JP2005077621A - Projector device and lamp unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp unit capable of easily and surely adjusting the position of an optical axis by a simple mechanism, and a projector device equipped with the lamp unit. <P>SOLUTION: The lamp unit (2) used for the projector device has a lamp assembly equipped with a light source lamp (14), a holder member (18) supporting the lamp assembly so as to displace parallel in a prescribed axial direction, a base member (20) supporting the holder member so as to turn centering a prescribed axial line, parallel position adjusting means (32 and 40) constituted to adjust the position of the lamp assembly in the prescribed axial direction from an opposite side to the holder member supporting surface of the base member, and a turning position adjusting means (18i) constituted to adjust the turning position of the lamp assembly centering the prescribed axial line from the opposite side to the holder member supporting surface of the base member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projector device and a lamp unit used therefor, and more particularly, to a lamp unit capable of easily and reliably adjusting an optical axis position with a simple mechanism, and a projector using the same.

  Japanese Patent Laid-Open No. 2001-330889 (Patent Document 1) describes a projection display device. In the projection display device as the projector device, the light source lamp is supported so as to abut on the three convex portions arranged on the circumference, and the arc-shaped wall surface of the light source lamp is formed in a V shape. The light source lamp is positioned with respect to the lamp holder by supporting it so as to be pressed against the lamp holder.

  On the other hand, Japanese Unexamined Patent Application Publication No. 2003-21867 (Patent Document 2) describes a projector device with a lamp mounting angle adjustment mechanism. In this projector apparatus, the light source lamp is supported so as to be rotatable about a vertical axis and a horizontal axis. In this projector device, when adjusting the vertical angle of the light source lamp, the screwing amount of the angle adjusting screw is changed, and when adjusting the horizontal angle, the angle adjusting screw is arcuate. It is moved along the long hole.

JP 2001-330889 A JP 2003-21867 A

  However, in the projector device described in Patent Document 1, since there is no means for adjusting the position of the optical axis of the light source lamp, if there is an error in the size or shape of any member for positioning the light source lamp, There is a problem that the optical axis cannot be set to an appropriate position.

  In addition, although the projector apparatus described in Patent Document 2 can adjust the optical axis, there is a problem that the optical axis adjustment mechanism is complicated. Further, in this projector device, the angle of the light source lamp can be adjusted, but there is also a problem that there is no means for fixing the light source lamp at the adjusted position of the light source lamp.

  Accordingly, an object of the present invention is to provide a lamp unit capable of easily and reliably adjusting the optical axis position with a simple mechanism, and a projector apparatus including the lamp unit.

  In order to achieve the above object, the present invention provides a lamp unit for use in a projector apparatus, which includes a lamp assembly including a light source lamp, and supports the lamp assembly so as to be movable in a predetermined axial direction. A holder member, a base member that supports the holder member on a holder member support surface so as to be rotatable about a predetermined axis, and a position of the lamp assembly in the direction of the predetermined axis, the holder member support surface of the base member The parallel position adjusting means configured to be adjustable from the opposite side of the lamp member, and the rotational position around the predetermined axis of the lamp assembly may be adjusted from the opposite side of the holder member supporting surface of the base member. And a rotational position adjusting means configured to be able to perform.

In the present invention configured as described above, the lamp assembly is supported by the holder member so as to be movable in parallel. The holder member is supported so as to be rotatable about a predetermined axis with respect to the base member. A predetermined axis along which the holder member rotates coincides with the direction in which the lamp assembly moves in parallel. The position of the lamp assembly can be adjusted by the parallel position adjusting means from the opposite side of the surface on which the base member supports the holder member. Further, the rotation position of the holder member can be adjusted from the opposite side of the holder member support surface by the rotation position adjusting means.
According to the present invention configured as described above, the optical axis position of the light source lamp can be adjusted with a simple mechanism. Moreover, according to this invention comprised in this way, both a parallel position and a rotation position can be adjusted from the opposite side of a holder member support surface.

In the present invention, preferably, the rotation position adjusting means is an adjustment protrusion that extends from the holder member to the opposite side of the holder member support surface through the base member.
In this invention comprised in this way, the rotation position of a holder member can be adjusted by operating an adjustment protrusion from the opposite side of a holder member support surface.

In the present invention, preferably, the parallel position adjusting means includes a biasing spring that biases the lamp assembly in the direction of a predetermined axis, and an adjustment screw that presses the lamp assembly in the direction of the predetermined axis.
In the present invention configured as described above, when the adjustment screw is tightened, the lamp assembly moves parallel to the direction in which the adjustment screw advances against the urging by the urging spring, and when the adjustment screw is loosened, the lamp assembly is moved. Moves in the direction biased by the biasing spring.

In the present invention, it is preferable to further include a front glass for protecting the lamp of the lamp assembly, and the front glass is sandwiched and held between the holder member and the lamp assembly.
In the present invention configured as described above, the front glass can be held without using any special fixing means such as an adhesive, so that the assembly efficiency of the lamp unit can be improved.

  Further, the projector device of the present invention includes a lamp unit that emits light from a light source, a modulation optical system that modulates light emitted from the lamp unit, and a projection lens that projects light modulated by the modulation optical system onto a screen. The lamp unit includes a light source lamp, a holder member that supports the lamp assembly so as to be movable in a predetermined axial direction, and the holder member that rotates about the predetermined axis. A base member that is movably supported on the holder member supporting surface, and a parallel position that is configured so that the position of the lamp assembly in a predetermined axial direction can be adjusted from the opposite side of the holder member supporting surface of the base member. The position adjustment means and the rotation position of the lamp assembly about the predetermined axis are adjusted from the opposite side of the holder member support surface of the base member. It is characterized by having a pivot position adjusting means being configured to allow.

  According to the lamp unit of the present invention and the projector apparatus including the lamp unit, the optical axis position can be easily and reliably adjusted with a simple mechanism.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view showing the entire projector apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a lamp unit used in the projector apparatus according to the embodiment of the present invention. FIG. 3 is a perspective view showing a state in which the lamp unit is assembled.

As shown in FIG. 1, a projector apparatus 1 according to an embodiment of the present invention includes a housing 1a, a lamp unit 2, and three dichroic mirrors 4a that are light guide optical systems that guide light emitted from the lamp unit. 4b, 4c and two mirrors 6a, 6b, three liquid crystal plates 8a, 8b, 8c which are modulation optical systems for modulating light guided by the light guide optical system, and modulated by this modulation optical system It has a dichroic prism 10 that is a combining optical system that combines light, and a projection lens 12 that projects the light combined by the dichroic prism 10 onto a screen.
The lamp unit 2 is configured to emit light serving as a light source of the projector device. Details thereof will be described later.

The dichroic mirror 4a is configured and arranged to reflect the red component of the light emitted from the lamp unit 2 and direct it toward the mirror 6a to transmit the other color components of the light. The dichroic mirror 4b is configured and arranged so as to reflect the green component of the light transmitted by the dichroic mirror 4a, direct it toward the liquid crystal plate 8b, and transmit other color components of the light. The dichroic mirror 4c is configured and arranged to reflect the blue component, which is the component of the light transmitted by the dichroic mirror 4b, and direct it toward the mirror 6b.
The mirror 6a is disposed so as to reflect the red component of the light reflected by the dichroic mirror 4a and direct it to the liquid crystal plate 8a. The mirror 6b is disposed so as to reflect the blue component of the light reflected by the dichroic mirror 4c and direct it to the liquid crystal plate 8c.

The liquid crystal plate 8 a is configured and arranged so as to modulate the red light reflected by the mirror 6 a so as to enter the dichroic prism 10. The liquid crystal plate 8b is configured and arranged to modulate the green light reflected by the dichroic mirror 4b and to make it incident on the dichroic prism 10. The liquid crystal plate 8c is configured and arranged to modulate the blue light reflected by the mirror 6b so as to enter the dichroic prism 10.
The dichroic prism 10 reflects the red light modulated by the liquid crystal plate 8a and directs it toward the projection lens 12. The dichroic prism 10 transmits the green light modulated by the liquid crystal plate 8b and directs it toward the projection lens 12. The blue light modulated by the plate 8c is reflected and directed toward the projection lens 12, and is arranged.

The projection lens 12 is configured and arranged to project the light reflected or transmitted by the dichroic prism 10 onto a screen (not shown).
Next, the configuration of the lamp unit 2 will be described. As shown in FIGS. 2 and 3, the lamp unit 2 includes a light source lamp 14, a lamp case 16 attached to the front surface of the light source lamp 14, a holder member 18 that supports the lamp case 16 in a movable manner, And a base member 20 that rotatably supports the holder member 18.
In the present embodiment, a high-pressure mercury lamp is used as the light source lamp 14 that emits light serving as the light source of the projector device 1.

  The lamp case 16 has a rear half 16 a that receives the light source lamp 14 and a front half 16 b that is supported by the holder member 18. The rear half 16a of the lamp case 16 has a generally square plate shape as a whole, and a circular hole through which light from the light source lamp 14 passes is provided at the center. In addition, a concave portion (not shown) that receives the frame of the light source lamp 14 without backlash is formed on the back side of the rear half portion 16a. The light source lamp 14 is received in a recess (not shown) on the back side of the rear half portion 16 a and is fixed to the rear half portion 16 a of the lamp case 16 by two presser fittings 26 and two fixing screws 24. Thereby, the light source lamp 14 is positioned and fixed with respect to the lamp case 16. The light source lamp 14 attached to the lamp case 16 constitutes a lamp assembly. The front half 16b of the lamp case 16 has a generally square plate shape as a whole, and is provided with a circular hole through which light from the light source lamp 14 passes. Moreover, the hole 16c for ensuring air permeability is comprised in the center part of each square side of the front half part 16b. Furthermore, two projections 16d are provided on each of the two side surfaces of the front half portion 16b so that the lamp case 16 is supported by the holder member 18 so as to be movable in parallel (only two on one side are shown).

  The holder member 18 has a plate shape bent into a U-shape as a whole, and is dimensioned so that the front half portion 16b of the lamp case 16 can be received without play between the parallel surfaces facing each other. Two guide long holes 18 a for receiving protrusions 16 d provided on the side surface of the front half 16 b of the lamp case 16 are formed on the parallel surface of the holder member 18. These guide elongated holes 18a receive the four protrusions 16d, whereby the lamp case 16 is guided so as to move in parallel with the holder member 18. Further, the screws 36 are screwed into the female screw holes 16e respectively provided on the side surfaces of the front half portion 16b through the holes 18c provided on the parallel surfaces of the holder member 18 to fix the lamp case 16 to the holder member 18. . However, the screw 36 is tightened to an extent that allows the lamp case 16 to move in parallel. In addition, a large number of small holes 18 b for releasing heat from the light source lamp 14 are formed in the vicinity of the center of the parallel surface of the holder member 18. Further, clamp portions 18g extend inward from the vicinity of the center of each parallel surface of the holder member 18, respectively. A circular front glass 22 that transmits light from the light source lamp 14 is sandwiched and fixed between the clamp portion 18g and the lamp case 16. Further, the tips of the parallel surfaces of the holder member 18 are bent 90 ° inward. In addition, a substantially circular large-diameter hole 18d is formed in the center surface between the two parallel surfaces of the holder member 18, and a rectangular tongue 18e projects toward the inside of the hole 18d.

  The base member 20 has a substantially rectangular plate shape, and has a holder member support surface 20a that rotatably supports the holder member 18, and a surface on the back side thereof. On the holder member support surface 20 a of the base member 20, a substantially circular circular raised portion 20 b that can be received without play in the large-diameter hole 18 d formed in the holder member 18 is formed. Further, the circular raised portion 20b is cut out in a rectangular shape by a concave portion 20c projecting from the holder member support surface 20a to the surface on the back side, and the cutout portion receives the tongue portion 18e of the holder member 18. Thus, the holder member 18 is supported on the holder member support surface 20a of the base member 20 so as to be rotatable about the central axis of the circular raised portion 20b. The large-diameter hole 18d of the holder member 18 and the circular raised portion 20b of the base member 20 constitute a rotation position adjusting means. Further, since the tongue portion 18e of the holder member 18 is received in the cutout portion of the circular raised portion 20b, the rotatable range of the holder member 18 is limited to a predetermined angle. Further, the two screws 42 are screwed into the female screw holes 18 f formed on both sides of the large diameter hole 18 d of the holder member 18 through the two long holes 20 d formed in the base member 20, respectively. Is fixed to the base member 20. Further, an adjustment long hole 20f is formed on the back side of the circular raised portion 20b. The adjustment long hole 20f protrudes from the back side of the large-diameter hole 18d of the holder member 18 toward the base member 20. An adjustment protrusion 18i which is a rotation position adjusting means is passed. Further, a connector support portion 20 e is provided on the holder member support surface 20 a of the base member 20. In addition, an electric wire connector 28 for supplying electric power to the light source lamp 14 is attached to the connector support portion 20 e by two screws 30. Further, a handle 38 for attaching the lamp unit 2 from the housing of the projector device 1 is attached to the back surface of the base member 20.

  Next, a mechanism for adjusting the optical axis of the lamp unit 2 will be described. A plate spring 32, which is an urging spring, is attached to the side surface of the front portion 16 b of the lamp case 16 that is located on the opposite side of the base member 20 by two screws 34. A large number of small holes 32 a for ensuring air permeability are provided at the center of the leaf spring 32, and both sides thereof are fixed to the lamp case 16 by screws 34. Further, both end portions of the leaf spring 32 are bent in directions away from the lamp case 16, and both end portions are engaged with the tip of the holder member 18 bent by 90 °. Due to the elastic recovery force of the leaf spring 32, the lamp case 16 is urged downward in FIG. Further, female screw holes 18h are formed on both sides of the large-diameter hole 18d of the holder member 18, and adjustment screws 40 are respectively screwed into the female screw holes 18h. Further, since the positions of the two female screw holes 18h are respectively aligned with the two holes 20g of the base member 20, the adjustment screw 40 can be adjusted from the back side of the holder member support surface 20a through the holes 20g. . When the adjustment screw 40 is tightened, the tip of the adjustment screw 40 pushes the front half 16b of the lamp case 16, and the lamp case 16 is moved upward in FIG. When the adjustment screw 40 is loosened, the lamp case 16 is moved downward by the urging of the leaf spring 32. Thereby, the position with respect to the holder member 18 of the lamp case 16 can be adjusted. The leaf spring 32 and the adjusting screw 40 constitute a parallel position adjusting unit.

  Next, the operation of the projector device 1 according to the embodiment of the invention will be described. First, the light emitted from the light source lamp 14 of the lamp unit 2 enters the dichroic mirror 4a. The dichroic mirror 4a reflects the red component of the light emitted from the light source lamp 14 toward the mirror 6a. The red light incident on the mirror 6a is reflected and incident on the liquid crystal plate 8a. The liquid crystal plate 8 a modulates the incident red light into a red component image of an image to be displayed by the projector device 1 and transmits the modulated red light to the dichroic prism 10. The red light incident on the dichroic prism 10 is deflected by 90 ° and projected onto a screen (not shown) by the projection lens 12. On the other hand, light other than the red component transmitted by the dichroic mirror 4a enters the dichroic mirror 4b. The green component of the light incident on the dichroic mirror 4b is reflected toward the liquid crystal plate 8b by the dichroic mirror 4b. The liquid crystal plate 8b modulates the incident green light into a green component image and transmits the modulated green light to the dichroic prism 10. The green light incident on the dichroic prism 10 is transmitted as it is and projected onto a screen (not shown) by the projection lens 12. Further, the blue light that is a component of light other than red and green and transmitted through the dichroic mirror 4b is reflected by the dichroic mirror 4c toward the mirror 6b. The blue light incident on the mirror 6b is reflected toward the liquid crystal plate 8c. The liquid crystal plate 8 c modulates the incident blue light into a blue component image and transmits the modulated blue light to the dichroic prism 10. The blue light incident on the dichroic prism 10 is deflected by 90 ° and projected onto a screen (not shown) by the projection lens 12. Images of the respective color components are synthesized on a screen (not shown), and a color image is displayed. The heat radiated to the front side of the light source lamp 14 passes through the small hole 18 b formed in the holder member 18 and the small hole 32 a formed in the leaf spring 32 through the hole 16 c formed in the lamp case 16. Is emitted.

  Next, adjustment of the optical axis in the lamp unit 2 will be described. First, as shown in FIG. 1, the lamp unit 2 is attached to the housing 1 a of the projector device 1. At this time, a cable (not shown) for supplying power to the light source lamp 14 is connected to the connector 28 of the lamp unit 2. Next, the optical axis of the light source lamp 14 is adjusted while turning on the light source lamp 14 and displaying an image on a screen (not shown). First, the holder member 18 is rotated by moving the adjustment protrusion 18i protruding from the adjustment long hole 20f of the base member 20 to the back side of the holder member support surface 20a, and the screen (not shown) has no color unevenness. Adjust so that a proper image is displayed. That is, when the adjustment protrusion 18i is moved in the adjustment elongated hole 20f, the holder member 18 and the lamp case 16 and the light source lamp 14 attached to the holder member 18 rotate about the central axis of the circular raised portion 20b. The angle of the optical axis of the lamp 14 can be adjusted. Next, by rotating the two adjusting screws 40 screwed into the two female screw holes 18h of the holder member 18, the lamp case 16 and the light source lamp 14 attached thereto are moved in parallel. That is, when the two adjusting screws 40 are tightened, their tips push the lamp case 16 upward in FIG. 2 against the bias of the leaf spring 32, and the lamp case 16 is moved upward. Conversely, when the two adjustment screws 40 are loosened, the lamp case 16 is pushed downward in FIG. By tightening or loosening the two adjusting screws 40, the optical axis of the light source lamp 14 is translated so that an appropriate image is displayed on a screen (not shown). Preferably, the adjustment screws 40 are adjusted so that the two adjustment screws 40 press the lamp case 16 with an equal force. Further, the adjustment for rotating the light source lamp 14 and the adjustment for parallel movement are repeated alternately so that an appropriate image is displayed on a screen (not shown). After the adjustment of the optical axis is completed, the screws 42 respectively screwed into the female screw holes 18f of the holder member 18 are tightened through the long holes 20d, and the holder member 18 is fixed at the adjusted position.

  According to the projector device of the embodiment of the present invention, the optical axis position can be easily and reliably adjusted with a simple mechanism. Moreover, since the adjustment protrusion 18i and the adjustment screw 40 can be operated from the back side of the holder member support surface 20a of the base member 20, respectively, the optical axis is adjusted only by operation from the back side of the holder member support surface 20a. be able to. Thus, the optical axis of the light source lamp 14 can be adjusted while checking the image while the lamp unit 2 is attached to the housing 1a of the projector device 1, that is, while the image is projected from the projector device 1 onto the screen. it can. Furthermore, since the numerous small holes 18b and 32a opened to ensure the heat radiation of the light source lamp 14 are formed sufficiently small, even if the glass of the light source lamp 14 is broken, It is possible to prevent debris from being scattered around. Further, since the front glass 22 is fixed by being sandwiched between the lamp case 16 and the clamp part 18g of the holder member 18, it is not necessary to fix the front glass 22 by adhesion or the like, and the lamp unit 2 is assembled. Efficiency can be improved.

  As mentioned above, although preferable embodiment of this invention was described, a various change can be added to embodiment mentioned above. In particular, the projector apparatus of the above-described embodiment uses a transmissive liquid crystal plate as a modulation optical system, but uses any element such as a reflective liquid crystal plate or a DMD (dynamic mirror device) as the modulation optical system. can do.

It is sectional drawing which shows the whole projector apparatus of embodiment of this invention. It is a disassembled perspective view of the lamp unit used for the projector apparatus of embodiment of this invention. It is a perspective view which shows the lamp unit of the assembled state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector apparatus of embodiment of this invention 2 Lamp unit 4a, 4b, 4c Dichroic mirror 6a, 6b Mirror 8a, 8b, 8c Liquid crystal board 10 Dichroic prism 12 Projection lens 14 Light source lamp 16 Lamp case 18 Holder member 18i Adjustment protrusion 20 Base Member 22 Front glass 32 Leaf spring 40 Adjustment screw

Claims (5)

A lamp unit used in a projector device,
A lamp assembly with a light source lamp;
A holder member for supporting the lamp assembly so as to be movable in the direction of a predetermined axis;
A base member for supporting the holder member on the holder member support surface so as to be rotatable about the predetermined axis;
Parallel position adjusting means configured to be able to adjust the position of the lamp assembly in the direction of the predetermined axis from the opposite side of the holder member support surface of the base member;
A rotation position adjusting means configured to be able to adjust the rotation position of the lamp assembly around the predetermined axis from the opposite side of the holder member support surface of the base member;
A lamp unit comprising:   The lamp unit according to claim 1, wherein the rotation position adjusting means is an adjustment protrusion that extends from the holder member through the base member to the opposite side of the holder member support surface.   The parallel position adjusting means is configured by a biasing spring that biases the lamp assembly in the direction of the predetermined axis, and an adjustment screw that presses the lamp assembly in the direction of the predetermined axis. Item 3. The lamp unit according to Item 2.   Furthermore, it has a front glass which protects the lamp | ramp of the said lamp assembly, and this front glass is pinched | interposed and hold | maintained between the said holder member and the said lamp assembly. Lamp unit. A lamp unit for emitting light source light;
A modulation optical system that modulates the light emitted by the lamp unit;
A projection lens that projects light modulated by the modulation optical system onto a screen;
The lamp unit is
A lamp assembly with a light source lamp;
A holder member for supporting the lamp assembly so as to be movable in the direction of a predetermined axis;
A base member for supporting the holder member on the holder member support surface so as to be rotatable about the predetermined axis;
Parallel position adjusting means configured to be able to adjust the position of the lamp assembly in the direction of the predetermined axis from the opposite side of the holder member support surface of the base member;
A rotation position adjusting means configured to be able to adjust the rotation position of the lamp assembly around the predetermined axis from the opposite side of the holder member support surface of the base member;
A projector apparatus comprising:

Images