JP5505719B2 - Light source device and projector - Google Patents

Description

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

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

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

  For example, in Japanese Patent Application Laid-Open No. 2006-186243 (Patent Document 1), a laser that is small in size and easy to dissipate heat is provided by arranging semiconductor lasers of three colors of red, green, and blue close to each other on a supporting substrate. A diode is disclosed.

JP 2006-186243 A

  However, the proposal of the above-mentioned Patent Document 1 is a small laser diode in which a semiconductor laser of three colors of red, green and blue is mounted on a main body part as a one-chip package. The laser diode was not used. In particular, when a high-intensity light source is constituted by a plurality of semiconductor light emitting elements such as laser diodes, the semiconductor light emitting elements are densely packed. Thus, it is difficult to dispose a cooling member such as a heat sink for cooling the main body of each semiconductor light emitting element.

  The present invention has been made in view of the above-described problems of the prior art, and can increase the contact area between the heat sink and the main body portions of the plurality of semiconductor light emitting elements, thereby cooling the plurality of semiconductor light emitting elements. An object of the present invention is to provide a light source device and a projector that can increase the brightness.

  The light source device according to the present invention includes a plurality of semiconductor light emitting elements, a holding member that holds the semiconductor light emitting elements, a substrate that is electrically connected to the semiconductor light emitting elements, and the holding member via a heat transfer member. A heat sink that abuts against the semiconductor light emitting element by pressure contact, and each of the semiconductor light emitting elements includes a plurality of lead terminals extending in a direction perpendicular to the bottom of the semiconductor light emitting element, and the substrate is a surface of the substrate. Is arranged perpendicular to the bottom of the semiconductor light emitting device so as to contact at least two of the plurality of lead terminals, and is electrically connected to the lead terminals.

  In the light source device according to the present invention, the substrate is disposed so as to be sandwiched between the plurality of lead terminals of the semiconductor light emitting element.

  Furthermore, it is preferable that the holding member in the light source device according to the present invention has a support portion, and the substrate is further supported by the support portion.

  The substrate in the light source device according to the present invention is provided with an electrode plate connected to each lead terminal of the plurality of semiconductor light emitting elements, and each of the electrode plates connected to the lead terminal is an end of the substrate. It is connected to the connection terminal provided in the section.

  Further, the heat sink in the light source device according to the present invention has a U-shaped groove portion that accommodates the substrate without contacting the substrate and lead terminals of the plurality of semiconductor light emitting elements.

  Furthermore, the semiconductor light emitting element in the light source device according to the present invention is a blue laser diode.

  The projector according to the present invention projects a light source unit, a display element, a light guide optical system for guiding light from the light source unit to the display element, and an image emitted from the display element on a screen. A projector comprising: a projection-side optical system; and a projector control means for controlling the light source unit and the display element, wherein the light source unit is a red light source device that emits red wavelength band light, and a blue light that emits blue wavelength band light. The light source device includes the above-described light source device as an excitation light irradiation device that emits excitation light, and a fluorescent wheel that emits green wavelength band light by irradiating excitation light on a fluorescent plate on which a green phosphor is laid. And

  ADVANTAGE OF THE INVENTION According to this invention, the light source apparatus and projector which can enlarge the contact area of the heat sink and the main-body part of a some semiconductor light-emitting device and can raise the cooling efficiency of a some semiconductor light-emitting 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 circuit block of the projector which concerns on the Example of this invention. 1 is a schematic plan view showing an internal structure of a projector according to an embodiment of the invention. It is an external appearance perspective view of the laser unit of the light source device which concerns on the Example of this invention. It is sectional drawing of the laser unit of the light source device which concerns on the Example of this invention. It is a perspective view from the back which removed the heat sink from the laser unit of the light source device which concerns on the Example of this invention. It is a rear view of the laser unit which removed the heat sink of the light source device which concerns on the Example of this invention.

  Hereinafter, modes for carrying out the present invention will be described. The projector 10 includes a light source unit 60, a display element 51, a light guide optical system 170 that guides light from the light source unit 60 to the display element 51, and a projection side that projects an image emitted from the display element 51 onto a screen. An optical system 220 and projector control means for controlling the light source unit 60 and the display element 51 are provided.

  The light source unit 60 includes a red light source device 120 that emits red wavelength band light, a blue light source device 300 that emits blue wavelength band light, a light source device as an excitation light irradiation device 70 that emits excitation light, and a green phosphor. And a fluorescent wheel 101 that emits green wavelength band light by irradiating the fluorescent plate with the excitation light.

  The light source device as the excitation light irradiation device 70 includes an excitation light source 71 that is a plurality of semiconductor light emitting elements, and a light source holder 79 that is a holding member that holds the periphery of the excitation light source 71. The light source device also includes a substrate 90 that is electrically connected to the plurality of excitation light sources 71. The light source device includes a heat sink 81 that is brought into contact with the excitation light source 71 by being pressed against the light source holder 79 via the heat transfer member 80. In the light source device, each of the excitation light sources 71 includes a plurality of lead terminals 71 a extending in a direction perpendicular to the bottom of the excitation light source 71. The substrate 90 is disposed perpendicular to the bottom of the excitation light source 71 so that the surface of the substrate contacts at least two lead terminals 71a among the plurality of lead terminals 71a, and is electrically connected to the lead terminals 71a. It is connected to the.

  Further, the substrate 90 is disposed so as to be sandwiched between the plurality of lead terminals 71a of the excitation light source 71. The light source holder 79 has a support portion 79a, and the substrate 90 is supported by the support portion 79a.

  Further, the substrate 90 is provided with electrode plates connected to the respective lead terminals 71a of the plurality of excitation light sources 71 on both sides, and the electrode plates connected to the lead terminals 71a are respectively provided on the end portions of the substrate 90. It is connected to the.

  The heat sink 81 has a U-shaped groove portion that accommodates the substrate 90 without contacting the substrate 90 and the lead terminals 71a of the plurality of excitation light sources 71. The excitation light source 71 is a blue laser diode.

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

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

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

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

  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 is composed of a ROM in which operation programs such as a CPU and various settings are fixedly stored, a RAM used as a work memory, and the like. 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. The light beam emitted from the light source unit 60 is irradiated onto the display element 51 through the light guide optical system, thereby forming an optical image with the reflected light of the display element 51, and a projection side optical system to be described later The image is projected and displayed on a screen (not shown). The movable lens group 235 of the projection side optical system is driven by the lens motor 45 for zoom adjustment and focus adjustment.

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

  Then, 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 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. The light emission of the excitation light irradiation device, the red light source device, and the blue light source device of the light source unit 60 is individually controlled.

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

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

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

  The excitation light irradiation device 70 converts the optical axis of the light emitted from the excitation light source 71 by 90 degrees in the direction of the front panel 12 by 90 degrees by the semiconductor light emitting element arranged so that the optical axis is parallel to the back panel 13. A reflection mirror group 75; 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 disposed between the excitation light source 71 and the right panel 14. .

  In the excitation light source 71, blue laser diodes, which are a total of 24 semiconductor light emitting elements in 3 rows and 8 columns, are arranged in a matrix, and light emitted from each blue laser diode is placed on the optical axis of each blue laser diode. Collimator lenses 73 that are condensing lenses that convert the light into parallel light are respectively disposed. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a stepped manner, and reduces the cross-sectional area of the light beam emitted from the excitation light source 71 in one direction and emits it to the condensing lens 78.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  4 is a perspective view of the laser unit 400, FIG. 5 is a sectional view of the laser unit 400, and FIG. 6 is a perspective view showing a connection state of the substrate 90 with the heat sink 81 removed from the laser unit 400. FIG. 7 is a rear view showing a connection state of the substrate 90 of the laser unit 400 shown in FIG. The laser unit 400 will be described with the light emitting surface side shown in FIG. 4 as the front surface, the heat sink 81 side as the back surface, and the vertical and horizontal directions viewed from the front in the perspective view shown in FIG.

  As shown in FIG. 4, the laser unit 400 includes a light source holder 79, a semiconductor light emitting element as the excitation light source 71 described above, a substrate 90, lead wires 91, and a heat sink 81.

  As shown in FIG. 5, the excitation light source 71 has a front portion of the periphery of the package, which is a main body, locked by a protrusion of the light source holder 79. The bottom surface portion of the main body of the excitation light source 71 is flush with the back surface of the light source holder 79 and is coupled to the heat sink 81 so as to sandwich the heat transfer member 80, which is an elastic member, with the back surface of the light source holder 79. The heat sink 81 dissipates heat from the bottom surface of the main body of the excitation light source 71 that sometimes generates heat.

  Note that three lead terminals 71a are provided on the bottom surface portion of the main body of the excitation light source 71 in a direction perpendicular to the bottom surface, and these lead terminals 71a are electrically connected to a substrate 90 described later. To be implemented. As will be described later, the lead terminal 71a provided on the excitation light source 71 and the substrate 90 are mounted in parallel.

  The light source holder 79 is a member having a heat resistant resin property for locking and holding the peripheral front portion of the excitation light source 71. The light source holder 79 is open on the front side so as to expose the light emitting surface of each excitation light source 71 while covering the periphery of each excitation light source 71 as shown in FIGS. The light source holder 79 is coupled to a heat sink 81 located on the back of the laser unit 400 via a heat transfer member 80 by attaching screws 92 to four screw holes provided on the front surface.

  The substrate 90 is a rigid substrate of a double-sided wiring board having an elongated rod shape and a width of about 8 mm and a thickness of about 0.5 mm. The substrate 90 has apex angles of three lead terminals 71a arranged so as to form an isosceles triangle provided on the excitation light source 71 on the back side of the light source holder 79 as shown in FIGS. Are arranged so as to be sandwiched in parallel with the lead terminal 71a in the gap between the one lead terminal 71a and the remaining two lead terminals 71a. In addition, you may further be supported and fixed by the support part 79a provided in the right and left of the light source holding body 79 shown in FIG.

  The substrate 90 is provided with electrode plates on both sides for electrical connection with the three lead terminals 71a of each excitation light source 71. The electrode plate of the substrate 90 and the lead terminals 71a of each excitation light source 71 are Each of them is connected by soldering. Then, the electrical signal of the lead terminal 71a of each excitation light source 71 is routed through the lead wire 91 from the control circuit board 241 to the electrode as the connection terminal provided at the left end of the board 90 shown in FIG. Thus, the light source control circuit 41 is electrically connected.

  The heat sink 81 is formed of a metal material such as aluminum or copper, and the front side has a U-shaped groove shape without contacting the substrate 90 and the lead terminals 71a of the plurality of excitation light sources 71. On the side, the surface area is increased by providing many protrusions in order to improve heat dissipation.

  Further, between the light source holder 79 and the excitation light source 71 and the heat sink 81, a heat transfer member 80, which is an elastic body as shown in FIG.

  As described above, according to the present invention, the substrate 90 that is electrically connected to the lead terminal 71a of each excitation light source 71, which is a semiconductor light emitting element, is disposed so as to be parallel to the lead terminal 71a. It is possible to provide the light source device and projector 10 having a heat dissipation structure that can increase the contact area between 81 and the main body portions of the plurality of excitation light sources 71 and increase the cooling efficiency of the plurality of excitation light sources 71.

  Further, according to the present invention, since the substrate 90 is arranged in parallel with the lead terminal 71a of each excitation light source 71 that is a semiconductor light emitting element, a plurality of excitation light sources 71 are aligned and connected in the same direction. The excitation light emitted from the excitation light source 71 can be aligned. Furthermore, since the substrate 90 is fixed, the soldering operation between the lead terminal 71a and the substrate 90 can be performed without using a special jig.

  According to the present invention, since the lead wire 91 from the control circuit board 241 can be connected and wired to the connection terminal as an electrode provided at the end of the board 90, it is easy to assemble.

  Further, according to the present invention, by using a blue laser diode as the semiconductor light emitting element, the phosphor can be efficiently excited to emit light. Then, by forming a phosphor layer having a phosphor emitting at least green wavelength band light on the fluorescent wheel 101, green wavelength band light which is a primary color can be generated.

  In the present embodiment, the case where the excitation light source 71 has three lead terminals 71a has been described. In that case, the substrate 90 is supported and fixed also using the support portions 79a provided on the left and right of the light source holder 79 described above. In the present embodiment, the case where all the three lead terminals 71a are electrically connected to the substrate has been described. However, the present invention is not limited to this, and it is not necessary to electrically connect all three lead terminals 71a. For example, in the case where two of the three lead terminals 71a are the anode and cathode of the excitation light source 71 and one is the lead terminal 71a that may not be electrically connected as a non-connect, of course, the anode and the cathode Only the corresponding lead terminal 71a needs to be electrically connected.

  Furthermore, in this embodiment, a blue laser diode, which is a semiconductor light emitting element that emits a laser beam in the blue wavelength band, is employed as the excitation light source 71 by the excitation light irradiation device 70 that excites the phosphor in the green wavelength band. In the case of the light source unit 60 generated by providing the red light source device 120 and the blue light source device 300, respectively. However, for example, without providing the blue light source device 300, the fluorescent wheel 101 in which the phosphor layer and the diffuse transmission layer in the green wavelength band are laid, and the blue wavelength band light that has passed through the diffuse transmission layer of the fluorescent wheel 101 is light tunneled. 175 is provided with an optical system including a mirror and a lens that guides light, and a blue laser diode that emits laser light of a blue wavelength band by the excitation light irradiation device 70 is irradiated to the rotating fluorescent wheel 101 to emit green and blue The light source unit 60 that emits the two colors can be used.

  In this manner, the heat dissipation structure of the present invention can also be adopted in the projector 10 using the light source unit 60 including the light sources of the excitation light irradiation device 70 and the red light source device 120 without providing the blue light source device 300.

  Further, it is possible to use the fluorescent wheel 101 in which the red and green phosphor layers and the diffuse transmission layer are laid in the circumferential direction without providing the red light source device 120 and the blue light source device 300, respectively. Lights red wavelength band light, green wavelength band light, and blue wavelength band light emitted by irradiating excitation light to the phosphor layer in the red wavelength band, the phosphor layer in the green wavelength band, and the diffuse transmission layer of the fluorescent wheel 101. An optical system including a mirror and a lens that guides the light to the tunnel 175, and the excitation light of the blue laser diode, which is a semiconductor light emitting element that emits laser light in the blue wavelength band by the excitation light irradiation device 70, is rotated on the fluorescent wheel 101 The light source unit 60 that emits red, green, and blue colors by irradiating can also be provided.

  In this manner, the heat dissipation structure of the present invention can also be adopted in the projector 10 using the light source unit 60 including the excitation light irradiation device 70 without providing the red light source device 120 and the blue light source device 300.

  As the semiconductor light emitting element in the excitation light irradiation device 70 described above, the excitation light source 71 may be an ultraviolet laser diode that emits ultraviolet laser light instead of a blue laser diode. In this case, the fluorescent wheel 101 includes a red region in which a phosphor that emits fluorescent light in the red wavelength band is laid, a green region in which a phosphor that emits fluorescent light in the green wavelength band is laid, and a blue region A blue region in which a phosphor emitting fluorescent light in a wavelength band is laid is laid in the circumferential direction.

  And, the red wavelength band light, the green wavelength band light emitted by irradiating the phosphor layer of the red wavelength band, the phosphor layer of the green wavelength band and the phosphor layer of the blue wavelength band of the fluorescent wheel 101 with the excitation light, and An optical system including a mirror and a lens that guides blue wavelength band light to the light tunnel 175 is provided, and the rotating fluorescent wheel 101 is irradiated with excitation light of an ultraviolet laser diode that emits ultraviolet laser light from the excitation light irradiation device 70. Accordingly, the light source unit 60 that emits red, green, and blue colors can be provided.

  In this way, a projector using the light source unit 60 to which an ultraviolet laser diode that emits an ultraviolet laser beam having a high energy density is applied as the excitation light source 71 included in the excitation light irradiation device 70 without providing the red light source device 120 and the blue light source device 300. The heat radiating structure of the present invention can also be adopted for 10.

  Furthermore, in this embodiment, a blue laser diode, which is a semiconductor light emitting element, is employed as the excitation light source 71 included in the excitation light irradiation device 70 that excites the phosphor in the green wavelength band, and for red and blue other than green, respectively. The case of the light source unit 60 that is generated by providing the red light source device 120 and the blue light source device 300 has been described. For example, three excitation light irradiation devices 70 are provided for three colors of red, green, and blue, and each is a semiconductor. An ultraviolet laser diode that emits an ultraviolet laser beam is provided as a light emitting element, and a first, second, and third fluorescent wheels that are three independent fluorescent wheels for emitting red, green, and blue colors are provided. It doesn't matter.

  An optical system including a mirror and a lens for guiding red wavelength band light emitted from the phosphor layer of the red wavelength band of the first fluorescent wheel to the light tunnel 175, and a phosphor layer of the green wavelength band of the second fluorescent wheel An optical system using a mirror and a lens that guides the green wavelength band light emitted from the light to the light tunnel 175 and the blue wavelength band light emitted from the phosphor layer of the blue wavelength band of the third fluorescent wheel to the light tunnel 175. An optical system including a mirror and a lens that illuminates, and each of the fluorescent wheels is provided with an excitation light irradiation device 70 using an ultraviolet laser diode that irradiates the ultraviolet laser light as a semiconductor light emitting element to each fluorescent wheel. The light source unit 60 that emits red, green, and blue light respectively by irradiating the light source can be used.

  In this case, since the plurality of excitation light irradiation devices 70 can have the same heat dissipation structure, it is possible to contribute to the common use of parts.

  The present invention is not limited to the above embodiments, and can be freely changed and improved without departing from the gist of the invention. For example, the above heat dissipation structure may be employed in the red light source device 120 and the blue light source device 300. In addition to the laser diode, the above-described configuration can be adopted as a heat dissipation structure for the light emitting diode. The light source device having the above heat dissipation structure is not limited to being mounted on the projector 10, but is an illumination illumination device composed of an exposure device and a large number of semiconductor light source devices, and illumination capable of irradiating a monochromatic spotlight. It can also be used by being mounted on various lighting devices and display devices such as devices.

10 Projector
11 Top panel 12 Front panel
13 Rear panel 14 Right panel
15 Left panel 17 Exhaust hole
18 Air intake hole 19 Lens cover
20 Various terminals 21 Input / output connector
22 I / O interface 23 Image converter
24 Display encoder 25 Video RAM
26 Display drive unit 31 Image compression / decompression unit
32 Memory card 35 Ir receiver
36 Ir processing section 37 Key / indicator section
38 Control unit 41 Light source control circuit
43 Cooling fan drive control circuit 45 Lens motor
47 Audio processor 48 Speaker
51 Display element 60 Light source unit
70 Excitation light irradiation device 71 Excitation light source
71a Lead terminal 73 Collimator lens
75 Reflective mirror group 78 Condensing lens
79 Light source holder 79a Support
80 Heat transfer member 81 Heat sink
90 Board 91 Lead wire
92 Screw
100 Fluorescent light emitting device 101 Fluorescent wheel
110 Wheel motor 111 Condensing lens group
120 Red light source 121 Red light source
125 condenser lens group 130 heat sink
140 Light source side optical system 141 First dichroic mirror
148 Second dichroic mirror 160 Optical system unit
161 Lighting block 165 Image generation block
168 Projection side block 170 Light guiding optical system
173 Condensing lens 175 Light tunnel
178 Condensing lens 181 Optical axis conversion mirror
183 Condensing lens 185 Irradiation mirror
190 Heat sink 195 Condenser lens
220 Projection-side optical system 225 Fixed lens group
235 Movable lens group 241 Control circuit board
261 Cooling fan 300 Blue light source device
301 Blue light source 305 Condensing lens group
310 Heat sink 400 Laser unit

Claims (7)

A plurality of semiconductor light emitting elements;
A holding member for holding the semiconductor light emitting element;
A substrate electrically connected to the semiconductor light emitting element;
A heat sink that comes into contact with the semiconductor light emitting element by being in pressure contact with the holding member via a heat transfer member,
Each of the semiconductor light emitting devices comprises a plurality of lead terminals extending in a direction perpendicular to the bottom of the semiconductor light emitting device,
The substrate is disposed perpendicular to the bottom of the semiconductor light emitting element so that the surface of the substrate contacts at least two lead terminals of the plurality of lead terminals, and is electrically connected to the lead terminals. A light source device.   The light source device according to claim 1, wherein the substrate is disposed so as to be sandwiched between the plurality of lead terminals of the semiconductor light emitting element. The holding member has a support portion,
The light source device according to claim 1, wherein the substrate is further supported by the support portion.   The substrate is provided with an electrode plate connected to each lead terminal of the plurality of semiconductor light emitting elements, and the electrode plate connected to the lead terminal is connected to a connection terminal provided at an end portion of the substrate. The light source device according to claim 1, wherein the light source device is a light source device.   5. The heat sink includes a U-shaped groove portion that accommodates the substrate without contacting the substrate and lead terminals of the plurality of semiconductor light emitting elements. 6. The light source device according to item.   The light source device according to claim 1, wherein the semiconductor light emitting element is a blue laser diode. A light source unit, a display element, a light guide optical system that guides light from the light source unit to the display element, a projection-side optical system that projects an image emitted from the display element onto a screen, and the light source unit And a projector control means for controlling the display element,
The light source unit includes: a red light source device that emits red wavelength band light; a blue light source device that emits blue wavelength band light; and an excitation light irradiation device that emits excitation light. A projector comprising: a fluorescent wheel that emits green wavelength band light by irradiating the laid fluorescent plate with excitation light.

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