JP5880924B2 - LIGHT SOURCE DEVICE, PROJECTOR, AND LIGHT SOURCE DEVICE MANUFACTURING METHOD - Google Patents

Description

  The present invention relates to a light source device, a projector using the light source device, and a method for manufacturing the light source 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 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.

  With the spread of video equipment such as personal computers and DVD players, the use of projectors has expanded from business presentations to home use. In such projectors, a projector using a high-intensity discharge lamp as a light source has been mainly used in the past. However, in recent years, a semiconductor light emitting device such as a plurality of laser diodes is used as a light source, and a plurality of lenses, mirrors, etc. There have been many developments and proposals of light source devices composed of optical components.

  Then, the direction of the semiconductor light emitting element is adjusted by a holding member that holds the semiconductor light emitting element such as a laser diode, an elastic member and three set screws between the holding member that holds the lens, and semiconductor light emission A light source device for a writing device capable of holding an element in a predetermined position has also been proposed. (For example, Patent Document 1)

JP 2004-341451 A

  However, the above-described light source device holds the semiconductor light emitting element and the lens on separate holding members, and adjusts the direction of the semiconductor light emitting element and the distance between the lens and the semiconductor light emitting element with three screws. Although it is possible to accurately irradiate the irradiation target position, adjustment is required.

  The present invention has been made in view of the above-described problems of the prior art, and uses an elastic member to correct the deviation between the optical axis of the light source element and the optical axis of the lens to facilitate alignment. It is an object to provide a light source device, a projector using the light source device, and a method for manufacturing the light source device.

  The light source device of the present invention includes a light source element holder for housing a light emitting element, a collimator lens, and an elastic body and holding a cylindrical housing having a lens position adjusting means, and a rear holder, and the light emitting element Has a cylinder part and a flange part provided at the rear end of the cylinder part, and the housing is a light emitting element that is in contact with the periphery of the flange part of the light emitting element, and a flange part that protrudes inside the tip The collimator lens fixed by the lens position adjusting means so that the inside of the collar portion contacts the front surface, and the elastic member is disposed behind the collimator lens. The body is stored in a compressed state, and the light emitting element is stored behind the elastic body, and the rear holder is in close contact with the rear end of the housing and the rear surface of the light emitting element. Be disposed on the rear surface of the element holder for a light source to said.

  The projector of the present invention includes a light source device, a display element, a light source side optical system that guides light from the light source device to the display element, and a projection side optical that projects an image emitted from the display element onto a screen. A light source device that emits red wavelength band light, a light source device that emits blue wavelength band light, and green wavelength band light. A light source device for emitting light, wherein at least one light source device is the above-described light source device of the present invention.

The method for manufacturing a light source device of the present invention includes a light source element holder that holds a light-emitting element, a collimator lens, an elastic body, and a cylindrical housing that includes a lens position adjusting unit, and a rear holder. The light emitting element includes a cylinder part and a flange part provided at a rear end of the cylinder part, and the housing includes a plurality of flange parts protruding inward of a tip, and the flange part of the light emitting element. A light-emitting element holding portion that is in contact with the periphery, and the housing stores the collimator lens fixed by the lens position adjusting means so that the inside of the plurality of flanges contacts the front surface, and the housing The elastic body is stored in a compressed state behind the collimator lens, and the light emitting element is stored behind the elastic body. The rear holder includes a rear end of the housing and the rear holder. A method of manufacturing a light source device disposed on a rear surface of the light source element holder so as to be in close contact with a rear surface of an optical element, the step of accommodating the collimator lens in the housing, and the elastic body being accommodated in the housing. A step of housing the light emitting element in the housing, a step of attaching the housing to an adjustment jig, a step of lighting the light emitting element, operating the lens position adjusting means , A step of moving to a predetermined position in a lens adjustment space that is a gap between the stored collimator lens and the inner wall of the housing; a step of fixing the operated lens position adjusting means; and a step of fixing the housing to the adjustment jig. And a step of attaching the housing to the light source element holder.

  According to the present invention, a light source device that uses an elastic member to correct a misalignment between the optical axis of the light source element and the optical axis of the lens to facilitate alignment, a projector using the light source device, and a light source device The manufacturing method of 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 sectional drawing of the light source device which concerns on embodiment of this invention. It is a figure which shows the structure inside the housing which concerns on embodiment of this invention. It is the figure which looked at the housing which concerns on embodiment of this invention from the front. It is a figure of the helical spring which is an elastic means which concerns on embodiment of this invention. It is sectional drawing of the housing which shows the state before the collimator lens position adjustment of the housing which concerns on this embodiment, and after a collimator lens position adjustment. It is a flowchart which shows the flow of the manufacturing method of the light source device which concerns on embodiment of this invention. It is a figure regarding the lens position adjustment means which concerns on embodiment of this invention. It is a figure regarding the lens position adjustment means which concerns on embodiment of this invention.

  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 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, an input / output connector portion provided with a D-SUB terminal, an S terminal, an RCA terminal, an audio output terminal, and the like for inputting a video signal to which a USB terminal or an analog RGB video signal is input to the rear panel is provided on the rear surface of the housing; Various terminals 20 such as a power adapter plug are provided. 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 the operation of each circuit in the projector 10, and includes a CPU, a ROM that stores operation programs such as various settings fixedly, and a RAM that is used as a work memory. Yes.

  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. The projector 10 irradiates the light beam emitted from the light source unit 60 to the display element 51 through a light source side optical system described later, thereby forming an optical image with the reflected light of the display element 51, and An image is projected and displayed on a screen (not shown) through an optical system. The movable lens group 235 of the projection side optical system 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 out 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. A process for enabling display of a moving image or the like based on the image data output to the display encoder 24 and stored in the memory card 32 is performed.

  Then, the operation signal of the key / indicator unit 37 composed of the main key and the indicator provided on the top panel 11 of the casing is directly sent to the control unit 38, and the key operation signal from the remote controller is received by IR. The code signal received by the unit 35 and demodulated by the IR processing unit 36 is output to the control unit 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. Individual control for emitting light in the red, green and blue wavelength bands of the light source unit 60 is performed.

  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. The fluorescent light emitting device 100 disposed near the front panel 12, the red light source device 120 disposed between the excitation light irradiation device 70 and the fluorescent light emitting device 100, and the emission light and red color from the fluorescent light emitting device 100 A light guide optical system 140 that converts the optical axis of light emitted from the light source device 120 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 a light source group 72 composed of a plurality of excitation light sources 71 arranged so that the optical axis thereof is parallel to the back panel 13, and the optical axis of the emitted light from each excitation light source 71 is 90 in the direction of the front panel 12. A plurality of reflection mirrors 75 that convert the degree of light, a condensing lens 78 that condenses the light emitted from each excitation light source 71 reflected by the plurality of reflection mirrors 75, and the excitation light source 71 and the right panel 14 are disposed. A heat sink 81 and the like are provided.

  The light source group 72 is composed of a plurality of excitation light sources 71 that are blue laser emitters arranged in a matrix. On the optical axis of each excitation light source 71, a collimator lens 73 that converts the light emitted from each excitation light source 71 into parallel light so as to enhance the directivity is arranged. The plurality of reflecting mirrors 75 are arranged in a stepped manner, and by narrowing the interval between the light source light beams emitted from each excitation light source 71, the cross-sectional area of the light beam emitted from the light source group 72 is reduced in the horizontal direction. It is reduced and reflected toward the condenser 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 disposed between the reflection mirror 75 and the back panel 13, and the reflection mirror 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 excitation light irradiation device 70 on the fluorescent wheel 101 and condenses the light bundle emitted from the fluorescent wheel 101 toward the rear panel 13; And a condensing lens 115 that condenses the light bundle emitted from the fluorescent wheel 101 toward the front panel 12.

  The fluorescent wheel 101 receives the emission light from the excitation light irradiation device 70 as excitation light and emits the green fluorescent light emission region in the green wavelength band, and the diffusion that diffuses and transmits the emission light from the excitation light irradiation device 70 The transmission region is arranged in parallel in the circumferential direction. Further, the base material in the green fluorescent light emitting region is a metal base material made of copper, aluminum or the like, and the surface of the base material on the back panel 13 side is mirror processed by silver vapor deposition or the like. A green phosphor layer is laid on the surface. Furthermore, the base material in the diffuse transmission region is a transparent base material having translucency, and fine irregularities are formed on the surface of the base material by sandblasting or the like.

  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 reflected directly to the rear panel 13 side or after being reflected by the surface of the fluorescent wheel 101 and then emitted to the rear panel 13 side and enters the condenser lens group 111. Further, the light emitted from the excitation light irradiating device 70 irradiated to the diffuse transmission region of the fluorescent wheel 101 is incident on the condenser lens 115 as diffuse transmitted light diffused by the fine unevenness. A cooling fan 261 is disposed between the wheel motor 110 and the front panel 12, and the fluorescent light emitting device 100 and the like are cooled by the cooling fan 261.

  The red light source device 120 is a monochromatic light emitting device including a red light source 121 arranged 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. is there. The red light source 121 is a red light emitting diode that emits light in the red wavelength band. 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. 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 light guide optical system 140 includes a condensing lens that condenses the light bundles in the red, green, and blue wavelength bands, and a reflection mirror that converts the optical axes of the light bundles in the respective color wavelength bands into the same optical axis, It consists of a dichroic mirror. Specifically, 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 intersect with the red wavelength band light emitted from the red light source device 120. A first dichroic mirror 141 that transmits blue and red wavelength band light, reflects green wavelength band light, and converts the optical axis of the green light by 90 degrees toward the left panel 15 is disposed.

  Also, on the optical axis of the blue wavelength band light diffusely transmitted through the fluorescent wheel 101, that is, between the condenser lens 115 and the front panel 12, the blue wavelength band light is reflected and the optical axis of this blue light is on the left side. A first reflecting mirror 143 that converts 90 degrees in the direction of the panel 15 is disposed. Further, on the optical axis of the blue wavelength band light reflected by the first reflection mirror 143 and in the vicinity of the optical system unit 160, a second reflection mirror for converting the optical axis of the blue light by 90 degrees in the direction of the back panel 13 145 is arranged.

  Further, the optical axis of the red wavelength band light transmitted through the first dichroic mirror 141, the optical axis of the green wavelength band light reflected by the first dichroic mirror 141 so as to coincide with this optical axis, and the second reflection mirror 145 At the position where the optical axis of the reflected blue wavelength band light intersects, the blue wavelength band light is transmitted, the red and green wavelength band light is reflected, and the optical axes of the red and green light are 90 degrees toward the rear panel 13. A second dichroic mirror 148 for changing the degree is arranged. A condensing lens is disposed between the dichroic mirror and the reflecting mirror. 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 guide 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 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. As the light source side optical system 170 included in the illumination side block 161, the light tunnel 175 that uses the light beam emitted from the light source unit 60 as a light flux having a uniform intensity distribution and the light emitted from the light tunnel 175 are condensed. There are a condensing 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 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 condenser lens 195 as the projection-side optical system 220 is disposed near 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.

  Next, the configuration of a light source device that emits blue wavelength band light according to the present invention and includes an excitation light source 71 as an excitation light irradiation device 70 in the light source device that emits green wavelength band light will be described in detail with reference to the drawings. Explained. FIG. 4 is a cross-sectional view showing the configuration of the light source device. In the present embodiment, the left and right in the light source device of the present invention means the left and right with respect to the light emission direction of the excitation light source 71 shown in FIG. And

  As shown in FIG. 4, the light source device stores the excitation light source 71, the collimator lens 73, the excitation light source 71 and the collimator lens 73, and also stores an elastic body such as a helical spring 86, and stores the stored collimator lens 73. A plurality of screws 85 that are lens position adjusting means for fixing the collimator lens 73 and adjusting the posture of the collimator lens 73 by contacting the collimator lens 73 through a lens adjustment space 87 that is a gap between the inner wall and the housing inner wall. It has a housing 84, a light source element holder 79 that holds the housing 84, and a rear holder 82 that holds the housing 84 from the rear.

  The excitation light source 71 is a light source element, and is a blue laser emitter having a flange 71a made of a cylindrical metal having a diameter larger than that of the cylinder 71b at the rear end of the cylindrical cylinder 71b and capable of dissipating heat. It is a light emitting element which consists of. Further, the beam divergence angle of the emitted light from the light emitting point by the excitation light source 71 is about 20 to 30 degrees.

  FIG. 5 is a diagram showing a configuration inside the housing. As shown in FIG. 5, the collimator lens 73 is a cylindrical thick lens, and the light incident side and the light emitting side are formed into predetermined curved surfaces, and the beam divergence angle d is about 20 to 30 degrees. The light is converted into parallel light so as to enhance the directivity of the light emitted from each excitation light source 71. Note that FIG. 5 does not show the helical spring 86 for easy understanding of the positional relationship between the collimator lens 73 and the excitation light source 71.

  As will be described in detail later, in order for the collimator lens 73 to properly convert the light emitted from each excitation light source 71 into parallel light, the distance L between the principal point of the collimator lens 73 and the emission center of the excitation light source 71 is: The collimator lens 73 and the excitation light source 71 are arranged in the housing 84 so as to be equal to the length of the focal length of the collimator lens 73.

  The housing 84 is a hollow and cylindrical metal material such as aluminum, and has a plurality of flange portions 84d that protrude inward from the front end of the main body portion 84c. The front surface of the collimator lens 73 is on the inner side of the flange portion. The collimator lens 73 is brought into contact with the lens holding portion 84a in the optical axis to restrict the movement of the collimator lens 73 in the front direction of the optical axis. FIG. 6 is a plan view of the housing 84 as viewed from the front. As described above, in this embodiment, the housing 84 includes four flange portions 84d, and the flange portions 84d are arranged so that two straight lines formed by connecting a pair of opposed flange portions 84d are orthogonal to each other. Since the collar portion 84d is provided in this manner, the position of the collimator lens 73 can be accurately defined, and the collimator lens 73 can be accurately installed at a desired position determined when the housing 84 is designed. Alternatively, the collar portion 84d may be formed in an annular shape, and the front surface of the collimator lens 73 may be brought into contact with the lens holding portion 84a inside the annular collar portion.

  Further, the housing 84 is provided with a lens adjustment space 87 which is a gap between the periphery of the accommodated collimator lens 73 and the inner wall of the housing 84.

  Specifically, the housing 84 is in contact with the collimator lens 73 via the lens adjustment space 87 around the collimator lens 73, and the lens position adjustment means for fixing the position of the collimator lens 73 or adjusting the attitude of the collimator lens 73. A plurality of screws 85 are provided.

  In the present embodiment, the plurality of screws 85 serving as lens position adjusting means in the housing 84 are arranged in three directions around the central axis on the plane perpendicular to the central axis of the housing 84 at the center in the thickness direction of the collimator lens 73. Although three are arranged at equal intervals, if the restricting direction of the collimator lens 73 is limited by the structure of the housing 84, the screw 85 may be adjusted at one place or two places.

  In addition, the housing 84 is compressed between a helical spring 86 that is an elastic body as shown in FIG. 7 so as to be sandwiched between the rear of the collimator lens 73 and the front of the excitation light source 71. It is arranged with. The helical spring 86 is in contact with only the cylinder 71b side end of the excitation light source 71 and the side end of the collimator lens 73, and is arranged so as not to be a shadow of the light emitted from the excitation light source 71. Then, the helical spring 86 biases the collimator lens 73 forward in a compressed state, presses the collimator lens 73 against the lens holding portion 84a of the housing 84, and biases the excitation light source 71 to the rear side of the housing 84. doing. Note that the elastic body has a structure that does not become a shadow of light emitted from the excitation light source 71 as described above, for example, a structure having an opening in the center portion, in addition to the spring material such as the helical spring 86. A rubber material having an elastic force may be used.

  The housing 84 has a light emitting element holding portion 84b in contact with the periphery of the flange portion 71a of the excitation light source 71 on the rear end side of the main body portion 84c. Accordingly, the excitation light source 71 is held and fixed by the light emitting element holding portion 84b of the housing 84 so that the optical axis is not tilted or is not moved laterally, which is movement in the direction perpendicular to the optical axis.

  As described above, the excitation light source 71 is regulated and held and fixed in the housing so as not to move in the direction perpendicular to the optical axis. Then, the housing 84 adjusts and fixes the position of the collimator lens 73 with a screw 85 that is a lens position adjusting means so that the entire lens holding portion 84a is surely in contact with a predetermined curved surface on the emission side of the collimator lens 73. In the housing, the optical axis of the collimator lens 73 and the optical axis of the light emitted from the excitation light source 71 are designed to coincide with each other.

  That is, FIG. 8 is a cross-sectional view of the housing showing the state before and after collimator lens position adjustment, but the exit side surface of the collimator lens 73 is formed in a curved surface. 8 is installed in the housing 84 in an inclined state, as shown in FIG. 8A, the collimator lens is in a state in which some of the plurality of lens holding portions 84a of the housing 84 are not in contact with the curved surface on the emission side of the collimator lens 73. 73 is installed in the housing 84. From this state, the screw 85 is used to adjust the position of the collimator lens 73 so that all of the plurality of lens holding portions 84a are in contact with the exit-side curved surface of the collimator lens 73 as shown in FIG. In the housing 84, the housing 84 is designed so that the optical axis of the collimator lens 73 and the optical axis of the light emitted from the excitation light source 71 coincide.

  In the present embodiment, the collimator lens 73 is brought into contact with the inner wall of the housing 84 so that the collimator lens 73 is not positioned in the vertical direction of the optical axis, and the lens adjustment is performed between the surrounding collimator lens 73 and the inner wall of the housing 84. A space 87 is provided and a screw 85 is used to adjust the collimator lens position and the optical axis angle. This is in view of the fact that the collimator lens 73 is a precision part and may affect its optical characteristics by being damaged.

  That is, when the collimator lens 73 is positioned in the direction perpendicular to the optical axis on the inner wall of the housing 84, when the collimator lens 73 is inserted into the housing 84, a lens adjustment space is provided between the periphery of the collimator lens 73 and the inner wall of the housing 84. Since there is no 87, it is very difficult to insert it, and if it is forcibly inserted, the collimator lens 73 may be damaged. In order to prevent such a situation, in the present embodiment, a lens adjustment space 87 is provided between the periphery of the stored collimator lens 73 and the inner wall of the housing 84, and the position of the collimator lens 73 is fixed by the screw 85 or the attitude of the collimator lens 73 is adjusted. It is the composition which does.

  Further, the rear end of the housing 84 is flush with the rear end surface of the excitation light source 71 by attaching to the housing 84 so as to cover the light source element holder 79 and the rear holder 82, which will be described later. As a result, the excitation light source 71 is biased rearward by the helical spring 86 from the front of the excitation light source 71, and the rear surface of the flange portion 71a of the excitation light source 71 is flush with the front surface of the rear holder 82. These are arranged at predetermined positions in the optical axis direction.

  The light source element holder 79 is a flat plate shape of a metal material such as aluminum or copper, and holds the housing 84 from the side.

  The rear holder 82 has a flat plate shape made of a metal material such as aluminum or copper, and is disposed on the rear surface of the light source element holder 79. The rear holder 82 includes an element support portion 82b that presses the flange portion 71a of the excitation light source 71 from the rear. With the support portion 82b, the rear surface of the flange portion 71a of the excitation light source 71 is flush with the front surface of the rear holder 82, and the excitation light source 71 is arranged at a predetermined position in the optical axis direction.

  The rear holder 82 has a hole portion 82a that is in close contact with the rear surface of the excitation light source 71 and penetrates the lead terminal 71c of the excitation light source 71. The lead terminal 71c of the excitation light source 71 is connected to a flexible substrate or the like to be connected to the control circuit. Connected to the substrate 241.

  The rear holder 82 holds a plurality of housings 84 that house the excitation light source 71, the collimator lens 73, and the helical spring 86. Further, the rear holder 82 has a heat sink 81 on the rear surface as shown in FIG.

  Thus, inside the housing 84, the collimator lens 73 is urged in the front direction by the helical spring 86 from the rear, and is regulated by the lens holding portion 84a in the front direction of the optical axis, so that a predetermined position in the optical axis direction is obtained. Will be placed.

  Inside the housing 84, the excitation light source 71 is urged rearward by a helical spring 86 from the front, and the rear is flush with the front surface of the rear holder 82 and is arranged at a predetermined position in the optical axis direction. The Rukoto.

  That is, the position of the collimator lens 73 in the optical axis direction is defined by pressing and contacting the lens holding portion 84a of the housing 84 with the helical spring 86 from the rear of the collimator lens 73, and further from the front of the excitation light source 71. The position of the excitation light source 71 in the optical axis direction is defined by being biased rearward by the winding spring 86 and making the rear surface of the flange portion 71a of the excitation light source 71 flush with the front surface of the rear holder 82.

  Therefore, the arrangement relationship between the excitation light source 71 and the collimator lens 73 is uniquely defined, and the housing 84 has a distance L between the principal point of the collimator lens 73 and the emission center of the excitation light source 71 in this arrangement relationship. And the length of the focal length of the collimator lens 73 are designed to be equal.

  By the way, when a plurality of collimator lenses and a plurality of excitation light sources are respectively mounted on different members, the plurality of collimator lenses and the plurality of excitation light sources are accurately determined depending on the clearance of joints between different members or the processing accuracy of each member. It was difficult to align the optical axes. In this embodiment, the optical axis of the collimator lens 73 and the optical axis of the excitation light source 71 are made to coincide with each other with a single housing 84, and a plurality of housings 84 whose optical axis adjustment has been completed are prepared. Since it is configured to be installed in the rear holder 82, there is no need to worry about the joint clearance between different members and the processing accuracy of each member, and even if a plurality of collimator lenses 73 and excitation light sources 71 are installed in the light source device, the collimator is accurate. The optical axes of the lens 73 and the excitation light source 71 can be coaxial.

  Next, the flow of the manufacturing method of the light source device of this invention is demonstrated using figures. FIG. 9 is a flowchart showing a flow of a manufacturing method of the light source device. FIG. 10 is a cross-sectional view showing a unit state when adjusting the lens position at the time of manufacturing the light source device. FIG. 11 is a view of the unit state when adjusting the lens position during manufacture of the light source device, as viewed from the front.

  As described above, the light source device includes a light source element holder 79, a rear holder 82, a collimator lens 73, an excitation light source 71, a plurality of screws 85 that are lens position adjusting means, and a helical spring 86 that is an elastic body. And a housing 84 having.

  In the light source device manufacturing method, first, the collimator lens 73 is inserted from the rear of the housing 84 and stored so that the front surface of the collimator lens 73 is in contact with the lens holding portion 84a of the housing 84 (step S10).

  Next, a step (step S20) of inserting and storing the coil spring 86 from the rear of the housing 84 in contact with the rear surface of the collimator lens 73 in the housing 84 storing the collimator lens 73 is performed.

  Subsequently, a step (step S30) is performed in which the excitation light source 71 is inserted into the housing 84 housing the helical spring 86 from behind the housing 84 so as to contact the rear surface of the helical spring 86 (step S30). The collimator lens 73, the helical spring 86, and the excitation light source 71 are housed respectively.

  Next, a step of attaching the collimator lens 73, the helical spring 86, and the housing 84 housing the excitation light source 71 to the adjustment jig and positioning the excitation light source 71 at a predetermined position inside the housing 84 (step S40). I do. FIG. 10 illustrates the unit state during this process. The adjustment jig supports the housing 84 from below the housing 84, and has a lower jig 300 having a hole 300a through which the lead terminal 71c of the excitation light source 71 passes, and the housing 84 is fixed and the lower jig is moved upward. And a ring-shaped upper jig 301 that is supported from the above. By using such a jig, the excitation light source 71 and the collimator lens 73 are arranged at predetermined positions in the optical axis direction in the housing 84 so that the rear side of the excitation light source 71 is flush with the front surface of the jig 300. It becomes.

  Subsequently, a step of turning on the excitation light source 71 of the housing 84 attached to the adjustment jig (step S50) is performed.

  Next, in order to adjust the position of the optical axis of the collimator lens 73 and the optical axis of the light emitted from the excitation light source in the housing 84 in which the excitation light source 71 is turned on, the lens position adjustment means 3 shown in FIG. The step of adjusting the posture of the collimator lens 73 (step S60) is performed so that the screw 85 positioned in the direction is rotated and the lens holding portion 84a is surely in contact with the exit-side curved surface of the collimator lens. In this embodiment, since this step is performed with the excitation light source 71 turned on, the entire lens holding portion 84a is securely attached to the exit-side curved surface of the collimator lens while observing the light brightness of the excitation light source 71 and the like. Can be contacted.

  Subsequently, a step of fixing each screw 85 with a fixing material such as an adhesive so that the collimator lens 73 in which all of the lens holding portion 84a is securely in contact with the exit-side curved surface of the collimator lens does not move (step S70). I do.

  Once each screw 85 is fixed by the fixing material, a step of removing the housing 84 from the adjustment jig (step S80) is then performed.

  Subsequently, the housing 84 is attached to the light source element holder 79 (step S90), and the rear holder 82 is arranged so that the lead terminal 71c of the excitation light source 71 passes through the hole 82a of the rear holder 82, and is arranged on the rear surface of the excitation light source 71. At the same time, the light source element holder 79 is disposed so as to be in close contact with the rear surface (step S95).

  Next, the process (step S100) of connecting a flexible substrate etc. and the lead terminal 71c of the excitation light source 71 is performed.

  As described above, the manufacturing method of the light source device includes the above-described steps, thereby using the elastic member to correct the misalignment between the optical axis of the excitation light source 71 and the optical axis of the collimator lens 73 to facilitate alignment. Can do.

  In the steps S50 and S60, the position of the collimator lens 73 is adjusted while the excitation light source 71 is turned on. However, the lens holding portion 84a of the housing 84 and the collimator lens 73 are not turned on without turning on the excitation light source 71. Of course, it is possible to adjust the arrangement while viewing the above.

  In the above embodiment, the configuration of the excitation light irradiation device 70 that is a blue light source device has been described as a light source device of the projector 10 formed by combining a light source element with a lens array 73 including a plurality of lens portions 73b. The light source device of the present invention includes, for example, a light source group in which a plurality of light sources are arranged in rows and columns in a red light source device and a green light source device of the projector 10 and each light emitted from each light source. The present invention can be similarly applied to a configuration of an optical system having a lens group for condensing a light beam.

  In the above embodiment, the configuration of the excitation light irradiation device 70 formed by arranging a plurality of blue laser diodes as semiconductor light emitting elements in a matrix as the light source device of the projector 10 has been described, but the light source of the present invention For example, the apparatus may be configured in a light source device including a light source using a light emitting element having a large light emission amount even with a single element, and a lens such as a condenser lens that collects a light bundle emitted from the light source. A housing structure and a holder structure can be applied.

  As described above, according to the embodiment of the present invention, a light source device that facilitates alignment by correcting a deviation between the optical axis of the light source element and the optical axis of the lens using an elastic member, It is possible to provide a bright light source device having an appropriate arrangement of light sources, a projector 10 capable of performing bright projection using the light source device, and a method for manufacturing a bright and efficient light source device.

  Furthermore, according to the embodiment of the present invention, the collimator lens 73 is arranged by holding and fixing the excitation light source 71 by the light emitting element holding portion 84b of the housing 84 so as not to be inclined and laterally moved with respect to the light emission direction. The optical axis of the excitation light source 71 can be stabilized when adjusting the posture.

  Further, according to the embodiment of the present invention, the distance between the principal point of the collimator lens 73 and the emission center of the excitation light source 71 is equal to the length of the focal length of the collimator lens 73. By performing the adjustment, the positions of the lens and the light source can be appropriately arranged.

  Further, according to the embodiment of the present invention, the position can be adjusted relatively easily by using the three screws 85 as the lens adjusting means.

  Furthermore, according to the embodiment of the present invention, since the screw 85 that is the lens position adjusting means is located at the center of the collimator lens 73 in the thickness direction, the collimator lens 73 is properly aligned in the direction perpendicular to the optical axis during adjustment. Can be moved to.

  According to the embodiment of the present invention, by using the helical spring 86 as the elastic body, the collimator lens 73 and the excitation light source 71 can be urged in a predetermined direction with a relatively inexpensive configuration.

  In addition, according to the embodiment of the present invention, a plurality of housings 84 housing the excitation light source 71, the collimator lens 73, and the helical spring 86 are held by the light source element holder 79, so that the plurality of optical axes are appropriately adjusted. The light source device with high brightness can be obtained.

  Furthermore, according to the embodiment of the present invention, by having the heat sink 81 on the rear surface of the rear holder 82, it is possible to effectively cool the light source by dissipating heat generated by the excitation light source 71 using the heat sink 81.

  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 scope 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] A light source element holder for holding a light emitting element, a collimator lens, and an elastic body and holding a cylindrical housing having a lens position adjusting means, and a rear holder,
The light emitting element has a cylinder part and a flange part provided at the rear end of the cylinder part,
The housing includes a flange portion protruding inward of a tip end, and a light emitting element holding portion in contact with the periphery of the flange portion of the light emitting element,
The housing stores the collimator lens fixed by the lens position adjusting means so that the inside of the collar portion contacts the front surface, and stores the elastic body in a compressed state behind the collimator lens, And the light emitting element is stored behind the elastic body,
The rear holder is disposed on a rear surface of the light source element holder so as to be in close contact with a rear end of the housing and a rear surface of the light emitting element.
2. The light source device according to claim 1, wherein a space is provided between the housing and the collimator lens.
[3] The light-emitting element holding portion of the housing holds and fixes the light-emitting element so that the optical axis of the light-emitting element does not tilt and move laterally. Light source device.
[4] The distance between the principal point of the collimator lens and the light emission center of the light emitting element is equal to the length of the focal length of the collimator lens. The light source device described.
5. The lens position adjusting means is three screws arranged at equal intervals in three directions around the central axis on a plane orthogonal to the central axis of the housing. The light source device according to claim 4.
[6] The collimator lens is a thick lens,
The light source device according to claim 1, wherein the lens position adjusting unit is located at a center of the lens in a thickness direction.
[7] The light emitting element further includes a lead terminal extending from a rear end surface of the flange portion,
The rear holder further has a hole through which the lead terminal of the light emitting element passes, and the rear holder is disposed in close contact with the rear surface of the light emitting element so that the lead terminal passes through the hole. The light source device according to claim 1, wherein the light source device is a light source device.
[8] The light source device according to any one of [1] to [7], wherein the elastic body is a helical spring.
9. The light source element holder holds a plurality of the housings housing the light emitting element, the collimator lens, and the elastic body. Light source device.
10. The light source device according to claim 1, further comprising a heat sink on a rear surface of the rear holder.
[11] a light source device;
A display element;
A light source side optical system for guiding light from the light source device to the display element;
A projection-side optical system that projects an image emitted from the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The light source device is a light source device that emits red wavelength band light, a light source device that emits blue wavelength band light, and a light source device that emits green wavelength band light, wherein at least one light source device is claimed. A projector characterized by being a light source device according to any one of the above.
[12] A light source element holder for housing a light emitting element, a collimator lens, and an elastic body and holding a cylindrical housing having a lens position adjusting means, and a rear holder, the light emitting element having a cylinder portion And a flange portion provided at the rear end of the flange portion, wherein the housing has a plurality of flange portions protruding inward of the tip, and a light emitting element holding portion in contact with the periphery of the flange portion of the light emitting element The collimator lens fixed by the lens position adjusting means is accommodated in the housing so that the insides of the plurality of flanges are in contact with the front surface, and the elastic member is rearward of the collimator lens. The body is stored in a compressed state, the light emitting element is stored behind the elastic body, and the rear holder is in close contact with the rear end of the housing and the rear surface of the light emitting element. A manufacturing method of a light source device is disposed on the rear surface of sea urchin said element holder for a light source,
Storing the collimator lens in the housing;
Storing the elastic body in the housing;
Storing the light emitting element in the housing;
Attaching the housing to an adjustment jig;
Lighting the light emitting element;
Activating the lens position adjusting means to move the collimator lens to a predetermined position in the lens adjustment space;
Fixing the operated lens position adjusting means;
Removing the housing from the adjustment jig;
Attaching the housing to the light source element holder;
The manufacturing method of the light source device characterized by the above-mentioned.
[13] The light emitting device further includes a lead terminal extending from a rear end surface of the flange portion,
The method of manufacturing a light source device according to claim 12, further comprising a step of connecting a flexible substrate and the lead terminal.

DESCRIPTION OF SYMBOLS 10 Projector 11 Top panel 12 Front panel 13 Rear panel 14 Right side panel 15 Left side 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 irradiation device 71 Excitation light source 71a Flange part 71b Cylinder part 71c Lead terminal 72 Light source group 73 Collimator lens 75 Reflection mirror 78 Condensing lens 79 Light source element holder 81 Heat sink 82 Rear holder 82a Hole part 84 Housing 84a Lens Holding portion 84b Light emitting element holding portion 84c Main body portion 84d Gutter portion 85 Screw 86 Helical spring 87 Lens adjustment space 100 Fluorescent light emitting device 101 Fluorescent wheel 110 Wheel motor 111 Condensing lens group 11 Condensing lens 120 Red light source device 121 Red light source 125 Condensing lens group 130 Heat sink 140 Light guiding optical system 141 First dichroic mirror 143 First reflecting mirror 145 Second reflecting 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 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 Lower jig 300a Hole 301 Upper jig

Claims (13)

A light source element holder for housing a light emitting element, a collimator lens, and an elastic body, and holding a cylindrical housing having a lens position adjusting means; and a rear holder,
The light emitting element has a cylinder part and a flange part provided at the rear end of the cylinder part,
The housing includes a flange portion protruding inward of a tip end, and a light emitting element holding portion in contact with the periphery of the flange portion of the light emitting element,
The housing stores the collimator lens fixed by the lens position adjusting means so that the inside of the collar portion contacts the front surface, and stores the elastic body in a compressed state behind the collimator lens, And the light emitting element is stored behind the elastic body,
The rear holder is disposed on a rear surface of the light source element holder so as to be in close contact with a rear end of the housing and a rear surface of the light emitting element.   The light source device according to claim 1, wherein a space is provided between the housing and the collimator lens.   3. The light source device according to claim 1, wherein the light emitting element holding portion of the housing holds and fixes the light emitting element so that an optical axis of the light emitting element does not tilt and laterally move. .   The light source according to any one of claims 1 to 3, wherein a distance between a principal point of the collimator lens and a light emission center of the light emitting element is equal to a length of a focal length of the collimator lens. apparatus.   5. The lens position adjusting means includes three screws arranged at equal intervals in three directions around the central axis on a plane orthogonal to the central axis of the housing. The light source device according to any one of the above. The collimator lens is a thick lens,
The light source device according to claim 1, wherein the lens position adjusting unit is located at a center of the lens in a thickness direction. The light emitting element further includes a lead terminal extending from a rear end surface of the flange portion,
The rear holder further includes a hole through which the lead terminal of the light emitting element passes, and the rear holder is disposed in close contact with the rear surface of the light emitting element so that the lead terminal passes through the hole. The light source device according to claim 1, wherein the light source device is a light source device.   The light source device according to claim 1, wherein the elastic body is a helical spring.   The light source device according to claim 1, wherein the light source element holder holds a plurality of the housings in which the light emitting elements, the collimator lens, and the elastic body are accommodated. The light source device according to any one of claims 1 to 9, characterized in that it has a heat sink to the rear surface of the rear holder. A light source device;
A display element;
A light source side optical system for guiding light from the light source device to the display element;
A projection-side optical system that projects an image emitted from the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The light source device is a light source device that emits red wavelength band light, a light source device that emits blue wavelength band light, and a light source device that emits green wavelength band light, wherein at least one light source device is claimed. A projector characterized by being a light source device according to any one of the above. A light source element holder for housing a light emitting element, a collimator lens, and an elastic body and holding a cylindrical housing having a lens position adjusting means; and a rear holder, the light emitting element comprising: a cylinder portion; A flange portion provided at a rear end of the cylinder portion, and the housing includes a plurality of flange portions protruding inward of a front end, and a light emitting element holding portion in contact with the periphery of the flange portion of the light emitting element. And the housing houses the collimator lens fixed by the lens position adjusting means so that the inside of the plurality of flanges contacts the front surface, and the elastic body is compressed behind the collimator lens. The light emitting device is housed in a state and is housed behind the elastic body, and the rear holder is in close contact with the rear end of the housing and the rear surface of the light emitting device. A manufacturing method of a light source device is disposed on the rear surface of the element holder for serial source,
Storing the collimator lens in the housing;
Storing the elastic body in the housing;
Storing the light emitting element in the housing;
Attaching the housing to an adjustment jig;
Lighting the light emitting element;
Activating the lens position adjusting means to move the collimator lens to a predetermined position in a lens adjustment space that is a gap between the stored collimator lens and the inner wall of the housing ;
Fixing the operated lens position adjusting means;
Removing the housing from the adjustment jig;
Attaching the housing to the light source element holder;
The manufacturing method of the light source device characterized by the above-mentioned. The light emitting element further includes a lead terminal extending from a rear end surface of the flange portion,
The method of manufacturing a light source device according to claim 12, further comprising a step of connecting a flexible substrate and the lead terminal.

Images