JP5516948B2 - Light source device and projector - Google Patents

Description

  The present invention relates to a light source device and a projector including 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 a 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, a semiconductor light emitting device such as a laser diode requires appropriate heat dissipation in order to keep the chip temperature within the rated range and guarantee the lifetime. The light emission conversion efficiency of the laser diode is about 30%, and most of the DC power is released from the package as heat. Therefore, operating the laser diode without a heatsink must be avoided.

  However, if silicon grease is used between the laser diode package and the heat sink to improve the thermal conductivity of the laser diode, it is necessary to be careful not to attach silicon grease to the glass surface. The number of man-hours increases and the cost becomes high.

  Therefore, Patent Document 1 shown below discloses a laser module that includes a laser array having a plurality of light emitting units and a cooling body, and can relieve stress during mounting.

JP 2009-158645 A

  However, the laser module disclosed in Patent Document 1 relaxes stress during mounting to prevent mechanical breakage, and does not improve thermal conductivity.

  The present invention has been made in view of the above-described problems of the prior art, and by pressing a semiconductor light emitting element such as a laser diode with an elastic member, the semiconductor light emitting element and a holding member that covers the semiconductor light emitting element are provided. It is an object of the present invention to provide a light source device capable of increasing heat conductivity and radiating heat and a projector including the same.

The light source device of the present invention includes a semiconductor light emitting element, a holding member that exposes and holds at least a peripheral edge of the semiconductor light emitting element, an elastic member provided at the peripheral edge of the semiconductor light emitting element, and a pressing member that presses the elastic member And a heat sink in contact with the holding member at a surface facing the surface of the holding member that holds the semiconductor light emitting element, and the elastic member is provided on the surface of the holding member that holds the semiconductor light emitting element. wherein the semiconductor light emitting element under pressure, said pressing member, characterized in that said a lens holder for holding a collimator lens for converting the light emitted from the semiconductor light emitting device into parallel light.

  Furthermore, the elastic member in the light source device of the present invention is silicon rubber.

  In the light source device of the present invention, the semiconductor light emitting element is provided with irregularities and slopes on the outer periphery thereof, and the holding member is also shaped so that the irregularities and slopes of the outer periphery are in contact with each other. It is characterized by increasing.

  Furthermore, the light source device of the present invention is characterized in that the unevenness and the slope of the outer peripheral portion of the semiconductor light emitting element are provided only in the contact portion with the holding member.

  And the said holding member in the light source device of this invention is heat radiating members, such as aluminum or copper, It is characterized by the above-mentioned.

  According to another aspect of the invention, a projector includes the light source device, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a projector control unit. .

  According to the present invention, a package of a semiconductor light emitting element such as a laser diode is pressed and held by an elastic member, thereby increasing the thermal conductivity between the semiconductor light emitting element and the holding member holding the semiconductor light emitting element to dissipate heat. It is possible to provide a light source device capable of realizing the above and a projector including the same.

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 the side surface schematic diagram and bottom surface schematic diagram of the blue laser diode which concerns on the Example of this invention. It is sectional drawing of the light source device which concerns on the Example of this invention. It is the side surface schematic diagram and bottom surface schematic diagram of the blue laser diode which concerns on the modification of this invention. It is sectional drawing of the light source device which concerns on the modification of this invention.

Hereinafter, modes for carrying out the present invention will be described. The light source device of the projector 10 is
A blue laser diode 71a as a semiconductor light emitting element that is an excitation light source 71, a diode holding body 82a that is a holding member that exposes and holds at least the periphery of the blue laser diode 71a, and an elastic provided at the periphery of the blue laser diode 71a A diode pressing member 80 as a member. The light source device also includes a pressing member that presses the diode pressing member 80, and a heat sink 81 that abuts the diode holder 82a on the surface of the diode holder 82a that faces the surface that holds the blue laser diode 71a. The light source device presses the blue laser diode 71a onto the surface of the diode holder 82a that holds the blue laser diode 71a with the diode pressing member 80.

  The pressing member is a lens holder 79 that holds a collimator lens 73 that converts light emitted from the blue laser diode 71a into parallel light.

  The diode pressing member 80, which is an elastic member, is silicon rubber.

  Further, the light source device is provided with irregularities and slopes on the base 90 which is the outer periphery of the blue laser diode 71b, and the diode holder 82a is also shaped so that the irregularities and slopes of the base 90 are in contact with each other. This increases the contact area.

  The unevenness and the slope of the base 90 of the blue laser diode 71b are provided only in the contact portion with the diode holder 82a.

  The diode holder 82a is a heat radiating member such as aluminum or copper.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  The excitation light source 71 includes a plurality of blue laser diodes arranged in a matrix, and a collimator lens 73 that converts light emitted from each blue laser diode into parallel light is disposed on the optical axis of each blue laser diode. Has been. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a stepped manner, and reduces the cross-sectional area of the light beam emitted from the excitation light source 71 in one direction and emits it to the condensing lens 78.

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

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

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

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

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

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

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

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

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

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

  The illumination side block 161 includes a part of a light guide optical system 170 that guides the light source light emitted from the light source unit 60 to the display element 51 provided in the image generation block 165. As the light guide optical system 170 included in the illumination side block 161, the light tunnel 175 that uses the light flux 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 collected. 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 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.

  Next, a mounting structure of the blue laser diode 71a in the excitation light irradiation device 70 that is a light source device will be described. 4 is a schematic side view and a schematic bottom view showing the appearance of the blue laser diode 71a mounted on the excitation light irradiation device 70, which is a light source device, and FIG. 5 shows the blue laser diode 71a of the excitation light irradiation device 70. It is sectional drawing of the light source device which shows a mounting structure. In the description of the mounting structure of the excitation light irradiation device 70, the light emitting portion side of the blue laser diode 71a is the upper surface, and the lead terminal 92 side is the lower surface.

  The package of the blue laser diode 71a, which is the excitation light source 71 shown in FIG. 4, covers the base 90 that forms a disc-shaped outer periphery at the center and the light emitting part that is placed inside the base 90 at the top. And a cylindrical cap portion 91 provided.

  The base 90 is provided with three lead terminals 92 extending so as to protrude from the lower surface of the base 90. The lead terminal 92 can be electrically connected to an external electrode. The blue laser diode 71a is formed by bonding a cylindrical cap portion 91 in the vertical direction from the upper surface of the base 90.

  The base 90 has a function of dissipating heat as a disk-shaped metal member having good thermal conductivity because the light emitting part is mounted and generates heat.

  As shown in FIG. 5, the excitation light irradiation device 70 that is a light source device includes a blue laser diode 71a, a collimator lens 73, a lens holder 79 that holds the collimator lens 73, and an elastic member that pressurizes the base 90. A diode pressing member 80 made of silicon rubber or the like, a diode holding body 82a that is a holding member that holds and exposes at least the periphery of the base 90 of the blue laser diode 71a, and a blue laser diode of the diode holding body 82a The heat sink 81 is in contact with the diode holder 82a on the surface facing the surface holding the 71a.

  The lens holder 79 holds the collimator lens 73 that converts the light emitted from the blue laser diode 71a into parallel light, and has a function of covering the cap portion 91 of the blue laser diode 71a. The portion of the lens holding body 79 that covers the cap portion 91 has a slight gap with the cap portion 91, and can be incorporated even when the outer diameter error of the blue laser diode 71a is the maximum value. In addition, the lens holding body 79 is formed with a groove for placing a diode pressing member 80 made of silicon rubber or the like which is an elastic member for pressing the base 90 of the blue laser diode 71a and has good heat resistance. .

  The diode pressing member 80 is disposed in the groove of the lens holder 79 to pressurize the base 90 of the blue laser diode 71a and has a function of pressing toward the lead terminal 92. The diode pressing member 80 pressurizes the base 90 to increase the contact pressure with the diode holder 82a that holds the base 90, thereby improving the thermal conductivity.

  The diode holder 82a is a heat radiating member such as aluminum or copper, holds the base 90 of the blue laser diode 71a with at least the periphery exposed, and connects the base 90 of the blue laser diode 71a and the heat sink 81. Arranged between. The diode holder 82a has a recess for receiving the lower surface of the base 90 in the blue laser diode 71a, and the base 90 of the blue laser diode 71a disposed in the recess of the diode holder 82a is replaced with the blue laser diode 71a. The diode holding member 82a is pressed by the diode pressing member 80 disposed on the light emitting surface side. Then, the base 90 in the blue laser diode 71a is pressurized to the recessed portion of the diode holder 82a on the lead terminal 92 side of the blue laser diode 71a, and the thermal conductivity to the diode holder 82a is increased. .

  Accordingly, the base 90 on which the light emitting portion of the blue laser diode 71a is mounted and generates heat is thermally connected to the diode holder 82a and dissipates heat due to a cooling effect by the heat sink 81 in contact with the diode holder 82a.

  Next, a configuration of a modified example for further increasing the thermal conductivity to the diode holder 82 will be described. 6A and 6B are a schematic side view and a schematic bottom view showing the appearance of the blue laser diode 71b in the modified example, and FIG. 7 shows the mounting structure of the blue laser diode 71b of the excitation light irradiation device 70 that is the light source device in the modified example. It is sectional drawing of the light source device shown.

  The blue laser diode 71b shown in FIG. 6 increases the surface area of the base 90 by providing irregularities and slopes on the circumferential portion of the disk-shaped base 90. On the other hand, the abutting diode holder 82b has a shape in which the unevenness and the slope provided on the circumferential portion of the base 90 abut. Thereby, the contact area between the base 90 of the blue laser diode 71b and the diode holder 82b is increased, and the thermal conductivity can be further increased.

  The blue laser diode 71b is provided with grooves such as a triangular pyramid shape or a triangular prism shape so as to be inclined from the lower surface to the upper surface in the circumferential portion of the disk-shaped base 90. A triangular groove portion is formed to deepen the notch, and a square groove is formed as a triangular prism shape to deepen the lower cut, and the surface area of the base 90 is increased by providing irregularities on the outer periphery of the base 90.

  As shown in FIG. 7, the excitation light irradiation device 70 that is a light source device includes a blue laser diode 71 b having a base 90 with irregularities and slopes, a collimator lens 73, and a lens holder 79 that holds the collimator lens 73. And a diode pressing member 80 that pressurizes the base 90, a diode holder 82b that fits with the unevenness and slope of the base 90, and a heat sink 81.

  Accordingly, the base 90 on which the light emitting portion of the blue laser diode 71b is mounted and generates heat is thermally connected with a wide contact area with the diode holder 82b, and the heat sink 81 that contacts the diode holder 82b. Dissipates heat due to the cooling effect.

  The blue laser diode 71b is provided with irregularities such as a triangular pyramid shape or a triangular prism shape so as to be inclined from the lower surface to the upper surface in the circumferential portion of the disk-shaped base 90, and is in contact with the diode holder 82b. You may limit to a part.

  As described above, according to the present invention, by pressing the peripheral edge of the base 90 of the blue laser diode 71a as the excitation light source 71 with the diode pressing member 80, the diode holder 82a covering the blue laser diode 71a and Thus, it is possible to provide a light source device capable of increasing heat conductivity and dissipating heat and a projector 10 including the same.

  Further, according to the present invention, by pressurizing the base 90 of the blue laser diode 71a as the semiconductor light emitting element as the excitation light source 71 with the diode pressing member 80, the thermal conductivity with the diode holder 82a is increased, It is possible to provide a light source device that can dissipate heat due to the cooling effect of the heat sink 81 at the bottom.

  According to the present invention, since the diode pressing member 80 is an elastic member having high heat resistance such as silicon rubber, it is suitable for pressurizing the base 90 of the blue laser diode 71a that generates heat.

  Further, according to the present invention, the surface of the base 90 of the blue laser diode 71b as the semiconductor light emitting element 71 serving as the excitation light source 71 is provided with irregularities and slopes to increase the surface area, thereby increasing the contact area with the diode holder 82b. As a result, the thermal conductivity with the diode holder 82b can be further increased.

  Further, according to the present invention, since the diode holders 82a and 82b are heat radiating members such as aluminum or copper, by holding and radiating the blue laser diodes 71a and 71b, the blue laser diodes 71a and 71b High temperature can be prevented and reliability can be improved.

  Furthermore, according to the present invention, by increasing the thermal conductivity between the blue laser diodes 71a and 71b and the diode holders 82a and 82b, it is possible to dissipate heat due to the cooling effect of the heat sink 81 therebelow.

  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, instead of the blue laser diodes 71a and 71b of the excitation light irradiation device 70 that is a light source device, a laser diode or a light emitting diode that emits other wavelength band light such as an ultraviolet laser diode can be adopted as the excitation light source 71.

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, 71b Blue laser diode
73 Collimator lens
75 Reflective mirror group 78 Condensing lens
79 Lens holder 80 Diode pressing material
81 Heat sink 82a, 82b Diode holder
90 Base 91 Cap part
92 Lead terminal 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

Claims (6)

A semiconductor light emitting device;
A holding member that exposes and holds at least a peripheral edge of the semiconductor light emitting element;
An elastic member provided at the periphery of the semiconductor light emitting element;
A pressing member that presses the elastic member;
A heat sink that contacts the holding member at a surface facing the surface that holds the semiconductor light emitting element of the holding member;
With
By the elastic member, the semiconductor light emitting device under pressure to the surface for holding the semiconductor light emitting element of the holding member,
The light source device , wherein the pressing member is a lens holder that holds a collimator lens that converts light emitted from the semiconductor light emitting element into parallel light . The elastic member, serial mounting of the light source apparatus to claim 1, characterized in that the silicone rubber. An unevenness and a slope are provided on the outer peripheral portion of the semiconductor light emitting element, and the holding member is also shaped so that the unevenness and the slope of the outer peripheral portion are in contact with each other to increase the mutual contact area. Item 3. A light source device according to item 1 or 2 . 4. The light source device according to claim 3 , wherein the unevenness and the slope of the outer peripheral portion of the semiconductor light emitting element are provided only in a contact portion with the holding member. The holding member, the light source apparatus according to claim 3 or claim 4, characterized in that a heat radiating member such as aluminum or copper. A light source device according to claims 1 to 5,
A light source side optical system;
A display element for generating a projection image;
A projection-side optical system that projects a projection image;
Projector control means;
A projector comprising:

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