JP2010122466A - Illuminating device, projector device, and image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that in a conventional illuminating device, a triaxial adjustment required after the assembly makes workability poor due to too much adjustment work, makes the adjustment work itself complicated, and requires skills for the adjustment work. <P>SOLUTION: An illuminating device includes a light emitting element 10 for emitting light, a light pipe 2, a holder 3, and a spring 9. In the light pipe 2, the light emitted from the light emitting element 10 is introduced from the incidence plane 2a, and the incident light is guided to be output from the output plane 2b. The holder 3 into which the light pipe 2 is inserted has a center hole 15 that supports the light pipe 2 in a manner that its attitude can be changed. The light emitting element 10 is disposed at the edge part on the incidence plane side of the light pipe 2 inserted into the center hole 15, facing the incidence plane 2a. The spring 9 provides a biasing force to the light pipe 2 toward the light emitting element 10 side and causes the incidence plane 2a to come in contact with the light emitting element 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display device that displays a stereoscopic image on a screen by arranging a plurality of projector devices having an illumination device, and more particularly to an improvement of an illumination device that constitutes a part of the projector device.

In recent years, various image display devices capable of displaying stereoscopic images have been proposed.
An image display device according to the present application captures a solid as a subject from a number of viewpoints, and uses a plurality of projector devices arranged in a horizontal direction to display the image information as an image corresponding to the viewpoint at the time of shooting. To synthesize. Thereby, the observer who sees a screen can observe the image in the case of seeing the real thing of a to-be-photographed object on the screen.
In this case, an image that is incident on the left eye when observing the real object is incident on the left eye even when the image display apparatus is observed, and an image that is incident on the right eye when observing the actual object is also observed when the image display apparatus is observed. Incident to the right eye. As a result, the viewer of the screen “sees” different images so as to observe the real object with the left and right eyes, and a stereoscopic effect is obtained for the images.

  As a conventional image display device of this type, for example, there is one described in Patent Document 1. Patent Document 1 describes a projection-type image display device that is suitable for being applied to an apparatus including a plurality of projection units for displaying a stereoscopic image. In the image display device described in Patent Document 1, a projection unit that modulates light emitted from a light source by a spatial light modulation unit and projects the light onto a screen by a projection optical system in a predetermined state. It is composed of multiple arrays. The image display device includes a base member in which through holes to which a plurality of projection units are attached are arranged, and the projection unit includes a projection lens group, a lens holder, a video display panel, a position adjustment unit, and a guide shaft. The projection lens group is composed of a plurality of projection lenses, and the projection lens group is fixed to the lens holder. The position adjustment unit includes a holder and a cover that protect the video display panel, and can perform focus adjustment by horizontally moving back and forth on the optical axis. The guide shaft is also used as a positioning shaft when guiding the horizontal movement of the position adjusting unit and attaching to the through hole of the base member.

  According to the image display apparatus having such a configuration (hereinafter referred to as “first conventional example”), the focus of the projection unit can be adjusted with a simple configuration, and a stereoscopic image can be displayed with a simple adjustment. (See paragraph [0012] of Patent Document 1).

  As another example of the conventional image display device, for example, there is a device described in Patent Document 2. Patent Document 2 describes a light guide member holding device that uniformly guides display light emitted from a light source and a projection device such as a projector including the light guide member holding device. The light guide member holding device according to Patent Document 2 includes a light guide member, first holder means, and second holder means. The light guide member is formed as a whole in a pyramid shape with a translucent material, and the first end surface having a small cross-sectional dimension is opposed to the light source to be an incident surface, and the second end surface having a large cross-sectional dimension is opposed to the display unit to be an output surface. It is said. Then, the display light emitted from the light source enters from the incident surface and is guided to the emission surface side while being irregularly reflected inside and supplied to the display unit. The first holder means is provided with a light guide member holding space having a circular or polygonal cross section having a diameter larger than the diagonal length of the incident surface of the light guide member and a smaller diameter than the diagonal length of the output surface. Yes. Further, the second holder means is provided with a display light emission opening that is opposed to the display unit by engaging the outer peripheral edge portion of the emission surface of the light guide member and facing outward. Further, the light guide member is sandwiched in the length direction between the first holder means and the second holder means, which are combined by aligning the axes of the light guide member holding space and the display light emitting opening. Each ridge line portion is held and combined by the inner peripheral wall of the light guide member holding opening.

  According to the light guide member holding device having such a configuration (hereinafter referred to as “second conventional example”), the first holder means holds each ridge portion of the light guide member, thereby reducing the light amount at the holding portion. Is reduced, and it is expected that display light can be efficiently supplied to the display unit (see paragraph [0020] of Patent Document 2).

  However, in both cases of the first conventional example and the second conventional example, the projector device is provided with an illumination device that uses a light-emitting element that emits a small, high-capacity light and that generates a small amount of heat as a light source. Yes. The projector device includes an illumination device and a projection optical system, and a white light emitting element as a light source of the illumination device supplies light to the liquid crystal panel, and an image obtained by the liquid crystal panel is an optical device having a projection lens. It is displayed on the screen through the system. At this time, the light guide member of the projector device expands the emitted light from the light emitting element close to the point light source to the screen size of the liquid crystal panel and projects an image with an appropriate F number.

  In the light guide member, a first end surface having a small cross-sectional dimension is opposed to the light emitting element as an incident surface, and a convex lens-shaped second end surface having a large cross-sectional dimension is opposed to the liquid crystal panel as an output surface. Then, the light emitted from the light source enters from the incident surface, is guided to the emission surface side while being irregularly reflected inside, is emitted from the emission surface, and is supplied to the liquid crystal panel.

  In order to obtain good light guide characteristics, it is preferable that the light incident surface of the light guide member is closely integrated with the light emission surface of the light emitting element as a light source. Therefore, conventionally, in order to increase the closeness between the incident surface of the light guide member and the emission surface of the light emitting element to obtain good light guide characteristics, the mutual contact surfaces (the incident surface of the light guide member and the emission surface of the light emitting element). A method of applying optical oil or the like having index matching to the surface) is widely used.

  However, when optical oil is used, there is a problem in that the light guide characteristics vary depending on the amount of coating, and the light guide characteristics vary. In addition, the optical oil has a problem that the improvement effect of the light guide characteristic is reduced due to the change in characteristics depending on the use environment, the use period, or the like, or volatilization and reduction. Further, there is a problem that the light emitting element is deteriorated by the influence of optical oil or the like.

  In addition, in order to obtain good light guide characteristics, the light axis of the light emitting element as the light source is adjusted so that the axes of the light emitting element and the incident surface of the light guide member coincide with each other. In this optical axis adjustment, there are an XY-axis direction adjustment for matching the axes of the light-emitting element's exit surface and the light-guiding member's incident surface, and a Z-axis direction adjustment in the Z-direction perpendicular to the XY-axis. is there. The XY axis direction adjustment is performed by moving the light emitting element in a plane direction perpendicular to the emission direction of the light emitting element. The Z-axis direction adjustment is a position adjustment in which the light guide member is moved in the optical axis direction with respect to the light emitting element, and the incident surface of the light guide member and the emission surface of the light emitting element are brought into contact.

As described above, the conventional optical axis adjustment requires the three-axis adjustment of the XY-axis direction adjustment and the Z-axis direction adjustment. For this reason, since a lot of adjustment work is required, not only the workability is bad, but also the adjustment work is complicated and the adjustment work requires skill.
JP 2007-187745 A JP 2006-195382 A

  The problem to be solved is that in the conventional lighting device, since three-axis adjustment is required after assembly, a lot of adjustment work is required and workability is poor. Further, the adjustment work itself is complicated, and the adjustment work requires skill.

  The illumination device of the present application includes a light source unit that emits light, a light guide member, a holder member, and an urging member. The light guide member allows the light emitted from the light source unit to be incident from the incident surface and guides the incident light to be emitted from the emission surface. The holder member has a through hole through which the light guide member is inserted, supports the light guide member inserted through the through hole so that the posture can be changed, and makes the light source unit face the incident surface of the light guide member. The urging member urges the light guide member toward the light source unit to bring the incident surface into contact with the light source unit.

  According to the illuminating device of the present application, by urging the light guide member toward the light source unit with the urging member, the incident surface of the light guide member can be brought into contact with and closely contacted with the emission surface of the light source unit. Therefore, it is possible to obtain good light guide characteristics by increasing the closeness between the incident surface of the light guide member and the exit surface of the light emitting element. Moreover, since the entrance surface of the light guide member is brought into close contact with the exit surface of the light emitting element by the biasing force of the biasing member, adjustment of the optical axis direction between the light guide member and the light emitting element can be made unnecessary. It is possible to simplify the position adjustment work of the light source and the like in this type of lighting device. Thereby, workability and productivity at the time of assembling the projector device and the image display device can be improved.

  A light source part, a light guide member, a holder member, and an urging member are provided, the urging member urges the light guide member toward the light source part, and the incident surface is brought into contact with the light source part. Accordingly, it is possible to increase the closeness between the incident surface of the light guide member and the exit surface of the light source unit to obtain good light guide characteristics and to easily adjust the position of the light source unit. Realized by a simple configuration.

  FIGS. 1-12 shows the example of embodiment of the illuminating device of this invention, a projector apparatus, and an image display apparatus. 1 to 3 show a first embodiment of a lighting device according to the present invention. FIG. 1 is a perspective view, FIG. 2 is an exploded perspective view, and FIG. 3 is a sectional view taken along line XX in FIG. 4 and 4 are sectional views taken along line YY of FIG. 5 and 6 show a first embodiment of the projector apparatus according to the present invention. FIG. 5 is a perspective view and FIG. 6 is an exploded perspective view. 7 to 12 show a first embodiment of the image display apparatus according to the present invention. FIG. 7 is an explanatory diagram showing a schematic configuration, FIG. 8 is a perspective view of a projector assembly, and FIG. FIG. 10 is an exploded perspective view of the projector assembly. Further, FIG. 11 is a diagram for explaining the operation of the projector assembly, and FIG. 12 is a diagram for explaining an example of an image display mode by the image display device.

  As shown in FIGS. 1-4, the illuminating device 1 shown as 1st Example of this invention is the light pipe 2, the holder 3, the holder cover 4, the holding member 5, the retainer 6, the spring receiving frame 7, and inclination correction | amendment. A plate 8, a spring 9, a light emitting element 10, a wiring board 11, a radiator 12 and the like are provided.

  The light pipe 2 is a specific example of a light guide member that uniformly guides light to be transmitted and guides light. The light pipe 2 transmits light such as a transparent synthetic resin material such as a transparent acrylic resin excellent in light guide characteristics or a glass material. Made of wood. The light pipe 2 is a quadrangular pyramid shaped member whose cross-sectional shape is larger than the area of one end, and has a rectangular cross-sectional shape. The first end face having a small cross-sectional dimension is used as the incident surface 2a. The large second end surface is the emission surface 2b. A line connecting the center of the entrance surface 2a and the center of the exit surface 2b with a straight line in the axial direction is an optical axis passing through the central portion of the light pipe 2 in the axial direction.

  The incident surface 2a of the light pipe 2 is formed as a plane that intersects perpendicularly with the axial center line forming the optical axis. Further, the light exit surface 2b of the light pipe 2 is formed in a convex lens shape as a curved surface developed in a direction intersecting with the axial line forming the optical axis. In this embodiment, the plane shapes of the incident surface 2a and the emission surface 2b are formed as rectangles elongated in the vertical direction. However, the light pipe may have a truncated pyramid shape, hexagonal shape, octagonal shape, or other square shape with a square cross-sectional shape, and may be formed as a circular truncated cone shape or an elliptical elliptic trapezoid shape with a cross-sectional shape. it can.

  Further, a flange portion 14 that protrudes outward in the radial direction is provided at an end portion on the inner side of the emission surface that is in the vicinity of the emission surface 2 b of the light pipe 2. The flange portion 14 is formed as a rectangular frame portion that is continuous in the circumferential direction at a portion slightly inside the emission surface 2b. The light exit surface 2 b side of the light pipe 2 is slidably held by the holder 3 via the holding member 5 by the flange portion 14. The retainer 6 is attached to the step formed on the light exit surface 2 b side of the flange portion 14 of the light pipe 2.

  The holder 3 shows a specific example of the holder member. In this embodiment, the holder 3 is formed as a rectangular tube-shaped member having a substantially rectangular cross-sectional shape. The incident surface 2a side of the light pipe 2 is inserted into a central hole 15 having a rectangular cross-sectional shape showing a specific example of a through hole penetrating the center portion of the holder 3. Long grooves 16 extending in parallel with the central hole 15 are respectively provided on the outer surfaces of the left and right side portions facing the width direction of the holder 3. The long groove 16 is continuous from one end to the other end in the longitudinal direction of the holder 3, and the spring 9 is accommodated in each long groove 16 so as to be extendable and contractible. On both end surfaces of the holder 3, screw holes 17 are provided at predetermined positions (four locations in this embodiment). A holding member 5 is disposed at one end of the holder 3 in the longitudinal direction.

  The holding member 5 is formed as a substantially rectangular frame having a size corresponding to the end face shape of the holder 3. The flange portion 14 of the light pipe 2 is slidably engaged with the rectangular opening 18 of the holding member 5. A notch 19 for avoiding interference with the locking piece 6a of the retainer 6 is provided at substantially the center of the two sides facing the width direction of the opening 18 of the holding member 5. Further, the holding member 5 is provided with insertion holes 21 at positions facing the four screw holes 17 provided in the holder 3.

  The retainer 6 is a specific example of the first frame member, and is formed as a rectangular frame having a size corresponding to the light exit surface 2 b of the light pipe 2. The end portion of the light pipe 2 on the light exit surface 2b side is fitted into the rectangular opening portion 22 of the retainer 6 and is positioned in contact with the flange portion 14. Locking pieces 6 a are respectively provided on the outer edges of the substantially central portions of the two sides facing the width direction of the retainer 6. The two locking pieces 6a, 6a are formed by being bent 90 ° toward one surface side of the retainer 6, and a hole is provided at each tip portion. One end of each of the two springs 9 and 9 is latched in the holes of the two locking pieces 6a and 6a.

  The holder cover 4 is formed as a substantially rectangular frame having the same size as the holder 3 and the holding member 5. The holder cover 4 has a function like a lid that covers the light exit surface 2 b side of the light pipe 2. For this reason, the holder cover 4 has a certain thickness, and a rectangular space portion 23 is provided on one surface side of the holder cover 4 that can accommodate the exit surface portion of the light pipe 2 to which the retainer 6 is attached. A rectangular opening 24 having the same size corresponding to the size of the emission surface 2 b is communicated with the space 23, and the holder cover 4 is moved in the thickness direction by the opening 24 and the space 23. It is penetrated.

  The holder cover 4 is provided with insertion holes 25 at positions facing the four screw holes 17 provided in the holder 3. After the screw shaft portion of the fixing screw 26 is inserted into these insertion holes 25 and further inserted into the insertion holes 21 of the holding member 5, the tip portion is screwed into the screw hole 17 of the holder 3 and tightened. Thereby, the holder cover 4 and the holding member 5 are fastened to the holder 3 by a plurality of (four in this embodiment) fixing screws 26 and are integrally fixed. Further, positioning holes 27 are provided on two sides of the holder cover 4 facing in the longitudinal direction. Corresponding to the positioning hole 27, the holder 3 and the holding member 5 are also provided with positioning holes, and the holder cover 4 and the holding member 5 are positioned on the holder 3 by positioning pins 28 passing through these positioning holes. .

  An inclination correction plate 8 for correcting the inclination of the light pipe 2 is mounted on the incident surface 2 a side of the light pipe 2 inserted into the central hole 15 of the holder 3. That is, a through hole 31 through which the light pipe 2 is penetrated is provided at a substantially central portion of the inclination correction plate 8. The diameter of the through hole 31 of the inclination correction plate 8 is set to the same length as the diagonal length of the portion slightly inward from the incident surface 2 a of the light pipe 2. The inclination correction plate 8 is formed of a rectangular plate that is slightly smaller than the central hole 15, and a semicircular protrusion 29 that protrudes outward is provided at the center of each of the four sides. The lengths in the longitudinal direction and the width direction of the inclination correction plate 8 including the protrusions 29 are set to be slightly longer than the lengths of the long side and the short side of the central hole 15, respectively.

  This inclination correction plate 8 is mounted in the central hole 15 of the holder 3 in a state of being slightly inclined with respect to the optical axis of the light pipe 2. At this time, as for the outer edge of the inclination correction plate 8, only the four projecting portions 29 are in contact with the inner surface of the central hole 15. By changing the tilt angle of the tilt correction plate 8, the posture can be changed (adjusted) by tilting the light pipe 2 in accordance with the tilt amount in the tilted direction (optical axis adjustment).

  Further, a spring receiving frame 7 showing a specific example of the second frame member is mounted on the side of the holder 3 opposite to the side on which the holder cover 4 is attached. The spring receiving frame 7 is formed of a rectangular frame that is long in the left-right direction, and is attached to the holder 3 with the central opening 32 aligned with the center of the central hole 15. On the outer edges of the two sides facing the left-right direction, which is the longitudinal direction of the spring receiving frame 7, the locking pieces 7a are formed by being bent 90 ° to the same surface side. A hole for latching the other end of the spring 9 is provided at the tip of each locking piece 7a.

  The spring 9 shows a specific example of the urging member. In this embodiment, a tension coil spring having hook portions provided at both ends of the coil portion is used. However, the biasing member is not limited to the spring of this embodiment, and for example, a rubber-like elastic body such as a rubber string can be used. One end of the spring 9 is latched in a hole provided in the locking piece 6 a of the retainer 6, and the other end is latched in a hole provided in the locking piece 7 a of the spring receiving frame 7 in a properly pulled state. It has been. The light pipe 2 is constantly biased toward the spring receiving frame 7 by the tensile force due to the elasticity of the spring 9.

  A wiring board 11 having a predetermined electric circuit on which a light emitting element (LED) 10 is mounted is disposed on the end surface of the holder 3 on the spring receiving frame 7 side. The light emitting element 10 is a specific example of the light source unit of the lighting device 1 and is attached to a substantially central portion of one surface of the wiring board 11. In this embodiment, an example in which the light emitting element 10 is used as a light source unit has been described. For example, an illumination lamp that emits light as a light source, and a reflecting mirror that collects light emitted from the illumination lamp and travels in a certain direction. Can also be configured. In this case, the illumination lamp may be a lamp that emits white light, or a discharge lamp, a high-pressure mercury lamp, or the like can be applied. The reflecting mirror has a hemispherical shell shape in which the egg shell is halved, and an illumination lamp is installed at a substantially central portion thereof.

  The wiring substrate 11 is formed as a substantially rectangular plate having the same size as the holder cover 4. Although not shown in the figure, this wiring board is provided with electrical wiring configured as a predetermined wiring circuit, as well as connectors, necessary electronic devices, and electronic components that are electrically connected to external power sources and devices. It is attached. Furthermore, the wiring board 11 is provided with insertion holes 33 for screwing to the holder 3 at a plurality of locations (four locations in this embodiment). A radiator 12 is attached to the surface of the wiring board 11 opposite to the surface on which the light emitting element 10 is mounted to take the heat of the light emitting element 10 and cool it.

  The radiator 12 includes a base plate 35 having a shape similar to that of the wiring board 11 and a large number of heat radiation fins 36 erected from one surface of the base plate 35. The base plate 35 and the large number of heat radiating fins 36 are integrally formed of a metal material having excellent thermal conductivity, for example, an aluminum alloy. In addition, as a material of the heat radiator 12, you may use a magnesium alloy according to a use. The base plate 35 is provided with the same number of insertion holes at positions corresponding to the four insertion holes 33 of the wiring board 11. Between the wiring board 11 and the base plate 35 of the radiator 12, a heat radiating sheet 38 for allowing heat generated by the light emitting element 10 to emit light from the wiring board 11 to the radiator 12 is interposed.

  Thus, after the screw shaft portion of the fixing screw 37 is inserted into the insertion hole provided in the wiring board 11 and the base plate 35, the tip end portion is screwed into the screw hole of the holder 3 and tightened. Thereby, the wiring board 11 and the radiator 12 are fastened to the holder 3 by a plurality (four in this embodiment) of fixing screws 37 and are integrally fixed. The spring receiving frame 7 is sandwiched between the holder 3 and the wiring board 11.

  As the material of the holder 3, the holder cover 4, the holding member 5, and the inclination correction plate 8, for example, glass fiber reinforced thermoplastic (G (F) RTP) or PPS resin (polyphenylene sulfide resin) is suitable. However, it is not limited to these, ABS resin (acrylonitrile butadiene styrene resin) etc. may be used, and metal materials, such as an aluminum alloy and a magnesium alloy, can also be used. Furthermore, as a material of the retainer 6 and the spring receiving frame 7, for example, plastic materials such as ABS resin can be used as well as stainless steel, steel steel, and other metal materials.

  The lighting device 1 having such a configuration can be assembled as follows, for example. First, the opening 22 of the retainer 6 faces the exit surface 2 b side of the light pipe 2, and the exit surface 2 b portion is inserted into the opening 22. At this time, the retainer 6 is positioned by the flange portion 14 by inserting the retainer 6 to the flange portion 14 of the light pipe 2. Next, the holding member 5 faces one side in the longitudinal direction of the holder 3, the incident surface 2 a side of the light pipe 2 is inserted into the opening 18 from the outside, and the incident surface 2 a side is inserted into the central hole 15 of the holder 3 as it is. Is inserted. Then, the flange portion 14 of the light pipe 2 is fitted into the opening 18 of the holding member 5, and the holding member 5 is brought into contact with one end of the holder 3.

  Next, the holder cover 4 faces the outside of the holding member 5, and the holder cover 4 is overlapped with the holding member 5. As a result, the exit surface 2b portion of the light pipe 2 to which the retainer 6 is attached is housed in the space 23 provided inside the holder cover 4. Therefore, the screw shaft portions of the four fixing screws 26 are inserted into the insertion holes 25, the insertion holes 21 of the holding member 5 are penetrated, and the tip portions are screwed into the screw holes 17 of the holder 3. The light pipe 2 is held by the holder 3 by tightening these fixing screws 26. At this time, the inclination correction plate 8 is inserted into the central hole 15 from the opposite side of the holder 3, and the incident surface 2 a side of the light pipe 2 is inserted into the through hole 31. In this state, the light pipe 2 is movable in the optical axis direction.

  Next, the spring receiving frame 7 is mounted on the side of the holder 3 opposite to the holder cover 4, and the wiring board 11 and the radiator 12 are made to face the outside. Then, the screw shaft portions of the four fixing screws 37 are inserted into the insertion holes 33 and the like, and the tip portions thereof are screwed into the screw holes of the holder 3. The wiring board 11 and the radiator 12 are fixed to the holder 3 by tightening these fixing screws 37. At this time, the light emitting element 10 fixed to the wiring board 11 is inserted into the opening 32 of the spring receiving frame 7 and faces the incident surface 2 a of the light pipe 2.

  Next, in the left and right long grooves 16 and 16 provided on both sides in the width direction of the holder 3, one end of the spring 9 is hooked on the locking piece 6 a of the retainer 6 disposed on one side in the longitudinal direction. The end is hooked to the locking piece 7a of the spring receiving frame 7 arranged on the other side in the longitudinal direction. In this case, the spring receiving frame 7 to which one end of the spring 9 is locked is mounted on the holder 3, while the retainer 6 to which the other end of the spring 9 is locked is fitted to the light pipe 2. The light pipe 2 is supported by the holding member 5 so as to be movable in the optical axis direction.

  Therefore, the spring force of the spring 9 acts as a force that biases the light pipe 2 toward the light emitting element 10 side. At this time, the light emitting element 10 is disposed on the optical axis of the light pipe 2, and the incident surface 2 a faces the emission surface of the light emitting element 10. As a result, the incident surface 2 a of the light pipe 2 is pressed against the emission surface of the light emitting element 10 by the spring force of the spring 9, and the incident surface 2 a is pressed against the light emitting element 10. In this way, the light pipe 2 is always urged toward the light emitting element 10 by the spring 9, and the incident surface 2a is always pressed and brought into close contact with the emission surface of the light emitting element 10 as a light source.

  Therefore, the incident surface 2a of the light pipe 2 and the exit surface of the light emitting element 10 can be directly brought into close contact with each other without using optical oil or the like as in the prior art. Thereby, the closeness between the entrance surface 2a of the light pipe 2 and the exit surface of the light emitting element 10 can be improved, and good light guide characteristics can be obtained. In addition, since the light pipe 2 is always urged in the optical axis direction by the spring 9 and the incident surface 2a is in close contact with the output surface, it is necessary to adjust the position of the light emitting element 10 in the optical axis direction, which is the output direction. Absent. Accordingly, it is possible to simplify the optical axis adjustment by omitting the position adjustment in the optical axis direction.

  Further, in order to obtain good light guide characteristics, the light emitting element 10 needs to be assembled with its center aligned with the center of the incident surface 2a of the light pipe 2 that is a light guide member. Therefore, the optical axis is usually adjusted after the assembly. This optical axis adjustment is for making the center of the exit surface of the light emitting element 10 coincide with the center of the entrance surface 2 a of the light pipe 2. Specifically, the wiring board 11 is orthogonal to the axis of the light pipe 2. This is done by moving in the direction of

  In this case, the diameters of the insertion holes 33 provided in the wiring board 11 and the insertion holes provided in the base plate 35 of the radiator 12 are set to be larger than the shaft diameter of the fixing screw 37 for assembling these to the holder 3. Therefore, in the state where the wiring board 11 and the like are temporarily fixed to the holder 3 with the fixing screw 37, the wiring board 11 and the like are moved in the orthogonal direction so that the center of the emission surface of the light emitting element 10 is set to the center of the incident surface 2a. The optical axis can be adjusted to match.

  The projector device 40 is configured by combining the illumination device 1 assembled in this way with the projection optical system 41. The projector device 40 modulates the light emitted from the illumination device 1 by the spatial light modulation unit of the projection optical system 41 and emits it, and projects an image on the screen. The projector device 40 has a configuration as shown in FIGS.

  In other words, the projector device 40 includes the illumination device 1 and the projection optical system 41 disposed on the holder cover 4 side of the illumination device 1, and is configured by assembling and integrating them. As shown in FIGS. 5 and 6, the projection optical system 41 includes a lens holder 42, a projection lens group 43, a liquid crystal holder 44, a liquid crystal panel 45, a liquid crystal cover 46, and the like.

  The lens holder 42 includes a cylindrical tube shaft portion 42a having an oval outer shape, and a base portion 42b provided continuously at one end in the axial direction of the tube shaft portion 42a. A projection lens group 43 including a plurality of projection lenses is supported inside the lens holder 42 so as to be fixed and / or movable. Further, a diaphragm portion that can adjust the transmitted light is provided at a predetermined position in the projection lens group 43 supported by the lens holder 42. A liquid crystal holder 44, a liquid crystal panel 45, and a liquid crystal cover 46 are disposed on the base portion 42 b side of the lens holder 42. The liquid crystal panel 45 is of a transmissive type that displays an image corresponding to the input video signal, and is held in a state sandwiched between the liquid crystal holder 44 and the liquid crystal cover 46 from the optical axis direction.

  The liquid crystal holder 44 and the liquid crystal cover 46 are fixed by an adhesive and can be moved together with the liquid crystal panel 45. The lighting device 1 is fixed to the liquid crystal cover 46 by a plurality of fixing screws 47 so as to be integrally fixed. Further, a plurality of (two in this embodiment) guide pins 48 are provided upright on the liquid crystal holder 44, and these first and second guide pins 48 a and 48 b slide on the base portion 42 b of the lens holder 42. It is movably penetrated. A return spring 49 is attached to the second guide pin 48b. The return spring 49 always urges the lens holder 42 in a direction to separate the lens holder 42 from the liquid crystal holder 44.

  The lens holder 42 and the liquid crystal holder 44 are provided with two guide pins 48a, 48b by means of a plurality of (two in this embodiment) adjustment screws 51 arranged in directions in which the diagonal directions of the two guide pins 48a, 48b are different. 48b is used as a guide so as to be able to approach and separate. That is, by tightening the adjustment screw 51 against the spring force of the return spring 49, the return spring 49 can be compressed and the lens holder 42 can be brought closer to the liquid crystal holder 44. Further, by loosening the adjustment screw 51 and extending the return spring 49, the lens holder 42 can be moved away from the liquid crystal holder 44 by being pressed by the spring force of the return spring 49. By such an action of the adjusting screw 51, it is possible to adjust the distance between the final lens surface of the projection lens group 43 and the display surface of the liquid crystal panel 45 to achieve focusing.

  In the projector device 40 assembled in this way, light emitted from the light emitting element 10 as a light source is incident on the light pipe 2 from the incident surface 2a, is irregularly reflected and uniformed therein, and is parallelized from the output surface 2b. It is emitted as light. When the light emitted from the light pipe 2 is incident on the liquid crystal panel 45, an image corresponding to the input image signal is emitted from the projection optical system 41.

  The projector device 40 having such a configuration is used, for example, in an image display device 60 having a configuration as shown in FIG. The image display device 60 includes a projector assembly 61, a substrate holder 62, a screen 63, a mirror 64, a substrate 65, and the like.

  As shown in FIGS. 8 to 10, the projector assembly 61 includes a large number of projector devices 40 and a projector base 71 that holds the large number of projector devices 40 together. The projector base 71 includes a horizontally long base portion 72 in which the holding holes 72 for holding the projector device 40 are provided as many as the projector device 40 and a rectangular frame portion 73 surrounding the base portion 72. Have. In this embodiment, the plurality of holding holes 72 are arranged in six steps in the vertical direction, and are arranged side by side and at predetermined intervals in each step. Further, the multiple holding holes 72 are arranged so as to be deviated from each other by ½ pitch between the upper and lower adjacent steps.

  Each holding hole 72 of the projector base 71 is formed as an oval hole having the same shape and size corresponding to the shape and size of the projection optical system 41 portion of the projector device 40. Furthermore, a first insertion hole 73 a through which the first guide pin 48 a of the projector device 40 is inserted is provided in the upper right portion of each holding hole 72. A second insertion hole 73 b through which the second guide pin 48 b of the projector device 40 is inserted is provided at the lower left corner of each holding hole 72. The projector assembly 61 holding a large number of projector devices 40 is attached to the substrate holder 62 with the projection light emitting surface formed by the large number of projector devices 40 facing in the front direction.

  The substrate holding table 62 includes a shelf plate 75 that supports the projector assembly 61, a base plate 76 that supports the shelf plate 75, a substrate holding plate 77 mounted on the shelf plate 75, and the like. The substrate holding plate 77 holds a plurality of substrates 65 in a stacked manner, and a plurality of substrates are erected on the upper surface of the shelf plate 75 at a predetermined interval in the surface direction. Predetermined image information is stored in advance on the substrate 65 held on the substrate holding plate 77, and image light corresponding to a video signal sent from the substrate 65 is emitted from each projector device 40.

  A screen 63 is arranged in front of the projector assembly 61 held on the substrate holder 62 with a predetermined interval. The screen 63 is held by a screen frame 81 arranged on one side thereof, and an upper frame 82 and a lower frame 83 arranged vertically. The screen 63 is constituted by a diffusion plate having a diffusion anisotropy having a large diffusion angle in the vertical direction and a minute diffusion angle in the horizontal direction. Mirrors 64 are disposed on the left and right sides of the screen 63 (in FIG. 11, only the mirror 64 disposed on one side is shown).

  The mirror 64 reflects the projection light that does not enter the screen 63 out of the projection light projected from the projector device 40 and projects it onto the screen 63. The mirror 64 is held by a mirror holder 85 disposed above the mirror 64. The mirror holder 85 is held by a mirror holder holding frame 86 disposed above the mirror holder 85, and the mirror holder holding frame 86 is held by a side frame 87. The screen 63 is disposed on the base plate 76 via the screen frame 81 and the like, and the mirror 64 is disposed on the base plate 76 via the side frame 87 and the like.

  The principle of displaying a three-dimensional image in the image display device 60 having such a configuration will be described with reference to FIGS. FIG. 11 is a diagram illustrating a projection state of image light projected from each projector device 40 of the projector aggregate 61 of the image display device 60. A large number of projector devices 40 are arranged at predetermined intervals in the horizontal direction, and the emission surfaces of the projection light Lp projected from each projector device 40 are arranged so as to be substantially aligned with one plane. FIG. 12 schematically shows an image display mode using a plurality of pieces of image information.

  As the information for displaying the image, for example, a three-dimensional image to be displayed in advance is photographed by a photographing device from a plurality of directions, and n pieces of image information (n is plural, for example, 100 or more) necessary for displaying the stereoscopic image are prepared. Store in a storage device that does not. For example, the projected light is projected from one projector device 40m toward the screen 63 as indicated by arrows m1 to m5. The projection light m <b> 1 ′ is light that is projected toward the screen 63 after being reflected by the mirror 64. The angles at which these projection lights m1 ′ and m2 to m5 pass through the screen 63 are substantially maintained by adopting a configuration in which the screen 63 has a minute diffusion angle in the horizontal direction.

  Here, the light indicated by the arrows m1 ′ and m2 to m5 is a part of the plurality of pieces of image information P1 to Pn constituting a stereoscopic image prepared in advance, and part of the pieces of image information P2m to P2m divided in the vertical direction. Pnm is displayed. In this case, since the screen 63 has a large diffusion angle in the vertical direction and a minute diffusion angle in the horizontal direction, information of one projector device 40m is diffused only in the vertical direction. It appears as a vertical line display. That is, when the position on the screen 63 through which the light indicated by the arrows m1 ′ and m2 to m5 passes is defined as a unit pixel, the vertical lines constituting the stereoscopic image are formed from the unit pixels extending in the vertical direction toward the observer's pupil. The image information P2m to Pnm is emitted.

  Here, in the display line of the unit pixel adjacent to the screen 63, the display information from the adjacent projector device 40 enters the eye. Therefore, by allowing necessary information to enter the eyes from the plurality of projector devices 40, the image on the screen 63 observed by the left and right eyes can be seen as a composite image of vertical line display by each projector device 40. . At this time, when the screen 63 is configured to have a minute diffusion angle of, for example, less than about 1 ° in the horizontal direction, a good stereoscopic image can be obtained without generating a gap between the vertical lines displayed by the projector devices 40. Display can be made.

  By the way, in the image display device 60 shown in FIG. 12, the image on the screen 63 that can be seen by the left and right eyes appears as a composite image of the vertical line display by each projector device 40. However, when the diffusion angle in the horizontal direction of the diffusion plate of the screen 63 is almost 0 degrees, a vertical stripe is conspicuous because a gap is generated between the vertical lines displayed by the projector devices 40. For this reason, the gap between the vertical lines can be filled by setting the horizontal diffusion angle to be less than about 1 °, for example.

  As described above, according to the present invention, the light pipe is urged toward the light source portion by the urging member, and the incident surface of the light pipe is brought into contact with the emission surface of the light emitting element as the light source. The entrance surface and the exit surface can always be kept in close contact with each other. Therefore, good and stable light guide characteristics can be obtained without connecting the entrance surface and the exit surface using optical oil or the like as in the prior art. In addition, since there is no possibility of causing deterioration of the light emitting element due to optical oil or the like, the life of the light emitting element can be extended. Further, since the light pipe and the light emitting element are elastically held by the urging member and the incident surface and the light emitting surface are always in close contact with each other, the adjustment work may be performed only by adjusting the optical axis. It is possible to simplify the position adjustment work for bringing the light incident surface into close contact.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, the illumination device and the projector device show one embodiment of the present invention, and the external shape and lens arrangement of these devices and components are not limited to the illustrated embodiment.

It is the perspective view seen from the front side which shows the 1st Example of the illuminating device of this invention. It is the disassembled perspective view which shows the 1st Example of the illuminating device of this invention. The 1st example of the illuminating device of this invention is shown, and it is explanatory drawing which cut | disconnected the XX line part of FIG. FIG. 2 is a diagram illustrating a first embodiment of the illumination device according to the present invention, and is an explanatory view in which a YY line portion in FIG. 1 is cut. It is a perspective view which shows the 1st Example of the projector apparatus of this invention. 1 is an exploded perspective view showing a first embodiment of a projector apparatus of the present invention. It is explanatory drawing which shows schematic structure of the 1st Example of the image display apparatus of this invention. 1 is a perspective view showing a projector assembly used in a first embodiment of an image display device of the present invention. It is a side view of the projector assembly shown in FIG. FIG. 9 is a perspective view of a projector base and a projector device that are constituent elements of the projector assembly shown in FIG. 8. It is explanatory drawing explaining operation | movement of the projector aggregate | assembly shown in FIG. It is explanatory drawing which shows the example of the image display mode by the 1st Example of the image display apparatus of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Light pipe (light guide member), 2a ... Incident surface (1st end surface), 2b ... Outgoing surface (2nd end surface), 3 ... Holder (holder member), 4 ... Holder cover, DESCRIPTION OF SYMBOLS 5 ... Holding member, 6 ... Retainer (1st frame member), 7 ... Spring receiving frame (2nd frame member), 8 ... Inclination correction board, 9 ... Spring (biasing member), 10 ... Light emitting element (light source) Part), 11 ... wiring board, 12 ... radiator, 14 ... flange part, 15 ... central hole (through hole), 16 ... long groove, 18 ... opening, 19 ... notch, 40 ... projector device, 41 ... projection optics System 42. Lens holder 43 43 Projection lens group 45 Liquid crystal panel 60 Image display device 61 Projector assembly 62 Board support stand 63 Screen 65

Claims (8)

A light source that emits light;
A light guide member that makes light emitted from the light source unit incident from an incident surface and guides the incident light to be emitted from the emission surface;
A holder member having a through hole through which the light guide member is inserted and supporting the light guide member inserted through the through hole so that the posture of the light guide member can be changed, and making the light source portion face the incident surface of the light guide member When,
An illuminating device, comprising: an urging member that urges the light guide member toward the light source unit to bring the incident surface into contact with the light source unit. The light guide member has a truncated pyramid shape or a truncated cone shape in which the area of the exit surface is larger than the area of the entrance surface,
A holding member to be mounted in the vicinity of the emission surface is provided,
The lighting device according to claim 1, wherein the light guide member is urged to the light source unit by the urging member via the holding member. Providing a flange portion projecting radially outward in the vicinity of the exit surface of the light guide member,
The lighting device according to claim 2, wherein an outer peripheral surface of the flange portion is slidably supported by the holder member. A spring receiving member disposed on the side of the holder member on which the light source unit is disposed;
The biasing member is provided by arranging a pair symmetrically across the light guide member,
The lighting device according to claim 2, wherein the pair of urging members are stretched between the holding member and the spring receiving member. The light source unit is fixed to a wiring board fixed to one end of the holder member,
The lighting device according to claim 1, wherein a radiator is provided in close contact with a surface of the wiring board opposite to the light source unit. The lighting device according to claim 1, wherein the light source unit is any one of a discharge lamp, a light emitting diode, and a laser. A lighting device that emits light;
A projection optical system for projecting an image on a screen by modulating and emitting the light emitted from the illumination device by a spatial light modulator; and
The lighting device includes:
A light source that emits light;
A light guide member that makes light emitted from the light source unit incident from an incident surface and guides the incident light to be emitted from the emission surface;
A holder member having a through hole through which the light guide member is inserted and supporting the light guide member inserted through the through hole so that the posture of the light guide member can be changed. When,
A projector device comprising: an urging member that urges the light guide member toward the light source unit to bring the incident surface into contact with the light source unit. A plurality of projector devices for displaying an image by modulating light emitted from the illumination device by a spatial light modulator and projecting the light from a projection optical system onto a screen;
The lighting device includes:
A light source that emits light;
A light guide member that makes light emitted from the light source unit incident from an incident surface and guides the incident light to be emitted from the emission surface;
A holder member having a through hole through which the light guide member is inserted and supporting the light guide member inserted through the through hole so that the posture of the light guide member can be changed, and making the light source portion face the incident surface of the light guide member When,
An image display apparatus, comprising: an urging member that urges the light guide member toward the light source unit to bring the incident surface into contact with the light source unit.

Images