JPH07281296A - Light source device and projection type display device - Google Patents

Abstract

PURPOSE:To prolong the life of a light source device and projection type display device provided with a light emitting section and its supporting sections by efficiently cooling the heat generation of a light emitting section. CONSTITUTION:The light emitting section 2 emits light to generate heat. The supporting sections 3, 4 extend from the light emitting section 2. Blasting means 15, 16 generate the flow of the cooling wind 17 and cool the light emitting section 2. The supporting sections 3, 4 have short side parts 3a and long side parts 3b. The long side parts 3b of the supporting sections 3, 4 exist along the direction where the cold wind 17 flows and the short side parts 3a of the supporting sections 3, 4 exist along the direction perpendicular to the flow direction of the cold wind 17. A chip 11 is formed at the peak 2a of the light emitting section 2. A heat insulating film 14 of electrodes is fixed to the upper part 3a of the upper part 2b and supporting part 3 of the light emitting section 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device and a projection type display device, and more particularly to a light source device provided with a light emitting part and its supporting part and a projection type display device using this light source device.

In general, a discharge light source such as a halogen lamp or a metal halide lamp is used for a light source device of a projection display device such as a liquid crystal projector. The luminous efficiency of this metal halide lamp is 80 lm /
It is more than 3 times as expensive as that of W and halogen lamps. Further, the color temperature of the metal halide lamp is 5000 to 7,000 K, which is higher than that of the halogen lamp, and the life thereof is as long as about 200 hours. For these reasons, metal halide lamps have come to be widely used in projection display devices.

[0003]

2. Description of the Related Art A conventional metal halide lamp is shown in FIG. The metal halide lamp 19 includes a light emitting portion 2 which forms a light emitting space 1, a support portion 3 which supports the light emitting portion 2,
4, a pair of electrodes 5 and 6 enclosed in the supporting portions 3 and 4 and protruding into the light emitting space 1, encapsulation foils 7 and 8 connected to the electrodes 5 and 6, and connection to the encapsulation foils 7 and 8. The lead wires 9 and 10 and the chip 11 which is a trace of the inlet for introducing the light emitting member into the light emitting space 1.

The metal halide lamp 19 is
It is manufactured by a step of forming the electrodes 5 and 6 in the light emitting space 1 and a step of introducing a light emitting member into the light emitting space 1.

Specifically, first, the electrode 5 (6) and the metal foil 7
(8) and the lead wire 9 (10) are connected to each other to form two wires. The electrodes 5 and 6 of this connection are inserted from both sides of the transparent quartz tube so as to face each other. A quartz thin tube is previously connected to the center of the quartz tube. Next, the thickness directions of the metal foils 7 and 8 are aligned while the distance between the tips of the electrodes 5 and 6 facing each other is separated by a predetermined distance (for example, several mm or more). Further, the projection direction of the quartz thin tube projecting from the quartz tube is aligned with this thickness direction.

Next, to prevent the metal foils 7 and 8 from being deformed,
Heat and pressure are applied to both ends of the quartz tube to crush and seal both ends of the quartz tube. As a result, the central portion of the quartz tube becomes the light emitting portion 2, and both ends of the quartz tube become the supporting portions 3 and 4. A light emitting space 1 is formed in the light emitting portion 2. Electrodes 5 and 6 are opposed to and protrude from the light emitting space 1.
Further, in the supporting portions 3 and 4, a part of the electrodes 5 and 6, the encapsulating foils 7 and 8 and the lead wires 9 and 10 are encapsulated.

Since the quartz tube is crushed in the thickness direction of the metal foil so that the metal foils 7 and 8 are not deformed, the supporting portions 3 and 4 are perpendicular to the thickness direction of the encapsulating foils 7 and 8. In addition to having a flat surface, the short sides (3
a, 4a) and long side portions (3b, 4b) are formed.

Next, in the step of introducing the light emitting member into the light emitting space 1, a mercury-based
A rare earth-based and alkali metal-based light emitting member is introduced. After this introduction, the unnecessary quartz capillary is cut and sealed. This introduction port trace has a thin portion and remains as a thermally weak chip 11. The chip 11 is formed in a direction perpendicular to the thickness direction of the encapsulating foils 7 and 8.

This metal halide lamp 19 is shown in FIG.
As shown in (A), the chip 11 is fixed in the horizontal direction, and is fixed to the reflector 12 to form the metal halide light source device 20. The reflector 12 is formed with a lower cut portion 12a and an upper cut portion 12b.
Also, the opening of the reflector 12 is the UV / IR filter 1
Enclosed by 3. In such a state, the conventional metal halide light source device 20 is incorporated in the projection display device.

Then, the metal halide lamp light source device 2
0 is used in the projection display device in a state close to natural air cooling, or in a state where the air is slightly blown through the cut portions 12a and 12b of the reflector 12 and can be regarded as almost natural air cooling.

This projection display device illuminates a liquid crystal panel by using a light source device 20, modulates the illumination light by the liquid crystal panel, and projects this on a screen to obtain a magnified image.

[0012]

However, in the conventional light source device 20, the metal halide lamp 19 is set to UV.I.
The R filter 13 and the reflector 12 are almost hermetically sealed so that the heat radiation of the light emitting portion 2 made of transparent quartz is insufficient. Therefore, when the output of the metal halide lamp 19 is increased, there is a problem that the temperature of the entire light emitting unit 2 (upper part and lower part) rises to a value at the operating temperature limit, for example, 930 ° C. or higher. As a result, the quartz on the inner wall of the light emitting portion 2 reacts with the light emitting member in the light emitting portion 2, and the devitrification phenomenon of the light emitting portion 2 occurs. The devitrification diffuses the light emitted from the light emitting unit 2. Therefore, the light collection rate is reduced. Along with this decrease, the illuminance also decreased.

When the temperature of the light emitting section 2 rises and the reaction between the quartz tube which is the light emitting section 2 and the light emitting member becomes vigorous, the light emitting section 2 expands. Therefore, the thickness of the light emitting unit 2 becomes thin. As a result, the deterioration of the light emitting unit 2 proceeds very quickly. The life of the metal halide light source device 20 was very short.

Therefore, the conventional light source device 20 has a problem that the temperature of the entire light emitting portion 20 rises above the value of the operating temperature limit and the life thereof is extremely shortened. Further, the life of the projection type display device using the light source device 20 is similarly shortened.

Further, the reflector 1 is heated by the heat of the light emitting section 2.
Since the air in the upper part of 2 was warmed, the temperature of the upper part of the light emitting part 2 was 100 to 200 ° C. higher than that of the lower part. For this reason, it is desirable to attach the chip 11 that is thermally weaker than the light emitting unit 2 to the lower portion of the light emitting unit 2 as much as possible.

However, some projection display devices have both a floor-standing (orientation) use that is placed upright on the floor and a ceiling-mounted use where the top and bottom are reversed. Therefore, even if the chip 11 in the normal use state is provided below the light emitting unit 2, if the chip 11 is used upside down, the light emitting unit 2 provided with the chip 11 is used.
The temperature of the part becomes high. In order to prevent this, the chip 11 is provided so as to project in the horizontal direction from the light emitting unit 2.

Further, even in a projection type display device dedicated to floor placement,
The metal halide lamp light source device 20 has a good vertical contrast. For this reason, it is easy to make a mistake in assembling into the projection display device. Even if this incorporation error occurs, chip 1
1 so that 1 is not located in the high temperature part of the light emitting part 2.
1 was arranged right next to the light emitting part 2. That is, the chip 11 was provided at an intermediate position between the high temperature portion and the low temperature portion of the light emitting unit 2.

On the other hand, in order to cool the light emitting part 2 made of quartz, a predetermined wind speed is applied from the cut part 12b of the reflector 12
It is conceivable to blow the air volume locally. For example,
In the case of the 250 W metal halide lamp 19 with the reflector 12, the wind speed is 3 m / sec or more, and the air flow rate is 0.5.
At least 1 liter / second is blown to the light emitting unit 2 made of quartz. As a result, the temperature of the upper portion of the light emitting unit 2 becomes lower than the operating temperature limit.

However, even if the light emitting section 2 is cooled in this way, as shown in FIG. 5, the flat support section 3 blocks the air flow to the back side of the light emitting section 2 and the support section 3, and the support section does not flow. The temperature on the back side of 3 did not decrease. That is, the light emitting unit 2
In the above, the temperature of the portion (lower part of the light emitting portion 2) not facing the flow of air was higher than the operating temperature limit. Therefore, even if the light emitting unit 20 is simply cooled, the lower part of the light emitting unit 20 is not cooled, and the light source device 20 and the projection display device have a short life.

Further, since the chip 11 is not sufficiently cooled, the chip 11 is easily damaged, and the life of the light source device 20 and the projection display device is shortened.

Therefore, the present invention has been made in view of the above-mentioned problems, and by efficiently cooling the heat generation of the light emitting portion,
An object of the present invention is to provide a light source device having a long life and a projection display device using the light source device.

[0022]

The above problems can be solved by the following constitutions of the invention.

The invention according to claim 1 is provided with a light emitting part which emits light and generates heat, a support part extending from the light emitting part, and an air blowing means for generating a flow of cooling air to cool the light emitting part. In the light source device, wherein the support portion is arranged so as to cross the flow of the cooling air, the support portion has a cross-sectional shape having a short side portion and a long side portion, and the long side portion. The light source device is configured such that the length direction of is inclined by a predetermined angle from the position perpendicular to the flowing direction of the cooling air.

The invention according to claim 2 is configured such that the supporting portion is arranged such that the angle between the lengthwise direction of the long side portion of the supporting portion and the flowing direction of the cooling air is 45 ° or less. It is a light source device.

According to a third aspect of the present invention, the support portion has a short side portion and a long side portion, and the long side portion of the support portion is located along the cooling air flow direction. The light source device is configured by arranging the short side portion of the support portion along a direction perpendicular to the flowing direction of the.

According to a fourth aspect of the present invention, the support portion extends from the light emitting portion in the horizontal direction, the long side portion of the support portion is located along the vertical direction, and the short side portion of the support portion is in the horizontal direction. It is a light source device that is configured along with.

According to a fifth aspect of the present invention, there is provided a light source device in which a chip is projected from the surface of the light emitting portion and the chip is opposed to the flow of cooling air.

A sixth aspect of the invention is a light source device in which the chip is located on the top of a light emitting portion.

The invention according to claim 7 is a light source device, wherein a heat insulating film is provided on a part of at least one of the light emitting portion and / or the supporting portion on the side facing the flow of the cooling air. .

The invention of claim 8 is a light source device, wherein the heat insulating film is provided on the light emitting portion and the support portion.

According to a ninth aspect of the present invention, the light source device according to any one of the first to eighth aspects, color separation means for separating the light into three primary colors, and each of the separated lights. Image superimposing means for superimposing image information corresponding to the color of light, and light for superimposing image information by this image superimposing means are combined,
A projection-type display device including a color synthesizing unit for generating an image and a projection lens for projecting the generated image on a screen.

[0032]

As described above, in the light source device according to the invention of claim 1, the supporting portion has a cross-sectional shape having a short side portion and a long side portion, and the long side portion The length direction is arranged so as to be inclined at a predetermined angle from a position perpendicular to the flowing direction of the cooling air. Therefore, the cooling air is hard to be blocked by the support portion. As a result, the heat generation of the light emitting unit is efficiently cooled. Therefore, the temperature of the light emitting portion can be suppressed below the operating temperature limit. Therefore, the light emitting unit can be efficiently cooled, and the life of the light source device is extended.

Further, in the light source device according to the second aspect of the present invention, the support is provided so that the angle between the lengthwise direction of the long side portion of the support and the flowing direction of the cooling air is 45 ° or less. Parts are arranged. Therefore, the cooling air can sufficiently cool the support portion.

Further, in the light source device according to the invention of claim 3, the long side portion of the support portion is along the direction in which the cooling air flows, and the short side portion of the support portion is perpendicular to the direction in which the cooling air flows. Along the right direction. For this reason, the resistance of the cooling air flow can be reduced as compared with the case where the long side portion of the support portion faces the cooling air flow.

Further, in the light source device according to the invention of claim 4, the support portion extends from the light emitting portion in the horizontal direction, and the long side portion of the support portion is positioned along the vertical direction, and the support is provided. Since the short side portion of the portion is located along the horizontal direction, the cooling air flows downward. Therefore, the ascending airflow due to the heat generation of the light emitting unit is obstructed by the flow of the cooling air.

Further, in the light source device according to the fifth aspect of the present invention, the tip projects from the surface of the light emitting portion, and the tip faces the flow of the cooling air. This chip has a sealing gap between the introductions for introducing the light emitting member to the light emitting section, and is therefore thermally weaker than the light emitting section. Since such chips face the flow of cooling air, the chips are sufficiently cooled. As a result, the chip does not get damaged due to the heat generated by the heat generating portion. Therefore, the life of the light source device is extended.

Further, in the light source device according to the invention of claim 6, since the chip is located on the top of the light emitting portion, the cooling air flows downward. That is, the chip is located on the upstream side of the cooling air. Therefore, even if the light source device is used upside down, the chip is sufficiently cooled and is not damaged.

A light source device according to a seventh aspect of the invention is
A heat insulating film is provided on a part of at least one of the light emitting unit and / or the supporting unit on the side facing the flow of the cooling air. Therefore, it is possible to set the temperature of the light emitting unit to a predetermined temperature.

Further, in the light source device according to the invention of claim 8, the heat insulating film is provided on the upper part of the light emitting part and the upper part of the supporting part. Therefore, the cooling air flows downward. That is, the heat insulating film is located on the upstream side of the cooling air. Therefore, the temperature of the lower portion of the light emitting portion can be efficiently cooled without extremely lowering the temperature of the upper portion of the light emitting portion.

Further, in the projection type display device according to the invention of claim 9, since the efficiently cooled light source device is used, the life of the light source device is extended. Therefore, the life of the projection display device is extended.

[0041]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of a light source device which is an embodiment of the present invention. FIG. 1A is a perspective view, and a part of the view is cut for the sake of explanation. FIG. 1B is a front view of FIG. 1A viewed from the B direction. FIG. 1 (C) corresponds to FIG. 1 (B) by C.
It is a front view which abbreviate | omitted the filter 13 while seeing from a direction. In the figure, components having the same configurations as those shown in FIGS. 3 and 4 are designated by the same reference numerals and described.

This light source device 30 is provided with the same one as the metal halide lamp 19 of FIG. 3, but the protruding direction of the chip 11 is directed upward unlike the case shown in FIG. 4 of the prior art. In this metal halide lamp, various kinds of metal vapor are present in a discharge arc of mercury vapor to emit a light spectrum peculiar to the metal. The metal halide lamp includes a light emitting unit 2 that forms a light emitting space. Supporting portions 3 and 4 extend from the light emitting portion 2. The supporting portions 3 and 4 support the light emitting portion 2. This support part 3, 4
A pair of electrodes protruding into the light emitting space are enclosed in the. Two encapsulation foils are connected to the pair of electrodes, respectively. Lead wires 9 and 10 are connected to the respective encapsulation foils. Each of the lead lines 9 and 10 is connected to a predetermined electric circuit of a projection display device described later. Further, a chip 11 which is a trace of an introduction port for introducing the light emitting member into the light emitting space is formed in the light emitting section 2. And the output of this metal halide lamp is 250
W.

The support portions 3 and 4 of the metal halide lamp 19 are sealed by crushing a quartz tube having a circular cross section into an elliptical shape. As a result, the cross sections of the support portions 3 and 4 are formed in a substantially rectangular shape, and the support portions 3 and 4 have short side portions 3a and 4 respectively.
a and the long side portions 3b and 4b are formed. That is,
The thin portions of the crushed support portions 3 and 4 are the short side portions 3a and 4a, and the thick portions thereof are the long side portions 3.
b and 4b.

Then, in the light emitting portion 2, the supporting portions 3, 4
The chip 11 is projected in a direction perpendicular to the direction in which is crushed. In addition, a heat insulating film 14 is formed on the upper portion 2b of the outer surface of the light emitting portion 2 and the upper portion 3c of the outer surface of the support portion 3 around the electrode 5 (see FIG. 3). In other words, the heat insulating film 14 is attached to the left side of the chip 11 in the figure.

This metal halide lamp is fixed to the reflector 12 with the chip 11 facing upward in the vertical direction. That is, the chip 11 is located on the top 2 a of the light emitting unit 2. The reflector 12 is a reflector for reflecting the light from the metal halide lamp 19 and radiating the light uniformly. This reflector 12 has a lower cut portion 12
a and the upper cut portion 12b are formed. The lower cut portion 12a and the upper cut portion 12b are arranged in upper and lower portions in correspondence with the rectangular display area of the liquid crystal panel which constitutes the projection display device.
It is a cut piece. Further, the opening (expansion) of the reflector 12 is sealed by the UV / IR filter 13. The UV / IR filter 13 blocks ultraviolet rays and infrared rays.

In the upper cut portion 12b of the reflector 12,
An outlet for the duct 15 is provided. An axial fan 16 is attached to the inlet of the duct 15. The axial fan 16 generates cooling air 17 having a wind speed of 3 m / s or more and an air volume of 0.5 liter / s or more. This cooling wind 1
The temperature of 7 is room temperature. And the cooling air 17 is duct 1
The light passes through the inside of the reflector 5, reaches the inside of the reflector 12, and is sent to the outside of the light source device 20 from the lower cut portion 12a. Further, the supporting parts 3 and 4 are arranged so as to cross the flow of the cooling air 17, and the heat insulating film 14 is provided on the upper part (2b) of the light emitting part 2 and the supporting part 3 which face the flow of the cooling air 17. Top (3
It is provided only in c).

The cooling air 17 sent to the inside of the reflector 12 prevents the ascending air current from being generated due to the heat generation of the light emitting part 2, and also the upper part 2b (chip 1) of the light emitting part 2 which has generated heat.
(Including 1), the upper portion 2b of the light emitting unit 2 is cooled. As a result, the temperature of the upper portion 2b of the light emitting section 2 does not reach the value of the operating temperature limit of the metal halide lamp 19. Further, when the cooling air 17 excessively cools the light emitting unit 2 and the supporting unit 3 near the electrode 5 (see FIG. 3),
By increasing the thickness of the heat retaining film 14, excessive cooling is prevented.

Further, since the chip 11 is located on the top 2b of the light emitting section 2, it efficiently hits the cooling air 17. Therefore, the chip 11 is sufficiently cooled. As a result, the chip 11 is not damaged by the heat generated by the light emitting unit 2. Therefore, the life of the light source device 30 is not shortened due to the damage of the chip 11.

Then, the cooling air 17 also comes into contact with the supporting portion 3. The support portion 3 is provided so as to reduce the resistance of the flow of the cooling air 17. Specifically, as shown in FIG. 1C, the long side portion 3b of the support portion 3 is provided along the direction in which the cooling air 17 flows. In other words, the support portion 3 is provided along the direction perpendicular to the flowing direction of the cooling air 17.
Is provided with a short side portion 3a. The short side portion 3a of the support portion 3 tends to change the flow direction of the cooling air 17. However, since the short side portion 3a of the support portion 3 is very thin, the flow resistance of the cooling air 17 is very small. As a result,
The cooling air 17 flows downward with almost no change in the flowing direction. The cooling air 17 also efficiently goes around the lower part of the light emitting unit 2 (the side opposite to the chip 11). As a result, the light emitting unit 2
The lower part of is cooled sufficiently.

Further, since the heat insulating film 14 is not provided below the light emitting portion 2, the heat radiation effect of the cooling air 17 below the light emitting portion 2 is improved. Therefore, the temperature of the lower portion of the light emitting unit 2 drops. Therefore, the temperature of the lower portion of the light emitting unit 2 does not reach the value above the operating temperature limit. The heat insulating film 14 may be fixed to the lower portion of the light emitting unit 2 depending on the set temperature of the light emitting unit 2.

Furthermore, in the above embodiment, the long side portion 3
The support portion 3 is provided along the lengthwise direction of b along the direction in which the cooling air 17 flows, and this configuration is the optimum one.
If the angle between the length direction of the long side portion 3b and the flowing direction of the cooling air 17 is 45 ° or less, a sufficient cooling effect can be obtained.

Therefore, in the light source device 30, the temperature of the entire light emitting portion 2 (upper and lower portions) can be lowered from the value of the operating temperature limit by the cooling air 17. It is also possible to make the temperature of the entire light emitting unit 2 uniform by controlling the presence or absence of the heat insulating film 14 or the thickness of the heat insulating film 14.

As a result, the light emitting section 2 made of transparent quartz is not devitrified, and the life of the light source device 30 is extended. The light source device 30 is incorporated in the projection display device 40 of FIG.

Next, an example of the projection type display device in which the light source device 30 is incorporated will be described with reference to FIG. The projection type display device 40 separates the light from the light source device 30 into three primary color lights R, G and B of different wavelength bands by separating optical mirror portions 41 and 42 functioning as color separating means. An image of each primary color light is generated by the image superimposing units 43, 44, 45 based on the primary color signals Er, Eg, Eb coming from the outside. Further, the images of the respective primary color lights are combined by the combining optical mirror sections 46 and 47 functioning as color combining means to obtain a color image. After this, the projection lens 4
A color image is displayed on the screen 49 arranged at a predetermined focus position by the display device 8.

Reference numerals 50 and 51 are total reflection mirrors for reflecting the primary color lights g and b to change the optical path. The image superimposing units 43 to 45 include the condenser lenses 43 a to 45 a and the analyzer 4.
3b to 45b, liquid crystal light valves 43c to 45c, and polarizers 43d to 45d.

The liquid crystal light valves 43c to 45c are
Based on the primary color signals Er, Eg, Eb, the light transmittance distribution is arbitrarily variably controlled to generate a desired image with red light (green light, blue light). The generated images of the three primary colors are combined by the combining optical mirror units 46 and 47 into one color image, which is enlarged and projected on the screen 49 by the projection optical system such as the condenser lenses 43a to 45a and the projection lens 48. To be done.

This projection type display device 40 can be placed on the floor for projection in a normal position. Further, the projection display device 40 can be hung on the ceiling with the upside-down state in the upright position reversed. Even when the projector is placed on the floor and projected, or when the projector is upside down and hung on the ceiling, the total area of the light emitting unit 2 is 930.
The temperature is below ℃. Therefore, the light emitting unit 2 does not devitrify. Therefore, the life of the light source device 30 is extended,
The life of the projection display device 40 is also extended. Moreover, since the life of the light source device 30 is extended, the projection display device 40 is
Even if it is used for more than 00 hours, the illuminance of the screen 49 and its color hardly change.

[0059]

As described above, according to the invention of claim 1, the supporting portion has a cross-sectional shape having a short side portion and a long side portion, and the length direction of the long side portion is the above. Since it is arranged at a predetermined angle from a position perpendicular to the direction in which the cooling air flows, it is difficult for the cooling air to be blocked by the support portion,
The heat generation of the light emitting unit can be efficiently cooled, the temperature of the light emitting unit can be suppressed below the operating temperature limit, and the light emitting unit can be efficiently cooled, so that the life of the light source device can be extended.

Further, according to the invention of claim 2, the supporting portion is arranged so that the angle between the length direction of the long side portion of the supporting portion and the flowing direction of the cooling air is 45 ° or less. Therefore, the cooling air can sufficiently cool the support portion.

Further, according to the invention of claim 3, the long side portion of the support portion is along the direction in which the cooling air flows, and the short side portion of this support portion is along the direction perpendicular to the direction in which the cooling air flows. Therefore, the resistance of the cooling air flow can be reduced as compared with the case where the long side portion of the support portion faces the cooling air flow.

Further, according to the invention of claim 4, the support portion extends from the light emitting portion in the horizontal direction, the long side portion of the support portion is located along the vertical direction, and the short side portion of the support portion is located. Are located along the horizontal direction, the cooling air flows downward. Therefore, the upward airflow due to the heat generation of the light emitting unit can be obstructed by the flow of the cooling air.

According to the fifth aspect of the invention, the tip projects from the surface of the light emitting portion, and the tip faces the flow of the cooling air. This chip has a sealing gap between the introductions for introducing the light emitting member to the light emitting section, and is therefore thermally weaker than the light emitting section. Since such chips face the flow of cooling air, the chips are sufficiently cooled. As a result, the chip is not damaged by the heat generated by the heat generating portion, and the life of the light source device can be extended.

Further, according to the invention of claim 6, since the chip is located on the top of the light emitting portion, the cooling air flows downward. That is, since the chip is located on the upstream side of the cooling air, even if the light source device is used upside down, the chip is sufficiently cooled and is not damaged.

According to the invention of claim 7, the heat insulating film has the light emitting portion on the side facing the flow of the cooling air, and
Alternatively, since it is provided on at least a part of at least one of the supporting portions, it is possible to set the temperature of the light emitting portion to a predetermined temperature.

Further, according to the invention of claim 8, since the heat insulating film is provided on the upper part of the light emitting part and the upper part of the supporting part, the cooling air can flow downward. Further, since the heat retaining film is located on the upstream side of the cooling air, the temperature of the upper part of the light emitting portion is not extremely lowered,
The temperature of the lower portion of the light emitting unit can be efficiently cooled.
Further, according to the invention of claim 9, since the efficiently cooled light source device is used, the life of the light source device is extended, and the life of the projection display device can be extended.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a light source device that is an embodiment of the present invention.

FIG. 2 is a configuration diagram of a projection type display device incorporating the light source device of FIG.

FIG. 3 is a plan view of a conventional metal halide lamp.

FIG. 4 is an explanatory diagram of a conventional metal halide light source device.

FIG. 5 is an explanatory diagram of a blowing method devised by the present inventor.

[Explanation of symbols] 2 light emitting part 2a top 2b upper part 3, 4 supporting part 3a short side part 3b long side part 3c upper part 5, 6 electrode 7, 8 encapsulating foil 9, 10 lead wire 11 chip 12 reflector 13 UV / IR filter 14 Thermal insulation film 15 Duct 16 Fan 17 Cooling air 30 Light source device 40 Projection display device 41, 42 Separation optical mirror 43 Image superimposing part 44, 45, 46 Synthetic optical mirror 48 Projection lens 49 Screen 50, 51 Total reflection mirror

Claims (9)

[Claims] 1. A light emitting part (2) that emits light and generates heat, a support part (3, 4) extending from the light emitting part (2), and a flow of cooling air (17) is generated to generate the light emitting part ( 2) a blower means (15, 16) for cooling the light source device, wherein the supporting parts (3, 4) are arranged so as to cross the flow of the cooling air (17). The sections (3, 4) have short side portions (3
a) and a long side portion (3b), and the length direction of the long side portion (3b) is the cooling air (17).
A light source device, wherein the light source device is arranged so as to be inclined at a predetermined angle from a position perpendicular to the flowing direction. 2. A long side portion (3) of the supporting portion (3, 4).
The support portions (3, 4) are arranged such that an angle between a length direction of b) and a flowing direction of the cooling air (17) is 45 ° or less. Light source device. 3. The support portions (3, 4) are short side portions (3).
a) and a long side part (3b), and the long side part (3b) of the support part (3, 4) is located along the flowing direction of the cooling air (17), and the cooling air (17) 3. The light source device according to claim 2, wherein the short side portions (3a) of the supporting portions (3, 4) are located along a direction perpendicular to the flowing direction of (3). 4. The supporting parts (3, 4) extend in the horizontal direction (A) from the light emitting part (2), and the long side portions (3b) of the supporting parts (3, 4) extend in the vertical direction. The light source device according to claim 3, wherein the light source device is located, and the short side portion (3a) of the support portion (3, 4) is located along the horizontal direction. 5. A chip (1) is formed from the surface of the light emitting section (2).
The light source device according to any one of claims 1 to 4, wherein 1) is projected and the chip (11) faces the flow of the cooling air (17). 6. The light source device according to claim 5, wherein the chip (11) is located on the top (2a) of the light emitting part (2). 7. The heat insulating film (14) is provided with the cooling air (17).
7. The light source device according to claim 1, wherein the light source device is provided on a part of at least one of the light emitting unit (2) and / or the supporting unit (3) on the side facing the flow. 8. The heat insulation film (14) is provided with the light emitting part (2).
Upper part (2b) and upper part (3c) of the supporting part (3)
The light source device according to claim 7, wherein the light source device is provided in 9. A light source device (30) according to claim 1, and a color separation means (41, 42) for separating the light into three primary colors.
And image superimposing means (43, 44, 45) for superimposing image information corresponding to the color of each light on the separated light, and light for superimposing image information by the image superimposing means, A projection display device comprising: a color synthesizing unit (46, 47) for generating an image; and a projection lens (48) for projecting the generated image on a screen (49).