WO2007029349A1

WO2007029349A1 - Light source device, lamp housing, lamp unit, and projection type image display device

Info

Publication number: WO2007029349A1
Application number: PCT/JP2005/020214
Authority: WO
Inventors: Kohji Miyauchi; Takuya Shimoda
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2005-09-01
Filing date: 2005-11-02
Publication date: 2007-03-15
Also published as: JP3847320B1; JP2007065507A

Abstract

An explosionproof light source device, enabling an increase in the cooling performance of a light source and a reduction in the number of parts. In the light source device (30), an inner wall member (50) formed of a first inner wall (51), a second inner wall (52), and a third inner wall is installed in a U-shaped casing (31), and a front wall (40) formed integrally with the forward part (42) of one side wall of the casing, the other side wall (60) of the casing, and a rear wall (70) are installed around the casing. The light source (21) is fitted to the inner surface (41c) of the front wall (40), and the heat of the light source (21) is radiated through the front wall (40). A circulation fan (29) is installed at the rear part (34) of the casing (31) forming the one side wall. By the operation of the circulation fan (29), air flows from the duct part (43) of the forward part (42) into the reflector (22) of the light source (21) to cool an illuminant (24) in the reflector (22), and the heated air is circulated along the periphery of the casing (31) and radiated from the other side wall (60) and the rear wall (70).

Description

Specification

LIGHT SOURCE DEVICE, LAMP HOUSING, LAMP UNIT, AND PROJECTION TYPE DISPLAY DEVICE

TECHNICAL FIELD [0001] The present invention relates to an explosion-proof light source device, a lamp housing, a lamp unit, and a projection type image display device that reduce the number of components and increase the cooling efficiency.

Background art

Conventionally, there is a projector (projection-type image display device) that projects modulated light on an image generated using a light source onto a screen to display an image on the screen. Such a projection type image display apparatus is divided into a front projection system and a rear projection system typified by a rear projection television, according to the modulation light projection system. Light sources used in projection-type image display devices are required to have high brightness for fine image display with excellent color reproducibility, and are of the discharge type such as metalno, ride lamps and high-pressure mercury lamps. A structure in which a light emitter (lamp) is attached to a concave reflector is often used.

[0003] The luminous body of the light source encloses the electrode in the tube and encloses mercury, halogen gas, etc., and the pressure inside the tube exceeds 150 atm when it is lit. A popping sound is generated, and the inclusions and the glass pieces of the tube are scattered. For this reason, there is an explosion-proof light source that closes the opening side of the reflector with a glass plate or optical lens, etc., and prevents the popping sound and leakage of inclusions.

[0004] Further, light sources are generally housed in a storage box so that the optical axis is aligned with a specified direction, and are often unitized as a light source device. When the unitized light source device is mounted in the housing of the projection type image display device, the lamp housing is arranged in the case of the projection type image display device in order to position and fix the light source device at a predetermined location according to the optical system. The

[0005] In addition, during use, the light source becomes hot as it emits light (approximately 100 ° C in the part of the tube chamber where the temperature is highest), so that the light source is cooled by passing air through the light source device. There is a light source device (see Patent Documents 1 and 2 below). In addition, the inside of the light source device is sealed to improve explosion-proof performance, and a fan that circulates the air inside the light source device is provided to cool the light source. There is also a light source device designed to do this (see Patent Documents 3 and 4 below).

Patent Document 1: Japanese Patent Laid-Open No. 2000-36214

Patent Document 2: JP 2000-36215 A

Patent Document 3: Japanese Utility Model Publication No. 2-113731

Patent Document 4: Japanese Patent Laid-Open No. 2002-75014

Disclosure of the invention

Problems to be solved by the invention

[0006] The light source devices according to Patent Documents 1 and 2 have a problem in that the explosion-proof property is inferior to that of a light source device having a sealed inside because the inside of the light source device is communicated with the outside for cooling. On the other hand, in the light source device with explosion-proof structure according to Patent Documents 3 and 4 in which the inside is sealed, air is circulated for cooling, but the circulating air comes into contact with the light source that has become hot so that the air itself Since the temperature also rises, there is a problem that the cooling efficiency decreases with the passage of time and sufficient cooling performance cannot be secured.

[0007] Furthermore, since the light source reaches the product life as it is used for a certain period, it is necessary to replace the light source every certain period. However, in the light source devices according to Patent Documents 1 to 4, the detachability for replacement is improved. There is a problem that it takes a lot of time and effort to replace the parts because there are not enough considerations.

[0008] Furthermore, the luminous body of the light source has a problem that the temperature rise caused by the light emission is different for each part and the temperature distribution is biased, so that the load due to the temperature difference received by the tube forming the luminous body is large. There is. For example, in the part of the chamber of the tube containing the electrodes, the top side (upper top) is very hot. The bottom side (lower top) does not rise so much in temperature, so there is a temperature difference between the top and bottom sides. growing. Also, in the longitudinal direction of the tube, a temperature difference occurs between one end attached to the reflector and the other end protruding from the reflector, and heat is released from the one end of the tube to the reflector, so that the temperature is kept relatively low. However, the other end of the tube has no heat conduction path, so heat is accumulated and the temperature rises. In this way, the tube of the illuminator has a temperature difference between parts, which increases the load on the tube.

[0009] The present invention has been made in view of such a problem. An explosion-proof light source device, a lamp housing, a lamp unit, and a projection-type image display device with improved cooling efficiency compared to the conventional ones. The purpose is to provide a device.

It is another object of the present invention to provide a light source device that has an improved assemblability and maintainability by reducing the number of parts.

Furthermore, an object of the present invention is to provide a light source device that optimizes the direction of airflow in the reflector so that the temperature distribution of the illuminant is not biased.

Means for solving the problem

In order to solve the above problems, a light source device according to the present invention includes a light source in which a light emitter is attached to a concave reflector, and a hexahedral storage box that stores the light source, and the storage box includes the light source described above. A front wall formed with a hole through which emitted light passes, a side wall having a circulation fan attached to the outer surface for circulating the gas in the storage box, a back wall facing the front wall, and another side wall facing the one side wall The one side wall is divided into a front part connected to the front wall and a rear part connected to the back wall, and the circulation fan is attached to an outer surface of the rear part. The front portion and the front wall are an integral member and can be removed from the storage box force, and the front portion includes a duct portion connected to a discharge port of the circulation fan, On the inner surface of the front wall, the light source It is characterized by being attached.

In the present invention, since the front wall and the front part are formed as an integral member, the number of parts constituting the light source device can be reduced as compared with the related art. In addition, the front wall and front part of the unit can be removed from the storage box, and the front part is provided with a duct part and the light source is attached to the inner surface of the front wall. Can be easily detached from the storage box, improving the assembly and maintenance of the light source device. Furthermore, since the light source is mounted on the inner surface of the front wall, the reference surface to be mounted can be clarified to reduce the accuracy error related to the optical axis of the light source, and the heat generated by the light source can be transferred to the front wall. The heat dissipation of the light source can be improved. In order to improve heat dissipation, the reflector of the light source is made of a material with good thermal conductivity (for example, aluminum, which has higher thermal conductivity than iron), and the periphery of the reflector is attached to the inner surface of the front wall. It is preferable to make it contact.

In the light source device according to the present invention, the duct portion is formed integrally with the front portion, the outer surface force of the front portion protrudes, and a handle formed integrally with the front portion is provided. Prepare And features.

In the present invention, since the duct portion and the handle are also integrally formed in the front portion, the number of parts can be further reduced, and the assembling property and the maintenance property of the light source device can be improved.

[0013] The light source device according to the present invention is characterized in that the front portion and the front wall are made of a material having a higher thermal conductivity than the rear portion.

In the present invention, the front part and the front wall, which are integral members, have higher thermal conductivity than the rear part! Because it is made of material, the heat inside the storage box due to heat generated by the light source can be smoothly transferred to the front and front walls, while a circulation fan is installed in the rear part where the thermal conductivity is lower than that of the front and front walls. Since it is installed, the heat generated inside the storage box is transferred to the circulation fan, which ensures a stable operating environment of the circulation fan.

[0014] In the light source device according to the present invention, the reflector includes a ventilation portion communicating with the inside of the reflector, and the duct portion includes a duct groove that guides gas to the ventilation portion. The cross section orthogonal to the longitudinal direction of the groove is U-shaped and includes a top groove plate portion, a side groove wall portion, and a bottom groove plate portion, and the duct groove force The gas flowing into the reflector through the ventilation portion is reflected by the reflector. The bottom groove plate portion is raised as it approaches the ventilation portion side so as to be directed upward inward.

In the present invention, the bottom groove plate portion of the duct groove that guides the gas to the vent portion of the reflector is raised as it approaches the vent portion side, so that the gas flowing into the duct groove force reflector Advances in the direction of ascending. As a result, the gas that has entered the reflector travels to the top side of the chamber part of the illuminant and almost does not flow to the bottom side, and the top side of the chamber part is intensively cooled to lower the temperature on the top side. The temperature difference between the bottom side and the top side, where the temperature is difficult to rise, is reduced, and the burden due to the temperature difference on the tube forming the light emitter is eliminated.

The light source device according to the present invention is characterized in that a bottom-side built-up portion is formed at a corner portion in a groove where the bottom groove plate portion and the side groove wall portion are continuous.

In the present invention, since the bottom-side built-up portion is formed at the corner portion in the groove where the bottom groove plate portion and the side groove wall portion are continuous, the bottom-side built-up portion is formed at the corner portion having a large resistance to airflow. The body can flow smoothly along. Therefore, the gas flowing through the duct groove is partially airflow. The gas can be smoothly introduced into the reflector by preventing the delay.

The light source device according to the present invention is characterized in that a top-side built-up portion is formed at a corner portion in a groove where the top-groove plate portion and the side groove wall portion are continuous.

In the present invention, since the top-side built-up portion is formed at the corner portion in the groove where the top-groove plate portion and the side groove wall portion are continuous, the gas flowing through the top-side corner portion is It becomes easy to flow smoothly along the section, and the gas in the duct groove can efficiently flow into the reflector through the ventilation section.

The light source device according to the present invention is characterized in that external fins extending along a peripheral direction of the storage box are formed on the outer surface of the front wall.

In the present invention, since the external fin is formed on the outer surface of the front wall, the contact area with the outer atmosphere on the outer periphery of the storage box can be increased, and the heat dissipation can be further enhanced. In addition, since the external fin extends along the peripheral direction of the storage box, for example, even if suction is performed from the direction of the other side wall of the storage box using the suction arch I fan, the gas generated by the suction arch I on the outer surface of the front wall It is not necessary to block the flow of air with external fins, and a good gas flow can be formed.

The light source device according to the present invention is characterized in that an inner fin is formed on the inner surface of the front wall.

In the present invention, since the internal fin is formed on the inner surface of the front wall, the contact area with the internal atmosphere of the storage box can be increased, and the internal atmospheric force with the increased temperature can also be applied to the front wall through the internal fin. It can be moved to contribute to lowering the temperature of the internal atmosphere.

[0020] The light source device according to the present invention is characterized in that the inner fin extends orthogonally to the outer fin.

In the present invention, since the internal fins extend perpendicularly to the external fins, the internal fins extend in the vertical direction of the storage box. Inside the storage box, the inner surface of the front wall is exposed to a place where the influence of the circulating fan does not reach, and natural convection occurs at such a place due to the temperature of the gas present at that place. Since the direction of natural convection is upward, the natural fins are not hindered by extending the internal fins in the vertical direction, and the heat of the gas forming the natural convection is taken away by the internal fins along the natural convections. ! Can be taken and moved to the front wall. The light source device according to the present invention is characterized in that duct fins are formed on the surface of the duct portion.

In the present invention, since the duct fin is formed on the surface of the duct portion, the heat dissipation of the duct portion can also be improved. In addition, the surface of the duct part corresponds to either or both of the inner surface of the duct part and the outer surface of the duct part. When duct fins are provided on the inner surface of the duct part, the gas flowing in the duct part By increasing the contact area with the duct fin, it is possible to take away the heat of the gas with duct fins. Further, when the duct fin is provided on the outer surface of the duct portion, the contact area with the outer atmosphere of the duct portion can be increased, and the heat radiation efficiency can be improved. The duct fin provided on the inner surface of the duct portion is preferably extended along the flow in the duct portion so as not to disturb the gas flow. The duct fin provided on the outer surface of the duct portion is free from natural convection. In order not to obstruct, it is preferable to extend along the direction of natural convection (top and bottom direction of the storage box).

The light source device according to the present invention is characterized in that the other side wall and the back wall can be removed from the storage box.

In the present invention, the other side wall and the back wall can be removed from the storage box. Therefore, when both walls are removed, the periphery of the storage box is opened, and the accessibility to the inside of the storage box can be improved. Assembling and maintenance can be further improved.

The light source device according to the present invention is characterized in that the other side wall and the back wall include an outer fin and an inner fin formed on the outer surface and the inner surface, respectively.

In the present invention, since the other side wall and the back wall are provided with the outer fin and the inner fin, the contact area with the outer atmosphere and the inner atmosphere can be increased also on the other side wall and the back wall of the storage box, and the gas in the storage box can be increased. Heat transfer from the wall to the other side wall and back wall, and heat dissipation from the heat transferred to the other side wall and back wall can be enhanced outside the storage box.

[0024] In the light source device according to the present invention, the outer fin and the inner fin are plurally formed with an interval between them, and the interval between the inner fins is narrower than the interval between the outer fins. And features.

[0025] In the present invention, by providing a plurality of outer fins and inner fins, it is possible to further increase the amount of heat transfer in the storage box and the heat dissipation outside the storage box. Also, the distance between the inner fins is narrower than the distance between the outer fins. More gas can be provided, and by circulating the gas with a circulation fan, the gas power that has been heated by cooling the light source can take away a lot of heat. Although the resistance to circulate the gas is increased by reducing the distance between the inner fins, the inside of the storage box is a closed space, so that airflow noise leaks out of the storage box. It is possible to circulate the gas using a circulation fan with a large horsepower without worrying.

The light source device according to the present invention has a first inner wall facing the inner surface of the other side wall with a space, a second inner wall facing the back wall with a space, and a space between the rear portion. The circulation fan has a first space formed between the other side wall and the first inner wall, a first wall formed between the back wall and the second inner wall. The gas that sequentially passes through the second space and the third space formed between the rear portion and the third inner wall is sucked.

[0027] In the present invention, the first inner wall, the second inner wall, and the third inner wall are provided, and the gas is caused to flow in order from the first space to the third space by the circulation fan. The gas flowing through the space travels in contact with the inner surfaces of the other side wall and the back wall and is sucked into the circulation fan. Since the other side wall and back wall of the storage box have a lower temperature than the gas that cooled the light source, the gas continuously contacts the inner surfaces of the other side wall and back wall while passing through the first space and the second space. As a result, heat conduction that the heat of the gas moves to the other side wall and the back wall is continuously generated, and it is possible to efficiently remove the heat from the gas. As a result, the high-temperature light source can be cooled again with the gas that has been deprived of heat and the temperature has decreased, and sufficient cooling performance can be maintained even with a light source device having a sealed storage box.

[0028] The light source device according to the present invention includes a first inner wall facing the inner surface of the other side wall with a space, a second inner wall facing the back wall with a space, and a space between the rear portion. The circulation fan has a first space formed between the other side wall and the first inner wall, a first wall formed between the back wall and the second inner wall. 2 spaces, and the gas that sequentially passes through the third space formed between the rear portion and the third inner wall are sucked, and the other side wall and the back wall are formed on the outer surface and the inner surface, respectively. The second inner wall and the Z or third inner wall are provided with a protrusion protruding so as to abut on the front end of the inner fin. [0029] In the present invention, the gas is sequentially passed through the first space, the second space, and the third space formed by the first inner wall, the second inner wall, and the third inner wall. The gas can be brought into contact with the inner surface of the wall reliably, and the other side wall and back wall are provided with outer fins and inner fins. The light source can be cooled down stably. In addition, since the protrusions against which the tip of the inner fin abuts are provided on the second inner wall and Z or the third inner wall, even if the other side wall and Z or the back wall can be removed from the storage box, they are in frictional engagement by contact. The other side wall and the Z or back wall can be prevented from accidentally falling off, and further, heat conduction from the second inner wall and the Z or third inner wall to the other side wall and the Z or back wall can also occur through the contact point, Contributes to lowering the temperature of components in the storage box.

[0030] In the light source device according to the present invention, the first inner wall, the second inner wall, and the third inner wall are integral members, and the storage box force can be removed.

In the present invention, the first inner wall, the second inner wall, and the third inner wall are made into an integral member so that the storage box force can be removed, so that the number of parts constituting the light source device can be reduced, and The ease of assembly and maintenance in the storage box can be improved.

[0031] A lamp housing according to the present invention includes a housing portion to which a light source device is mounted, and an opening / exit through which the light source device is moved in and out, and light emitted from the light source device mounted inside is passed through the housing. In a lamp housing in which a light passage opening is formed, a suction fan attached to a location facing the entrance / exit of the housing portion so as to suck the gas inside the housing portion, and outward from the periphery of the entrance / exit A widening suction guide section.

[0032] In the present invention, the suction fan is provided opposite to the entrance / exit of the housing part, and the suction guide part extending outward from the peripheral edge of the entrance / exit is provided, so that the suction fan is located outside the entrance / exit when operated. The gas is guided by the suction guide and can be drawn into the inlet / outlet housing, and a larger amount of gas flows from the inlet / outlet to the suction fan. Therefore, a large amount of gas flows in the peripheral direction of the storage box of the light source device attached to the housing portion, and the cooling performance of the storage box can be improved as compared with the conventional case. In addition, the sucking arch I guide unit attaches the light source device to the housing part when the light source device is It also serves as a guide leading in, and the light source device can be easily mounted.

[0033] A lamp unit according to the present invention includes the light source device and the lamp housing, and the light source device is mounted on a housing portion of the lamp housing.

In the present invention, the light source device that dissipates heat from the surroundings of the storage box is mounted on the housing of the lamp housing described above, so if heat is efficiently taken from the light source device and discharged to the outside! / Therefore, it is possible to realize a lamp unit that can form a heat transfer cycle and secure good cooling performance for a light source device that maintains an explosion-proof structure.

[0034] The projection-type image display device according to the present invention includes the lamp unit, a spatial light modulation element that generates modulated light according to an image using light emitted from the light source power of the lamp unit, and the spatial light modulation. A projection lens that projects the modulated light generated by the element onto the projection target; and a housing that houses the lamp unit, the spatial light modulation device, and the projection lens, and the housing faces an entrance / exit of the lamp housing. Characterized by having an opening formed at a location

[0035] In the present invention, the lamp unit having the above-described configuration is provided, and an opening is provided in a portion of the housing that faces the entrance and exit of the lamp housing. Therefore, when the suction fan of the lamp housing operates, Gas can be sucked into the housing in the housing through the opening, allowing the gas to flow continuously and stably around the light source device. The light source device can be maintained at an optimum temperature.

The invention's effect

[0036] In the present invention, since the front wall and the front part are formed as an integral member, the number of parts constituting the light source device can be reduced, and the integrated front wall and the front part are removed from the storage box. Since the front part is provided with a duct part and the light source is attached to the inner surface of the front wall, the duct part and the light source can be easily detached from the storage box together with the front part and the front wall. Can be improved.

In the present invention, the duct portion and the handle are also formed integrally with the front portion, so that the number of parts can be further reduced and the assemblability and the maintainability of the light source device can be improved. In the present invention, the front part and the front wall, which are integral members, are made of a material having a higher thermal conductivity than the rear part, so that the heat generated by the light source can be smoothly transferred to the front part and the front wall. In addition, since the circulation fan is attached to the rear part, which has a lower thermal conductivity than the front part and the front wall, it is difficult to transfer heat to the circulation fan and a stable operating environment of the circulation fan can be secured.

[0038] In the present invention, the bottom groove plate portion of the duct groove that guides the gas to the vent portion of the reflector is raised as it approaches the vent portion side, so that the gas flowing into the duct groove force reflector It is possible to eliminate the large temperature difference in the illuminant by intensively cooling the part of the arc tube where the temperature becomes high by proceeding in a rising direction.

In the present invention, since the bottom-side built-up portion is formed in the corner portion in the groove where the bottom groove plate portion and the side groove wall portion are continuous, the corner portion having a large resistance to the air current is formed along the bottom-side built-up portion. A gas can flow smoothly and an airflow suitable for cooling can be formed.

In the present invention, since the top-side built-up portion is formed at the corner portion in the groove where the top-groove plate portion and the side groove wall portion are continuous, the gas flowing through the top-side corner portion is along the top-side built-up portion. It can flow smoothly and form an airflow suitable for cooling.

[0039] In the present invention, since an external fin extending along the peripheral direction of the storage box is formed on the outer surface of the front wall, the contact area with the outer atmosphere is increased, and the heat dissipation is further improved. In addition to being enhanced, good heat dissipation can be ensured by preventing the external fins from blocking the airflow that flows outside the front wall of the storage box.

[0040] In the present invention, the internal fins extend perpendicularly to the external fins, so that natural convection at a location that is not affected by the circulation fan in the storage box is not hindered by the internal fins. The internal fins can efficiently take and take heat.

In the present invention, since the duct fin is formed on the surface of the duct portion, the heat dissipation of the duct portion can be improved.

[0041] In the present invention, the other side wall and the back wall are made removable by the storage box force. When the wall is removed, the periphery of the storage box opens, so that the accessibility to the storage box can be improved, and the assembly and maintenance of the light source device can be further improved.

[0042] In the present invention, by providing a plurality of outer fins and inner fins, the amount of heat transfer in the storage box and heat radiation to the outside of the storage box can be further increased. The spacing between the two fins is narrower than the spacing between the outer fins, so that the heat conduction efficiency can be improved with a large number of inner fins. Can be suppressed.

[0043] In the present invention, the first inner wall, the second inner wall, and the third inner wall are provided, and the circulation fan causes the gas to flow in order from the first space to the third space. The gas flowing through the space travels while making contact with the inner surfaces of the other side wall and the back wall, and the storage box can also efficiently remove heat from the gas force, and even a light source device having a sealed structure storage box is sufficient. Coolability can be maintained.

[0044] In the present invention, the gas is sequentially passed through the first space, the second space, and the third space formed by the first inner wall, the second inner wall, and the third inner wall. The gas can be brought into contact with the inner surface of the wall reliably, and the other side wall and back wall are provided with outer fins and inner fins. The light source can be cooled down stably. In addition, since the protrusions against which the tip of the inner fin abuts are provided on the second inner wall and Z or the third inner wall, even if the other side wall and Z or the back wall can be removed from the storage box, they are in frictional engagement by contact. It is possible to prevent a situation in which the other side wall and the Z or back wall are accidentally dropped.

In the present invention, the first inner wall, the second inner wall, and the third inner wall are made into an integral member so that the storage box force can be removed, so that the number of parts constituting the light source device can be reduced. It is possible to improve the assembling property of the device and the maintenance property for the inside of the storage box.

[0046] In the present invention, a suction fan is provided facing the entrance of the housing portion, A suction guide that extends outward from the periphery of the entrance / exit is provided, so that a large amount of gas can be guided into the housing by the operation of the suction fan, improving the cooling performance of the light source device, and mounting of the light source device can also be guided by the suction guide .

In the present invention, the light source device that dissipates heat from the surroundings of the storage box is mounted on the housing of the lamp housing described above, so if the heat from the light source device is efficiently taken away and discharged to the outside! / Therefore, it is possible to realize a lamp unit that can form a heat transfer cycle and secure good cooling performance for a light source device that maintains an explosion-proof structure.

[0047] In the present invention, the lamp unit having the above-described configuration is provided, and an opening is provided at a location of the housing that faces the entrance and exit of the lamp housing. Gas can be sucked into the housing in the housing through the opening, the light source device can be continuously cooled, and the explosion-proof light source device can be kept at the optimum temperature even if the projection type image display device is used for a long time. .

Brief Description of Drawings

FIG. 1 (a) is a cross-sectional view of a rear projection apparatus according to an embodiment of the present invention, and (b) is a cross-sectional view taken along line AA in (a).

FIG. 2 is an exploded perspective view of the optical unit.

FIG. 3 is an exploded perspective view of the light source device.

4 is a cross-sectional view of the light source device taken along line BB in FIG.

FIG. 5 is a perspective view from the inner surface side of the front wall with a light source attached.

FIG. 6 is a perspective view of the inner surface side force of the front wall with the light source removed.

FIG. 7 is an enlarged perspective view showing the details of the outer groove.

FIG. 8 is a schematic view of a duct groove.

[FIG. 9] (a) is a cross-sectional view taken along line EE in FIG. 8, (b) is a cross-sectional view taken along line FF in FIG. 8, and (c) is a cross-sectional view taken along line GG in FIG. .

FIG. 10 is a cross-sectional view of a light source.

FIG. 11 is a perspective view showing a state in which the inner wall member is attached to the housing.

[FIG. 12] (a) to (c) are schematic views showing a procedure for attaching the back wall to the housing.

13 is a cross-sectional view of the main part of the other side wall taken along the line DD in FIG. 4. FIG. 14 is a sectional view of the lamp unit taken along line CC in FIG.

FIG. 15] A perspective view showing a front wall and a front part of a modified example.

[FIG. 16] (a) is a perspective view of a duct part of a modified example, and (b) is a schematic view of the duct part of another modified example.

Explanation of symbols

1 Rear projection device

10 Optical unit

20 Lamp unit

21 Light source

22 Reflector

22ε 22b Ventilation part

24 illuminant

29 Circulation fan

30 Light source device

31 Enclosure

34 Rear part

40 Front wall

42 Front

43 Duct section

44 External fin

45 Duct fin

50 Inner wall member

51 1st inner wall

52 2nd inner wall

53 3rd inner wall

60 Other side wall

62, 72 Outer fin

63, 73 Inner fin 70 back wall

80 Lamp housing

82a to 82d Suction guide section

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 (a) shows a rear projection device 1 (projection-type image display device) according to an embodiment of the present invention. The rear processing apparatus 1 of the present embodiment is characterized in that the number of parts related to the light source device housed therein is reduced and the cooling performance is improved.

[0051] The rear processing apparatus 1 has a configuration in which a lower casing 2 and an upper casing 3 are combined in appearance, and the lower casing 2 contains modulated light representing an image through a projection lens 12 therein. It houses an optical unit 10 that performs projection processing, a control unit 5 that performs overall control processing of the apparatus, and a power supply unit 4 that supplies power to each unit. In addition, the upper casing 3 has a reflection mirror la attached to the inner surface side of the rear wall portion 3a and a screen lb (corresponding to a projection object) attached to the front frame portion 3b. With the above configuration, in the rear projection apparatus 1, the modulated light representing the image projected from the projection lens 12 is reflected to the screen lb by the reflection mirror la, and an image is displayed on the screen lb.

FIG. 1 (b) shows a plan view of the optical unit 10 housed in the lower housing 2. In the optical unit 10, a lamp unit 20, an optical engine 13 including a spatial light modulator 14, and a substrate circuit unit 15 including a processing circuit for the optical engine 13 are mounted on a base plate 10 a. In the lamp unit 20, a light source device 30 including a light source 21 is mounted inside a lamp nosing 80. In addition, the lamp unit 20 sucks air (gas) for cooling the light source device 30 through the intake duct 6 from the intake opening 2b of the back plate portion 2a of the lower housing 2 and becomes hot due to cooling. The discharged air (heat) is discharged to the outside through the exhaust duct 7 through the exhaust opening 2d of the oblique back plate portion 2c. The air intake opening 2b of the lower housing 2 is provided so as to face the ramp 81 and the inlet / outlet port 81c (see Fig. 2) of the housing 80, which is accommodated inside the lower housing 2, so that the air outside the device can be smoothly flown. It is designed to flow toward 8 lc at the entrance.

[0053] The optical engine 13 houses therein light-transmitting members of various optical systems that allow light from the light source 21 to pass and be reflected. Then, based on the control processing of the substrate circuit unit 15, the spatial light modulator 14 generates modulated light representing an image. Furthermore, the optical engine 13 has a projection lens 12 attached at a predetermined angle at the light exit location, and projects the generated modulated light from the projection lens 12.

FIG. 2 shows a state in which the lamp housing 80 and the light source device 30 constituting the lamp unit 20 of the optical unit 10 are disassembled. The lamp nosing 80 has a box-shaped housing part 81 in which the light source device 30 is mounted from the opened entrance 81 c and a suction fan 85 that sucks air (gas) inside the nosing part 81. Note that the Z axis in the XYZ coordinates shown in FIG. 2 indicates the direction parallel to the optical axis of the light source device 30 (light source 21), the X axis is perpendicular to the Z axis, and the light source device 30 is mounted on the housing part 81. The Y axis indicates the direction perpendicular to the plane composed of the X and Z axes (XZ plane) (hereinafter the same)

[0055] The housing portion 81 basically has a structure covering the periphery other than the entrance / exit 81c, and allows light emitted from the light source device 30 to pass through the wall portion 8la on the side joined to the optical boot 13. The light transmission port 81b is formed. Further, the housing part 81 has a suction fan 85 attached to the outer surface of the peripheral wall part 8 le facing the entrance / exit 81c, and a suction port 8 If for the suction fan 85 is provided on the peripheral wall part 81e (see FIG. 14). ).

[0056] Furthermore, the housing part 81 has female connectors 83 and 84 attached to the upper and lower peripheral parts of the entrance / exit 81c. The upper female connector 83 is a connector for supplying power to the light source 21, and the lower female connector 84 is a connector for supplying power to the circulation fan 29 attached to the light source device 30. Although not shown, 83 and 84 are connected to a predetermined electric circuit included in the lower housing 2.

[0057] Furthermore, in the housing part 81, suction guide parts 82a, 82b, 82c, and 82d protrude outwardly on the four peripheral edges excluding the part where the female connectors 83 and 84 of the entrance / exit 81c are attached. The suction guide portions 82a to 82d have inner surfaces that are inclined so as to spread outward, and when the suction fan 85 of the housing portion 81 is activated, the air existing around the outer periphery of the inlet / outlet port 81c is moved to the housing portion. In addition to smoothly guiding the light source device 81 to the inside, it also serves as a guide when the light source device 30 is mounted on the lamp housing 80. As shown in FIG. 2, when the lamp housing 80 is fixed to the base plate 10a, the outer surface of the wall portion 81a of the housing portion 81 is The optical engine 13 is joined to the end surface of the flange portion 13 a formed at the end portion, and the center axis of the light passage port 81 b coincides with the optical center of the optical engine 13.

On the other hand, as shown in FIGS. 2 to 4, the light source device 30 has a structure in which the light source 21 is housed in a hexahedron-shaped housing 31 (corresponding to a storage box). Front wall 40 with a hole 41b for allowing light to pass through, one side wall 30a with a circulation fan 29 that circulates air (gas) in the casing 31 attached to the outer surface, a back wall 70 that faces the front wall 40, and one The other side wall 60 opposite to the side wall 30a is provided. The casing 31 has one side wall 30a divided into two parts. The side connected to the front wall 40 in the circumferential direction is the front part 42, and the side connected to the back wall 70 is the rear part 34. A circulation fan 29 is attached to the outer surface 34a of the fan.

[0059] In addition, the casing 31 accommodates an inner wall member 50 facing the other side wall 60, the back wall 70, and the rear portion 34 therein, and air is guided along the walls 60 and 70 by the guide of the inner wall member 50. Is circulated to dissipate heat from the walls 60 and 70 (see Fig. 4). Hereinafter, each part which comprises the light source device 30 is demonstrated sequentially.

[0060] As shown in FIG. 3, the front wall 40 of the casing 31 is a substantially L-shaped member integrated with the front portion 42 in a plan view. In this embodiment, in order to ensure good heat dissipation, The front wall 40 and the front portion 42 are integrally formed by casting (aluminum die casting) using aluminum (ADC12), which has a higher thermal conductivity than iron. Further, the front wall 40 has a plurality of external fins 44 integrally provided on the outer surface 41a of the plate-like wall plate portion 41, and the plurality of external fins 44 are in the X-axis direction (corresponding to the peripheral direction of the front wall 40). ). On the other hand, the front part 42 is integrally provided with a duct part 43 connected to the outlet 29a of the circulation fan 29, and a duct fin 45 extending in the Y-axis direction is integrated with the duct part 43 on the outer surface of the duct part 43. Is formed. Note that the front wall 40 and the front portion 42 can be detached from the casing 31 and are fixed to the casing 31 by screws.

[0061] The front wall 40 has the light source 21 attached to the inner surface 41c. The light source 21 of the present embodiment has an explosion-proof specification. As shown in FIGS. 3, 4, and 10, the light emitter 24 is mounted in the concave reflector 22, and a disk-like shape is formed in the opening 22c on the reflection side of the reflector 22. Explosion-proof glass 23 is installed. The reflector 22 has a reflection surface on the inner peripheral surface side having a required curvature, and vents 22a and 22b are formed at opposite positions on the outer peripheral portion, and the end of the light emitter 24 is formed on the top of the outer peripheral wall. A cylindrical part 22d to be attached is projected and installed.

[0062] A cylindrical member 22d of the reflector 22 has a block member 25 attached to an end thereof, and the block member 25 has a power supply line d that is conductively connected to the light emitter 24. The feeder line d has a connector C1 attached to the end, and extends outward through a notch 42f provided in the front part 42 (see FIG. 2). In addition, the light emitter 24 having one end attached to the cylindrical portion 22d specifically corresponds to a metal halide lamp, a high-pressure mercury lamp, or the like, and has a spherical diameter expanded in the center in the longitudinal direction (Z-axis direction). The chamber portion 26 is provided, and the front and rear portions of the chamber portion 26 are sealed portions 24a and 24b. The light source 21 having such a configuration is attached so that the peripheral edge on the opening side of the reflector 22 is in contact with the front wall 42.

FIG. 5 is a perspective view from the inner surface 41 c side of the front wall 40, and the light source 21 is fixed to the inner surface 41 c by fixtures 26 and 27 that hold the upper and lower peripheries of the reflector 22. By attaching the light source 21 in this way, the heat of the reflector 22 can be transferred from the inner surface 41c to the front wall 40, and the heat in the reflector 22 is also transferred to the front wall 40, so that the cooling performance of the light source 21 is improved. Contributes to improvement.

FIG. 6 is a perspective view from the inner surface 41c side of the front wall 40 with the light source 21 removed. The inner surface 41c is a wall portion 40b surrounding the reflector 22 of the light source 21 at four locations around the hole 41b. The internal fins 40a extending in the Y-axis direction are erected outward from the four wall portions 40b. Further, in the vicinity of each wall portion 40b, a contact plate portion 40f for positioning the fixtures 26 and 27 and a screw hole portion 40e for fixing the fixtures 26 and 27 with screws are formed.

Further, the upper and lower wall portions 40b on the right side in FIG. 6 are continuous with the air flow guide wall 40d extending in the vertical direction (Y-axis direction) on the right end side of the inner surface 41c, and are surrounded by the air flow guide wall 40d. This portion is used as an inflow portion 40c into which air that has passed through the vent 22b (see FIG. 5) on the discharge side provided in the reflector 22 of the light source 21 flows.

As shown in FIG. 4, the outer periphery of the reflector 22 of the light source 21 attached to the inner surface 41c of the front wall 40 becomes a closed space H closed by the inner wall member 50, and the front wall 40 A portion of the inner surface 41c where the internal fin 40a is formed appears in the closed space H. In addition, in the closed space H, natural convection in which the air rises upward due to the heat of the reflector 22 occurs, and the internal fin 40a extends in a direction along the natural convection (Y-axis direction), thus disturbing the natural convection. Without internal fin 40a Thus, the contact area with the enclosed space H is increased so that the heat in the enclosed space H can be transferred to the front wall 40.

Further, as shown in FIGS. 5 and 6, the front portion 42 has an upper rectangular hole 42c for attaching the connector C1 of the light source 21 to the upper side, and the end of the lead wire 29b extending from the circulation fan 29 on the lower side. It has a lower rectangular hole 42d for attaching the fan connector C2 provided in the section. Further, the front part 42 has an opening 43a of the duct part 43 formed on the inner side on the inner side, and the duct part 43 is a duct for guiding air to the ventilation part 22a on the suction side provided in the reflector 22 of the light source 21. A groove 46 is provided.

[0068] As shown in Figs. 7, 8, and 9 (a), (b), and (c), the duct groove 46 has a U-shaped cross section perpendicular to the groove longitudinal direction (X-axis direction) ( 9 (a) and 9 (b)), it has an upper top groove plate portion 47, a side groove wall portion 49 on the side, and a bottom groove plate portion 48 on the lower side, and is connected to the ventilation portion 22a of the reflector 22. A groove frame 46c is formed at the end on the other side. As shown in FIG. 8, the upper groove plate portion 47 is formed in parallel with the X-axis direction, while the lower bottom groove plate portion 48 is formed with a parallel portion 48a parallel to the X-axis direction. As it approaches the end where the groove frame portion 46c is provided (in the state where the light source 21 is attached, as it approaches the ventilation portion 22a of the reflector 22), it is provided with an inclined portion 48b which is inclined upward.

[0069] Since the bottom groove plate portion 48 thus includes the inclined portion 48b, the air passing through the duct groove 46 is inclined upward, and the gas that has entered the reflector 22 from the ventilation portion 22a is in the reflector 22 It goes upwards (direction shown by the arrow in FIG. 8). As a result, in the light source 21 shown in FIG. 10, a large amount of air flows into the top portion 26a of the chamber portion 26 of the light emitter 24 that becomes particularly hot in the reflector 22, and the top portion 26a is efficiently cooled. . On the other hand, since almost no air that has passed through the ventilation portion 22a flows downward in the reflector 22, the bottom portion 26b of the chamber portion 26 that is not as hot as the top portion 26a is not cooled much. For this reason, the temperature difference between the cooled top portion 26a and the bottom portion 26b that is difficult to cool is smaller than the conventional one, and the thermal load of the glass tube forming the light emitter 24 can be reduced.

[0070] Further, in the duct groove 46, a top-side built-up portion 46a is formed at a corner portion 49a in the groove where the top-groove plate portion 47 and the side groove wall portion 49 are continuous (FIGS. 7, 9 (a), etc.) reference). The top side 46a is the corner It is built up to fill 49a, and the width becomes wider as it approaches the end where the groove frame 46c is provided. Further, the duct groove 46 also forms a bottom-side built-up portion 46d at a corner portion 49b in the groove where the bottom groove plate portion 48 and the side groove wall portion 49 are continuous (see FIGS. 6, 9 (a), etc.). . Similarly to the top-side built-up portion 46a, the bottom-side built-up portion 46d becomes wider as it approaches the end where the groove frame portion 46c is provided. The top-side and bottom-side built-in portions 46a and 46d have delicate curved surfaces on their respective surfaces so that air passing through the corner portions 49a and 49b of the duct groove 46 flows smoothly. At the same time, the airflow is directed to the top portion 26a of the chamber portion 26 that is heated by the light emitter 24 in the reflector 22 and the tip portion 24c of the protruding seal portion 24a (see FIG. 10).

Furthermore, the duct groove 46 forms a lip portion 46b that is inclined so as to be separated from the side groove wall portion 49 as it approaches the end side of the side groove wall portion 49 provided with the groove frame portion 46c (see FIG. 7, see Figure 9 (c)). By this lip 46b, the air flowing along the side groove wall 49 as shown in FIG. 9 (c) advances in a direction toward the chamber part 26 of the luminous body 24 by the lip 46b and becomes high temperature. The chamber part 26 can be efficiently cooled. Note that the portions provided on the front wall 40 and the front portion 42 described above are all integrally formed, thereby reducing the number of parts constituting the light source device 30. In addition, the material of the front wall 40 and the front portion 42 has a higher thermal conductivity than iron and can be applied as long as it is a material. For example, it may be integrally formed by forging magnesium as a material.

[0072] The above-described casing 31 to which the front wall 40 and the front portion 42 are attached includes a top plate portion 32, a rear portion 34 that forms a part of one side wall 30a (see FIG. 2), and The bottom plate part 33 is connected and formed integrally, and when viewed from the Z-axis direction, it is U-shaped. The casing 31 is made of iron, which has a lower thermal conductivity than aluminum, and the heat generated by the light source 21 is less likely to be transmitted to the casing 31 so that a circulation fan attached to the rear section 34 is used. 29 is not affected by heat.

[0073] The top plate portion 32 and the bottom plate portion 33 are substantially symmetrical in the vertical direction, and the front wall screw hole portion 3 la is provided at the edge portion on the side where the front wall 40 is attached, and the other side wall 60 is attached. Side edge screw holes 31b are provided on the side edge portion, cutout grooves 35 and 36 are formed on the side edge portion on which the back wall 70 is attached, and the inner wall member 50 is positioned and fixed on the inner surface side. Convex part 38, 39 Is protruding.

[0074] In addition, the rear portion 34 on the side of the casing 31 is provided with a protruding piece 37 that protrudes forward in the vicinity of the outlet 29a of the circulation fan 29 attached to the outer surface 34. The projecting piece 37 has a root portion 37a and a tip portion 37b bent at the tip. The root portion 37a blocks the opening 43a of the guide portion 43 shown in FIGS. A path is formed (see FIG. 4), and the tip 37b blocks the duct groove 46 to form an air path in the duct groove 46 (see FIGS. 4 and 9 (a) to (c)). Further, as shown in FIG. 11, the rear portion 34 has an air inlet 34c for the circulation fan 29 formed on the inner surface 34b, and engaging portions 34d and 34e for engaging and fixing the inner wall member 50. is doing.

On the other hand, the inner wall member 50 shown in FIG. 3 has the first inner wall 51 and the back wall 70 that face the inner surface 61b of the wall portion 61 of the other side wall 60 with a gap in the assembled state of the casing 31. A second inner wall 52 facing the inner surface 71b of the portion 71 with a gap, a third inner wall 53 facing the inner surface 34b of the rear portion 34 with a gap, and a bent wall in which the end of the third inner wall 53 is bent The unit 54 is integrally formed (see Fig. 4).

[0076] The first inner wall 51 is provided with a closing plate 51c projecting near the center of the front end, and this closing plate 51c is formed on the inner surface 41c of the front wall 40 shown in Figs. The opening range on the reflector 22 side of the provided inflow portion 40c is closed to form a path for the air exiting from the ventilation portion 22b of the reflector 22. The first inner wall 51 is formed with bent plate portions 55 and 56 at the upper and lower ends, and the bent plate rods 55 and 56 are provided with holes 55a, 55b, 56a and 56b.

[0077] The second inner wall of the inner wall member 50 is provided with four protrusions 57 protruding outward. The height at which the protrusion 5 7 protrudes also with the second inner wall force is set so as to contact the tip 73a of the inner fan 73 of the back wall 70 in the assembled state of the casing 31 (FIGS. 12 (b) (c)). Further, the bent wall portion 54 of the inner wall member 50 forms a bent portion 58 at the end, and the bent portion 58 is connected to the engaging portions 34d and 34e provided on the rear portion 34 of the housing 31. The engagement pieces 58a and 58b to be inserted and engaged protrude (see FIGS. 3 and 11).

The other side wall 60 shown in FIG. 3 has a plurality of outer fins 62 protruding from the outer surface 61a of the wall portion 61 of the plate-like member, and a plurality of inner fins 63 protruding from the inner surface 61b. Both fins 62, 63 extend in the circumferential direction (Z-axis direction) at the location where the other side wall 60 of the casing 31 is attached, As shown in FIG. 13, the interval P2 between the inner fins 63 is narrower than the interval P1 between the outer fins 62 (P2 is about half the size of P1).

[0079] Among the plurality of inner fins 63, the one located near the center 63a in the height direction (Y-axis direction) has an end portion extending forward. In this way, the air that has passed through the reflector 22 and has exited from the discharge-side passage portion 22b has an end at the inflow portion 40c that spreads up and down in the Y-axis direction of the front wall 40 shown in FIGS. Due to the extended inner fin 63, the passage resistance at the center 63a in the height direction is increased, making it easier for air to flow in the vertical direction, and the air passing through the passage 22b is diffused up and down evenly. Let The other side wall 60 having the outer fin 62 and the inner fin 63 is integrally formed of aluminum in order to improve heat dissipation.

[0080] The back wall 70 is basically the same structure and material as the other side wall 60, and a plurality of outer fins 72 project from the outer surface 71a of the wall 71 and a plurality of inner fins 73 are provided on the inner surface 71b. It is protruding. The pitch dimension of the fins 72 and 73 is also narrower than the distance between the inner fins 73 as with the other side wall 60 compared to the distance between the outer fins 72. Further, the back wall 70 is adapted to be attached to the housing 31 by engagement, and two engaging projections 74 and 75 are provided on the upper side 71c and the lower side 71d of the wall 71, respectively. ing.

Next, a procedure for creating the light source device 30 by assembling the light source 21 and the front wall 40, the inner wall member 50, the other side wall 60, and the back wall 70 constituting the casing 31 will be described.

First, as shown in FIGS. 3 and 11, the inner wall member 50 is inserted into the housing 31 to be engaged and fixed. At this time, the engagement pieces 58a and 58b provided in the bent portion 58 of the inner wall member 50 are inserted into and engaged with the engagement portions 34d and 34e provided in the rear portion 34 of the housing 31, and the first The upper and lower convex portions 38 and 39 of the casing 31 are inserted into the holes 55a, 55b, 56a and 56b of the bent plate portions 55 and 56 of the inner wall 51, respectively, and the inner wall member 50 is fixed in the casing 31. As described above, since no screws are used to fix the inner wall member 50, the inner wall member 50 can be attached to the housing 31 with one touch.

[0082] After the inner wall member 50 is attached, the light source 21 is attached to the inner surface 41c of the front wall 40 as shown in FIG. Fix it in front of one side with screws (see Fig. 3).

[0083] Then, as shown in FIGS. 12 (a) to 12 (c), the engaging protrusion 74 (75) of the back wall 74 is cut off from the casing 31. After fitting into the notch 35 (36) and positioning it at the groove depth 35b of the notch 35, it is advanced in the direction of the arrow in FIG. 12 (b) to engage with the groove tip 35b (FIG. 12 (c )reference). In this state, the tip 73a of the inner fin 73 that also projects the back wall 74 force comes into contact with the protrusion 57 provided on the second inner wall 52 of the inner wall member 50, so that the back wall 74 easily falls off the housing 31. There is nothing.

[0084] Finally, the other side wall 60 is screwed and fixed to the housing 31, the end surface of the back wall 74 is held by the back side end of the other side wall 60 (see FIG. 4), and the connector C1 of the light source 21 is moved to the front part. The light source device 30 is completed by fitting the fan connector C2 of the circulation fan 29 into the lower rectangular hole 42d.

As shown in FIG. 4, in the completed light source device 30, a first space 30b is formed between the other side wall 60 and the first inner wall 51, and between the back wall 70 and the second inner wall 52. Thus, a second space 30c is formed, and a third space 30d is formed between the rear portion 34 and the third inner wall 53. Therefore, when the circulation fan 29 is activated, the air discharged from the circulation fan 29 enters the inside of the reflector 22 of the light source 21 through the duct groove 46 of the duct portion 43, and cools the luminous body 24 inside the reflector 22 to cause a high temperature. The air that has been discharged from the reflector 22 passes through the first space 30b, the second space 30c, and the third space 30d, is sucked by the circulation fan 29, and circulates in the housing 31.

[0086] At this time, when the heated air passes through the first space 30b and the second space 30c, it comes into contact with the plurality of inner fins 63, 73 over a wide area. It moves to the other side wall 63 and the back wall 70 through 73, and the light source 21 can be cooled many times with cool air. The air that has flowed into the reflector 22 flows to the top portion 26a of the chamber portion 26 of the light emitter 24 and the tip of the seal portion 24a side through the duct groove 46 described above. Cool down automatically.

[0087] Further, the heat of the light source 21 itself contacts and moves to the front wall 40, and the heat moved to the front wall 40 dissipates outward from the external fins 44 to improve the cooling efficiency of the light source 21. It is increasing. The heat transmitted to the data section 43 is also radiated to the outside through the duct fin 45.

On the other hand, the completed light source device 30 is mounted on the housing portion 81 of the lamp housing 80 as shown in FIG. 2, and the connector C 1 and the fan of the light source device are connected to the female connectors 83 and 84 provided on the housing portion 81. Connector C2 is joined to complete lamp unit 20. Note that when the light source device 30 is mounted, the suction provided at the peripheral edge of the inlet / outlet 81c of the housing part 81 Since the light source device 30 is guided to the entrance / exit 81c by the guide portions 82a, 82b, 82c, and 82d, the light source device 30 can be mounted smoothly.

[0089] Furthermore, the completed lamp unit 20 is assembled into the optical unit 10, and then the structure shown in FIG.

It is stored in the lower housing 2 shown in (b). When housed in the lower housing 2, the suction guide portions 82a, 82b, 82c, 82d of the lamp housing 80 are joined to the intake duct 6 provided in the lower housing 2, as shown in FIG. The exhaust duct 7 of the lower housing 2 is joined to the discharge part 81g of the wing 80, and the attachment of the lamp unit 20 to the rear projection device 1 is completed.

[0090] When the suction fan 85 attached to the lamp nozzle 80 operates, air outside the apparatus is taken in from the suction opening 2b of the lower housing 2 and flows into the housing part 81 through the intake duct 6. At this time, since air flows through the gap between the housing part 81 and the light source device 31, it comes in contact with the external fin 44 and the outer fins 62, 72 of the light source device 31 protruding in the gap over a wide area. . Further, since the heat inside the light source device 31 is transferred to the external fins 44 and the external fins 62 and 72, the external fins 44 and the external fins 62 and 72 are in contact with the flowing air over a wide area, and the external fins 44 The heat of the outer fins 62 and 72 is efficiently removed by the air.

[0091] Since the outer fins 62 and 72 have a wider fin interval than the inner fins 63 and 73 (see FIG. 13), the suction resistance is small, and the generation of sound due to suction can be minimized. . On the other hand, the inner fins 63 and 73 have a structure in which the light source device 30 is sealed even if the fin interval is narrowed. Therefore, even if sound is generated, it does not leak to the outside. ing.

[0092] Further, since the high-temperature air sucked by the suction fan 85 is discharged from the discharge portion 81g through the exhaust duct 7 to the outside through the exhaust opening 2d of the lower housing 2, the suction fan 85 operates. Further, the light source device 30 can be continuously cooled.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be applied. For example, a handle may be provided on one side wall 30a of the light source device 30 so that the light source device 30 can be easily removed from the lamp housing 80 when the light source device 30 is replaced. With the handle 49 ^ on the outer surface 42a 'of the front part 42' It is preferable to prevent the number of parts from increasing. Further, in order to further reduce the number of parts, the front wall 40 and the other side wall 60 may be integrally formed. On the other hand, if it is difficult to cast the duct part 43 and the duct fin 45 etc. of the front wall 40 integrally by casting, the duct part 43 and the duct fin 45 etc. should be made as separate parts. Is also possible.

[0094] Further, as shown in FIG. 16 (a), in order to improve the heat dissipation in the duct portion 43 ^, a duct fin 45 'is also provided in the duct portion 43' along the air flow direction. May be. Furthermore, as shown in FIG. 16 (b), in order to further increase contact with air and improve thermal conductivity, duct fin 90 having a cross-section formed in a honeycomb shape (corrugated shape) can be used. The shape of Yokoko's duct fin 90 can be applied to other fins 44, 62, 63, 72, 73, etc.

[0095] Furthermore, the other side wall 60 may be attached to the casing 31 in the same manner as the back wall 70 as shown in Figs. 12 (a) to 12 (b). The first inner wall 51 may be provided with a projection 57 similar to the second inner wall 52 so as to abut the tip of the inner fin 63 on the other side wall 60! In this case, the other side wall 60 and the back wall 70 may be attached to the housing 31 in the opposite manner as shown in FIG. 3, and the other side wall 60 may be attached by engagement and the back wall 70 may be screwed. The projection 57 on the second inner wall 52 can be omitted. Further, the configuration according to the present invention can be applied to a projection type image display apparatus of a front projection type in addition to the rear projection type rear projection apparatus 1 shown in FIGS. 1 (a) and 1 (b).

Claims

The scope of the claims

[1] A light source having a light emitter attached to a concave reflector and a hexahedral storage box for storing the light source, the storage box having a front wall formed with a hole through which light emitted from the light source passes, and a storage In the light source device having one side wall with a circulation fan for circulating the gas in the box attached to the outer surface, a back wall facing the front wall, and another side wall facing the one side wall, the one side wall is A front part connected to the front wall and a rear part connected to the back wall;

The circulation fan is attached to the outer surface of the rear part,

The front part and the front wall are an integral member and can be removed from the storage box;

The said front part is provided with the duct part connected to the discharge port of the said circulation fan, The said light source is attached to the inner surface of the said front wall, The light source device characterized by the above-mentioned.

[2] The duct part is formed integrally with the front part,

2. The light source device according to claim 1, further comprising a handle that protrudes from an outer surface force of the front portion and is formed integrally with the front portion.

[3] The light source device according to claim 1 or 2, wherein the front part and the front wall are made of a material having higher thermal conductivity than the rear part.

[4] The reflector is formed with a ventilation portion communicating with the inside of the reflector.

The duct portion includes a duct groove that guides gas to the ventilation portion,

The outer outer groove has a U-shaped cross section orthogonal to the groove longitudinal direction, and includes a top groove plate portion, a side groove wall portion, and a bottom groove plate portion,

The duct groove force The bottom groove plate portion is raised as it approaches the ventilation portion side so that the gas flowing into the reflector through the ventilation portion is directed upward in the reflector. The light source device according to any one of the above.

5. The light source device according to claim 4, wherein a bottom-side built-up portion is formed at a corner portion in a groove where the bottom groove plate portion and the side groove wall portion are continuous.

6. The light source device according to claim 4 or 5, wherein a top-side built-up portion is formed at a corner portion in a groove where the top-groove plate portion and the side groove wall portion are continuous.

7. The light source device according to any one of claims 1 to 6, wherein an external fin extending along a circumferential direction of the storage box is formed on an outer surface of the front wall.

[8] The light source device according to any one of [1] to [7], wherein an inner fin is formed on an inner surface of the front wall.

9. The light source device according to claim 8, wherein the inner fin extends orthogonally to the outer fin.

10. The light source device according to claim 1, wherein a duct fin is formed on a surface of the duct portion.

[11] The light source device according to any one of claims 1 to 10, wherein the other side wall and the back wall can be removed from the storage box.

12. The light source device according to any one of claims 1 to 11, wherein the other side wall and the back wall include an outer fin and an inner fin formed on an outer surface and an inner surface, respectively.

[13] A plurality of the outer fins and the inner fins are formed at intervals.

13. The light source device according to claim 12, wherein an interval between the inner fins is narrower than an interval between the outer fins.

[14] a first inner wall facing the inner surface of the other side wall at a distance,

A second inner wall facing the back wall at an interval,

A third inner wall facing the rear portion at an interval;

With

The circulation fan includes a first space formed between the other side wall and the first inner wall, a second space formed between the back wall and the second inner wall, and the rear portion and the third inner wall. 14. The light source device according to claim 1, wherein a gas that sequentially passes through a third space formed between the first and second spaces is sucked.

[15] a first inner wall facing the inner surface of the other side wall at an interval,

A second inner wall facing the back wall at an interval,

A third inner wall facing the rear portion at an interval;

With

The circulation fan has a first space formed between the other side wall and the first inner wall. The second space formed between the back wall and the second inner wall and the gas sequentially passing through the third space formed between the rear portion and the third inner wall are sucked, and the other The side wall and the back wall include an outer fin and an inner fin formed on the outer surface and the inner surface, respectively.

12. The light source device according to claim 1, wherein the second inner wall and the Z or third inner wall include a protrusion that protrudes so as to abut on a tip of the inner fin.

16. The light source device according to claim 14 or claim 15, wherein the first inner wall, the second inner wall, and the third inner wall are integral members and can be removed from the storage box.

[17] A lamp unit provided with a housing part to which the light source device is mounted, in which an inlet / outlet through which the light source device is inserted / extracted and a light passage port through which light generated by the light source device mounted therein is passed.ヽ For Uzing,

A suction fan attached to a location facing the entrance / exit of the housing portion so as to suck the gas inside the housing portion;

A suction guide portion extending outward from the periphery of the entrance and exit;

A lamp housing comprising:

[18] The light source device according to any one of claims 1 to 16,

Lamp knowing according to claim 17

With

The lamp unit, wherein the light source device is mounted on a housing portion of the lamp housing.

[19] The lamp unit according to claim 18,

A spatial light modulation element that generates modulated light according to an image by light emitted from the light source power of the lamp unit;

A projection lens that projects the modulated light generated by the spatial light modulation element onto the projection target; a housing that houses the lamp unit, the spatial light modulation element, and the projection lens;

With

The projection-type image display device, wherein the housing has an opening formed at a location facing an entrance / exit of the lamp housing.