JP2009157134A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector device equipped with a cooling mechanism, capable of suppressing temperature rise of a motor part for driving a cooling fan for cooling a light source unit, even when the light source unit is cooled by using exhaust type cooling. <P>SOLUTION: Separately from a first duct comprising a lamp house for cooling the light source unit, the projector device is provided with a second duct for directly guiding cold air outside the lamp house to the motor part of the cooling fan for cooling the light source unit. One end of the duct which is not an opening on the cooling fan side is made to open to the outside air of the projector device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for providing a projector device.

  Conventionally, illumination light emitted from a light source unit that uses a discharge lamp such as a high-pressure mercury lamp (hereinafter abbreviated as “lamp”) as a light source is modulated with a light valve such as a liquid crystal panel to produce an optical image (video). There is known a projector device that forms and projects an enlarged image on a screen or the like.

  A lamp used in a projector device generates a large amount of heat in the process of emitting light, and is usually cooled using a cooling fan. This cooling fan is arranged close to the lamp in order to enhance the cooling effect of the lamp and to reduce the size of the projector device. For this reason, the temperature of the motor unit that rotates the impeller unit (blade unit, blade unit) of the cooling fan rises due to radiant heat from the lamp and suction of hot air heated by the lamp.

  The motor unit includes a motor that rotates the impeller unit and a drive circuit that drives the motor. When the temperature rises, for example, evaporation of lubricating oil on the motor shaft, IC used in the drive circuit, etc. There is a concern of causing deterioration and destruction. Therefore, the projector device is provided with a cooling mechanism for cooling the motor unit. An example thereof is disclosed in Patent Document 1.

JP 2006-133649 A

  In Patent Document 1, as shown in FIG. 3, a cooling unit is provided between the cooling fan and the lamp so as to cover the motor unit, and the cooling unit is opposed to the motor unit between the motor unit and the lamp. An air flow portion arranged with a gap through which air can flow between the motor portion and a part of the air flow portion are integrally connected to the motor portion and opposed to a part of the rotation region of the impeller portion. The air flow is formed by a part of or entirely of the air introduction part inclined toward the impeller part with respect to the air flow part, and protrudes from the surface on the impeller part side and extends in the radial direction of the impeller part. Disclosed is a cooling mechanism including a rectifying unit.

  Patent Document 1 has the above-described configuration to block the radiant heat from the lamp at the cooling unit, take in part of the airflow generated at the impeller unit at the air introduction unit, and send it to the gap between the air flow unit and the motor unit, The motor part can be cooled by airflow.

  By the way, there are roughly two types of cooling methods using a cooling fan. One is that air flow (wind) generated by a fan that cools a heat source (in this case, a lamp) by blowing low temperature air (hereinafter referred to as a “blow cooling fan”) is blown onto a lamp reflector, for example, to exchange heat. This is a cooling system that discharges hot air (hot air) so as to push it out of the projector apparatus (hereinafter, this cooling system is referred to as “blow-type cooling” for convenience).

  The other is a device that forcibly generates wind with a cooling fan for exhaust (hereinafter referred to as “exhaust cooling fan”) and sucks out hot air (hot air) that is heat-exchanged on the surface of the lamp reflector, for example. This is a cooling method for exhausting outside (hereinafter, this cooling method is referred to as “exhaust cooling” for convenience).

  In the former method, it cannot be said that the hot air that has undergone heat exchange is reliably discharged from the predetermined exhaust port to the outside of the device, and a part of the hot air flows to the inside of the device without being discharged outside the device and raises the temperature inside the device. There is a risk of indirectly impairing the reliability of other optical components having a low allowable temperature (for example, a polarizing plate, a liquid crystal panel, etc.). Of course, if the hot air flowing inside the apparatus directly hits an optical component having a low allowable temperature, the reliability is greatly lowered. The latter method forcibly exhausts air so that hot air can be reliably exhausted.

  Therefore, a case where the above-described exhaust cooling that can exhaust hot air reliably is used will be considered. In this case, even if the cooling mechanism (cooling unit) of Patent Document 1 is applied to lower the temperature of the motor unit, the temperature of the motor unit may not be lowered for the following reason.

  Patent Document 1 employs blow-type cooling in which low-temperature air (hereinafter referred to as “cold air”) is blown and sucked by a cooling fan, and the sucked cool air is blown to a lamp. That is, the motor unit and the lamp are cooled with cold air. However, in the exhaust type cooling, for example, air (hot air) whose temperature has been increased by heat exchange with a reflector is sucked by the exhaust cooling fan and exhausted outside the apparatus. That is, hot air passes through the cooling fan. Therefore, even if the cooling unit (cooling mechanism) described in Patent Document 1 is arranged between the motor unit and the lamp, there is a problem that the temperature of the motor unit does not decrease because hot air passes through the air flow unit.

  The present invention has been made in view of the above problems, and its purpose is to reduce the temperature rise of a motor unit that drives a cooling fan for cooling a light source unit even when the light source unit is cooled using exhaust cooling. It is an object of the present invention to provide a projector device including a cooling mechanism that can be used.

  In order to solve the above-described problems, in the projector device according to the present invention, the cooling fan disposed in the vicinity of a lamp or the like as a heat source, in particular, a motor that affects reliability and a temperature of a driving circuit portion are locally lowered to drive the projector. The temperature of the cooling fan is adjusted so that the operating temperature environment is adjusted. Focusing on the fact that the upper limit of the guaranteed temperature of the motor unit and motor drive circuit unit is relatively lower than the heat-resistant temperature of the housing and impeller unit of the cooling fan. This is because it can be used.

  Specifically, a configuration is provided in which a small duct that sucks air (or atmosphere) or outside air in the projector device at a relatively low temperature is provided in the vicinity of the motor unit on the heat source side of the cooling fan. In the operation to be performed, low temperature air that is not hot air is sucked in the vicinity of the motor unit and the surface is covered with a low temperature air layer.

  Also, a configuration is proposed in which an auxiliary cooling fan is connected to one end of the duct for supplying the low-temperature air so that low-temperature air can be forcibly sent.

  Alternatively, the above configuration will be described in other expressions below. In a projector apparatus having at least a light source unit with a high heat generation source including a high pressure mercury lamp and a cooling fan provided with a motor for driving a fan for exhausting the high heat generation source or an atmosphere around the high heat generation source. A duct for sucking the atmosphere around the motor unit is provided to reduce the temperature rise of the motor.

  Further, one end of the duct that is not the opening on the cooling fan side is open to the outside air of the projector device so as to suck the atmosphere outside the projector device.

  In addition, an air blower is provided at one end of the duct that is not the cooling fan side opening, and air is blown by the air blower.

  According to the present invention, in addition to the first duct constituted by the lamp house for cooling the light source unit, the second atmosphere for guiding the atmosphere and cool air outside the lamp house to the motor part of the cooling fan for cooling the light source unit. Since the duct is provided, the motor part of the cooling fan can be cooled by the atmosphere outside the lamp house and the cool air while blocking the radiant heat from the light source unit by the second duct. Therefore, the temperature rise of the motor unit that drives the cooling fan can be reduced.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings. Note that components having common functions are denoted by the same reference symbols throughout the drawings, and repeated descriptions of those described once are omitted to avoid complication. In the following description, a liquid crystal projector apparatus using a liquid crystal panel as a typical projector apparatus (hereinafter simply referred to as “projector apparatus” unless doubt arises) will be described as an example.

  A first embodiment according to the present invention will be described below.

  FIG. 1 is a schematic plan view of the projection optical system of the projector apparatus according to the present embodiment as viewed from above. FIG. 2 is a perspective view for explaining the internal configuration of the projector apparatus equipped with the projection optical system of FIG. FIG. 3 is a perspective view schematically showing the composite cooling mechanism according to the present embodiment relating to the light source unit. FIG. 4 is a plan view of the horizontal cross section of FIG. 3 as viewed from above.

  First, a schematic configuration of a projection optical system mounted on the projector apparatus according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 1, the projection optical system is designed to make the illuminance distribution of the light from the light source unit 3 and the light source unit 3 uniform (uniform) and color-separate the liquid crystal panel 6 (light valve element). 6R, 6G, 6B) and the optical optics / color separation unit 4 that irradiates the liquid crystal panel 6 (6R, 6G, 6B) and the optical image formed by the light combining prism 8 and projected by the projection lens 9. It consists of unit 5.

  The light source unit 3 reflects a light beam from the lamp 3a, which is a white lamp such as an ultra-high pressure mercury lamp, a metal halide lamp, a xenon lamp, a mercury xenon lamp, a halogen lamp, and the like, converts it into parallel light, and emits it. The reflector 3b has a circular or polygonal exit opening.

  The light from the light source unit 3 passes through, for example, a liquid crystal panel 6 (6R, 6G, 6B) that is a light valve element, travels toward the projection lens 9, and is projected onto a screen (not shown). The projection optical system refers to the entire optical system from the light source unit 3 to the projection lens 9.

  The light emitted from the lamp 3a is reflected by, for example, a parabolic reflector 3b, becomes parallel to the optical axis, and enters the illumination optical / color separation unit 4. The light incident on the illumination optical / color separation unit 4 first enters the first array lens 403. The first array lens 403 divides incident light into a plurality of lights by a plurality of lens cells arranged in a matrix, and efficiently guides the light to pass through the second array lens 404 and the polarization conversion element 405. That is, the first array lens 403 is designed so that the lamp 3a and each lens cell of the second array lens 404 have an object-image relationship (conjugate relationship) with each other.

  Similar to the first array lens 403, the second array lens 404 having a plurality of lens cells arranged in a matrix form has the shape of the lens cell of the first array lens 403 corresponding to each of the constituting lens cells as a liquid crystal panel. 6 (6R, 6G, 6B). At this time, the light from the second array lens 404 is aligned in a predetermined polarization direction by the polarization conversion element 405, and the projection images of the lens cells of the first array lens 403 are the condensing lens 406 and the condenser lens, respectively. 413, 414, the first relay lens 415, the second relay lens 416, and the third relay lens 417 are superimposed on each liquid crystal panel 6 (6R, 6G, 6B).

  The second array lens 404 and the condensing lens 406 disposed in the vicinity of the first array lens 403 and the liquid crystal panel 6 (6R, 6G, 6B) have an object-image relationship ( The light beam divided into a plurality by the first array lens 403 is placed on the liquid crystal panel 6 (6R, 6G, 6B) by the second array lens 404 and the condenser lens 406. Therefore, it is possible to illuminate with a highly uniform illuminance distribution at a level with no practical problem.

  In the process, for example, B light (blue band light) is reflected by the dichroic mirror 411, and G light (green band light) and R light (red band light) are transmitted and separated into two colors of light. Further, the G light and R light are separated into G light and R light by the dichroic mirror 412. For example, the G light is reflected by the dichroic mirror 412 and the R light is transmitted through the dichroic mirror 412 and separated into three colors. There are various ways of separating the light, and the dichroic mirror 411 may reflect the R light and transmit the G light and B light, or may reflect the G light and transmit the R light and B light. Good.

  Here, the B light is reflected by the dichroic mirror 411, reflected by the reflecting mirror 410, and enters the prism unit 5 through the condenser lens 413. Of the G light and R light transmitted by the dichroic mirror 411, the G light is reflected by the dichroic mirror 412 and enters the prism unit 5 through the condenser lens 414. Further, the R light is transmitted through the dichroic mirror 412, collected by the first relay lens 415, reflected by the reflection mirror 408, collected by the second relay lens 416, reflected by the reflection mirror 409, and then third. The light is condensed by the relay lens 417 and enters the prism unit 5.

  The prism unit 5 includes an R-light liquid crystal panel 6R, a G-light liquid crystal panel 6G, and a B-light liquid crystal panel 6B on the three adjacent surfaces of the light combining prism 8, respectively, on the incident-side polarizing plates 7a (7aR, 7aG, 7aB), It is mounted together with the output side polarizing plate 7b (7bR, 7bG, 7bB), and the projection lens 9 is mounted on the remaining surface.

  The B light, G light, and R light incident on the prism unit 5 are converted into optical images corresponding to video signals (not shown) while passing through the incident-side polarizing plate 7a, the liquid crystal panel 6, and the outgoing-side polarizing plate 7b for each color light. After being converted and synthesized as a color image by the light synthesizing prism 8, the light passes through a projection lens 9 such as a zoom lens and reaches a screen (not shown). The optical image formed by the light intensity modulation on the liquid crystal panels 6R, 6G, and 6B is enlarged and projected on the screen by the projection lens 9, and functions as a display device.

  In FIG. 1, no relay lens is used for the first optical path (B light) and the second optical path (G light), but B light, G light, and the optical path length are used for the third optical path (R light). A relay lens is used to equalize. Further, the first array lens 403, the second array lens 404, the condenser lens 406, etc. constitute a so-called known optical integrator.

  The incident side polarizing plate 7a, the outgoing side polarizing plate 7b, and the liquid crystal panel 6 generate heat by the light that does not pass through. Since these optical components (light modulation elements) have a low allowable temperature, they are cooled using the cooling fan 70. The low-temperature air (cold air) taken in from the intake port (not shown) by the cooling fan 70 through the dust collection filter (not shown) is rectified by a duct (not shown) to be cooled air 71, and is incident on the polarizing plate 7a (7aR). , 7aG, 7aB), the emission side polarizing plate 7b (7bR, 7bG, 7bB) and the liquid crystal panel 6 (6R, 6G, 6B) to cool them.

  Further, as described above, the light source unit 3 is a unit that emits the light emitted from the lamp 3a to the illumination optical / color separation unit 4. However, when the electric power is converted into light, heat loss occurs in the lamp 3a. In addition, for example, infrared or ultraviolet radiation components other than the visible light component emitted from the lamp 3a are absorbed by the reflector 3b, resulting in a very high temperature. Therefore, the cooling fan 10 is used to generate a flow of air and atmosphere (wind), and heat exchange is performed on the surface of the reflector 3b with the wind, for example. And let it cool.

  There are two types of cooling. One is blowing type cooling in which the air and atmosphere flow (wind) sucked by the intake cooling fan are blown to the reflector 3b, and the heat-exchanged high-temperature wind (hot air) is discharged outside the apparatus. The other is exhaust-type cooling in which air is generated by an exhaust cooling fan, and hot air and atmosphere (hot air) exchanged in heat at the surface of the reflector 3b are sucked and forced out of the apparatus.

  In the present embodiment, the latter type of exhaust cooling that can reliably exhaust hot air is employed. That is, using the cooling fan 10 for exhaust, as indicated by an arrow 120, hot air whose temperature has been increased by heat exchange in the optical unit 3 is exhausted outside the apparatus.

  Next, a projector apparatus in which the above-described projection optical system is mounted on a housing will be described with reference to FIG.

  As shown in FIG. 2, in the projector device 1, the projection optical system is arranged based on the arrangement of FIG. 1, which is a plan configuration diagram of the projection optical system.

  That is, the projector apparatus 1 receives power supply from the power supply unit 2 disposed on the left front side in FIG. 2, and emits substantially white light from the light source unit 3 disposed on the rear side on the left side in FIG. The light enters the illumination optical / color separation unit 4 arranged on the rear side of the paper. The illumination optical / color separation unit 4 makes the illuminance distribution of the white light incident from the light source unit 3 uniform, aligns the polarization direction to a predetermined polarization direction, and further separates into three color lights (R light, G light, and B light). Then, the liquid crystal panel is irradiated. The R, G, B light from the illumination optical / color separation unit incident on the prism unit 5 disposed on the right side of the center of FIG. 2 is modulated in light intensity by each liquid crystal panel 6 to form an optical image of each color light. The incident-side polarizing plate 7a and the outgoing-side polarizing plate 7b increase the color purity and contrast, and are combined with the image light by the light combining prism 8, and are enlarged and projected from the projection lens 9.

  Next, the cooling mechanism according to the present embodiment will be described with reference to FIGS. Before that, some problems of the prior art will be explained. In FIG. 3, the upper surface of the lamp house is omitted in order to make the cooling mechanism easy to understand.

  In the projector device 1, the light source unit 3 becomes very hot as described above. For this purpose, air cooling in which the light source unit is cooled by a cooling fan is generally used. As shown in FIGS. 3 and 4, the cooling structure is such that the light source unit 3 is housed in a lamp house 101 having a substantially hermetically sealed structure and is opened on two opposing surfaces of the lamp house 101 facing the side surfaces of the light source unit 3. A configuration of the duct 100 is generally used in which (for example, a plurality of slits or small holes) is provided, one of which is the intake port 101a and the other is the exhaust port 101b.

  In order to increase the cooling efficiency, the light source unit 3 housed in the lamp house 101 is disposed at the corner of the projector device 1, and the exhaust port 101 b side of the lamp house 101 is directed toward the outer case 200 side of the housing, An exhaust cooling fan 10 is provided between the opening 101b and the outer case 200 so that the high-temperature air (hot air 19) in the lamp house 101 is reliably discharged out of the apparatus. Needless to say, a plurality of exhaust holes 201 for exhaust are provided near the cooling fan 10 of the outer case 200.

  In the case of the exhaust-type cooling having such a configuration, as shown in FIG. 4, hot air 19 generated by heat exchange in the light source unit 3 passes through the impeller portion 13 where the cooling fan 10 rotates. At this time, the motor unit 14 having a low allowable temperature with respect to heat is exposed to hot air, and the temperature of the motor unit 14 increases. The motor unit 14 includes a motor 14a that rotates the impeller unit 13 and a drive circuit unit 14b that drives the motor 14a. When the temperature of the motor unit 14 becomes high, for example, there is a concern that a motor shaft (not shown) of the motor 14a is seized, a driving IC (not shown) mounted on the driving circuit unit 14b is deteriorated or destroyed. Therefore, the temperature of the motor unit 14 must be set to be equal to or lower than the allowable temperature of the cooling fan 10 determined by the upper temperature limit value of the motor unit 14. However, in recent years, downsizing and high brightness are desired, and it is not easy to keep the temperature of the motor unit 14 within an allowable temperature.

  In order to solve the above-described problems, in this embodiment, apart from the first duct 100 configured using the lamp house 101, low-temperature air (cold air 18) having a relatively low temperature outside the lamp house 101. A special second duct is also provided to cool the air by directly sucking the air and supplying it to the motor unit 14 to cool it, thereby providing a composite cooling mechanism.

  Next, the composite cooling mechanism of the first embodiment will be described.

  As shown in FIG. 3, which is a perspective view schematically showing the composite cooling mechanism, this embodiment is separate from the first duct 100 that forms the flow path of the cool air that cools the light source unit 3 and the hot air after heat exchange. The motor unit 14 of the cooling fan 10 includes a low-temperature intake duct 11 as a second duct for sending cool air, and constitutes a composite cooling mechanism.

  Hereinafter, the cooling action of the composite cooling mechanism will be described with reference to FIG. 4 which is a plan view in a horizontal section of the perspective view of FIG.

  As described above, the duct 100 is configured by the lamp house 101 having a substantially hermetically sealed structure that houses the light source unit 3, and the air inlet 101 a is provided on one of the two opposing surfaces of the lamp house 101 that faces the side surface of the light source unit 3. The other is provided with an exhaust port 101b. Accordingly, for example, cold air (not shown) that flows into the lamp house 101a from the air inlet 101 as indicated by the arrow 121 along with the exhaust of the cooling fan 10 is heat-exchanged by the reflector 3b to become hot air 19, for example. The hot air 19 mainly passes through the impeller portion 13a on the outer peripheral side of the cooling fan 10 as indicated by an arrow 122, but partly passes through the impeller portion 13b on the inner peripheral side near the motor portion 14 as indicated by an arrow 123. To do. Thereby, the temperature of the motor part 14 rises and the concern over the allowable temperature of the cooling fan 10 arises.

  Therefore, a low temperature intake duct 11 is provided. One intake-side end portion 11 a of the low-temperature intake duct 11 is provided outside the duct 100 through the wall surface of the lamp house 101 (however, different from the wall surface on which the cooling fan 10 is installed). It has an opening towards. Here, the intake side end portion 11a sucks air (cold air) having a temperature lower than the allowable temperature of the cooling fan 10 in the projector device 1. In this way, the intake side end portion 11a is isolated from the exhaust portion 17 from which the hot air 19 on the exhaust side of the lamp house 101 and the cooling fan 10 has been exhausted, so that it is possible to intake cool air.

  The other air supply side end portion 11b of the low temperature intake duct 11 is provided in the lamp house 101 so as to block the radiant heat from the light source unit 3 in the vicinity of the motor portion 14 of the cooling fan 10 on the side wall of the low temperature intake duct 11. And opens toward the motor unit 14. Further, as is apparent from FIG. 4, the opening size of the air supply side end portion 11 b is slightly larger than the diameter of the motor unit 14, for example, a circular shape similar to the planar view shape of the motor unit 14. . Accordingly, the turning of the inner peripheral impeller portion 13 b prevents the hot air 19 in the lamp house 101 from passing near the surface of the motor portion 14 as indicated by the arrow 123.

  As the projector apparatus 1 is driven, the light source unit 3 is turned on and begins to generate heat. At the same time, the cooling fan 10 starts to be driven, and the impeller unit 13 cools the light source unit 3 from, for example, the reflector 3b side, starts to rotate the hot air 19 whose temperature has risen in the lamp house 101, and exhausts it outside the projector device 1. At this time, as the inner peripheral side impeller portion 13b in the vicinity of the motor 14 turns, the motor portion 14 and the inner peripheral side impeller portion 13b are supplied with cold air 18 outside the lamp house 101 from the supply side end portion 11b of the low temperature intake duct 11. Is passed through the surface layer of the motor unit 14 as indicated by an arrow 131.

  Of course, since the opening size of the air supply side end portion 11b is slightly larger than the diameter of the motor portion 14, the hot air 19 in the lamp house 101 does not flow as shown by the arrow 123 by the turning of the inner peripheral side impeller portion 13b. When flowing, it passes outside the opening size of the supply side end portion 11b. Thereby, the surface temperature in the vicinity of the motor unit 14 can be continuously driven while maintaining a relatively low temperature, unlike the temperature around the outer peripheral impeller unit 13 b that feeds the hot air 19. Further, by mixing low temperature air having a relatively low temperature on the exhaust side with respect to the hot air around the light source unit 3, a reduction in the exhaust temperature in the exhaust unit 17 can be expected.

  In the above, in the low-temperature intake duct 11 that directly supplies the cool air 18 outside the lamp house 101 to the motor unit 14 of the cooling fan 10 for cooling the light source unit, the supply-side end portion 11 b faces the motor unit 14. Although the opening is assumed, the present invention is not limited to this. For example, for example, hemispherical diverting means 103 that protrudes toward the inside of the opening is provided at the center of the opening, and the diverting means 103 is supported on the side wall of the air supply side end 11b by a thin support member (not shown), for example, in a cross shape. A configuration may be adopted. In this way, since the annular flow path is formed by the flow dividing means 103, the cool air 19 can flow efficiently along the surface layer of the motor unit 14.

  FIG. 5 is a perspective view schematically showing a composite cooling mechanism according to the second embodiment relating to the light source unit.

  The basic configuration of this embodiment is the same as that of the first embodiment. However, the intake-side end 11Aa of the low-temperature intake duct 11A according to the present embodiment is provided in the vicinity of the wall surface of the exterior case 200A and has openings toward the plurality of intake holes 202 provided in the exterior case 200A. is doing. That is, the low temperature intake duct 11 </ b> A is configured to suck the outside air (cold air 30) of the projector device 1. Thereby, the temperature is slightly higher than the outside air due to other electronic components (not shown) in the projector device 1, and the temperature is lower than that of the hot air 19 (cool air 18). The cold air 30) can be sucked into the cold intake duct 11A. This is effective when the temperature reduction effect of the motor unit 14 of the cooling fan 10 is insufficient.

  FIG. 6 is a schematic diagram of the composite cooling mechanism according to the third embodiment relating to the light source unit. FIG. 6A is a perspective view of the composite cooling mechanism, and FIG. 6B is a plan view of the horizontal section of FIG.

  The basic configuration of this embodiment is the same as that of the first embodiment. However, the auxiliary fan 40 is connected to the intake-side end portion 11 a that penetrates the wall surface of the lamp house 101 of the low-temperature intake duct 11 and is provided outside the duct 100 for the purpose of assisting the intake of the cooling fan 11. It is said.

  Thereby, the auxiliary fan 40 can forcibly send the cool air 18 in the projector device 1 through the low temperature intake duct 11 and can cool the motor unit 14 strongly.

  FIG. 7 is a perspective view schematically showing a composite cooling mechanism according to the fourth embodiment related to the light source unit.

  The basic configuration of this embodiment is the same as that of the third embodiment. However, the intake side of the auxiliary fan 40 is connected to the exterior case 200B of the projector apparatus 1, and the configuration is such that the cool air 30 outside the projector apparatus is sucked through the plurality of intake holes 203 provided in the exterior case 200B. It is said that.

  According to the present embodiment, compared to the third embodiment, since the cool air 30 of the outside air is sucked, the motor unit 14 can be further cooled.

FIG. 3 is a schematic plan configuration diagram of the projection optical system of the projector device according to the first embodiment viewed from above. FIG. 2 is a perspective view illustrating an internal configuration in which an upper exterior of a projector apparatus equipped with the projection optical system of FIG. FIG. 3 is a perspective view schematically showing a composite cooling mechanism according to the first embodiment. The top view which looked at the horizontal cross section of FIG. 3 from the upper side. FIG. 6 is a perspective view schematically showing a composite cooling mechanism according to Embodiment 2. FIG. 6 is a schematic diagram of a composite cooling mechanism according to a third embodiment. FIG. 6 is a perspective view schematically showing a composite cooling mechanism according to a fourth embodiment.

Explanation of symbols

1: projector device, 2: power supply unit, 3: light source unit, 3a: lamp, 3b: reflector, 4: illumination optics / color separation unit, 5: prism unit, 6: liquid crystal panel, 7: polarizing plate, 7a: incidence Side polarizing plate, 7b: Emission side polarizing plate, 8: Photosynthesis prism, 9: Projection lens, 10: Cooling fan, 11, 11A: Low temperature intake duct, 11a, 11Aa: Intake side end, 11b: Supply side end , 13: impeller part, 13a: outer peripheral side impeller part, 13b: inner peripheral side impeller part, 14: motor part, 14a: motor, 14b: drive circuit part, 17: exhaust part, 18: cold air, 19: hot air, 30 : Cold air, 40: auxiliary fan, 70: cooling fan, 71: cold air, 100: duct, 101: lamp house, 101a: air inlet, 101b: air outlet, 103: flow dividing means, 120 121, 123: Arrow, 131: Arrow, 200, 200A, 200B: Exterior case, 201: Exhaust hole, 202, 203: Intake hole, 403: First array lens, 404: Second array lens, 405: Polarization conversion element , 406: condenser lens, 408, 409, 410: reflection mirror, 411, 412: dichroic mirror, 413, 414: condenser lens, 415: first relay lens, 416: second relay lens, 417: third relay lens

Claims (8)

A light source unit with a high heat source including a high-pressure mercury lamp,
In the projector device having a cooling fan provided with a motor for driving the fan that exhausts the atmosphere around the high heat source or the high heat source,
Provide a duct to suck in the atmosphere around the motor part of the cooling fan,
A projector apparatus characterized by reducing temperature rise of the motor. The projector device according to claim 1,
One end of the duct that is not the opening on the cooling fan side is open to the outside air of the projector device,
A projector device characterized by sucking an atmosphere outside the projector device The projector device according to claim 1,
A fan is provided at one end of the duct that is not the cooling fan side opening,
A projector device characterized in that air is blown by the blower The projector device according to claim 3, wherein
Open the intake side of the blower to the outside air of the projector device,
A projector device that blows air after sucking an atmosphere outside the projector device Involved in projector devices with light source units with high heat generation such as high-pressure mercury lamps,
In the configuration to cool and heat exhaust the high heat source and the hot air around the high heat source using a cooling fan,
A projector apparatus comprising a low-temperature intake duct capable of locally cooling a motor unit of a cooling fan in order to suppress an increase in temperature of the cooling fan caused by hot air sucked by the cooling fan. The projector device according to claim 1,
One end of the low-temperature intake duct that can locally cool the motor unit of the cooling fan is not open to the cooling fan side, and is open to the outside air of the projector device, and the outside of the projector device can be sucked. Projector device The projector device according to claim 1,
A projector apparatus comprising a blower at one end of the low-temperature intake duct that is capable of locally cooling the motor section of the cooling fan, the opening being not at the cooling fan side opening, and capable of forcing a constant amount of air. The projector apparatus according to claim 7, wherein
A projector device characterized in that the air intake side of the blower device is opened to the outside air of the projector device, and the air outside the projector device is sucked to forcibly blow a certain amount of air.

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