CN101324746B - Projector - Google Patents

Abstract

The invention provides a projector (1) which comprises optical components arranged inside a sealed structure with an annular ventilation path, and a circulating fan (72) for cycling the air in the ventilation path. The sealed structure comprises a optical component used case body (46) with a inlet for air to flow inside and an outlet for air to flow outside; a plurality of air duct components used for leading air into the optical component used case body (46) and leading the air which flows out of the case body into the optical component used case body (46) again; and a cooling device (71) with thermoelectric conversion components. The cooling device (71), the circulating fan (72) and the optical component used case body (46) are sequentially arranged in the ventilation direction in the ventilation path. The air duct component (73) arranged at the front part of the ventilation path in the air duct components is made of a material with the thermo-conductivity less than or equal to 0.9W/ (m*K).

Description

Projector

Technical field

The present invention relates to projector.

Background technology

In the past, known have possess: light supply apparatus; Light beam that penetrates from light supply apparatus according to image information modulation and the optic modulating device that forms optical image; With optical image is amplified and the projector of the projecting optical device of projection.

In this projector,, will cause the image quality deterioration of projected image if the surface attachment of optic modulating device has dust, oil smoke etc.And the general thermotolerance of optic modulating devices such as liquid crystal panel is relatively poor, so the heating that might produce because of the light beam irradiates from light supply apparatus produces the deterioration of being heated.

Therefore, for the image quality of stably guaranteeing projected image is also cooled off optic modulating device effectively, proposition has following structure, optic modulating device is configured in hermetically-sealed construction inside, utilize circulating fan to make the air circulation of hermetically-sealed construction inside, and utilize thermoelectric conversion elements such as Peltier's element to make the heat of the air of hermetically-sealed construction inside reject heat to hermetically-sealed construction outside (for example opening the 2000-298311 communique) with reference to the Japanese document spy.

, in the structure of described document record,, be provided with thermoelectric conversion element, optic modulating device, circulating fan successively along the circulating direction of air in hermetically-sealed construction inside.

But, in hermetically-sealed construction inside, owing to be formed on the structure that optic modulating device is set between thermoelectric conversion element and the circulating fan, so when near air circulating fan sucks optic modulating device and the air that will be cooled off by the heat-absorbent surface of thermoelectric conversion element were transported to optic modulating device, the air of described cooling was trapped between thermoelectric conversion element and the optic modulating device easily.Therefore, be difficult under the low-temperature condition that the heat-absorbent surface that utilizes thermoelectric conversion element is cooled, deliver air to optic modulating device, be difficult to cool off effectively optic modulating device.And,, for example need to increase the power consumption of the revolution or the thermoelectric conversion element of circulating fan in order to cool off optic modulating device effectively.

Therefore, expectation can stably be guaranteed the image quality of projected image and cool off the technology of opticses such as optic modulating device effectively.

Summary of the invention

Fundamental purpose of the present invention provides a kind of projector, and it can stably be guaranteed the image quality of projected image and cool off optics effectively.

Projector of the present invention has: optics is configured in and has the hermetically-sealed construction inside that makes the ring-type circulation of air path that air can circulate; Circulating fan with the air circulation that makes described ring-type circulation of air path, it is characterized in that, described hermetically-sealed construction constitutes and comprises: the used for optical part casing, take in the described optics of configuration in inside, and have the inflow entrance that passes air into inside and make air flow out to outside flow export; A plurality of air channels member, by described inflow entrance air is directed to described used for optical part box house, and will flow out to air outside from described used for optical part box house by described flow export, be directed to described used for optical part box house by described inflow entrance once more; And cooling device with thermoelectric conversion element, this thermoelectric conversion element has towards the heat-absorbent surface of described hermetically-sealed construction inside with towards the radiating surface of described hermetically-sealed construction outside, described cooling device, described circulating fan and the described used for optical part casing circulation of air direction in the described circulation of air path, with described cooling device, the order setting of described circulating fan and described used for optical part casing, from the stream leading portion crosswind road member of described cooling device, utilize pyroconductivity to constitute in the member of described a plurality of air channels smaller or equal to the material of 0.9W/ (mK) to described used for optical part casing guiding air.

According to the present invention, take in opticses such as configuration optic modulating device at the used for optical part box house that constitutes hermetically-sealed construction,, can stably guarantee attached on the optics so can prevent dust, oil smoke etc. from the image quality of the projected image of projector projection.

And, constituting cooling device, circulating fan and the used for optical part casing of hermetically-sealed construction, the circulation of air direction in the circulation of air path of hermetically-sealed construction inside is with the order setting of cooling device, circulating fan and used for optical part casing.Thus, circulating fan can suck the heat-absorbent surface cooled air by the thermoelectric conversion element that constitutes cooling device, and towards being contained the optics ejection that is configured in the used for optical part box house.That is, can under the low-temperature condition that the heat-absorbent surface that utilizes thermoelectric conversion element is cooled, carry air, can cool off optics effectively to optics.

Especially circulating fan is a Sirocco fan if adopt the centrifugal force fan, then can fully guarantee to spray the wind speed of pressure and the air that is sprayed, and can cool off optics effectively.

In addition, the stream leading portion crosswind road member in the member of a plurality of air channels utilizes pyroconductivity to constitute smaller or equal to the material of 0.9W/ (mK).Thus, by utilizing the fully low material of pyroconductivity to constitute stream leading portion crosswind road member, can prevent the heat of hermetically-sealed construction air outside and be located at the heat of the member of formation of hermetically-sealed construction outside, pass to from the air of cooling device towards the circulation of used for optical part casing by stream leading portion crosswind road member.Therefore, be fit to realize following effect, that is, can under the low-temperature condition that the heat-absorbent surface that utilizes thermoelectric conversion element is cooled, carry air, can cool off optics effectively to optics.

In addition, by adopting the above-mentioned structure that can effectively cool off optics, not needing increases the revolution of circulating fan more than or equal to necessary degree, realizes the low noise effect of projector.And not needing increases the power consumption of thermoelectric conversion element more than or equal to necessary degree, realizes the energy-saving effect of projector.

In projector of the present invention, from the stream rear section side air channel member of described used for optical part casing, utilize pyroconductivity to constitute in the member of preferred described a plurality of air channels more than or equal to the material of 42W/ (mK) to described cooling device guiding air.

According to the present invention, stream rear section side air channel member in the member of a plurality of air channels utilizes the fully high material of pyroconductivity to constitute as mentioned above, so can make the heat of the air that in the member of stream rear section side air channel, circulates, promptly via the heat of taking in the heated air of optics that is configured in the used for optical part box house, reject heat to the hermetically-sealed construction outside by stream rear section side air channel member.Therefore, the temperature of the air of advancing along the road can be set at fully low temperature in the circulation of air path of hermetically-sealed construction inside, can cool off optics more effectively.

In projector of the present invention, guide the stream rear section side air channel member of air in the member of preferred described a plurality of air channels to described cooling device from described used for optical part casing, have high heat conduction air channel portion in the position with described flow export plane earth interference, preferred described high heat conduction air channel portion utilizes pyroconductivity to constitute more than or equal to the material of 42W/ (mK).

In the present invention, the stream rear section side air channel member in the member of a plurality of air channels has the above-mentioned high heat conduction air channel portion that utilizes the fully high material of pyroconductivity to constitute in the position of interfering with the flow export plane earth.That is, in the member of stream rear section side air channel,, be provided with high heat conduction air channel portion via taking in the heated air of the optics that is configured in the used for optical part box house by the part that flow export can blow to.Thus, can make the heat of the air that in the member of stream rear section side air channel, circulates,, reject heat to the hermetically-sealed construction outside by high heat conduction air channel member promptly via the heat of taking in the heated air of optics that is configured in the used for optical part box house.Therefore, the temperature of the air of advancing along the road can be set at fully low temperature in the circulation of air path of hermetically-sealed construction inside, can cool off optics more effectively.

In projector of the present invention, preferred described stream rear section side air channel member utilizes described high heat conduction air channel portion and constitutes near these two parts of low heat conduction air channel portion that described used for optical part casing is provided with, and preferred described low heat conduction air channel portion utilizes pyroconductivity to constitute smaller or equal to the material of 0.9W/ (mK).

In the present invention, stream rear section side air channel member utilizes above-mentioned high heat conduction air channel portion and these two parts of low heat conduction air channel portion to constitute, and low heat conduction air channel portion utilizes the fully low material of above-mentioned pyroconductivity to constitute, and is provided with near the used for optical part casing.Thus, can prevent to pass to the heat of used for optical part casing, pass to the air that in the member of stream rear section side air channel, circulates by low heat conduction air channel portion from optics etc.Therefore, by utilizing these two parts of high heat conduction air channel portion and low heat conduction air channel portion to constitute stream rear section side air channel member, be fit to realize following effect, promptly, the temperature of the air of advancing along the road can be set at fully low temperature in the circulation of air path of hermetically-sealed construction inside, can cool off optics more effectively.

In projector of the present invention, preferred described cooling device has: be installed in the heat-absorbent surface of described thermoelectric conversion element and heat absorbing side thermal conductive member on the radiating surface and heat radiation side thermal conductive member in the mode that can transmit heat; And import air and be ejected into cooling fan on the described heat radiation side thermal conductive member from this projector outside to inside, preferred described projector has outer side air channel member, it will be from ejection of described cooling fan and the air by described heat radiation side thermal conductive member, is directed on the generating component of described hermetically-sealed construction outside of this projector inside.

According to the present invention, in cooling device, heat-absorbent surface and radiating surface at thermoelectric conversion element are equipped with heat absorbing side thermal conductive member and the heat radiation side thermal conductive member that can transmit heat, so can increase the surface area of the heat radiation side of the surface area of the heat absorbing side that absorbs heat and release heat.And cooling device has the cooling fan to heat radiation side thermal conductive member ejection air.Therefore, in cooling device, the absorption of heat and the heat radiation of heat can be implemented well, the air of in the circulation of air path of hermetically-sealed construction inside, advancing can be fully cooled off along the road.

And projector has outer side air channel member, so can will spray and flow to by the air of heat radiation side thermal conductive member the generating component of the hermetically-sealed construction outside of projector inside from cooling fan.Therefore, in projector, do not need to be provided with the special-purpose cooling fan of the described generating component of cooling, can reduce the quantity of cooling fan, and can simplify the cooling structure of the generating component of cooling and sealing structure outside.

In projector of the present invention, the control basal plate that preferably has the member of formation of this projector of control, preferred described used for optical part casing, guide the stream rear section side air channel member of air in the member of described a plurality of air channels to described cooling device from described used for optical part casing, and described control basal plate, according to described used for optical part casing, the sequential cascade setting of described stream rear section side air channel member and described control basal plate, preferred described outer side air channel member will be directed between described stream rear section side air channel member and the described control basal plate from ejection of described cooling fan and the air by described heat radiation side thermal conductive member.

According to the present invention, outer side air channel member will be directed between stream rear section side air channel member and the control basal plate from cooling fan ejection and the air by the heat radiation side thermal conductive member, so can utilize described air, cooling is owing to make the stream rear section side air channel member of temperature rising and be installed in circuit component on the control basal plate etc. via the heat of taking in the heated air of optics that is configured in the used for optical part box house, can prevent stream rear section side air channel member and the control basal plate deterioration of being heated.

In projector of the present invention, preferably have: control device applies voltage, the described thermoelectric conversion element of drive controlling to described thermoelectric conversion element; The heat absorbing side temperature detecting part detects the temperature that is installed in the heat absorbing side thermal conductive member on the heat-absorbent surface of described thermoelectric conversion element in the mode that can transmit heat; The atmosphere temperature detecting part, detect the atmosphere temperature of described hermetically-sealed construction outside, preferred described control device has: design temperature difference information storage part, the design temperature difference information of the design temperature difference correlation of the design temperature of storage and described heat absorbing side thermal conductive member and the setting atmosphere temperature of described hermetically-sealed construction outside; The polarity switch control portion, relatively by the detected temperatures of described heat absorbing side temperature detecting part detection and the atmosphere temperature that detects by described atmosphere temperature detecting part, more than or equal to based on the design temperature difference of described design temperature difference information the time, implement the polarity switching controls that the polarity of the voltage that imposes on described thermoelectric conversion element is switched in the detected temperatures difference of described detected temperatures and described atmosphere temperature.

, when driving projector, when driving thermoelectric conversion element, the relative atmosphere temperature of temperature of the heat-absorbent surface of thermoelectric conversion element low during more than or equal to necessary degree, will produce dewfall in the heat absorbing side of cooling device.And when the heat absorbing side of cooling device produced dewfall, the action that might produce cooling device was bad.

In the present invention, constitute the polarity switch control portion of the control device of thermoelectric conversion element, when driving thermoelectric conversion element, on the heat-absorbent surface that identification detects by the heat absorbing side temperature detecting part, be installed in thermoelectric conversion element in the mode that can transmit heat and transmit the detected temperatures of heat absorbing side thermal conductive member of heat of heat-absorbent surface and the atmosphere temperature of the hermetically-sealed construction outside detected by the atmosphere temperature detecting part, calculate poor (detected temperatures is poor) of detected temperatures and atmosphere temperature all the time.And, polarity switch control portion comparison detected temperatures difference and poor based on the design temperature that is stored in the design temperature difference information in the design temperature difference information storage part, in the detected temperatures difference during, implement to be used to switch the polarity switching controls of the polarity of the voltage that imposes on thermoelectric conversion element more than or equal to the design temperature difference.Promptly, by the polarity switching controls, switch the polarity (switching the flow direction of the electric current of thermoelectric conversion element) of the voltage that imposes on thermoelectric conversion element, thereby the one side towards hermetically-sealed construction inside in the thermoelectric conversion element is switched to radiating surface, the one side towards the hermetically-sealed construction outside in the thermoelectric conversion element is switched to heat-absorbent surface.Thus, in the detected temperatures difference during more than or equal to the design temperature difference, be the relative atmosphere temperature of temperature of heat-absorbent surface of thermoelectric conversion element low during more than or equal to necessary degree, implement the polarity switching controls, make thus in the thermoelectric conversion element towards the temperature of the one side of hermetically-sealed construction inside and rise, can prevent that the heat absorbing side (hermetically-sealed construction private side) at cooling device from producing dewfall, prevent that the action of the cooling device that causes because of dewfall is bad.

In projector of the present invention, preferably has the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling, preferred described control device has the rectangle control part of implementing following rectangle control, promptly, when the driving of described thermoelectric conversion element begins, be increased to common magnitude of voltage with making magnitude of voltage stage of imposing on described thermoelectric conversion element, when the driving of described thermoelectric conversion element stops, the magnitude of voltage that imposes on described thermoelectric conversion element is reduced from described common magnitude of voltage stage ground.

; when the driving of thermoelectric conversion element begins; during common magnitude of voltage when at short notice thermoelectric conversion element being applied common driving, the slope that the temperature of the heat absorbing side of cooling device descends is bigger, and the slope that the temperature of the heat radiation side of cooling device rises is bigger.Under the bigger situation of the slope of temperature variation, because the thermal stress between each member of formation cooling device makes that the connection status between each member is destroyed, the action that might produce cooling device is bad like this.In addition, when the driving of thermoelectric conversion element stops, the magnitude of voltage that imposes on thermoelectric conversion element is changed under the situation of 0V at short notice from common magnitude of voltage, same as described above, the action that might produce cooling device is bad.

In the present invention, constitute the rectangle control part of the control device of thermoelectric conversion element, when the driving of thermoelectric conversion element begins, implement rectangle control, make the magnitude of voltage that imposes on thermoelectric conversion element from the 0V stage be increased to common magnitude of voltage.Thus, compare when as top, at short notice thermoelectric conversion element being applied common magnitude of voltage, can reduce the slope that the temperature of the heat absorbing side of cooling device descends, reduce the slope that the temperature of the heat radiation side of cooling device rises.Therefore, can relax the thermal stress between each member that constitutes cooling device, prevent that the action of cooling device is bad.

And the rectangle control part is implemented rectangle control when the driving of thermoelectric conversion element stops, making the magnitude of voltage that imposes on thermoelectric conversion element from the common magnitude of voltage stage be reduced to 0V.Thus, with as top, make the magnitude of voltage that imposes on thermoelectric conversion element and when common magnitude of voltage changes to 0V, compare at short notice, can reduce the slope that the temperature of the heat absorbing side of cooling device rises, reduce the slope that the temperature of the heat radiation side of cooling device descends.Therefore, can relax the thermal stress between each member that constitutes cooling device, prevent that the action of cooling device is bad.

In projector of the present invention, preferably have: the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling; With the Inside Air Temperature test section of the air themperature that detects described hermetically-sealed construction inside, preferred described control device has: the design temperature information storage part, store the design temperature information relevant with the air design temperature of described hermetically-sealed construction inside; The duty cycle information storage part, storage and the relevant duty cycle information of stipulating of dutycycle; The dutycycle control part, the detected temperatures that detects by described Inside Air Temperature test section and relatively based on the design temperature of described design temperature information, during smaller or equal to described design temperature, implement intermittently to drive the dutycycle control of described thermoelectric conversion element in described detected temperatures with dutycycle based on described duty cycle information.

At this, duty cycle information is when intermittently driving thermoelectric conversion element, with the driving time of the time per unit that thermoelectric conversion element is applied voltage with thermoelectric conversion element is not applied the relevant information of ratio (dutycycle) of non-driving time of the time per unit of voltage.

In the present invention, constitute the dutycycle control part of the control device of thermoelectric conversion element, when driving thermoelectric conversion element, identification all the time is by the detected temperatures of the air of the hermetically-sealed construction inside of Inside Air Temperature test section detection.And, dutycycle control part comparison detected temperatures and based on the design temperature that is stored in the design temperature information in the design temperature information storage part, when the driving of detected temperatures during smaller or equal to design temperature, thermoelectric conversion element is stablized, the control of enforcement dutycycle makes intermittently to drive thermoelectric conversion element based on the dutycycle that is stored in the duty cycle information in the duty cycle information storage part.Thus, for example after the driving of thermoelectric conversion element is stable, relatively, also can often reduce the power consumption of thermoelectric conversion element when thermoelectric conversion element is applied constant common magnitude of voltage, realize the energy-saving effect of projector.And dutycycle control is enforcement after the driving of thermoelectric conversion element is stable, so can fully guarantee the cooling effectiveness of the air of advancing along the road in the circulation of air path of hermetically-sealed construction inside in cooling device.

In projector of the present invention, preferably have: the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling; With the Inside Air Temperature test section of the air themperature that detects described hermetically-sealed construction inside, preferred described control device has: the design temperature information storage part, store the design temperature information relevant with the air design temperature of described hermetically-sealed construction inside; The driving time information storage part, store the common driving time information relevant with the driving time of the described thermoelectric conversion element of common driving and with the relevant low voltage drive temporal information of driving time of the low described thermoelectric conversion element of magnitude of voltage low voltage drive of the common magnitude of voltage that applies with than described common driving the time; The voltage switch control portion, the detected temperatures that detects by described Inside Air Temperature test section and relatively based on the design temperature of described design temperature information, in described detected temperatures during smaller or equal to described design temperature, according to described common driving time information and described low voltage drive temporal information, implement to repeat the voltage switching controls of described common driving and described low voltage drive.

In the present invention, constitute the voltage switch control portion of the control device of thermoelectric conversion element, when driving thermoelectric conversion element, identification all the time is by the detected temperatures of the air of the hermetically-sealed construction inside of Inside Air Temperature test section detection.And, voltage switch control portion comparison detected temperatures and based on the design temperature that is stored in the design temperature information in the design temperature information storage part, in detected temperatures during smaller or equal to design temperature, be that the driving of thermoelectric conversion element is when stablizing, implement the voltage switching controls, make repetition based on the driving time that is stored in the common driving time information in the driving time information storage part, thermoelectric conversion element is applied the common driving of common magnitude of voltage, based on the driving time that is stored in the low-voltage temporal information in the driving time information storage part, thermoelectric conversion element is applied the low voltage drive of the magnitude of voltage lower than common magnitude of voltage.Thus, for example after the driving of thermoelectric conversion element is stable, relatively, also can often reduce the power consumption of thermoelectric conversion element when thermoelectric conversion element is applied constant common magnitude of voltage, realize the energy-saving effect of projector.And the voltage switching controls is enforcement after the driving of thermoelectric conversion element is stable, so can fully guarantee the cooling effectiveness of the air of advancing along the road in the circulation of air path of hermetically-sealed construction inside in cooling device.

Description of drawings

Fig. 1 is the stereographic map of outward appearance of the projector of expression the 1st embodiment.

Fig. 2 watches the lower house of described the 1st embodiment and the stereographic map of procapsid from lower side.

Fig. 3 is the figure of inner structure of the projector of described the 1st embodiment of expression.

Fig. 4 is the figure of inner structure of the projector of described the 1st embodiment of expression.

Fig. 5 is the figure of inner structure of the projector of described the 1st embodiment of expression.

Fig. 6 is the figure of inner structure of the projector of described the 1st embodiment of expression.

Fig. 7 is the figure of structure of the optical unit of described the 1st embodiment of expression.

Fig. 8 is the figure of structure of the optical unit of described the 1st embodiment of expression.

Fig. 9 is the figure of structure of the optical unit of described the 1st embodiment of expression.

Figure 10 is the circulate figure of structure of air-cooled unit of the sealing of described the 1st embodiment of expression.

Figure 11 is the circulate figure of structure of air-cooled unit of the sealing of described the 1st embodiment of expression.

Figure 12 is the circulate figure of structure of air-cooled unit of the sealing of described the 1st embodiment of expression.

Figure 13 is the circulate figure of structure of air-cooled unit of the sealing of described the 1st embodiment of expression.

Figure 14 is the circulate figure of structure of air-cooled unit of the sealing of described the 1st embodiment of expression.

Figure 15 is the stereographic map of structure of the cooling device of described the 1st embodiment of expression.

Figure 16 is the figure of structure of the Peltier unit of described the 1st embodiment of expression.

Figure 17 is the figure of structure of the Peltier unit of described the 1st embodiment of expression.

Figure 18 is the figure of structure of the Peltier unit of described the 1st embodiment of expression.

Figure 19 is the stereographic map of the outer side air channel member of described the 1st embodiment of expression.

Figure 20 is the block scheme of control structure of schematically representing the Peltier element of described the 1st embodiment.

Figure 21 is the process flow diagram of control method of the Peltier element of described the 1st embodiment of explanation.

Figure 22 is the figure based on an example of the rectangle of rectangle control part control of described the 1st embodiment of expression.

Figure 23 is the block scheme of control structure of schematically representing the Peltier element of the 2nd embodiment.

Figure 24 is the process flow diagram of control method of the Peltier element of described the 2nd embodiment of explanation.

Figure 25 is the figure based on an example of the dutycycle of dutycycle control part control of described the 2nd embodiment of expression.

Figure 26 is the block scheme of control structure of schematically representing the Peltier element of the 3rd embodiment.

Figure 27 is the process flow diagram of control method of the Peltier element of described the 3rd embodiment of explanation.

Figure 28 is the figure based on an example of the voltage switching controls of voltage switch control portion of described the 3rd embodiment of expression.

Figure 29 is the figure of the variation of described the 2nd embodiment of expression and the 3rd embodiment.

Embodiment

[the 1st embodiment]

The 1st embodiment of the present invention below is described with reference to the accompanying drawings.

[1. outward appearance constitutes]

Fig. 1 is the stereographic map of outward appearance of the projector 1 of expression the 1st embodiment.Specifically, Fig. 1 is the stereographic map when the front upper side is watched projector 1.In addition, in Fig. 1, for convenience of explanation, the projecting direction of optical image is made as the Z axle, two axles with this Z axle quadrature are made as X-axis (transverse axis) and Y-axis (Z-axis) respectively.This is also identical to later accompanying drawing.

Projector 1 forms optical image according to image information modulation from the light beam that light source penetrates, with formed optical image enlarging projection on screen (omitting diagram).This projector 1 has roughly rectangular-shaped outer vanning body 2 and projecting lens 3 as projecting optical device of exposing of vanning body 2 outside this as shown in Figure 1.

Projecting lens 3 constitutes the group lens of having taken in a plurality of lens in the tubular lens barrel, the optical image of the apparatus main body enlarging projection that utilizes projector 1 after according to the image information modulation.This projecting lens 3 has the adjuster bar 3A of relative position of a plurality of lens of change, and it constitutes focusing adjustment and the multiplying power adjustment that can carry out optical image that will projection.

Outer vanning body 2 is plastic casings, takes in the apparatus main body of projector 1.Should case body 2 outward as shown in Figure 1, have: upper shell 21, the top part of its cladding system main body, the part of previous section, the part of lateral parts and the part of back portion; Lower house 22, the bottom part of its cladding system main body, the part of previous section, the part of lateral parts and the part of back portion; With procapsid 23, the part of the previous section of its cladding system main body.

In the upper part of upper shell 21, on+X-direction side (right side when the place ahead is watched), as shown in Figure 1, be formed with the recess 211 of the private side depression of outside vanning body 2, have peristome 211A with internal run-through at the bottom of recess 211 branch.And the adjuster bar 3A of projecting lens 3 exposes by this peristome 211A, can carry out the operation of adjuster bar 3A.

And, in the upper part of upper shell 21,, as shown in Figure 1, be provided with the starting of the enforcement projector 1 that extends at left and right directions and adjust the guidance panel of operating 212 in the substantial middle part of plane apparent time.If suitably the action button 212A of push panel 212 then will touch the operation switch that is installed on the not shown circuit substrate that is configured in action button 212A inside, thereby can carry out desired operation.

In addition, the circuit substrate of aforementioned operation panel 212 is electrically connected with control basal plate described later, and the operation signal of pressing formation of attended operation button 212A is output to control basal plate.

And, in the back portion of upper shell 21,,, be formed with power supply air intake opening outward with the inside and outside connection of the body 2 of casing though omitted concrete diagram on-X-direction side (right side when the rear is watched).This power supply air intake opening is the opening that is used for the cooling air of body 2 outsides of casing is imported outer vanning body 2 inside outward, utilize the box house cooling device described later of the constituent apparatus main body of outer vanning body 2 inside, the cooling air of outer vanning body 2 outsides is imported into inside by this power supply with air intake opening, and is fed to the power supply unit of constituent apparatus main body.

Fig. 2 is the stereographic map when the front lower side is watched lower house 22 and procapsid 23.

In the bottom surface portions of lower house 22 ,-the X-direction side, as shown in Figure 2, be formed with the rectangular opening of plane apparent time 221, at this opening 221 apparent time rectangular tabular lid 222 in plane can be installed with freely loading and unloading.

And, though omitted concrete diagram, with lid 222 when lower house 22 unloads, the part of the light supply apparatus described later of the constituent apparatus main body of body 2 inside of casing is outward exposed, and can change described light supply apparatus by opening 221.

And, in the bottom surface portions of lower house 22, relative opening 221-Z-direction side (rear side), as shown in Figure 2, be formed with the light source of the inside and outside connection of the body 2 of casing outward with air intake opening 223.

This light source is the openings that the cooling air of body 2 outsides of casing imported outer vanning body 2 inside outward with air intake opening 223, utilize the box house cooling device described later of the constituent apparatus main body of outer vanning body 2 inside, the cooling air of outer vanning body 2 outsides is imported into inside by this light source with air intake opening 223, and is fed to described light supply apparatus.

And, in lower house 22+lateral parts of X-direction side in, in+Z-direction side (front face side), as shown in Figure 2, be formed with the cooling device of the inside and outside connection of the body 2 of casing outward with air intake opening 224.

This cooling device is the openings that the cooling air of body 2 outsides of casing imported outer vanning body 2 inside outward with air intake opening 224, utilize the sealing described later of the constituent apparatus main body of the outer vanning body 2 inside air-cooled unit that circulates, the cooling air of outer vanning body 2 outsides is imported into inside by this cooling device with air intake opening 224, and is transported to the circulate heat radiation side of Peltier unit of air-cooled unit of the described sealing of formation.

And, in the back portion of lower house 22,, be formed with the power supply of the inside and outside connection of the body 2 of casing outward with air intake opening 225 (with reference to Fig. 3～Fig. 5) in-X-direction side.This power supply is identical with air intake opening with air intake opening 225 and the power supply that is formed at upper shell 21, is to utilize will the case cooling air of body 2 outsides of described box house cooling device to flow to the opening of the described power supply unit of inside with air intake opening 225 by power supply outward.

In procapsid 23 ,+the X-direction side, as Fig. 1 or shown in Figure 2, be formed with circular hole 231, the fore-end of projecting lens 3 exposes by circular hole 231.That is, by circular hole 231 from projecting lens 3 enlarging projection optical images and projection on screen.

And, in procapsid 23,,, be formed with telepilot sensitization window 232 as Fig. 1 or shown in Figure 2 in X-direction substantial middle part.And, dispose not shown telepilot sensor devices in the inboard of this control device sensitization window 232, be used to receive operation signal from not shown telepilot.

In addition, on telepilot, be provided with and identical switches such as the starting switch of being located at described guidance panel 212, by-pass cock, if remote controller, then from the infrared signal of telepilot output to operating, infrared signal passes through telepilot sensitization window 232 by the sensitization of telepilot sensor devices, and processed in control basal plate described later.

In addition, in procapsid 23 ,-the X-direction side, as Fig. 1 or shown in Figure 2, the air that is formed with body 2 inside of casing outward is discharged to outside exhausr port 233.As Fig. 1 or shown in Figure 2, be provided with at this exhausr port 233 a plurality of cowling panel 234A are arranged in cancellate vent window 234.As Fig. 1 or shown in Figure 2, a plurality of cowling panel 234A form its plate face and are leaving the direction inclination predetermined angular of projecting lens 3 with respect to the YZ plane.And, utilize described box house cooling device, the air of body 2 inside of casing outward by exhausr port 233 and vent window 234 in the direction of leaving projecting lens 3 by rectification and be discharged from.

[2. inner structure]

Fig. 3～Fig. 6 is the figure of the inner structure of expression projector 1.Specifically, Fig. 3 is the state of upper shell 21 is unloaded in expression from state shown in Figure 1 figure.Fig. 4 is the state of control basal plate 6 is unloaded in expression from state shown in Figure 3 figure.Fig. 5 is state shown in Figure 4 is watched in expression from rear side a stereographic map.The stereographic map that Fig. 6 is expression when downside is watched the apparatus main body except that control basal plate 6 of projector 1.

Case the outside inside of body 2, as Fig. 3～apparatus main body that contains projector 1 shown in Figure 6, this apparatus main body has optical unit 4, power supply unit 5, control basal plate 6 (Fig. 3), the air-cooled unit 7 of sealing circulation (Fig. 4～Fig. 6) and box house cooling device 8.

[structure of 2-1. optical unit]

Fig. 7～Fig. 9 is the figure of the structure of expression optical unit 4.Specifically, Fig. 7 is the state of Peltier heat radiation wind exhaust unit 81 that constitutes box house cooling device 8 and the stream rear section side air channel member 74 that seals the air-cooled unit 7 of circulation is unloaded in expression from state shown in Figure 4 figure.Fig. 8 is the stream leading portion crosswind road member 73 of the cold unit 7 of lower seal recirculating air is unloaded in expression from the state shown in Figure 6 figure of state.Fig. 9 is a planimetric map of schematically representing the optical system of optical unit 4.

Optical unit 4 is under the control of control basal plate 6, form image light according to image information, as shown in Figure 7, roughly be the U word shape in the plane apparent time, extend the crooked extension of-Z-direction end edge+X-direction crooked extension of edge+Z-direction again along Z-direction towards rear side from the front face side of outer vanning body 2.This optical unit 4 has light supply apparatus 41, even lamp optical system 42, color separation optical system 43, relay optical system 44, optical devices 45, used for optical part casing 46 as shown in Figure 9.

Light supply apparatus 41 will align and ejaculation illumination optics device 45 from the light beam of illuminator 411 radiation at certain orientation.This light supply apparatus 41 as shown in Figure 9, its constitute have illuminator 411, catoptron 412 and keep their lamp housing 413 (Fig. 8).This light supply apparatus 41 is contained and is configured in the light supply apparatus incorporating section 4611 that is connected with used for optical part casing 46 (Fig. 8).Light supply apparatus 41 is configured in the light supply apparatus incorporating section 4611 by being contained, and is positioned in assigned position with respect to used for optical part casing 46 (central shaft of the light beam that penetrates from light supply apparatus 41 and the lighting optical axis A consistent location of setting used for optical part casing 46 in).

As illuminator 411, use Halogen lamp LED, metal halide lamp or high-pressure mercury-vapor lamp more.

As catoptron 412, make from the light beam almost parallel of illuminator 411 ejaculations and the parabolic reflector of reflection.In addition, as catoptron 412, except that parabolic reflector, also can use with the parallelization lens combined so that the light beam that penetrates from illuminator 411 is converged in the elliptical mirror that the mode of assigned position reflects.

Evenly lamp optical system 42 is to be divided into a plurality of segment beams from the light beam that light supply apparatus 41 penetrates, and makes the interior uniform optical system of illumination of face of field of illumination.This even lamp optical system 42 has the 1st lens arra the 421, the 2nd lens arra 422, polarized light conversion element 423, catoptron 424 and overlapping lens 425 as shown in Figure 9.

The 1st lens arra 421 has the function that the light beam that will be divided into a plurality of segment beams from the light beam that light supply apparatus 41 penetrates is cut apart optical element, its constitute have with the face of lighting optical axis A quadrature in be aligned to rectangular a plurality of lenslets.

The 2nd lens arra 422 is the optical element of a plurality of segment beam optically focused that will cut apart by above-mentioned the 1st lens arra 421, and is identical with the 1st lens arra 421, its constitute have with the face of lighting optical axis A quadrature in be aligned to rectangular a plurality of lenslets.

Polarized light conversion element 423 is that the direction of polarized light of the various piece light beam that will cut apart by the 1st lens arra 421 is aligned to the roughly polarized light conversion element of the rectilinearly polarized light of a direction.

This polarized light conversion element 423, though omitted diagram, the polarized light separation membrane and the reflectance coating that have relative lighting optical axis A tilted configuration replace structure arranged.Polarized light separation membrane, the side's polarized light light beam in P polarized light light beam that comprises in the transmission various piece light beam and the S polarized light light beam, and reflection the opposing party's polarized light light beam.The opposing party's of being reflected polarized light light beam is by the reflectance coating warpage, to the ejaculation direction of side's polarized light light beam, promptly to the direction ejaculation along lighting optical axis A.The polarizer of the light beam outgoing plane of the either party of emitted polarized light light beam by being located at polarized light conversion element 423 carries out the polarized light conversion, with the roughly direction of polarized light alignment of all polarized light light beams.By using this polarized light conversion element 423, can be the polarized light light beam of a roughly direction with the beam alignment that penetrates from light supply apparatus 41, can improve the utilization factor of the light source light of in optical devices 45, using.

Overlapping lens 425 are to be used for a plurality of segment beams of optically focused after through the 1st lens arra the 421, the 2nd lens arra 422, polarized light conversion element 423 and catoptron 424, and make the optical element on the image forming area of 3 liquid crystal panels of its aftermentioned that overlaps optical devices 45.

Color separation optical system 43 as shown in Figure 9, have two dichronic mirrors 431,432 and catoptron 433, have and utilize dichronic mirror 431,432 will be separated into the function of the light of red (R), green (G), blue (B) three kinds of colors from a plurality of segment beams that even lamp optical system 42 penetrates.

Dichronic mirror the 431, the 432nd, optical element is formed with the wavelength selective membrane of the light beam of the light beam in reflection provision wavelengths zone and other wavelength region may of transmission on substrate.And the dichronic mirror 431 that is configured in the light path leading portion is reflection of light mirrors of reflect blue light and other colors of transmission.The dichronic mirror 432 that is configured in the light path back segment is catoptrons of reflects green and transmits red.

Relay optical system 44 has light incident side lens 441, relay lens 443 and catoptron 442,444, has the function that the red light that will see through the dichronic mirror 431,432 of color separation optical system 43 is directed to optical devices 45.In addition, this relay optical system 44 being set on the light path of red light, is in order to prevent because the optical path length of red light is longer than the optical path length of other color of light, because the reduction of the light utilization ratio that causes such as dispersing of light.In the present embodiment, because the optical path length of red light is longer, thus form this structure, but the structure in the light path that also can consider to prolong the optical path length of blue light and relay optical system 44 is used in blue light.

Blue light after separating by above-mentioned dichronic mirror 431 via catoptron 433 warpages after, offer optical devices 45 by field lens 455.And, directly offer optical devices 45 by field lens 455 by the green light after dichronic mirror 432 separation.In addition, red light offers optical devices 45 by field lens 455 then by constituting the lens 441,443 and catoptron 442,444 optically focused and the warpages of relay optical system 44.In addition, being located at the field lens 455 of light path leading portion of the shades of colour light of optical devices 45, is to be provided with for the parallel light beam of chief ray of each several part light beam relatively for the each several part Beam Transformation that will penetrate from the 2nd lens arra 422.

Optical devices 45 light beam that modulation is injected according to image information also forms coloured image.These optical devices 45 as shown in Figure 9, it constitutes and has 3 liquid crystal panels 451 as optic modulating device of becoming lighting object (liquid crystal panel that the liquid crystal panel that the liquid crystal panel of red light side is made as 451R, green light side is made as 451G, blue light side is made as 451B) and cross dichroic prism 453.In addition, between field lens 455 and each liquid crystal panel 451, get involved and be provided with light incident side polarization plate 452, between each liquid crystal panel 451 and cross dichroic prism 453, get involved and be provided with emitting side polarization plate 454, carry out the optical modulation of the shades of colour light that will inject by light incident side polarization plate 452, liquid crystal panel 451 and emitting side polarization plate 454.

Liquid crystal panel 451, enclosing electric optical material to a pair of transparent glass substrate sealing is liquid crystal, for example, multi-crystal TFT (Thin Film Transistor: thin film transistor (TFT)) as on-off element, according to the direction of polarized light of the image signal modulation that is provided from the polarized light light beam of light incident side polarization plate 452 ejaculations.

Cross dichroic prism 453 is the optical elements with and formation coloured image synthetic by the optical image after every kind of color of light modulation penetrating from emitting side polarization plate 454.This cross dichroic prism 453 is the roughly square shape that 4 right-angle prisms of fitting form in the plane apparent time, is formed with the dielectric multilayer film at the interface of each right-angle prism of fitting.Roughly side's dielectric multilayer film of X word shape is used for reflection red light, the opposing party's dielectric multilayer film is used for reflect blue light, red light and blue light align by these dielectric multilayer film warpages and with the direct of travel of green light, thus the light of synthetic three kinds of colors.

Used for optical part casing 46 has the U word shape in the plane apparent time as shown in Figure 9, at inner setting the lighting optical axis A of regulation is arranged, and above-mentioned each optical system 41～45 is configured in assigned position with respect to lighting optical axis A.This used for optical part casing 46 has member storage member 461 and cap-like structure 462 as Fig. 7 or shown in Figure 8.

Member storage member 461 utilizes light supply apparatus incorporating section 4611 and member storage portion main body 4612 to constitute as shown in Figure 8.

Light supply apparatus incorporating section 4611 as shown in Figure 8, the U word shape one that is positioned at used for optical part casing 46 is distolateral, and form in-Y direction side (lower side) and have the container-like of peristome 4611A, and constitute can be by peristome 4611A at internal freedom loading and unloading light supply apparatus 41.

In this light supply apparatus incorporating section 4611, in each side that X-direction is intersected the side of the outside (inboard and) towards the U word shape of used for optical part casing 46, as shown in Figure 8, be formed with peristome 4611B (peristome of the side that is formed at U word shape inboard only is shown) in Fig. 8.By these peristomes 4611B, can make air at light supply apparatus incorporating section 4611 internal circulations, can cool off the light supply apparatus 41 that is configured in inside.

Member storage portion main body 4612 forms in+Y direction side (upper side) has the container-like of peristome (omitting diagram), by described peristome, from distolateral each optical system 42,43 of configuration of sequentially taking in that is connected with light supply apparatus incorporating section 4611, disposing optical devices 45 with described one distolateral another distolateral taking in for opposition side.

In this member storage portion main body 4612 ,-the Y direction end face, as shown in Figure 8, be formed with peristome 4612R, 4612G, 4612B respectively in the position corresponding with the allocation position of each liquid crystal panel 451R that constitutes optical devices 45,451G, 451B.

And, in member storage portion main body 4612 ,-the Y direction end face, as shown in Figure 8, be formed with peristome 4612P in the position corresponding with the allocation position of polarized light conversion element 423.

The effect of these each peristomes 4612R, 4612G, 4612B, 4612P performance inflow entrance passes air among the space Ar2 (Fig. 9) of allocation position of the space Ar1 (Fig. 9) of allocation position of optical devices 45 of used for optical part casing 46 inside and polarized light conversion element 423.

Cap-like structure 462 is the member of the opening portion of plug members incorporating section main body 4612+Y direction side as shown in Figure 7, has the roughly the same flat shape of flat shape with member storage portion main body 4612.

On this cap-like structure 462, as shown in Figure 7, the allocation position of corresponding optical devices 45 be formed with the plane cover optical devices 45 "

" shape breach 4621.

And on cap-like structure 462, as shown in Figure 7, the allocation position of corresponding polarized light conversion element 423 is formed with peristome 4622.

The effect of these breach 4621 and peristome 4622 performance flow exports will be discharged to used for optical part casing 46 outsides by the air of above-mentioned each peristome 4612R, 4612G, 4612B, 4612P inflow used for optical part casing 46 volume inside Ar1, Ar2.

In addition, though omitted concrete diagram, but in used for optical part casing 46 inside, space Ar1 is by the opticses such as rib (rib), light incident side polarization plate 452 and field lens 455 that are formed at member storage portion main body 4612, constitutes in the mode that is not communicated with adjacent other spaces.And equally in used for optical part casing 46 inside, space Ar2 is made of in the mode that is not communicated with adjacent other spaces opticses such as the rib that is formed at member storage portion main body 4612, the 2nd lens arra 422 and overlapping lens 425 etc.

[structure of 2-2. power supply unit]

Power supply unit 5 provides electric power to each member of formation of the apparatus main body that constitutes projector 1.This power supply unit 5 is configured in the outer vanning body 2-extend towards front face side from rear side the side of X-direction side as shown in Figure 8.Though this power supply unit 5 has omitted concrete diagram,, have: power module will offer described each member of formation by the electric power that feed cable provides from the outside; The lamp driver module makes illuminator 411 bright lamps according to the electric power that provides from described power module.These power modules and lamp driver module such as Fig. 7 or shown in Figure 8 are covered by the metallicity shield members such as aluminium 51 of both ends open around it.And, constitute by this shield member 51 and will be directed to front face side, and make the electromagnetic noise that produces at described power module, described lamp driver module etc. not to external leakage from the rear side leaked-in air.

[structure of the air-cooled unit of 2-3. sealing circulation]

Figure 10～Figure 14 is the figure of the structure of the air-cooled unit 7 of expression sealing circulation.Specifically, Figure 10 is the state of the Peltier heat radiation wind exhaust unit 81 that constitutes box house cooling device 8 is unloaded in expression from state shown in Figure 4 figure.Figure 11 is the state of high heat conduction air channel portion 742 is unloaded in expression from state shown in Figure 10 figure.Figure 12 is the state of cover member 7322 is unloaded in expression from state shown in Figure 6 figure.Figure 13 is the state of lower air duct main body 732 is unloaded in expression from state shown in Figure 12 figure.Figure 14 is the state of circulating fan 72 is unloaded in expression from state shown in Figure 13 figure.

The air-cooled unit 7 of sealing circulation constitutes the hermetically-sealed construction that the present invention relates to used for optical part casing 46, make the air circulation in the ring-type circulation of air path of the space Ar1, the Ar2 that comprise in the used for optical part casing 46, cooling is configured in optical devices 45 and the polarized light conversion element 423 among space Ar1, the Ar2.Sealing circulates air-cooled unit 7 as Figure 10～shown in Figure 14, has cooling device 71, circulating fan 72 (Figure 12, Figure 13), stream leading portion crosswind road member 73 (Figure 12～Figure 14) and stream rear section side air channel member 74 (Figure 10, Figure 11).

In addition, describe from upstream side order along the circulation of air path below with respect to space Ar1, Ar2.And,, describe simultaneously with stream leading portion crosswind road member 73 about the concrete structure of circulating fan 72.

[structure of 2-3-1. cooling device]

Figure 15 is the stereographic map of the structure of expression cooling device 71.Specifically, Figure 15 is from+stereographic map when the Z-direction side is watched cooling device 71.

Cooling device 71 in projecting lens 3+X-direction side disposed adjacent, is absorbed in the heat of the air of advancing along the road in the circulation of air path of described hermetically-sealed construction inside, and rejects heat to the device of described hermetically-sealed construction outside as Figure 10～shown in Figure 14.This cooling device 71 has Peltier unit 711, heat absorbing side air channel 712, heat radiation side air channel 713 and cooling fan 714 as shown in figure 15.

Figure 16～Figure 18 is the figure of the structure of expression Peltier unit 711.Specifically, Figure 16 is the exploded perspective view the from+Peltier unit 711 of X-direction side (leaving a side of projecting lens 3) when watching.Figure 17 is the exploded perspective view the from-Peltier unit 711 of X-direction side (near a side of projecting lens 3) when watching.The sectional view of Figure 18 when Peltier unit 711+Z-direction is watched.

Peltier unit 711 is as Figure 16～shown in Figure 180, stacks gradually from projecting lens 3 sides and disposes heat absorbing side thermal conductive member 7111, ladder module 7112, suppresses member 7114 and heat radiation side thermal conductive member 7115 as Peltier element 7113, the heat conduction of thermoelectric conversion element.

Though Peltier element 7113 has omitted concrete diagram, have that a plurality of to utilize sheet metal to engage the joints that p N-type semiconductor N and n N-type semiconductor N constitute right, these a plurality of joints are in series being electrically connected.

In Peltier element 7113 with this structure, under the control of control basal plate 6, after applying the voltage of regulation, as Figure 16～shown in Figure 180, one side surface of Peltier element 7113 becomes the heat-absorbent surface 7113A that absorbs heat, and the opposing party surface becomes the radiating surface 7113B of release heat.In addition, in the present embodiment, Peltier element 7113 constitutes at the polarity chron of the voltage of the described regulation of change, when promptly changing sense of current, can carry out the switching of heat-absorbent surface 7113A and radiating surface 7113B.

Heat absorbing side thermal conductive member 7111 utilizes high heat conducting material (with reference to following table 1) to constitute, and is connected in the mode that can transmit heat with the heat-absorbent surface 7113A of Peltier element 7113 by ladder module 7112.This heat absorbing side thermal conductive member 7111 is as Figure 16～shown in Figure 180, so-called heating radiator by the plate body 7111A with rectangular shape and a plurality of cooling fin component 7111B constitutes, cooling fin component 7111B from plate body 7111A-the X-direction end face (with the joint face of ladder module 7112 be the end face of opposition side) outstanding and extend in Y direction (above-below direction).

Ladder module 7112 utilizes high heat conducting material (with reference to following table 1) to constitute, and gets involved between the heat-absorbent surface 7113A of the plate body 7111A that is arranged on heat absorbing side thermal conductive member 7111 and Peltier element 7113.This ladder module 7112 is as Figure 16～shown in Figure 180, have the module bodies 7112A of plate body shape and the 7112B of the portion of heaving of plate body shape, heave the 7112B of portion from module bodies 7112A+X-direction end face (end faces of Peltier element 7113 sides) heaves, and has the flat shape roughly the same with the flat shape of Peltier element 7113.So ladder module 7112 makes module bodies 7112A be connected in the mode that can transmit heat with heat absorbing side thermal conductive member 7111, make and heave the 7112B of portion and be connected in the mode that can transmit heat with the heat-absorbent surface 7113A of Peltier element 7113.

In the present embodiment, the gauge of ladder module 7112 (with the gauge of module bodies 7112A and heave the gauge of the gauge addition of the 7112B of portion) is set to more than or equal to 15mm smaller or equal to 30mm.

Heat conduction suppresses member 7114 and utilizes low thermal conductivity material (with reference to following table 1) to constitute, and is ladder module 7112 and Peltier element 7113 are remained on member between heat absorbing side thermal conductive member 7111 and the heat radiation side thermal conductive member 7115.

Suppress on member 7114 in this heat conduction,, be formed with recess 7114A to+X-direction side (cooling fan 714 sides) depression and module bodies 7112A that can chimeric ladder module 7112 as Figure 16～shown in Figure 180.The height dimension of this recess 7114A is set to the gauge of module bodies 7112A roughly the same as shown in figure 18.

And, on heat conduction suppresses member 7114,,, be formed with the peristome 7114B of the 7112B of the portion of heaving that can chimeric ladder module 7112 as Figure 16～shown in Figure 180 at the bottom surface portions of recess 7114A.

In addition, be formed with maintaining part 7114C on heat conduction suppresses member 7114, it has from peristome 7114B peripheral part to the+outstanding shaped as frame shape of X-direction side (cooling fan 714 sides), keeps the peripheral edge portion of Peltier element 7113 at frame shape inside part.In this maintaining part 7114C, its outstanding size as shown in figure 18, be set to the size of the gauge addition of the gauge that will heave the 7112B of portion and Peltier element 7113 roughly the samely or littler than it, two face 7113A, 7113B of Peltier element 7113 reliably contact with the plate body 7115A of heat radiation side thermal conductive member 7115 and the 7112B of the portion of heaving of ladder module 7112.

According to above-described structure, under the state of having assembled Peltier unit 711, as shown in figure 18, heat conduction suppresses member 7114 and is configured to the outer rim that covers ladder module 7112 and Peltier element 7113.

Heat radiation side thermal conductive member 7115 utilizes high heat conducting material (with reference to following table 1) to constitute, and is connected in the mode that can transmit heat with the radiating surface 7113B of Peltier element 7113.This heat radiation side thermal conductive member 7115 is as Figure 16～shown in Figure 180, and is identical with heat absorbing side thermal conductive member 7111, utilizes the heating radiator with plate body 7115A and a plurality of cooling fin component 7115B to constitute.Herein, a plurality of cooling fin component 7115B such as Figure 16～shown in Figure 180, with the bearing of trend of a plurality of cooling fin component 7111B of heat absorbing side thermal conductive member 7111 roughly the direction of quadrature (Z-direction) extend to form.

Heat absorbing side air channel 712 utilizes low thermal conductivity material (with reference to following table 1) to constitute, and as shown in figure 15, has a plurality of cooling fin component 7111B of surrounding heat absorbing side thermal conductive member 7111 and extends roughly in Y direction

The shape section shape.And heat absorbing side air channel 712 constitutes and makes it

The shape fore-end can connect the plate body 7111A of heat absorbing side thermal conductive member 7111, by being connected with plate body 7111A, can

The shape inside part disposes a plurality of cooling fin component 7111B.And, as shown in figure 15, utilize heat absorbing side air channel 712 to form the stream C1 that air can be circulated along the bearing of trend of a plurality of cooling fin component 7111B.This stream C1 constitutes the part in the circulation of air path of described hermetically-sealed construction inside.Promptly, the heat of the air of in stream C1, advancing along the road, in the heat transferred path of the heat-absorbent surface 7113A of a plurality of cooling fin component 7111B～plate body 7111A～ladder module 7112～Peltier element 7113, advance, and absorbed by the heat-absorbent surface 7113A of Peltier element 7113 along the road.

Heat radiation side air channel 713 utilizes high heat conducting material (with reference to following table 1) to constitute, as shown in figure 15, intervention is arranged between cooling fan 714 and the Peltier unit 711, will be directed to prescribed direction from the air that passes through Peltier unit 711 that cooling fan 714 is carried.More specifically, though a part has been omitted in heat radiation side air channel 713 in Figure 15, have surround heat radiation side thermal conductive member 7115+the Z-direction side ,+the Y direction side and+X-direction side three parts's shape.And, on heat radiation side air channel 713, as shown in figure 15, be formed with breach 7131 in+X-direction side one side (one side relative) with cooling fin component 7115B.And,, as shown in figure 15, be formed with the fan that is used for cooling fan 714 is arranged on outer vanning body 2 inside the connecting portion 7132 that member 714A is connected be set in the peripheral part of breach 7131.Heat radiation side air channel 713 will be directed to-the Z-direction side from the air that cooling fan 714 blows to cooling fin component 7115B as shown in figure 15.

Cooling fan 714 as shown in figure 15, utilize aerofoil fan to constitute, be configured to relative with air intake opening 224 with the cooling device that is formed at outer vanning body 2, under the control of control basal plate 6, drive, thereby suck outer vanning body 2 air outside by cooling device with air intake opening 224, and spray air to a plurality of cooling fin component 7115B of heat radiation side thermal conductive member 7115.That is, in the heat transferred path of radiating surface 7113B～plate body 7115A～a plurality of cooling fin component 7115B of Peltier element 7113, advance and pass to the heat of a plurality of cooling fin component 7115B, be cooled by cooling fan 714 along the road.

[structure of 2-3-2. stream leading portion crosswind road member]

Stream leading portion crosswind road member 73 utilizes low thermal conductivity material (the following table 1 of reference) to constitute, and is to guide to circulating fan 72 by the air of cooling device 71 along stream C1, and the member that will guide to space Ar1, Ar2 from the air of circulating fan 72 ejections.This stream leading portion crosswind road member 73 has foundation plate 731 and air channel main body 732 (Fig. 6, Figure 12) as Fig. 6, Figure 12～shown in Figure 14.

Foundation plate 731 is as Fig. 6, Figure 12～shown in Figure 14, the member storage portion main body 4612 of used for optical part casing 46-the Y direction end face separates the interval of regulation, and (for example about 5～10mm) install, and support circulating fan 72 and air channel main body 732.This foundation plate 731 is as Figure 13 or shown in Figure 14, and the plane apparent time roughly is the T word shape.More specifically, foundation plate 731 extends along Z-direction up to the used for optical part casing 46 inner positions corresponding with the allocation position of optical devices 45 from the lower side of projecting lens 3, and-the Z-direction end along the X-direction extension up to the position corresponding with the allocation position of polarized light conversion element 423 and with the opposition side of the allocation position of polarized light conversion element 423.

And, in foundation plate 731, being positioned at part such as Figure 13 or shown in Figure 14 of the lower side of projecting lens 3, performance is used to install the effect of the 1st installation portion 7311 of circulating fan 72.And, in foundation plate 731, the part of extending from the position edge+X-direction corresponding with the allocation position of optical devices 45, as Figure 13 or shown in Figure 14, performance is used to install the effect of the 2nd installation portion 7312 of circulating fan 72.

At this, circulating fan 72 is to make the ring-type circulation of air path round-robin fan of air along described hermetically-sealed construction inside, as shown in figure 13, utilizes the 1st Sirocco fan 721 and the 2nd Sirocco fan 722 to constitute.The 1st Sirocco fan 721 is installed on the 1st installation portion 7311 of foundation plate 731 as shown in figure 13, and makes air intake opening 7211 towards-Y direction side, makes ejiction opening 7212 towards-Z-direction side.The 2nd Sirocco fan 722 as shown in figure 13, be installed on the 2nd installation portion 7312 of foundation plate 731, and become and make air intake opening 7221 towards-Y direction side, make ejiction opening 7222 be in towards-Z-direction side and relatively the XY plane towards the state of-oblique predetermined angular of X-direction inclination.

And, in foundation plate 731, in the position corresponding,, be formed with respectively and each peristome 4612R, the 4612G, the 4612B corresponding opening 7313R of portion, 7313G, the 7313B that are formed at used for optical part casing 46 as Figure 13 or shown in Figure 14 with the allocation position of optical devices 45.

In addition, in foundation plate 731,,, be formed with and the peristome 4612P corresponding opening 7314P of portion that is formed at used for optical part casing 46 as Figure 13 or shown in Figure 14 in the position corresponding with the allocation position of polarized light conversion element 423.

Air channel main body 732 is installed on foundation plate 731-Y direction end face, thereby will guide to circulating fan 72 by the air of cooling device 71 along stream C1, and will guide to space Ar1, Ar2 from the air of circulating fan 72 ejections.This air channel main body 732 has matrix 7321 and cover member 7322 (Fig. 6) as Fig. 6 or shown in Figure 12.

Matrix 7321 has the flat shape roughly the same with the flat shape of foundation plate 731 as shown in figure 12, is the 1st 7321A of air channel portion and the integrally formed parts of the 2nd 7321B of air channel portion.

The 1st 7321A of air channel portion is used for and will guides to circulating fan 72 by the air of cooling device 71 along stream C1.The 1st 7321A of air channel portion as shown in figure 12, under the state of having assembled the air-cooled unit 7 of sealing circulation, have plane earth and surround the heat absorbing side air channel 712 of cooling device 71 and the 7321A1 of retaining wall portion of circulating fan 72, and form in-Y direction side and have the container-like of peristome 7321A2.

In the 1st 7321A of air channel portion, as shown in figure 12, be formed with the peristome 7321A3 that is communicated with stream C1 in the position corresponding with the heat absorbing side air channel 712 of cooling device 71.

And in the 1st 7321A of air channel portion, as shown in figure 12, the position corresponding with each air intake opening 7211,7221 of each Sirocco fan 721,722 that constitutes circulating fan 72 is formed with peristome 7321A4,7321A5 respectively.

In addition, in the 1st 7321A of air channel portion, between each peristome 7321A4,7321A5, as shown in figure 12, be formed with the rectification rib 7321A6 that extends towards peristome 7321A3 from the 7321A1 of retaining wall portion.

In addition, in the 1st 7321A of air channel portion,, as shown in figure 12, be formed with the heat radiation wind restrictions 7321A7 of the plane apparent time rectangular shaped of extending from the 7321A1 of retaining wall portion edge+X-direction in the position corresponding with the heat radiation side air channel 713 of cooling device 71.That is, under the state of having assembled the air-cooled unit 7 of sealing circulation, heat radiation wind restrictions 7321A7 is connected with the heat radiation side air channel 713 of cooling device 71.And, utilizing heat radiation wind restrictions 7321A7 and heat radiation side air channel 713, the air that will blow to cooling fin component 7115B from cooling fan 714 is to-Z-direction guiding.

And, in the 1st 7321A of air channel portion, peristome 7321A4 peripheral part as shown in figure 12, performance is used to install the effect of the 1st installation portion 7321A8 of the 1st Sirocco fan 721 that constitutes circulating fan 72.That is, the 1st Sirocco fan 721 is being gripped by the 1st installation portion 7311 of foundation plate 731 and the 1st installation portion 7321A8 of air channel main body 732.

In addition, in the 1st 7321A of air channel portion, peristome 7321A5 peripheral part as shown in figure 12, performance is used to install the effect of the 2nd installation portion 7321A9 of the 2nd Sirocco fan 722 that constitutes circulating fan 72.That is, the 2nd Sirocco fan 722 is being gripped by the 2nd installation portion 7312 of foundation plate 731 and the 2nd installation portion 7321A9 of air channel main body 732.

Cover member 7322 is installed on the 7321A1 of retaining wall portion of the 1st 7321A of air channel portion as shown in Figure 6, is the member of the 7321A2 of occlusion of openings portion.

And, by mounting cup member 7322 on the 1st 7321A of air channel portion, as shown in figure 12, the air of advancing along stream C1 is directed between the 1st 7321A of air channel portion and the cover member 7322 by peristome 7321A3, forms described air to the stream C2 of peristome 7321A4 (the 1st Sirocco fan 721) guiding with the stream C3 of described air to peristome 7321A5 (the 2nd Sirocco fan 722) guiding by rectification rib 7321A6.These streams C2, C3 constitute the part in the circulation of air path of described hermetically-sealed construction inside.

The 2nd 7321B of air channel portion be used for along each stream C2, C3 advances and by the air of each Sirocco fan 721,722 suction/ejections, guide to used for optical part casing 46 volume inside Ar1, Ar2.The 2nd 7321B of air channel portion such as Fig. 6 or shown in Figure 12, have from the position edge-Z-direction corresponding and extend with the allocation position of optical devices 45, and the plane apparent time that edge-X-direction is extended up to the position corresponding with the allocation position of polarized light conversion element 423 roughly is the shape of L word, and forms+Y direction side opening container-like.

Though in the 2nd 7321B of air channel portion, omitted concrete diagram, be formed with breach that is connected with the ejiction opening 7212 of the 1st Sirocco fan 721 and the breach that is connected with the ejiction opening 7222 of the 2nd Sirocco fan 722 at container-like sidewall sections.

And,, be formed with the rectification rib that the air from the 1st Sirocco fan 721 and 722 ejections of the 2nd Sirocco fan is guided to assigned position though on the 2nd 7321B of air channel portion, omitted concrete diagram.

And, by air channel main body 732 is installed on the foundation plate 731, as shown in figure 13, to advance and be directed between the 2nd 7321B of air channel portion and the foundation plate 731 along stream C2, and form each peristome 7313R, 7313B and each peristome 4612R of used for optical part casing 46, the stream C4 that 4612B be directed to space Ar1 of described air by foundation plate 731 by described rectification rib by the air of the 1st Sirocco fan 721 suction/ejections.And, as shown in figure 13, to advance and be directed between the 2nd 7321B of air channel portion and the foundation plate 731 along stream C3 by the air of the 2nd Sirocco fan 722 suction/ejections, and form peristome 7313G and the peristome 4612G of the used for optical part casing 46 stream C5 that be directed to space Ar1 of described air by foundation plate 731, and with peristome 7314P and the peristome 4612P of the used for optical part casing 46 stream C6 that be directed to space Ar2 of described air by foundation plate 731 by described rectification rib.These streams C4～C6 constitutes the part in the circulation of air path of described hermetically-sealed construction inside.

[structure of 2-3-3. stream rear section side air channel member]

Stream rear section side air channel member 74 is to flow out to the member that space Ar1, Ar2 air outside are directed to the heat absorbing side air channel 712 (stream C1) of cooling device 71 from space Ar1, Ar2 inside.This stream rear section side air channel member 74 has low heat conduction air channel portion 741 and 742 (Figure 10) of high heat conduction air channel portion as Figure 10 or shown in Figure 11.

Low heat conduction air channel portion 741 utilizes low thermal conductivity material (with reference to following table 1) to constitute, as shown in figure 10, have plane earth surround to constitute cooling device 71 heat absorbing side air channel 712+opening portion of Y direction side and constitute the retaining wall portion 7411 of the member storage portion main body 4612 of used for optical part casing 46, form the plane apparent time that has a peristome 7412 in+Y direction side and roughly be the container-like of L word shape.And, this low heat conduction air channel portion 741 as shown in figure 11, heat absorbing side air channel 712+Y direction end face and cap-like structure 462+the Y direction end face separates the interval of regulation, and (for example about 5～10mm) install.

On stream rear section side air channel member 74, be provided with the hole that is used to make the FPC cable 456 that connects liquid crystal panel 451 and control basal plate 6 to pass through.And the gap of described hole and FPC cable 456 is utilized sealings such as rubber, sponge, not destroy the sealing of member 74 inside, stream rear section side air channel.

In this low heat conduction air channel portion 741, the position in corresponding heat absorbing side air channel 712 is formed with the peristome 7413 that is communicated with stream C1 as shown in figure 11.

And in low heat conduction air channel portion 741, the position at the breach 4621 of corresponding cap-like structure 462 is formed with the peristome 7414 that is communicated with space Ar1 by breach 4621 as shown in figure 11.

In addition, in low heat conduction air channel portion 741, the position at the breach 4622 of corresponding cap-like structure 462 is formed with the peristome 7415 that is communicated with space Ar2 by breach 4622 as shown in figure 11.

In addition, in low heat conduction air channel portion 741, as shown in figure 11, be formed with the rectification rib 7416 that extends and isolate each peristome 7414,7415 from retaining wall portion 7411 towards peristome 7412.

High heat conduction air channel portion 742 utilizes high heat conducting material (with reference to following table 1) to constitute, as shown in figure 10, is installed in the retaining wall portion 7411 of low heat conduction air channel portion 741, and be the member of occlusion of openings portion 7412.

And, by high heat conduction air channel portion 742 is installed in low heat conduction air channel portion 741, be formed with stream C7 and stream C8 as shown in figure 11, stream C7 is used for importing member 74 inside, stream rear section side air channel with flow out to space Ar1 air outside from Ar1 inside, space by breach 4621 and peristome 7414, and described air is directed to heat absorbing side air channel 712 (stream C1) by peristome 7413, stream C8 is used for importing member 74 inside, stream rear section side air channel with flow out to space Ar2 air outside from Ar2 inside, space by peristome 4622 and peristome 7415, and by peristome 7413 described air is directed to heat absorbing side air channel 712 (stream C1).These streams C7, C8 constitute the part in the circulation of air path of described hermetically-sealed construction inside.

That is, utilize above-mentioned stream C1～C8 and space Ar1, Ar2 to constitute the ring-type circulation of air path of described hermetically-sealed construction inside.And, utilize circulating fan 72 to make air logical, thereby optical devices 45 (liquid crystal panel 451, light incident side polarization plate 452, emitting side polarization plate 454 etc.) and polarized light conversion element 423 in space Ar1, the Ar2 are cooled along the ring-type circulation of air path flow of stream C1～stream C2, stream C3～stream C4, C5, C6～space Ar1, Ar2～stream C7, C8～stream C1.

In addition, though omitted concrete diagram, used for optical part casing 46 and the air-cooled unit 7 of sealing circulation constitute described circulation of air path and outside disconnected hermetically-sealed construction for example by rubber-like containment member etc. is set between each member.

Above-mentioned high heat conducting material and low thermal conductivity material can list the material shown in the following table 1.As shown in table 1 at this, about high heat conducting material, preferred pyroconductivity is more than or equal to the material of 42W/ (mK), and about low thermal conductivity material, preferred pyroconductivity is smaller or equal to the material of 0.9W/ (mK).

Table 1

[structure of 2-4. box house cooling device]

The member of formation (control basal plate 6, stream rear section side air channel member 74, light supply apparatus 41, power supply unit 5 etc.) of the described hermetically-sealed construction of box house cooling device 8 coolings outside.This box house cooling device 8 has Peltier heat radiation wind exhaust unit 81 (Fig. 4, Fig. 5), light source cooling fan 82 (Fig. 6), power supply cooling fan 83 and extraction fan 84 as Fig. 4～shown in Figure 6.

Peltier heat radiation wind exhaust unit 81 is used to make the air that blows to the cooling fin component 7115B in heat radiation side air channel 713 from cooling fan 714, circulation between control basal plate 6 and stream rear section side air channel member 74.This Peltier heat radiation wind exhaust unit 81 has outer side air channel member 811 and ventilation guide portion 812 as Fig. 4 or shown in Figure 5.

Figure 19 is the stereographic map of expression outer side air channel member 811.

Outer side air channel member 811 forms as shown in figure 19 air is imported inner introducing port 8111 and inner air is discharged to roughly quadrature of outside export mouth 8112, make by introducing port 8111 import inner air to+Y direction warpage and circulation, again towards export mouth 8112 warpages and circulation.And though this outer side air channel member 811 has omitted concrete diagram, introducing port 8111 is provided as with the rear side end in heat radiation side air channel 713 and the rear side end of heat radiation wind restrictions 7321A7 and is connected.And this outer side air channel member 811 is as Fig. 4 or shown in Figure 5, be provided as make export mouth 8112 be arranged in control basal plate 6 (omitting diagram) at Fig. 4+X-direction end and stream rear section side air channel member 74+the X-direction end between.Promptly, outer side air channel member 811 will blow to cooling fin component 7115B and be directed air to-Z-direction by heat radiation wind restrictions 7321A7 and heat radiation side air channel 713 from cooling fan 714, import innerly by introducing port 8111, be discharged between control basal plate 6 and the stream rear section side air channel member 74 towards-X-direction side from+X-direction side by export mouth 8112 again.

Ventilation guide portion 812 is used to make the air of discharging from outer side air channel member 811, between control basal plate 6 and stream rear section side air channel member 74 along with the relative part circulation of space Ar1, Ar2 in the stream rear section side air channel member 74.This ventilation guide portion 812 has the 1st guide portion 8121 and the 2nd guide portion 8122 as Fig. 4 or shown in Figure 5.

The 1st guide portion 8121 is as Fig. 4 or shown in Figure 5, utilize tabular component to constitute, so that the export mouth 8112 of a distolateral connection outer side air channel member 811-the Z-direction end, make another distolateral along the high heat conduction air channel portion 742 that constitutes stream rear section side air channel member 74-the Z-direction ora terminalis and-the X-direction ora terminalis extends near the mode the light supply apparatus incorporating section 4611, erect to be arranged in the high heat conduction air channel portion 742.

The 2nd guide portion 8122 is as Fig. 4 or shown in Figure 5, utilize tabular component to constitute, so that the export mouth 8112 of a distolateral connection outer side air channel member 811+the Z-direction end, another distolateral edge-X-direction is extended and extend near the light supply apparatus incorporating section 4611 mode, erect and be arranged in the high heat conduction air channel portion 742 along the inboard ora terminalis of L word shape of the high heat conduction air channel portion 742 that constitutes stream rear section side air channel member 74.

And, across ventilation guide portion 812 stream rear section side air channel member 74+the Y direction side is provided with control basal plate 6, thereby as Fig. 4 or shown in Figure 5, formation makes the air of discharging from the export mouth 8112 of outer side air channel member 811, from the stream C11 of the part relative with space Ar1 towards the part circulation relative with space Ar2.

Light source cooling fan 82 as shown in Figure 6, utilize Sirocco fan to constitute, so that air intake opening 821 is towards-Y direction side, make the mode of ejiction opening 822 towards+Z-direction side, be installed in member storage portion main body 4612-be connected with light supply apparatus incorporating section 4611 in the Y direction end face one distolateral.And light source cooling fan 82 is by driving under the control of control basal plate 6, and the light source by being formed at lower house 22 sucks the cooling air of outer vanning body 2 outsides with air intake opening 223, and to+the Z-direction ejection.From the air of light source cooling fan 82 ejection as shown in Figure 6, the air introduction part 4131 of the lamp housing 413 by being formed at light supply apparatus 41, be imported into lamp housing 413 inside along stream C12 with lamp housing 413 inside and outside connections, thus cools light source lamp 411 and catoptron 412.

Power supply cooling fan 83 is as Fig. 4～shown in Figure 6, utilize aerofoil fan to constitute, so that air intake opening 831, makes the mode of ejiction opening 832 towards+Z-direction side towards-Z-direction side, be set at outer vanning body 2 inside-the Z-direction side and-corner part of X-direction side.And power supply cooling fan 83 is by driving under the control of control basal plate 6, and as Fig. 4 or shown in Figure 5, the power supply by being formed at outer vanning body 2 sucks the cooling air of outer vanning body 2 outsides with air intake opening 225, and to+the Z-direction ejection.From the air of power supply cooling fan 83 ejection such as Fig. 4～shown in Figure 6, by the shield member 51 of power supply unit 5 and along stream C13 with shield member 51 inside and outside connections, by from shield member 51-the Z-direction side opening partly imports shield member 51 inside, cools off described power module and described lamp driver module.

Extraction fan 84 is as Fig. 4～shown in Figure 6, utilize aerofoil fan to constitute, so that air intake opening 841 (Fig. 6) is towards-Z-direction side, and relatively the XY plane is towards the state of+oblique predetermined angular of X-direction inclination, be set at outer vanning body 2 inside+corner part of Z-direction side and being positioned at-X-direction side.This extraction fan 84 is by driving near the air the suction extraction fan 84 under the control of control basal plate 6.

For example, extraction fan 84 is as Fig. 4 or shown in Figure 5, sucks by Peltier heat radiation wind exhaust unit 81 and is passed near the light supply apparatus incorporating section 4611 air along stream C11.

And for example, extraction fan 84 is as Fig. 5 or shown in Figure 6, by be formed at light supply apparatus incorporating section 4611-peristome (omitting diagram) of X-direction end face, suck the air of 4611 inside, light supply apparatus incorporating section.Promptly, by light source cooling fan 82 along stream C12 be imported into lamp housing 413 inner and by heated air such as illuminator 411, catoptron 412 and by be formed at light supply apparatus incorporating section 4611+the peristome 4611B of X-direction end face is passed to the air of 4611 inside, light supply apparatus incorporating section, is deflated fan 84 and sucks.

In addition, for example, extraction fan 84 is as Fig. 4～shown in Figure 6, by shield member 51+opening portion of Z-direction side sucks the air of shield member 51 inside.That is, be imported into shield member 51 inside, also pass through described power module and the heated air of described lamp driver module along stream C13, be deflated fan 84 and suck by power supply cooling fan 83.

And from the air of extraction fan 84 ejection, the exhausr port 233 by outer vanning body 2 by rectification, is discharged to outer vanning body 2 outsides via vent window 234.

[structure of 2-5. control basal plate]

Central processing unit) control basal plate 6 constitutes and CPU is installed (Central Processing Unit: the circuit substrate of circuit component such as is configured in the upper side of optical unit 4 across stream rear section side air channel member 74 and ventilation guide portion 812 as shown in Figure 3.And, control basal plate 6 drive controlling optical units 4 (illuminator 411, liquid crystal panel 451), power supply unit 5, sealing circulation air-cooled unit 7 (circulating fan 72, Peltier element 7113, cooling fan 714), box house cooling device 8 (light source cooling fan 82, power supply cooling fan 83, extraction fan 84) etc.The control structure of the Peltier element 7113 in the control structure of control basal plate 6 only is described in addition.

Figure 20 is a block scheme of schematically representing the control structure of Peltier element 7113.

In control basal plate 6, as the Peltier control part 61 of the control device of drive controlling Peltier element 7113 as shown in figure 20, steering order to the drive division 62 output regulations that Peltier element 7113 applied assigned voltage, the driving condition of control Peltier element 7113 has rectangle control part 611, polarity switch control portion 612 and storer 613.

When (when the driving of Peltier element 7113 begins) and driving stopped when rectangle control part 611 started at projector 1 (when the driving of Peltier element 7113 stops),, implement the rectangle control of Peltier element 7113 to the steering order of drive division 62 output regulations.More specifically, to the steering order of drive division 62 output regulations, control by the rectangle of implementing to make the magnitude of voltage stage ground that imposes on Peltier element 7113 to be increased to common magnitude of voltage when projector 1 starting for rectangle control part 611.And rectangle control part 611 to the steering order of drive division 62 output regulations, implements to make the magnitude of voltage that imposes on Peltier element 7113 to control from the rectangle that common magnitude of voltage stage ground reduces when the driving of projector 1 stops.

Polarity switch control portion 612 is relatively by the detected temperatures of heat absorbing side temperature detecting part 63 (Figure 20) detection and the atmosphere temperature that detects by atmosphere temperature detecting part 64 (Figure 20), poor (detected temperatures is poor) of detected temperatures and atmosphere temperature more than or equal to when being stored in the design temperature difference of the design temperature difference information in the storer 613, steering order to drive division 62 output regulations, enforcement is used to switch the polarity switching controls of the polarity of the voltage that imposes on Peltier element 7113, described heat absorbing side temperature detecting part 63 utilizes the formations such as thermistor that are connected and detect the temperature of heat absorbing side thermal conductive member 7111 with control basal plate 6, and described atmosphere temperature detecting part 64 utilizes the formations such as thermistor of the atmosphere temperature that detects described hermetically-sealed construction outside.

Needed information (design temperature difference information etc.) etc. is handled in control program, execution when storer 613 storages are carried out processing by above-mentioned each control part 611,612.That is the storer 613 design temperature difference information storage part that is equivalent to the present invention relates to.

About design temperature difference information, refer to poor (design temperature is poor) relevant information of the atmosphere temperature of the described hermetically-sealed construction outside set with the design temperature of the heat absorbing side thermal conductive member 7111 that will be cooled to desired temperature with according to the environment for use of projector 1 as the optical devices 45, polarized light conversion element 423 etc. of cooling object.

In addition, storer 613 for example constitutes can be at the menu screen of the driving condition that is used for setting projector 1, waits by operating operation panel 212, telepilot and suitably changes above-mentioned design temperature difference information.

Heat absorbing side temperature detecting part 63 detects the temperature of heat absorbing side thermal conductive member 7111 that is connected with the heat-absorbent surface 7113A of Peltier element 7113 and transmits the heat of heat-absorbent surface 7113A.Heat absorbing side temperature detecting part 63 can transmit heat with heat absorbing side thermal conductive member 7111 across ladder module 7112 mode is connected with heat-absorbent surface 7113A, so can not directly detect the temperature of heat-absorbent surface 7113A.But, because the temperature of the temperature of heat absorbing side thermal conductive member 7111 and heat-absorbent surface 7113A is roughly the same, so can replace detecting the temperature of heat-absorbent surface 7113A by detecting the temperature of heat absorbing side thermal conductive member 7111.

[the 3. control method of Peltier element]

Below, the control method of above-mentioned 61 pairs of Peltier elements 7113 of Peltier control part is described.

Figure 21 is the process flow diagram of the control method of explanation Peltier element 7113.

At first, the Peltier control part 61 of control basal plate 6 is by by user's operating operation panel 212, not shown telepilot etc., implement the input operation of expression " starting projector 1 ", thus after input is from the power throughing signal of guidance panel 212, not shown telepilot sensor devices etc. (step S1), read the control program that is stored in the storer 613, according to the drive controlling of beginning Peltier element 7113 shown below.

Figure 22 is the figure of an example of the rectangle control of expression rectangle control part 611.In addition, Figure 22 the time as transverse axis, expression is to the atmosphere temperature T that applies magnitude of voltage V (epimere), hermetically-sealed construction outside of Peltier element 7113 _PThe detected temperatures T of (stage casing) and heat absorbing side temperature detecting part 63 _DThe state of (hypomere).

After step S1, if rectangle control part 611 input power throughing signals, then export the steering order of regulation to drive division 62, according to enforcement rectangle control shown in Figure 22 (step S2), make the voltage that applies increase magnitude of voltage up to becoming common magnitude of voltage V from 0V state phase ground at Peltier element 7113 _H

After step S2, Peltier control part 61 keeps Peltier element 7113 is applied common magnitude of voltage V to the steering order of drive division 62 output regulations _HCommon driving condition (step S3).

And, when Peltier control part 61 is implemented to drive usually at step S3, the detected temperatures T that identification detects by heat absorbing side temperature detecting part 63 _D, and the atmosphere temperature T that detects by atmosphere temperature detecting part 64 _P, calculate detected temperatures T all the time _DWith the atmosphere temperature T _PDetected temperatures poor.And Peltier control part 61 compares detected temperatures difference and poor based on the design temperature that is stored in the design temperature difference information in the storer 613 all the time, judges that whether the detected temperatures difference is more than or equal to design temperature poor (step S4).At this, when Peltier control part 61 is implemented to drive usually at step S3, whether poor more than or equal to design temperature by judging the detected temperatures difference, whether the relative atmosphere temperature of temperature (temperature of the heat-absorbent surface 7113A of Peltier element 7113) that detects heat absorbing side thermal conductive member 7111 is low more than or equal to necessary degree.

At step S4, when Peltier control part 61 is judged to be "No", that is, the temperature (temperature of the heat-absorbent surface 7113A of Peltier element 7113) of judging heat absorbing side thermal conductive member 7111 relatively the atmosphere temperature not low during more than or equal to necessary degree, return step S3, keep driving usually.

On the other hand, at step S4, when Peltier control part 61 is judged to be "Yes", promptly, the temperature (temperature of the heat-absorbent surface 7113A of Peltier element 7113) of judging heat absorbing side thermal conductive member 7111 relatively the atmosphere temperature low during more than or equal to necessary degree, continue to implement the polarity switching controls up to the detected temperatures difference less than design temperature poor (step S5).

Specifically, polarity switch control portion 612 is in the detected temperatures difference during more than or equal to the design temperature difference, to the steering order of drive division 62 output regulations, implements to be used to switch the polarity switching controls of the polarity of the voltage that imposes on Peltier element 7113.By this polarity switching controls, the heat-absorbent surface 7113A of Peltier element 7113 is switched to the radiating surface of release heat, and radiating surface 7113B is switched to the heat-absorbent surface that absorbs heat.That is, by implementing the polarity switching controls, it is low more than or equal to the temperature of the heat-absorbent surface 7113A of necessary degree to increase relative atmosphere temperature.

And, between above-mentioned step S1～S5, Peltier control part 61 is by user's operating operation panel 212, not shown telepilot etc., input operation according to expression " stopping the driving of projector 1 ", import behind the power disconnect signal of outputs such as guidance panel 212, telepilot sensor devices, the control of enforcement rectangle stops the driving of Peltier element 7113.

Specifically, if rectangle control part 611 input power disconnect signals, just to the steering order of drive division 62 output regulation,, make the voltage stage that applies ground at Peltier element 7113 reduce magnitude of voltage up to from common magnitude of voltage V according to enforcement rectangle control shown in Figure 22 _HState become the state that voltage is 0V that applies.

Has following effect in the above-described first embodiment.

According to present embodiment, in the used for optical part casing 46 volume inside Ar1, the Ar2 that constitute hermetically-sealed construction, take in configuration optical devices 45 and polarized light conversion element 423, so can prevent dust, oil smoke etc. attached on each optics 45,423, can stably guarantee from the image quality of the projected image of projector 1 projection.

And, constitute cooling device 71, circulating fan 72 and the used for optical part casing 46 of hermetically-sealed construction, circulation of air direction in the circulation of air path of hermetically-sealed construction inside is with the order setting of cooling device 71, circulating fan 72 and used for optical part casing 46.Thus, circulating fan 72 can suck at the heat absorbing side of cooling device 71 (the heat-absorbent surface 7113A of heat absorbing side thermal conductive member 7111, ladder module 7112, Peltier element 7113) cooled air, and towards being contained each optics 45,423 ejections that are configured among used for optical part casing 46 volume inside Ar1, the Ar2.That is, carry air to each optics 45,423 under the low-temperature condition that can be cooled, can cool off each optics 45,423 effectively in heat absorbing side by cooling device 71.

At this, circulating fan 72 utilizes two Sirocco fans 721,722 to constitute, so can fully guarantee to spray the wind speed of pressure and the air that is sprayed, can cool off each optics 45,423 effectively.

In addition, stream leading portion crosswind road member 73 utilizes pyroconductivity to constitute smaller or equal to the low thermal conductivity material of 0.9W/ (mK).Thus, by utilizing the fully low material of pyroconductivity to constitute stream leading portion crosswind road member 73, can prevent the heat of hermetically-sealed construction air outside and be located at the heat of the member of formation of hermetically-sealed construction outside, pass to the air of advancing along the circulation of air path of stream C2, C3～stream C4, C5, C6 towards used for optical part casing 46 from cooling device 71 by stream leading portion crosswind road member 73.Therefore, be fit to realize following effect, that is, carry air to each optics 45,423 under the low-temperature condition that can be cooled, can cool off each optics 45,423 effectively in heat absorbing side by cooling device 71.

At this, stream leading portion crosswind road member 73 (foundation plates 731) are taken at the member of used for optical part casing 46 and are separated predetermined distance (for example about 5～10mm) installations on the main body 4612, so can utilize the air layer (thermofin) between stream leading portion crosswind road member 73 and the used for optical part casing 46, prevent to pass to the heat of used for optical part casing 46 reliably, pass to the air of in the circulation of air path of stream C2, C3～stream C4, C5, C6, advancing along the road by stream leading portion crosswind road member 73 from light supply apparatus 41 opticses such as grade.

And then in addition, by adopting the above-mentioned structure that can effectively cool off each optics 45,423, not needing increases the revolution of circulating fan 72 more than or equal to necessary degree, and realizes the low noise effect of projector 1.And not needing increases the power consumption of Peltier element 7113 more than or equal to necessary degree, and realizes the energy-saving effect of projector 1.

And, stream rear section side air channel member 74 has the high heat conduction air channel portion 742 that the pyroconductivity utilized constitutes more than or equal to the fully high high heat conducting material of the pyroconductivity of 42W/ (mK) in the position of interfering with the breach 4621 of used for optical part casing 46 and peristome 4622 plane earths.Promptly, in stream rear section side air channel member 74, via taking in each optics 45,423 heated air that are configured among used for optical part casing 46 volume inside Ar1, the Ar2, breach 4621 by used for optical part casing 46 and peristome 4622, and each peristome 7414,7415 of low heat conduction air channel portion 741 part that can blow to are provided with high heat conduction air channel portion 742.Thus, can make the heat of the air of advancing along the road in the circulation of air path of stream C7, C8 in stream rear section side air channel member 74, promptly via taking in the heat that is configured in each optics 45, the 423 heated air among used for optical part casing 46 volume inside Ar1, the Ar2, reject heat to the hermetically-sealed construction outside by high heat conduction air channel portion 742.Therefore, the temperature of the air of advancing along the road can be set at fully low temperature in the circulation of air path of hermetically-sealed construction inside, can cool off each optics 45,423 more effectively.

At this, stream rear section side air channel member 74 utilizes high heat conduction air channel portion 742 and constitutes near low heat conduction air channel portion 741 these two parts that used for optical part casing 46 is provided with, and low heat conductivity air channel 741 utilizes pyroconductivity to constitute smaller or equal to the fully low low thermal conductivity material of the pyroconductivity of 0.9W/ (mK).Thus, can prevent to pass to the heat of used for optical part casing 46, pass to the air of advancing along the road in the circulation of air path of stream C7, C8 in stream rear section side air channel member 74 by low heat conduction air channel portion 741 from light supply apparatus 41 opticses such as grade.Therefore, by utilizing high heat conduction air channel portion 742 and low heat conduction air channel portion 741 these two parts to constitute stream rear section side air channel member 74, be fit to realize following effect, promptly, the temperature of the air of advancing along the road can be set at fully low temperature in the circulation of air path of hermetically-sealed construction inside, can cool off each optics 45,423 more effectively.

And, stream rear section side air channel member 74 (low heat conduction air channel portion 741) separates predetermined distance on the cap-like structure 462 of used for optical part casing 46 (for example about 5～10mm) install, so can utilize the air layer (thermofin) between stream rear section side air channel member 74 and the used for optical part casing 46, prevent to pass to the heat of used for optical part casing 46 reliably, pass to the air of in the circulation of air path of stream C2, C3～stream C4, C5, C6, advancing along the road by stream rear section side air channel member 74 from light supply apparatus 41 opticses such as grade.

And, in cooling device 71, heat-absorbent surface 7113A and radiating surface 7113B at Peltier element 7113 are equipped with heat absorbing side thermal conductive member 7111 and the heat radiation side thermal conductive member 7115 that can transmit heat, so can increase the surface area of heat absorbing side and the surface area of heat radiation side.And cooling device 71 has the cooling fan 714 to heat radiation side thermal conductive member 7115 ejection air.Therefore, in cooling device 71, the absorption of heat and the heat radiation of heat can be implemented well, the air of in the circulation of air path of hermetically-sealed construction inside, advancing can be fully cooled off along the road.

And projector 1 has outer side air channel member 811, so can will spray and flow to by the air of heat radiation side thermal conductive member 7115 generating components such as control basal plate 6 of the hermetically-sealed construction outside of projector 1 inside from cooling fan 714.Therefore, in projector 1, do not need to be provided with the special-purpose cooling fan of the described generating component of cooling, can reduce the quantity of cooling fan, and can simplify the cooling structure of the generating component of cooling and sealing structure outside.

At this, outer side air channel member 811 will be directed between stream rear section side air channel member 74 and the control basal plate 6 from cooling fan 714 ejection and the air by heat radiation side thermal conductive member 7115, so can utilize by stream rear section side air channel member 74, the air of advancing along the road among the stream C11 that control basal plate 6 and ventilation guide portion 812 form, cooling is owing to be configured in used for optical part casing 46 volume inside Ar1 via taking in, each optics 45 among the Ar2, the heat of 423 heated air and stream rear section side air channel member 74 that temperature is risen, and be installed in circuit component on the control basal plate 6 etc., can prevent stream rear section side air channel member 74 and control basal plate 6 deterioration of being heated.

, when driving projector 1, when driving Peltier element 7113, the relative atmosphere temperature of temperature of the heat-absorbent surface 7113A of Peltier element 7113 low during more than or equal to necessary degree, will produce dewfall in the heat absorbing side of cooling device 71.And when the heat absorbing side of cooling device 71 produced dewfall, the action that might produce cooling device 71 was bad.

In the present embodiment, constitute the polarity switch control portion 612 of Peltier control part 61, at the detected temperatures T of the heat absorbing side thermal conductive member 7111 that detects by heat absorbing side temperature detecting part 63 _D(temperature of the heat-absorbent surface 7113A of Peltier element 7113), with the atmosphere temperature T of the hermetically-sealed construction outside of detecting by atmosphere temperature detecting part 64 _PDetected temperatures poor, more than or equal to when being stored in the design temperature difference of the design temperature difference information in the storer 613, implement the polarity switching controls.Thus, in the detected temperatures difference during more than or equal to the design temperature difference, promptly, the temperature of heat absorbing side thermal conductive member 7111 (temperature of the heat-absorbent surface 7113A of Peltier element 7113) relatively the atmosphere temperature low during more than or equal to necessary degree, implement the polarity switching controls, make thus in the Peltier element 7113 towards the temperature of the one side (heat-absorbent surface 7113A) of hermetically-sealed construction inside and rise, can prevent to produce dewfall, prevent that the action of the cooling device 71 that causes because of dewfall is bad in the heat absorbing side of cooling device.

, when the driving of Peltier element 7113 begins, at short notice Peltier element 7113 is applied common magnitude of voltage V _HThe time (with reference to the double dot dash line among Figure 22), the slope that the temperature of the heat absorbing side of cooling device 71 descends is bigger, the slope that the temperature of the heat radiation side of cooling device 71 rises is bigger.Like this under the bigger situation of the slope of temperature variation, because the thermal stress between each member 7111～7115 of the Peltier unit 711 of formation cooling device 71, make that the connection status between each member 7111～7115 is destroyed, the action that might produce cooling device 71 is bad.In addition, when the driving of Peltier element 7113 stops, making the magnitude of voltage that imposes on Peltier element 7113 at short notice from common magnitude of voltage V _HChange under the situation of 0V (with reference to the double dot dash line among Figure 22), same as described above, the action that also might produce cooling device 71 is bad.

In the present embodiment, constitute the rectangle control part 611 of Peltier control part 61, when the driving of Peltier element 7113 begins, implement rectangle control, make the magnitude of voltage that imposes on Peltier element 7113 from the 0V stage be increased to common magnitude of voltage.At short notice Peltier element 7113 is applied common magnitude of voltage V thus, with as top _HIn time, compared, and can reduce the slope that the temperature of the heat absorbing side of cooling device 71 descends, and reduces the slope that the temperature of the heat radiation side of cooling device 71 rises.Therefore, can relax the thermal stress between each member 7111～7115 of the Peltier unit 711 that constitutes cooling device 71, prevent that the action of cooling device 71 is bad.

And rectangle control part 611 is implemented rectangle control when the driving of Peltier element 7113 stops, making the magnitude of voltage that imposes on Peltier element 7113 from common magnitude of voltage V _HBe reduced to stage 0V.Thus, with as top, make the magnitude of voltage that imposes on Peltier element 7113 at short notice from common magnitude of voltage V _HCompare when changing to 0V, can reduce the slope that the temperature of the heat absorbing side of cooling device 71 rises, reduce the slope that the temperature of the heat radiation side of cooling device 71 descends.Therefore, can relax the thermal stress between each member 7111～7115 of the Peltier unit 711 that constitutes cooling device 71, prevent that the action of cooling device 71 is bad.

[the 2nd embodiment]

Below, the 2nd embodiment of the present invention is described with reference to the accompanying drawings.

In the following description, give same-sign, and omit or simplify it and specify structure and the identical components identical with aforementioned the 1st embodiment.

Figure 23 is the block scheme of control structure of schematically representing the Peltier element 7113 of the 2nd embodiment.

The difference of aforementioned relatively the 1st embodiment of present embodiment is, as shown in figure 23, as the structure of Peltier control part 61A of the control device of control Peltier element 7113, and replace heat absorbing side temperature detecting part 63, detect Inside Air Temperature test section 65 in the temperature of the air of hermetically-sealed construction internal circulation.Other structures are identical with aforementioned the 1st embodiment.In addition, as long as Inside Air Temperature test section 65 is positioned at the position that can detect in the temperature of the air of hermetically-sealed construction internal circulation, then can be configured in any position.

Peltier control part 61A except the rectangle control part 611 that illustrates, also has dutycycle control part 614 and storer 613A as shown in figure 23 in aforementioned the 1st embodiment.

Dutycycle control part 614 relatively Inside Air Temperature test sections 65 detected temperatures and based on the design temperature that is stored in the design temperature information among the storer 613A, in detected temperatures during smaller or equal to design temperature, to the steering order of drive division 62 output regulations, implement intermittently to drive the dutycycle control of Peltier element 7113 based on the dutycycle that is stored in the duty cycle information among the storer 613A.

Storer 613A is identical with the storer 613 that illustrates in aforementioned the 1st embodiment, and needed information (design temperature information, duty cycle information etc.) is handled in control program and execution when storage is carried out processing by each control part 611,614.That is the storer 613A design temperature information storage part and the duty cycle information storage part that are equivalent to the present invention relates to.

About design temperature information, be about in the time will being cooled to desired temperature, in the information of the design temperature of the air of hermetically-sealed construction internal circulation as the optical devices 45, polarized light conversion element 423 etc. of cooling object.

About duty cycle information, refer to based under the control of the dutycycle of dutycycle control part 614 to Peltier element 7113 apply voltage time per unit driving time and Peltier element 7113 is not applied the relevant information of ratio (dutycycle) of non-driving time of the time per unit of voltage.

In addition, storer 613A is identical with the storer 613 that illustrates in aforementioned the 1st embodiment, and it for example constitutes can be in menu screen, waits by operating operation panel 212, telepilot and suitably changes above-mentioned design temperature information, duty cycle information.

Below, the control method of above-mentioned Peltier control part 61A to Peltier element 7113 is described.

Figure 24 is the process flow diagram of control method of the Peltier element 7113 of explanation the 2nd embodiment.

In addition, below will simplify the explanation of the processing identical with aforementioned the 1st embodiment.

At first, Peltier control part 61A is identical with aforementioned the 1st embodiment, if input power throughing signal (step S1) is just implemented the rectangle control (step S2) of Peltier element 7113 and the common driving (step S3) of Peltier element 7113.

And, when Peltier control part 61A implements to drive usually at step S3, the detected temperatures T that identification detects by Inside Air Temperature test section 65 _D(with reference to Figure 25), relatively this detected temperatures T _DWith based on the design temperature T that is stored in the design temperature information among the storer 613A _S(with reference to Figure 25) judges detected temperatures T _DWhether smaller or equal to design temperature T _S(step S6).

At step S6, when Peltier control part 61A is judged to be "No", i.e. detected temperatures T _DGreater than design temperature T _SThe time, return step S3, keep driving usually.

On the other hand, at step S6, when Peltier control part 61A is judged to be "Yes", i.e. detected temperatures T _DSmaller or equal to design temperature T _SThe time, implement dutycycle control (step S7).

Figure 25 is the figure of expression based on an example of the dutycycle control of dutycycle control part 614.

In addition, Figure 25 is identical with Figure 22, is the detected temperatures T that expression applies magnitude of voltage V (epimere) and Inside Air Temperature test section 65 _DThe figure of the state of (hypomere).

Specifically, at step S7, dutycycle control part 614 is according to shown in Figure 25, at detected temperatures T _DSmaller or equal to design temperature T _SThe time, the steering order to drive division 62 output regulations with based on the dutycycle that is stored in the duty cycle information among the storer 613A, repeats to implement Peltier element 7113 not to be applied the non-driven state D1 of voltage and Peltier element 7113 is applied common magnitude of voltage V _HDriving condition D2, implement intermittently to drive the dutycycle control of Peltier element 7113.

And between above-mentioned steps S1～S3, S6, S7, Peltier control part 61A is when the input power disconnect signal, and is identical with aforementioned the 1st embodiment, implements rectangle control, stops the driving of Peltier element 7113.

In above-mentioned the 2nd embodiment, except that the effect identical, also has following effect with aforementioned the 1st embodiment.

In the present embodiment, constitute the dutycycle control part 614 of Peltier control part 61A, at the detected temperatures T of the air of the hermetically-sealed construction inside of detecting by Inside Air Temperature test section 65 _D, smaller or equal to based on the design temperature T that is stored in the design temperature information among the storer 613A _SThe time, implement dutycycle control.Thus, at detected temperatures T _DSmaller or equal to design temperature T _SThe time, Peltier element 7113 the stable situation of driving under, by implementing dutycycle control, for example, also Peltier element 7113 is applied constant common magnitude of voltage V all the time with after the driving of Peltier element 7113 is stable _HSituation relatively, can reduce the power consumption of Peltier element 7113, save the power consumption of projector 1.And dutycycle control is enforcement after the driving of Peltier element 7113 is stable, so can fully guarantee the cooling effectiveness of the air of advancing along the road in the circulation of air path of hermetically-sealed construction inside in cooling device 71.

[the 3rd embodiment]

Below, the 3rd embodiment of the present invention is described with reference to the accompanying drawings.

In the following description, give same-sign, and omit or simplify it and specify structure and the identical components identical with aforementioned the 2nd embodiment.

Figure 26 is the block scheme of control structure of schematically representing the Peltier element 7113 of the 3rd embodiment.

Aforementioned relatively the 2nd embodiment of present embodiment as shown in figure 26, has only the structure difference as the Peltier control part 61B of the control device of controlling Peltier element 7113.Other structures are identical with aforementioned the 2nd embodiment.

Peltier control part 61B except the rectangle control part 611 that illustrates, also has voltage switch control portion 615 and storer 613B as shown in figure 26 in aforementioned the 1st embodiment.

Voltage switch control portion 615 relatively Inside Air Temperature test sections 65 detected temperatures and based on the design temperature that is stored in the design temperature information among the storer 613B, in detected temperatures during smaller or equal to design temperature, steering order to drive division 62 output regulations, according to the common driving time information and the low voltage drive temporal information that are stored among the storer 613B, implement Peltier element 7113 is repeated the voltage switching controls of driving usually and low voltage drive.

Storer 613B is identical with the storer 613 that illustrates in aforementioned the 1st embodiment, and storage is passed through each control part 611,615 and carried out the control program when handling and carry out the needed information (design temperature information, common driving time information, low voltage drive temporal information etc.) of handling.That is the storer 613B design temperature information storage part and the driving time information storage part that are equivalent to the present invention relates to.

Design temperature information is identical with the information that illustrates in aforementioned the 2nd embodiment.

About common driving time information, refer to and the relevant information of driving time that under the voltage switching controls of voltage switch control portion 615, drives (applying common magnitude of voltage) Peltier element 7113 usually.

About the low voltage drive temporal information, refer to the relevant information of driving time with low voltage drive under the voltage switching controls of voltage switch control portion 615 (applying the magnitude of voltage lower) Peltier element 7113 than common magnitude of voltage.

In addition, storer 613B is also identical with the storer 613 that illustrates in aforementioned the 1st embodiment, it for example constitutes can be in menu screen, waits by operating operation panel 212, telepilot and suitably changes above-mentioned design temperature information, driving time information, low voltage drive temporal information usually.

Below, the control method based on the Peltier element 7113 of above-mentioned Peltier control part 61B is described.

Figure 27 is the process flow diagram of control method of the Peltier element 7113 of explanation the 3rd embodiment.

In addition, processing that simplified illustration is identical with the 2nd embodiment with aforementioned the 1st embodiment below.

At first, Peltier control part 61B is identical with aforementioned the 2nd embodiment, if input power throughing signal (step S1) is then implemented the rectangle control (step S2) of Peltier element 7113, the common driving (step S3) and the detected temperatures T of Peltier element 7113 _DWhether (with reference to Figure 28) be smaller or equal to design temperature T _SThe judgement of (with reference to Figure 28) (step S6).

At step S6, when Peltier control part 61B is judged to be "No", i.e. detected temperatures T _DGreater than design temperature T _SThe time, return step S3, keep driving usually.

On the other hand, at step S6, when Peltier control part 61B is judged to be "Yes", i.e. detected temperatures T _DSmaller or equal to design temperature T _SThe time, implement voltage switching controls (step S8).

Figure 28 is the figure of expression based on an example of the voltage switching controls of Peltier control part 615.

In addition, Figure 28 is identical with Figure 22, Figure 25, is the detected temperatures T that expression applies magnitude of voltage V (epimere) and Inside Air Temperature test section 65 _DThe figure of the state of (hypomere).

Specifically, at step S8, voltage switch control portion 615 is according to shown in Figure 28, at detected temperatures T _DSmaller or equal to design temperature T _SThe time, to the steering order of drive division 62 output regulations, implement to repeat to be implemented in based on during the driving time T1 that is stored in the low voltage drive temporal information among the storer 613B Peltier element 7113 being applied than common magnitude of voltage V _HThe low voltage drive of low magnitude of voltage V1 and during based on the driving time T2 that is stored in the common driving time information among the storer 613B, Peltier element 7113 is applied common magnitude of voltage V _HThe voltage switching controls of common driving.

And between above-mentioned steps S1～S3, S6, S8, Peltier control part 61B is when having imported power disconnect signal, and is identical with aforementioned the 1st embodiment, implements rectangle control, stops the driving of Peltier element 7113.

As described in above-mentioned the 3rd embodiment, after the driving of Peltier element 7113 is stable, when taking to implement the structure of voltage switching controls, also can obtain and aforementioned the 1st embodiment and the identical effect of aforementioned the 2nd embodiment.

In addition, the invention is not restricted to aforementioned embodiments, the distortion in can reaching the object of the invention scope, improvement etc. are contained among the present invention certainly.

In aforementioned each embodiment, about being configured in the optics of hermetically-sealed construction inside, optical devices 45 and polarized light conversion element 423 have been adopted, but be not limited thereto, also can take only to dispose optical devices 45 and polarized light conversion element 423 either party's structure, perhaps can also take structure at other opticses of hermetically-sealed construction internal configurations except that optical devices 45 and polarized light conversion element 423 in hermetically-sealed construction inside.

In aforementioned each embodiment, stream rear section side air channel member 74 utilizes high heat conduction air channel portion 742 and low heat conduction air channel portion 741 these two parts to constitute, but also can not utilize low thermal conductivity material, and utilize the high heat conducting material identical to constitute the heat conduction air channel portion 741 of hanging down with high heat conduction air channel portion 742.And,, only also can adopt the structure of utilizing high heat conducting material to constitute to the position of interfering with the breach 4621 and peristome 4622 plane earths of used for optical part casing 46 about stream rear section side air channel member 74.

In aforementioned each embodiment, outer side air channel member 811 adopts and will discharge and air by heat radiation side thermal conductive member 7115 is directed to structure between stream rear section side air channel member 74 and the control basal plate 6 from cooling fan 714, but be not limited thereto, also can adopt the structure of sides such as being directed to other generating components, for example power supply unit 5, light supply apparatus 41.

In aforementioned each embodiment, about the control of Peltier element 7113, control structure, the control structure of the 2nd embodiment and the control structure of the 3rd embodiment that also can appropriate combination the 1st embodiment.

Specifically, Figure 29 is the control of dutycycle control that illustrates and the voltage switching controls that illustrates has been made up in expression in the 3rd embodiment in the 2nd embodiment figure.In addition, Figure 29 and Figure 22, Figure 25, Figure 28 are identical, are that expression applies near the temperature T magnitude of voltage V (epimere), the liquid crystal panel 451 _P(stage casing), and the detected temperatures T of heat absorbing side temperature detecting part 63 _DThe figure of the state of (hypomere).

For example, also can adopt to be combined in dutycycle control that illustrates in the 2nd embodiment and the voltage switching controls that in the 3rd embodiment, illustrates, control the structure of Peltier element 7113.That is, as shown in figure 29, after the driving of Peltier element 7113 is stable, implement to repeat not to Peltier element 7113 apply voltage non-driven state D1, Peltier element 7113 is applied common magnitude of voltage V _HDriving condition D2, non-driven state D1, Peltier element 7113 applied the control of the driving condition D3 of magnitude of voltage V1.According to this control, can further reduce the power consumption of Peltier element 7113, be fit to realize the energy-saving effect of projector 1 more.

In aforementioned each embodiment, light supply apparatus 41 utilizes the light supply apparatus of Discharge illuminating type to constitute, light emitting diode), organic EL (Electro Luminescence: electroluminescence) various solid-state light emitting elements such as element, silicon light-emitting component but be not limited thereto, also can adopt laser diode, LED (Light Emitting Diode:.

And, in aforementioned each embodiment, only use a light supply apparatus 41, be separated into the light of three kinds of colors by color separation optical system 43, but also can omit color separation optical system 43, and 3 described solid-state light emitting elements of the light that penetrates three kinds of colors are respectively constituted light supply apparatus.

In aforementioned each embodiment, about color synthesizing optical device, adopted cross dichroic prism 453, but be not limited thereto, also can adopt structure by using a plurality of dichronic mirrors to synthesize shades of colour light.

In aforementioned each embodiment, projector 1 utilizes the three-plate type projector with 3 liquid crystal panels 451 to constitute, but is not limited thereto, and also can utilize the one-board projector with a liquid crystal panel to constitute.And, can also constitute the projector with two liquid crystal panels, projector with 4 or 4 above liquid crystal panels.

In aforementioned each embodiment, used light to inject the face transmissive liquid crystal panel different with light emergence face, use up the face of the injecting reflection type liquid crystal panel identical but also can make with light emergence face.

In aforementioned each embodiment, used liquid crystal panel about optic modulating device, but also can use the optic modulating device outside the liquid crystal.

In aforementioned each embodiment, only enumerated the example of carrying out the pre-projecting type projector of projection from the direction of view screen, but the present invention also goes for the rear projector for projecting that carries out projection from the opposition side of the direction of view screen.

About implementing optimum structure of the present invention etc., in above narration, disclose, but the invention is not restricted to this.Promptly, the present invention mainly illustrates specific embodiment especially, but under the situation that does not break away from technical conceive of the present invention and purpose scope, about shape, material, quantity and other concrete structures, industry personnel can carry out various distortion to the embodiment of above explanation.

Therefore, the description that defines above disclosed shape, material etc. only is the exemplary description of doing in order to understand the present invention easily, can not be used for limiting the present invention, so adopted the description of the member titles that a part that breaks away from these shapes, material etc. limits or all limit also to be contained among the present invention certainly.

Projector of the present invention can stably be guaranteed the image quality of projected image, and can cool off optics effectively, so can be as the projector that uses in demonstration meeting and home theater.

Claims (9)

1. projector is to possess: is configured in optics and makes the projector of circulating fan of the air circulation in described ring-type circulation of air path, it is characterized in that with the hermetically-sealed construction inside that makes the ring-type circulation of air path that air can circulate,

Described hermetically-sealed construction constitutes and comprises:

The used for optical part casing, it takes in the described optics of configuration in inside, and has and be used to pass air into inner inflow entrance and make air flow out to outside flow export;

A plurality of air channels member, by described inflow entrance air is directed to described used for optical part box house, and will flow out to air outside from described used for optical part box house by described flow export, be directed to described used for optical part box house by described inflow entrance once more; And

Cooling device with thermoelectric conversion element, this thermoelectric conversion element have towards the heat-absorbent surface of described hermetically-sealed construction inside with towards the radiating surface of described hermetically-sealed construction outside;

Wherein, described cooling device, described circulating fan and the described used for optical part casing circulation of air direction in the described circulation of air path, with the order setting of described cooling device, described circulating fan and described used for optical part casing,

From the stream leading portion crosswind road member of described cooling device, utilize pyroconductivity to constitute in the member of described a plurality of air channels smaller or equal to the material of 0.9W/ (mK) to described used for optical part casing guiding air,

From the stream rear section side air channel member of described used for optical part casing, utilize pyroconductivity to constitute in the member of described a plurality of air channels more than or equal to the material of 42W/ (mK) to described cooling device guiding air.

2. projector is to possess: is configured in optics and makes the projector of circulating fan of the air circulation in described ring-type circulation of air path, it is characterized in that with the hermetically-sealed construction inside that makes the ring-type circulation of air path that air can circulate,

Described hermetically-sealed construction constitutes and comprises:

The used for optical part casing, it takes in the described optics of configuration in inside, and has and be used to pass air into inner inflow entrance and make air flow out to outside flow export;

A plurality of air channels member, by described inflow entrance air is directed to described used for optical part box house, and will flow out to air outside from described used for optical part box house by described flow export, be directed to described used for optical part box house by described inflow entrance once more; And

Cooling device with thermoelectric conversion element, this thermoelectric conversion element have towards the heat-absorbent surface of described hermetically-sealed construction inside with towards the radiating surface of described hermetically-sealed construction outside;

Wherein, described cooling device, described circulating fan and the described used for optical part casing circulation of air direction in the described circulation of air path, with the order setting of described cooling device, described circulating fan and described used for optical part casing,

From the stream leading portion crosswind road member of described cooling device, utilize pyroconductivity to constitute in the member of described a plurality of air channels smaller or equal to the material of 0.9W/ (mK) to described used for optical part casing guiding air,

From the stream rear section side air channel member of described used for optical part casing, have high heat conduction air channel portion in the position that can blow to by described flow export in the member of described a plurality of air channels via the heated air of described optics to described cooling device guiding air,

Described high heat conduction air channel portion utilizes pyroconductivity to constitute more than or equal to the material of 42W/ (mK).

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

Described stream rear section side air channel member utilizes described high heat conduction air channel portion and constitutes near these two parts of low heat conduction air channel portion that described used for optical part casing is provided with,

Described low heat conduction air channel portion utilizes pyroconductivity to constitute smaller or equal to the material of 0.9W/ (mK).

4. projector according to claim 1 is characterized in that,

Described cooling device has: be installed in the heat-absorbent surface of described thermoelectric conversion element and heat absorbing side thermal conductive member on the radiating surface and heat radiation side thermal conductive member in the mode that can transmit heat; And import air and be ejected into cooling fan on the described heat radiation side thermal conductive member from this projector outside to inside;

Described projector has outer side air channel member, and it will be from ejection of described cooling fan and the air by described heat radiation side thermal conductive member, is directed on the generating component of described hermetically-sealed construction outside of this projector inside.

5. projector according to claim 4 is characterized in that,

Control basal plate with member of formation of this projector of control,

Guide the stream rear section side air channel member and the described control basal plate of air in described used for optical part casing, the described a plurality of air channels member to described cooling device from described used for optical part casing, sequential cascade configuration according to described used for optical part casing, described stream rear section side air channel member and described control basal plate

Described outer side air channel member will be directed between described stream rear section side air channel member and the described control basal plate from ejection of described cooling fan and the air by described heat radiation side thermal conductive member.

6. according to each described projector in the claim 1～5, it is characterized in that,

Have: control device, it applies voltage, the described thermoelectric conversion element of drive controlling to described thermoelectric conversion element; The heat absorbing side temperature detecting part, it detects the temperature that is installed in the heat absorbing side thermal conductive member on the heat-absorbent surface of described thermoelectric conversion element in the mode that can transmit heat; The atmosphere temperature detecting part, it detects the atmosphere temperature of described hermetically-sealed construction outside;

Wherein, described control device has:

Design temperature difference information storage part, the design temperature difference information of the design temperature difference correlation of the design temperature of storage and described heat absorbing side thermal conductive member and the setting atmosphere temperature of described hermetically-sealed construction outside;

The polarity switch control portion, relatively by the detected temperatures of described heat absorbing side temperature detecting part detection and the atmosphere temperature that detects by described atmosphere temperature detecting part, more than or equal to based on the design temperature difference of described design temperature difference information the time, implement the polarity switching controls that the polarity of the voltage that imposes on described thermoelectric conversion element is switched in the detected temperatures difference of described detected temperatures and described atmosphere temperature.

7. according to each described projector in the claim 1～5, it is characterized in that,

Have the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling,

Wherein, described control device has the rectangle control part of implementing following rectangle control, promptly, when the driving of described thermoelectric conversion element begins, be increased to common magnitude of voltage with making magnitude of voltage stage of imposing on described thermoelectric conversion element, when the driving of described thermoelectric conversion element stops, the magnitude of voltage that imposes on described thermoelectric conversion element is reduced from described common magnitude of voltage stage ground.

8. according to each described projector in the claim 1～5, it is characterized in that,

Have: the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling; Inside Air Temperature test section with the air themperature that detects described hermetically-sealed construction inside;

Wherein, described control device has:

The design temperature information storage part is stored the design temperature information relevant with the air design temperature of described hermetically-sealed construction inside;

The duty cycle information storage part, storage and the relevant duty cycle information of stipulating of dutycycle;

The dutycycle control part, the detected temperatures that detects by described Inside Air Temperature test section and relatively based on the design temperature of described design temperature information, during smaller or equal to described design temperature, implement intermittently to drive the dutycycle control of described thermoelectric conversion element in described detected temperatures with dutycycle based on described duty cycle information.

9. according to each described projector in the claim 1～5, it is characterized in that,

Have: the control device that described thermoelectric conversion element is applied voltage, the described thermoelectric conversion element of drive controlling; Inside Air Temperature test section with the air themperature that detects described hermetically-sealed construction inside;

Wherein, described control device has:

The design temperature information storage part, the design temperature information that its storage is relevant with the air design temperature of described hermetically-sealed construction inside;

The driving time information storage part, its storage common driving time information relevant and the low voltage drive temporal information of being correlated with the driving time of the low described thermoelectric conversion element of magnitude of voltage low voltage drive of the common magnitude of voltage that applies with than described common driving the time with the driving time of the described thermoelectric conversion element of common driving;

The voltage switch control portion, the detected temperatures that it is relatively detected by described Inside Air Temperature test section and based on the design temperature of described design temperature information, in described detected temperatures during smaller or equal to described design temperature, according to described common driving time information and described low voltage drive temporal information, implement to repeat the voltage switching controls of described common driving and described low voltage drive.

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