JP2007316352A - Projection display apparatus and light source unit for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection display apparatus for displaying a projection image, the projection display apparatus flexibly and easily meeting demand for a revision in the specification of the apparatus while appropriately cooling a light source. <P>SOLUTION: The projection display apparatus includes the light source for emitting light for displaying the projection image, a cooling fan for blowing air to cool the light source, and a duct for guiding the cooling air from the cooling fan to the light source, wherein, an air guiding member 9 for biasing the air quantity balance through a directional change in the cooling air and an air quantity adjusting member 6 for narrowing the flow passage area so as to adjust the air quantity of the cooling air are arranged in a partial duct 5 constituting a part of the duct. The partial duct 5 can be replaced by attachment/detachment thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projection display device that displays a projected image and a light source unit used in the projection display device.

  In recent years, a liquid crystal projector device is widely known as a projection display device that displays a projected image. The liquid crystal projector device realizes a large screen image display by selectively transmitting light emitted from a light source using a liquid crystal panel and projecting the transmitted light on a screen.

  In such a liquid crystal projector device, generally, a high-intensity discharge lamp such as an ultra-high pressure mercury lamp or a metal halide lamp, that is, a light source that emits white light close to sunlight by discharge is used as a light source. And it is comprised so that cooling using the ventilation from a cooling fan may be performed in order to prevent that the high-intensity discharge lamp becomes too high temperature (for example, refer patent document 1).

  However, the cooling of the high-intensity discharge lamp needs to be optimized in consideration of the installation state of the liquid crystal projector device in order to effectively cool the portion that is actually hot. Specifically, for example, as shown in FIG. 6, the high-intensity discharge lamp includes an arc tube (bulb) 11 and a reflector 12, but the portion above the arc tube 11 in the installed state is hot. Therefore, it is conceivable to make appropriate optimization such as increasing the amount of cooling air for the portion as compared with the portion on the lower side. Further, regarding the liquid crystal projector device 13 that can cope with both the use in the floor-mounted state as shown in FIG. 7A and the use in the ceiling state as shown in FIG. 7A. It is conceivable that the cooling air blowing mode for the light source can be switched using upside down (see, for example, Patent Document 2).

JP 2001-13589 A Japanese Patent Laid-Open No. 10-23355

  However, in the above-described appropriate cooling of the light source, even if the device installation state is taken into consideration, the change in the device specification is not taken into consideration, and thus the specification change cannot be flexibly handled. As a result, there is a risk of lacking versatility.

  For example, when changing a high-intensity discharge lamp to one with a different operating temperature for some reason, in addition to replacing (changing) the light source unit that includes the high-intensity discharge lamp, the operating specifications of the cooling fan Unless (applied voltage or the like) is also changed, it is considered extremely difficult to appropriately enable use of high-intensity discharge lamps having different operating temperature conditions.

  In addition, the apparatus installation state does not correspond to both the floor-standing state and the ceiling-suspended state as described above, but may correspond to only one of these. When changing the device configuration corresponding to only the device configuration to both, or vice versa, it is necessary to change the operating specifications of the cooling fan (applied voltage, etc.) in order to properly cool the light source It is possible that cooling is not appropriate.

  Therefore, an object of the present invention is to provide a projection display device and a light source unit thereof that can flexibly and easily cope with a change in device specifications while achieving appropriate cooling of the light source.

  The present invention is a projection display device devised to achieve the above object, a light source that emits light for displaying a projected image, a cooling fan that blows air to cool the light source, and the cooling In a projection type display device comprising a duct for guiding cooling air from a fan to the light source, an air guide member for biasing an air volume balance through a change in the direction of the cooling air, and a flow path area for adjusting the air volume of the cooling air The air volume adjusting member to be squeezed is disposed in a partial duct that constitutes a part of the duct, and the partial duct is formed to be replaceable by being attached and detached.

  In the projection display device having the above-described configuration, the air guide member and the air volume adjusting member are disposed in the partial duct that constitutes a part of the duct that guides the cooling air from the cooling fan to the light source. The air volume balance is variable and the air volume is adjusted. Therefore, by appropriately setting the shape of the air guide member and the flow passage area narrowed by the air volume adjusting member, the cooling air guided to the light source should be suitable for the apparatus installation state, the operating temperature condition of the light source, etc. It becomes possible. Moreover, the partial duct in which the air guide member and the air volume adjusting member are disposed is formed to be replaceable by being attached and detached. Therefore, even if it corresponds to the change of the apparatus specification, it can respond appropriately to the change by replacement with the partial duct in which the air guide member and the air volume adjusting member according to the changed specification are arranged. It becomes like this.

  As described above, according to the present invention, even if it corresponds to a change in the apparatus specification, it can be replaced by a partial duct in which the air guide member and the air volume adjusting member according to the changed specification are arranged. Therefore, it is possible to appropriately cope with the change in the device specification without requiring a change in the operation specification of the cooling fan. That is, it is possible to respond flexibly and easily to changes in the device specifications while optimizing the cooling of the light source. Therefore, it is very easy to ensure the versatility of the apparatus, and this makes it easy to reduce the apparatus cost.

  Hereinafter, a projection display device and a light source unit thereof according to the present invention will be described with reference to the drawings. Here, a liquid crystal projector device will be described as an example of the projection display device.

  First, a schematic configuration of the liquid crystal projector device will be described. FIG. 1 is an explanatory diagram illustrating a schematic configuration example of a liquid crystal projector apparatus, and FIGS. 2 and 3 are explanatory diagrams illustrating a configuration example of a main part thereof.

  As shown in FIG. 1, the liquid crystal projector device includes an optical system unit 1, a cooling fan 2, a cooling duct 3, and a light source unit 4 in the casing.

  The optical system unit 1 includes, for example, a combination of a filter, a fly-eye lens, a PS separator / synthesizer, a dichroic mirror, a total reflection mirror, a condenser lens, a liquid crystal panel, a dichroic prism, a projection lens, and the like. When receiving light emitted from the dichroic filter that reflects only light in a specific wavelength band after passing through a filter that cuts infrared and ultraviolet rays, a fly-eye lens, and a PS separator / synthesizer that converts non-polarized waves into polarized waves Each color component light of RGB is separated by a mirror and incident on each liquid crystal panel corresponding to each color of RGB while using a total reflection mirror and condenser lens as necessary. After light modulation is performed according to the signal, each color component light that has been modulated is applied to the dichroic prism. Synthesized it, is configured to expand projected by a projection lens. With such a configuration, the optical system unit 1 performs projection display of a color image on the screen.

  The cooling fan 2 is made of, for example, a sirocco fan, and sucks air from outside the casing and blows air to cool the light source unit 4 using the sucked air.

  As shown in FIG. 2, the cooling duct 3 is a duct for guiding cooling air from the cooling fan 2 to the light source unit 4.

  The light source unit 4 includes a light source (not shown) that emits light for displaying a projected image. As the light source, a high-intensity discharge lamp such as an ultra-high pressure mercury lamp or a metal halide lamp is used.

  By the way, it is conceivable that high-intensity discharge lamps such as ultra-high pressure mercury lamps and metal halide lamps do not emit light due to the lamp life, or may fail or be damaged due to some factors. In other words, the high-intensity discharge lamp is a consumable item and is considered to require periodic maintenance and replacement. However, the maintenance and replacement should not be complicated. From this, the light source unit 4 is comprised so that it can respond to the replacement | exchange for every unit unit containing a light source, ie, every light source unit 4, as shown in FIG. That is, the light source unit 4 including the light source is modularized so as to be replaceable.

  In the light source unit 4, a spatial region including a light-emitting tube (not shown) of a high-intensity discharge lamp serving as a light source is formed by the reflector 4 a of the high-intensity discharge lamp and other components.

  As one of the components forming the space area, the light source unit 4 is provided with a lamp box duct 5 for guiding the cooling air passing through the cooling duct 3 into the space area. The lamp box duct 5 is attached to the light source unit 4 and functions as a “partial duct” constituting a part of the cooling duct 3.

  A mesh member 6 is disposed in an opening for the lamp box duct 5 to receive cooling air from the cooling duct 3. The mesh member 6 realizes a foreign matter scattering prevention function. That is, even if the arc tube of the high-intensity discharge lamp is damaged due to the presence of the mesh member 6, foreign matters such as the broken pieces are left in the light source unit 4 without scattering to the cooling duct 3 side. It is like that.

  On the other hand, an exhaust port 7 for exhausting the cooling air from the space area is provided at a position opposite to the position where the lamp box duct 5 is provided with the arc tube of the high-intensity discharge lamp interposed therebetween. The exhaust from the exhaust port 7 is discharged out of the housing through the exhaust duct 8 (see FIG. 1). The exhaust member 7 is also provided with a mesh member 7a, thereby realizing a foreign matter scattering prevention function.

  Here, the characteristic configuration of the liquid crystal projector apparatus and the light source unit 4 will be described in more detail. FIG. 4 and FIG. 5 are explanatory diagrams showing characteristic configuration examples of main parts of the liquid crystal projector device according to the present invention.

  As shown in FIG. 4, a wind guide member 9 is disposed in the lamp box duct 5. The air guide member 9 is composed of a plate-like member formed so as to protrude into a part of the passage passage of the cooling air by the lamp box duct 5 and passes through the passage passage through the change in the direction of the cooling air. This is for biasing the air flow balance of the cooling air. If the shape, the protruding amount and the arrangement position of the air guide member 9 are different, the air volume balance realized by the air guide member 9 is also different. In addition, what is necessary is just to set suitably about the shape, protrusion amount, and arrangement | positioning position of the air guide member 9 according to the desired air volume balance.

  In addition, a mesh member 6 is disposed in the lamp box duct 5, and this mesh member 6 may function as an air volume adjusting member that narrows the flow passage area for adjusting the air volume (absolute amount) of the cooling air. It has become. That is, when the cooling air passes through the mesh member 6, the flow passage area is reduced by the mesh member 6, and thus the air volume of the cooling air passing through the mesh member 6 is also reduced. This means that the flow rate of the cooling air passing through the mesh member 6 is different if the flow path area throttled by the mesh member 6 is different. On the other hand, the flow path area narrowed by the mesh member 6 is determined by the aperture ratio of the mesh member 6. Accordingly, as shown in FIGS. 5A to 5C, the mesh member 6 has a maximum opening ratio necessary for realizing the foreign matter scattering prevention function as a reference opening ratio, and 80% of the reference opening ratio, The air volume of the cooling air can be adjusted by making the aperture ratios different, such as 60%. In addition, what is necessary is just to set suitably about the aperture ratio of the mesh member 6 according to the desired air volume.

  The lamp box duct 5 in which the air guide member 9 and the mesh member 6 functioning as an air volume adjusting member are disposed is attached to the light source unit 4. That is, since the light source unit 4 is modularized so as to be replaceable, the lamp box duct 5 is also detached from the casing of the liquid crystal projector device as the light source unit 4 is detached.

  This means that the lamp box duct 5 can be replaced by the attachment and detachment. Therefore, if the lamp box duct 5 is replaced, at least one of the shape, the protruding amount, the arrangement position, or the opening ratio of the mesh member 6 after the replacement is different from that before the replacement. Thus, at least one of variable air volume balance of the cooling air and light volume adjustment for the light source unit 4 can be performed.

  As described above, in the liquid crystal projector device described in the present embodiment and the light source unit 4 used in the liquid crystal projector device, the cooling air from the cooling fan 2 enters the space region including the arc tube of the high-intensity discharge lamp serving as the light source. An air guide member 9 and a mesh member 6 that functions as an air volume adjusting member are disposed in a lamp box duct 5 that constitutes a part of the cooling duct 3 that guides the air. Etc. are to be performed. Accordingly, by appropriately setting the shape of the air guide member 9 and the flow passage area narrowed by the mesh member 6 functioning as the air volume adjusting member, the cooling air guided to the light source unit 4 can be supplied to the apparatus installation state or the high-intensity discharge lamp. It becomes possible to make it suitable for operating temperature conditions.

  Specifically, for example, in order to correspond to both the use in the floor-mounted state and the use in the ceiling state, the air volume above and below the arc tube of the high-intensity discharge lamp in the installed state is equalized, In order to set the shape, amount of protrusion, and arrangement position of the air guide member 9 or to favorably cope with only one of the floor-mounted state and the ceiling-suspended state, an air flow difference is given above and below the arc tube and the upper side It is conceivable to set the shape, the protruding amount, and the arrangement position of the air guide member 9 so that the air volume is larger than the lower side. In addition, it is desirable that the temperature of the arc tube of the high-intensity discharge lamp belongs to a desired temperature range. For example, the flow area of the cooling air is increased in order to lower the temperature of the vicinity by increasing the amount of cooling air. In order to set the aperture ratio of the mesh member 6 so as to approach the reference aperture ratio, or to avoid the temperature in the vicinity of the mesh member 6 from dropping too much and deviating from the desired temperature range, the flow area of the cooling air is reduced. It is conceivable to set the aperture ratio of the mesh member 6 so as to be reduced (squeezed).

  Moreover, the lamp box duct 5 in which the air guide member 9 and the mesh member 6 that are set as described above are provided is attached to the light source unit 4 and attached / detached along with the light source unit 4. It is formed to be exchangeable. Therefore, even if it corresponds to the change of the apparatus specification, the change is made by replacing the lamp box duct 5 provided with the air guide member 9 and the mesh member 6 set according to the changed specification. It will be possible to respond appropriately.

  Specifically, for example, the high-intensity discharge lamp is changed to one with a different operating temperature condition, or the one corresponding to only one of the floor-mounted state and the ceiling-mounted state is changed to be compatible with both. It is possible to easily change the device specifications such as (or vice versa) simply by replacing the lamp box duct 5, and it is necessary to change the operation specifications (applied voltage, etc.) of the cooling fan 2. , Cooling can not be optimized.

  That is, according to the liquid crystal projector apparatus described in the present embodiment and the light source unit 4 used in the liquid crystal projector apparatus, even when the apparatus specifications are changed, the air guide member according to the changed specifications. 9 and the replacement to the lamp box duct 5 in which the mesh member 6 is disposed, it is possible to appropriately cope with the change in the apparatus specification without requiring a change in the operation specification of the cooling fan 2. Therefore, it is possible to flexibly and easily cope with changes in the apparatus specifications while optimizing the cooling of the light source, and as a result, it is very easy to ensure the versatility of the apparatus, and through this, the apparatus cost can be reduced. Reduction and the like can be easily realized.

  In addition, although this embodiment demonstrated the suitable Example of this invention, this invention is not limited to the content, It can change suitably in the range which does not deviate from the summary.

  For example, in the present embodiment, the lamp box duct 5 is attached to the light source unit 4 that is a module that is equipped with a light source to be cooled and is considered to have a high necessity or frequency of replacement. The case where the liquid crystal projector apparatus is detached from the housing has been described as an example, but the present invention is not limited to the content. That is, as long as the lamp box duct 5 is formed so as to be exchangeable by attachment / detachment, the lamp box duct 5 may be attached / detached separately from the light source unit 4, and even in that case, the apparatus specification can be changed flexibly and easily. It can correspond to.

  Further, in the present embodiment, the mesh member 6 has a function as an air volume adjusting member in addition to the foreign matter scattering prevention function, and this contributes to simplification of the apparatus configuration. The content is not limited. That is, the function as the air volume adjusting member may be provided separately from the foreign matter scattering prevention function. Further, the function as the air volume adjusting member does not necessarily need to be realized by a mesh-like member, and an opening, a notch, a combination of these, etc., as long as the flow area is narrowed down for adjusting the air volume of the cooling air It may be made up of. Further, the mesh member 6 is not limited to one, and a plurality of two or more mesh members may be provided, and a similar effect may be obtained by increasing or decreasing the number of the mesh members 6. At this time, the plurality of meshes may have the same shape, or may be a combination of meshes having different shapes. Furthermore, if the air volume of the cooling air can be adjusted, for example, the mesh member 7a is used instead of the upstream side of the space region that includes the arc tube of the high-intensity discharge lamp. It is also possible to arrange both on the downstream side.

It is explanatory drawing which shows the schematic structural example of a liquid crystal projector device. It is explanatory drawing (the 1) which shows the principal part structural example of a liquid crystal projector device. It is explanatory drawing (the 2) which shows the principal part structural example of a liquid crystal projector device, and is a figure which shows the schematic structural example of a light source unit. It is explanatory drawing (the 1) which shows the characteristic example of a principal part structure of the liquid crystal projector device which concerns on this invention. It is explanatory drawing (the 2) which shows the example of a characteristic principal part structure of the liquid crystal projector device which concerns on this invention. It is explanatory drawing which shows the structural example of the high-intensity discharge lamp used as a light source of a liquid-crystal projector apparatus. It is explanatory drawing which shows the specific example of the installation state of a liquid-crystal projector apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical system unit, 2 ... Cooling fan, 3 ... Cooling duct, 4 ... Light source unit, 5 ... Lamp box duct, 6 ... Mesh member, 9 ... Air guide member

Claims (4)

A light source that emits light for displaying a projected image;
A cooling fan that blows air to cool the light source;
In a projection type display device comprising a duct for guiding cooling air from the cooling fan to the light source,
A wind guide member for biasing the air volume balance through a change in the direction of the cooling air;
An air volume adjusting member for reducing the flow path area for adjusting the air volume of the cooling air;
Disposed in a partial duct constituting a part of the duct,
The projection type display device, wherein the partial duct is formed to be exchangeable by being attached and detached.   The projection display device according to claim 1, wherein the partial duct is attached to a light source unit in which the light source is disposed, and is formed so as to be attached and detached along with the light source unit.   The projection type display device according to claim 2, wherein the air volume adjusting member is made of a mesh member for preventing scattering of foreign substances included in the light source unit. A light source unit used in a projection display device that displays a projection image,
A light source that emits light for displaying the projected image;
A partial duct for receiving cooling air from a cooling fan of the projection display device for cooling the light source from the projection display device side and guiding it to the light source;
An air guide member disposed in the partial duct and biasing an air volume balance through a change in the direction of the cooling air;
A light source unit for a projection display device, comprising: an air volume adjusting member disposed in the partial duct and configured to reduce a flow path area for adjusting the air volume of the cooling air.

Images