JP2010113322A - Illuminating device, image display device and mirror unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely position a mirror to a predetermined turning position and to miniaturize a mirror unit. <P>SOLUTION: The mirror unit 10c includes a base 100 constituted by integrally molding an upper plate portion 101, a lower plate portion 102, a back plate portion 103 connecting the upper plate portion 101 and the lower plate portion 102, and wall portions 104. A mirror holder 200 for holding a mirror 201 is pivotally supported to be turnable between the upper plate portion 101 and the lower plate portion 102. A motor 504 that is a drive source of the mirror holder 200 is mounted in a recess 105 disposed between the two wall portions 104. The recess 105 communicates with the upper plate portion 101, and a transmission mechanism transmitting driving force of the motor 504 to the mirror holder 200 is disposed on the upper plate portion 101. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an illuminating device, a video display device on which the illuminating device is mounted, and a mirror unit suitable for use in the illuminating device.

  Currently, projection-type image display devices (hereinafter referred to as “projectors”) that enlarge and project an image onto a screen have been commercialized and widely used. In such projectors, a lamp is generally used as a light source, and light from the lamp is modulated by a light modulation element and projected onto a screen.

  In this case, if the lamp is turned off during the projection operation, the image display is interrupted. In order to avoid such inconvenience, there has been proposed a projector in which two lamps are arranged in advance and the remaining lamps are used when the lamps in use are cut off (for example, Patent Document 1). 2).

In this configuration, two lamps are arranged so as to face each other, and a mirror unit is arranged between these lamps. In the mirror unit, a mirror is rotatably arranged. When the first lamp is used, the mirror is positioned in the first position facing the first lamp, and when the second lamp is used, the mirror is positioned in the second position facing the second lamp. It is done.
JP-A-2-257192 JP-A-4-104583

  When the lamp is switched using the mirror as described above, it is necessary to appropriately tilt the mirror with respect to the light flux from the lamp. In other words, when the tilt angle of the mirror deviates from an appropriate angle, there may be a problem that uneven color occurs in the projected image and a decrease in illuminance occurs. Therefore, in the above configuration, the mirror needs to be accurately positioned at the first position and the second position.

  In addition, the projector body increases in size as the mirror unit increases in size. For this reason, the mirror unit needs to be as small and compact as possible.

  Furthermore, when assembling the mirror unit, it is necessary to mount a motor and a transmission mechanism for transmitting the driving force from the motor to the mirror, and to detect the rotational position of the mirror. It is necessary to attach a switch or a circuit board to the base. Therefore, it is desirable that these members can be easily attached.

  The present invention has been made in view of the above problems, and an object of the present invention is to accurately position a mirror at a predetermined rotation position and to reduce the size of the mirror unit. In addition, an object of the present invention is to improve workability when assembling a mirror unit.

  A 1st aspect of this invention is related with an illuminating device. The illumination device according to this aspect includes a first light source that emits a first light beam, a second light source that emits a second light beam and is disposed so that the second light beam overlaps the first light beam. The first position where the first light flux and the second light flux overlap each other and the first position reflecting the first light flux in the target direction and the second position reflecting the second light flux in the target direction And a mirror unit capable of rotating the mirror between the positions. The mirror unit includes an upper plate portion and a lower plate portion, and a base integrally formed with a connecting portion for connecting them, and holds the mirror and is rotatable between the upper plate portion and the lower plate portion. A mirror holder pivotally supported by the motor, a motor serving as a drive source for the mirror holder, and a transmission mechanism for transmitting the driving force of the motor to the mirror holder. And the said connection part comprises the recessed part distribute | arranged between these two wall parts which regulate rotation of the said mirror holder, and these wall parts, and connects with at least one of the said upper board part and the said lower board part, A motor is disposed in the recess.

  According to the illumination device according to this aspect, since the mirror holder is pivotally supported by the integrally molded base, the base is composed of a plurality of components, and when the mirror holder is attached to the base while assembling these components, In comparison, the mirror holder is less likely to be displaced or displaced. Therefore, the mirror can be accurately positioned at the first position and the second position.

  Further, according to the illumination device according to this aspect, since the motor is housed in the recess formed in the connecting portion, it is possible to suppress the motor from jumping out from the outline of the base outer shape. It can be made compact.

  In the illumination device according to the first aspect, the transmission mechanism can be disposed on either the upper plate portion or the lower plate portion to which the concave portion is connected. If it carries out like this, since a transmission mechanism is distribute | arranged to the position near a motor and it is easy to connect with a motor, a transmission mechanism can be easily attached with respect to a base.

  Further, at this time, it is preferable that a circuit board related to driving of the mirror holder is disposed on the upper plate portion or the lower plate portion on which the transmission mechanism is disposed. If it carries out like this, since a circuit board can be attached with attachment of a transmission mechanism, the assembly operation | work of a mirror unit can be performed still more easily. Here, when the circuit board includes a position detector for detecting the rotational position of the mirror, the position detector can be arranged at a predetermined position on the base by mounting the circuit board.

  A second aspect of the present invention relates to a video display device. An image display device according to this aspect includes an illumination device having the above configuration, a modulation element that modulates illumination light generated by the illumination device according to a video signal, and illumination light from the illumination device to the modulation element. And a light guide optical system that guides the light. According to the video display device according to this aspect, the effect of the lighting device according to the first aspect can be obtained.

  A third aspect of the present invention relates to a mirror unit. The mirror unit which concerns on this aspect is provided with the structure of the mirror unit as described in the illuminating device which concerns on the said 1st aspect. Therefore, according to the mirror unit according to this aspect, the same effect as described in the first aspect can be achieved.

  As described above, according to the present invention, the mirror can be accurately positioned at a predetermined rotation position, and the mirror unit can be miniaturized. In addition, the workability at the time of assembling the mirror unit can be improved.

The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is put into practice, and the present invention is not limited to what is described in the following embodiment.

  The configuration of the projector according to the embodiment will be described below with reference to the drawings.

  FIG. 1 is a diagram (outer perspective view) showing a configuration of a projector. The projector includes a cabinet 1. The cabinet 1 has a substantially rectangular parallelepiped shape that is thin in the vertical direction and long in the front-rear direction, and an intake port 5 for taking outside air into the cabinet 1 is formed on a side surface thereof.

  In the cabinet 1, an optical engine 2, a projection lens 3, and a cooling device 4 are arranged. The optical engine 2 generates light (video light) modulated by the video signal. A projection lens 3 is attached to the optical engine 2, and a front portion of the projection lens 3 is exposed from the front surface of the cabinet 1. The image light generated by the optical engine 2 is projected by the projection lens 3 onto a screen surface arranged in front of the projector. The cooling device 4 takes in outside air from the intake port 5 and supplies this outside air to the optical engine 2 as cooling air.

  FIG. 2 is a diagram illustrating a configuration of the optical engine. In the figure, reference numeral 10 denotes a lighting device having two lamps 10a and 10b and a mirror unit 10c. The lamps 10a and 10b are an ultrahigh pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like. Light from the lamps 10a and 10b is emitted as substantially parallel light by the action of the reflector.

  The mirror unit 10c is provided with a mirror that can be rotated in parallel with the XZ plane of FIG. The mirror is rotated so that the light from the lamp 10a is guided to the fly eye integrator 11 when the lamp 10a is started, and the light from the lamp 10b is guided to the fly eye integrator 11 when the lamp 10b is started. The configuration of the mirror unit 10c will be described later with reference to FIGS.

  Light from the illumination device 10 is incident on a PBS (polarized beam splitter) array 12 and a condenser lens 13 via a fly eye integrator 11. The fly-eye integrator 11 includes first and second fly-eye lenses made up of eyelid-shaped lens groups, and the illumination device 10 has a uniform light amount distribution when entering the liquid crystal panels 18, 24, 33. An optical action is imparted to the light incident from.

  The PBS array 12 has a plurality of PBSs and half-wave plates arranged in an array, and aligns the polarization direction of the light incident from the fly eye integrator 11 in one direction. The condenser lens 13 imparts a condensing function to the light incident from the PBS array 13. The light transmitted through the condenser lens 13 enters the dichroic mirror 14.

  The dichroic mirror 14 transmits only the light in the blue wavelength band (hereinafter referred to as “B light”) out of the light incident from the condenser lens 13, and the light in the red wavelength band (hereinafter referred to as “R light”). Reflects light in the green wavelength band (hereinafter referred to as “G light”). The B light transmitted through the dichroic mirror 14 is reflected by the mirror 15 and enters the condenser lens 16.

  The condenser lens 16 imparts an optical action to the B light so that the B light enters the liquid crystal panel 18 as substantially parallel light. The B light transmitted through the condenser lens 16 is incident on the liquid crystal panel 18 via the incident side polarizing plate 17. The liquid crystal panel 18 is driven according to the blue video signal, and modulates the B light according to the driving state. The B light modulated by the liquid crystal panel 18 is incident on the dichroic prism 20 via the emission side polarizing plate 19.

  Of the light reflected by the dichroic mirror 14, G light is reflected by the dichroic mirror 21 and enters the condenser lens 22. The condenser lens 22 imparts an optical action to the G light so that the G light enters the liquid crystal panel 24 as substantially parallel light. The G light transmitted through the condenser lens 22 is incident on the liquid crystal panel 24 through the incident side polarizing plate 23. The liquid crystal panel 24 is driven according to the green video signal and modulates the G light according to the driving state. The G light modulated by the liquid crystal panel 24 is incident on the dichroic prism 20 via the output side polarizing plate 25.

  The R light transmitted through the dichroic mirror 21 is incident on the condenser lens 26. The condenser lens 26 imparts an optical action to the R light so that the R light enters the liquid crystal panel 33 as substantially parallel light. The R light transmitted through the condenser lens 26 travels on an optical path composed of relay lenses 27, 29, 31 for adjusting the optical path length and two mirrors 28, 30, and is incident on the liquid crystal panel 33 through the incident side polarizing plate 32. . The liquid crystal panel 33 is driven according to the red video signal, and modulates the R light according to the driving state. The R light modulated by the liquid crystal panel 33 is incident on the dichroic prism 20 via the emission side polarizing plate 34.

  The dichroic prism 20 color-combines the B light, G light, and R light modulated by the liquid crystal panels 18, 24, and 33, and enters the projection lens 35. The projection lens 35 includes a lens group for forming an image of projection light on the projection surface, and an actuator for adjusting a zoom state and a focus state of the projection image by displacing a part of the lens group in the optical axis direction. It has. The light synthesized by the dichroic prism 20 is enlarged and projected on the screen by the projection lens 3.

  Next, the configuration of the mirror unit 10c will be described with reference to FIGS.

  FIG. 3 is an exploded perspective view of the mirror unit 10c. As illustrated, the mirror unit 10 c includes a base 100, a mirror holder 200, an adjustment plate 300, a substrate 400, and a drive unit 500.

  The base 100 includes an upper plate portion 101, a lower plate portion 102, a back plate portion 103, and two wall portions 104. The upper plate portion 101, the lower plate portion 102, the back plate portion 103, and the two wall portions 104 are integrally formed. In addition, a concave portion 105 connected to the upper plate portion 101 is disposed between the two wall portions 104.

  The upper plate portion 101 has a shaft hole 106 that engages with the bearing 204 of the mirror holder 202, an arc-shaped guide hole 107 through which the projection 205 of the mirror holder 202 moves, and a side surface of the upper plate portion 101 to the shaft hole 106. A linear guide hole 108 is formed. In addition, two bosses 109 having bosses and screw holes are formed on the upper surface of the upper plate portion 108. A substrate 400 is mounted on these two bosses 109.

  The lower plate portion 102 is parallel to the upper plate portion 101. A shaft hole 110 that engages with the shaft 203 of the mirror holder 200 is formed in the lower plate portion 102 at a position that is coaxial with the shaft hole 106 of the upper plate portion 101.

  Concave portions 111 having a slightly larger outline than the adjustment plate 300 are formed on the inner surfaces of the two wall portions 104 and the back plate portion 103. The adjustment plate 300 is fitted into the recess 111 and screwed. In addition, screw holes 112 that are screwed into the adjusting screws 301 are formed on the outer surfaces of the two wall portions 104. Each of these screw holes 112 penetrates into the concave portion 111 on the inner side surface of the wall portion 104. Further, two bosses 113 having bosses and screw holes are formed on the outer surfaces of the two wall portions 104. A cover 506 is attached to these two bosses 113.

  The two wall portions 104 each have an angle of about 45 ° with respect to the traveling direction of light from the lamps 10a and 10b when the mirror unit 10c is disposed in the optical engine of FIG. It is formed so that it can tilt.

  A mirror 201 is attached to the mirror holder 200. A shaft 202 protrudes from the upper surface of the mirror holder 200. In addition, a shaft 203 protrudes from the lower surface of the mirror holder 200 at a position coaxial with the shaft 202. A bearing 204 that is rotatably supported in the shaft hole 106 is mounted on the shaft 202. Further, a protrusion 205 is formed on the upper surface of the mirror holder 200. When the mirror holder 200 is at the rotation end position, the protrusion 205 hits the detection switches 401 and 402 disposed on the lower surface of the substrate 400 and turns on the detection switches 401 and 402. In addition, a collar portion 206 is formed on the lower surface of the mirror holder 200.

  The adjustment plate 300 is made of an elastic metallic thin plate, and has a shape in which the left and right plate portions 300a and 300b are slightly closer than the shape along the inner surfaces of the two wall portions 104 and the back plate portion 103. Yes.

  Two detection switches 401 and 402 are mounted on the lower surface of the substrate 400. The substrate 400 is attached to the boss 109 with screws 403 in a state where the holes arranged at the two corners are engaged with the protrusions of the boss 109. The detection switches 401 and 402 are turned on by being pushed by the protrusion 205 on the upper surface of the mirror holder 200 when the mirror holder 200 is in the rotation end position.

  The drive unit 500 includes a gear 501 provided with a torque limiter 502, a gear 503, a motor 504, a gear 505 attached to a drive shaft of the motor 504, and a cover 506. Two gear portions 503a and 503b are formed on the gear 503, and shafts 503c and 503d are formed on the left and right ends. The cover 506 is formed with a shaft hole 506a that engages with a shaft 502a (see FIG. 4) of the torque limiter 502, and shaft holes 506b and 506c that engage with shafts 503c and 503d of the gear 503, respectively. The cover 506 is attached to the boss 113 with a screw 507. At this time, the two holes 506d formed in the cover 506 are engaged with the protrusions 114 formed on the upper surface of the upper plate portion 101.

  When the mirror unit 10c is assembled, first, the adjustment plate 300 is mounted in the recess 111. The adjustment plate 300 is screwed to the back plate portion 103 at the center portion while being fitted in the recess 111. As described above, the adjustment plate 300 has a shape in which the left and right plate portions 300a and 300b are slightly closer than the shape along the inner surfaces of the two wall portions 104 and the back plate portion 103. Therefore, when the central portion of the adjustment plate 300 is screwed to the recess 111 in this way, the left and right plate portions 300a and 300b are bent and pressed against the recess 111. In this state, the surface of the adjustment plate 300 is substantially flush with the inner surfaces of the two wall portions 104 and the back plate 103.

  Thereafter, the two adjustment screws 301 are screwed into the screw holes 112. When the rotation of the adjustment screw 301 is advanced, the tip of the adjustment screw 301 comes into contact with the inner surface of the adjustment plate 300. Thereafter, when the rotation is further advanced, the adjustment plate 300 is bent by being pushed to the tip by the adjustment screw 301. By adjusting the amount of rotation of the two adjusting screws 301, the amount of displacement of the plate portions 300a and 300b can be adjusted.

  Next, the mirror holder 200 is attached to the base 100 as follows. That is, the protrusion 205 is moved along the guide hole 107 from the guide hole 108 formed in the upper plate portion 101, and the shaft 202 below the bearing 204 is further moved from the guide hole 108 to the shaft hole 106. Then, the mirror holder 200 is moved downward so that the shaft 203 is engaged with the shaft hole 110 of the lower plate portion 102 and the bearing 204 is engaged with the shaft hole 106. Thus, the mirror holder 200 is rotatably attached between the upper plate portion 101 and the lower plate portion 102.

  Thereafter, the driving unit 500 is attached. First, the shaft 202 of the mirror holder 200 is attached to the torque limiter 502. Further, the motor 504 is mounted on the back plate portion 103 so as to be accommodated in the recess 105. Furthermore, the gear 503 is attached to the cover 506 by engaging the shafts 503c and 503d with the shaft holes 506b and 506c, respectively. Then, the cover 506 is screwed to the boss 113 with a screw 507 so that the gear portions 503a and 503b are screwed into the gears 505 and 501, respectively.

  Thereafter, the substrate 400 is screwed to the boss 109. At this time, the two detection switches 401 and 402 arranged on the substrate 400 are positioned in the vicinity of both ends of the guide hole 107.

  Finally, as shown in FIG. 4A, a coil spring 600 is attached to the back side of the lower plate portion 102. 4A and 4B are a bottom view and a top view of the assembled mirror unit, respectively. For convenience, the cover 506 is not shown in FIG.

  The coil spring 600 is attached to the mirror unit 10 c so that both ends are locked between a flange portion 206 formed on the lower surface of the mirror holder 200 and a flange portion 115 formed on the back surface of the lower plate portion 102. Here, the positional relationship between the flange 115 and the axis of the mirror holder 200 is as shown in FIG.

  In the state shown in FIG. 5A, the collar portion 205 is pulled by the coil spring 600, and the mirror holder 200 receives a counterclockwise force from the coil spring 600. Thereby, the back surface of the mirror holder 200 is pressed against the one wall portion 104. At this time, if the plate portion 300a of the adjustment plate 300 is lifted from the recess 111 by the adjustment screw 301, the back surface of the mirror holder 200 is pressed against the plate portion 300a.

  When the mirror holder 200 rotates in the clockwise direction from the state shown in FIG. 5A and the position of the collar part 206 exceeds the straight line connecting the collar part 115 and the shaft 203, the mirror holder 200 receives the clockwise force from the coil spring 600. Receive. Thereafter, when the mirror holder 200 rotates clockwise and comes to a position where the back surface comes into contact with the other wall portion 104, the back surface of the mirror holder 200 is pressed against the other wall portion 104 by the pulling force of the coil spring 600. At this time, if the plate portion 300b of the adjustment plate 300 is lifted from the recess 111 by the adjustment screw 301, the back surface of the mirror holder 200 is pressed against the plate portion 300b.

  The rotation end position of the mirror holder 200 can be adjusted by the amount by which the plate portions 300a and 300b are lifted by the adjustment screw 301. When the mirror unit 10c is incorporated in the optical engine shown in FIG. 2, the amount by which the plate portions 300a and 300b are lifted by the adjusting screw 301 so that the light from each of the lamps 10a and 10b is properly directed to the fly eye integrator 11. Is adjusted.

  FIG. 4C is a cross-sectional view showing the configuration of the torque limiter 502. This figure is an A-A 'sectional view in the vicinity of the torque limiter 502 in the assembled state of FIG.

  The torque limiter 502 includes a shaft 502a having a bearing 502b at the lower end, a coil spring 502c, and three washers 502d, 502e, and 502f. The bearing 502 b is engaged with the shaft 202 of the mirror holder 200. The upper end of the shaft 202 has a shape in which a part of a columnar shape is cut out in a planar shape, and the inner surface shape of the bearing 502 b is a shape that engages with the upper end of the shaft 202.

  The gear 501 has an H-shaped cross section, and a hole slightly larger than the shaft 502a is formed at the center. A shaft 502a is inserted into this hole. The gear 501 is sandwiched between two washers 502e and 502f from above and below. As described above, the upper end of the shaft 502a is engaged with the cover 506 in the shaft hole 506a. A coil spring 502c is disposed between the cover 506 and the washer 502e via a washer 502d. The coil spring 502c is inserted between washers 502d and 502e in a compressed state. Therefore, the gear 501 is pressed against the upper surface of the bearing 502b by the coil spring 502c.

  When the gear 501 rotates, the shaft 502a rotates due to the frictional force between the gear 501 and the washer 502e and the washer 502f and the frictional force between the washer 502f and the bearing 502. Thereby, the shaft 202 engaged with the bearing 502b is rotated, and the mirror holder 200 is rotated accordingly. On the other hand, for example, when the gear 501 is further rotated after the rear surface of the mirror holder 200 contacts the adjustment plate 300, the gear 501 slides with respect to the washer 502e and the washer 502f, and only the gear 501 is moved. Rotate. Thus, the torque limiter 502 transmits the driving force of the gear 501 to the shaft 202 only in the range of the static frictional force between the gear 501 and the washer 502f.

  FIG. 5 is a diagram showing a configuration of the mirror unit 10c in an assembled state. As shown in FIG. 5A, the mirror unit 10c is arranged so that the mirror 201 is directed to the lamp 10b when the back surface of the mirror holder 200 is in a position where it abuts against the plate portion 300a of the adjustment plate 300. At this time, the light from the lamp 10 b is reflected in the D direction by the mirror 201 and guided to the fly eye integrator 11. In the state shown in FIG. 5A, the mirror 201 is inclined by approximately 45 ° in the XZ plane direction with respect to the light traveling direction from the lamp 10b. The axes 202 and 203 of the mirror holder 200 are parallel to the Z axis.

  When the mirror holder 200 rotates from this state until the back surface of the mirror holder 200 comes into contact with the plate portion 300b (not shown in the drawing) of the adjustment plate 300, as shown in FIG. It is located at a position directed to the lamp 10a. At this time, the light from the lamp 10a is reflected in the D direction by the mirror 201 and guided to the fly eye integrator 11 as in the case of FIG. In this state, the mirror 201 is inclined by approximately 45 ° in the XZ plane direction with respect to the traveling direction of the light from the lamp 10a.

  As described above, the reflection direction of light by the mirror 201 can be adjusted by adjusting the adjusting screw 301. When the mirror unit 10 c is incorporated in the optical engine 2, the adjustment screw 301 is adjusted so that light from the lamps 10 a and 10 b is directed in the D direction and is appropriately incident on the fly eye integrator 11.

  As described above, according to the present embodiment, since the mirror holder 200 is pivotally supported by the integrally molded base 100, the base 100 is composed of a plurality of components, and the mirror holder 200 is mounted while assembling these components. Compared to the case of mounting on the base 100, the mirror holder 200 is less likely to be displaced or displaced. Therefore, the mirror 201 can be accurately positioned at the position for the lamp 10b shown in FIG. 5A and the position for the lamp 10a shown in FIG. 5B.

  Further, according to the present embodiment, since the motor 504 is accommodated in the recess 105 formed in the base 100, the motor 504 can be prevented from jumping out of the outline of the base 100. Therefore, the mirror unit 10c can be made small and compact.

  Further, according to the present embodiment, the transmission mechanism including the gear 501, the torque limiter 502, the gear 503, and the cover 506 is arranged on the upper plate portion 101 that is connected to the recess 105, and as shown in FIG. The transmission mechanism can be disposed near the motor 504 at a position where it can be easily connected to the motor 504, and thus the transmission mechanism can be easily attached to the base 100.

  Furthermore, according to the present embodiment, since the substrate 400 is disposed on the upper plate portion 101 where such a transmission mechanism is disposed, the substrate 400 can be attached together with the attachment of the transmission mechanism. Assembly work can be performed more easily.

  Here, position switches 401 and 402 for detecting the rotational position of the mirror holder 200 are arranged on the substrate 400. When the substrate 400 is mounted on the boss 109, these detection switches 401 and 402 are moved to the left and right of the guide hole 107. It is adjusted to face the end position. Therefore, according to the present embodiment, the position switches 401 and 402 can be easily arranged at predetermined positions on the base 100.

  As mentioned above, although embodiment of this invention was described, this invention is not restrict | limited to the said embodiment at all. The embodiment of the present invention can be variously modified in addition to the above.

  For example, in the above embodiment, the concave portion 105 is connected to only the upper plate portion 101, but the concave portion 105 may be connected to the lower plate portion 102. In the above embodiment, the transmission mechanism including various gears and the substrate 400 are mounted on the upper plate portion 101. However, the recess 105 is connected to the lower plate portion 102, and the transmission mechanism and the substrate 400 are connected to the lower plate portion 102. It may be attached to.

  Moreover, in the said embodiment, although the optical engine 2 was comprised so that lamp | ramp 10a, 10b might mutually oppose, for example, as shown in FIG. 6, the direction which inclines the light from lamp | ramp 10a, 10b with respect to a X direction. To the mirror unit 10c.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

FIG. 2 is a diagram showing an overview of a projector according to an embodiment. The figure which shows the structure of the optical engine which concerns on embodiment The disassembled perspective view which shows the structure of the mirror unit which concerns on embodiment The bottom view and top view which show the structure of the mirror unit which concerns on embodiment, and sectional drawing which shows the structure of a torque limiter. The figure which shows the structure of the mirror unit which concerns on embodiment The figure which shows the example of a change of the optical engine which concerns on embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Illuminating device 10a, 10b ... Lamp 10c ... Mirror unit 100 ... Base 101 ... Upper board part 102 ... Lower board part 103 ... Back board part (connection part)
DESCRIPTION OF SYMBOLS 104 ... Wall part 105 ... Recessed part 200 ... Mirror holder 201 ... Mirror 400 ... Substrate 401, 402 ... Detection switch 501, 503, 505 ... Gear (transmission mechanism)
502 ... Torque limiter (transmission mechanism)
504 ... Motor

Claims (9)

A first light source that emits a first luminous flux;
A second light source that emits a second light flux and is arranged so that the second light flux overlaps the first light flux;
A first position that is disposed at a position where the first light flux and the second light flux overlap, and a second position that reflects the first light flux in a target direction, and a second position that reflects the second light flux in the target direction. And a mirror unit that can rotate the mirror between
The mirror unit;
A base in which an upper plate portion and a lower plate portion and a connecting portion for connecting them are integrally formed;
A mirror holder that holds the mirror and is pivotally supported between the upper plate portion and the lower plate portion;
A motor as a drive source of the mirror holder;
A transmission mechanism that transmits the driving force of the motor to the mirror holder;
The connecting portion includes two wall portions for restricting the rotation of the mirror holder, and a concave portion arranged between these wall portions and connected to at least one of the upper plate portion and the lower plate portion,
The motor is disposed in the recess,
A lighting device characterized by that. The lighting device according to claim 1.
The transmission mechanism is disposed on either the upper plate portion or the lower plate portion to which the concave portion is connected,
A lighting device characterized by that. The lighting device according to claim 2,
A circuit board related to driving of the mirror holder is further disposed on the upper plate portion or the lower plate portion on which the transmission mechanism is disposed,
A lighting device characterized by that. The lighting device according to claim 3.
The circuit board includes a position detector that detects a rotational position of the mirror.
A lighting device characterized by that. The lighting device according to any one of claims 1 to 4,
A modulation element that modulates illumination light generated by the illumination device according to a video signal;
An image display device comprising: a light guide optical system that guides illumination light from the illumination device to the modulation element. A base in which an upper plate portion and a lower plate portion and a connecting portion for connecting them are integrally formed;
A mirror holder that holds a mirror and is pivotally supported between the upper plate portion and the lower plate portion;
A motor as a drive source of the mirror holder;
A transmission mechanism that transmits the driving force of the motor to the mirror holder;
The connecting portion includes two wall portions for restricting the rotation of the mirror holder, and a concave portion arranged between these wall portions and connected to at least one of the upper plate portion and the lower plate portion,
The motor is disposed in the recess,
Mirror unit characterized by that. The mirror unit according to claim 6,
The transmission mechanism is disposed on either the upper plate portion or the lower plate portion to which the concave portion is connected,
Mirror unit characterized by that. The mirror unit according to claim 7,
A circuit board related to driving of the mirror holder is further disposed on the upper plate portion or the lower plate portion on which the transmission mechanism is disposed,
Mirror unit characterized by that. The mirror unit according to claim 8,
The circuit board includes a position detector that detects a rotational position of the mirror.
Mirror unit characterized by that.

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