JP3856812B2 - Light source device and projection-type image display device - Google Patents

Description

  The present invention relates to a light source device in which heat dissipation of a luminous tube serving as a light source is improved by providing a heat conducting member, and a projection type image display device to which such a light source device is applied.

  2. Description of the Related Art Conventionally, there is a projector (projection type image display device) that projects modulated light on an image generated by a light source on a screen and displays an image on the screen as a front projection method. Further, such a configuration of the projection type image display apparatus is also applied to a rear projection system represented by a rear projection television. Projection-type image display devices are required to have a high-luminance light source, and a light source device using a lamp (discharge-type arc tube) such as a metal halide lamp and a high-pressure mercury lamp is built in.

  The light source device includes a reflector having a shape that covers the arc tube from one side in order to reflect light emitted from the lamp of the light source in a desired direction. The reflector functions as a concave mirror by making the inner peripheral surface a mirror surface, and reflects light emitted from the arc tube outward from the opening side of the reflector.

  Lamps such as metal halide lamps and high-pressure mercury lamps generate a large amount of heat and reach a high temperature in use. If the lamp itself reaches a high temperature, the temperature of the lamp body and the inner peripheral surface (concave mirror) of the reflector will be excessively increased, leading to various problems such as shortening the life of the lamp itself and degrading the reflective layer of the concave mirror. Give rise to Therefore, in the projection type image display apparatus, it has been essential to provide a cooling mechanism in which a cooling fan is disposed around the light source device and the entire light source device is forcibly cooled by blowing air.

  In addition, harmful mercury and halogen gas are enclosed in the glass rod-shaped support (glass support) that constitutes the lamp of the light source (high-pressure mercury lamp). Therefore, if the glass support is ruptured for some reason, a loud plosive sound is generated and harmful substances and glass may be scattered. For this reason, in a light source device using a lamp with an input power of about 150 W (watts) or less, the opening side of the reflector is closed with a glass plate or an optical lens, etc., so as to prevent a plosive sound and leakage of harmful substances. Some are explosion proof. However, if the explosion-proof specification is used, the inner peripheral surfaces of the lamp and the reflector cannot be cooled directly from the outside. Therefore, the light source device whose input power exceeds about 150 W generally does not adopt the explosion-proof specification.

Further, in Patent Document 1, in a light source device in which a glass plate or an optical lens is provided on the opening side of a reflector, an opening is provided in a part of the reflector in order to enable ventilation to the inner peripheral surface of the lamp and the reflector. There has been proposed one in which cooling air is sent into the reflector through the opening.
Patent Document 2 describes a xenon lamp of a type different from the lamp of the light source device described above, in which a support member for supporting one of the opposing electrodes is connected to a reflector.

Further, Patent Document 3 discloses a light source device provided with a heat conduction contact member protruding from the hole edge of the arc tube mounting hole of the reflector in order to lower the temperature of the luminous bulb portion (chamber portion) of the arc tube. Has been.
JP 11-39934 A US Patent No. 6400067 JP-A-2005-71814

  In the apparatus according to Patent Document 1, since an opening is provided in a part of the reflector, there is a problem that explosion sound and harmful substances cannot be reliably prevented from leaking outside through the opening when the lamp of the light source is ruptured. is there. Further, the explosion-proof light source device has a problem that the lamp inside the reflector and the inside of the reflector cannot be cooled sufficiently.

  On the other hand, a lamp as a light source has a structure in which electrodes are arranged opposite to each other in an internal cavity of a chamber portion formed in a central portion of a glass support whose both ends are sealed. This chamber portion has a heat resistance of about 1000 ° C. However, the sealing portions at both ends have only heat resistance up to about 400 ° C. One end of the lamp having such a structure is attached to the reflector, and heat generated in the glass support when the lamp is turned on does not generate heat in the range of the end on the attachment side from the chamber to the reflector. Since it moves to the reflector by heat conduction, it can be relaxed to some extent.

However, the range of the sealing portion from the chamber part to the end portion opposite to the mounting side, since the protruding in a state of floating in the air within the reflector, heat accumulation can not move generated heat efficiently There is a problem that the temperature rises compared to the end on the mounting side. Note that such a temperature rise tendency in the arc tube occurs in both the explosion-proof light source device and the non-explosion-proof light source device. In addition, recent projection-type image display devices have appeared in a small type that emphasizes portability compared to the stationary type, and in such a small projection-type image display device, the degree of mounting inside the device casing has been increased. Therefore, it becomes more difficult to ensure good cooling performance for the light source device.

In addition, the structure which concerns on the patent document 2 is related only to the xenon lamp which supports one electrode, is provided with the sealing part in both ends, and the lamp (light-emitting tube) which comprises an electrode in the chamber part of a center part is a reflector. It is structurally different from the light source device to be attached to. Therefore, the configuration according to Patent Document 2 that supports one electrode from the surroundings cannot be applied structurally to the light source device that attaches the lamp to the reflector, and cannot be directly applied to the configuration that releases the heat of the lamp to the reflector. .

  Further, in the light source device according to Patent Document 3, the heat conduction contact member protruding from the edge of the arc tube attachment hole of the reflector is in contact with the attachment side portion from the chamber portion to the reflector in the lamp. The heat generated in the range protruding from the chamber portion cannot be directly transferred to the reflector.

  The present invention has been made in view of such a problem, and efficiently suppresses heat generation due to lighting of the arc tube regardless of the explosion-proof specification and the explosion-proof specification, in particular, with respect to the side protruding from the chamber portion of the arc tube. An object of the present invention is to provide a light source device and a projection-type image display device that are capable of radiating heat.

In order to solve the above-mentioned problems, the light source device according to the present invention has one end of the arc tube attached to the reflector so that the arc tube protrudes from the center of the reflector having a concave inner peripheral surface as a reflection surface to the reflection side. In the light source device in which a pair of electrodes are disposed opposite to each other in a chamber portion formed between the sealing portions on both ends, the arc tube has a sealing portion on a side protruding from the chamber portion of the arc tube. A heat conducting member connecting the reflector, the heat conducting member having an extending portion extending radially from the arc tube side to the reflector side, and having a cross-sectional shape orthogonal to the extending direction of the extending portion Has a wedge shape, and the mounting direction of the arc tube is a wedge-shaped tapered side .

  In the present invention, since the arc tube and the reflector are connected by the heat conducting member, the heat generated in the arc tube by lighting can be directly conducted to the reflector through the heat conducting member. As a result, the temperature rise of the arc tube is suppressed, and the light source device as a whole can secure good temperature characteristics even when lit, and the service life of the arc tube and the reflector can be extended. In addition, as a material used for a heat conductive member, it is preferable to apply ceramics etc. which consist of metals, such as copper and aluminum with favorable heat conductivity, and aluminum nitride.

In addition, since the sealing portion on the protruding side from the chamber portion of the arc tube and the reflector are connected by the heat conducting member, a heat path for releasing heat from the sealing portion on the protruding side to the reflector through the heat conducting member is formed. Longer life of arc tube because the sealed part on the protruding end side, where the temperature tends to rise due to the lighting of the arc tube, can be reliably cooled, and the end part temperature on the sealed part side can be maintained at 350 ° C or lower in normal conditions. Can be achieved.
Furthermore, in the present invention, since both are connected by the extending portion that extends radially from the arc tube side to the reflector side, the light emitted from the arc tube and reflected by the reflector is emitted outward. Since only the extension part is obstructed, and the extension part has a radial arrangement, it is possible to minimize the extent to which the light radiated outwards is blocked, and hinder the function of the light source device as the light source. Also disappear. In addition, by extending the extending portion radially, the arc tube and the reflector can be connected at the shortest distance, the deterioration of the thermal conductivity due to the length of the heat conducting member is suppressed, and the arc tube is It can be cooled efficiently. It should be noted that if the number of extension portions is one or more, the configuration is established, but considering the balance between structural stability and the degree of light blocking, it is optimal to provide three extension portions, Of course, it is possible to provide three or more extending portions. Further, in the present invention, since the cross-sectional shape of the extending portion is a wedge shape with the side corresponding to the mounting direction of the arc tube tapered, the degree of blocking the reflected light of the reflector can be further suppressed. That is, each light beam forming the light (light flux) reflected by the reflector travels while spreading to some extent because the reflecting surface of the reflector has a predetermined curvature. Therefore, by making the cross-section of the extension part into a tapered wedge shape on the arc tube mounting direction side, the light blocking location is only the wedge-shaped tip portion, and if the light beam travels along the wedge-shaped hypotenuse, the wedge-shaped tip portion The light beam that has passed through is not blocked by the extending portion, and the decrease in the amount of light can be minimized.

The light source device according to the present invention is characterized in that a base material of the reflector is a metal material.
In the present invention, the base material of the reflector is made of a metal material, so that the heat conducted by the heat conducting member is easily transmitted to the reflector, and the transmitted heat is radiated to the outside. Ability also improves. In addition, as a metal material applied to the base material of the reflector, aluminum, copper, or the like having a thermal conductivity of 10 W / m · K or more is preferable.

The light source device according to the present invention is characterized in that a curved portion is formed in the extending portion.
In the present invention, since the curved portion is formed in the extending portion, it is possible to eliminate a problem caused by an increase in the temperature of the heat conducting member itself.

  That is, when the heat conducting member is formed of a metal material, the heat conducting member is heated by being irradiated with heat conducted from the arc tube and light reflected by the reflector. When the heat conducting member is heated, the members constituting the heat conducting member are thermally expanded, stress is applied to the arc tube arranged at the center of the reflector, and the arc tube is misaligned. In the worst case, the glass of the arc tube It is assumed that the support is broken.

  However, in the present invention, by absorbing the thermal expansion by the curved portion and releasing it, the arc tube is not stressed, and the above-described problems can be prevented. The bending direction of the curved portion can be appropriately set according to the dimensions, specifications, etc. of the light source device. For example, in the case of a curved portion bent in a direction perpendicular to the radial direction of the extending portion, the thermal expansion component is tangentially increased. I can escape.

In the light source device according to the present invention, the pair of electrodes arranged opposite to each other in the arc tube has a slope formed from the apex side to the opposite side so that the tips facing each other are apexes, The light beam emitted between the inclined surfaces of the two electrodes is formed outside the region where it is reflected by the reflector .

In the present invention, the light beam emitted between the inclined surfaces of both electrodes is reflected by the reflector to the outside by forming a curved portion outside the region where the light beam is reflected by the reflector, that is, in a region where the light beam density is low. The influence of blocking the emitted light at the curved portion can be minimized, and the deterioration of the light source characteristics of the light source device can be prevented. In addition, the area | region of the reflector side corresponds as an area | region with a low light beam density, and when the length of an arc_tube | light_emitting_tube is short compared with the dimension of a reflector, the periphery of an arc_tube | light_emitting_tube corresponds also.

The light source device according to the present invention is characterized in that the heat conducting member includes an outer fitting annular portion that externally fits the arc tube, and the extension portion extends from the outer fitting annular portion.
In the present invention, since the outer fitting annular portion for fitting the arc tube is provided, a large contact area between the heat conducting member and the arc tube can be secured by the outer fitting annular portion, and the heat generated in the arc tube can be secured. The arc tube can be cooled by increasing the efficiency absorbed by the heat conducting member.

  Note that the length of the outer ring portion can be set to a dimension that can cover the entire range of the sealing part, or can be set to a dimension that covers a part of the range of the sealing part. The shape of the fitting annular portion can be a pipe shape or a ring shape depending on the length. Furthermore, the externally fitted annular portion does not necessarily have to be continuous in the circumferential direction, and a partial cut portion may be provided so as to absorb the expansion due to thermal expansion. In addition, by extending the extension part from the outer ring part, heat conducted from the arc tube to the outer ring part can be smoothly conducted to the extension part, thereby achieving efficient heat transfer. it can.

In the light source device according to the present invention, the heat conducting member includes a fitting annular portion fitted to the peripheral surface of the reflector, and an extending end of the extending portion is connected to the fitting annular portion. It is characterized by that.
In the present invention, since the fitting annular part fitted to the peripheral surface of the reflector is provided and the extension part is connected to the fitting annular part, the heat conducting member and the reflector are connected by the fitting annular part. A large contact area can be secured, and the heat of the heat conducting member can be smoothly conducted to the reflector. The fitting annular portion is not necessarily continuous in the circumferential direction like the outer fitting annular portion, and a dividing portion may be provided to absorb the thermal expansion.

The light source device according to the present invention is characterized in that a bent portion is provided at an extending end of the extending portion, and the bent portion is in contact with an inner peripheral surface of the reflector.
In the present invention, since the bent portion that contacts the inner peripheral surface of the reflector is provided at the extending end of the extending portion, the heat conducting member can be easily attached to the reflector side. That is, simply by attaching the heat conducting member from the reflection side opening of the reflector, the bent portion can be brought into contact with the inner peripheral surface of the reflector to fix the heat conducting member. Further, since the bent portion is in contact with the inner peripheral surface of the reflector, heat can be conducted from the extending portion to the reflector through the bent portion. In addition, when fixing to a reflector in a bending part, you may use an adhesive agent (adhesive agent) with favorable heat conductivity, or you may fix by screwing, brazing, etc. .

In the light source device according to the present invention, a bent portion parallel to an end surface of the reflection side opening of the reflector is provided at an extension end of the extension portion, and the bending portion is a reflection side opening of the reflector. It is characterized by being in contact with the end face.
In the present invention, since the bent portion that contacts the end face of the reflection side opening of the reflector is provided at the extending end of the extending portion, the heat conducting member is attached to the reflector when the heat conducting member is attached to the reflector. A portion that reliably contacts is secured by the bent portion. Therefore, heat can be reliably conducted from the heat conducting member to the reflector through the bent portion. In order to fix the bent part to the reflector, it is preferable to use an adhesive (adhesive) having good thermal conductivity, or to apply screwing, brazing, or the like. Since the work is performed on the end face facing outward of the reflector, workability is also good.

In the light source device according to the present invention, a slit is formed at a location of the reflector corresponding to the extending direction of the extending portion of the heat conducting member, and the extending end of the extending portion is fitted into the slit. It is characterized by being combined.
In the present invention, since the extending end of the extending portion is fitted into the slit formed in the reflector, the heat conducting member can be attached to the reflector side simply by fitting the extending end into the slit. Moreover, since the extended end fitted to the slit contacts the peripheral edge of the slit, heat can be conducted from the heat conducting member to the reflector through the contact portion. Furthermore, even if the extension portion is thermally expanded due to heat conduction and irradiation of the reflected light from the reflector, the extension end is not prevented from thermally expanding in the direction of extending through the slit. It will expand | swell to the exit end side, and it can avoid applying unnecessary stress to an arc tube.

The light source device according to the present invention is characterized in that a bent portion is provided at an extended end of the extended portion, and the bent portion is in contact with an outer peripheral surface of the reflector.
In the present invention, since the bent portion that contacts the outer peripheral surface of the reflector is provided at the extended end of the extending portion, the heat conducting member is the outer peripheral surface of the reflector at the bent portion of the extended end that passes through the slit. Can be externally fitted, and the attachment to the reflector can be ensured, and the contact area with the reflector can be expanded to increase the efficiency of heat conduction to the reflector. In addition, in order to strengthen the attachment to the reflector at the bent portion, it is possible to apply an adhesive (fixing agent) having good thermal conductivity, screwing, brazing, etc., and these operations can be performed from the outer peripheral surface side of the reflector. Therefore, workability is also good.

In the light source device according to the present invention, the shape of the wedge-shaped cross section orthogonal to the extending direction of the extending portion is such that the dimension in the first direction parallel to the longitudinal direction of the arc tube is orthogonal to the first direction. It is characterized by being larger than the dimension in the second direction.
In the present invention, the wedge-shaped cross section of the extending portion is larger in the dimension in the first direction parallel to the longitudinal direction of the arc tube than the dimension in the second direction orthogonal to the first direction. Therefore, when securing the cross-sectional area necessary for heat conduction, it can be dealt with by increasing the dimension in the first direction, and the degree of blocking the reflected light of the reflector can be minimized while ensuring good heat conductivity. .

The light source device according to the present invention is characterized in that the surface of the heat conducting member is coated with an antioxidant film.
In the present invention, by coating the surface of the heat conducting member in preventing oxide film can be suppressed heat conductive member generates heat by irradiation with light reflected by the reflector. That is, since the heat conducting member is irradiated with the reflected light of the reflector, it is heated by the reflected light during lighting, but the surface is not fogged by covering the surface with the anti-oxidation film, and the irradiated light is reflected on the surface. Therefore, it is possible to prevent the heat conduction member from being heated by irradiation from the reflector by appropriately reflecting and suppressing the heat conduction efficiency from being lowered. In addition, it is preferable that the surface of the heat conducting member has high reflection characteristics, and the surface of the heat conducting member is previously glossed by a treatment such as polishing or plating, and such a glossy surface is formed with an antioxidant film. It is preferable to coat. Note that it is preferable to use an antioxidant film containing silicon dioxide as a component, quartz coating, or the like.

In the light source device according to the present invention, the inner peripheral surface of the reflector is coated with an infrared heat conversion layer that converts infrared rays into heat, and the opposite side of the infrared heat conversion layer from the inner peripheral surface of the reflector reflects visible light. It is covered with a visible light reflecting layer .
In the present invention, Runode inner circumferential surface of the reflector is covered with the infrared heat conversion layer of thermally converting the infrared, the temperature of the reflective surface prevents the excessive increase, it is possible to prevent deterioration of the reflecting surface The heat dissipation of the reflector itself can be maintained well.

The light source device according to the present invention is characterized in that a base material of the reflector is exposed at a location where the heat conducting member of the reflecting surface is connected.
In the present invention, the portion where the heat conducting member is connected on the reflecting surface of the reflector exposes the reflector base material, so that the heat diffusion film is in the path for conducting heat from the heat conducting member to the reflector. No longer exists. As a result, the heat diffusion film does not become a resistance for heat conduction, and heat can be efficiently conducted.

The light source device according to the present invention is characterized in that the reflector includes a radiating fin on an outer peripheral surface.
In the present invention, since the reflector is provided with heat radiation fins on the outer peripheral surface, the heat dissipation of the reflector can be further improved, and the heat conduction from the heat conducting member to the reflector can be smoothly performed while suppressing the temperature rise of the reflector. .

The light source device according to the present invention includes a projecting heat conducting portion projecting from the inner peripheral surface of the reflector, and the projecting heat conducting portion includes a sealing portion on the attachment side from the chamber portion of the arc tube to the reflector and the It is characterized by being connected to a reflector.
In the present invention, the projecting heat conducting part is provided in the reflector so as to connect the sealing part on the attachment side to the reflector from the chamber part of the arc tube and the reflector. Heat generated in the range of the attachment side to the reflector including the chamber portion of the tube can be efficiently transferred to the reflector. As a result, heat is conducted to the reflector at the one end side which is the mounting side of the arc tube to the reflector, and the heat conduction described above is conducted at the other end side which is the projecting side of the arc tube. The member conducts heat to the reflector, and it is possible to transfer the entire heat generated in the arc tube to the reflector, thereby preventing the arc tube from becoming excessively hot.

The light source device according to the present invention includes an attachment-side heat conduction member that connects the sealing portion on the attachment side to the reflector from the chamber portion of the arc tube and the reflector.
In the present invention, since the mounting side heat conduction member that connects the sealing portion on the mounting side to the reflector from the chamber portion of the arc tube and the reflector is provided, the mounting to the reflector including the chamber portion of the arc tube The heat generated in the side range can be moved to the reflector by the mounting side heat conducting member. Therefore, it is possible to move the overall heat generated in the arc tube to the reflector through both the heat conducting member and the attachment side heat conducting member, and the cooling performance for the arc tube can be further improved. Moreover, since the attachment-side heat conducting member is a separate member from the reflector, it is not difficult to manufacture the reflector.

In the light source device according to the present invention, the attachment-side heat conducting member extends outward from the reflector through a portion where the arc tube is attached to the reflector, and includes a fin at the extended portion. And
In the present invention, since the fin is provided at the location where the reflector on the attachment side heat conduction member extends outward, a part of the heat moved from the arc tube to the attachment side heat conduction member is moved to the reflector. Instead, heat can be directly radiated through the fins from the part extending outward of the attachment side heat conducting member. As a result, it is possible to reduce the heat radiation load of the reflector, and to efficiently dissipate heat with the attachment side heat conducting member, thereby improving the cooling performance for the arc tube.

The light source device according to the present invention includes a translucent member attached so as to close a reflection side opening of the reflector.
In the present invention, since the translucent member that closes the reflection side opening of the reflector is provided, the light source device can be made explosion-proof, and after preventing the plosive sound and the leakage of harmful substances, the heat conducting member can Temperature rise can be prevented, and stable use can be ensured even after lighting for a long time. In addition, the explosion-proof light source device of the present invention cools the arc tube with a heat conducting member, so that stable lighting can be maintained even if the input power to the arc tube is increased compared to the conventional explosion-proof light source device, Specifically, electric power from 180 W exceeding 150 W to about 200 W (up to 200 W or more depending on the specification) can be input, and higher brightness can be provided.

A projection-type image display device according to the present invention includes the light source device, a spatial light modulation element that generates modulated light according to an image using light emitted from the light source device, and modulated light generated by the spatial light modulation element. And a projection lens that projects onto the projection body.
In the present invention, since the projection type image display device includes a light source device that has improved cooling efficiency as compared with the prior art, it is possible to eliminate problems caused by heat generation, simplify the forced cooling mechanism of the light source device, and The forced cooling mechanism itself can be omitted. As a result, it is easy to achieve a reduction in size and weight of the apparatus, which can contribute to a reduction in apparatus cost.

In the present invention, by connecting the arc tube and the reflector with the heat conducting member, the heat generated in the arc tube can be conducted to the reflector through the heat conducting member, and the temperature rise of the arc tube is suppressed to realize stable lighting. At the same time, the life of the arc tube can be extended, and the sealing portion on the protruding end side of the arc tube and the reflector are connected by a heat conducting member, so the sealing portion on the protruding end side where the temperature of the arc tube tends to rise is usually In this state, it can be maintained at 350 ° C. or lower.
In the present invention, since the heat conducting member is provided with an extending portion that extends radially from the arc tube side to the reflector side, the degree of blocking the reflected light of the reflector can be minimized and the cooling performance can be reduced. The predetermined light source characteristics of the light source device can be maintained while improving. Furthermore, in the present invention, since the cross-sectional shape of the extending portion is a wedge shape in which the side corresponding to the mounting direction of the arc tube is tapered, the degree of blocking the reflected light of the reflector can be further suppressed.

In the present invention, the base material of the reflector is made of a metal material, so that the heat conducted by the heat conducting member can be smoothly transferred to the reflector, and the heat dissipation capability of the entire light source device can be improved .

In the present invention, since the curved portion is formed in the extending portion, it is possible to eliminate a problem caused by the thermal expansion by letting the curved portion escape the thermal expansion.
In the present invention, the light reflected between the inclined surfaces of both electrodes is formed in a curved portion outside the region where the light beam is reflected by the reflector, that is, in a region where the light beam density is low. It is possible to minimize the influence of blocking and prevent the light source characteristics of the light source device from deteriorating.

In the present invention, since the heat conducting member has an outer ring portion that fits the arc tube, the efficiency of conducting heat generated in the arc tube to the heat conducting member while ensuring a large contact area with the arc tube. Can be improved.
In the present invention, since the heat conducting member has a fitting annular portion fitted to the peripheral surface of the reflector, a large contact area with the reflector is ensured and the heat of the heat conducting member is smoothly conducted to the reflector. Can be made.

In the present invention, since the bent portion that contacts the inner peripheral surface of the reflector is provided at the extended end of the extending portion, the heat conducting member can be easily attached to the reflector, and the heat transfer location to the reflector at the bent portion. To ensure efficient heat conduction.
In the present invention, since the bent portion that contacts the end surface of the reflection-side opening of the reflector is provided at the extended end of the extending portion, a heat transfer location to the reflector can be ensured through the bent portion, and When the conductive member is joined and fixed to the reflector, the work for joining can be easily performed at the bent portion of the end face portion of the reflector.

In the present invention, the heat conducting member can be easily attached to the reflector side simply by fitting the extension end into the slit, and the extension end fitted into the slit comes into contact with the peripheral edge of the slit to the reflector. Conducts heat smoothly.
In the present invention, since the bent portion that contacts the outer peripheral surface of the reflector is provided at the extended end of the extending portion, the bent portion externally fits the outer peripheral surface of the reflector so that the heat conducting member is firmly attached to the reflector. In addition to being attached, heat conduction can be performed to the reflector through the bent portion, so that the heat conduction efficiency can be improved.

In the present invention, the wedge-shaped cross section of the extending portion is larger in the dimension in the first direction parallel to the longitudinal direction of the arc tube than the dimension in the second direction orthogonal to the first direction. Therefore, it is possible to minimize the degree of blocking the reflected light of the reflector while ensuring good thermal conductivity .

  In the present invention, the surface of the heat conducting member is coated with an anti-oxidation film, so that the heat conducting member can be prevented from being heated by the reflected light of the reflector. Can maintain good thermal conductivity.

In the present invention, Runode inner circumferential surface of the reflector is covered with the infrared heat conversion layer of thermally converting the infrared, while preventing deterioration of the reflecting surface, the thermal conductivity is also efficient from the heat conduction member to the reflector Can be done.
In the present invention, the portion where the heat conducting member is connected exposes the base material of the reflector, so heat conduction can be performed directly from the heat conducting member to the reflector, and a heat diffusion film is provided. Can also conduct heat well.
In the present invention, since the reflector includes the heat radiation fins on the outer peripheral surface, the heat radiation property of the reflector itself can be improved, and the heat conduction from the heat conducting member to the reflector can be performed well.

  In the present invention, since the projecting heat conducting portion is provided on the reflector, the heat generated in the range of the attachment side to the reflector including the chamber portion of the arc tube is also smoothly transferred to the reflector through the projecting heat conducting portion. Thus, the temperature rise of the arc tube can be prevented.

In the present invention, since the mounting side heat conducting member is provided, the heat generated in the range of the mounting side to the reflector including the chamber portion of the arc tube is moved to the reflector by the mounting side heat conducting member, and the arc tube It is possible to suppress the temperature rise prevention.
In the present invention, since the attachment-side heat conductive member is provided with the fins, the heat transferred from the arc tube to the attachment-side heat conduction member can be directly radiated through the fins, and the heat dissipation can be further improved.

In the present invention, since including a transparent member for closing the reflection side opening of the reflector, can achieve a leakage prevention pop and harmful substance according translucent member Rutotomoni, the temperature of the arc tube by heat conduction member It is possible to achieve an effect that could not be achieved by the conventional light source device, which could prevent the rise.

  In the present invention, since the projection type image display device includes a light source device that has improved cooling efficiency as compared with the prior art, it is possible to eliminate problems caused by heat generation, simplify the forced cooling mechanism of the light source device, and The forced cooling mechanism itself can be omitted, and the reduction in size and weight can be promoted.

  FIG. 1 is a block diagram showing an internal configuration of a projection type image display apparatus (projector) 1 according to the first embodiment of the present invention. In the projection type image display apparatus 1 of the present embodiment, the light source device 10 that has improved cooling performance and heat dissipation performance compared to the prior art is provided inside the housing 1a, and a forced cooling mechanism using a cooling fan is omitted. It is a feature.

  The projection-type image display device 1 has a color wheel 2 as an optical system portion facing the light source device 10, and in order toward the downstream side of the color wheel 2 in the traveling direction of light rays emitted from the light source device 10. A rod lens 3, a condenser lens 4, a TIR prism 5, a reflection mirror 6, a DMD (Digital Micromirror Device: registered trademark, the same applies hereinafter) 7, and a projection lens 8 are provided. In addition, a circuit board 9 that controls each part of the optical system described above is disposed at other locations inside the housing 1a.

  Light rays emitted from the light source device 10 include ultraviolet rays, visible rays, and infrared rays, and are white rays for visual recognition. The color wheel 2 disposed near the focal point of the emitted light beam is divided into three segments that transmit at least red, green, and blue light rays.

The rod lens 3 on the downstream side of the color wheel 2 is mainly formed of a glass base material in a columnar shape, and a bundle of light rays (light flux) incident at a desired divergence angle from one end face (incident surface) is converted into a glass base material. The total reflection is repeated and efficiently propagated at the interface (side surface) on the inner surface side, and the illuminance of the light beam emitted from the other end surface (outgoing surface) is made uniform. The light flux whose illuminance is made uniform by the rod lens 3 passes through the condenser lens 4 and the TIR prism 5, is sequentially reflected by the reflection mirror 6 and the TIR prism 5, and enters the DMD 7.

  The DMD 7 corresponds to a spatial light modulation element, and is formed by an element that generates an image by controlling a mirror array that can move in the micron order. The modulated light of the image generated by the DMD 7 along with the incident light beam is a projection lens. 8 is projected onto a screen (projection target) (not shown). Note that the projection-type image display device 1 can use a liquid crystal panel instead of the DMD 7 as a spatial light modulation element.

  The control related to the projection of the projection-type image display device 1 will be described. The control circuit unit provided on the circuit board 9 controls the phase rotation of the color wheel 2 by the synchronization signal of the DMD 7 and, for example, the red image data is input to the DMD 7. The rotation of the color wheel 2 is controlled so that the light beam emitted from the light source device 10 passes through the red segment of the color wheel 2 during the set time period.

  Therefore, the light beam of the light source device 10 passes through the color wheel 2 to become red (R), green (G), and blue (B) rays in order, and the DMD 7 is also sequentially used for R, G, and B in synchronization therewith. Since the R, G, and B light beams are incident on and emitted from the DMD 7, light beams of the R, G, and B images are sequentially generated. By projecting the light rays (modulated light) of these R, G, and B images onto the screen (not shown) from the projection lens 8, the R, G, and B images are displayed on the screen. Note that the R, G, and B images displayed on the screen are each switched at a speed equal to or higher than human color resolution of 180 Hz or higher, so that they are visually recognized as color images.

  FIG. 2 shows an exploded state of the light source device 10 applied to the projection type image display device 1 described above. The light source device 10 of this embodiment is explosion-proof specification and has a disk-shaped explosion-proof glass 29 (corresponding to a translucent member) that closes the opening 11d of the reflector 11 in which the arc tube 12 is arranged. An optical lens can be applied in place of the explosion-proof glass 29. The optical device 10 also has an impeller-like heat conducting member 20 that connects the arc tube 12 and the reflector 11, and conducts heat generated in the arc tube 12 by lighting to the reflector 11 by the heat conducting member 20. . Hereinafter, the configuration of each part of the light source device 10 will be described in detail.

  As shown in FIG. 3, the reflector 11 is provided with a flange portion 11 b on the peripheral edge on the opening 11 d side which is the reflection side of the concave mirror portion 11 a having an inner peripheral surface 11 f formed as an elliptical surface or a hyperboloid, and on the opposite side. A cylindrical portion 11c for attaching the arc tube 12 protrudes from the top at the end. The concave mirror part 11a, the flange part 11b, and the cylindrical part 11c correspond to the base material of the reflector 11, and a metal material having a thermal conductivity of 10 W / m · K or more is applied to the base material. Aluminum having a conductivity of about 200 W / m · K is used.

The concave inner peripheral surface 11f of the concave mirror portion 11a is a reflective surface, and a metal such as aluminum or silver is deposited on the inner peripheral surface 11f in order to obtain a high reflectance. In addition to metal deposition, the inner peripheral surface 11f may be formed by using a dielectric multilayer film in which a low refractive material such as SiO ₂ and a high refractive material such as TiO ₂ are alternately deposited, or the inner peripheral surface 11f itself is formed. Mirror polishing is also possible.

  The concave mirror portion 11a has a hole 11h for attaching the arc tube 12 so as to communicate the central top portion 11i of the inner peripheral surface 11f with the inside of the cylindrical portion 11c. Further, a fitting surface 11g for fitting the heat conducting member 20 is recessed in the peripheral edge on the flange portion 11b side of the inner peripheral surface 11f, and a sufficient contact area is provided for the heat conducting member 20 to be fitted. Secured. The flange portion 11b has a recess 11e for attaching the explosion-proof glass 29 therein, and the concave mirror portion 11a is provided with a hole portion 11j for drawing out a lead wire d2 of the arc tube 12 described later. (See FIG. 3).

  The arc tube 12 attached to the hole 11h of the reflector 11 is an ultra-high pressure mercury lamp, and as shown in FIG. 4A, a glass support made of quartz glass having sealing portions 13d and 13e provided at both ends. 13 and a pair of tungsten electrodes 14 and 15. The tungsten electrodes 14 and 15 are disposed opposite to the cavity K in the chamber portion 13 c swelled in a spherical shape at the central portion between the sealing portions 13 d and 13 e on both sides of the glass support 13. K contains a predetermined amount of mercury and a rare gas.

  The tungsten electrodes 14 and 15 in the chamber portion 13 are connected so as to be electrically connected to the molybdenum foils 16 and 17 sealed at the end portions 13a and 13b of the glass support 13, respectively. From 17, lead wires d 1 and d 2 extend. The lead wires d1 and d2 are connected to a lighting electric circuit (not shown) so that power can be supplied to the tungsten electrodes 14 and 15.

  FIG. 4B shows the opposing ends of the tungsten electrodes 14 and 15. The tungsten electrodes 14 and 15 are formed with slopes 14a and 15b so that the tips 14a and 15a are apexes, and a range of an angle θ is generated between the slopes 14a and 15b. In the range of the angle θ, high brightness is obtained because light (light flux) generated by the discharge of the tungsten electrodes 14 and 15 can travel directly without interfering with the inclined surfaces 14a and 15b when traveling outward. In addition, the luminance is relatively low in a region outside the range of the angle θ.

  Therefore, when the arc tube 12 is attached to the reflector 11 as shown in FIG. 3, the portion of the light beam radiated from the range of the angle θ of each tungsten electrode 14, 15 is reflected by the inner peripheral surface 11 f of the reflector 11 ( A hatching range surrounded by a two-dot chain line) is a region R having a high light flux density, and portions other than the region R are regions having a light flux density lower than that of the region R. The inner peripheral surface 11f is reflected so that the incident angle and the reflection angle are equal to the tangent at the point where the light forming the light beam and the inner peripheral surface 11f intersect.

  Specifically, the arc tube 12 is attached to the reflector 11 by inserting one end 13a of the glass support 13 forming the arc tube 12 into the hole 11h of the reflector 11, and the axis of the arc tube 12 being the reflector 11. The light emitting point near the center of the chamber portion 13c coincides with the focal point of the reflector 11, and the both are fixed by the fixing agent 18 in this state. By being fixed in this way, the arc tube 12 is supported in a state of protruding inside the reflector 11.

  On the other hand, the heat conducting member 20 (see FIG. 2) connecting the arc tube 12 and the reflector 11 is made of copper, and three extending portions extending radially from a cylindrical outer fitting annular portion 21 provided in the center. 23-25 are provided, and the extending ends of the extending portions 23 to 25 are connected to the ring-shaped fitting annular portion 22, and the surfaces of the respective portions 21 to 25 are polished to ensure gloss and prevent oxidation. It is covered with a membrane. In this embodiment, a product called NL110 manufactured by Clariant Co. is used for the antioxidant film. However, it is possible to apply a quartz coating or silicon dioxide as a component to the antioxidant film.

  As shown in FIGS. 3 and 5, the outer ring-shaped portion 21 in the center has an inner space portion 21 a that is a sealing portion 13 d on the side of the end portion 13 b projecting from the arc tube 12 (part from the chamber portion 13 c to the end portion 13 b: FIG. 4 (a)), and the length is slightly shorter than the sealing portion 13d. Each extension part 23-25 is extended from the surrounding surface of the one end side in the longitudinal direction of such an external fitting annular part 21. As shown in FIG.

  In the extending portions 23 to 25, curved portions 23 a to 25 a are formed at locations on the outer fitting annular portion 22 side, respectively. The bending start points 23b to 25b of the bending portions 23a to 25a coincide with the points where the region R and the extending portions 23 to 25 intersect when the heat conducting member 20 is attached as shown in FIG. The distance T shown in FIGS. 3 and 5 indicates the range where the extending portion 23 intersects the region R, and the point 23c on the center outer ring portion 21 side indicates the end on the center side of the distance T. . Similarly, the other extending portions 24 and 25 intersect with the region R within the range of the distance T.

  Further, the outer fitting annular portion 22 connected to each of the extending portions 23 to 25 has an outer diameter and a width dimension that can be fitted to the fitting surface 11 g of the reflector 11. In this embodiment, the width dimension of the fitting annular portion 22 is about one fifth of the length of the central outer fitting annular portion 21, and this width dimension is equivalent to each of the extending portions 23 to 25. is there. Moreover, the thickness of the external fitting annular part 21, the fitting annular part 22, and each extension part 23-25 which form the heat conductive member 20 is set to the dimension of about 0.5 mm-about 1.0 mm.

  The heat conducting member 20 is attached by fitting the outer fitting annular portion 21 at the center to the sealing portion 13d of the arc tube 12 and fitting the outer fitting annular portion 22 to the fitting surface 11g of the reflector 11. As shown in FIG. 3, the end portion 13 b of the arc tube 12 is attached to the end portion 13 b in a state where the end face of the outer fitting annular portion 21 is aligned. Although not shown in FIG. 3, an adhesive 18 used for fixing the arc tube 12 and the reflector 11 is interposed between the outer ring portion 21 and the sealing portion 13 d of the arc tube 12. Yes. By attaching the heat conducting member 20 in this way, the glass support 13 and the reflector 11 are connected by the heat conducting member 20.

  After attaching the heat conducting member 20 as described above, the lead wire d2 on the protruding side of the arc tube 12 is drawn out of the reflector 11 from the hole 11j, and then explosion-proof in the recess 11e of the flange 11b of the reflector 11 The glass 29 is adhered to complete the explosion-proof light source device 10.

  When necessary connections are made to the lead wires d1 and d2 of the completed light source device 10 and power is turned on, the arc tube 12 emits light and the light source device 10 is turned on. During lighting, the tungsten electrodes 14 and 15 of the arc tube 12 are discharged to generate light and heat. The generated light is reflected by the reflector 11 and passes through the explosion-proof glass 29 as shown in FIG. Is released. At this time, the region R having a high light flux density is blocked only by the extending portions 23 to 25 extending radially from the arc tube 12 side to the reflector 11 side, so that even if the heat conducting member 20 is attached, Irradiation characteristics are hardly deteriorated.

  In addition, since the light irradiated from the light source device 10 is partially blocked by the extending portions 23 to 25 due to the presence of the heat conducting member 20, a shadow is partially generated. However, in the projection type image display device 1, as shown in FIG. 1, since the light emitted from the light source device 10 enters the rod lens 3, the illuminance of the light that has passed through the rod lens 3 due to total reflection at the rod lens 3. Is made uniform. As a result, the shadows of the extending portions 23 to 25 of the heat conducting member 20 are not projected, and no shadow is displayed on the projected image.

  Further, the temperature of the glass support 13 rises due to heat generated in the arc tube 12. There are three forms of heat dissipation in the light source device 10 of the present embodiment: convective heat transfer, radiation, and heat conduction. Among these three forms, heat conduction has the highest efficiency of heat transfer. Is radiation. Hereinafter, heat transfer in each embodiment will be described.

  Convective heat transfer involves the transfer of heat from the arc tube 12 to the reflector 11 via the air confined in the reflector 11 existing around the arc tube 12 and the air present around the arc tube 12. Although heat is transferred from the arc tube 12 to the explosion-proof glass 29 on the front surface side, heat is transferred in two systems. Further, radiation is performed between the arc tube 12 and the reflector 11.

  Finally, there are two heat paths for heat conduction, and the first heat path conducts heat from one end 13a on the side of the arc tube 12 attached to the reflector 11 to the reflector 11 through the fixing agent 18. It is what is done. Note that the above-described convective heat transfer, heat dissipation, and heat conduction related to the first heat path also occur in the conventional explosion-proof light source device.

  The second heat path for heat conduction is a feature of the light source device 10 of the present invention. From the sealing portion 13d of the arc tube 12 protruding from the chamber portion 13c to the reflector 11 through the heat conduction member 20. Heat is conducted. The arc tube 12 has the highest temperature in the chamber portion 13c, and the heat of the chamber portion 13c is transmitted to the sealing portion 13d on the protruding side, so that the temperature of the sealing portion 13d rises. The heat of the portion 13d is moved to the reflector 11 through a heat path called the heat conducting member 20, and the temperature rise of the sealing portion 13d is suppressed to extend the life of the arc tube 12.

  In particular, in the present embodiment, since the outer fitting annular portion 21 on the center side of the heat conducting member 20 is fitted with the sealing portion 13d from the immediate vicinity of the chamber portion 13c, the sealing portion 13d and the outer fitting annular portion 21 are fitted. Means that the heat transferred from the chamber portion 13c to the sealing portion 13d, which has a sufficient contact area and becomes high temperature, can be efficiently transferred to the outer ring-shaped portion 21 (heat conducting member 20). Moreover, the heat which moved to the external fitting annular part 21 moves to the direction of the extension destination of the extension parts 23-25 of 3 directions, and goes to the outer fitting annular part 22. FIG. The heat moved to the outer fitting annular portion 22 through the extending portions 23 to 25 then moves to the reflector 11 through the fitting surface 11g in contact with the fitting annular portion 22.

  The heat transfer from the sealing portion 13d of the arc tube 12 to the reflector 11 through the heat conducting member 20 is started when the temperature of the sealing portion 13d becomes higher than that of the heat conducting member 20 and the reflector 11. This is performed until the temperature of the sealing portion 13d becomes lower than that of the heat conducting member 20 and the reflector 11. Moreover, the heat dissipation with respect to the chamber part 13c can be improved, so that the dimension of the longitudinal direction of the external fitting annular part 21 fitted to the sealing part 13d of the arc tube 12 is set so as to be close to the chamber part 13c. On the contrary, if it sets so that it may leave | separate from the chamber part 13c, heat dissipation can be improved targeting the sealing part 13d.

  Since the reflector 11 itself has a heat radiation characteristic, the heat transferred from the arc tube 12 is finally radiated by the reflector 11. Therefore, the arc tube 12 is cooled by the heat conducting member 20, the temperature of the chamber portion 13c, which is high during lighting, is suppressed to 800 ° C. to 1000 ° C. or less, and the temperature of the sealing portion 13d on the protruding side is The temperature is surely kept below 400 ° C. Therefore, it becomes possible to input 200 W or more electric power exceeding 150 W, which is the upper limit in the conventional explosion-proof specification, to the arc tube 12, and the light source device 10 of the present embodiment conducts heat in addition to the conventional heat release path. Since the path by the member 20 exists, the luminous tube 12 is maintained at the above-mentioned temperature even during lighting, and the high luminance characteristics are ensured compared with the conventional case by turning on the power of 200 W or more.

  On the other hand, while the light source device 10 is turned on, the heat conducting member 20 (particularly the extending portions 23 to 25) is irradiated with the light beam reflected by the reflector 11, but the surface of the heat conducting member 20 is ensured to be glossy by polishing. Therefore, the irradiated light flux is reflected on the surface to reduce the rate at which the heat conducting member 20 (extending portions 23 to 25) absorbs heat. In addition, since the surface of the heat conducting member 20 is covered with an anti-oxidation film, the surface is prevented from being clouded during lighting and the glossiness is prevented from being lowered.

  The reflection on the surface of the heat conducting member 20 described above suppresses the temperature rise due to the irradiation of the light flux, but the copper is made by conducting heat for a long time and conducting heat from the arc tube 12 to the reflector 11. The temperature of the heat conducting member 20 itself rises and thermal expansion occurs.

  As shown in FIG. 5, the thermal expansion in the extending portions 23 to 25 of the heat conducting member 20 is in the radial direction (radial direction), but the extending portions 23 to 25 are provided with curved portions 23 a to 25 a. Therefore, the expansion in the radial direction is converted into the direction along the curved portions 23a to 25a (the black arrow direction in the figure), and finally the expansion is tangent at the connecting point with the outer fitting annular portion 22 It becomes an extension in the direction. As a result, it is possible to prevent unnecessary stress due to thermal expansion of the heat conducting member 20 from being applied to the arc tube 12 that is externally fitted at the center external ring portion 21, and the light source device due to misalignment of the arc tube 12. No change occurs in the radiation characteristics of the 10 luminous fluxes, and the glass support 13 constituting the arc tube 12 is not broken by the thermal expansion of the heat conducting member 20.

  The projection type image display device 1 and the light source device 10 according to the present invention are not limited to the above-described embodiments, and various modifications can be applied. For example, a cooling fan that forcibly cools the light source device 10 may be applied to the projection-type image display device 1. By applying the cooling fan in this way, the heat dissipation of the reflector 11 can be improved and turned on. Stable lighting can be secured even if the power value is further increased to increase the brightness. Further, the light source device 10 can be made not to correspond to the explosion-proof specification by omitting the explosion-proof glass 29. In this case, since the air can be blown into the reflector 11, the cooling characteristics can be further enhanced by the combination with the heat conduction by the heat conducting member 20.

  Furthermore, as the heat conducting member 20 of the light source device 10, other metal materials such as aluminum having good thermal conductivity can be applied as materials other than copper, and ceramics made of aluminum nitride other than the metal materials. You may apply. In addition, in order to improve the glossiness of the surface of the heat conductive member 20, it is preferable to perform surface treatment by plating or vapor deposition in addition to performing mirror polishing. In order to maintain such glossiness of the surface, in addition to coating with an antioxidant film as described above, an antioxidant gas may be filled in the reflector 11 in the case of explosion-proof specifications.

  Further, the number of the extending portions 23 to 25 of the heat conducting member 20 is not limited to three, and the number is not limited as long as it is one or more. In this case, the smaller the number, the smaller the degree of blocking the light beam reflected by the reflector 11, and the larger the number, the higher the thermal conductivity of the heat conducting member 20.

  Further, the fitting annular portion 22 on the outer side of the heat conducting member 20 can be fitted to the inner peripheral surface side of the reflector 11 and can be fitted to the outer peripheral surface side when the light source device 10 is not explosion-proof. Become. In this case, the reflector 11 omits the opening-side flange portion 11b, and the fitting annular portion 22 has an inner diameter set to a dimension that can be fitted to the outer peripheral surface side of the opening peripheral edge of the reflector 11, and the fitting annular portion 22 By providing a fitting margin by making the width longer than the width of each extending portion 23-25, the fitting annular portion 22 is made in a state in which each extending portion 23-25 is in contact with the opening side end surface of the reflector 11. It can also be fitted to the outer peripheral surface side of the reflector 11.

  Furthermore, the heat conducting member 20 can be configured such that the outer fitting annular portion 22 itself is omitted. By doing in this way, the structure of the heat conductive member 20 can further be simplified and cost reduction can be aimed at. When the fitting annular portion 22 is omitted, the extending ends of the extending portions 23 to 25 are fitted so as to directly contact the inside of the reflector 11, but the extending portions 23 are fitted to the reflector 11. It is also possible to provide a notch such as a slit for fitting ˜25 to enhance the contact between each of the extending portions 23 to 25 and the reflector 11.

  FIG. 6 shows a heat conductive member 30 according to a modification. The heat conducting member 30 of this modification is characterized in that curved portions 33d to 35d are also provided on the center of the extending portions 33 to 35 on the outer ring portion 31 side. Since the bending start point 33c of the central curved portion 33d is a point on one side of the distance T intersecting with the region R having a high luminous flux density, the curved portion 33d blocks a portion where the density of the luminous flux reflected by the reflector 11 is high. This is not the case, and the same applies to the other music parts 34d and 35d. Thus, by providing the two bent portions 33a to 35a and 33d to 35d on each of the extended portions 33 to 35, the extension due to thermal expansion can be absorbed further, and the influence due to thermal expansion can be reduced. it can. In addition, in the heat conductive member 30 of this modification, when it is difficult to provide the outer curved portions 33a to 35a due to the shape of the reflector 11, the outer curved portions 33a to 35a can be omitted.

  FIGS. 7A to 7C show heat conductive members 40 to 60 of another modification. The heat conducting member 40 of FIG. 7A is obtained by connecting a central outer ring portion 41 and an outer fitting ring portion 42 by linear extending portions 43 to 45, and each extending portion 43. No. 45 has no music part. This is suitable when a ceramic material that hardly causes thermal expansion is applied to the material of the heat conducting member 40.

  The heat conductive member 50 of FIG.7 (b) connects the arc-shaped fitting part 52a-52c divided to each extension part 53-55 extended from the center external fitting annular part 51, FIG. The heat conducting member 60 of (c) is obtained by extending each extending portion 63 to 65 from each of the arcuate outer fitting portions 61a to 61c divided on the center side, and connecting the fitting annular portion 62 to the extending end. It is. Since each of the heat conducting members 50 and 60 is provided with the arcuate fitting portions 52a to 52c or the arcuate outer fitting portions 61a to 61c divided on the outer side or the center side, the heat at the outer side or the center side fitting portion is provided. The influence by expansion can be reduced. In addition, the structure of the heat conductive members 50 and 60 of a modification is applicable also to the heat conductive members 20 and 30 shown in FIG.

FIG. 8A shows a modified light source device 10 ′. This light source device 10 ′ is obtained by providing a modified heat conduction member 70 on the reflector 11 to which the above-described arc tube 12 is attached. The heat conduction member 70 of the modified example is such that the extension part 73, 74 (the third extension part is not shown) extends from the center outer fitting annular part 71 on the chamber part 13c side of the arc tube 12. It is characterized by having moved to. Incidentally, each of the extension portions 73, 74 extending end is provided at a position so as not to interfere with the high region R of the light flux density, corresponding to the inner peripheral curved face of the outer fitting annular portion 72 reflector 11 It is in shape.

  In the heat conducting member 70 of this modification, the length dimension L2 in the radial direction of each of the extension parts 73 to 74 is the length dimension from the projecting side end 71b of the center-side outer fitting annular part 71 to the reflector 11. Since it can be shorter than L1, the path length of heat conduction can be shortened, and the heat conduction efficiency can be improved. The configuration of the heat conducting member 70 of this modification is also suitable for a type of light source device that is not explosion-proof and has a dimension in which the axial length of the arc tube 12 protrudes beyond the reflector 11.

  FIG. 8B shows a light source device 10 ″ according to another modified example. This light source device 10 ″ is obtained by providing a heat conducting member 80 according to a modified example on the reflector 11 to which the arc tube 12 is attached. The heat conduction member 80 according to the modified example has a width dimension of extending portions 83 and 84 (a third extending portion is not shown) extending from the center outer fitting annular portion 81 and an outer fitting annular portion 82. A characteristic is that W is made longer than the heat conducting member 20 shown in FIG. By doing in this way, the cross-sectional area orthogonal to the extension direction of the extension parts 83 and 84 can be enlarged compared with each extension part 23 and 24 of the heat conductive member 20 shown in FIG. 3, and heat transfer efficiency is improved further. Can be improved.

  FIG. 9 shows a light source device 100 of a modified example that is not explosion-proof specification. This light source device 100 is provided with a heat conducting member 90 of a modified example on a reflector 11 ′ to which the arc tube 12 is attached. The heat conducting member 90 of the modified example does not cover the entire sealing portion 13 of the arc tube 12, but is provided with an outer fitting annular portion 91 having a length covering the sealing portion 13d in the vicinity of the protruding end portion 13b. Extending portions 93 and 94 (a third extending portion is not shown) are extended from the outer fitting annular portion 91, and an outer fitting annular portion 92 is provided at the extending end. The heat conducting member 90 of this modified example is easy to manufacture because the width of the outer fitting annular portion 91, the extending portions 93 and 94, and the fitting annular portion 92 is equal, and the arc tube 12 having the lowest heat resistance. The heat can be intensively transferred from the end portion 13 b of the sealing portion 13.

  Furthermore, when the heat conductive member 90 of the modified example is formed of an electrically conductive material, the lead wire is not extended from the molybdenum foil 17 on the projecting side of the arc tube 12, and the extension portion 94 is provided. An L-shaped contact portion 96 that is in conductive contact with the molybdenum foil 17 is provided in the lead wire d3 and the fitting annular portion 92 through the hole 11j 'of the reflector 11' provided at the fitting portion of the outer fitting annular portion 92. And may be joined. By doing in this way, the heat conductive member 90 can be utilized as a part of lead wire with respect to the arc_tube | light_emitting_tube 12, and the wiring structure of the light source device 100 can be simplified.

  FIG. 10A shows a reflector 111 of a modification applied to the light source device of the present invention. The reflector 111 of the modified example is characterized in that the thermal diffusivity of the reflector 111 is improved by covering the inner peripheral surface 111f of the concave mirror portion 111a with the thermal diffusion film 115. The thermal diffusion film 115 has a three-layer structure, and includes an infrared heat conversion layer 112, a gloss buffer layer 113, and a visible light reflection layer 114 from the inner peripheral surface 111f side.

  The infrared heat conversion layer 112 is formed by anodizing the inner peripheral surface 111f, and absorbs light in a wavelength region that passes through the visible light reflection layer 114 and the gloss buffer layer 113 to efficiently convert heat. is there. The gloss buffer layer 113 is formed on the infrared heat conversion layer 112 by baking a Si-based resin or a polyimide-based resin at a high temperature so that the infrared conversion layer 112 and the visible light reflecting layer 114 are not in direct contact with each other. It is intended to buffer both. The visible light reflection layer 114 is formed on the gloss buffer layer 113 and reflects visible light. Therefore, the reflector 111 of the modified example includes the thermal diffusion film 115 having the above-described laminated structure, so that heat can be efficiently diffused even when the luminous flux emitted from the arc tube 12 is reflected, and the deterioration of the reflecting surface is prevented. It is out.

  FIG.10 (b) has shown the reflector 121 of another modification applied to the light source device of this invention. The reflector 121 of this modification is characterized in that a large number of heat radiation fins 130a to 130i are projected from the outer peripheral surface 121k of the concave mirror part 121a. In addition, although the infrared heat conversion layer 122, the gloss buffer layer 123, and the visible light reflection layer 124 are provided on the inner peripheral surface 121f of the concave mirror 121a, each layer can be omitted.

  By providing the radiation fins 130a to 130i in this manner, the reflector 121 can greatly increase the contact area with the air existing in the surrounding area, and the heat radiation characteristics can be improved. The radiating fins 130a to 131i may be provided integrally with the concave mirror part 121a or provided separately, and the protruding direction is not parallel to the protruding direction of the cylindrical part 121c, but from the outer peripheral surface 121k. You may project in the radial direction.

  FIG. 11A shows a reflector 131 of still another modified example. Unlike the reflector 111 in FIG. 10A, the reflector 131 does not cover the entire inner peripheral surface 111f with the heat diffusion film 115, but the portion where the heat conducting member 20 is attached is the infrared heat conversion layer 132, The fitting surface 131g of the heat conducting member 20 was formed by exposing the base material of the concave mirror part 131a of the reflector 131 without providing the heat diffusion film 135 composed of the gloss buffer layer 133 and the visible light reflecting layer 134. Is a feature.

  Therefore, when the heat conducting member 20 is attached to the reflector 131 as shown in FIG. 11B, the fitting annular portion 22 provided at the end of the extending portion 24 directly contacts the fitting surface 131g, Even when the thermal diffusion film 135 is provided, heat can be smoothly transferred from the heat conducting member 20 to the reflector 131. Note that the reflector 131 shown in FIGS. 11A and 11B can correspond to the various heat conducting members 20 to 90 described above, and is different from the reflector 121 provided with the radiation fins 130a to 130i shown in FIG. However, the structure which exposes the base material which concerns on the reflector 131 is applicable.

  FIG. 12 shows a non-explosion-proof specification light source device 210 according to another modified example. In this light source device 210, a total of three slits 211h to 211j are formed on the edge 211b of the opening 211d of the reflector 211 (concave mirror portion 211a). While being formed, the heat conducting member 220 is characterized in that the fitting annular portion 42 is omitted from the heat conducting member 40 shown in FIG. In order to attach the heat conducting member 220 to the reflector 211, the outer fitting annular portion 221 is fitted on the sealing portion 13d of the arc tube 12 (glass support 13) attached in advance to the reflector 211, and each extending portion 223 is fitted. The extended ends 223a to 225a of ˜225 are fitted into the slits 211h to 211j of the reflector 211 (concave mirror portion 211a), respectively (see FIG. 13). As described above, in the light source device 210 according to the modification, the heat conducting member 220 can be easily attached.

  Further, when light is emitted by the completed light source device 210, when the heat conducting member 220 is made of metal, each of the extending portions 223 to 225 expands in the extending direction due to irradiation of the reflected light from the reflector 211. Even if the curved portions 23a to 25a are not provided as in the case of the heat conducting member 5 of 5, the arc tube 12 is not subjected to stress due to thermal expansion. The width dimensions of the slits 211h to 211j provided corresponding to the extending directions of the extending portions 223 to 225 should be set so as to have a press fit (an interference fit or an intermediate fit) with respect to the extending ends 223a to 225a. Both can be set to loose fit (clear fit). When set to press fit, the heat conductive member 220 can be attached only by fitting the extended ends 223a to 225a, and when set to loose fit, a sticking agent having good heat conductivity is used. It is preferable to fix the heat conducting member 220. Note that various configurations according to the heat conductive members 60 to 90 shown in FIGS. 7B to 9 can be applied to the heat conductive member 220.

  FIG. 14A shows a heat conducting member 240 according to another modification. The heat conducting member 240 has a structure in which bent portions are provided at the extending ends 223a to 225a of the heat conducting member 220 in FIG. 12, and specifically, an extending portion 243 extending from the outer fitting annular portion 241. The tip portions of ˜245 are bent in an L shape to form bent portions 243a˜245a, and through holes 243b˜245b are formed in the respective bent portions 243a˜245a. On the other hand, as shown in FIG. 14 (b), the reflector 231 to which the heat conducting member 240 is attached is basically provided with a slit 231h, similar to the reflector 211 of FIG. 12, but the edge near the slit 231h. A screw hole 231k is formed in the portion 231b.

Therefore, when the heat conducting member 240 is attached to the reflector 231, the ends of the extending portions 243 to 245 are fitted into the slit 231h, and the bent portions 243a to 245a are externally fitted to the outer peripheral surface 231c of the reflector 231 ( concave mirror portion 231a). To do. In this state, as shown in FIG. 14B, the screw N is passed through the through holes 243 b to 245 b and screwed into the screw holes 231 k to fix the bent portions 243 a to 245 a to the reflector 231.

  In this way, by screwing, the heat conducting member 240 is firmly attached to the reflector 231. Therefore, the heat conducting member 240 does not come off even when subjected to vibration accompanying the movement of the projection type image display device, etc. In addition, since the bent portions 243a to 245a reliably contact the reflector 231, heat conduction can be appropriately performed. Note that, instead of screwing, an adhesive with good thermal conductivity, brazing, or the like may be applied. If the bent portions 243a to 245a can be firmly fixed only by external fitting, the screwing is omitted. Alternatively, the through holes 243a to 245a and the screw holes 231k can be omitted when the screws are not fixed.

  Fig.15 (a) has shown the attachment state which concerns on another modification. The reflector 231 ′ used in this modification has a configuration in which the slit 231h is omitted from the reflector 231 in FIG. 14B, and a screw hole 231k ′ is provided. Further, the heat conducting member 243 is basically the same as the configuration shown in FIG. 14A, but the extension dimension of each of the extension parts 243 to 245 is shortened, and the bent parts 243a to 245a of the reflector 231 ′ are reduced. The dimension is set to abut against the inner peripheral surface 231f ′. The heat conducting member 240 is attached to the reflector 231 'by fitting the bent portions 243a to 245a into the inner peripheral surface 231f' of the reflector 231 'and passing the screw N through the through holes 243a to 245a in this state. The bent portions 243a to 245a are fixed to the reflector 231 by screwing to 231k. Therefore, the heat conducting member 240 is firmly fixed to the reflector 231 ′ and can smoothly transfer heat to the reflector 231 ′ through the bent portions 243a to 245a.

FIG. 15B is a modification to the configuration shown in FIG. 15A, and the heat conducting member 240 ′ has a through-hole formed in the bent portion 243a ′ provided at the extending end of the extending portion 243 ′. The reflector 231 ″ is not provided with a screw hole in the edge portion 231b ″. In the modification shown in FIG. 15 (b), the bent portion 243a ′ is fitted into the inner peripheral surface 231f ″ of the reflector 231 ″ in a press-fit manner , or a fixing agent having good brazing or thermal conductivity is used. This eliminates the need for screwing.

  FIG. 16 shows a light source device 250 according to yet another modified example. In this light source device 250, an explosion-proof glass (not shown) provided at a position that is one step deeper than the edge 251b of the opening 251d on the reflection side of the reflector 251. ) Recesses 251f to 251h having screw holes 251i to 251k formed in the end surface 251c of the mounting recess 251e. Further, the heat conducting member 260 is configured such that bent portions 263b to 265b parallel to the end surface 251c of the reflector 251 are further provided at the extending end of the heat conducting member 240 shown in FIG. Specifically, the extending ends 263 to 265 extending from the outer fitting annular portion 261 are bent once in an L shape so as to be orthogonal to the extending direction to form bent portions 263a to 265a. Then, the end portion on the rear end side of the bent portions 263a to 265a is again bent into an L shape to provide bent portions 263b to 265b having surfaces parallel to the end surface 251c of the reflector 251, and each bent portion 263b. Through holes 263c to 265c are formed in .about.265b.

  In order to attach the heat conducting member 260 to the reflector 251, the outer fitting annular portion 261 is fitted on the sealing portion 13 d of the arc tube 12 (glass support 13) previously attached to the reflector 251, and each bent portion 263 b. ˜265b are housed in recesses 251f to 251h provided on the end surface 251c of the reflector 251, and the screw N is passed through the through holes 263c to 265c and screwed into the screw holes 251i to 251k (see FIG. 17B). Since this screwing operation can be performed from the end surface 251c side of the reflector 251, the workability is good. The light source device 250 is completed by attaching the explosion-proof glass (not shown) to the recess 251e after attaching the heat conducting member 260 in this way.

  In such a light source device 250, since the bent portions 263b to 265b of the heat conducting member 260 are in contact with the end surface 251c of the reflector 251, heat can be transferred from the heat conducting member 260 to the reflector 251 through the bent portions 263b to 265b. . Note that the bent portions 263b to 265b may be attached using an adhesive having a good brazing property or thermal conductivity. In addition, the light source device 250 shown in FIGS. 16 and 17 can be designed to have no explosion-proof glass attached.

  FIG. 18A shows a cross section (cross section orthogonal to the extending direction) of the extending portion 263 of the heat conducting member 260 shown in FIG. (Corresponding to the first direction) is a direction parallel to the longitudinal direction of the arc tube 12 attached to the reflector 251 shown in FIG. 16 in the cross section, and the Y direction (corresponding to the second direction) in the figure is The direction is orthogonal to the Z direction. Therefore, since the cross section of the extending portion 263 has a dimension w corresponding to the Z direction and a dimension t (width dimension) corresponding to the Y direction, even if a predetermined cross sectional area necessary for heat conduction is secured. Since the width in the Y direction is small, the degree of blocking the reflected light of the reflector 251 is minimized.

  18B shows a cross-sectional shape of a modified example of the extending portion 263 of FIG. 18A, and the cross-sectional shape of the extended portion 263 ′ of the modified example corresponds to the attachment side of the reflector 251 of the arc tube 12. FIG. The wedge is formed in a wedge shape with the taper side apex 263d '. In addition, the extension part 263 'of the modified example has an end side part 263e' on the opening side of the dimension t in FIG. 18 so that a cross-sectional area equivalent to that of the extension part 263 in FIG. On the other hand, the dimension in the Z direction is set longer than that of the extending portion 263 in FIG. By making the cross section wedge like this, the amount of light (light rays) blocked by the extending portion 263 can be minimized.

  FIG. 18C is a view obtained by superimposing the cross-sectional shapes shown in FIGS. 18A and 18B. Specifically, the light beams L1 and L2 that form the light beam reflected by the reflector 251 are shown in FIG. The extended portion 263 having a rectangular cross section indicated by the middle two-dot broken line is blocked by interference with the end portion 263d. However, since the light rays L1 and L2 travel while being slightly expanded due to the influence of being reflected by the reflecting surface having a curvature, the extended portion 263 ′ having a wedge-shaped cross section passes through the apex 263d ′ and the inclined surface 263f ′, If it does not interfere with 263g ′, it can pass through the extending portion 263 ′, so that the amount of light blocked by the extending portion 263 ′ can be minimized. The cross-sectional forms shown in FIGS. 18A and 18B are naturally applicable to the above-described heat conductive members 20 to 90, 220, 240, and 240 ′.

  Further, the arc tube 12 attached to each of the reflectors 11, 11 ′, 111, 121, 131, 211, 231, 231 ′, 231 ″, 251 constituting the various light source devices of the first embodiment includes ultrahigh pressure mercury. In addition to the lamp, a metal halide lamp, a halogen lamp, etc. can be applied, and the configuration of the projection-type image display device 1 according to the present invention and the light source devices 10, 10 ′, 10 ″, 100, 210, 250 (the heat conducting member described above). And those to which the respective modifications of the reflector are applied) can be applied to either the front projection system or the rear projection system.

  19 and 20 show a light source device 300 according to the second embodiment of the present invention. In the light source device 300 of the second embodiment, the first heat conducting member 320 is attached to the sealing portion 302b side that is the protruding side of the arc tube 301 attached to the reflector 311 and the second sealing portion 302a that is the attachment side is also second. It is characterized in that the heat conducting member 330 is attached. In the second embodiment, by attaching the heat conducting members 320 and 330 to both sides of the arc tube 301, the sealing portions 302a and 302b on both sides of the glass support 302 of the arc tube 301 and the central chamber portion 302c are effective. To take away heat. The arc tube 301 has the same configuration as that shown in FIG.

  The reflector 311 is basically the same as that of the first embodiment, and is provided with a cylindrical portion 311c on the apex side of the concave mirror portion 311 and communicates with the inside of the reflector 311 in order to attach the arc tube 301 inside the cylindrical portion 311c. The hole 311g to be formed is formed. The hole 311g has a larger hole diameter than the first embodiment in order to pass through the pipe portion 331 of the second heat conducting member 330. Further, the reflector 311 has a total of three screw holes 311h to 311j formed in the end surface 311b on the opening 311d side.

  On the other hand, the 1st heat conductive member 320 is the structure equivalent to the heat conductive member 260 which concerns on the modification of 1st Embodiment shown in FIG. 16, and the extension parts 323-325 extended from the external fitting annular part 321 are the same. Bending portions 323a to 325a are formed on the extending end side, bent portions 323b to 325b are provided on the rear end sides of the bent portions 323a to 325a, and through holes 323c to 325c are formed in the bent portions 323b to 325b. ing.

  The second heat conducting member 330 (corresponding to the mounting side heat conducting member) has a pipe portion 331 having a length equivalent to that of the sealing portion 302a on the mounting side of the arc tube 301, and a reflector 311 of the pipe portion 331. The fins 332 to 337 for heat radiation are projected radially from the outer peripheral surface on the side of the other end 331b opposite to the one end 331a on the mounting side. In addition, the material equivalent to the 1st heat conductive member 320 can be applied to the material of the 2nd heat conductive member 330, and aluminum whose heat conductivity is about 200 W / m * K is used also in 2nd Embodiment. The pipe portion 331 has an inner diameter that allows the sealing portion 302 a of the arc tube 301 to be fitted outside, and an outer diameter that can fit within the hole 311 g of the reflector 311.

  In assembling the light source device 300 according to the second embodiment, first, an adhesive (not shown) having good thermal conductivity is applied around the sealing portion 302a on the mounting side of the arc tube 301, and the second thermal conductivity is applied. A similar fixing agent 305 is also applied to the outer peripheral surface of the pipe portion 331 of the member 330 on the one end portion 331a side. Next, the sealing portion 302a of the arc tube 301 is inserted into the hole 311g of the reflector 311. Then, the pipe portion 331 of the second heat conducting member 330 is externally fitted to the sealing portion 302a of the arc tube 301, and the reflector. It fits in the hole 311g of 311. When the fixing agent is solidified in this state, the arc tube 301 is fixed in the hole 311g in a state of protruding in the reflector 311. After the arc tube 301 is attached in this way, the first heat conducting member 320 is attached as in the first embodiment.

  As shown in FIG. 20, the completed light source device 300 is generated in the sealing portion 302 a because the pipe portion 331 of the second heat conducting member 330 connects the sealing portion 302 a on the attachment side of the arc tube 301 and the reflector 311. In addition to the sealing portion 302 a itself, heat can be conducted to the reflector 311 also in the pipe portion 331. Moreover, the pipe portion 331 has one end portion 331a protruding from the inner peripheral surface 311f of the reflector 311 by the dimension X1 and close to the chamber portion 301c, so that the heat of the chamber portion 301c having the highest temperature is also transferred to the reflector 311 through the pipe portion 331. It becomes possible to make it.

  Further, the pipe portion 331 is connected to the pipe portion 331 because the other end portion 331b side extends outward through the hole 311g of the reflector 311 and the fins 332 to 337 protrude from the extended portion. Part of the heat moves to the outside of the reflector 311 through the pipe portion 331 without moving to the reflector 311, and is directly radiated from the fins 332 to 337. Therefore, the heat radiation burden of the reflector 311 is reduced, and a large amount of heat radiation can be performed by the reflector 311 and the fins 332 to 337 as a whole. In the sealing portion 302b on the protruding side of the arc tube 301, heat is conducted to the reflector 311 by the first heat conducting member 320 as in the first embodiment. Therefore, the arc tube 301 is cooled by heat being smoothly taken away by the heat conducting members 320 and 330 on both sides.

  The light source device 300 according to the second embodiment is the same as that of the first embodiment except for the configuration described above, and can be applied to both a front projection type and a rear projection type projection image display device. In the second embodiment, modifications other than the configurations shown in FIGS. 19 and 20 can be applied.

  FIG. 21A shows a modified light source device 300 ′. The light source device 300 ′ uses the arc tube 301, the reflector 311, and the first heat conducting member 320 shown in FIG. The feature is that the member 340 includes only the pipe portion 341. The pipe portion 341 externally fits the sealing portion 302a on the mounting side of the arc tube 302, and is fitted inside the hole portion 311g to connect the sealing portion 302a and the reflector 311 through the fixing agent 305. Also in this modified example, since the heat path by the pipe part 341 leading to the reflector 311 exists on the sealing part 302a side on the attachment side, the heat generated in the chamber part 302c and the sealing part 302a is efficiently conducted to the reflector 311. be able to.

  FIG. 21B shows a light source device 350 according to another modification. The light source device 350 is cylindrical from the hole periphery of the hole portion 351g of the cylindrical portion 351c of the reflector 351 instead of the second heat conducting member. A feature is that a protruding heat conduction portion 351h is protruded. The inner diameter of the hole portion 351b is set to a dimension that allows the sealing portion 302a of the arc tube 301 to be inserted, and the protrusion margin from the inner peripheral surface 351f of the protruding heat conducting portion 351h is the light emission attached to the hole portion 351g. The dimensions are close to the chamber portion 302 c of the tube 301. Note that the heat conducting member 320 is attached to the protruding portion 302b of the arc tube 301 in the same manner as described above.

  Also in the light source device 350 of this modified example, the projecting heat conducting part 351h communicating with the reflector 351 connects the sealing part 302a and the concave mirror part 351a of the reflector 351 on the mounting side sealing part 302a side. Heat generated in the chamber portion 302c and the sealing portion 302a can be efficiently conducted to the reflector 351. Note that various modifications according to the first embodiment can be applied to the light source devices 300, 300 ′, and 350 described in the second embodiment, and in particular, a sealing portion on the protruding side of the arc tube 301. The various heat conducting members 20 to 90, 220, 240, and 240 ′ described in the first embodiment can be applied to the first heat conducting member 320 (heat conducting member) attached to 302b.

It is a block diagram which shows the internal structure of the projection type image display apparatus which concerns on 1st Embodiment of this invention. It is a perspective view which shows the decomposition | disassembly state of the light source device of 1st Embodiment. It is sectional drawing which shows the light source device of 1st Embodiment. (A) is the schematic of an arc_tube | light_emitting_tube, (b) is the enlarged schematic diagram which expanded the tungsten electrode of the arc_tube | light_emitting_tube. It is a front view of a heat conductive member. It is a front view of the heat conductive member of a modification. (A)-(c) is a front view of the heat conductive member of another modification. (A) (b) is sectional drawing which shows the light source device of a modification. It is sectional drawing which shows the light source device of another modification. (A) (b) is sectional drawing which shows the reflector of a modification. (A) is sectional drawing which shows the reflector of another modification, (b) is a principal part expanded sectional view of the reflector which attached the heat conductive member. It is a perspective view which shows the decomposition | disassembly state of the light source device of a modification. It is a front view of the light source device of a modification. (A) is a perspective view of the heat conductive member of a modification, (b) is a principal part enlarged view which shows the state which attaches the heat conductive member of a modification to a reflector. (A) is a principal part enlarged view which shows the state which attaches the heat conductive member of another modification to a reflector, (b) is a principal part which shows the attachment location to the reflector of the heat conductive member which concerns on another modification. It is an enlarged view. It is a perspective view which shows the decomposition | disassembly state of the light source device of another modification. It is a principal part expanded sectional view which shows the state which attaches the heat conductive member of a modification to a reflector. (A) is the schematic which shows the cross section of the extension part, (b) is the schematic which shows the cross section of a modification, (c) is the schematic which compared the cross section of (a) and the cross section of (b). . It is a perspective view which shows the decomposition | disassembly state of the light source device which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the light source device of 2nd Embodiment. (A) is sectional drawing which shows the light source device of the modification of 2nd Embodiment, (b) is sectional drawing which shows the light source device of another modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projection type image display apparatus 2 Color wheel 7 DMD
DESCRIPTION OF SYMBOLS 8 Projection lens 10 Light source device 11 Reflector 11f Inner peripheral surface 12 Light emission tube 13 Glass support body 13c Chamber part 13d, 13e Sealing part 14, 15 Tungsten electrode 20 Thermal conduction member 21 Outer fitting annular part 22 Fitting annular part 23-25 Extension part 23a-25a Bending part 115 Thermal diffusion film 130a-130i Radiation fin 330 2nd heat conduction member 332-337 Fin d1, d2 Lead wire R Area | region with high light flux density

Claims (20)

One end of the arc tube is attached to the reflector so that the arc tube protrudes from the center of the reflector having a concave inner peripheral surface as a reflection surface to the reflection side. In the light source device in which a pair of electrodes are arranged to face each other in the chamber portion formed in
A heat conduction member that connects the sealing portion on the side protruding from the chamber portion of the arc tube and the reflector ;
The heat conducting member has an extending portion extending radially from the arc tube side to the reflector side,
The light source device characterized in that the shape of the cross section perpendicular to the extending direction of the extending portion is wedge-shaped, and the mounting direction of the arc tube is on the wedge-shaped tapered side .   The light source device according to claim 1, wherein a base material of the reflector is a metal material. The light source device according to claim 1 , wherein a curved portion is formed in the extension portion. The pair of electrodes arranged opposite to each other of the arc tube has a slope formed from the apex side to the opposite side so that the tip facing both is the apex,
The light source device according to claim 3 , wherein the curved portion is formed outside a region where a light beam emitted between the inclined surfaces of the two electrodes is reflected by the reflector . The heat conducting member includes an outer fitting annular portion for fitting the arc tube,
The light source device according to any one of claims 1 to 4 , wherein the extension portion extends from the outer fitting annular portion. The heat conducting member includes a fitting annular portion fitted to the peripheral surface of the reflector,
6. The light source device according to claim 1 , wherein an extending end of the extending portion is connected to the fitting annular portion. A bent portion is provided at the extended end of the extended portion,
The light source device according to claim 1 , wherein the bent portion is in contact with an inner peripheral surface of the reflector. A bent portion parallel to the end face of the reflection side opening of the reflector is provided at the extension end of the extension portion,
6. The light source device according to claim 1 , wherein the bent portion is in contact with an end face of a reflection-side opening of the reflector. A slit is formed at a location of the reflector corresponding to the extending direction of the extending portion of the heat conducting member,
The light source device according to claim 1 , wherein an extending end of the extending portion is fitted to the slit. A bent portion is provided at the extended end of the extended portion,
The light source device according to claim 9 , wherein the bent portion is in contact with an outer peripheral surface of the reflector. The shape of the wedge-shaped cross section perpendicular to the extending direction of the extending portion is such that the dimension in the first direction parallel to the longitudinal direction of the arc tube is larger than the dimension in the second direction orthogonal to the first direction. 11. The light source device according to claim 1 , wherein the light source device is large. The light source device according to claim 1 , wherein a surface of the heat conducting member is covered with an antioxidant film. The inner peripheral surface of the reflector is covered with an infrared heat conversion layer that converts infrared rays into heat, and the opposite side of the infrared heat conversion layer from the inner peripheral surface of the reflector is covered with a visible light reflecting layer that reflects visible light. The light source device according to claim 1 , wherein the light source device is a light source device. The light source device according to claim 13 , wherein a base material of the reflector is exposed at a place where the heat conducting member of the reflecting surface is connected. The light source device according to claim 1 , wherein the reflector includes a heat radiating fin on an outer peripheral surface. Protruding heat conduction part protruding from the inner peripheral surface of the reflector,
Projecting heat output conductive portion, any one of claims 1 to 15, characterized in that from the chamber part of the arc tube are so connect the said sealing portion of the mounting side reflector to the reflector The light source device according to one. The mounting side heat conduction member which connects the sealing part by the side of the attachment to the reflector from the chamber part of the arc tube, and the reflector is provided, The statement of any 1 paragraph of Claims 1 thru / or 15 characterized by things . Light source device. The attachment-side heat conduction member extends outward of the reflector through a location where the arc tube is attached to the reflector,
The light source device according to claim 17 , further comprising a fin at an extended portion. The light source device according to any one of claims 1 to 18 , further comprising a translucent member attached so as to close a reflection-side opening of the reflector. The light source device according to any one of claims 1 to 19 ,
A spatial light modulation element that generates modulated light according to an image with light emitted from the light source device;
A projection type image display apparatus comprising: a projection lens that projects the modulated light generated by the spatial light modulation element onto a projection target.

Images