JP5472721B2 - Light source device and projector - Google Patents

Description

  The present invention relates to a light source device and a projector using the same.

  2. Description of the Related Art Today, data projectors are widely used as image projection apparatuses that project a screen of a personal computer, a video image, an image based on image data stored in a memory card or the like onto a screen. This projector focuses light emitted from a light source on a micromirror display element called DMD (digital micromirror device) or a liquid crystal plate, and displays a color image on a screen.

  In the past, projectors using a high-intensity discharge lamp as the light source have been the mainstream. However, in recent years, various projectors using light emitting diodes, laser diodes, organic EL, phosphors, etc. as the light source have been developed. There have been many.

  For example, Japanese Patent Laid-Open No. 2004-341105 (Patent Document 1) proposes a light source device including a fluorescent wheel in which a phosphor is laid in a circumferential direction and a light emitting diode that emits light in the ultraviolet region. . The light source device disclosed in Patent Document 1 is configured to irradiate a fluorescent wheel with ultraviolet light to excite the phosphor, and use light emitted from the phosphor as light source light.

  In addition, the applicant of the present application described in the previous application, a blue laser emitter, a fluorescent emission region in which a green phosphor layer is laid on the reflection surface, and a diffuse transmission in which a diffusion transmission plate is provided in the opening. The light source unit provided with the fluorescent wheel in which the area | region was arranged in the circumferential direction, and the red light emitting diode is proposed. In this proposal, the light emitted from the red light emitting diode is used as the light source light in the red wavelength band, and the light emitted from the green phosphor layer emitted using the light emitted from the blue laser emitter as the excitation light is used as the light source light in the green wavelength band. The light emitted from the diffuse transmission plate through which the light emitted from the blue laser emitter is diffusely transmitted is used as light source light in the blue wavelength band.

JP 2004-341105 A

  In the above-mentioned invention proposed by the present applicant, in order to increase the amount of fluorescent light, it is necessary to increase the output of the excitation light. As a method of increasing the output of the excitation light, there is a method of using a plurality of light emitting diodes. In this case, since the bright spots of the excitation light source increase, uneven illuminance and variations in brightness are caused. There is a risk of occurrence, and it is necessary to adjust the positions of a plurality of excitation light sources. In addition, the position of the light source other than the excitation light source may be adjusted.

  The present invention has been made in view of the above-described problems of the prior art, and provides a light source device that adjusts the position of a condenser lens and a projector that suppresses uneven illuminance and variations in brightness by using the light source device. The purpose is to do.

  A light source device for a projector according to the present invention covers a condensing lens that increases the directivity of light emitted from a light source, a lens mounting frame that holds an outer periphery of the condensing lens, and a circumferential portion of the light source. A light source holder that holds the lens mounting frame movably in a direction orthogonal to the optical axis of the condenser lens on the light emitting portion side of the light source, and the lens mounting frame of the condenser lens. A temporary pressing plate sandwiched between the light source holder so as not to move in the optical axis direction, and the light source holder has the lens mounting frame in a direction orthogonal to the optical axis of the condenser lens And an elastic part that holds the movement of the lens mounting frame by the adjusting part.

  In the projector light source device according to the present invention, a plurality of the adjustment sections are provided in a direction orthogonal to the optical axis of the condenser lens.

  Further, the plurality of adjusting portions in the light source device of the projector according to the present invention are disposed so as to contact the outer periphery of the lens mounting frame, and are disposed at positions facing the elastic portion contacting the outer periphery of the lens mounting frame. It is characterized by being.

  And the said adjustment part in the light source device of the projector which concerns on this invention is provided in two places, and both the said adjustment parts are the centers of the lens frame hole of the said light source holding body which arrange | positions the said lens attachment frame. It is characterized in that it is arranged at a position where the angle of crossing at 90 to 120 degrees.

  In the projector light source device according to the present invention, the lens mounting frame is brought into contact with the receiving surface of the light source holder, and is sandwiched between the temporary pressing plates, so that the position of the condenser lens in the optical axis direction is determined. It is fixed.

  Furthermore, the light source device of the projector according to the present invention further includes a lens mounting frame pressing plate that is integrated with the light source holder from above the temporary pressing plate.

  And the elastic part in the light source device of the projector according to the present invention is characterized in that it is continuously provided so as to hold a plurality of the lens mounting frames.

  A projector according to the present invention includes the light source device described above, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a projector control unit.

  According to the present invention, the condenser lens is fixed to the lens mounting frame, set on the light source holding body that holds the lens mounting frame, supported by the adjusting portion and the elastic portion, and the adjusting portion is operated to attach the lens. By freely adjusting the position of the frame, it is possible to provide a light source device that adjusts the position of the condensing lens and a projector that suppresses uneven illuminance and variations in brightness by using the light source device.

1 is an external perspective view showing a projector according to an embodiment of the invention. It is a figure which shows the functional circuit block of the projector which concerns on the Example of this invention. 1 is a schematic plan view showing an internal structure of a projector according to an embodiment of the invention. It is a perspective view of the adjustment unit of the light source device which concerns on the Example of this invention. It is the figure seen from the light emission surface side of the adjustment unit of the light source device which concerns on the Example of this invention. It is sectional drawing of the surface which connects the lens frame hole center of the adjustment unit of the light source device which concerns on the Example of this invention. It is a center cross section of the adjustment unit of the light source device which concerns on the Example of this invention. It is the figure seen from the light emission surface side of the adjustment unit before adjustment of the light source device which concerns on the Example of this invention. It is a side view of the adjustment unit before adjustment of the light source device which concerns on the Example of this invention. It is sectional drawing between the lens frame holes of the adjustment unit before adjustment of the light source device which concerns on this invention. It is the figure seen from the light emission surface side of the adjustment unit at the time of adjustment of the light source device which concerns on the Example of this invention. It is a side view of the adjustment unit at the time of adjustment of the light source device which concerns on the Example of this invention.

  Hereinafter, modes for carrying out the present invention will be described. The light source device of the projector 10 includes a collimator lens 73 that is a condensing lens that increases the directivity of light emitted from an excitation light source 71 that is a light source, a lens mounting frame 74 that holds the outer periphery of the collimator lens 73, and an excitation light source 71. A light source holder 79 that holds the lens mounting frame 74 movably in a direction perpendicular to the optical axis of the collimator lens 73 on the light emitting unit side of the excitation light source 71, and a lens mounting A lens mounting frame presser 88 that is a temporary presser plate that sandwiches the frame 74 with the light source holder 79 so that the frame 74 does not move in the optical axis direction of the collimator lens 73. The light source holder 79 includes an adjustment screw 85 that is an adjustment unit that can move the lens attachment frame 74 in a direction orthogonal to the optical axis of the collimator lens 73, and the movement of the lens attachment frame 74 by the adjustment screw 85. A lens mounting frame locking spring 86, which is an elastic part that holds the lens.

  A plurality of adjusting screws 85 are provided in a direction orthogonal to the optical axis of the collimator lens 73.

  Further, the plurality of adjusting screws 85 are disposed so as to contact the outer periphery of the lens mounting frame 74 and are disposed at positions facing the lens mounting frame locking springs 86 contacting the outer periphery of the lens mounting frame 74.

  The adjustment screws 85 are provided at two locations, and the two adjustment screws 85 are located at a position where the angle at the center of the lens frame hole 79b of the light source holder 79 in which the lens mounting frame 74 is arranged is 90 degrees to 120 degrees. Be placed.

  Further, the lens mounting frame 74 is brought into contact with the receiving surface of the light source holder 79 and is held by the lens mounting frame holder 88, thereby fixing the position of the collimator lens 73 in the optical axis direction.

  Furthermore, a presser plate 89 serving as a lens mounting frame presser plate integrated with the light source holder 79 from above the lens mounting frame presser 88 is further provided.

  The lens mounting frame locking spring 86, which is an elastic portion, is continuously provided so as to hold a plurality of lens mounting frames 74.

  The projector 10 includes the above-described light source device, the light source side optical system 140, a display element 51 that generates a projection image, a projection side optical system 220 that projects the projection image, and a projector control unit. is there.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of the projector 10. In this embodiment, left and right in the projector 10 indicate the left and right direction with respect to the projection direction, and front and rear indicate the screen side direction of the projector 10 and the front and rear direction with respect to the traveling direction of the light beam.

  As shown in FIG. 1, the projector 10 has a substantially rectangular parallelepiped shape, and has a lens cover 19 that covers the projection port on the side of the front panel 12 that is a front side plate of the projector housing. The panel 12 is provided with a plurality of intake holes 18. Further, although not shown, an Ir receiver for receiving a control signal from the remote controller is provided.

  In addition, a key / indicator unit 37 is provided on the top panel 11 of the housing. The key / indicator unit 37 switches a power switch key, a power indicator for notifying power on / off, and switching on / off of projection. Keys and indicators such as an overheat indicator for notifying when a projection switch key, a light source unit, a display element, a control circuit, etc. are overheated are arranged.

  In addition, on the rear surface of the housing, there are provided various terminals 20 such as an input / output connector section and a power adapter plug that provide a USB terminal, a D-SUB terminal for image signal input, an S terminal, an RCA terminal, etc. on the rear panel. Yes. In addition, a plurality of intake holes are formed in the back panel. A plurality of exhaust holes 17 are formed in each of the right panel, which is a side plate of the housing (not shown), and the left panel 15, which is the side plate shown in FIG. An intake hole 18 is also formed at a corner near the back panel of the left panel 15. Further, a plurality of intake holes or exhaust holes are also formed in the vicinity of the front, back, left and right panels of the lower panel (not shown).

  Next, projector control means of the projector 10 will be described with reference to the block diagram of FIG. The projector control means includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like. Image signals of various standards input from the input / output connector unit 21 are input / output. The image conversion unit 23 converts the image signal into a predetermined format suitable for display via the interface 22 and the system bus (SB), and outputs the image signal to the display encoder 24.

  The display encoder 24 develops and stores the input image signal in the video RAM 25, generates a video signal from the stored contents of the video RAM 25, and outputs the video signal to the display drive unit 26.

  The display drive unit 26 functions as display element control means, and drives the display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal output from the display encoder 24. The light beam emitted from the light source unit 60 is irradiated onto the display element 51 through the light guide optical system, thereby forming an optical image with the reflected light of the display element 51, and a projection side optical system to be described later The image is projected and displayed on a screen (not shown). The movable lens group 235 of the projection side optical system is driven by the lens motor 45 for zoom adjustment and focus adjustment.

  The image compression / decompression unit 31 performs a recording process in which the luminance signal and the color difference signal of the image signal are data-compressed by a process such as ADCT and Huffman coding, and sequentially written in a memory card 32 that is a detachable recording medium. Further, the image compression / decompression unit 31 reads the image data recorded on the memory card 32 in the reproduction mode, decompresses individual image data constituting a series of moving images in units of one frame, and converts the image data into the image conversion unit 23. Is output to the display encoder 24 and the processing for enabling the display of a moving image or the like based on the image data stored in the memory card 32 is performed.

  The control unit 38 controls operation of each circuit in the projector 10, and includes a ROM that stores operation programs such as a CPU and various settings fixedly, and a RAM that is used as a work memory. .

  An operation signal of a key / indicator unit 37 composed of a main key and an indicator provided on the top panel 11 of the housing is directly sent to the control unit 38, and a key operation signal from the remote controller is sent to the Ir receiving unit 35. , And the code signal demodulated by the Ir processor 36 is output to the controller 38.

  Note that an audio processing unit 47 is connected to the control unit 38 via a system bus (SB). The sound processing unit 47 includes a sound source circuit such as a PCM sound source, converts the sound data into analog in the projection mode and the playback mode, and drives the speaker 48 to emit loud sounds.

  Further, the control unit 38 controls a light source control circuit 41 as a light source control means, and the light source control circuit 41 is configured so that light of a predetermined wavelength band required at the time of image generation is emitted from the light source unit 60. The light emission of the excitation light irradiation device, the red light source device, and the blue light source device of the light source unit 60 is individually controlled.

  Further, the control unit 38 causes the cooling fan drive control circuit 43 to perform temperature detection using a plurality of temperature sensors provided in the light source unit 60 and the like, and controls the rotation speed of the cooling fan from the result of the temperature detection. Further, the control unit 38 causes the cooling fan drive control circuit 43 to keep the cooling fan rotating even after the projector body is turned off by a timer or the like, or to turn off the projector body depending on the result of temperature detection by the temperature sensor. Control is also performed.

  Next, the internal structure of the projector 10 will be described. FIG. 3 is a schematic plan view showing the internal structure of the projector 10. As shown in FIG. 3, the projector 10 includes a control circuit board 241 in the vicinity of the right panel 14. The control circuit board 241 includes a power circuit block, a light source control block, and the like. In addition, the projector 10 includes a light source unit 60 on the side of the control circuit board 241, that is, at a substantially central portion of the projector housing. Further, the projector 10 includes an optical system unit 160 between the light source unit 60 and the left panel 15.

  The light source unit 60 includes an excitation light irradiation device 70 disposed in the vicinity of the rear panel 13 at a substantially central portion in the left-right direction of the projector housing, and an optical axis of a light beam emitted from the excitation light irradiation device 70. A fluorescent light emitting device 100 disposed in the vicinity of the front panel 12, a blue light source device 300 disposed in the vicinity of the front panel 12 so as to be parallel to the light bundle emitted from the fluorescent light emitting device 100, and excitation. Red light source device 120 disposed between light irradiation device 70 and fluorescent light emitting device 100, light emitted from fluorescent light emitting device 100, light emitted from red light source device 120, light emitted from blue light source device 300 A light source side optical system 140 that converts the respective axes so as to be the same optical axis and collects each color light at the entrance of the light tunnel 175 that is a predetermined surface.

  The excitation light irradiation device 70 includes an excitation light source 71 arranged so that the optical axis thereof is parallel to the back panel 13, and a reflection mirror group 75 that converts the optical axis of light emitted from the excitation light source 71 by 90 degrees in the direction of the front panel 12. And a condensing lens 78 that condenses the light emitted from the excitation light source 71 reflected by the reflection mirror group 75, and a heat sink 81 disposed between the excitation light source 71 and the right panel 14.

  The excitation light source 71 includes a total of 24 blue laser diodes in 3 rows and 8 columns arranged in a matrix. On the optical axis of each blue laser diode, the light emitted from each blue laser diode is converted into parallel light. A collimator lens 73, which is a condenser lens, is disposed. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a stepped manner, and reduces the cross-sectional area of the light beam emitted from the excitation light source 71 in one direction and emits it to the condensing lens 78.

  A cooling fan 261 is disposed between the heat sink 81 and the back panel 13, and the excitation light source 71 is cooled by the cooling fan 261 and the heat sink 81. Further, a cooling fan 261 is also disposed between the reflection mirror group 75 and the back panel 13, and the reflection mirror group 75 and the condenser lens 78 are cooled by the cooling fan 261.

  The fluorescent light emitting device 100 is arranged so as to be parallel to the front panel 12, that is, the fluorescent wheel 101 disposed so as to be orthogonal to the optical axis of the emitted light from the excitation light irradiation device 70, and the fluorescent wheel 101 is rotationally driven. And a condensing lens group 111 that condenses the light bundle emitted from the fluorescent wheel 101 toward the rear panel 13.

  The fluorescent wheel 101 is a disk-shaped metal substrate, and an annular fluorescent light emitting region that emits fluorescent light in the green wavelength band using the light emitted from the excitation light source 71 as excitation light is formed as a recess, and the excitation light And functions as a fluorescent plate that emits fluorescence. In addition, the surface of the fluorescent light wheel 101 including the fluorescent light emitting region on the side of the excitation light source 71 is mirror-processed by silver deposition or the like to form a reflective surface that reflects light, and a green phosphor layer is formed on the reflective surface. It is laid.

  The light emitted from the excitation light irradiating device 70 applied to the green phosphor layer of the fluorescent wheel 101 excites the green phosphor in the green phosphor layer, and the light bundle is emitted in all directions from the green phosphor. Is emitted directly to the excitation light source 71 side or after being reflected by the reflection surface of the fluorescent wheel 101 to the excitation light source 71 side. Moreover, the excitation light irradiated to the metal substrate without being absorbed by the phosphor of the phosphor layer is reflected by the reflecting surface and is incident on the phosphor layer again to excite the phosphor. Therefore, by using the surface of the concave portion of the fluorescent wheel 101 as a reflective surface, the utilization efficiency of the excitation light emitted from the excitation light source 71 can be increased, and the light can be emitted more brightly.

  In the excitation light reflected on the phosphor layer side by the reflecting surface of the fluorescent wheel 101, the excitation light emitted to the excitation light source 71 side without being absorbed by the phosphor passes through a first dichroic mirror 141 described later. Since the fluorescent light is reflected by the first dichroic mirror 141, the excitation light is not emitted to the outside. A cooling fan 261 is disposed between the wheel motor 110 and the front panel 12, and the fluorescent wheel 101 is cooled by the cooling fan 261.

  The red light source device 120 includes a red light source 121 disposed so that the optical axis is parallel to the excitation light source 71, and a condensing lens group 125 that condenses the light emitted from the red light source 121. The red light source device 120 is disposed so that the optical axis intersects the light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescent wheel 101. The red light source 121 is a red light emitting diode as a semiconductor light emitting element that emits red wavelength band light. Furthermore, the red light source device 120 includes a heat sink 130 disposed on the right panel 14 side of the red light source 121. A cooling fan 261 is disposed between the heat sink 130 and the front panel 12, and the red light source 121 is cooled by the cooling fan 261.

  The blue light source device 300 includes a blue light source 301 disposed so as to be parallel to the optical axis of the light emitted from the fluorescent light emitting device 100, and a condenser lens group 305 that collects the light emitted from the blue light source 301. Prepare. The blue light source device 300 is arranged so that the light emitted from the red light source device 120 and the optical axis intersect. The blue light source 301 is a blue light emitting diode as a semiconductor light emitting element that emits light in a blue wavelength band. Furthermore, the blue light source device 300 includes a heat sink 310 disposed on the front panel 12 side of the blue light source 301. A cooling fan 261 is disposed between the heat sink 310 and the front panel 12, and the blue light source 301 is cooled by the cooling fan 261.

  The light source side optical system 140 is a condensing lens that condenses the light bundles in the red, green, and blue wavelength bands, a dichroic mirror that converts the optical axes of the light bundles in the respective color wavelength bands into the same optical axis, etc. Consists of. Specifically, the optical axis of the blue wavelength band light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescent wheel 101, and the optical axis of the red wavelength band light emitted from the red light source device 120 The first dichroic mirror 141 that transmits the blue and red wavelength band light, reflects the green wavelength band light, and converts the optical axis of the green light by 90 degrees toward the left panel 15 is disposed at the position where ing.

  Further, the blue wavelength band light is transmitted at a position where the optical axis of the blue wavelength band light emitted from the blue light source device 300 and the optical axis of the red wavelength band light emitted from the red light source device 120 intersect, A second dichroic mirror 148 that reflects green and red wavelength band light and converts the optical axes of the green and red light in the direction of the rear panel 13 by 90 degrees is disposed. A condensing lens is disposed between the first dichroic mirror 141 and the second dichroic mirror 148. Further, in the vicinity of the light tunnel 175, a condenser lens 173 that condenses the light source light at the entrance of the light tunnel 175 is disposed.

  The optical system unit 160 includes an illumination side block 161 located on the left side of the excitation light irradiation device 70, an image generation block 165 located near a position where the back panel 13 and the left panel 15 intersect, and a light source side optical system. The projection-side block 168 located between the 140 and the left panel 15 is configured in a substantially U-shape.

  The illumination side block 161 includes a part of a light guide optical system 170 that guides the light source light emitted from the light source unit 60 to the display element 51 provided in the image generation block 165. The light guide optical system 170 included in the illumination side block 161 includes a light tunnel 175 that uses a light beam emitted from the light source unit 60 as a light flux having a uniform intensity distribution, and a light collecting unit that collects light emitted from the light tunnel 175. There are an optical lens 178, an optical axis conversion mirror 181 that converts the optical axis of the light beam emitted from the light tunnel 175 in the direction of the image generation block 165, and the like.

  As the light guide optical system 170, the image generation block 165 has a condensing lens 183 that condenses the light source light reflected by the optical axis conversion mirror 181 on the display element 51, and a light beam transmitted through the condensing lens 183 as a display element. And an irradiation mirror 185 that irradiates 51 at a predetermined angle. Further, the image generation block 165 includes a DMD serving as the display element 51, and a heat sink 190 for cooling the display element 51 is disposed between the display element 51 and the rear panel 13. Element 51 is cooled. Further, a condensing lens 195 as the projection-side optical system 220 is disposed in the vicinity of the front surface of the display element 51.

  The projection-side block 168 has a lens group of the projection-side optical system 220 that emits ON light reflected by the display element 51 to the screen. The projection-side optical system 220 includes a fixed lens group 225 built in a fixed lens barrel and a movable lens group 235 built in a movable lens barrel, and is a variable focus lens having a zoom function, and is movable by a lens motor. Zoom adjustment and focus adjustment can be performed by moving the lens group 235.

  The excitation light source 71 in the light source device has a total of 24 blue laser diodes in 3 rows and 8 columns arranged in a matrix as described above, and is composed of a total of 6 blue laser diodes in 3 rows and 2 columns. The four adjustment units 400 are arranged in parallel. Here, a specific configuration of the adjustment unit 400 for adjusting the position of each collimator lens 73 will be described in detail with reference to the drawings.

  4 is a perspective view of the adjustment unit 400 after completion of adjustment, FIG. 5 is a view as seen from the light emitting surface side of the adjustment unit 400 after completion of adjustment, and FIG. 6 is a lens frame hole of the adjustment unit 400. FIG. 7 is a cross-sectional view of the AA plane shown in FIG. 5 linking the center of 79b, and FIG. 7 is a cross-sectional view of the adjustment unit 400 shown in FIG. The adjustment unit 400 will be described with the light emitting surface side as the upper side, the rear holder 80 side as the lower side, and the optical axis direction as the vertical direction as shown in FIG.

  As shown in FIGS. 4 and 7, the adjustment unit 400 includes a collimator lens 73 as a condenser lens, a lens mounting frame 74, an excitation light source 71, a light source holder 79, a rear holder 80, and a temporary holding plate. A lens mounting frame presser 88 and a presser plate 89 are provided.

  The collimator lens 73 is a condensing lens that converts light emitted from the blue laser diode, which is the excitation light source 71, into parallel light. The lens mounting frame 74 is integrated with the collimator lens 73 in advance, and is a mounting frame fixed to the periphery of the collimator lens 73 with an adhesive or the like as shown in FIGS. The position adjustment of the collimator lens 73 can be prevented by damaging the lens itself by pressing and moving the periphery of the lens mounting frame 74 that is fixed by bonding the periphery of the collimator lens 73 with an adhesive or the like. .

  The light source holder 79 is a heat resistant resin light source holding member, and a lens mounting frame 74 integrated with a collimator lens 73 as a condenser lens while covering the excitation light source 71 as shown in FIG. It is disposed in the lens frame hole 79b and is held so as to be movable within an adjustable range in a direction orthogonal to the optical axis. Further, as shown in FIG. 6, the light source holder 79 is provided on the upper peripheral edge of the lens mounting frame 74 so that the lens mounting frame 74 disposed in the lens frame hole 79b does not move downward along the optical axis. It has a structure that receives the protruding part. Then, the lens mounting frame 74 is clamped from above by a lens mounting frame presser 88, which will be described later, so as not to move upward along the optical axis during adjustment. .

  Further, after the adjustment, the lens mounting frame 74 is sandwiched from above the lens mounting frame retainer 88 by a retainer plate 89 which is a lens mounting frame retainer plate described later, and the adjustment position moves due to secular change or the like. Will be prevented. Further, the light source holder 79 includes an adjusting screw 85 as two adjusting portions for each lens mounting frame 74 as shown in FIG. 4, and a lens as one elastic portion as shown in FIG. A mounting frame locking spring 86 is arranged.

  Then, the lens mounting frame 74 can be moved in one direction orthogonal to the optical axis by rotating the two adjusting screws 85 arranged on the light source holder 79 with an adjusting jig or the like. Then, the moved lens mounting frame 74 is stopped at the moved position by the elastic force of the lens mounting frame locking spring 86.

  Further, as shown in FIGS. 4, 5, and 7, the light source holder 79 has a lens mounting frame that is a locking member for holding a lens mounting frame presser 88 that is a temporary presser plate integrally. A presser foot stop 79a protrudes from the side surface.

  The lens mounting frame presser 88, which is a temporary presser plate, is a U-shaped thin plate metal member as shown in FIG. 7, and is engaged with the lens mounting frame presser stop 79a of the light source holder 79 to thereby provide a light source. It is integrated with the holding body 79 so that the lens mounting frame 74 is not moved in the optical axis direction. The adjustment process, which is the position adjustment of the collimator lens 73, is performed after the lens mounting frame retainer 88 is arranged so that the lens mounting frame 74 does not move in the optical axis direction.

  The presser plate 89 is a thin metal member as shown in FIGS. 6 and 7, and after the above adjustment process is completed, the lens mounting frame 74 to which the collimator lens 73 is fixed has an optical axis due to secular change or the like. It is held so as not to move in a direction perpendicular to the direction and the optical axis. Therefore, the presser plate 89 is arranged so as to cover the lens mounting frame presser 88 which is a temporary presser plate, and the presser plate screw 82 is used to cover the four positions of the light source holder 79 as shown in FIGS. The lens mounting frame 74 is held in the mounting hole.

  The rear holder 80 is a heat radiating member such as aluminum, and is a member that receives the package of the excitation light source 71 electrically connected by the flexible substrate 90 as shown in FIGS. The rear holder 80 and the light source holder 79 are integrated by being stopped by a rear holder screw 87 described later.

  Here, the adjustment screw 85 that is an adjustment portion disposed on the light source holder 79 and the lens mounting frame locking spring 86 that is an elastic portion will be described in detail with reference to the drawings. 8 is a view of the adjustment unit 400 before the position adjustment of the collimator lens 73 as seen from the light emitting surface side, FIG. 9 is a side view in FIG. 8, and FIG. 10 is a lens frame hole 79b and a lens frame hole. It is sectional drawing of the CC plane in FIG. 8 used as the intermediate | middle with 79b.

  The adjustment unit 400 will be described with the light emitting surface side as the upper side, the rear holder 80 side as the lower side, and the optical axis direction as the vertical direction as shown in FIG. In FIG. 8, the left column includes a lens mounting frame 74 integrated with the collimator lens 73 in order to explain the pressing position by the adjusting screw 85 and the locking position of the lens mounting frame locking spring 86. There is no state. 9 and 10 also show that the lens mounting frame 74 is not incorporated in the left column.

  As shown in FIG. 8, the adjustment screw 85 has a collimator on the upper stage so that the lens mounting frame 74 in which the collimator lens 73 is integrated can be moved in a direction perpendicular to the optical axis of the collimator lens 73. Centering on the lens frame hole 79b, which is the center of the lens 73, the intersection angle at the center of the optical axis at the upper right and upper left of the lens frame hole 79b, which is the left and right of the opposing position of the lens mounting frame locking spring 86 Are arranged at positions of 90 degrees. Further, in the lower stage, the adjustment screw 85 is centered on the lens frame hole 79b that is the center of the arrangement position of the collimator lens 73, and the lower right of the lens frame hole 79b that is the left and right of the position opposite to the lens mounting frame locking spring 86. In addition, they are arranged at two positions on the lower left where the intersection angle at the center of the optical axis is 90 degrees.

  The adjustment screw 85 has been described with the intersection angle at the center of the optical axis being 90 degrees. However, the adjustment screw 85 is not limited to this, and the adjustment screw 85 can be easily adjusted if it is arranged in a balanced manner at about 90 to 120 degrees. be able to.

  As shown in FIGS. 8 and 9, the adjustment screw 85 has grooves so as to be rotatable, and the adjustment screw 85 is rotated at two places by using an adjustment jig such as a flat-blade screwdriver. Thus, the lens mounting frame 74 can be moved toward the center of the optical axis and can be freely moved in a direction orthogonal to the optical axis.

  As shown in FIG. 8, the lens mounting frame locking spring 86 which is an elastic portion is a thin plate-like spring member, and a hemispherical locking member is provided at a portion where the lens mounting frame 74 is locked. As for the locking position of the lens mounting frame locking spring 86, the angle between the two points of the pressing position by the adjusting screw 85 and the locking position of the lens mounting frame locking spring 86 and the optical axis center are the same. It is provided at the correct position. Accordingly, the lens mounting frame 74 that moves by rotating the adjusting screw 85 is stopped at the moved position by the elastic force of the lens mounting frame locking spring 86.

  Further, as shown in FIG. 8, the lens mounting frame locking springs 86 are concentrated in the center of the adjustment unit 400 as viewed from above, so that the lens mounting frame locking of the adjacent lens mounting frames 74 is achieved. Two of the springs 86 can be combined together.

  The rear holder 80, which is a member positioned below the adjustment unit 400 and receives the package of the excitation light source 71 on its lower surface, inserts a rear holder screw 87 into a mounting hole provided in the center of the lower surface as shown in FIG. By fixing to the holding body 79, the light source holding body 79 is integrated.

  The adjustment unit 400 provided with such an adjustment portion and an elastic portion incorporates each lens mounting frame 74 in which the collimator lens 73 is housed and fixed, and is a temporary presser plate from above as shown in FIGS. By locking the lens mounting frame retainer 88 to the lens mounting frame retainer stop 79a of the light source retaining body 79, the lens mounting frame retainer 88 is integrated with the light source retaining body 79. The position of the collimator lens 73 can be adjusted in a direction orthogonal to the direction.

  As described above, according to the present invention, the light source holder 79 has the adjustment unit that can move the lens mounting frame 74 in a direction orthogonal to the optical axis of the collimator lens 73 that is a condenser lens, and the adjustment unit. It is possible to provide a light source device that adjusts the position of the collimator lens 73 by using an elastic portion that holds the movement of the lens mounting frame 74, and the projector 10 that suppresses uneven illuminance and variations in brightness by using the light source device. it can.

  Further, according to the present invention, the adjustment screw 85 is not limited to two in the direction orthogonal to the optical axis of the collimator lens 73, and a plurality of adjustment screws 85 are provided so that the collimator lens 73 as a condensing lens is opposed to the optical axis. Can be freely moved in the orthogonal direction, and adjustment can be performed efficiently.

  Then, according to the present invention, the adjusting screw 85 is centered on the lens frame hole 79b where the collimator lens 73 is disposed, and the right and left sides of the lens frame hole 79b on the left and right of the opposing position of the lens mounting frame locking spring 86. The lens frame holes 79b are arranged at two positions at positions where the crossing angle at the center of the lens frame hole 79b is 90 degrees. The locking position of the lens mounting frame locking spring 86 is a position pressed by the adjusting screw 85. And the mounting position of the lens mounting frame locking spring 86 and the angle connecting the center of the optical axis are the same. Adjustments can be made in a well-balanced manner in a direction orthogonal to the axis.

  The arrangement of the two adjusting screws 85 is not limited to 90 degrees at the center of the lens frame hole 79b, but the center of the lens mounting frame locking spring 86, which is an elastic member, and the center of the lens frame hole 79b. If it is arranged in a balanced manner from 90 degrees to 120 degrees symmetrically with respect to the straight line to be connected, it can be adjusted freely.

  According to the present invention, the light source device of the projector 10 causes the lens mounting frame 74 to abut on the receiving surface of the light source holder 79 and is clamped by the lens mounting frame holder 88, whereby the collimator lens 73 is in the optical axis direction. Since this position is fixed, an efficient adjustment limited to a direction orthogonal to the optical axis can be performed.

  Further, according to the present invention, the light source device of the projector 10 is a presser plate that is a lens mounting frame presser plate that is integrated with the light source holder 79 from above the lens mounting frame presser 88 after the adjustment by the adjusting screw 85 is completed. Since 89 is further provided, it is possible to prevent illuminance unevenness or the like caused by movement of the collimator lens 73 due to secular change.

  Further, according to the present invention, since the lens mounting frame locking spring 86 is continuously arranged so as to hold the plurality of lens mounting frames 74, it is possible to reduce the number of parts and reduce the cost.

  The present invention is not limited to the above embodiments, and can be freely changed and improved without departing from the gist of the invention. For example, the present invention can also be applied to the position adjustment of the condenser lens of the red light source device 120 and the blue light source device 300 other than the excitation light source.

10 Projector
11 Top panel 12 Front panel
13 Rear panel 14 Right panel
15 Left panel 17 Exhaust hole
18 Air intake hole 19 Lens cover
20 Various terminals 21 Input / output connector
22 I / O interface 23 Image converter
24 Display encoder 25 Video RAM
26 Display drive unit 31 Image compression / decompression unit
32 Memory card 35 Ir receiver
36 Ir processing section 37 Key / indicator section
38 Control unit 41 Light source control circuit
43 Cooling fan drive control circuit 45 Lens motor
47 Audio processor 48 Speaker
51 Display element
60 Light source unit 70 Excitation light irradiation device
71 Excitation light source 73 Collimator lens
74 Lens mounting frame 75 Reflective mirror group
78 Condenser lens 79 Light source holder
79a Lens mount frame retainer stopper 79b Lens frame hole
80 Rear holder
81 Heat sink 82 Presser plate screw
85 Adjusting screw 86 Lens mounting frame locking spring
87 Rear holder screw 88 Lens frame holder
89 Presser plate
90 Flexible substrate 100 Fluorescent light emitting device
101 Fluorescent wheel 110 Wheel motor
111 Condensing lens group
120 Red light source 121 Red light source
125 condenser lens group 130 heat sink
140 Light source side optical system 141 First dichroic mirror
148 Second dichroic mirror 160 Optical system unit
161 Lighting block 165 Image generation block
168 Projection side block 170 Light guiding optical system
173 Condensing lens 175 Light tunnel
178 Condensing lens 181 Optical axis conversion mirror
183 Condensing lens 185 Irradiation mirror
190 Heat sink 195 Condenser lens
220 Projection-side optical system 225 Fixed lens group
235 Movable lens group 241 Control circuit board
261 Cooling fan 300 Blue light source device
301 Blue light source 305 Condensing lens group
310 heat sink 400 adjustment unit

Claims (8)

A condenser lens that increases the directivity of light emitted from the light source;
A lens mounting frame for holding the outer periphery of the condenser lens;
A light source holding body that holds the lens so as to cover a circumferential portion of the light source, and holds the lens mounting frame movably in a direction orthogonal to the optical axis of the condenser lens on the light emitting portion side of the light source,
A temporary presser plate that holds the lens mounting frame with the light source holder so as not to move in the optical axis direction of the condenser lens;
Have
The light source holder includes an adjustment unit that can move the lens mounting frame in a direction orthogonal to the optical axis of the condenser lens, and an elastic unit that holds the movement of the lens mounting frame by the adjustment unit; A light source device comprising:   The light source device according to claim 1, wherein a plurality of the adjustment units are provided in a direction orthogonal to the optical axis of the condenser lens.   The plurality of adjustment portions are disposed so as to contact an outer periphery of the lens mounting frame, and are disposed at positions facing the elastic portions contacting the outer periphery of the lens mounting frame. Light source device.   The adjustment unit is provided at two locations, and both the adjustment units are arranged at a position where the angle at the center of the lens frame hole of the light source holder that arranges the lens mounting frame is 90 degrees to 120 degrees. The light source device according to claim 2, wherein:   The position of the condensing lens in the optical axis direction is fixed by bringing the lens mounting frame into contact with the receiving surface of the light source holder and holding the lens mounting frame with the temporary holding plate. Item 5. The light source device according to any one of Items 4.   The light source device according to claim 1, further comprising a lens mounting frame pressing plate that is integrated with the light source holding body from above the temporary pressing plate.   The light source device according to claim 1, wherein the elastic portion is continuously provided so as to hold a plurality of the lens mounting frames. A light source device;
A light source side optical system;
A display element for generating a projection image;
A projection-side optical system that projects a projection image;
Projector control means;
With
The projector according to claim 1, wherein the light source device is the light source device according to claim 1.

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