JP3788617B2 - Image display projector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image display projector that projects an image and displays it on a screen or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is an image display projector that forms an image by an image forming element using light emitted from a lamp based on an image signal from a personal computer or a video camera, and projects the image on a screen or the like. . In general, an image display projector has a lamp and an image forming element built in a housing, and projects an image formed by the image forming element from an image projection port provided on the front surface (side surface) of the housing. Yes. The lamp is mounted in the housing while being housed in the lamp module, and the lamp module is removed from the housing when the lamp is replaced. Further, a fan for cooling the lamp is disposed in the housing, and air is blown by the fan to cool the lamp.
[0003]
This type of image display projector is provided with a housing exhaust port on a side surface (a front surface or a lateral surface provided with an image projection port) and a module air intake port on one side surface of the lamp module. It is known that a module exhaust port is provided on the other side surface and the lamp module is arranged in a state where the module exhaust port is adjacent to the housing exhaust port. In the image display projector having such a configuration, the air blown from the fan is sucked into the lamp module from the module intake port to cool the lamp, and the air after cooling the lamp is discharged from the lamp exhaust port to the outside of the lamp module. After that, it is discharged from the casing exhaust port to the outside of the casing.
[0004]
In addition, a projector is known in which an exhaust duct having an air flow path is provided at a lower portion of a light source case, and heat inside the casing is exhausted to the rear and bottom surfaces of the casing through the exhaust duct (for example, Patent Documents). 1). In addition, an intake duct is disposed on one side surface of the housing, and an exhaust duct is disposed on the other side surface of the housing, so that the intake port of the intake duct and the exhaust port of the exhaust duct are connected to the front surface of the housing. A projector disposed on the side is known (see, for example, Patent Document 2). There is known a projector having an air inlet on the back and bottom of the outer case and an air outlet on the front (see, for example, Patent Document 3).
[0005]
[Patent Document 1]
JP 2001-2222066 [Patent Document 2]
JP 2001-68882 A [Patent Document 3]
JP-A-2002-341445 [0006]
[Problems to be solved by the invention]
By the way, the air after cooling the lamp is heated by the heat of the lamp, and this heated air is blown to the casing exhaust port, so that the temperature of the casing near the casing exhaust port becomes high. This temperature of the housing is called a touch temperature. The upper limit temperature of the touch temperature is determined by standards and the like, and it is preferable to keep the temperature as low as possible from the viewpoint of safety.
[0007]
However, in the conventional image display projector described above, the module exhaust port on the side surface of the lamp module is adjacent to the housing exhaust port on the side surface of the housing, so that the air after cooling the lamp is discharged from the module exhaust port. Immediately reach the housing exhaust. For this reason, the air after lamp cooling is blown around the casing exhaust port in a high temperature state, and the touch temperature may increase more than necessary. In addition, when the housing exhaust port is provided on the front surface of the housing having the image projection port, the image projected from the image projection port passes through the high-temperature air exhausted from the housing exhaust port, and the like. Therefore, there is a possibility that an image fluctuation phenomenon called a heat wave may occur.
[0008]
In particular, in a configuration in which the lamp module has an intake port and an exhaust port, air is heated to a higher temperature by being blown directly onto the lamp, so these problems are important. Note that the projectors described in Patent Documents 1 to 3 described above do not have a configuration in which the lamp module has an intake port and an exhaust port, and these Patent Documents 1 to 3 include a touch temperature. There is no description about suppressing the occurrence of heat waves or the generation of heat waves. Therefore, even if the contents disclosed in Patent Documents 1 to 3 are applied, the above-described problem cannot be solved.
[0009]
SUMMARY An advantage of some aspects of the invention is that it provides an image display projector that can suppress a touch temperature that is a temperature of a casing around a casing exhaust port.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a lamp module containing a lamp that emits light for image projection, an image forming element that forms an image using light from the lamp, a lamp module, A housing containing the image forming element and a fan disposed inside the housing for blowing air to the lamp module to cool the lamp, and the lamp module is provided on a side surface of the lamp module facing the fan. After having a module side air inlet for sucking air blown by a fan into the lamp module, and cooling the lamp by being sucked from the module side air inlet on the side opposite to the module side air inlet of the lamp module The module has a module side exhaust port for discharging the air outside the lamp module, and the case has a module side on the side of the case. In the image display projector having a housing side exhaust port for discharging the air discharged from the exhaust port to the outside of the housing, the lamp module has the air after cooling the lamp on the bottom surface of the lamp module. It further has a module bottom exhaust port that discharges to the outside of the lamp module. Between the bottom surface of the lamp module and the bottom surface of the housing, a part of the air exhausted from the module bottom exhaust port is bypassed to the housing side exhaust port. A bypass flow path is provided, and the housing further includes a housing bottom surface exhaust port for discharging air discharged from the module bottom surface exhaust port to the outside of the housing on the bottom surface of the housing. The air after lamp cooling passes through the module side exhaust port to the housing side exhaust port, the route through the module bottom surface exhaust port and the bypass flow path to the housing side exhaust port, Through Yuru bottom outlet is intended to be discharged by the route to the housing bottom outlet.
[0011]
In this configuration, air blown from the fan is sucked into the lamp module from the module side air inlet, and cools the lamp housed in the lamp module. Then, the air after cooling the lamp is discharged out of the lamp module from both the module side surface exhaust port and the module bottom surface exhaust port. The air discharged from the module side exhaust port to the outside of the lamp module is directly discharged from the case side exhaust port to the outside of the case. In addition, part of the air discharged from the module bottom surface exhaust port to the outside of the lamp module is exhausted from the case side exhaust port to the outside of the case through a bypass flow path, and the other part from the case bottom surface exhaust port. It is discharged outside the housing. The heat of the air passing through the bypass flow path is transmitted to the bottom surface of the casing while the air passes through the bypass flow path, and thereby the temperature of the air reaching the casing side exhaust port via the bypass flow path is lowered. To do.
[0012]
That is, the temperature of the air exhausted from the casing side exhaust port is lowered because a part of the air has passed through the bypass flow path. In addition, air is dispersed and discharged from the case side exhaust port and the case bottom exhaust port, and the amount of air discharged from the case side exhaust port is reduced. As a result, it is possible to suppress an unnecessarily high temperature rise around the casing side surface exhaust port. Although the temperature at the bottom of the chassis rises due to the heat of the air passing through the bypass flow path, it can be used in normal installations where the bottom of the chassis is placed face down, or suspended from the ceiling that fixes the bottom of the chassis toward the wall. Even in a lowered installation, there are few opportunities for the user to touch the bottom surface of the housing, so that there is no problem due to the temperature of the bottom surface of the housing rising.
[0013]
According to a second aspect of the present invention, there is provided a lamp module containing a lamp that emits light for image projection, an image forming element that forms an image using light from the lamp, and a housing that incorporates the lamp module and the image forming element. And a fan disposed inside the casing for blowing air to the lamp module to cool the lamp, and the lamp module includes a module inlet for sucking the air blown by the fan into the lamp module; A module exhaust port that discharges air after being sucked in from the module intake port and cooling the lamp to the outside of the lamp module, and the casing is arranged on the side surface of the casing, and the air exhausted from the module exhaust port In the image display projector having a housing side exhaust port for discharging the outside of the housing, the module exhaust port is provided on the bottom surface of the lamp module. The lamp-cooled air exhausted from the module bottom exhaust port is exhausted from the housing side exhaust port via a flow path between the lamp module bottom surface and the housing bottom surface. is there.
[0014]
In this configuration, the air blown from the fan is sucked into the lamp module from the module inlet and cools the lamp housed in the lamp module. The air after cooling the lamp is discharged from the module bottom exhaust port to the outside of the lamp module, and then passes through the flow path between the bottom surface of the lamp module and the bottom surface of the case to the case side exhaust port. It is discharged outside. The heat of the air exhausted from the module bottom exhaust port to the outside of the lamp module is transferred to the bottom surface of the housing while the air passes through the flow path between the bottom surface of the lamp module and the bottom surface of the housing, As a result, the temperature of the air discharged from the housing side surface exhaust port is reduced, and an unnecessarily high temperature rise around the housing side surface exhaust port is suppressed. Although the temperature at the bottom of the housing rises, the user touches the bottom of the housing in normal installations where the bottom of the housing is placed facing down, or in ceiling hanging installations where the bottom of the housing is fixed toward the wall Since there are few opportunities, there will be no trouble due to the temperature rise of the bottom of the housing.
[0015]
According to a third aspect of the present invention, in the image display projector according to the second aspect, the lamp module further includes a module side surface exhaust port different from the module bottom surface exhaust port on the side surface opposite to the module air intake port. In addition to the route through the module bottom surface exhaust port and the flow passage to the housing side surface exhaust port, the air after cooling the lamp is discharged by the route from the module side surface exhaust port to the housing side surface exhaust port. It is.
[0016]
In this configuration, the air after cooling the lamp is discharged out of the lamp module from both the module bottom surface exhaust port and the module side surface exhaust port. The air exhausted from the module bottom exhaust port to the outside of the lamp module is exhausted from the housing side exhaust port to the outside of the housing via the flow path between the lamp module bottom surface and the housing bottom surface as described above. The air discharged from the module side exhaust port to the outside of the lamp module is directly discharged from the case side exhaust port to the outside of the case. As a result, an unnecessarily high temperature rise around the casing side surface exhaust port is suppressed, and the temperature of the bottom face of the casing does not rise too much.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. 1A, 1B, 1C, 2 and 3, an image display projector 1 is for projecting an image emitted from a lamp 2 based on an image signal input from a personal computer, a video camera or the like. Is an apparatus that forms an image by the image forming element 3 using the light of the light and projects and displays the image on the screen or the like from the projection lens 4.
[0018]
The image display projector 1 includes a lamp module 11, an optical engine 12, a sirocco fan 13, a control board 14, and a housing 20 in which these are built. The housing 20 includes an image projection opening 21, housing side air inlets 22a and 22b, a housing side air exhaust port 23, and a housing bottom surface exhaust port 24, and includes a bottom case 27 and an upper cover. 28 and a lamp door 29. The image projection opening 21 is provided on the front surface (side surface) of the housing 20 (bottom case 27). The housing side air inlet 22a is provided on the rear surface (side surface) of the housing 20 (bottom case 27), and the housing side air inlet 22b is a lateral surface of the housing 20 (bottom case 27 and top cover 28). (Side) is provided. The housing side exhaust port 23 is provided on the front surface of the housing 20 (bottom case 27), and the housing bottom surface exhaust port 24 is provided on the bottom surface of the housing 20 (bottom case 27).
[0019]
The lamp module 11 houses the above-described lamp 2 and can be attached to and detached from the lamp mounting space 16 formed by the lamp house 15. The lamp house 15 is provided adjacent to the inside of the housing side surface exhaust port 23, and has a structure in which the lamp mounting space 16 is formed by the house frame body 17 and the bottom surface 27 a of the bottom case 27. An intake opening 32 and exhaust openings 33 and 34 are provided on the side surface of the house frame 17. Further, the housing bottom surface exhaust port 24 is provided at a position (the bottom portion of the lamp house 15) where the lamp mounting space 16 is formed on the bottom surface 27 a of the bottom case 27. The lamp module 11 is built in the housing 20 by being mounted in the lamp mounting space 16 of the lamp house 15. The lamp 2 housed in the lamp module 11 emits light for image projection toward the optical engine 12.
[0020]
The optical engine 12 includes a reflection mirror 5 in addition to the image forming element 3 and the projection lens 4 described above. The image forming element 3 reflects the light from the lamp 2 to form an image. The projection lens 4 projects reflected light from the image forming element 3, that is, an image formed by the image forming element 3 toward the outside of the housing 20, and is disposed at a position facing the image projection opening 21. ing. The reflection mirror 5 reflects the image projection light emitted from the lamp 2 and irradiates the image forming element 3.
[0021]
The sirocco fan 13 blows air to cool the lamp 2 with air. The sirocco fan 13 blows air toward the lamp house 15 (and thus toward the lamp module 11 and the lamp 2 mounted on the lamp house 15). Inside the housing 20, an air flow is generated from the sirocco fan 13 toward the lamp house 15. Air is sucked into the housing 20 from the housing side air inlets 22 a and 22 b, and the housing side air outlet 23. In addition, the air is discharged from the housing bottom surface exhaust port 24 to the outside of the housing 20.
[0022]
The control board 14 is disposed between the sirocco fan 13 and the housing side air inlet 22a. The control board 14 is provided with a power supply circuit, a lamp starting circuit, an image processing circuit, a fan drive circuit, a control circuit for controlling these, and the like (all not shown).
[0023]
Next, the lamp module 11 will be described with reference to FIGS. 4 (a), 4 (b), and 4 (c). The lamp module 11 houses the lamp 2 as described above. The lamp module 11 has a light projecting opening 41, a module side air inlet 42, a module side air outlet 43, and a module bottom air outlet 44.
[0024]
The projection opening 41 is for projecting the image projection light emitted from the lamp 2 to the outside of the lamp module 11, and is provided on the front surface of the lamp module 11. The module side air inlet 42 is provided on the left side surface of the lamp module 11 when viewed in the direction of light emission from the lamp 2, and the module side air outlet 43 is viewed in the direction of light emission from the lamp 2. It is provided on the right side surface of the module 11. The module bottom surface exhaust port 44 is provided on the bottom surface of the lamp module 11. A recess 45 is formed in the bottom surface of the lamp module 11, and the module bottom surface exhaust port 44 is provided in the recess 45. The recess 45 forms a bypass flow path, which will be described later, and faces the side surface on the side where the module side surface exhaust port 43 is provided.
[0025]
The lamp module 11 having such a configuration is mounted in the lamp house 15 with the projection opening 41 facing the optical engine 12. In a state where the lamp module 11 is mounted in the lamp house 15, the module side air inlet 42 coincides with the inside of the air intake opening 32 of the house frame body 17 and faces the sirocco fan 13. The inside of the exhaust opening 33 of the house frame 17 is matched and faces the housing side surface exhaust port 23. The module bottom surface exhaust port 44 is positioned above the housing bottom surface exhaust port 24 of the bottom case 27, and the recess 45 communicates with the exhaust opening 34 of the house frame 17.
[0026]
Next, the flow of air related to the cooling of the lamp 2 with the lamp module 11 mounted in the lamp house 15 will be described with reference to FIG. Air is blown into the lamp house 15 from the sirocco fan 13 (the flow of air is indicated by arrows in the figure). The air blown from the sirocco fan 13 passes through the intake opening 32 of the house frame 17, is sucked into the lamp module 11 from the module side air inlet 42 of the lamp module 11, and is stored in the lamp module 11. The lamp 2 is cooled. The air after cooling the lamp is discharged to the outside of the lamp module 11 from both the module side surface exhaust port 43 and the module bottom surface exhaust port 44.
[0027]
The air discharged from the module side exhaust port 43 to the outside of the lamp module 11 passes through the exhaust opening 33 of the house frame 17 and is directly discharged from the housing side surface exhaust port 23 to the outside of the housing 20. On the other hand, a part of the air discharged from the module bottom surface exhaust port 44 to the outside of the lamp module 11 passes through the recess 45 provided on the bottom surface of the lamp module 11 and the exhaust opening 34 of the house frame body 17. It reaches the side exhaust port 23 and is discharged from the housing side exhaust port 23 to the outside of the housing 20. The recess 45, the exhaust opening 34, and the bottom surface 27a of the bottom case 27 form a bypass flow path that bypasses a part of the air after cooling the lamp and circulates it to the housing side surface exhaust port 23. Further, another part of the air discharged from the module bottom surface exhaust port 44 to the outside of the lamp module 11 is discharged from the housing bottom surface exhaust port 24 to the outside of the housing 20.
[0028]
In this way, the air after lamp cooling is exhausted to the side of the casing through the route from the module side exhaust 43 to the casing side exhaust 23, the module bottom exhaust 44, the recess 45, and the exhaust opening 34. It is discharged to the outside of the housing 20 through three routes: a route to the port 23 and a route to the housing bottom surface exhaust port 24 through the module bottom surface exhaust port 44.
[0029]
According to the image display projector 1 having such a configuration, the heat of the air passing through the recess 45 and the exhaust opening 34 reaches the housing side exhaust port 23 through the recess 45 and the exhaust opening 34. Since the air is transmitted to the bottom surface 27a of the bottom case 27 in the meantime, the temperature of the air reaching the housing side surface exhaust port 23 through the recess 45 and the exhaust opening 34 is lowered. And since the air discharged | emitted from the housing | casing side surface exhaust port 23 contains the air which passed the recess 45 and the exhaust opening 34 in the part, the temperature falls. As a result, the temperature of the casing 20 around the casing side exhaust port 23 called the touch temperature does not rise more than necessary, and the image is irradiated on the screen or the like through high-temperature air. The generated image fluctuation phenomenon called heat wave can be suppressed.
[0030]
In addition, since the air after the lamp is cooled is dispersedly discharged from the case side exhaust port 23 and the case bottom exhaust port 24, the amount of air discharged from the case side exhaust port 23 is the case bottom exhaust. Decreases by the amount of air discharged from the mouth 24. This also prevents the touch temperature from rising more than necessary and suppresses heat waves. Furthermore, since the air reaching the housing side surface exhaust port 23 through the recess 45 and the exhaust opening 34 is only a part of the air after cooling the lamp, the temperature of the bottom surface 27a of the bottom case 27 may rise too much. Absent.
[0031]
Although the temperature of the bottom surface 27a of the bottom case 27 rises due to the heat of the air passing through the bypass flow passage 45 and the exhaust opening 34, the bottom case 27 can be placed in the normal position where the bottom surface 27a is placed downward. Even in a ceiling-suspended installation in which the bottom surface 27a of the case 27 is fixed toward the wall side, there are few opportunities for the user to touch the bottom surface 27a of the bottom case 27, so that troubles due to an increase in temperature of the bottom surface 27a of the bottom case 27 occur. Absent.
[0032]
In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible. For example, in the above embodiment, the housing bottom surface exhaust port 24 is not necessarily provided, and the module side surface exhaust port 43 is not necessarily provided. Even in a configuration in which the housing bottom surface exhaust port 24 and the module side surface exhaust port 43 are not provided, the air after cooling the lamp passes through the module bottom surface exhaust port 44, the recess 45, and the exhaust opening 34 (a bypass flow path). Since the temperature decreases, the touch temperature does not increase more than necessary, and heat waves can be suppressed. The housing side exhaust port 23 is not limited to the front surface of the housing 20 in which the image projection opening 21 is provided, and may be provided on the lateral surface of the housing 20.
[0033]
【The invention's effect】
As described above, according to the invention of claim 1, the lamp module has the module bottom surface exhaust port on the bottom surface and the housing side surface exhaust port on the side surface of the lamp module. Since there is a bypass flow path that bypasses and flows to the case side exhaust port, the temperature of the air exhausted from the case side exhaust port decreases. The temperature can be suppressed. In addition, in the configuration in which the image projection port is provided on the same side surface as the housing side surface exhaust port, the generation of heat waves can be suppressed. In addition, since the housing bottom surface exhaust port is provided on the bottom surface of the housing, the air discharged from the housing side surface exhaust port is reduced, and this also suppresses the touch temperature around the housing side surface exhaust port. It is possible to suppress the generation of heat waves. Further, since the side of the lamp module has a module side exhaust port, a part of the air after cooling the lamp is exhausted from the case side exhaust port through the module side exhaust port. Does not rise too much.
[0034]
According to the second aspect of the present invention, the lamp module has a module bottom surface exhaust port on the bottom surface and a housing side surface exhaust port on the side surface of the housing, and the lamp-cooled air discharged from the module bottom surface exhaust port is Since the air is exhausted from the housing side exhaust port via the flow path between the bottom surface of the module and the bottom surface of the housing, the temperature of the air exhausted from the housing side air exhaust port is lowered. The touch temperature around the side exhaust port can be suppressed. In addition, in the configuration in which the image projection port is provided on the same side surface as the housing side surface exhaust port, the generation of heat waves can be suppressed.
[0035]
According to the invention of claim 3, since the module side surface exhaust port is provided on the side surface of the lamp module, a part of the air after cooling the lamp is discharged from the housing side surface exhaust port through the module side surface exhaust port. Thus, the temperature of the bottom surface of the housing does not rise too much, and it can be used safely and comfortably.
[Brief description of the drawings]
1A is a perspective view showing a schematic configuration of an image display projector according to an embodiment of the present invention as seen from the front side, FIG. 1B is a perspective view seen from the rear side, and FIG. The perspective view seen from the bottom side.
FIG. 2 is a perspective view showing the internal configuration of the image display projector as seen from the front side.
FIG. 3 is a perspective view showing the internal configuration of the image display projector as seen from the rear side.
4A is a perspective view showing the configuration of the lamp module of the image display projector as seen from the right side, FIG. 4B is a perspective view seen from the left side, and FIG. 4C is seen from the bottom side. Perspective view.
FIG. 5 is a cross-sectional view taken along the line P-P in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Image display projector 2 Lamp 3 Image forming element 4 Projection lens 11 Lamp module 12 Optical engine 13 Sirocco fan 14 Control board 15 Lamp house 20 Case 21 Image projection opening 22a, 22b Case side intake port 23 Case side exhaust port 24 Housing bottom surface exhaust port 42 Module side air inlet port 43 Module side surface exhaust port 44 Module bottom surface exhaust port 45 Recessed portion (bypass flow path)

Claims (3)

A lamp module that contains a lamp that emits light for image projection, an image forming element that forms an image using light from the lamp, a housing that contains the lamp module and the image forming element, and the lamp A fan disposed inside the housing for blowing air to the lamp module to cool the lamp module, and the lamp module has air blown by the fan on a side surface facing the fan of the lamp module. A module side air inlet for sucking the lamp module into the lamp module, and air on the side opposite to the module side air inlet of the lamp module after being sucked from the module side air inlet and cooling the lamp. A module side exhaust port for discharging outside the lamp module is provided, and the casing is provided on the side surface of the casing. In the image display projector comprising a housing side exhaust port for discharging the air discharged from Yuru side exhaust port casing outside,
The lamp module further includes a module bottom surface exhaust port for discharging the air after cooling the lamp to the outside of the lamp module on the bottom surface of the lamp module;
Between the bottom surface of the lamp module and the bottom surface of the housing, a bypass flow passage is provided for bypassing a part of the air discharged from the module bottom surface exhaust port to the housing side surface exhaust port. And
The housing further includes a housing bottom surface exhaust port for discharging the air discharged from the module bottom surface exhaust port to the outside of the housing on the bottom surface of the housing,
The route after cooling the lamp through the module side surface exhaust port to the housing side surface exhaust port, the route from the module bottom surface exhaust port and the bypass flow path to the housing side surface exhaust port, and the module An image display projector, wherein the image display projector is discharged by a route from a bottom exhaust port to the casing bottom exhaust port. A lamp module that contains a lamp that emits light for image projection, an image forming element that forms an image using light from the lamp, a housing that contains the lamp module and the image forming element, and the lamp A fan disposed inside the housing for blowing air to the lamp module to cool the lamp module, and the lamp module includes a module intake port for sucking air blown by the fan into the lamp module; A module exhaust port that discharges air after being sucked from the module intake port and cooling the lamp to the outside of the lamp module, and the casing is provided on a side surface of the casing from the module exhaust port. In an image display projector having a casing side exhaust port for discharging discharged air to the outside of the casing,
The module exhaust port is provided on the bottom surface of the lamp module,
The air after cooling the lamp discharged from the module bottom surface exhaust port is discharged from the case side surface exhaust port via a flow path between the bottom surface of the lamp module and the bottom surface of the housing. A featured image display projector. The lamp module further has a module side surface exhaust port different from the module bottom surface exhaust port on the side surface opposite to the module air intake port,
In addition to the route where the air after cooling the lamp passes through the module bottom surface exhaust port and the flow passage to reach the housing side surface exhaust port, the air passes through the module side surface exhaust port and reaches the housing side surface exhaust port. The image display projector according to claim 2, wherein the image display projector is discharged.

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