JP2013218101A - Lamp unit having air-blow cooling structure and projection type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a lamp replacement shaft direction to be set freely without being restrained by the connection direction of a duct from a blower fan and an air introduction port to a lamp.SOLUTION: A lamp unit includes: a lamp case 2 which is mounted with a light source lamp 5 and movable in a lamp replacement shaft direction; a fan base 3 which is mounted with a blower fan 11 and displaceable between an air-blowing arrangement in which the blower fan is brought in proximity to the lamp case, and a retreat position in which the blower fan and the lamp case are apart; a fan side duct 12 which is provided at the fan base, introduces air from the blower fan and has an air discharge port 12a on the lamp case side; and a lamp side duct 9 which is provided at the lamp case, has an air introduction port 9a that can be connected to the air discharge port, and guides air toward a light emitting part of the lamp. The connection direction of the air discharge port and the air introduction port is orthogonal to the lamp replacement shaft direction. In the air-blowing arrangement, the air discharge port and the air introduction port are connected, and in the retreat arrangement, the movement of the lamp case in the lamp replacement shaft direction is not hindered.

Description

  The present invention relates to a lamp unit used as a light source of a projection display device such as a projector, and more particularly to a lamp unit having a ventilation cooling structure for a lamp.

  The projection display apparatus uses an image display device such as a DMD (Digital Micromirror Device) or a liquid crystal to modulate light from a light source lamp with a video signal, and enlarges and projects the formed optical image on a screen by a projection lens. It is configured.

  In a discharge lamp normally used as a light source lamp, a discharge gas is enclosed in the lamp, and when a voltage is applied between the electrodes, a discharge arc is generated, emitting strong light and increasing the temperature of the light source lamp. When the temperature of the light source lamp rises excessively, whitening, a decrease in service life, and the like occur. Therefore, a cooling structure for cooling the light source lamp is indispensable for ensuring the quality and reliability of the projection display device.

  A cooling structure of a light source lamp in a conventional projection display apparatus is disclosed in, for example, Patent Document 1. The cooling structure has a lamp unit structure in which a blower fan is connected to a lamp housing in order to effectively cool a light source lamp with a small air volume.

  That is, a translucent plate is disposed on the front surface of the reflector on which the lamp is mounted, and a space between the front peripheral edge of the reflector and the translucent plate is sealed by a housing that forms a lamp holder. The housing is provided with an air inlet for introducing air from the outside of the lamp toward the light emitting unit, and an air outlet for guiding the introduced air to the outside of the lamp. The air inlet is provided at the front peripheral edge of the lamp, and a blower fan is connected through a duct. Air is introduced from the front side of the lamp by the operation of the blower fan, and blown toward the light emitting unit. Thereby, it is possible to cool a light emission part effectively.

JP 2003-5292 A

  Since the light source lamp deteriorates with long-term use, it is necessary to replace the lamp during the lifetime of the projection display device. In order to facilitate the replacement of the lamp, the housing for holding the lamp is moved so that the lamp can be attached and detached.

  Therefore, in the case of the lamp unit having a structure in which the blower fan is connected to the housing as disclosed in Patent Document 1, the connection direction of the connection portion between the duct from the blower fan and the air inlet of the housing is lamp replacement. It is necessary to match the axial direction, that is, the direction in which the housing can be moved when the lamp is replaced.

  As described above, in order to achieve both lamp replacement workability and air cooling performance, the connection direction of the air inlet and the duct is limited. However, the lamp unit should have a higher degree of freedom. It is done. For example, when the lamp replacement axis direction is a horizontal direction and the blower fan is disposed at the upper part of the lamp, the connection direction of the duct from the blower fan and the air inlet to the lamp must be orthogonal to the lamp replacement axis direction.

  Therefore, the present invention can set the lamp replacement axis direction freely without being restricted by the connection direction of the duct from the blower fan and the air inlet to the lamp, and achieve both lamp replacement workability and air cooling performance. An object of the present invention is to provide a lamp unit that can be used.

  It is another object of the present invention to provide a projection type image display apparatus configured using such a lamp unit.

  In order to solve the above-mentioned problems, the lamp unit of the present invention has a lamp fan base forming a housing structure and a lamp holder to which a light source lamp is mounted, and is movable in a lamp replacement axis direction which is a fixed linear direction. As described above, a lamp case supported by the lamp fan base and a blower fan are placed so that a blower arrangement in which the blower fan is brought close to the lamp case and a separated retreat arrangement can be taken. A fan base that is displaceably supported by the lamp fan base, a fan-side duct that is provided on the fan base, guides air from the blower fan, and has an air discharge port on the lamp case side, and the lamp An air inlet provided in the case and connectable to the air outlet, and the air introduced from the air inlet is directed toward the light emitting part of the lamp A lamp-side duct that winds, and when the connection direction of the air discharge port and the air introduction port is orthogonal to the lamp replacement axis direction, and the fan base is in the air blowing arrangement, the air discharge port and the air When the introduction port is connected to communicate between the fan side duct and the lamp side duct and the fan base is in the retracted position, the movement of the lamp case in the lamp replacement axis direction is not hindered. It is characterized by that.

  According to the present invention, the fan base is displaceable between the air blowing arrangement and the retreating arrangement, so that the lamp replacement operation is performed while the connection direction of the air discharge port and the air introduction port is set to be orthogonal to the lamp replacement axis direction. And air cooling performance can both be achieved.

The perspective view which shows the lamp unit in one embodiment of this invention Front view of the lamp unit Top view of the lamp unit from the top Sectional drawing which showed the lamp unit along the AA line in FIG. Partial cross-sectional view seen from the front of the lamp unit Right side view of the lamp unit Schematic plan view showing lamp arrangement in the lamp unit The perspective view which shows the state which has the fan base 3 in the retreat arrangement spaced apart from the lamp case 2 in the same lamp unit. Front view of the lamp unit in the same state Partial sectional view of the lamp unit in the same state as seen from the front Right side view of the lamp unit in the same state

  The lamp unit of the present invention can take the following aspects based on the above configuration.

  That is, the edge portion of the air discharge port and the edge portion of the air introduction port are fitted to each other and have an airtight structure when the fan base is in the air blowing arrangement so as to have an overlap portion. It can be set as the structure to do. Thereby, the airtightness of the whole ventilation path at the time of a connection is ensured, the loss of an air volume can be avoided and sufficient air cooling performance can be ensured.

  In addition, the lamp fan base includes a support shaft portion that rotatably supports the fan base, and the fan base rotates about the support shaft portion, thereby taking the blowing arrangement and the retracting arrangement. When the fan base is in the retracted arrangement, an overlap between the edge of the air discharge port and the edge of the air inlet can be opened. Thus, the fan base can be displaced with a simple configuration.

  The lamp case includes two lamp holders arranged side by side in the lamp exchange axis direction, and the two lamp holders are integrally moved in the lamp exchange axis direction. Can do. The configuration of the present invention is particularly suitable for combining the light emitted from the two lamps into a single light beam. This is because the configuration in which the two lamp holders are arranged in the lamp exchange axis X direction and move as a single unit can be easily adopted when the fan base 3 can be retracted.

  The pair of lamp cases are arranged side by side in a horizontal direction orthogonal to the lamp replacement axis direction, and are arranged so that the emission sides of the lamps mounted on the two lamp holders face each other. It can be set as the structure which has. As a result, the present invention can be applied to a configuration in which the light emitted from the four lamps is combined into one light beam and extracted.

  The projection display device of the present invention includes a light source device, an image display device that spatially modulates light to form an optical image, an illumination optical system that guides light from the light source device to the image display device, A projection optical system for projecting an optical image emitted from the image display device onto a screen, and the light source device may have a configuration using any of the lamp units described above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
1 is a perspective view showing a lamp unit according to an embodiment of the present invention. FIG. 2 is a front view, FIG. 3 is a top view, and FIG. 4 is taken along line AA in FIG. FIG. 5 is a partial cross-sectional view seen from the front, and FIG. 6 is a right side view. This lamp unit is configured by supporting a lamp case 2 and a fan base 3 by a lamp fan base 1 forming a casing and connecting them together.

  The lamp cases 2 are accommodated in a housing structure of the lamp fan base 1 and are provided as a pair. The pair of lamp cases 2 are arranged side by side in the left and right (horizontal direction) when viewed from the surface where the lamp case 2 in FIG. 1 is exposed, that is, from the front in the front view of FIG. As shown in FIG. 2, a lamp base 13 having a substantially rectangular parallelepiped main body whose longitudinal direction is indicated by an arrow X in FIG. 1 is provided at the center of the lamp fan base 1. 13 constitutes a part of the lamp fan base 1.

  The pair of lamp cases 2 are configured to be movable (slidable) in the direction of the lamp replacement shaft indicated by the arrow X in FIG. That is, as shown in FIG. 4 which is a cross-sectional view taken along the line AA of FIG. 3, guide rails 13a extending in the direction of the lamp replacement axis X are provided on both upper and lower ends of the lamp base 13 of the lamp fan base 1. ing. The lamp case 2 is supported by the engagement portion 2a of the lamp case 2 being slidably engaged with the guide rail 13a. Accordingly, the pair of lamp cases 2 are arranged side by side in a direction orthogonal to the lamp replacement axis X direction, and are disposed so as to be retractable in the lamp replacement axis X direction.

  The partial cross-sectional view shown in FIG. 5 corresponds to the left lamp case 2. As shown in FIGS. 2 and 5, the lamp case 2 is provided with the lamp holder 4, and the lamp 5 (FIG. 5) is mounted in the lamp holder 4 with its optical axis oriented in the horizontal direction. FIG. 7 schematically shows a planar arrangement of the pair of lamp case 2, lamp holder 4 and lamp 5 in the housing structure of the lamp fan base 1. Each of the pair of lamp cases 2 is provided with two lamp holders 4. The two lamp holders 4 are arranged in the lamp replacement axis X direction, and move together in the lamp replacement axis X direction as the lamp case 2 moves.

  As schematically shown in FIG. 7, the two lamp holders 4 are arranged so that the emission sides of the mounted lamps 5 are in the same direction and are provided in a pair of lamp cases 2. The lamp holder 4 is arranged so that the emission sides of the mounted lamps 5 face each other. Although not shown, an optical system for synthesizing the emitted light from the lamps 5 attached to the lamp holders 4 is disposed between the pair of lamp cases 2, and the emitted lights from the four lamps 5 are It is synthesized into one light beam and emitted from the lamp unit.

  With the lamp case 2 slid in the lamp replacement axis direction X and pulled out of the lamp fan base 1, the lamp 5 can be attached to and detached from the lamp holder 4. Since the pair of lamp cases 2 can be pulled out separately, the flexibility of lamp replacement work is high. The lamp case 2 is provided with a handle 6 for facilitating the sliding operation.

  As shown in FIG. 5, a lens 8 is arranged on the front surface of the reflector 7 of the lamp 5 (the lens 8 is not shown in FIG. 4). Note that the lamp 5 in FIG. 5 is schematically depicted only by the outer shape of the light emitting portion and the reflector 7. A space between the front peripheral edge of the reflector 7 and the lens 8 is sealed by the lamp holder 4 to form a lamp-side duct 9. The lamp side duct 9 has a function of guiding air from the upper part to the lower part of the front part of the lamp 5, and the upper end part is an air inlet 9 a and the lower part is an exhaust outlet 9 b.

  The fan base 3 is disposed outside the housing structure of the lamp fan base 1 and is disposed on the lamp case 2. The lamp fan base 1 is coupled to the fan base 3 at the support shaft portion 10 (FIG. 6), and the fan base 3 can be rotationally displaced about the support shaft portion 10 (described later). Four blower fans 11 are mounted on the fan base 3 and are displaced in the vertical direction as the fan base 3 is rotationally displaced. The arrangement of the four blower fans 11 corresponds to the arrangement of the four lamp holders 4 housed in the lamp fan base 1. A fan-side duct 12 is provided for each of the blower fans 11. The fan-side duct 12 guides air from the blower fan 11 and has an air discharge port 12a on the lamp case 2 side (FIGS. 2 and 5).

  The air discharge port 12 a of the fan side duct 12 can be connected to and disconnected from the air introduction port 9 a of the lamp side duct 9. FIG. 5 shows a connected state. In this state, the fan side duct 12 and the lamp side duct 9 communicate with each other. Thereby, the air from the blower fan 11 passes through the lamp side duct 9, cools the light emitting part of the lamp 5, and is discharged from the exhaust port 9b. The connection direction between the air discharge port 12a and the air introduction port 9a, that is, the direction in which both the air discharge port 12a and the air introduction port 9a are moved to connect or disconnect each other is a vertical direction perpendicular to the lamp exchange axis X direction. It is set to become.

  The state in which the fan base 3 is rotationally displaced from the state shown in FIGS. 1 to 6 with respect to the lamp fan base 1 is shown in FIGS. 8 to 11 are a perspective view, a front view, a partial cross-sectional view and a right side view, respectively, corresponding to FIGS. 1-2 and 5-6. The state shown in FIGS. 1-6 shows arrangement | positioning (fan arrangement | positioning) in which the fan base 3 exists in the position nearest to the lamp case 2, and the state shown in FIGS. 2 shows an arrangement (retraction arrangement) at a position separated from 2.

  As clearly shown in FIG. 8 or FIG. 11, in the retracted arrangement, the lower surface of the front end portion of the fan base 3 is sufficiently separated from the upper surface 1 a of the lamp fan base 1. On the other hand, in the ventilation arrangement, as clearly shown in FIG. 1 or FIG. 6, the front end portion of the fan base 3 is in close contact with the upper surface of the lamp fan base 1.

  Therefore, in the ventilation arrangement, as shown in FIG. 5, the air discharge port 12 a and the air introduction port 9 a are connected, the fan side duct 12 and the lamp side duct 9 communicate with each other, and the light emitting part of the lamp 5 from the blower fan 11. It will be in the state which can ventilate toward. At this time, an end portion of the air discharge port 12a and an end portion of the air introduction port 9a are fitted to each other to have an overlap portion, thereby forming an airtight structure. Thereby, while having the connection part which can be connected and disconnected, the airtightness of the whole ventilation path is ensured, loss of air volume can be avoided and sufficient air cooling performance can be ensured.

  On the other hand, when in the retracted arrangement, as shown in FIG. 9 or FIG. 10, the connection between the air discharge port 12a and the air introduction port 9a, that is, the fitting is released, and the overlap of the edge portions of both is released. . As a result, a slight gap is generated between the air discharge port 12a and the edge of the air introduction port 9a, and thus the lamp case 2 is not hindered from moving in the lamp replacement axis X direction.

  As described above, according to the lamp unit of the present embodiment, since the fan base 3 can be retracted, the connection direction of the air discharge port 12a and the air introduction port 9a is orthogonal to the lamp replacement axis direction. It is possible. In addition, the duct is reliably connected in the air blowing arrangement, and sufficient air cooling performance can be obtained.

  Thereby, the lamp replacement axis X direction can be set to the horizontal direction, and the workability of the lamp replacement can be improved. In other words, there are cases where other devices are stacked and used on a projector having a built-in lamp unit. In this state, the lamp case 2 can be slid horizontally and pulled out. This is because work can be performed without being restricted by other devices on the projector.

  The above effects are not related to the number of lamps 5. Therefore, in the above-described embodiment, the configuration in which two lamp holders 4 are provided in one lamp case 2 has been described as an example. However, the configuration in which one lamp holder 4 is provided in one lamp case 2 is described. However, the above-described effects can be obtained similarly. Moreover, even if the lamp case 2 is not a pair but a single case, the same effect can be obtained by applying the configuration of the present invention.

  However, the configuration of the present invention is particularly effective for a lamp unit having a configuration in which light emitted from a plurality of lamps is combined into one light beam and extracted.

  For example, the basic configuration of the present invention in the case where light emitted from a plurality of lamps is combined into a single light beam is as follows. The lamp case 2 is provided with two lamp holders 4 and the two lamp holders 4 are integrated. Thus, the lamp moves in the direction of the lamp replacement axis X. Such a configuration can be easily adopted by assuming a configuration in which the fan base 3 can be retracted.

  Further, as in the above-described embodiment, the configuration in which a pair of lamp cases 2 provided with two lamp holders 4 are arranged side by side is combined into a single light beam using four lamps 5 to produce a strong light beam. In this case, the effect of the present invention is more remarkable. This is because it is possible to easily replace the individual lamps 5 by moving the lamp case 2 in the horizontal direction while maintaining sufficient cooling performance for the four lamps 5.

  In the above-described embodiment, as the displacement mode of the fan base 3, the configuration that is switched between the air blowing arrangement and the retreat arrangement by the rotational displacement has been described. However, the displacement aspect is not limited to the rotation but is parallel. It may be moved or other modes.

  The lamp unit of the present invention can achieve both lamp replacement workability and air cooling performance without being restricted by the connection direction of the duct from the blower fan and the air inlet to the lamp. It is useful as a light source for a display device.

DESCRIPTION OF SYMBOLS 1 Lamp fan base 2 Lamp case 3 Fan base 4 Lamp holder 5 Lamp 6 Handle 7 Reflector 8 Lens 9 Lamp side duct 9a Air introduction port 9b Exhaust port 10 Support shaft part 11 Blower fan 12 Fan side duct 12a Air discharge port

Claims (6)

A lamp fan base forming a housing structure;
A lamp case that has a lamp holder to which a light source lamp is mounted, and is supported by the lamp fan base so as to be movable in a lamp replacement axis direction that is a fixed linear direction;
A fan base on which a blower fan is placed and supported so as to be displaceable on the lamp fan base so that a blower arrangement in which the blower fan is brought close to the lamp case, and a retreat arrangement separated from the lamp case;
A fan-side duct that is provided on the fan base, guides air from the blower fan, and has an air discharge port on the lamp case side;
A lamp-side duct provided in the lamp case, having an air introduction port connectable to the air discharge port, and guiding air introduced from the air introduction port toward a light emitting portion of the lamp;
The connection direction of the air outlet and the air inlet is orthogonal to the lamp replacement axis direction,
When the fan base is in the air blowing arrangement, the air discharge port and the air introduction port are connected to communicate between the fan side duct and the lamp side duct,
When the fan base is in the retracted arrangement, the lamp unit is in a state in which movement of the lamp case in the lamp replacement axis direction is not hindered.   The end edge part of the air discharge port and the end edge part of the air introduction port form an airtight structure by fitting each other and having an overlap portion when the fan base is in the air blowing arrangement. Item 2. The lamp unit according to Item 1. The lamp fan base includes a support shaft portion that rotatably supports the fan base,
The fan base is configured to take the blowing arrangement and the retracting arrangement by rotating around the support shaft portion,
The lamp unit according to claim 2, wherein when the fan base is in the retracted arrangement, an overlap between an end edge portion of the air discharge port and an end edge portion of the air introduction port is opened.   Two lamp holders are arranged side by side in the lamp replacement axis direction in the lamp case, and the two lamp holders are integrally moved in the lamp replacement axis direction. Item 2. The lamp unit according to Item 1.   The pair of lamp cases are arranged side by side in a horizontal direction orthogonal to the lamp replacement axis direction, and are arranged so that the emission sides of the lamps mounted on the two lamp holders face each other. The lamp unit according to claim 4. A light source device;
An image display device that spatially modulates light to form an optical image;
An illumination optical system for guiding light from the light source device to the image display device;
A projection optical system that projects an optical image emitted from the image display device onto a screen;
A projection display device, wherein the light source device is configured using the lamp unit according to any one of claims 1 to 5.

Images