JP2005071814A - Concave reflecting mirror, and light source device with concave reflecting mirror - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize dramatic temperature drop of a light emitting spherical part by eliminating heat conduction trouble from the light emitting spherical part to a metallic reflecting mirror. <P>SOLUTION: This high-heat-conductivity concave reflecting mirror A is composed of: a concave reflecting part 1 for reflecting light of a high-pressure discharge lamp 2 frontward; and a mounting part 1a projected rearward from its center back surface; and is characterized by that a discharge lamp mounting hole 5 for slidably inserting a sealing part 3a of the discharge lamp 2 is formed at the center of the mounting part 1a; a heat-conducting contact body 7 contacting the light emitting spherical part 4 of the discharge lamp 2 is formed from the hole edge of the mounting hole 5. Heat of the spherical part 4 is directly transmitted to the side of the reflecting part 1 by presence of the contact body 7 directly contacting the spherical part 4 to exhibit remarkable temperature drop effect of the spherical part 4 in lighting the discharge lamp. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a concave reflector having high thermal conductivity and a light source device with the concave reflector.

  In the recent AV industry, large screens and digital-compatible products are growing for video media. Among them, a lamp-mounted rear projection TV is advantageous in terms of cost and image quality, and is highly expected. This large TV requires a high-efficiency high-pressure discharge lamp as a backlight light source. However, the recent high-pressure discharge lamp has a lighting pressure close to 200 atm and always has a risk of bursting when it is turned on. Therefore, measures to avoid the risk of rupture directly related to the environmental problems described below are desired.

  Secondly, mercury, which is a heavy metal and harmful to the human body, is indispensable for high pressure discharge lamps. Mercury scattering when the high pressure discharge lamp bursts is also a major problem in environmental problems.

  Usually, the concave reflector mounted on the high pressure discharge lamp is made of heat-resistant glass or crystallized glass so that it can withstand the high temperatures during lighting, but the concave reflector, In particular, the temperature in the vicinity of the light emitting sphere, which becomes high, is also very high, and in the concave reflector made of heat-resistant glass, internal distortion gradually occurs and accumulates by repeated turning on and off, and the intensity of the concave reflector decreases accordingly. There is a problem of doing. Further, in the concave reflector made of crystallized glass, crystallization of glass gradually proceeds and brittle fracture tends to occur due to high heat at the time of lighting. This indicates that the concave reflecting mirror may be damaged at the same time due to lamp burst.

  The concave reflecting mirror works to reflect the light from the light emitting sphere at the time of lighting forward and at the same time cooperates with the front glass (in other words, the front opening of the concave reflecting mirror is blocked by the front glass). This also serves to prevent scattering of the filling material to the outside when the lamp is ruptured, and damage to the concave reflecting mirror due to lamp rupture means that the filling material (particularly mercury) cannot be prevented from scattering.

  Furthermore, in order to prevent mercury scattering, it is necessary to completely seal the front opening of the concave reflector with the front glass. However, if it is completely sealed, heat will be trapped inside, resulting in poor heat dissipation and abnormally high temperature inside the concave reflector. It becomes high and causes lamp rupture and embrittlement and breakage of the concave reflector described above, and it has been considered technically impossible with the current technology to completely block the front opening of the concave reflector. If it could be done, there was only a method of increasing the diameter of the light emitting sphere (ellipsoid) of the high-pressure discharge lamp, increasing the distance from the arc generated between the electrodes, and reducing the temperature of the top of the light emitting sphere (ellipsoid). .

  In this case, since the sphere diameter is naturally increased, the light beam reflected by the concave reflecting mirror collides with the light emitting sphere portion and is not emitted forward, so that the outer diameter is lost. At the same time, since the inner volume of the sphere becomes larger, the amount of mercury to be encapsulated also increases, and this goes backwards from the viewpoint of environmental measures.

  When attention is paid to the problem of concave reflecting mirrors using heat-resistant glass or crystallized glass as described above, naturally, metal reflecting mirrors with high heat dissipation are listed as alternative candidates (Patent Document). However, simply changing the concave reflector to a metal material with high thermal conductivity such as aluminum, and using as a main component a silicon nitride with high thermal conductivity as a heat-resistant adhesive that bonds the high pressure discharge lamp to the concave reflector. Even if it is used, it has been experimentally found that the temperature of the air inside the sealed concave reflecting mirror is only slightly reduced, and the effect of the temperature reduction is only a few tens of degrees Celsius. This is thought to be due to the following reasons.

The envelope of the high-pressure discharge lamp is made of quartz glass having a very poor thermal conductivity, and when it is exposed to a high temperature for a long time, it gradually becomes devitrified due to the influence of impurities and other factors. Similarly, the electrode is deformed when it is exposed to a high temperature for a long time and becomes an obstacle to the stable generation of the arc, and all of them cause problems in terms of lamp life. Taking these into consideration, the inventors have determined that it is preferable to keep the surface temperature of the light-emitting sphere during lighting for 950 ° C. or lower in order to maintain good lamp characteristics over a long period of time. However, since the part from the light emitting sphere part where the temperature is to be drastically reduced and the adhesive part of the metal concave reflector is a sealed part of quartz glass with poor thermal conductivity, the heat generated in the light emitting sphere part There is no heat conduction route other than transferring heat to the metal concave reflector through the sealing part. Therefore, even if a metal concave reflector or high heat conductive heat-resistant adhesive is used, the heat conduction performance will jump The improvement was not achieved. As a result, with conventional discharge lamps, particularly those with a rated power consumption of 120 W or more, the front opening of the concave reflecting mirror could not be blocked by the front glass.
JP-A-7-272679

  The first problem of the present invention is to achieve a dramatic temperature decrease of the light emitting sphere by eliminating the poor heat conduction from the light emitting sphere to the metal reflector. The second problem is By solving the first problem as described above, it is possible to adopt a structure in which the front opening of the concave reflecting mirror is entirely obstructed by the front glass even for high wattage (rated power consumption). In other words, the present invention proposes an effective means capable of efficiently reducing the sealing body temperature, particularly the temperature of the light emitting sphere part, with a sealed structure.

  The concave reflecting mirror (A) described in "Claim 1" relates to the basic principle of the present invention. "The concave reflecting portion (1) for reflecting the light of the high-pressure discharge lamp (2) forward and the central rear surface thereof. A concave reflecting mirror (A) having a high thermal conductivity composed of a mounting portion (1a) protruding rearward, and a sealing portion of a high pressure discharge lamp (2) at the center of the mounting portion (1a) The discharge lamp mounting hole (5) into which the (3a) is slidably inserted is formed, and the heat that contacts the light emitting sphere (4) of the high pressure discharge lamp (2) from the hole edge of the discharge lamp mounting hole (5). A conductive contact (7) is formed ".

  Since the heat conduction contact body (7) that directly contacts the light emitting sphere (4) is thus projected from the hole edge of the discharge lamp mounting hole (5), the heat conduction contact body (7) is provided. The heat of the light emitting sphere part (4) is directly transferred to the concave reflecting part (1) side through the light, and the light emitting sphere part (4) has a significant temperature lowering effect during lighting. The contact portion of the heat conducting contact (7) with the light emitting sphere (4) is a portion that hardly contributes to the reflected light at the base of the light emitting sphere (4) on the reflecting surface (6) side. The light emission from the light emitting sphere (4) is not hindered.

“Claim 2” is a specific example of “Claim 1”.
(a) Consists of a concave reflection part (1) that reflects the light of the high-pressure discharge lamp (2) forward, and a mounting part (1a) that protrudes rearward from the center back surface. A highly heat conductive reflector body (a) in which a heat dissipation block housing hole (10) is formed;
(b) Stored in the heat dissipation block storage hole (10) and positioned three-dimensionally in the direction perpendicular to the center line (Z) and the center line (Z) direction of the concave reflecting section (1) A discharge lamp mounting hole (5) into which the sealing portion (3a) of the high pressure discharge lamp (2) is inserted is formed at the center, and the high pressure discharge lamp is formed from the hole edge of the discharge lamp mounting hole (5). A heat dissipating block (B) in which a heat conducting contact (7) made of high heat conduction is in contact with the light emitting sphere (4) of (2), and
(c) The three-dimensional movement of the heat radiating block (B) is enabled, and when the position of the high pressure discharge lamp (2) is adjusted with respect to the concave reflecting portion (1), the heat radiating block (B) is moved to the reflector body ( It is characterized by comprising a highly thermal conductive position adjusting and fixing means (9) for fixing to a).

  In this case, the high-pressure discharge lamp (2) can be three-dimensionally adjusted with respect to the concave reflecting portion (1) via the heat dissipation block (B), and furthermore, a heat conductive contact (7 ), Heat of the light emitting sphere (4) of the high pressure discharge lamp (2) can be effectively transferred to the reflector body (a) by the heat dissipation block (B) and the position adjustment fixing means (9). A significant temperature drop of the light emitting sphere (4) can be realized. In this case, the position of the heat dissipating block (B) is adjusted in the three-dimensional direction and fixed by the position adjusting and fixing means (9) having high thermal conductivity.

“Claim 3” is another embodiment relating to the heat dissipating block (B) of “Claim 2”.
The heat dissipation block (B)
(a) a ring-shaped block body (12) stored in the heat dissipation block storage hole (10);
(b) The light emitting sphere of the high pressure discharge lamp (2) is slidably inserted into the central hole (11) drilled in the block body (12) in the direction of the central axis (Z) of the concave reflecting portion (1). A part of the concave reflecting portion (1) that protrudes toward the reflecting surface (6) side so as to contact the portion (4) is a contact member for heat conduction (7) that is separate from the block body (12). It is configured.

  In this case, the heat dissipating block (B) is composed of the block main body (12) and the heat conducting contact body (7), and the position of the block main body (12) in the X and Y axis directions is adjusted. Then, the position adjustment in the Z-axis direction is performed by the contact member for heat conduction (7). After the position adjustment, the position adjustment fixing means (9) is fixed by “position adjustment and fixing means (9a) in the X and Y axis directions, and fixing means (9b) in the Z axis direction”.

“Claim 4” relates to the light source device (H) using the concave reflecting mirror (A) of “Claim 1”.
(a) a high pressure discharge lamp (2) in which sealing portions (3a) and (3b) are projected from the light emitting sphere (4);
(b) the concave reflecting mirror (A) according to claim 1;
(c) After the position adjustment of the high pressure discharge lamp (2), the fixing member (20) for fixing the sealing portion (3a) to the attachment portion (1a) is provided.

“Claim 5” relates to the light source device (H) using the concave reflecting mirror (A) of “Claim 2”.
(a) a high pressure discharge lamp (2) in which sealing portions (3a) and (3b) are projected from the light emitting sphere (4);
(b) the concave reflecting mirror (A) according to claim 2;
(c) Consists of a fixing member (9b) that fixes the sealing part (3a) to the heat dissipation block (B) and a position adjustment and fixing member (9a) that fixes the heat dissipation block (B) to the mounting part (1a). It is characterized by being.

“Claim 6” relates to the heat dissipation block (B) of the light source device (H) according to “Claim 5”.
The heat dissipation block (B)
(a) a ring-shaped block body (12) stored in the heat dissipation block storage hole (10);
(b) The light emitting sphere (4) of the high-pressure discharge lamp (2) is slidably inserted into the central hole (11) of the block body (12) in the direction of the central axis (Z) of the concave reflecting portion (1). And a heat conducting contact body (7) partially projecting on the reflective surface (6) side of the concave reflective portion (1) so as to come into contact with
(c) After adjusting the position of the high-pressure discharge lamp (2), the contact member for heat conduction (7) is fixed to the block body (12) by the fixing member (9b), and the block body (12) is attached to the mounting portion (1a). It is characterized by being fixed by a position adjusting and fixing member (9a).

  According to the light source device (H) of claims 3 to 6, as described above, the temperature drop of the light emitting sphere (4) due to the heat conducting contact (7) (specifically, prevention of whitening of quartz glass) Other than the high pressure discharge lamp (2) having a rated power consumption of 120 W or more, the front glass on the front surface of the concave reflector (1) can be maintained. Full blockage by (16) becomes possible.

  “Claim 7” is a further embodiment of the light source device (H) according to “Claims 4 to 6”, wherein “the front opening (15) of the concave reflecting mirror (A) is further provided on the front glass (16)”. As described above, in the present invention, since the heat dissipation effect of the light emitting sphere (4) is excellent, the high-pressure discharge lamp (2) with low rated power consumption Of course, the front opening (15) of the concave reflector (A) can be blocked by the front glass (16) even when using a high-pressure discharge lamp (2) with a large rated power consumption. As a result, mercury scattering at the time of lamp explosion can be prevented. Even when the front glass (16) is not provided, a protective glass (not shown) equivalent to the front glass is provided in the storage container (not shown) of the light source device (H) as described later, and the protective glass has a concave surface. By pressing the opening of the reflecting mirror (A), the same state as the closed state by the front glass (16) can be obtained.

From the above, the present invention is effective.
(1) Due to the high heat transfer effect of the contact member for heat conduction, the temperature suppressing effect of the light emitting sphere is excellent.
(2) In the second aspect and below, it is possible to adjust the three-dimensional position of the light emitting sphere with respect to the concave reflecting portion.
(3) Due to the excellent temperature suppression effect on the light emitting sphere, the front opening of the concave reflecting mirror can be completely blocked by the front glass even for a high-voltage discharge lamp with high rated power consumption.
(4) If the concave reflector is made of metal, even if a high-pressure discharge lamp ruptures, the concave reflector itself will not be damaged, so the front glass (or protective glass) will not be damaged. As long as the mercury scattered in the concave reflecting mirror does not scatter outside the concave reflecting mirror, environmental pollution by mercury can be surely prevented.

  The present invention will be described below with reference to the illustrated embodiments. The high pressure discharge lamp (2) used in the present invention is a double-ended type in which sealing portions (3a) and (3b) project from both sides of the light emitting sphere (4), and the light emitting sphere (4) A pair of electrodes (not shown) are arranged opposite to each other, and an arc is formed between the electrodes by a power feeding part (not shown) embedded in the sealing part (3a) (3b). is there. In addition to mercury, the light emitting sphere (4) is filled with necessary filling substances and necessary filling gases. The internal pressure of the light emitting sphere (4) during lighting reaches several tens of atmospheres to several hundreds of atmospheres, and the temperature reaches 1,000 ° C. or more. Here, a double-end type high-pressure discharge lamp (2) is taken as a representative example, but one sealing part protrudes from one end of the light emitting sphere part, and is connected to an electrode arranged opposite to the light emitting sphere part. Of course, it is also possible to apply a single-ended discharge lamp having a portion embedded in the sealing portion.

  FIG. 1 shows a basic type of the present invention. FIG. 2 and subsequent figures are modifications thereof, and generally used structures are shown in FIGS. Hereinafter, the basic type of FIG. 1 will be described. The concave reflecting mirror (A) is composed of a concave reflecting portion (1) and a mounting portion (1a) integrally protruding rearward from the center thereof, and a concave reflecting portion (1a) at the center of the mounting portion (1a) ( A discharge lamp mounting hole (5) is formed in accordance with the central axis (Z) of 1), and a contact member for heat conduction (7) from the hole edge of the discharge lamp mounting hole (5) to the central axis (Z). Is formed.

  When the heat conducting contact body (7) is integrally formed of the same metal, the concave reflecting mirror (A) is formed of a high heat conductive metal such as copper or brass because of the melting point. In FIG. 1, the heat conducting contact body (7) is formed integrally with the concave reflecting portion (1), but it is formed separately and is pressed into the concave reflecting portion (1). It may be integrated in the form (not shown). In that case, the portion from the concave reflecting portion (1) to the mounting portion (1a) is made of a highly reflective and lightweight metal such as aluminum, and the heat conduction contact (7) is made of high heat such as copper or brass. It will be formed of a conductive metal.

  The contact member for heat conduction (7) comes into contact with the base portion (4a) on the reflective surface (6) side of the light emitting sphere portion (4) (of course, it is preferable to be in contact). The contact end portion (7a) may be in contact with the base portion (4a) on the reflective surface (6) side of the light emitting sphere portion (4), and does not necessarily have to be formed in a spherical shape, but the contact area In order to increase the size, it is preferable to form a spherical shape in accordance with the spherical surface of the light emitting sphere (4).

  Further, as described above, the contact member (7a) for heat conduction only needs to be in contact with the base part (4a) on the reflective surface (6) side of the light emitting sphere part (4). The shape is not particularly limited (e.g., a simple rod-like shape), but in order to increase the contact area (in other words, heat transfer surface area) by contacting the entire base portion (4a), in this embodiment, it is cylindrical. Is formed. Further, the contact member for heat conduction (7) may be any member as long as the contact end (7a) contacts the base (4a) on the reflective surface (6) side of the light emitting sphere (4) as described above. It is not always necessary to project from the reflecting surface (6) side of the concave reflecting portion (1). In the present embodiment, the case where the projection is provided is a representative example. Further, the projecting position is not limited to the hole edge of the discharge lamp mounting hole (5), but in this embodiment, it protrudes from the hole edge of the discharge lamp mounting hole (5) so as not to impair the reflection efficiency. It is installed.

  In the high pressure discharge lamp (2), one sealing part (3a) is inserted into the discharge lamp mounting hole (5) of the concave reflecting mirror (A), and the insertion end of the sealing part (3a) is the mounting part (1a ) Is fixed to the outer surface by a thermally conductive inorganic adhesive (20). The heat conductive inorganic adhesive (20) is, for example, a mixture of an aggregate such as silicon nitride (80%) having high heat conductivity and silica or alumina or other binder (20%). The contact end (7a) of the heat conducting contact (7) of the concave reflecting mirror (A) is in contact with the base (4a) on the reflecting surface (6) side of the light emitting sphere (4).

  In this way, the power feeding part (17) and the other power feeding part (18) led out from one sealing part (3a) of the high-pressure discharge lamp (2) attached to the concave reflecting mirror (A) are respectively connected to the lead wires. (22) (23) are connected. (21) is an insulating cover provided at the rear end of the mounting portion (1a). The conducting wire (23) is led out through a through hole (24) formed in the concave reflecting portion (1).

  Thus, when the high pressure discharge lamp (1) is turned on, an arc is generated between the electrodes, and the temperature of the light emitting sphere (4) rises rapidly. The heat of the light emitting sphere part (4) is radiated by the convection of the air in the concave reflecting mirror (A), or the heat radiated by radiation, or the heat conduction to the concave reflecting mirror (A) by heat conduction to the light emitting sphere part (4). Your heat will be taken away. The former two cases are the same in the case of the present invention as in the conventional example, but the last heat transfer case is different from the present invention. That is, in the conventional example, the heat of the light emitting sphere is transmitted to the mounting portion of the concave reflecting mirror through the quartz sealing portion having poor thermal conductivity, but since the sealing portion is quartz, The movement is very small. Therefore, even if a metal is used for the concave reflecting mirror, the temperature of the light emitting sphere exceeds 1,000 ° C.

  On the other hand, in the case of the present invention, the heat conducting contact (7) is directly in contact with the light emitting sphere (4) and the heat of the light emitting sphere (4) is directly attached to the concave reflecting mirror (A) ( Move to 1a). The concave reflector (A) is made of a material with excellent heat dissipation, such as aluminum, copper, brass, etc., so the heat taken from the light emitting sphere (4) can be quickly removed from the concave reflector (A). As a result, the temperature of the light emitting sphere (4) can be reduced to 1,000 ° C. or lower (more precisely, 950 ° C. or lower). Note that the contact width (L) of the heat conducting contact body (7) to the base part (4a) of the light emitting sphere part (4) is preferably at least 0.1 mm or more in order to ensure thermal conductivity, In order to contact the entire base part (4a) of the light emitting sphere part (4), a cylindrical shape is preferable.

  FIG. 2 shows a second embodiment in which the concave reflecting mirror (A) is composed of a reflecting mirror main body (a) and a heat radiating block (B). ) Is formed. A discharge lamp mounting hole (5) is formed at the center of the heat dissipation block (B), for heat conduction from the hole edge of the discharge lamp mounting hole (5) to the reflective surface (6) side of the concave reflecting portion (1). A contact body (7) is projected. The reflector body (a) and the heat dissipation block (B) are both made of a highly heat conductive material, the reflector body (a) is made of, for example, aluminum, and the heat dissipation block (B) is made of copper or brass. . The heat dissipation block housing hole (10) is larger than the heat dissipation block (B), and the heat dissipation block (B) can move in the three-dimensional direction. The wall surface (10a) around the heat radiating block housing hole (10) is screwed with a screw serving as a position adjusting / fixing means (9a) in the XY axis direction from four directions. Others are the same as the first embodiment.

  As in the first embodiment, one sealing part (3a) of the high pressure discharge lamp (2) is inserted into the discharge lamp mounting hole (5) of the heat dissipation block (B), and the light emitting sphere part (4) is used for heat conduction. The contact body (7) is brought into contact, and both are fixed, for example, with a high thermal conductive inorganic adhesive (9b). Subsequently, the high pressure discharge lamp (2) is inserted from the back of the reflecting mirror body (a), and the heat dissipation block (B) is stored in the heat dissipation block storage hole (10). After that, the heat radiating block (B) is moved in a three-dimensional direction so that the light emission center of the light emitting sphere (4) coincides with the focal point of the reflector body (a), and the position adjusting and fixing means is positioned. Tighten the screws (9a) to fix the heat dissipation block (B) to the reflector body (a). If necessary, the heat-dissipating block (B) and the wall surface (10a) around the heat-dissipating block housing hole (10) are fixed by a high thermal conductive inorganic adhesive (30), silver brazing, or other fixing means. As in the first embodiment, the heat of the light emitting sphere (4) is transmitted to the heat radiating block (B) and the reflecting mirror body (a) through the heat conducting contact body (7) to effectively radiate heat. Is done.

  3 and 4, the heat dissipating block (B) is composed of a ring-shaped block main body (12) and a separate heat conducting contact body (7), for example, and the heat conducting contact body (7 ) Is slidably inserted into a center hole (11) drilled in the center of the block body (12). As described above, both the block main body (12) and the heat conducting contact body (7) are formed of a high heat conductive metal such as copper or brass.

  The mounting method of the high pressure discharge lamp (2) is almost the same as that of the second embodiment. One sealing part (3a) of the high pressure discharge lamp (2) is inserted into the contact body for heat conduction (7) and is used for heat conduction. The contact end (7a) of the contact body (7) is brought into contact with the light emitting sphere (4). Then, the contact member for heat conduction (7) is inserted into the center hole (11) of the block main body (12) (or in a state of being inserted in advance), and in this state, the high pressure discharge lamp (2) is connected to the reflecting mirror. Insert from the back of the main body (a) and store the heat dissipation block (B) in the heat dissipation block storage hole (10).

  In this state, the heat conduction contact (7) is slid relative to the block body (12) to adjust the position in the Z-axis direction, and the block body (12) is moved in the XY direction to adjust the XY position. Do. When the position adjustment in the three-axis directions is finished, the block main body (12) is fixed to the reflecting mirror main body (a) by screwing in screws as position adjusting and fixing means (9a) as described above. After the block main body (12) is fixed with screws, the heat conductive contact body (7) is fixed to the block main body (12) by a high heat conductive inorganic adhesive (9b), silver brazing or other fixing means. As in the first embodiment, the heat of the light emitting sphere (4) is transmitted to the heat radiating block (B) and the reflecting mirror body (a) through the heat conducting contact body (7) to effectively radiate heat. Is done. The three-axis adjustment need not be performed at the same time, and the Z-axis adjustment may be performed after the XY-axis adjustment or vice versa.

  FIGS. 5 and 6 show that after the adjustments made in FIGS. 3 and 4, the block body (12) and the contact member for heat conduction (7), and the block body (12) and the rear end of the mounting portion (1a) are subjected to high heat conduction. Adhering with a conductive inorganic adhesive or silver brazing, the heat conduction contact body (7), the block body (12) and the reflecting body (a) are thermally integrated into a single structure, and the light emitting sphere ( The heat from 4) is transmitted smoothly, and the heat is radiated more smoothly by the reflector main body (a).

  FIGS. 7 and 8 show another embodiment. For example, the heat conductive contact body (7) is fixed to the block body (12) by a Z-axis fixing means (9b) such as a screw. In addition, the block body (12) is fixed to the mounting portion (1a) of the reflecting mirror body (a) after the position adjustment by the XY direction position adjusting means (9a) is finished, and then fixed by the fixing screw (9c). It will be. The method of position adjustment is the same as in FIGS.

  In the light source device (H) of the present invention, the front opening (15) of the concave reflecting mirror (A) is closed by the front glass (16). When the front opening (15) of the concave reflecting mirror (A) is not blocked by the front glass (16), the front glass (not shown) of the storage container (not shown) for storing the light source device (H) Will close and close to the front opening (15).

  The following table shows experimental results for verifying the heat transfer effect of the contact member for heat conduction according to the present invention.

[Experimental conditions]
(1) For the adhesive, 80% of silicon nitride having excellent thermal conductivity was used, and the remainder was silica or a mixture of alumina and binder.
(2) The rated power consumption of the high-pressure discharge lamp used was 150 W (outer diameter: 10 mm), and it was lit by supplying 150 W of power.
(3) The temperature spec of the light emitting sphere is 950 ° C. or less (6 to 9 satisfies the spec).
(4) The contact member for heat conduction and the heat dissipation block used were copper, the concave reflecting mirror was made of aluminum, and the concave reflecting surface was coated with a multilayer film, so that the reflectance of visible light was 95% or more.

  In the above table, the “contact dimension (L) with respect to the light emitting sphere part” is the overlap amount (L) between the contact end of the heat conducting contact body and the base of the light emitting sphere part as shown in FIG. . Therefore, “−0.5” indicates that the distance is 0.5 mm, “0” does not overlap, and the contact end of the contact member for heat conduction coincides with the base of the light emitting sphere. “0.1”, “0.5”, “1” and “1.5” indicate that the overlap amount (L) is “0.1 mm”, “0.5 mm”, “1 mm” and “1.5 mm”, respectively. It shows that there is. The contact end, which is the overlapping portion of “0.5”, “1”, and “1.5”, is formed in accordance with the spherical surface of the light emitting sphere portion so as to be in contact with the base portion of the light emitting sphere portion. “0.1” is a state where they are slightly overlapped, and most of the contact ends are close to the base of the light emitting sphere.

  In the above table, Sample No. 1 was a conventional example and had poor heat transfer efficiency, and the temperature of the light emitting sphere reached 1,070 ° C. Sample No. 2 has a contact member for heat conduction, but since there is no heat dissipation block and no overlap, it is difficult to transfer heat from the light emitting sphere to the contact end, which is almost the same as the conventional example at 1,050 ° C. showed that. In this case, a highly heat-conductive inorganic adhesive is used for bonding the concave reflecting mirror and the sealing portion of the high-pressure discharge lamp, but bubbles are generated in the adhesive due to heat drying. The thermal conductivity of could not be achieved. Sample Nos. 3, 4, and 5 have increased overlap amounts of 0.5 mm, 1 mm, and 1.5 mm, respectively, but the heat-dried portion of the highly thermally conductive inorganic adhesive becomes an obstacle to heat conduction, There was no significant temperature drop at 1,030 ° C. or 1,025 ° C. Further, even when the heat dissipation block (B) was used as in Sample No. 5 ′, the temperature drop was not sufficient if the gap was only 0.5 mm.

  Although not shown in the table, when the high thermal conductive inorganic adhesives of sample numbers 3, 4, and 5 are naturally dried, the density of the adhesive is improved as compared with the case of heat drying, which is higher than that of sample number 6. Showed a lower temperature than sample number 5.

  Sample No. 6 ′ has an overlap amount of “0.1 mm”, but most of the contact end (7a) of the heat conducting contact (7) is close to the base (4a) of the light emitting sphere (4). Therefore, the heat of the light emitting sphere (4) moves to some extent to the heat conducting contact (7). The heat dissipating block (B) and the heat conducting contact body (7) are in contact with each other almost all around and the heat dissipating block (B) and the mounting portion (1a) are fixed by screws (9a). The heat that has moved to the conductive contact (7) flows smoothly into the reflector body (a) and is dissipated to the surroundings. As a result, the temperature of the light emitting sphere (4) was reduced to 945 ° C., which is close to the upper limit of the temperature specification.

  Sample Nos. 7, 8, and 9 have the same overlap amounts as those of Sample No. 6, but with an overlap amount of “0.5 mm”, “1 mm”, and “1.5 mm”, respectively. A large temperature drop of 880 ° C. was observed. As a result, the front opening of the concave reflecting mirror can be blocked by the front glass even for a high-pressure discharge lamp with a large rated power consumption of 150 W.

  In the present invention, the heat conduction efficiency is improved by “contact”. However, the overlap amount is “0”, and the contact end (7a) is sufficiently close to the base (4a) of the light emitting sphere (4). The facing surface of the contact end (7a) is sufficiently large, the heat radiated from the base (4a) is immediately absorbed by the contact end (7a), and the temperature of the light emitting sphere (4) is 950 ° C. or less. (Sample number 6) is also included in the concept of “contact” of the present invention.

  In the present invention, the heat conduction contact (7) can efficiently move the heat of the light emitting sphere (4) to the concave reflecting mirror (A) side to dissipate the heat to the outside, which is impossible in the past. The high-pressure discharge lamp (2) with a particularly high power consumption was able to block the entire front surface of the metal concave reflector (A), thus preventing environmental pollution when the lamp burst. It was.

Sectional view of the basic mold of the present invention (first embodiment) Sectional view of the second embodiment of the present invention Sectional view of the third embodiment of the present invention The figure seen from the back direction of FIG. Sectional drawing of 4th Example of this invention The figure seen from the back direction of FIG. Sectional drawing of 5th Example of this invention The figure seen from the back direction of FIG. Enlarged view of the contact portion between the contact end of the contact member for heat conduction and the base of the light emitting sphere

Explanation of symbols

(A) Concave reflector
(1) Concave reflector
(1a) Mounting part
(2) High pressure discharge lamp
(3a) Sealing part
(4) Luminescent sphere
(5) Discharge lamp mounting hole
(7) Contact for heat conduction

Claims (7)

A concave reflector having a high thermal conductivity, comprising a concave reflecting portion that reflects light of a high-pressure discharge lamp forward, and a mounting portion that protrudes rearward from the central back surface, and is provided at the center of the mounting portion. A discharge lamp mounting hole is formed in which the sealing part of the high pressure discharge lamp is slidably inserted, and a contact member for heat conduction is formed to contact the light emitting sphere part of the high pressure discharge lamp from the hole edge of the discharge lamp mounting hole. A concave reflecting mirror characterized in that (a) High thermal conductivity, consisting of a concave reflecting part that reflects the light of the high-pressure discharge lamp forward, and a mounting part that protrudes rearward from the center rear surface, and a heat dissipation block housing hole is formed in the mounting part The reflector body,
(b) Stored in the heat dissipation block storage hole, and can be adjusted three-dimensionally in the direction perpendicular to the center line of the concave reflecting part and in the direction of the center line, and the sealing part of the high pressure discharge lamp is inserted in the center. A discharge block mounting hole is formed, and a heat dissipation block in which a heat conductive contact body with high thermal conductivity protrudes from a hole edge of the discharge lamp mounting hole and contacts a light emitting sphere part of the high pressure discharge lamp;
(c) A highly heat-conductive position adjustment fixing means that enables the three-dimensional movement of the heat dissipation block and fixes the heat dissipation block to the reflector body when the position of the high pressure discharge lamp is adjusted with respect to the concave reflecting portion. Concave reflector characterized by comprising. The heat dissipation block
(a) a ring-shaped block main body stored in the heat dissipation block storage hole;
(b) It is slidably inserted into the central hole drilled in the block body in the direction of the central axis of the concave reflecting portion, and is arranged on the reflecting surface side of the concave reflecting portion so as to contact the light emitting sphere of the high pressure discharge lamp. A concave reflecting mirror characterized in that the concave reflecting mirror is constituted by a contact member for heat conduction that is separate from the block main body and is partially protruded. (a) a high pressure discharge lamp having a sealing portion protruding from the light emitting sphere, and
(b) the concave reflecting mirror according to claim 1;
(c) A light source device comprising a fixing member for fixing the sealing portion to the mounting portion after the position of the high-pressure discharge lamp is adjusted. (a) a high pressure discharge lamp having a sealing portion protruding from the light emitting sphere, and
(b) the concave reflecting mirror according to claim 2;
(c) A light source device comprising: a fixing member that fixes the sealing portion to the heat dissipation block; and a fixing member that fixes the heat dissipation block to the attachment portion. The heat dissipation block
(a) a ring-shaped block main body stored in the heat dissipation block storage hole;
(b) It is slidably inserted into the central hole of the block main body in the direction of the central axis of the concave reflecting portion, and a part of the concave reflecting portion protrudes toward the reflecting surface side so as to come into contact with the light emitting sphere of the high pressure discharge lamp. With a heat conductive contact body,
(c) After adjusting the position of the high-pressure discharge lamp, the contact member for heat conduction is fixed to the block body with a fixing member, and the block body is fixed to the mounting portion with the fixing member. Light source device. The light source device according to claim 4, wherein the front opening of the concave reflecting mirror is further closed by a front glass.

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