A general architecture that implements the various features of the invention will now be described with reference to the drawings. The drawings and the associated descriptions are provided to illustrate embodiments of the invention and not to limit the scope of the invention.
Various embodiments according to the invention will be described hereinafter with reference to the accompanying drawings. In general, according to one embodiment of the invention, there is provided a projection type display device, including:
a lamp unit having a lamp holder for holding a lamp;
a power source unit for supplying a power to each of internal constituent elements;
a duct defined on an outside surface of the lamp holder of the lamp unit; and
a common cooling fan for supplying a cooling medium to each of the power source unit and the lamp unit.
In addition, according to one embodiment of the invention, there is provided a projection type display device, including:
a lamp unit having a lamp holder for holding a lamp, a cooling hole through which a cooling medium is caused to circulate in order to cool the lamp being formed in the lamp holder;
a power source unit for supplying a power to each of internal constituent elements;
a duct defined on an outside surface of the lamp holder of the lamp unit to communicate with the cooling hole; and
a common cooling fan for supplying the cooling medium to each of the power source unit and the duct of the lamp unit.
According to the projection type display device of the invention, when the cooling fan is driven, the power source unit is cooled and the air is caused to circulate in the duct. Also, since the duct is defined on the outside surface of the lamp holder, the heat exchange is performed between the air being caused to circulate in the duct and the lamp holder, whereby the circulating air takes the heat away from the lamp holder. As a result, it is possible to obtain the operation for cooling the ambient atmosphere or the like of the lamp held by the lamp holder, and the lamp holder as well as the cooling of the lamp holder.
In addition, it is unnecessary to distribute the air sent out from the cooling fan to the power source unit and the lamp unit. As a result, the flow rate of the air caused to flow into the power source unit through the distribution is prevented from being reduced as in conventional device, and thus one cooling fan can sufficiently cool the power source unit.
In addition, according to one embodiment of the invention, there is provided a method of cooling a lamp unit, including the steps of:
supplying a cooling medium to a power source unit disposed in a projection type display device; and
supplying the cooling medium passed through the power source unit to an outside surface of a lamp holder disposed in the projection type display device.
According to the invention, the efficiency enough to cool the power source unit can be ensured without increasing the number of components or parts such as the cooling fan, and thus the lamp unit can be exactly cooled.
As shown in
A light emitted from the light-emitting tube 41 is condensed by the reflector 42 and unnecessary radiations such as an infrared radiation and an ultraviolet radiation are filter by a filter. After this, the resulting light is spectrally diffracted into an R light, a G light and a B light by a condenser lens, a reflecting mirror, a dichroic mirror and the like. After the resulting R light, G light and B light obtained through the spectral diffraction penetrate through a liquid crystal panel for R, a liquid crystal panel for G, and a liquid crystal panel for B, respectively, they are optically multiplexed by a dichroic prism and the like, and the resulting image light obtained through the optical multiplexing is projected on a screen or the like by a projection lens 5.
As shown in
As shown in
As shown in
Although the air passed through the power source unit 3 is higher in temperature than the ambient atmosphere due to the heat exchange, it has an enough low temperature for each of the lamp holder 44 and the lamp 43, and thus the cooling effect is obtained.
Specifically, the power source cooling fan 6 rotates with a direction of inflow of the air from the power source unit 3 (a longitudinal direction in
As shown in
The duct defining portion 7a of the guiding member 7 has a bending section 7b which is formed continuously with the first outflow port 71 and which bends right backward, and an extension section 7c which straight extends backward from the bending section 7b. The duct defining portion 7a is formed with its lower surface being released so as to form an upper wall 8a, a left wall 8b and a right wall 8c of the duct 8. In this embodiment, the duct defining portion 7a is disposed slightly apart from an upper surface 44a of the lamp holder 44, so that the air slightly flows out through the duct 8. Here, a lower side of the extension section 7c on the bending section 7b side is formed in the form of a stepped portion 7e when viewed from the side face. The stepped portion 7e abuts against a corresponding corner portion of the lamp holder 44, thereby positioning the guiding member 7 and the lamp holder 44 in place. In addition, the guiding member 7 has a plate portion 7d which is formed continuously with the right wall 8c of the extension section 7c, and which guides the air flowed out through the first outflow port 72 to the exhaust port 2b.
As shown in
In addition, the embodiment described above has shown that the upper surface 44a of the lamp holder 44, as shown in
In addition, as shown in
As shown in
After the air flowed into the lamp holder 44 flows out in front of the lamp holder 44 via the surface of the reflector 42 within the lamp holder 44, it meets the air flowed out from the second outflow port 72 described above and flows out to the outside of the projection type display device 1 through the exhaust ports 2b formed in the right wall of the device main body 2. In this embodiment, an exhaust fan 10 is provided on this side of the exhaust ports 2b, and the air is discharged to the outside of the projection type display device 1 with the assistance of the exhaust fan 10.
As shown in
In addition, the lamp unit 4 side (front side) of the box 91 is opened, and this opening is closed by a closing member 95. The ballast cooling fan 94 is a sirocco fan and sends the air to the lower side of the box 91. The closing member 95 includes a closing portion 95a for closing the front of the box 91, and a plate-like partitioning portion 95b for partitioning the inside of the box 91 into upper and lower parts. A projecting plate portion 95c which projects upward is formed in the closing portion 95a. In this embodiment, the box 91 is lower in height than the duct 8, so that the rear end of the duct 8 is closed by the projecting plate portion 95c.
The air sent out from the ballast cooling fan 94 is caused to circulate in a right-hand direction in a lower side of the partitioning portion 95b. A plurality of air blasting holes 95d are formed in the partitioning portion 95b, and the air enters the upper side of the partitioning portion 95b through the individual air blasting holes 95d. Here, the air blasting holes 95d are formed so as to overlap in position the heating elements 92b, respectively, when viewed from the upper surface. Thus, the air entered the upper side of the partitioning portion 95b is brown to the individual heating elements 92b.
A plurality of exhaust holes 91b through which the air in the upper side of the partitioning portion 95b in the box 91 is discharged are formed in the upper surface of the box 91. Moreover, communication holes 95e through which the upper side of the partitioning portion 95b in the box 91 communicates with the lamp unit 4 side are formed in the closing portion 95a. The air which has taken the heat away from each of the heating elements 92a is discharged to the outside of the lamp ballast 9 through the exhaust ports 91b and the communication holes 95e.
Specifically, the two communication holes 95e are provided in parallel on the left-hand and right-hand sides, respectively, and are formed so as to overlap in position the light-emitting tube 41 of the lamp 43 when viewed from the front. As a result, the air which has flowed out through the communication holes 95e performs the heat exchange with the light-emitting tube 41.
In the projection'type display device 1 constructed in the manner as described above, when the power source cooling fan 6 is driven, the power source unit 3 is cooled and the air is caused to circulate in the duct 8. Also, since the lower surface of the duct 8 is defined by the lamp holder 44, when the air is caused to circulate in the duct 8, the heat exchange is performed between the circulating air and the lamp holder 44 so that the circulating air takes the heat away from the lamp holder 44. As a result, it is possible to obtain the operation for cooling the ambient atmosphere or the like of the lamp 43 held by the lamp holder 44, and the lamp holder 44 as well as the cooling for the lamp holder 44. In addition, since the duct defining portion 7a is disposed slightly apart from the upper surface 44a of the lamp holder 44, the ambient atmosphere is cooled by the air as well which slightly flows out through the duct 8.
In addition, in this embodiment, the air which is caused to circulate in the lamp unit 4 is turned up, so that the lamp holder 44 is cooled and the reflector 42 of the lamp 43 is also cooled. Therefore, the extremely satisfactory efficient of the heat exchange is obtained.
In addition, the air circulated by the power source cooling fan 6 is not divided into the power source unit 3 and the lamp unit 4, so that the air-sending ability of the power source cooling fan 6 can be displayed to the maximum extent. Also, since the air is distributed to the first outflow port 71 and the second outflow port 72 by the guiding member 7, only a quantity of air required to cool the lamp unit 4 can be caused to circulate to the duct 8 side. As a result, the lamp unit 4 can be prevented from being overcooled. Therefore, the quantity of air caused to circulate in the power source unit 3 due to the distribution can be prevented from being reduced as in the conventional device. Also, the necessary air quantity can be sent out to the lamp unit 4, and thus the power source unit 3 and the lamp unit 4 can be exactly cooled by one power source cooling fan 6.
Note that, although the embodiment described above has shown that the air caused to flow out to the lamp unit 4 side is distributed, it is to be understood that the entire air may also be caused to flow out to the lamp unit 4 side.
In addition, the embodiment described above has shown that the circulating air is turned up forward and backward once in the lamp unit 4. However, the circulating air may also be turned up plural times to increase the circulation path of the air. In this case as well, the efficiency of the heat exchange is enhanced.
In addition, the embodiment described above has shown the duct 8 which is defined to have the rectangular shape in cross section. However, it is to be understood that the duct 8 may also be defined to have a round shape or the like in cross section. Moreover, it is to be understood that the construction relating to whether or not the exhaust fan 10 is provided, and the shape, material, etc. of the lamp holder 44 are also arbitrarily determined, and other concrete constructions or the like of the details can also be suitably changed.
It should be noted that the present invention is not limited to the embodiments described above, and the various combinations and changes may be made without departing from or changing the technical idea of the present invention.
Number | Date | Country | Kind |
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2006-171947 | Jun 2006 | JP | national |