of electromagnetic screen, so no longer need this structure base board 611, lamp driver element 62 to take the EMI countermeasure in addition, can simplify the internal structure of projector 1 to power supply unit 61.

(3-9) owing to drawing fan 63 is installed on the cylindrical body 612 of power supply unit 61, so drawing fan 63 during with respect to the bottom surface sections 22A tilted configuration of outer installation shell 2, the support member of drawing fan 63 need be set in addition on bottom surface sections 22A, thereby make the further simplification of internal structure of projector 1 and can realize miniaturization.

(3-10) since by with the suction face 63A of drawing fan 63 with respect to the bottom surface sections 22A tilted configuration that is formed with air-breathing peristome 30, make the air that drinks up from vertical direction to flow to horizontal direction, thereby can suitably select discharge directions, so can increase the degree of freedom of the stream of selecting the cooling air stream corresponding with the internal structure of projector 1.

(3-11) the cooling system B of the cooling system A of cooling optical unit 4 and control basal plate 5 and cooling supply unit, though be respectively cooling flowing path independently, owing to discharge from shared exhaust port portion 35, so can simplify the shaping of casing, and discharge direction that is easy to manage air.

(3-12) because as the inside window shutter 83 of the exhaust component of cooling system A, as the peristome 612g of the exhaust component of cooling system B1 with as the peristome 65b of the exhaust component of cooling system B2, in its zone, be configured to the peristome 35 that forms in the face of on the casing 23 in front, so can carry out the discharge of the cooling air of cooling system A, cooling system B1 and B2 from exhaust port portion 35 interior different zones.Therefore, the cooling air of cooling system A, cooling system B1 and B2 stream is even if owing to also can discharge uninterruptedly each other, so the cooling air of the inside of projector 1 can flow swimmingly, can carry out the cooling of projector 1 inside effectively when discharging.

(3-13) because the suction face 63A of drawing fan 63 is configured to along with close exhaust port portion 35 obliquely near air-breathing peristome 30, make the suction face 63A of drawing fan 63 become to facing the direction opposite, carried out the air that cooling heats up because of other thermal source portion projector 1 inside so can prevent that drawing fan 63 from sucking once more from what exhaust port portion 35 discharged with exhaust port portion 35.By means of this, drawing fan 63 just can suck the low air of temperature of projector 1 outside more.

(4) distortion of example

The present invention is not limited to above-mentioned example, also comprises such distortion as follows.

In above-mentioned example, though with respect to the drawing fan 63 of the cooling system B of the bottom surface sections 22A tilted configuration power supply unit 61 of outer installation shell 2 and lamp driver element 62,, the present invention is not limited to this.That is, drawing fan is configured in optical devices 44 under situation under, also can adopt the present invention.

In addition, in above-mentioned example, though make cooling system B and cooling system A independent by means of tabular body 64, the present invention is not limited to this.That is, also can adopt the way that duct-like member is connected on the peristome 30 to make cooling system independent.

Have again, in above-mentioned example, though be in the L shaped substantially optical unit 4 of plan view, to adopt the present invention,, be not limited to this, also can adopt the present invention in the optical unit 4 of U-shaped substantially at plan view.In this case, power supply unit etc. is configured on the middle body of U-shaped, so it is more effective to improve the present invention of cooling effectiveness of these unit owing to can adopt.

In addition, in above-mentioned example, though what use is 2 lens arras 120,130 that the light of light source 110 are divided into a plurality of segment beams,, also can in the projector that does not use such lens arra, use the present invention.

In addition, in above-mentioned example, though the modulation of the light beam that penetrates from light source carry out by means of liquid crystal panel 441R, 441G and 441B,, be not limited to this, also can in the optic modulating device that uses minitype reflector, adopt the present invention.In above-mentioned example, though the example of the projector that is to use 3 optic modulating devices of explanation,, the present invention also can use in using the projector of 1,2,4 or above optic modulating device.

Also have, in above-mentioned example, though explanation is that the present invention is applied to example under the situation of projector of through mode, the present invention also can use in reflective projector.Here, so-called " through mode " means that the light valve of liquid crystal panel etc. is the type that sees through light, and so-called " reflective " means that then light valve is catoptrical type.Under the situation of reflection type projection instrument, light valve can only constitute with liquid crystal panel, and does not need a pair of polaroid.In addition, under the situation of reflection type projection instrument, the cross colour splitting prism can be used as the coloured light tripping device that illumination light is separated into the light of red, green, blue 3 looks, simultaneously, sometimes also can be used as once more the light of synthetic modulated 3 looks and the coloured light synthesizer that penetrates to same direction.In addition, also can use colour splitting prism rather than the use cross colour splitting prism that the colour splitting prism of a plurality of triangular prisms or quadrangular prism shape is combined.The present invention is being applied under the situation of reflective projector, also can obtaining the effect same substantially with the projector of through mode.In addition, light valve is not limited to liquid crystal panel, for example, also can be to use the light valve of minitype reflector.

As projector, carry out the front projector of image projection and carry out the back projector of image projection though have from a side opposite with the direction of observing the projecting plane from the direction of observing the projecting plane,, the formation of above-mentioned example is no matter can use in any formation.

In addition, concrete structure when enforcement is of the present invention and shape etc. also can become other structure in the scope that can realize purpose of the present invention.

Claims (11)

1. projector, it possesses: light source, the light beam that penetrates from above-mentioned light source according to image information modulation form the optic modulating device of optical image and take in the casing of above-mentioned light source and above-mentioned optic modulating device, and enlarge the optical image that projection is formed by above-mentioned optic modulating device, it is characterized in that possessing:

The foot of the projected position of the optical image that being set to can be flexible from the outer peripheral face of above-mentioned casing, adjust extended projection;

The air-breathing peristome that on the face of the above-mentioned casing that above-mentioned foot is set, forms; With

Be arranged near the above-mentioned air-breathing peristome of above-mentioned box house, from the outside drawing fan that imports cooling air of above-mentioned casing,

Wherein, the suction face of above-mentioned drawing fan is with respect to the face tilt ground configuration of the above-mentioned casing that is formed with above-mentioned air-breathing peristome.

2. projector according to claim 1 is characterized in that:

Possess the light source driving circuit that is used for driving usefulness to the power circuit of above-mentioned light source and above-mentioned optic modulating device supply capability and above-mentioned light source,

Above-mentioned drawing fan is used to cool off in the cooling flowing path of above-mentioned power circuit and light source driving circuit.

3. projector according to claim 2 is characterized in that:

Be set with the cooling flowing path of the cooling air that imports by above-mentioned drawing fan independently with other cooling flowing path.

4. projector according to claim 3 is characterized in that:

Above-mentioned cooling flowing path is constituted as and makes above-mentioned cooling air logical along the surface current of the above-mentioned casing that is formed with above-mentioned air-breathing peristome.

5. according to claim 3 or 4 described projector, it is characterized in that:

Above-mentioned cooling flowing path is divided from the upright tabular body that is provided with of above-mentioned casing inner face.

6. according to any one the described projector in the claim 2～5, it is characterized in that:

Above-mentioned power circuit and above-mentioned light source driving circuit are surrounded by the wind guiding member of tubular respectively, are fed in each wind guiding member from the cooling air of above-mentioned drawing fan.

7. projector according to claim 6 is characterized in that:

Above-mentioned drawing fan is installed on the above-mentioned wind guiding member.

8. projector according to claim 1 is characterized in that:

Above-mentioned air-breathing peristome is the 1st air-breathing peristome,

Above-mentioned drawing fan is the 1st drawing fan,

On the side of above-mentioned casing, possess the air that makes above-mentioned box house to the outside exhaust port portion that discharges of above-mentioned casing,

Wherein, possess:

The 2nd air-breathing peristome of on above-mentioned casing, turning up the soil and being provided with the above-mentioned the 1st air-breathing opening portion;

Be arranged on above-mentioned the 2nd air-breathing peristome neighbouring, from outside the 2nd drawing fan that imports cooling air of above-mentioned casing;

By importing above-mentioned casing air outside from the above-mentioned the 2nd air-breathing peristome to above-mentioned box house by above-mentioned the 2nd drawing fan, make it to flow to above-mentioned exhaust port portion and to flow to the outside mode of discharging of above-mentioned casing, cool off the 1st cooling system of above-mentioned optic modulating device and above-mentioned light source from above-mentioned exhaust port portion; With

By importing above-mentioned casing air outside from the above-mentioned the 1st air-breathing peristome to above-mentioned box house by above-mentioned the 1st drawing fan, make it to flow to above-mentioned exhaust port portion and to flow to the outside mode of discharging of above-mentioned casing, cool off the 2nd cooling system of above-mentioned power circuit and above-mentioned light source driving circuit from above-mentioned exhaust port portion.

9. projector according to claim 8 is characterized in that:

Above-mentioned the 1st cooling air stream and above-mentioned the 2nd cooling air stream, in above-mentioned exhaust port portion from separately zone discharge.

10. it is characterized in that according to Claim 8 or 9 described projector:

Above-mentioned power circuit is configured in the 1st wind guiding member of tubular;

Above-mentioned light source driving circuit is configured in the 2nd wind guiding member of tubular;

The part of above-mentioned the 2nd cooling air stream is imported in above-mentioned the 1st wind guiding member, and another part of above-mentioned the 2nd cooling air stream is imported in above-mentioned the 2nd wind guiding member;

Airflow that comes from the circulation of above-mentioned the 1st wind guiding member and the airflow that comes from above-mentioned the 2nd wind guiding member circulation are discharged from zone separately in above-mentioned exhaust port portion.

11. the described projector of any one according to Claim 8～10 is characterized in that:

The suction face of above-mentioned the 1st drawing fan be configured to obliquely along with to above-mentioned exhaust port portion near and away from the above-mentioned the 1st air-breathing peristome.

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