JP2014123028A - Optical element fixing device, projector including the optical element fixing device, and angle adjustment method of optical element by the optical element fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical element fixing device capable of easily adjusting an angle of an optical element, a projector including the optical element fixing device, and an angle adjustment method of the optical element by the optical element fixing device.SOLUTION: An optical element fixing device includes: an optical element support body 520 for supporting the optical element; and a fixing frame 510 connected to the optical element support body 520. The optical element support body 520 includes: a support part 521 for supporting the optical element; an inclination angle adjustment part 522 protruding at the back surface of the support part 521; and a substrate part 523 which is connected to the support part 521 by a thin wall part 524 and has a reference columnar part 525 performing positioning to the fixing frame 510. The fixing frame 510 includes: a positioning hole in which the reference column part 525 is inserted; a fixing screw hole which is made a long hole with the positioning hole as a center in the vicinity of the positioning hole and fixing the substrate part 523 to the fixing frame 510; and an adjustment hole which is made a long hole with the positioning hole as the center in the vicinity of the positioning hole and making an adjustment screw which is screwed into the inclination angle adjustment part penetrate.

Description

  The present invention relates to an optical element fixing device, a projector including the optical element fixing device, and a method of adjusting an angle of the optical element by the optical element fixing device.

  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 condenses the light emitted from the light source with a lens, reflects it with a mirror, condenses it on a micromirror display element called a DMD (digital micromirror device) or a liquid crystal plate, and places it on the screen. A color image is displayed.

  In a general projector using a DMD, light emitted from a light source device via a predetermined optical system needs to be reflected by a mirror of a mirror fixing device disposed immediately before the DMD, and accurately irradiated to the DMD. Therefore, it is necessary to adjust the mirror angle with high accuracy.

  In a conventional mirror fixing device for a projector, a movable member with a mirror attached to a frame fixed to the casing side is a spherical support and three adjustments arranged in three directions around the spherical support. The angle is supported by screws. When adjusting the angle of the mirror, the angle of the mirror is adjusted by rotating the three adjusting screws forward or backward with a jig such as a screwdriver from the outside of the housing.

  For example, as a holding member for a reflecting mirror that irradiates light to a DMD serving as a light modulation unit, Patent Document 1 discloses at least three places surrounding a pivoting portion that pivots the holding member of the reflecting mirror in a plurality of directions. An adjusting device having means for adjusting the distance between the holding member and the fixing member is disclosed.

JP 2004-233688 A

  However, in the projector capable of adjusting the angle of the mirror by the adjusting screws as the three adjusting means, the three adjusting screws arranged around the pivotal support are adjusted obliquely with respect to the DMD. In a mirror fixing device that reflects light toward a DMD from a certain lower side, when one screw is tightened, it is necessary to adjust the other screw, and the reflected light is correctly applied to the DMD by three adjustment screws. In order to make such adjustments, labor and time are required, and there is a drawback that productivity efficiency cannot be improved.

  The present invention has been made in view of the above-described problems of the prior art, and includes an optical element fixing device and an optical element fixing device that can easily adjust the angle of an optical element with a simple configuration. An object of the present invention is to provide a projector and a method of adjusting an angle of an optical element by an optical element fixing device.

  An optical element fixing device according to the present invention includes an optical element support that supports an optical element, and a fixing frame that is coupled to the optical element support, and the optical element support supports the optical element. A substrate part having a support part, an inclination angle adjustment part having an inclination angle adjustment screw hole on the back surface of the support part, and a reference column part connected to the support part by a thin part and positioning with respect to the fixed frame The fixing frame is a positioning hole into which the reference cylindrical portion is inserted, and is a long hole around the positioning hole in the vicinity of the positioning hole to fix the substrate portion to the fixing frame. A fixing screw hole, and an adjustment hole that is an elongated hole centering on the positioning hole and passes through an adjusting screw that is screwed into the inclination angle adjusting screw hole in the vicinity of the positioning hole. .

  The projector according to the present invention includes a light source device, a display element that forms an optical image with light from the light source device, a light source side optical system that guides and radiates light from the light source device to the display element, A projection-side optical system that projects an optical image formed by the display element onto a screen; and a projector control unit that controls the light source device and the display element. An optical element fixing device is included.

  An optical element angle adjusting method by the optical element fixing device according to the present invention is an optical element angle adjusting method by the optical element fixing device according to the present invention, wherein the optical element is fixed to the optical element support. A fixing step, a step of inserting the reference column portion of the optical element support into the positioning hole of the fixed frame, and a rotation angle of the optical element support by rotating the optical element support around the reference column portion. A first adjusting step for adjusting; a step of screwing a screw into the adjusting elongated hole portion to fix the fixing frame and the optical element support; an adjustment screw passing through the adjusting hole; And a second adjustment step of adjusting the tilt angle of the optical element by screwing into the adjustment screw hole.

  According to the present invention, an optical element fixing device capable of easily adjusting the angle of the optical element with a simple configuration, a projector including the optical element fixing device, and an angle adjusting method of the optical element by the optical element fixing device. Can be provided.

1 is an external perspective view showing a projector according to an embodiment of the invention. It is a figure which shows the functional block of the projector which concerns on embodiment 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 the upper surface perspective view which expanded the principal part of the mirror fixing device as an optical element fixing device of the projector which concerns on embodiment of this invention. It is a bottom perspective view of a fixed frame before attaching an irradiation mirror of a mirror fixing device according to an embodiment of the present invention. It is a bottom perspective view of a fixed frame after attaching an irradiation mirror of a mirror fixing device according to an embodiment of the present invention. It is a perspective view of the optical element support body which concerns on embodiment of this invention. It is a perspective view of the optical element support body which concerns on embodiment of this invention. It is a perspective view of the optical element support body which concerns on embodiment of this invention. It is sectional drawing of the optical element support body which concerns on embodiment of this invention. It is sectional drawing of the optical element support body at the time of the inclination which concerns on embodiment of this invention. It is a perspective view for demonstrating the groove | channel or protrusion provided in the reference | standard cylinder part which concerns on embodiment of this invention.

  Hereinafter, modes for carrying out the present invention will be described. FIG. 1 is an external perspective view of the projector 10. In the present 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.

  Next, projector control means of the projector 10 will be described with reference to the functional 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.

  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. .

  Then, the image signal of various standards input from the input / output connector unit 21 by the projector control means is in a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). After being converted so as to be unified into an image signal, it is output 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. Is. Then, the projector 10 irradiates the light beam emitted from the light source unit 60 to 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 described later. An image is projected and displayed on a screen (not shown) via the side optical system 220. The movable lens group 235 of the projection side optical system 220 is driven by the lens motor 45 for zoom adjustment and focus adjustment.

  Further, 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 are sequentially written in a memory card 32 which 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 each image data constituting a series of moving images in units of one frame, and converts the image data into an image conversion Based on the image data that is output to the display encoder 24 via the unit 23 and stored in the memory card 32, processing for enabling display of a moving image or the like is performed.

  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 source unit, the red light source device, and the blue light source device in the green 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 is emitted from the excitation light source unit 70 as a green light source device as a green light source device that is a light source device that is disposed in the vicinity of the rear panel 13 at a substantially central portion in the left-right direction of the projector housing. Fluorescent light emitting unit 100 disposed on the optical axis of the light bundle and in the vicinity of the front panel 12, and disposed in the vicinity of the front panel 12 so as to be parallel to the light bundle emitted from the fluorescent light emitting unit 100 Blue light source device 300, red light source device 120 disposed between excitation light source unit 70 and fluorescent light emitting unit 100, emitted light from fluorescent light emitting unit 100, emitted light from red light source device 120, blue light source device 300 And a light guide optical system 140 that guides each color light to the entrance of the light tunnel 175, which is a predetermined surface, so that the optical axes of the light emitted from each light are the same.

  The excitation light source unit 70 includes an excitation light source 71 that is an element for a light source such as a laser element arranged so that the optical axis is parallel to the rear panel 13, and the optical axis of light emitted from the excitation light source 71 in the direction of the front panel 12. A reflection mirror group 75 that converts 90 degrees, a condenser 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 that is disposed between the excitation light source 71 and the right panel 14. And comprising.

  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.

  Two cooling fans 261 are 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 unit 100 in the green light source device is arranged to be parallel to the front panel 12, that is, to be orthogonal to the optical axis of the light emitted from the excitation light source unit.

  Then, the light emitted from the excitation light source unit 70 irradiated on the green phosphor layer of the fluorescent light emitting unit 100 excites the green phosphor in the green phosphor layer, and the light flux emitted in all directions from the green phosphor. Is directly emitted to the excitation light source 71 side.

  In the excitation light reflected on the phosphor layer side by the reflecting surface of the fluorescent light emitting unit 100, the excitation light emitted to the excitation light source 71 side without being absorbed by the phosphor is a part of the green light source device. Since the fluorescent light passes through one dichroic mirror 141 and is reflected by the first dichroic mirror 141, the excitation light is not emitted outside.

  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 arranged such that the light axis from the excitation light source unit 70 and the green wavelength band light emitted from the fluorescent light emitting unit 100 intersect with the optical axis. 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 light emitted from the fluorescent light emitting unit 100, and a condensing lens group 305 that collects 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 guide 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 source unit 70 and the green wavelength band light emitted from the fluorescent light emitting unit 100, 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 source unit 70, an image generation block 165 located near the position where the back panel 13 and the left panel 15 intersect, and the light guide optical system 140. And the projection side block 168 located between the left side panel 15 and the left side panel 15 are formed in a substantially U-shape.

  The illumination side block 161 includes a part of the light source side 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 source side 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 source side optical system 170, the image generation block 165 includes a condenser 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 that has passed through the condenser lens 183 as a display element. And an irradiation mirror 185 that is a reflection mirror 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 irradiation mirror 185, the condensing lens 195, the display element 51, and the like in the image generation block 165 are arranged inside a box-shaped housing. The image generation block 165 has a fixed frame located on the bottom surface of the casing, and the irradiation mirror 185 is fixed on the fixed frame.

  The projector 10 according to the embodiment of the present invention includes the mirror fixing device 500 that can easily adjust the angle of the irradiation mirror 185 on the fixed frame. A detailed description of the mirror fixing device 500 will be described later.

  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 type lens having a zoom function. Zoom adjustment and focus adjustment can be performed by moving the lens group 235.

  Next, the mirror fixing device 500 that can easily adjust the angle of the irradiation mirror 185 of the projector 10 of the present invention will be described in detail. FIG. 4 is an enlarged perspective view of a main part of a mirror fixing device 500 as an optical element fixing device of the projector 10. FIG. 5 is a bottom perspective view of the image generation block 165 and the like including the fixed frame before the irradiation mirror 185 of the mirror fixing device 500 is attached. FIG. 6 is a bottom perspective view showing the periphery of the image generation block 165 after the irradiation mirror 185 of the mirror fixing device 500 is attached. FIG. 7 is a perspective view of the optical element support 520 to which the irradiation mirror 185 is attached.

  The projector 10 according to the embodiment of the present invention includes a mirror fixing device 500 including an irradiation mirror 185 as an optical element in an image generation block 165. As shown in FIGS. 3 and 4, the irradiation mirror 185 of the mirror fixing device 500 is emitted from the light source unit 60, and includes a condenser lens 173, a light tunnel 175, a condenser lens 178, an optical axis conversion mirror 181, and a condenser lens. The light transmitted through 183 and the like is reflected to irradiate the display element 51, which is a DMD, at a predetermined angle.

  As shown in FIGS. 4 and 7, the irradiation mirror 185 is supported by being fixed to the support portion 521 of the optical element support 520 by adhesion or the like, and the optical element support 520 is supported in the image generation block 165. The rotation angle, which is a yawing angle on the surface of the fixed frame 510, and the tilt angle, which is an inclination angle, are adjusted temporarily and fixed to the fixed frame 510.

  As shown in FIGS. 5 and 6, the fixed frame 510 is a plate-like body made of metal such as aluminum constituting the bottom plate of the image generation block 165, and an optical element support 520 is described later on the plate-like body. When connecting the reference cylinder hole 512, which is a positioning hole into which the reference cylinder can be inserted, and the substrate portion of the optical element support 520, a fixed screw hole that can be attached with screws 553, 554 so that the rotation can be adjusted. In the vicinity of the adjustment long hole portion 513, 514 and the reference cylinder hole portion 512, a long hole is formed along the circumference centering on the reference cylinder hole portion 512, and the inclination angle adjustment of the optical element support 520 described later is adjusted. And an adjustment hole 515 that allows the adjustment angle of the tilt angle to be adjusted by the tightening degree of the adjustment screw 555.

  The reference column hole 512 is a positioning hole for placing the optical element support 520 in the fixed frame 510 at the reference position before adjustment.

  The adjustment long hole portions 513 and 514 are long holes extending in the circumferential direction provided at two locations opened at approximately 160 degrees at equidistant positions as the center of the reference cylindrical hole portion 512. Then, the adjustment elongated hole portions 513 and 514 are elongated holes so that the optical element support 520 disposed in the fixed frame 510 can be adjusted by rotating in the horizontal direction around the reference cylindrical portion 525. 553 and 554 can be attached (fixed).

  The adjustment hole 515 is a long hole that is substantially equidistant from the two adjustment long hole portions 513 and 514 and extends in the circumferential direction around the center of the reference cylindrical hole portion 512. The adjustment hole 515 that is a long hole is adjusted within the range of the long hole even after the optical element support 520 disposed on the fixed frame 510 is rotated in the horizontal direction. Thus, the optical element support 520 can be screwed into the tilt angle adjusting portion.

  The optical element support 520 is made of a metal such as aluminum, and as shown in FIGS. 7 to 9, is integrated with the support part 521 and the support part 521 for standingly fixing the irradiation mirror 185 as an optical element. The tilt angle adjustment unit 522 that can adjust the tilt angle of the irradiation mirror 185, the substrate unit 523 that is the base of the support unit 521, and the thin-walled unit 524 that is the connection unit between the substrate unit 523 and the support unit 521 are fixed. When connecting the frame 510 and the optical element support 520, the reference cylindrical portion 525 serving as a reference for the mounting position, the screw holes 526 and 527 to be connected (fixed) to the fixed frame 510, and the adjustment screw 555 can be loosely inserted. And a hole 528 to be penetrated through.

  The support portion 521 is a plate-like standing portion of the optical element support 520, and fixes the irradiation mirror 185 on one surface.

  The inclination angle adjustment unit 522 has a substantially quadrangular prism shape provided so as to protrude from the back surface different from the fixed surface of the irradiation mirror 185 of the support unit 521, and the adjustment screw 555 so as to penetrate substantially the center in the axial direction. A screw hole (inclination angle adjusting screw hole) 522a is formed.

  The substrate part 523 is a plate-like base part in the optical element support 520, and is integrated with the upright support part 521 with a certain inclination angle, and the substrate part 523 and one side of the support part 521 The connecting portion is made thin to form a thin portion 524. In addition, a reference column portion 525 that protrudes in a columnar shape and is inserted through and fitted into a reference column hole 512 of the fixed frame 510 is integrated with the bottom surface of the substrate portion 523.

  Further, the substrate portion 523 is provided with screw holes 526 and 527 that are fixed to the fixed frame 510 after adjusting the rotation angle of the irradiation mirror 185 in the vicinity of the reference cylindrical portion 525. In addition, the substrate portion 523 is provided with a hole 528 that is a hollow hole through which the adjustment screw 555 for adjusting the tilt angle of the irradiation mirror 185 passes on the same axis as the screw hole 522a of the inclination angle adjustment unit 522.

  Then, as shown in FIG. 10, the optical element support 520 is placed in the fixed frame 510, and when screws 555 are screwed into the adjustment holes 515 of the fixed frame 510, the screws 555 are supported by the optical element. When reaching the screw hole 522a provided in the inclination angle adjustment part 522 of the body 520 and further tightening the screw, the support part 521 is inclined backward with the thin part 524 as a hinge as shown in FIG. Thus, the tilt angle of the irradiation mirror 185 can be changed.

  In other words, the optical element support 520 that supports the irradiation mirror 185 performs rotation adjustment of the irradiation mirror 185 and is fixed by screwing at two positions, and performs tilt adjustment of the irradiation mirror 185 with one screw tightening condition. To do. As described above, the mirror fixing device 500 is configured such that the angle can be adjusted by screwing screws into three places from the bottom surface side of the fixing frame 510 with a Phillips screwdriver or the like.

  Next, a flow of a manufacturing method of the mirror fixing device 500 that is the above-described optical element fixing device will be described.

  First, a step of fixing the irradiation mirror 185 as an optical element to the inclined surface of the support portion 521 of the optical element support 520 with an adhesive or the like is performed.

  Next, the reference column portion 525 located at the approximate center of the lower surface of the substrate portion 523 below the optical element support 520 to which the irradiation mirror 185 is attached is inserted into the reference column hole 512 of the fixed frame 510, and the fixed frame A step of placing the optical element support 520 in a temporarily fixed state inside is performed.

  Then, for example, a first adjustment process is performed in which the optical element support 520 is rotated around the reference cylindrical portion 525 to adjust the rotation angle while the light source is weakly lit and the DMD irradiation position by reflected light is viewed. When the DMD irradiation position is an appropriate position in the horizontal direction (the yawing direction), screws 553 and 554 are screwed into the adjustment long holes 513 and 514 to fix the irradiation mirror 185, and the fixed frame 510 and the optical element A step of fixing the support 520 is performed.

  Next, in order to adjust the tilt angle of the irradiation mirror 185, while watching the DMD irradiation position by the reflected light, the adjustment screw 555 is screwed into the adjustment hole 515 of the fixed frame 510 so that the DMD irradiation position is in a desired direction. When the proper position is obtained, a second adjustment step is performed in which the screwing of the adjustment screw 555 is stopped at that position.

  Note that the support portion 521 of the optical element support 520 has an elastic force, and even if the support portion 521 is inclined backward by screw tightening with the thin-walled portion 524 as a hinge, The supported portion 521 can be returned in the direction opposite to the inclined direction.

  That is, the angle of the base plate portion 523 and the support portion 521 is integrally formed within the elastic deformation range of the thin portion 524 so that the design tilt angle is approximately at the center of the effective stroke length of screw tightening.

  In addition, the mirror fixing device 500 is provided with two adjustment screw holes 513 and 514, which are two fixing screw holes, for adjusting the rotation direction of the optical element support 520 to which the irradiation mirror 185 is attached. However, as long as the optical element support 520 is securely fixed, any one of the adjustment elongated holes may be fixed with screws.

  Furthermore, although the optical element fixing device using the irradiation mirror 185 as an optical element has been described in the present embodiment, these embodiments are presented as examples and are not intended to limit the scope of the invention. For example, the present invention can be applied to a device that adjusts and fixes an irradiation angle such as a collimator lens or a condenser lens, or a device that adjusts and fixes an irradiation angle of a fluorescent light emitter.

  Further, as shown in FIG. 12, the surface of the reference cylindrical portion 525 on the fixed frame 510 side is provided with, for example, a plus or minus shaped groove 525a or a protrusion 525a, and can be adjusted by rotating with a screwdriver or the like fitted thereto. This is preferable in that the yawing angle can be easily adjusted on the surface of the fixed frame 510 of the mirror fixing device 500.

  As described above, according to the embodiment of the present invention, after adjusting the angle in the horizontal direction (yawing direction), for example, by rotating the optical element support 520 with a simple configuration, the inclination angle is adjusted. An optical element fixing device capable of easily adjusting the angle of the optical element by adjusting an angle (tilt angle) in a direction orthogonal to the surface of the fixed frame 510 by the unit 522, a projector 10 including the optical element fixing device, and The optical element angle adjusting method by the optical element fixing device can be provided.

  In other words, according to the embodiment of the present invention, it is possible to independently adjust the angle in the horizontal direction (yawing direction) and the adjustment of the tilt angle with a simple configuration, and reduce the number of adjustments and time. An element angle adjustment method can be provided.

  Furthermore, according to the embodiment of the present invention, two fixing screw holes are provided in the fixing frame 510 for fixing the optical element support 520 to which the irradiation mirror 185 is attached to the fixing frame 510 after adjusting the rotation direction. By providing certain adjustment elongated holes 513 and 514, the optical element support 520 can be securely fixed to the fixed frame 510.

  In addition, according to the embodiment of the present invention, it is possible to easily adjust the position of the projected image easily by using the optical element as an irradiation mirror.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the first claim of the present application will be appended below.
[1] An optical element support that supports the optical element, and a fixed frame that is coupled to the optical element support,
The optical element support is
A support for supporting the optical element;
An inclination angle adjusting part having an inclination angle adjusting screw hole on the back surface of the support part;
A substrate part connected to the support part and a thin part and having a reference cylindrical part for positioning with respect to the fixed frame,
The fixed frame is
A positioning hole into which the reference cylindrical portion is inserted;
In the vicinity of the positioning hole, a fixing screw hole that is a long hole around the positioning hole and fixes the substrate portion to the fixing frame;
In the vicinity of the positioning hole, an optical element fixing device comprising: an adjustment hole that is an elongated hole centered on the positioning hole and that passes through an adjustment screw that is screwed into the inclination angle adjusting screw hole.
[2] The optical element fixing device according to [1], wherein the reference column portion has a groove or a protrusion for facilitating rotation with respect to the fixed frame surface on a surface on the fixed frame side. .
[3] The optical element fixing device according to [1] or [2], wherein the two fixing screw holes are arranged across the adjustment hole.
[4] The optical element fixing device according to any one of [1] to [3], wherein the optical element is a reflection mirror.
[5] a light source device;
A display element that forms an optical image with light from the light source device;
A light source side optical system that guides and radiates light from the light source device to the display element;
A projection-side optical system that projects an optical image formed by the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The light source side optical system includes the optical element fixing device described in [4] above.
[6] A method of adjusting an angle of an optical element by the optical element fixing device according to any one of [1] to [4],
A fixing step of fixing the optical element to the optical element support;
Inserting the reference cylindrical portion of the optical element support into a positioning hole of the fixed frame;
A first adjustment step of adjusting the rotation angle by rotating the optical element support around the reference cylindrical portion;
Fixing the fixing frame and the optical element support by screwing screws into the adjustment slot,
A second adjustment step of adjusting the tilt angle of the optical element by passing the adjustment screw through the adjustment hole and screwing the adjustment screw into the inclination angle adjustment screw hole;
An optical element angle adjusting method by an optical element fixing device.

DESCRIPTION OF SYMBOLS 10 Projector 11 Top panel 12 Front panel 13 Back panel 14 Right panel 15 Left panel 16 Left panel 16 Bottom panel 17 Exhaust hole 18 Intake hole 19 Lens cover 20 Various terminals 21 Input / output connector part 22 Input / output interface 23 Image conversion part 24 Display encoder 25 Video RAM
26 display drive unit 31 image compression / decompression unit 32 memory card 35 Ir reception unit 36 Ir processing unit 37 key / indicator unit 38 control unit 41 light source control circuit 43 cooling fan drive control circuit 45 lens motor 47 audio processing unit 48 speaker 51 display element
60 light source unit 70 excitation light source unit 71 excitation light source 73 collimator lens 75 reflecting mirror group 78 condensing lens 81 heat sink 100 fluorescent light emitting unit 120 red light source device 121 red light source 125 condensing lens group 130 heat sink 140 light guide optical system 141 first dichroic Mirror 148 Second dichroic mirror 160 Optical system unit 161 Illumination side block 165 Image generation block 168 Projection side block 170 Light source side optical system 173 Condensing lens 175 Light tunnel 178 Condensing lens 181 Optical axis conversion mirror 183 Condensing lens 185 Irradiation mirror (Optical element)
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 condenser lens group 310 heat sink 500 mirror fixing device (light source element fixing device)
510 Fixed frame 512 Reference cylinder hole 513 Adjustment slot 514 Adjustment slot 515 Adjustment hole 520 Optical element support 521 Support section 522 Inclination angle adjustment section 522a Screw hole (Inclination angle adjustment screw hole) 523 Substrate Portion 524 Thin portion 525 Reference column portion 525a Groove or protrusion 526, 527 Screw hole 528 hole

Claims (6)

An optical element support for supporting the optical element, and a fixed frame coupled to the optical element support,
The optical element support is
A support for supporting the optical element;
An inclination angle adjusting part having an inclination angle adjusting screw hole on the back surface of the support part;
A substrate part connected to the support part and a thin part and having a reference cylindrical part for positioning with respect to the fixed frame,
The fixed frame is
A positioning hole into which the reference cylindrical portion is inserted;
In the vicinity of the positioning hole, a fixing screw hole that is a long hole around the positioning hole and fixes the substrate portion to the fixing frame;
In the vicinity of the positioning hole, an optical element fixing device comprising: an adjustment hole that is an elongated hole centered on the positioning hole and that passes through an adjustment screw that is screwed into the inclination angle adjusting screw hole.   2. The optical element fixing device according to claim 1, wherein the reference cylindrical portion has a groove or a protrusion on the surface on the fixed frame side for facilitating rotation with respect to the fixed frame surface.   The optical element fixing device according to claim 1, wherein two fixing screw holes are arranged with the adjustment hole interposed therebetween.   4. The optical element fixing device according to claim 1, wherein the optical element is a reflection mirror. A light source device;
A display element that forms an optical image with light from the light source device;
A light source side optical system that guides and radiates light from the light source device to the display element;
A projection-side optical system that projects an optical image formed by the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The projector according to claim 4, wherein the light source side optical system includes the optical element fixing device according to claim 4. An angle adjustment method of an optical element by the optical element fixing device according to any one of claims 1 to 4,
A fixing step of fixing the optical element to the optical element support;
Inserting the reference cylindrical portion of the optical element support into a positioning hole of the fixed frame;
A first adjustment step of adjusting the rotation angle by rotating the optical element support around the reference cylindrical portion;
Fixing the fixing frame and the optical element support by screwing screws into the adjustment slot,
A second adjustment step of adjusting the tilt angle of the optical element by passing the adjustment screw through the adjustment hole and screwing the adjustment screw into the inclination angle adjustment screw hole;
An optical element angle adjusting method by an optical element fixing device.

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