JP2004317956A - Image device and peltier element device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image device capable of effectively cooling the components of an optical system by directly cooling the components of the optical system and also restraining inconvenience such as dust or the like. <P>SOLUTION: The image device has the components of the optical system arranged in an optical path through which light to form an image passes and transmitting or reflecting the light. It has a heat conducting member 1 (11, 12 and 13) formed of heat conductive material having a light transmitting window aperture 2 through which the light is transmitted, and a cooling means 3 for cooling the member 1 (11, 12 and 13). At least the parts 5 and 6 of the components of the optical system are disposed on the member 1 (11, 12 and 13) so as to face to the light transmitting window apertures 21, 22 and 23 of the member 1, and cooled by a cooling means 3 through the member 1 (11, 12 and 13). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image device such as a projector device and a Peltier device used for the image device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been provided an image apparatus having an optical system component that is disposed on an optical path through which light for forming an image passes and transmits or reflects light. According to this imaging device, when the optical system component absorbs or reflects light, the light is absorbed by the optical system component and becomes heat, which may cause a rise in the temperature of the optical system component. Deterioration of system parts may progress. 2. Description of the Related Art In recent years, the amount of light from a light source has tended to increase with higher performance of image devices. For this reason, deterioration of the optical system components may be promoted.
[0003]
Therefore, a technology according to Patent Document 1 has been developed. According to this method, a heat conduction plate formed of a material having good heat conductivity is provided in an optical chamber in an optical block, and a circulating wind for circulating air by a fan is formed, so that heat in the optical chamber of the optical block is generated. The conductive plate is cooled by circulating air to enhance the cooling of optical components. Further, Patent Literature 1 discloses a technique for cooling a heat conductive plate with a heat pipe or a Peltier device.
[0004]
[Patent Document 1] JP-A-10-254062
[0005]
[Problems to be solved by the invention]
According to the technique disclosed in Patent Document 1 described above, a heat conduction plate made of a material having good heat conductivity is provided in an optical chamber in an optical block, and a fan is used to form a circulating wind for circulating air, thereby providing an optical system. The heat conduction plate in the optical chamber of the block is cooled by circulating wind, thereby cooling the optical system components. Therefore, at least two heat exchanges such as a heat conduction plate-circulating wind and a circulating wind-optical system component are required. For this reason, there is a problem that it is difficult to effectively cool the optical system components due to loss of heat exchange.
[0006]
That is, according to the technology according to Patent Document 1 described above, although the heat conductive plate is cooled by the heat pipe or the Peltier element, the heat conductive plate and the optical system component are not in contact with each other, and the optical system component is cooled by the heat conductive plate. Instead of cooling directly, a circulating air is formed by a fan, and the optical system components are indirectly cooled via the circulating air. Therefore, there is a limit to cooling of the optical system components.
[0007]
The present invention has been made in view of the above-described circumstances, and by directly cooling an optical system component by a heat conducting member, the optical system component can be effectively cooled, and thermal degradation of the optical system component can be suppressed. An object of the present invention is to provide an image device capable of extending the life of an optical system component.
[0008]
[Means for Solving the Problems]
(1) An image device according to a first aspect of the present invention is an image device having an optical system component arranged in an optical path through which light for forming an image passes.
A heat conductive member formed of a material having heat conductivity, and cooling means for cooling the heat conductive member,
At least a part of the optical system component is provided on the heat conducting member, and is cooled by the cooling means via the heat conducting member.
[0009]
According to the image device according to the first aspect of the present invention, at least a part of the optical system component is disposed on the heat conductive member, and is cooled via the heat conductive member cooled by the cooling unit. As described above, the optical components provided on the heat conductive member are directly cooled by the heat conductive member, the temperature rise of the optical components is suppressed, and the thermal degradation of the optical components is suppressed.
[0010]
(2) An image device according to a second aspect of the present invention is an image device having an optical system component disposed on an optical path through which light for forming an image passes.
A heat conductive member formed of a material having heat conductivity having a light-transmitting window opening capable of transmitting light, and a cooling unit for cooling the heat conductive member,
At least a part of the optical system component is disposed on the heat conductive member so as to face the light transmitting window opening of the heat conductive member, and is cooled via the heat conductive member by cooling means. Is what you do.
[0011]
According to the image device according to the second aspect of the present invention, at least a part of the optical system component is disposed on the heat conductive member so as to face the light-transmitting window opening of the heat conductive member, and is provided by the cooling unit. It is cooled via the heat conducting member to be cooled. As described above, the optical components provided on the heat conductive member are directly cooled by the heat conductive member, the temperature rise of the optical components is suppressed, and the thermal degradation of the optical components is suppressed. The light-transmitting window opening formed in the heat-conducting member does not block the optical path through which light can pass, so that optical components such as a liquid crystal panel and a polarizing plate can be attached to the light-transmitting window opening. Therefore, the optical components can be cooled while securing the optical paths of the optical components such as the liquid crystal panel and the polarizing plate.
(3) A Peltier device according to a third aspect of the present invention is characterized in that the Peltier device has a frame shape having a light-transmitting window opening penetrating in a thickness direction.
[0012]
According to the third aspect of the Peltier device according to the present invention, since the light-transmitting window opening is capable of transmitting light, the optical components such as the liquid crystal panel and the polarizing plate can be connected to the light-transmitting window without blocking the optical path. Can be attached to the opening. Therefore, the optical components can be cooled by the Peltier device while securing the optical paths of the optical components such as the liquid crystal panel and the polarizing plate.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the present invention, a plurality of optical system components are provided, one optical system component is provided on one side of the heat conducting member, and the other optical system component is provided on the other side of the heat conducting member. The form provided can be illustrated. Thereby, the plurality of optical system components can be effectively cooled by the heat conducting member. The heat conducting member is preferably formed in a frame shape having a light-transmitting window opening.
[0014]
The cooling means cools the heat conducting member. The cooling means is not particularly limited as long as it has a cooling function, and examples thereof include a Peltier element exhibiting an endothermic effect by a Peltier effect and a heat pipe exhibiting an endothermic effect of a refrigerant. In some cases, a refrigerator such as a pulse tube refrigerator or a Stirling refrigerator using nitrogen, oxygen, helium, chlorofluorocarbon or the like as a refrigerant may be used as the cooling means.
[0015]
The heat conductive member can be integrally formed by assembling a plurality of members having heat conductivity. In this case, the plurality of members are in thermal contact with each other and are capable of transferring heat, and a form in which heat transfer is possible can be exemplified.
[0016]
Furthermore, a mode in which a plurality of cooling means are provided independently of each other on a plurality of members can be adopted. In this case, even if any one of the plurality of cooling means should fail, if the plurality of members are capable of conducting heat to each other, the entire heat conduction member can be cooled by the normally operating cooling means. And reliability can be further improved.
[0017]
A plurality of optical system components are provided, and the heat conductive member is a first heat conductive member provided with at least one optical system component among the plurality of optical system components, and a different one of the plurality of optical system components. And a second heat conducting member provided with the optical system component described above, and the cooling ability of the second heat conducting member is set to be larger than the cooling ability of the first heat conducting member.
[0018]
Depending on the type of optical system component, the tendency of increasing the temperature of the optical system component depending on the wavelength of light may not always be the same. Therefore, if the cooling capacity of the second heat conducting member is set to be larger than the cooling capacity of the first heat conducting member, if the second heat conducting member is arranged in an optical path through which light that tends to increase the temperature passes, I can deal with the circumstances.
[0019]
In setting the cooling capacity of the second heat conducting member to be larger than the cooling capacity of the first heat conducting member, the following method may be used. That is, a method in which the heat conduction of the second heat conduction member is set to be larger than the heat conduction of the first heat conduction member can be exemplified. In this case, a method in which the thickness of the second heat conductive member is set to be larger than the thickness of the first heat conductive member can be exemplified. Further, a method in which the material of the second heat conductive member has a higher heat transfer coefficient than the material of the first heat conductive member can be exemplified. In addition, a mode in which the cooling capacity per unit time of the cooling means for cooling the second heat conducting member is set to be larger than the cooling capacity per unit time of the cooling means for cooling the first heat conducting member can be exemplified.
[0020]
Empirically, it has been found that among the red, green, and blue lights, light having a blue wavelength has a strong tendency to increase the temperature of the optical system component. For this reason, when a light path for red light, a light path for green light, and a light path for blue light are provided, the cooling ability of the heat conducting member arranged on the light path side through which light having a blue wavelength passes is different. The cooling ability of the first heat conductive member disposed on the optical path side through which light having the wavelength of the color is transmitted can be exemplified.
[0021]
The image device according to the present invention may be any device that has an optical system component disposed in an optical path through which light for forming an image passes. As the image device, a projector device can be exemplified, and a device for enlarging information of base paper and forming an image, or a device for converting an image information signal into an image may be used.
[0022]
【Example】
(First embodiment)
Hereinafter, a first embodiment of the present invention will be specifically described with reference to FIGS. The image device according to the present embodiment is a projector device for image formation. The projector device has a heat conducting member 1 as shown in FIG. The heat conductive member 1 is formed of a heat conductive material having a light transmitting window opening 2 penetrating in a thickness direction capable of transmitting light. Examples of the material having thermal conductivity include aluminum, aluminum alloy, copper, copper alloy, and steel plate.
[0023]
As shown in FIG. 1, the heat conductive member 1 includes a plate-shaped first heat conductive member 11, a plate-shaped second heat conductive member 12, a plate-shaped third heat conductive member 13, and a plate-shaped fourth heat conductive member. It is formed by assembling with the member 14 by welding, screwing, or the like, and forms a tetrahedron.
[0024]
The first heat conductive member 11 relates to an optical path (first optical path) that transmits a red (R) wavelength. The second heat conductive member 12 relates to an optical path (second optical path) that transmits a blue (B) wavelength. The third heat conductive member 13 relates to an optical path (first optical path) that transmits a green (G) wavelength.
[0025]
Here, as shown in FIG. 1, the first heat conductive member 11, the second heat conductive member 12, and the third heat conductive member 13 form a U-shaped body 300 having a U-shaped cross section as a whole. I have. The fourth heat conductive member 14 forms a U-shaped bottom plate 301 and increases the strength and rigidity of the U-shaped body 300.
[0026]
As shown in FIG. 1, the first heat conductive member 11 has a rectangular frame shape, and has a rectangular first light-transmitting window opening 21 in the center region. The second heat conducting member 12 has a square frame shape, and has a square second light-transmitting window opening 22 in the center region. The third heat conductive member 13 has a rectangular frame shape, and has a rectangular third light-transmitting window opening 23 in the center area. The fourth heat conductive member 14 has a rectangular frame shape and does not have the light-transmitting window opening 2.
[0027]
Between the first to fourth heat conductive members 11 to 14 formed of a material having thermal conductivity, heat can be transferred to each other, and heat can be transferred.
[0028]
As shown in FIG. 2, a Peltier element device 3 as a cooling means is integrally attached to the bottom surface of the fourth heat conducting member 14 with an adhesive or a screw. The Peltier element device 3 has a large number of Peltier elements, which are thermoelectric elements, and has a heat absorbing surface 3a having a heat absorbing effect and a heat radiating surface 3b having a heat radiating effect, which face each other. The heat absorbing surface 3 a of the Peltier device 3 is attached to the bottom surface of the fourth heat conducting member 14.
[0029]
Accordingly, when the Peltier device 3 is energized and operated, the fourth heat conducting member 1 absorbs heat from the heat absorbing surface 3 a of the Peltier device 3 and is cooled. As a result, the first heat conductive member 11, the second heat conductive member 12, and the third heat conductive member 13 are cooled.
[0030]
As shown in FIGS. 2 and 3, a heat sink 4 having heat dissipating fins 4 a for increasing a heat dissipating area is integrally provided on a heat dissipating surface 3 b of the Peltier element device 3. The heat sink 4 is formed of a material having thermal conductivity.
[0031]
Examples of the material of the heat sink 4 include aluminum, aluminum alloy, copper, copper alloy, and steel. The heat sink 4 may be in a form of natural cooling or a method of air cooling with a fan.
[0032]
When air cooling is performed by a fan, the liquid crystal panel 5 and the polarizing plate 6 are separated from the heat sink 4 by a partition plate 4b in order to prevent dust and the like from adhering to optical components such as a liquid crystal panel 5 and a polarizing plate 6 described later. It is preferable to prevent dust and the like from entering the partition and the optical path.
[0033]
According to the present embodiment, as can be understood from FIG. 3, three liquid crystal panels 5 and three polarizing plates 6 are provided on the heat conductive member 1 as optical components. The liquid crystal panel 5 has a light transmitting portion 5a made of a liquid crystal material as a base material, and a frame 5b holding the light transmitting portion 5a. The three liquid crystal panels 5 constitute red (R), blue (B), and green (G), respectively. The translucent portion 5a of the liquid crystal panel 5 has a large number of translucent and light-blockable pixels arranged side by side in the vertical and horizontal directions. An image is formed by light transmission and light blocking of the pixel.
[0034]
In addition, the polarizing plate 6 has a light transmitting portion 6a using a polarizing material (resin) for preventing polarization as a base material, and a frame 6b holding the light transmitting portion 6a. The three polarizing plates 6 constitute red (R), blue (B), and green (G), respectively.
[0035]
As shown in FIG. 3, red (R) light, blue (B) light, and green (G) light are combined in the chamber 1r in the central region of the heat conductive member 1 forming the tetrahedron. A prism 200 is arranged.
[0036]
As schematically shown in FIG. 4, the frame 5b of the liquid crystal panel 5 is fixed to one surface of the first heat conductive member 11 with an adhesive or a screw. Thereby, the liquid crystal panel 5 is disposed on one side of the first heat conductive member 11. The frame 6b of the polarizing plate 6 is fixed to the other one surface of the first heat conductive member 11 by an adhesive or a screw. Thereby, the polarizing plate 6 is disposed on the other one surface of the first heat conductive member 11.
[0037]
As a result, as shown in FIG. 4, the liquid crystal is moved so that the light transmitting part 5 a of the liquid crystal panel 5 and the light transmitting part 6 a of the polarizing plate 6 face the first light transmitting window opening 21 of the first heat conductive member 11. The panel 5 and the polarizing plate 6 are provided on the first heat conductive member 11. That is, as shown in FIG. 4, the liquid crystal panel 5 and the polarizing plate 6 are held by the first heat conductive member 11 so as to sandwich the first heat conductive member 11 in the thickness direction thereof.
[0038]
The same applies to the second heat conductive member 12. That is, the frame 5 a of the liquid crystal panel 5 is fixed to one surface of the second heat conductive member 12 with an adhesive and disposed. The frame 6a of the polarizing plate 6 is fixed to the other surface of the second heat conductive member 12 with an adhesive and disposed. As a result, the liquid crystal panel 5 and the polarizing plate 6 are disposed on the second heat conductive member 12 so as to face the second light transmitting window opening 22 of the second heat conductive member 12.
[0039]
Here, as shown in FIG. 3, the polarizing plate 6 is arranged outside the heat conducting member 1, and the liquid crystal panel 5 is arranged inside the heat conducting member 1. That is, the polarizing plate 6 is located outside the chamber 1r in the central region of the heat conduction member 1 forming the tetrahedron, and the liquid crystal panel 5 is arranged inside the chamber 1r. This is to project light as uniform as possible with little polarization in the direction perpendicular to the optical path, that is, in the plane direction of the liquid crystal panel.
[0040]
Similarly, the liquid crystal panel 5 and the polarizing plate 6 are provided for the third heat conductive member 13. The liquid crystal panel 5 and the polarizing plate 6 are not provided on the fourth heat conductive member 14.
[0041]
According to the present embodiment, in use, the Peltier device 3 is energized, and a heat absorbing action is generated on the heat absorbing surface 3a of the Peltier device 3. Then, the first to fourth heat conducting members 11 to 14 are absorbed and cooled. As a result, the liquid crystal panel 5 and the polarizing plate 6 are cooled by the first to fourth heat conductive members 11 to 14 that have absorbed heat. That is, the liquid crystal panel 5 and the polarizing plate 6 are formed of a material having good thermal conductivity and are directly cooled by the heat conducting member 1 which absorbs heat without passing through air.
[0042]
Therefore, the liquid crystal panel 5 and the polarizing plate 6 can be effectively cooled, the temperature rise and the thermal deterioration of the liquid crystal panel 5 and the polarizing plate 6 can be effectively suppressed, and the long life of the liquid crystal panel 5 and the polarizing plate 6 can be achieved. Can be achieved.
[0043]
According to the present embodiment, it is possible to eliminate the problem that dust and the like are blown to the optical components such as the liquid crystal panel 5 and the polarizing plate 6 when the air blowing by the fan is not used.
[0044]
According to the present embodiment, as described above, the first heat conductive member 11 has a frame shape, and has the first light-transmitting window opening 21 in the center region. Therefore, the heat conductive material of the first heat conductive member 11 exists around the first light transmitting window opening 21. Therefore, the liquid crystal panel 5 and the polarizing plate 6 can be cooled from the periphery thereof, and the cooling unevenness of the polarizing plate 6 can be reduced.
[0045]
Similarly, the cooling unevenness of the liquid crystal panel 5 and the polarizing plate 6 held so as to face the second light transmitting window opening 22 of the second heat conductive member 12 can be reduced. Similarly, the cooling unevenness of the liquid crystal panel 5 and the polarizing plate 6 held so as to face the third light-transmitting window opening 23 of the third heat conductive member 13 can be reduced.
[0046]
(Second embodiment)
Hereinafter, a second embodiment of the present invention will be specifically described with reference to FIG. The second embodiment has basically the same configuration as the first embodiment, and has the same operation and effect. The common parts are basically given the same reference numerals. Hereinafter, a description will be given focusing on portions different from the first embodiment. The first heat conductive member 11 relates to an optical path (first optical path) that transmits a red (R) wavelength. The second heat conductive member 12 relates to an optical path (second optical path) that transmits a blue (B) wavelength. The third heat conductive member 13 relates to an optical path (first optical path) that transmits a green (G) wavelength.
[0047]
Empirically, it is considered that, among red, green, and blue light, light having a blue wavelength tends to increase the temperature of the liquid crystal panel 5, the polarizing plate 6, and optical components such as lenses. . Therefore, according to the present embodiment, the cooling ability of the second heat conducting member 12 with respect to the optical path (second optical path) of the light having the blue wavelength is the cooling ability of the first heat conducting member 11 and the third heat conducting member 13. Is set to be larger than the cooling capacity.
[0048]
Specifically, the thickness of the second heat conductive member 12 arranged in the optical path of blue (B) light is the thickness of the first heat conductive member 11 arranged in the optical path of red (R) light, and the thickness of green ( The thickness is set to be larger than the thickness of the third heat conductive member 13 arranged in the optical path of the light of G). Therefore, the heat conduction of the second heat conduction member 12 is set to be larger than the heat conduction of the first heat conduction member 11 and the heat conduction of the third heat conduction member 13.
[0049]
(Third embodiment)
Hereinafter, a third embodiment of the present invention will be specifically described with reference to FIG. The third embodiment has basically the same configuration as the first embodiment, and has the same operation and effect. The common parts are basically given the same reference numerals. Hereinafter, a description will be given focusing on portions different from the first embodiment. A refrigerant evaporator 40 is integrally connected to the heat radiation surface 3b of the Peltier device 3. The refrigerant evaporator 40 having good thermal conductivity is a part of the heat pipe 7.
[0050]
The heat pipe 7 includes a refrigerant evaporator 40 that evaporates and absorbs the refrigerant contained in the heat pipe 7, a refrigerant condenser 71 that condenses and dissipates the refrigerant, and a refrigerant evaporator 40 and the refrigerant condenser 71. And a refrigerant passage 72 for circulating the refrigerant therebetween.
[0051]
The heat generated from the heat radiation surface 3b of the Peltier element device 3 is radiated by the refrigerant being vaporized in the refrigerant evaporator 40. The refrigerant condensing section 71 having a heat radiation function is provided away from the refrigerant evaporating section 40, which is advantageous for suppressing the temperature rise of the refrigerant evaporating section 40.
[0052]
As described above, according to the present embodiment, since the Peltier element device 3 and the heat pipe 7 are used in combination, it is advantageous to improve the cooling capacity of the heat conductive member 1, and the thermal degradation of the liquid crystal panel 5 and the polarizing plate 6. , And the life of the liquid crystal panel 5 and the polarizing plate 6 can be further extended.
[0053]
(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be specifically described with reference to FIG. The fourth embodiment has basically the same configuration as the first embodiment, and has the same operation and effect. The common parts are basically given the same reference numerals. Hereinafter, the description will be made focusing on the different parts.
[0054]
As shown in FIG. 7, the heat conductive member 1 includes a first heat conductive member 11 having an L-shaped cross section, a second heat conductive member 12 having an L-shaped cross section, and a third heat conductive member 13 having an L-shaped cross section. And is assembled. The first heat conductive member 11 is formed by a vertical plate 17 having a first light-transmitting window opening 21 and a horizontal plate 18 connected to the vertical plate 17. The second heat conducting member 12 is formed by a vertical plate 17 having a second light-transmitting window opening 22 and a horizontal plate 18 connected to the vertical plate 17. The third heat conductive member 13 is formed by a vertical plate 17 having a third light-transmitting window opening 23 and a horizontal plate 18 connected to the vertical plate 17.
[0055]
As shown in FIG. 7, each vertical plate 17 extends in the up-down direction. Each of the horizontal plates 18 extends in a direction away from each other. As a result, the posture stability can be improved while the cooling performance of the entire heat conducting member 1 is improved.
[0056]
As shown in FIG. 7, Peltier element devices 3 as cooling means are individually attached to the respective horizontal plates 18 of the first to third heat conductive members 11 to 13. The heat absorbing surface 3 a of each Peltier device 3 is attached to the bottom surface of the horizontal plate 18. Each Peltier device 3 is set so as to exhibit a cooling capacity independently of each other.
[0057]
When the Peltier device 3 is energized and operated, the horizontal plate 18 is cooled by the heat absorbing action of the heat absorbing surface 3a of the Peltier device 3, and the first to third heat conducting members 11 to 13 are cooled.
[0058]
On the heat dissipation surface 3b of the Peltier device 3, a heat sink 4 having heat dissipation fins 4a for increasing the heat dissipation area is provided. The heat sink 4 has a large area so as to increase a heat radiation area, and holds the horizontal plates 18 of the first to third heat conductive members 11 to 13.
[0059]
According to the present embodiment, as described above, the Peltier device device 3 as a cooling means is individually attached to the first to third heat conducting members 11 to 13. Moreover, the first to third heat conducting members 11 to 13 made of a material having good heat conductivity are in thermal contact with each other to be able to conduct heat, and the first to third heat conducting members 11 to 13 are formed. The heat can be transferred between the three heat conducting members 13.
[0060]
Therefore, even if one of the Peltier element devices 3 individually provided in the first to third heat conductive members 11 to 13 is out of order, the other Peltier element devices 3 operate normally. The first heat conductive member 11 to the third heat conductive member 13 can be cooled, and the liquid crystal panel 5 and the polarizing plate 6 attached to the first heat conductive member 11 to the third heat conductive member 13 can be cooled, thereby further improving reliability. Can be enhanced.
[0061]
(Fifth embodiment)
Hereinafter, a fifth embodiment of the present invention will be specifically described with reference to FIG. The fifth embodiment has basically the same configuration as the above-described fourth embodiment, and has the same operation and effect. Hereinafter, a description will be given focusing on portions different from the fourth embodiment. The heat conductive member 1 has a first heat conductive member 11 having an L-shaped cross section, a second heat conductive member 12 having an L-shaped cross section, and a third heat conductive member 13 having an L-shaped cross section. .
[0062]
Peltier element devices 3 as cooling means are individually attached to the respective horizontal plates 18 of the first to third heat conductive members 11 to 13. Each of the Peltier element devices 3 is capable of exerting a cooling ability independently of each other.
[0063]
The first heat conductive member 11 is disposed in an optical path that transmits a red (R) wavelength. The second heat conductive member 12 is disposed on an optical path (second optical path) that transmits a blue (B) wavelength. The third heat conductive member 13 is disposed in an optical path that transmits a green (G) wavelength.
[0064]
According to the present embodiment, the cooling ability of the second heat conducting member 12 disposed on the optical path (second optical path) of the light having the wavelength of blue (B) is equal to the cooling ability of the first heat conducting member 11, (3) It is set to be larger than the cooling capacity of the heat conducting member 13.
[0065]
Specifically, the cooling capacity per unit time of the Peltier device 3 attached to the second heat conducting member 12 is determined by the cooling capacity per unit time of the Peltier device 3 attached to the first heat conducting member 11. The cooling capacity per unit time of the Peltier device 3 attached to the third heat conducting member 13 is set to be larger than the cooling capacity per unit time. Accordingly, it is possible to effectively secure the cooling capability of the second heat conducting member 12 that tends to increase in temperature and is arranged in the optical path (second optical path) of light having a wavelength of blue (B).
[0066]
Although not shown, the thickness of the second heat conductive member 12 disposed on the optical path (second optical path) of light having a wavelength of blue (B) is determined by the thickness of the first heat conductive member 11 and the third heat conductive member. A mode in which the thickness is set to be larger than the thickness of the conductive member 13 may be adopted.
[0067]
(Sixth embodiment)
Hereinafter, a sixth embodiment of the present invention will be specifically described with reference to FIG. The sixth embodiment has basically the same configuration as the fourth embodiment, and has the same operation and effect. Hereinafter, a description will be given focusing on portions different from the first embodiment. The heat conducting member 1B is formed of a Peltier device having a rectangular frame shape having a light-transmitting window opening 30x, and has a heat absorbing surface 3a and a heat radiating surface 3b.
[0068]
As described above, the heat pipe 7 evaporates the refrigerant and absorbs heat, the refrigerant evaporator 70, the refrigerant condensing part 71 that condenses the refrigerant, and circulates the refrigerant between the refrigerant evaporator 70 and the refrigerant condensing part 71. And a refrigerant passage 72. The refrigerant evaporator 70 of the heat pipe 7 has a rectangular frame shape having a light-transmitting window opening 70x capable of transmitting light. However, the frame is not limited to the square frame shape, and may be a frame having another shape such as a circular shape.
[0069]
As shown in FIG. 9, the light-transmitting window opening 30x of the Peltier device constituting the heat conducting member 1B and the light-transmitting window opening 70x of the refrigerant evaporator 70 face each other and communicate with each other. The refrigerant evaporating section 70 that exerts an endothermic effect is joined to the heat dissipation surface 3b of the Peltier device that constitutes the heat conducting member 1B. Examples of the joining means include an adhesive and a screw.
[0070]
As shown in FIG. 9, a liquid crystal panel 5 and a polarizing plate 6 are sequentially joined to the heat absorbing surface 3a of the Peltier device constituting the heat conducting member 1B in a laminated state.
[0071]
Conversely, the polarizing plate 6 and the liquid crystal panel 5 may be stacked in this order on the heat absorbing surface 3a of the Peltier device constituting the heat conducting member 1B.
[0072]
According to the present embodiment, the light transmitting part 5a of the liquid crystal panel 5 and the light transmitting part 6a of the polarizing plate 6 constitute the light transmitting window opening 70x of the refrigerant evaporating part 70 and the light transmitting part of the Peltier element device constituting the heat conducting member 1B. The polarizing plate 6 and the liquid crystal panel 5 are disposed on the heat conducting member 1B so as to face the window opening 30x. Thereby, the polarizing plate 6 and the liquid crystal panel 5 are cooled by the heat absorbing surface 3a of the heat conducting member 1B.
[0073]
As shown in FIG. 9, three refrigerant evaporators 70 are provided, and are connected in series by a refrigerant passage 72m. In some cases, the plurality of refrigerant evaporators 70 may be connected in parallel by the refrigerant passage 72m.
[0074]
As described above, according to the present embodiment, the Peltier element device constituting the heat conducting member 1B and the heat pipe 7 are used in combination, which is advantageous in improving the cooling capacity for the polarizing plate 6 and the liquid crystal panel 5. Thus, it is possible to contribute to suppressing thermal deterioration of the liquid crystal panel 5 and the polarizing plate 6, and it is possible to further extend the life of the liquid crystal panel 5 and the polarizing plate 6.
[0075]
The Peltier element device having the light-transmitting window opening 30x is not limited to a square frame shape, but may be a circular frame shape. The frame-shaped Peltier device having the light-transmitting window opening 30x may be formed by assembling an L-shaped device and an inverted L-shaped device in a rectangular frame shape. The refrigerant evaporator 70 having the light-transmitting window opening 70x is not limited to a square frame, but may be a circular frame.
[0076]
(Application example)
FIG. 10 shows an application example in which each embodiment described above is applied to an example of a projector device. As shown in FIG. 10, the projector device includes a light source 100, a diffusion plate 101, reflection plates 102, 106, 107, spectral plates 103, 104, 105, three liquid crystal panels 5, and each liquid crystal panel 5. It has three polarizing plates 6 facing each other, a prism 200, a light projecting lens 201, and a housing 202 for accommodating these optical components.
[0077]
The spectral plates 103, 104, and 105 are also referred to as dilock mirrors. In FIG. 10, R indicates an optical path of light having a red wavelength. G indicates an optical path of light having a green wavelength. B indicates an optical path of light having a blue wavelength.
[0078]
The prism 200 is for synthesizing red light, green light, and blue light, and is arranged in the central area of the three liquid crystal panels 5. The combined light combined by the prism 200 is projected outside in the direction of the arrow W1 via the projection lens 201.
[0079]
KA shown in FIG. 10 indicates a portion according to the above-described embodiment. In this application example, the liquid crystal panel 5 and the polarizing plate 6 are cooled by the heat conductive member (not shown in FIG. 10) according to the above-described embodiment.
[0080]
The diffusion plate 101, the spectral plates 103, 104 and 105, and the reflective plates 102, 106 and 107 are also optical components. Therefore, at least one of the diffusing plate 101, the spectral plates 103, 104, 105, and the reflecting plates 102, 106, 107 is disposed directly on the heat conducting member, and the heat conducting member is cooled by a cooling means (Peltier). It may be cooled by an element device or a heat pipe).
[0081]
(Other examples)
According to the above-described first embodiment, the first to third heat conducting members 11 to 13 are square, but may be circular or elliptical. The light-transmitting window openings 21 to 23 of the first to third heat-conducting members 11 to 13 are square, but may be circular or elliptical.
[0082]
The periphery of the light-transmitting window openings 21 to 23 of the first heat conductive member 11 to the third heat conductive member 13 is surrounded by the first heat conductive member 11 to the third heat conductive member 13. The invention is not limited thereto, and the light-transmitting window openings 21 to 23 of the first to third heat conductive members 11 to 13 may have a notch in the circumferential direction. Instead of the liquid crystal panel 5, another display such as an EL panel may be used.
[0083]
In addition, the present invention is not limited to only the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention. The following technical idea can be understood from the above description.
(Additional Item 1) A heat pipe comprising a frame-shaped refrigerant evaporator having a light-transmitting window opening penetrating in a thickness direction. When the heat pipe is arranged in the optical path of the optical system component, the optical system component can be cooled while securing the optical path.
(Additional Item 2) A heat pipe having a frame-shaped refrigerant evaporating portion having a light-transmitting window opening that penetrates in a thickness direction and to which an optical system component is attached. When the heat pipe is arranged in the optical path of the optical system component, the optical system component can be cooled while securing the optical path.
(Additional Item 3) A Peltier element device having a frame shape having a light-transmitting window opening that penetrates in a thickness direction and to which an optical system component is attached. When the Peltier device is arranged in the optical path of the optical system component, the optical system component can be cooled while securing the optical path.
[0084]
【The invention's effect】
According to the present invention, it is possible to provide an image device and a Peltier device that can effectively cool an optical system component by efficiently cooling the optical system component by a heat conducting member.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a heat conducting member having a light-transmitting window opening (before an optical system component is attached) according to a first embodiment.
FIG. 2 is a front view showing a state in which a Peltier element device and a heat sink are provided on a heat conductive member having a light-transmitting window opening.
FIG. 3 is a perspective view showing a state in which a Peltier element device and a heat sink are mounted on a heat conducting member in which a liquid panel and a polarizing plate are attached to a light-transmitting window opening according to the first embodiment.
FIG. 4 is a cross-sectional view of a main part of a heat conductive member in which a liquid panel and a polarizing plate are attached to a light-transmitting window opening.
FIG. 5 is a perspective view showing a state where a Peltier element device and a heat sink are mounted on a heat conducting member having a liquid crystal panel and a polarizing plate attached to a light-transmitting window opening according to the second embodiment.
FIG. 6 is a perspective view showing a state in which a Peltier element device and a heat sink are mounted on a heat conducting member in which a liquid panel and a polarizing plate are attached to a light-transmitting window opening according to the third embodiment.
FIG. 7 is a perspective view showing a state in which a Peltier element device and a heat sink are mounted on a heat conducting member having a liquid crystal panel and a polarizing plate attached to a light-transmitting window opening according to the fourth embodiment.
FIG. 8 is a perspective view showing a state in which a Peltier element device and a heat sink are mounted on a heat conducting member having a liquid crystal panel and a polarizing plate attached to a light-transmitting window opening according to the fifth embodiment.
FIG. 9 is a perspective view showing a state in which a liquid panel and a polarizing plate are attached to a light-transmitting window opening of a heat conducting member formed by a Peltier device according to a sixth embodiment.
FIG. 10 is a conceptual diagram of a projector device according to an application example.
[Explanation of symbols]
In the figure, 1 is a heat conducting member, 2 is a light-transmitting window opening, 3 is a Peltier element device (cooling means), 5 is a liquid crystal panel (optical component), and 6 is a polarizing plate (optical component).

Claims (6)

In an image device having an optical system component arranged in an optical path through which light for forming an image passes,
A heat conductive member formed of a material having heat conductivity, and cooling means for cooling the heat conductive member,
An image apparatus, wherein at least a part of the optical system component is disposed on the heat conducting member, and is cooled by the cooling means via the heat conducting member. In an image device having an optical system component arranged in an optical path through which light for forming an image passes,
A heat conductive member formed of a material having heat conductivity having a light-transmitting window opening capable of transmitting light, and cooling means for cooling the heat conductive member,
At least a part of the optical system component is disposed on the heat conductive member so as to face the light transmitting window opening of the heat conductive member, and is cooled by the cooling unit via the heat conductive member. An imaging device, comprising: 3. The optical system component according to claim 1, wherein a plurality of the optical system components are provided, one optical system component is disposed on one surface of the heat conductive member, and the other optical system component is the heat conductive member. An image apparatus, wherein the image apparatus is disposed on the other side of the image forming apparatus. 3. The heat conduction member according to claim 1, wherein a plurality of the optical system components are provided, and the heat conduction member is a first heat conduction component including at least one optical system component among the plurality of optical system components. A member and a second heat conductive member provided with another optical system component of the plurality of optical system components,
The image forming apparatus according to claim 1, wherein a cooling ability of the second heat conducting member is set to be larger than a cooling ability of the first heat conducting member. The image apparatus according to claim 1, wherein the cooling unit is at least one of a Peltier device, a heat pipe, and a refrigerator. A Peltier device comprising a frame having a light-transmitting window opening penetrating in a thickness direction.

Images