JP2010217284A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector which achieves improvement in cooling efficiency of a lamp. <P>SOLUTION: The projector 1 includes: the lamp 71; a lamp house 72 arranged to surround the lamp 71; a ventilation duct 81 connected to the lamp house 72 and supplying cooling air into the lamp house 72; and an exhaust duct 82 connected to the lamp house 72 and exhausting the cooling air in the lamp house 72 to the outside. A first channel 73 connecting the ventilation duct 81 and the lamp 71 and supplying a portion of the cooling air supplied from the ventilation duct 81 to the lamp 71, and a second channel 76 connecting the ventilation duct 81 and the exhaust duct 82 and exhausting other portion of the cooling air supplied from the ventilation duct 81 to the exhaust duct 82 are formed in the lamp house 72. The lamp 71 has a lamp exhaust port 71D opening to the second channel 76. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector, and more particularly to a projector with improved lamp cooling efficiency.

  2. Description of the Related Art In recent years, with an increase in projector performance, a lamp that is a light source device for a projector is required to have high brightness. In order to meet this demand for higher brightness, a light source having a large amount of light tends to be used for the lamp. Such a light source with a large amount of light often generates a large amount of heat and requires efficient cooling of the lamp.

  On the other hand, in a conventional projector, cooling air is introduced into the housing by an intake blow fan or the like, and after cooling the lamp, the cooling air is discharged to the outside of the housing by an axial fan or the like. The method is generally employed (see, for example, Patent Document 1).

JP 2006-227052 A

  However, in the conventional projector, no consideration is given to efficiently exhausting the air in the lamp (in the reflector). For this reason, considering the recent demand for higher brightness of the lamp, it cannot be said that cooling of the lamp by the conventional method is sufficient, and further improvement in cooling efficiency has been demanded. Further, in the configuration in which the air in the reflector is exhausted by the two fans as in Patent Document 1, there is a problem that the apparatus becomes larger and the exhaust sound becomes louder.

  The present invention meets the above-described requirements, and an object thereof is to provide a projector with improved lamp cooling efficiency.

  A projector according to the present invention includes a lamp, a lamp house arranged so as to surround the lamp, a fan duct connected to the lamp house and supplying cooling air into the lamp house, a lamp house connected to the lamp house, And an exhaust duct for discharging the cooling air inside. In the lamp house, the air duct and the lamp are connected, the first flow path for supplying a part of the cooling air supplied from the air duct to the lamp, the air duct and the exhaust duct are connected, and from the air duct A second flow path for discharging another part of the supplied cooling air to the exhaust duct is formed. The lamp has a lamp exhaust opening that opens to the second flow path.

  In the projector of the present invention, a second flow path for discharging the cooling air supplied from the air duct to the exhaust duct is provided separately from the first flow path for supplying the cooling air supplied from the air duct to the lamp. ing. Furthermore, the lamp has a lamp exhaust opening that opens to the second flow path. Therefore, the cooling air supplied to the lamp through the first flow path and heated by the heat generated by the lamp is efficiently discharged from the lamp exhaust port to the exhaust duct by the action of the cooling air flowing through the second flow path. The As a result, according to the projector of the present invention, since the cooling air is suppressed from staying in the lamp, it is possible to provide a projector with improved lamp cooling efficiency.

  Preferably, in the projector, the wind speed of the cooling air in the second flow path is larger than the wind speed of the cooling air in the lamp exhaust port.

  Thereby, the cooling air heated by the heat generated by the lamp can be discharged to the exhaust duct more efficiently.

  In the projector, the cooling air flow path from the lamp to the outside of the projector may be bent.

  Due to restrictions on the arrangement of the components that make up the projector, the cooling air flow path from the lamp to the outside of the projector is bent, and a structure in which the cooling air cannot be discharged straight out of the lamp is adopted. There is a case. In this case, the cooling of the lamp may be insufficient. In such a case, it is particularly preferable to employ the projector of the present invention in which the lamp cooling efficiency is improved.

  The projector may further include an exhaust port that is connected to the exhaust duct and opens to the outside of the projector. In this case, the exhaust port is preferably arranged in a direction opposite to the irradiation direction of the lamp as viewed from the lamp. Thereby, it can suppress that the light radiate | emitted from the lamp | ramp leaks from an exhaust port.

  As is apparent from the above description, according to the projector of the present invention, a projector with improved lamp cooling efficiency can be provided.

It is a schematic perspective view which shows the external appearance of a projector. It is a schematic perspective view which shows the external appearance of a projector. It is the schematic which shows the structure inside the housing | casing of a projector. It is the schematic which shows the structure of a lamp unit and its periphery. It is the schematic which shows the structure of a lamp unit and its periphery.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  First, an outline of the structure of the projector in the present embodiment will be described. Referring to FIGS. 1 and 2, projector 1 in the present embodiment includes a housing 2 and a projection lens 3 disposed so as to protrude from one surface of housing 2. The housing 2 has a mesh-like structure, an intake port 4 for taking cooling air into the housing, and a mesh-like structure, and an exhaust for discharging cooling air from the housing to the outside. A mouth 5 is formed.

  Referring to FIG. 3, projector 1 is disposed inside housing 2 so as to be opposed to intake port 4 and on the side opposite to intake port 4 as viewed from intake fan 6. A heat pipe 13 and a video chip 12 connected to the heat pipe 13 directly or via a member having high thermal conductivity are provided. Further, the projector 1 includes a plurality of lamp units 7 (two in the case of the present embodiment) disposed inside the housing 2 so as to face the exhaust port 5, and a plurality of lamp units adjacent to the lamp unit 7. A rod integrator lens 8 extending in a direction along the direction in which the rods 7 are arranged, a condenser lens 9 disposed so as to face one end in the longitudinal direction of the rod integrator lens 8, and a rod viewed from the condenser lens 9 A relay lens 10 disposed on the opposite side of the integrator lens 8 and a mirror disposed on the opposite side of the condenser lens 9 as viewed from the relay lens 10 and reflecting light passing through the relay lens 10 toward the video chip 12. 11.

  Next, the structure of the lamp unit 7 and its periphery will be described. 4 and 5, lamp unit 7 included in projector 1 according to the present embodiment includes lamp 71 and lamp house 72 arranged to surround the lamp. The lamp 71 includes a light source 71A and a reflector 71B that covers the light source 71A and has an opening to reflect light from the light source 71A and emit the light from the opening. Further, in the area of the lamp house 72 facing the opening of the reflector 71B, a UV glass 72C is provided that prevents scattering of fragments when the light source 71A is ruptured and removes ultraviolet rays from the light emitted from the light source 71A. ing.

  The lamp house 72 is connected to a blower duct 81 for supplying cooling air into the lamp house 72 and an exhaust duct 82 for discharging the cooling air in the lamp house 72 to the outside. Further, an exhaust chamber 83 having an exhaust fan 84 is connected to the exhaust duct 82. The lamp house 72 and the exhaust duct 82 are arranged adjacent to each other in the Y-axis direction in FIGS. 4 and 5 so as to communicate with each other through the opening 74. Further, the exhaust duct 82 and the exhaust chamber 83 are disposed adjacent to each other in a direction (orthogonal direction) intersecting the direction in which the lamp house 72 and the exhaust duct 82 are arranged, that is, in the Z-axis direction in FIGS. The opening 85 communicates. The exhaust chamber 83 communicates with the outside through an opening 86 that constitutes the exhaust port 5. With such a configuration, the cooling air flow path from the lamp 71 to the outside of the projector 1 is bent. The exhaust port 5 is connected to an exhaust duct 82 via an exhaust chamber 83. The exhaust port 5 is disposed in a direction opposite to the irradiation direction of the lamp 71 when viewed from the lamp 71.

  Further, referring to FIG. 4, a first flow path 73 that connects the air duct 81 and the lamp 71 in the lamp house 72 and supplies a part of the cooling air supplied from the air duct 81 to the lamp 71. And a second flow path 76 that connects the blower duct 81 and the exhaust duct 82 and discharges another part of the cooling air supplied from the blower duct 81 to the exhaust duct 82. That is, at the connection portion between the air duct 81 and the lamp house 72, the air duct 81, which is a cooling air flow path, branches into a first flow path 73 and a second flow path 76 formed in the lamp house 72. is doing. The lamp 71 has a lamp exhaust port 71 </ b> D that opens to the second flow path 76.

  Next, the operation of the projector 1 will be described. Referring to FIG. 3, the light emitted from lamp unit 7 passes through rod integrator lens 8, condenser lens 9 and relay lens 10 along arrow β, and is reflected by mirror 11, thereby being image chip 12. To reach. Then, the video generated in the video chip 12 is projected onto a screen (not shown) or the like through the projection lens 3.

  At this time, the video chip 12, the lamp unit 7 and the like whose temperature is increased by the above operation are cooled as follows. First, when the intake fan 6 rotates, external air is introduced into the housing 2 as cooling air through the intake port 4. The cooling air travels along the arrow α and is blown onto the heat pipe 13. As a result, the video chip 12 is cooled via the heat pipe 13. The cooling air blown to the heat pipe 13 further proceeds along the arrow α, cools the lamp 71 in the lamp unit 7, and then is discharged from the exhaust port 5 to the outside of the housing 2.

Here, the cooling of the lamp 71 will be described in more detail. With reference to FIGS. 4 and 5, the cooling air is supplied to the lamp unit 7 through the air duct 81. The cooling air traveling along the arrow α in the air duct 81 branches into the first flow path 73 and the second flow path 76 when entering the lamp house 72 of the lamp unit 7. The cooling air that has entered the first flow path 73 travels along the arrow α ₁ and is supplied into the lamp 71. Then, the cooling air is blown to the light source 71A to cool the light source 71A, and then discharged from the lamp exhaust port 71D to the outside of the lamp 71.

On the other hand, the cooling air that has entered the second flow path 76 travels along the arrow α ₂ and flows to the exhaust duct 82. At this time, as described above, the lamp exhaust port 71 </ b> D is open to the second flow path 76. That is, the flow path of the cooling air supplied from the air duct 81 branches into the first flow path 73 and the second flow path 76 in the lamp house 72, and the cooling air passing through the first flow path 73 is the light source 71A. After cooling, they merge again and are connected to the exhaust duct 82. Therefore, after cooling the light source 71A, the cooling air exhausted to the outside of the lamp 71 can be efficiently flowed to the exhaust duct 82 by the flow of the cooling air toward the exhaust duct 82 (arrow α ₂ ). The cooling air is discharged (arrow α ₁ ). As a result, the cooling air heated by cooling the light source 71A is efficiently discharged to the outside of the lamp 71, so that the cooling efficiency of the lamp 71 is improved.

  By having the above characteristics, the projector 1 according to the present embodiment has the following excellent effects. That is, since the cooling efficiency of the lamp 71 is improved, a light source having high luminance and a large amount of heat generation can be employed. Therefore, the projector 1 can be a projector with higher brightness. On the other hand, if the lamp 71 having the same luminance as the conventional one and the heat generation amount equivalent to the conventional one is employed, the rotational speed of the exhaust fan 84 can be reduced. Therefore, the projector 1 can be a projector having excellent silence. Further, as described above, the projector 1 is different in the exhaust direction of the cooling air from the lamp house 72 to the exhaust duct 82 and the exhaust direction of the cooling air to the outside by the exhaust fan 84. The flow path of the cooling air toward the outside is bent. Even in such a case, since the cooling efficiency of the lamp 71 is high, the lamp 71 can be sufficiently cooled. In other words, the projector 1 according to the present embodiment is a projector with improved design freedom such as the arrangement relationship between the lamp 71 and the exhaust fan 84.

  In the above embodiment, an example of the structure of the projector of the present invention has been described. However, the projector of the present invention is not limited to this, and projectors of various structures that require improved lamp cooling efficiency, such as liquid crystal projectors, etc. It can also be used in other projectors.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The projector of the present invention can be particularly advantageously applied to a projector that requires an improvement in lamp cooling efficiency.

  1 projector, 2 housing, 3 projection lens, 4 intake port, 5 exhaust port, 6 intake fan, 7 lamp unit, 8 rod integrator lens, 9 condenser lens, 10 relay lens, 11 mirror, 12 video chip, 13 heat pipe , 71 lamp, 71A light source, 71B reflector, 71D lamp exhaust port, 72 lamp house, 72C UV glass, 73 first flow path, 74, 85, 86 opening, 76 second flow path, 81 air duct, 82 exhaust duct , 83 Exhaust chamber, 84 Exhaust fan.

Claims (2)

A lamp,
A lamp house arranged to surround the lamp;
An air duct connected to the lamp house and supplying cooling air into the lamp house;
An exhaust duct connected to the lamp house and for discharging cooling air in the lamp house to the outside;
In the lamp house,
A first flow path for connecting the air duct and the lamp, and supplying a part of the cooling air supplied from the air duct to the lamp;
A second flow path is formed that connects the air duct and the exhaust duct, and discharges another part of the cooling air supplied from the air duct to the exhaust duct,
The projector has a lamp exhaust opening that opens to the second flow path. An exhaust port connected to the exhaust duct and opening to the outside of the projector;
The projector according to claim 1, wherein the exhaust port is disposed in a direction opposite to an irradiation direction of the lamp when viewed from the lamp.

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