JP2006011337A - Lamp light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp light source device which has a large cooling effect and can be used continuously for a long time. <P>SOLUTION: The lamp light source device has: a discharge lamp; a reflector which is deposed around the discharge lamp to reflect light toward a fixed direction; a light emitting opening which is positioned at an opening end of the reflector and guides light; a mesh-like opening for covering the periphery of the light emitting opening; a transparent protection plate provided so as to not only make a space surrounded with the reflector and the mesh-like opening into a closed space but also close the light emitting opening; a first fan for enclosing cooling air from the mesh-like opening into the closed space; an air filter for covering an inlet of the first cooling fan; and a second cooling fan for cooling an outer periphery of the reflector. Thus dust stuck to the air filter can be easily removed without allowing dust to be stuck to the reflector of the lamp light source device. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a lamp light source device, and more particularly to a lamp light source device used for a front type projector or a rear type projector.

Normally, when a discharge lamp such as a high-pressure mercury lamp is damaged, the glass fragments of the discharge lamp directly hit a reflector made of glass material, and a strong impact is applied to the reflector. May splash into the enclosure.
In order to solve these problems, it is conceivable to use crystallized glass with high strength against impact as the glass base material of the reflector, but such high-strength crystallized glass is expensive and increases the cost. Invite.
In addition, it is conceivable to make the glass material of the reflector thick, but the amount of glass material used to mold a reflector with a high thickness film increases, and it is difficult to mold and process, which also increases the cost. . Furthermore, when the glass material is thick, it becomes weak against heat distortion and becomes a fragile structure.

In particular, it is assumed that the rear projector device is often used as a television receiver. Therefore, the operation time is longer than that of a normal front projector, and the heat dissipation problem of the discharge lamp and the destruction of the discharge lamp are caused. / Further measures against damage are desired.

Japanese Patent Laid-Open No. 10-254061 JP 2001-125195 A JP-A-8-201917

In the above-mentioned technical document 1, a compartment is provided in the front opening of the lamp light source device, an opening serving as a ventilation opening is provided in a part of the compartment, and a metal mesh is attached to the opening. However, since the metal mesh has a thickness of several millimeters to several microns, the metal mesh has a drawback that the cooling effect is reduced due to clogging when the air from the cooling fan is contaminated.

Further, in the above-mentioned technical document 2, cooling air is forcibly sent from a part of the front opening of the lamp light source device into the lamp through the air guide path to cool the arc tube and the ventilation outlet. The cooling air exhaust hole is covered with a metal mesh or the like to prevent scattering of fragments generated when the arc tube bursts.
In both technical documents, a technique is disclosed in which a lamp is provided on a reflector of a lamp light source device to prevent scattering of lamp fragments.

However, even when such a structure is used, for example, when used as a lamp light source device of a rear projector device, the use time (lighting time) of the discharge lamp is long, and therefore the possibility that the discharge lamp is damaged becomes very high. . Further, since it is assumed that the rear type projector device is often used mainly as a television device in the home, it is possible to prevent scattering of fragments due to the breakage of the lamp light source device and further to prevent the completeness of the device. It is desirable. The simplest method for solving these problems is to use a finer mesh mesh covering the lamp light source device. However, when a fine mesh net is used, clogging occurs due to dust contained in the cooling air, and the cooling effect is reduced.

In Technical Document 3, a technique for removing dust from the outside air sucked into the main body using a filter is shown. However, as shown in this technical document 3, there is a problem that dust easily adheres to the filter itself.
The present invention provides a safe lamp light source device that increases the heat dissipation efficiency of the discharge lamp, efficiently releases the heat generated from the discharge lamp to the outside, and does not scatter outside even if the discharge lamp or the reflecting mirror is damaged. To do.

In order to solve the above problems, in the present invention, a discharge lamp, a reflector that surrounds the periphery of the discharge lamp in a parabolic shape, and reflects light in a certain direction, a light emission opening that is provided at the opening end of the reflector and guides light, A mesh-shaped opening that covers the periphery of the light-emitting opening, a transparent protective plate that is provided so as to close the space surrounded by the reflector and close the light-emitting opening, and the mesh-shaped opening A first fan for introducing cooling air into the space, an air filter provided at an intake port of the first fan, and a second fan for cooling the outer periphery of the reflector. This is a lamp light source device.

3. The lamp light source device according to claim 2, wherein a wind guide plate is provided in the mesh opening so that cooling air from the first fan flows along a surface of the reflector inside the reflector. The lamp light source device according to claim 1, wherein the first fan is a sirocco fan in claim 3, and the air filter is attached to and detached from the air inlet of the first fan in claim 4. The lamp light source device according to claim 1, wherein the lamp light source device is held and fixed as possible. Accordingly, it is possible to easily remove dust adhering to the air filter without adhering dust to the reflector of the lamp light source device.

According to the present invention, by covering the cooling wind introduction opening of the discharge lamp with a finer mesh-like protective film, even if the discharge lamp is broken for some reason, the fragments are not scattered outside, By independently providing the second fan for cooling the outer periphery of the reflector and the first fan for cooling the inside of the reflector through the mesh-shaped opening, the amount of dust enclosed in the reflector can be further reduced. Is possible. Furthermore, by providing an air filter at the inlet of the first fan that cools the inside of the reflector, the amount of dust enclosed in the reflector can be further reduced.

By providing the cooling fan of the lamp light source device independently for the first fan for internal cooling of the lamp light source device and the second fan for external cooling, the outer periphery of the reflector is cooled using more cold air. be able to. Since the second fan is for external cooling of the reflector, it is not necessary to provide an air filter. Therefore, the amount of dust attached to the air filter is reduced, which contributes to cost reduction.

The best mode for carrying out the present invention will be described in detail below with reference to the drawings, taking a lamp light source device for a projector device as an example.

1 is a cross-sectional view of the lamp light source device of the present invention, FIG. 2 is a front view of the lamp light source device of the present invention, and FIG. 3 is a cross-sectional view of the lamp light source device according to the second embodiment. FIG.
In the lamp light source device 1 of FIG. 1, the discharge lamp is fixed by one electrode of the discharge lamp 2 to the tip of a reflector 3 having a substantially bullet-shaped cross section. The other electrode 6 of the discharge lamp 2 is led out of the reflector 3 through an electrode hole formed in a part of the outer periphery of the reflector 3 and connected to a power source.

A mesh-like opening 4 is provided in the circumference of the open part of the reflector 3, and further, when the discharge lamp 2 is damaged for some reason, debris scatters outside the reflector 3 and scatters to other parts of the device. However, the inside of the discharge lamp is hermetically sealed with a transparent protective plate 5 so as not to damage other parts of the device.
The light emitted from the discharge lamp 2 is reflected by a reflector 3 made of a material called a cold mirror, which reflects only visible light, passes through the transparent protective plate 5 as a light beam, and then a light beam such as a light tunnel. It is sent to a processing device (not shown).

On the other hand, the fine mesh-shaped opening 4 provided in the opening of the reflector 3 covers the whole or part of the circumference of the mesh-shaped opening 4 with a mesh-shaped net, and further from a part of the mesh-shaped opening 4. Cooling air is sealed inside the reflector 3 by the first internal cooling fan 11.
Since the first fan 11 for internal cooling only has to cool the inside of the lamp, the air volume need not be so large. The air that has been cooled and heated inside the reflector 3 is discharged from the other part of the mesh-like opening 4 to the outside of the reflector 3.

A front view of the lamp light source device 1 and the first fan 11 for internal cooling is shown in FIG. As is apparent from the figure, dust is blocked by a filter 12 so that dust does not enter the reflector 3 at the air intake port of the first fan 11 for internal cooling. The filter 12 is detachably equipped, and it is desirable to remove and clean it from time to time. Further, since the filter 12 of the first fan 11 for internal cooling may have a relatively small air volume, it is preferably a filter having a fine dustproof density.
Further, this filter 12 has only one stage in FIG. 2, but it may be configured in two stages or more.

On the other hand, since the reflector 3 of the lamp light source device 1 becomes very hot, it is necessary to cool the outside of the reflector. In order to cool the reflector from the outside, the second fan 21 cools the reflector. Since this second external cooling fan 21 is not related to the luminous flux to the light source of the lamp, it does not require much attention to dust, and a normal cooling fan is sufficient.
The entire lamp light source device 1 is covered with a scattering prevention net to prevent the fragments from scattering into the device when the reflector is broken, but is not shown in the figure.

FIG. 3 shows another embodiment of FIG. In the figure, an air guide plate 22 is provided to guide air into the lamp of the first fan 11. By the action of the air guide plate 22, the wind of the first fan 11 is guided in the direction of the discharge lamp 2 by the air guide plate 22, and the cooling efficiency of the discharge lamp 2 is increased.

1 and 3, the light emitted from the discharge lamp 2 is focused according to the designed focal point of the reflector 3. At this time, the light having a focusing angle of about 60 degrees or less at the reflector 3 is projected. It has been confirmed by experiments that the ratio that contributes to the projection angle is extremely large, and it has been confirmed that light outside from 60 degrees does not contribute much to the projection brightness of the projection projection image. Designed so that there is nothing blocking the light at the location.

The preferred embodiment of the present invention has been described above. The present invention is not limited to the above-described embodiment, and is particularly limited to the drawings such as the position, size, air volume, size of the air guide plate, and angle of the first and second fans for cooling the discharge lamp. Is not to be done.

Since the lamp light source device according to the present invention has a high cooling effect, the projection operation can be continuously performed for a long time, and is optimal for use in a television device or the like of a rear projection device.

These are the cross-sectional views of the lamp light source device of the present invention. These are the front views of the lamp light source device of this invention. These are the cross-sectional views of the lamp light source device according to the second embodiment.

Explanation of symbols

1 is a lamp light source device 2, a discharge lamp 3, a reflector 4, an opening 5, a transparent protective plate 6, a discharge lamp electrode 11, and a first fan 12 for internal cooling are detachable. The filter 21 is an external cooling second fan 22 is an air guide plate

Claims (4)

A discharge lamp, a reflector that surrounds the discharge lamp in a parabolic shape and reflects light in a certain direction, a light emission opening that is provided at the opening end of the reflector and guides light, and covers the periphery of the light emission opening A mesh-shaped opening, a transparent protective plate provided so that the space surrounded by the reflector and the mesh-shaped opening is a sealed space, and the light-emitting opening is closed; A lamp light source device, comprising: a first fan that encloses air, an air filter that covers an air inlet of the first fan, and a second fan that cools an outer periphery of the reflector. 2. The air guide plate provided in the mesh-shaped opening portion so that cooling air from the first fan flows along a surface inside the reflector inside the reflector. Lamp light source device. 2. The lamp light source device according to claim 1, wherein the first fan is a sirocco fan. 2. The lamp light source device according to claim 1, wherein the air filter is detachably held and fixed to the air inlet of the first fan.

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