JP2010198772A - Light source device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact light source in which the quantity of light is increased and heat generation can be controlled, and a projector equipped with the light source. <P>SOLUTION: The light source device 1 includes a light emitting element unit 2 in which a light emitting element 10 is respectively fixed to a part of a plurality of through holes 22 of a support body 20 having the plurality of through holes 22, and the optical axes of the plurality of light emitting elements 10 fixed are made mutually nearly in parallel. A plurality of light emitting element units 2 are arranged in front and rear directions of the optical axes, and the light emitting elements 10 are arranged in any of each through holes 22 overlapping in the optical direction of the support body 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a light source device including a plurality of light emitting element units having a plurality of light emitting elements, and a projector incorporating the light source device.

  2. Description of the Related Art Today, a projector as an image projection apparatus that projects 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 is widely used. This projector focuses light emitted from a light source device on a micromirror display element called DMD (digital micromirror device) or a liquid crystal plate to display a color image on a screen.

  In the past, projectors using a high-intensity discharge lamp as a light source have been the mainstream. However, in recent years, development for using a light-emitting diode (LED), a laser diode (LD), or the like as a light-emitting element of a light source device has been made. Has been made. In order to make up for the shortage of output of the light emitting element alone, proposals have been made regarding a light source device that emits high output light using a plurality of light emitting elements.

  For example, Japanese Patent Laid-Open No. 2004-220015 (Patent Document 1) proposes a light source device in which light emitting elements are arranged in a matrix in order to increase the amount of light. However, in the invention of Patent Document 1, since the light emitting elements are densely arranged in a matrix on the same plane, the amount of light can be increased, but there is a problem that the light emission efficiency is lowered and the life is shortened due to heat generation of the light emitting elements. It was.

  In Japanese Patent Laid-Open No. 2006-60033 (Patent Document 2), a plurality of laser modules including a plurality of light emitting elements are arranged so as to have the same emission direction and divided into a plurality of light source rows. An improved light source device has been proposed.

JP 2004-220015 A JP 2006-60033 A

  In the invention of Patent Document 2, although the light source device can be made compact by dividing the laser module into a plurality of light source rows, the laser module is divided into a plurality of light source rows on the same plane. It is difficult to efficiently collect the emitted light as it is, and it is necessary to acquire high-power laser light by focusing the light with an optical fiber. Further, although each light emitting element is divided into a plurality of light source arrays, there is a problem that the cooling effect is low because all the light emitting elements are held by a single cooling plate.

  The present invention has been made in view of such problems of the prior art, and by disposing a plurality of light emitting elements in a distributed manner, the amount of light is increased and the temperature rise of the light emitting elements is suppressed. It is an object of the present invention to provide a compact and easy-to-handle light source device capable of maintaining performance and a projector including the light source device.

In the light source device of the present invention, light emitting elements are respectively fixed to a part of the plurality of through holes of the holding body having a plurality of through holes, and the optical axes of the plurality of fixed light emitting elements are substantially parallel to each other. The light emitting element unit that is
A plurality of the light emitting element units are arranged in the front-rear direction of the optical axis, and the light emitting elements are arranged in any one of the through holes that overlap the direction of the optical axis in the holding body. .

  A plurality of the light emitting element units may be arranged with a predetermined gap, and the holding body may have a heat radiation fin formed so as to be arranged with the predetermined gap.

  In addition, the light emitting element is not disposed adjacent to the through hole in the vertical direction and the horizontal direction in a single light emitting element unit, and the through holes in the plurality of light emitting element units located on the same axis. It is preferable to arrange in any of the holes.

  Further, in this light source device, a cable connected to the light emitting element can be wired so as to pass through a through hole of the holding body arranged on the same axis as the optical axis of the light emitting element and on the rear side.

  In this light source device, a collimator lens may be disposed in front of the light emitting element.

  In addition, it is preferable that the light source device includes two light emitting element units, and the light emitting elements are alternately arranged in the vertical direction and the horizontal direction between the front light emitting element unit and the rear light emitting element unit. is there.

  The light source device can employ a light emitting diode as the light emitting element.

  In addition, the light source device includes, as the light emitting element, a red light emitting diode that emits red wavelength band light, a green light emitting diode that emits green wavelength band light, and a blue light emitting diode that emits blue wavelength band light. Can be adopted.

  Further, the light source device may have a condensing lens in front of the light emitting element unit.

  The projector of the present invention includes a light source device, a display element, a cooling fan, a light source side optical system that guides light from the light source device to the display element, and an image emitted from the display element. And a projector control means for controlling the light source device and the display element, and the light source device is any one of the light source devices described above.

  According to the present invention, an increase in the amount of light can be achieved by dispersing and arranging the light emitting elements in a plurality of light emitting element units installed in the front-rear direction of the optical axis so as to concentrate light emitted from the plurality of light emitting elements. In addition, a compact and easy-to-handle light source device capable of suppressing the temperature rise of the light emitting element and maintaining performance over a long period of time and a projector including the light source device can be provided.

It is an external appearance perspective view of the light source device which concerns on the Example of this invention. It is side surface sectional drawing of the light source device which concerns on the Example of this invention. It is a front schematic diagram of the light emitting element unit according to the example of the present invention. It is side surface sectional drawing of the light source device which concerns on the Example of this invention. It is a front schematic diagram of the light emitting element unit according to the example of the present invention. It is a perspective view which shows the external appearance of the projector using the light source device which concerns on the Example of this invention. It is a schematic diagram which shows the internal structure of the projector using the light source device which concerns on the Example of this invention. It is a figure which shows the functional circuit block of the projector using the light source device which concerns on the Example of this invention.

  A mode for carrying out the present invention will be described. The projector 100 includes three light source devices 1, a display element 51, a cooling fan, a light source side optical system 62 that guides light from the light source device 1 to the display element 51, and an image emitted from the display element 51. Is provided with a projection-side optical system 90 that projects the light onto the screen, and projector control means for controlling the light source device 1 and the display element 51.

  The three light source devices 1 include a red light source device 1R including a red light emitting diode as a light emitting element 10 that emits red wavelength band light, and a green light source including a green light emitting diode as a light emitting element 10 that emits green wavelength band light. A device 1G and a blue light source device 1B including a blue light emitting diode as the light emitting element 10 that emits light in a blue wavelength band.

  In the light source device 1, the light emitting elements 10 are respectively fixed to the rear portions of the through holes 22 in the holding body 20 having the plurality of through holes 22 in a matrix, and the light emitting elements 10 are fixed. Two light emitting element units 2 whose optical axes are substantially parallel to each other are provided, and the light emitting element units 2 are arranged in the front-rear direction of the optical axis of each light emitting element 10, and the optical axis of each light emitting element 10 in the holding body 20 The light emitting element 10 is disposed in any one of the through holes 22 that overlap in the direction.

Further, the light emitting elements 10 are alternately arranged in the vertical direction and the horizontal direction with respect to the front light emitting element unit 2a and the rear light emitting element unit 2b.
Further, the light source device 1 is wired so that the cable 11 connected to the light emitting element 10 passes through the through hole 22 of the holding body 20 disposed on the same axis and the rear as the optical axis of the light emitting element 10. .

In the light source device 1, a collimator lens 12 is disposed in front of the light emitting element 10.
The two light emitting element units 2 are arranged with a predetermined gap. The holding body 20 is formed of a heat conductive member having high heat conductivity, and has heat radiation fins 23 formed so as to be disposed in the gap between the two light emitting element units 2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of a light source device 1 according to an embodiment of the present invention. FIG. 2 is a side sectional view of the light source device 1 according to the embodiment of the present invention. FIGS. 3A and 3B are schematic front views showing the arrangement of the light emitting elements 10 in the front light emitting element unit 2a and the rear light emitting element unit 2b according to the embodiment of the present invention.

  As shown in FIGS. 1 to 3, the light source device 1 includes two light emitting element units 2 fixed to a mounting base 4. In the light source device 1, the light emitting element unit 2 is arranged at a predetermined interval in the front-rear direction of the optical axis of the light source device 1, and is arranged after the front light emitting element unit 2a arranged on the front side and the rear side. A gap is formed between the side light emitting element unit 2b.

  The light emitting element unit 2 includes a base portion 21 fixed to the mounting base 4, a holding body 20 that is a vertical wall rising from the base portion 21, and a plurality of light emitting elements 10. As shown in FIGS. 3A and 3B, the holding body 20 has a plurality of circular through holes 22 formed in a matrix, and light is emitted from a part of the plurality of through holes 22. Each element 10 can be attached and held. The through hole 22 is formed so that the optical axes of the light emitting elements 10 to be attached are substantially parallel to each other. Each light emitting element 10 is attached to the rear part of the through hole 22 of the holding body 20 so that the optical axis of the light emitted from one light emitting element 10 and the optical axis of the light emitted from the other light emitting element 10 are parallel to each other. It has been.

  The light-emitting element 10 is a solid-state light-emitting element such as a laser diode or a light-emitting diode, and is disposed in any one of the through holes 22 that overlap the optical axis direction of the light-emitting element 10 in the holding body 20. That is, the light emitting element 10 is disposed in any of the through holes 22 in the front light emitting element unit 2a and the rear light emitting element unit 2b located on the same axis.

  In addition, the light emitting element 10 has a front side light emission so that the light emitting elements 10 are not adjacent to each other in the vertical direction or the horizontal direction by attaching the light emitting element 10 to the through holes 22 adjacent in the vertical direction or the horizontal direction. The element units 2a and the rear light emitting element units 2b are alternately arranged in the vertical direction and the horizontal direction. That is, the through hole 22 of the rear light emitting element unit 2b disposed on the central axis of the through hole 22 of the front light emitting element unit 2a to which the light emitting element 10 is attached is an opening without the light emitting element 10 being attached. The In addition, the light emitting element 10 is attached to the through hole 22 of the rear light emitting element unit 2b arranged on the central axis of the through hole 22 of the front light emitting element unit 2a to which the light emitting element 10 is not attached.

  That is, the light emitted from the light emitting element 10 of the rear light emitting element unit 2b passes through the through hole 22 of the front light emitting element unit 2a and is emitted forward. Further, since the collimator lens 12 is fitted in front of each light emitting element 10 at the front portion of the through hole 22, the light emitted from each light emitting element 10 is emitted from the collimator lens 12 as parallel light. It will be.

  Therefore, the light emitted from the rear light emitting element unit 2b passes through the through-hole 22 of the front light emitting element unit 2a as parallel light and is emitted forward, so that the light from the light emitting element 10 is used without waste. Thus, the light quantity of the light source device 1 can be increased efficiently. Furthermore, the light emitted from the front light emitting element unit 2a is also collimated and emitted forward together with the light emitted from the rear light emitting element unit 2b, so that the light emitted in a dense state can be efficiently projected onto the irradiation target. Can be light.

  In front of the front light emitting element unit 2a, a condenser lens 3 that condenses the light emitted from each light emitting element 10 of the light emitting element unit 2 is fixed to the mounting base 4 and integrated. Thereby, the condensed light can be irradiated to a predetermined irradiation target.

  The holder 20 of the light emitting element unit 2 is made of a heat conductive member such as copper or aluminum having high heat conductivity. In the light emitting element unit 2, the light emitting elements 10 are adjacent to each other in the vertical and horizontal directions of the through holes 22 formed in a matrix in the holding body 20 of the single light emitting element unit 2 as shown in FIG. Therefore, it is possible to efficiently dissipate heat while avoiding concentration of heat.

  Further, the holding body 20 is formed with heat radiating fins 23 made of a heat conducting member so as to protrude in the front-rear direction. Thereby, the heat from the light-emitting elements 10 arranged in a distributed manner is distributed to the entire holding body 20 including the heat radiation fins 23 as heat conduction members, and heat can be efficiently radiated from the surfaces of the heat radiation fins 23 and the holding body 20. it can.

  And since this radiation fin 23 protrudes from the holding body 20 so as to be arranged in the gap between the light emitting element units 2, the gap between the light emitting element units 2 can be used effectively. The light source device 1 can be configured compactly. In this embodiment, the heat radiation fins 23 are also formed in front of the front light emitting element unit 2a and behind the rear light emitting element unit 2b to enhance the cooling efficiency. The radiating fins 23 may not be formed in the front-rear direction, but may be formed so as to protrude in one direction forward or rearward, and the front light-emitting element unit 2a and the rear light-emitting element unit 2b are connected to each other. Alternatively, they may be integrally formed.

  The heat radiation fins 23 are arranged so as not to block the optical path of the emitted parallel light. In this embodiment, the radiating fins 23 are formed between the through holes 22 so as to extend in the horizontal direction, but the radiating fins 23 may be provided so as to extend in the vertical direction. The heat dissipating fins 23 protruding rearward of the light emitting element unit 2 are formed as support plates that support the light emitting elements 10 from the rear and are separate members from the holding body 20, but may be integrally formed.

  Further, in the light source device 1, since the condenser lens 3 is disposed on the mounting base 4 in front of the front light emitting element unit 2a, the radiation fins 23 are formed so as to protrude in front of the front light emitting element unit 2a. Thus, the gap between the condenser lens 3 and the front light emitting element unit 2a is also effectively used.

  The cable 11 connected to the light emitting element 10 attached to the front light emitting element unit 2a passes through the through hole 22 of the holding body 20 of the rear light emitting element unit 2b on the same axis as the optical axis of the light emitting element 10. Are wired in the front-rear direction. Thus, by routing the cable 11 in the front-rear direction without blocking the light path of the light-emitting element 10, the through-hole 22 to which the light-emitting element 10 is not attached can be used effectively, and as a result, the light source device 1 Can be configured compactly and mounted on various devices. Further, since each light emitting element unit 2 can be detached from the mounting base 4 without removing the mounting base 4 fixed to the device, maintenance can be easily performed for each light emitting element unit 2.

  Therefore, as described above, the plurality of light emitting elements 10 are dispersed and arranged in the plurality of light emitting element units 2 so that the light is densely emitted in a matrix, thereby increasing the amount of light and the light emitting elements. Thus, it is possible to provide a compact and easy-to-handle light source device 1 that can suppress a temperature increase of 10 and maintain performance over a long period of time.

  Further, by arranging two light emitting element units 2 in the front-rear direction of the optical axis, the light emitting elements 10 are alternately arranged in the vertical direction and the horizontal direction in the front light emitting element unit 2a and the rear light emitting element unit 2b, The amount of light emitted from the front side light emitting element unit 2a and the amount of light emitted from the rear side light emitting element unit 2b can be made substantially the same. Heat can be released.

  Further, the light emitting element unit 2 is not limited to the case where two light emitting element units 2 are provided in the front-rear direction of the optical axis of the light emitting element 10, and may be provided with three or more light emitting element units. Various arrangement patterns can be adopted for the arrangement of the light emitting elements 10.

  For example, in the light source device 1 having three light emitting element units 2, as shown in FIGS. 4 and 5, three light source rows are formed at predetermined intervals in the front-rear direction of the optical axis of the light source device 1. As described above, the light emitting element unit 2 is arranged on the mounting base 4.

  The light emitting elements 10 are sequentially arranged in the vertical and horizontal directions with respect to the first row of light emitting element units 2c, the second row of light emitting element units 2d, and the third row of light emitting element units 2e, and are coaxially arranged. Two or more light emitting elements 10 are not arranged and are not adjacent to each other in the horizontal direction and the vertical direction in the same holding body 20.

  The cable 11 connected to the light emitting element 10 is wired in the front-rear direction so as to pass through the through hole 22 of the holding body 20 disposed on the same axis as the optical axis of the light emitting element 10 and on the rear side. That is, the cable 11 connected to the light emitting elements 10 held by the light emitting element units 2c in the first row is inserted into the through holes 22 of the light emitting element units 2d and 2e in the second row and the third row, and the two rows The cable 11 connected to the light emitting element 10 held by the light emitting element unit 2d of the eye is inserted into the through hole 22 of the light emitting element unit 2e in the third row. As a result, the through hole 22 can be effectively used as an opening for wiring as described above.

  Then, by increasing the number of light emitting element units 2 in this manner, the light emitting elements 10 can be more dispersed and disposed on the holding body 20, so that the cooling efficiency can be further improved.

  Further, as the arrangement pattern of the light emitting elements 10, the light emitting elements 10 need only be arranged in any one of the through holes 22 that overlap in the direction of the optical axis of the light emitting element 10 in the holding body 20. It can also be arranged adjacent in the lateral direction. The through holes 22 are formed in a matrix in a direction parallel to and perpendicular to the mounting base 4, but may be arranged at a predetermined angle with respect to the mounting base 4, or at equal intervals. It is not limited to forming.

  The light source device 1 can be mounted on various devices. For example, if the light source device 1 in which the light emitting element 10 is a laser diode capable of emitting high-power light such as ultraviolet light is mounted on a projector, the light emitted from the plurality of light source devices 1 is irradiated to a plurality of phosphors as excitation light. Then, the wavelength band light of each color generated by exciting each phosphor is sequentially incident on the DMD, and the DMD is time-division controlled in accordance with the incident timing to generate an image, and the color image is displayed on the screen or the like. Can be displayed.

  Further, if the light source device 1 having the light emitting element 10 as a light emitting diode is mounted on a projector, a color image can be displayed on a screen or the like by using the wavelength band light of each color generated from the plurality of light source devices 1. . In addition, by using a light emitting diode as the light emitting element 10 of the light source device 1, the projector can reduce power consumption and can be downsized as compared with a projector using a conventional discharge lamp or the like as the light source device. . Hereinafter, an example of mounting on a projector will be described with reference to FIGS.

  As shown in FIG. 6, the projector 100 has, for example, a substantially rectangular parallelepiped shape, and has a lens cover 109 that covers the projection port on the side of the front panel 102. The front panel 102 has a plurality of exhaust holes 107. Provided.

  Further, the top panel 101 is provided with a key / indicator section 37. The key / indicator section 37 is provided with a key and an indicator such as a power switch key and a power indicator for notifying whether the power is on or off.

  Furthermore, various terminals 120 such as an input / output connector section and a power adapter plug are provided on the back panel of the main body case. A plurality of intake holes 108 are formed near the lower portions of the right panel 104 and the left panel 105, respectively.

  In addition, as shown in FIG. 7, the projector 100 has a light source control circuit board 131 with a power circuit block 130 and the like attached in the vicinity of the right panel 104, and a sirocco fan type blower 133 in the approximate center. A control circuit board 132 is disposed in the vicinity of the blower 133, and optical system units such as various lenses and mirrors are disposed in the vicinity of the left panel 105. In the vicinity of the front panel 102 of the projector 100, the three light source devices 1 shown in FIGS. 1 to 3 are arranged. In addition, the projector 100 is airtightly divided into an intake side space chamber 138 on the rear panel 103 side and an exhaust side space chamber 139 on the front panel 102 side by a partition wall 137 in the housing, and the blower 133 has a suction port 134 is disposed in the intake side space chamber 138 and the discharge port 135 is positioned at the boundary between the exhaust side space chamber 139 and the intake side space chamber 138.

  The projector 100 includes a light source side optical system 62 that guides the light emitted from the light source device 1 to the display element 51. The light source side optical system 62 uniformly distributes the light beam emitted from the light source device 1. The light guide device 75 has a light intensity distribution and a condensing lens that collects light transmitted through the light guide device 75. The light source side optical system 62 condenses the light reflected by the optical axis changing mirror 74 on the display element 51 and the optical axis changing mirror 74 that changes the optical axis direction of the light beam emitted from the light guide device 75. And a plurality of condenser lenses to be irradiated, and an irradiation mirror 84 that irradiates the display element 51 with a light beam transmitted through these condenser lenses at a predetermined angle.

  The projector 100 includes a DMD as the display element 51. A display element cooling device 53 for cooling the display element 51 is disposed on the rear panel 103 side of the display element 51. It is prevented from becoming.

  Further, the projector 100 includes a lens group of the projection-side optical system 90 that emits light that is reflected by the display element 51 and forms an image to the screen. The projection-side optical system 90 is a variable focus type lens having a fixed lens group 93 and a movable lens group 97 and having a zoom function.Zoom adjustment or zoom can be performed by moving the movable lens group 97 by a lens motor. Focus adjustment is possible.

  Further, in the internal structure of the projector 100, members having a temperature lower than that of the light source device 1 are arranged in the intake side space chamber 138. Specifically, the light source control circuit board 131 and the blower 133 are arranged. The control circuit board 132 and optical system units such as various lenses and mirrors of the light source side optical system 62 and the projection side optical system 90 are arranged.

  On the other hand, in the exhaust-side space chamber 139, the light source device 1 that is at a relatively high temperature, the condensing optical system that guides the light beam from the light source device 1 to the light guide device 75, the light guide device 75, and the exhaust temperature reduction device 136 and are arranged.

  The three light source devices 1 emit red, green, and blue light, which are the three primary colors of light. The red light source device 1R includes a red light emitting diode that emits light in the red wavelength region as the light emitting element 10. A green light source device 1G including a green light emitting diode that emits light in a green wavelength range as the light emitting element 10, and a blue light source device 1B including a blue light emitting diode that emits light in a blue wavelength region as the light emitting element 10. It is comprised from. Then, the projector 100 emits a condensing lens, a reflection mirror, and light in a predetermined wavelength range so that the light bundles emitted from the light source devices 1R, 1G, and 1B are condensed and incident on the light guide device 75. It has a condensing optical system composed of a dichroic mirror that reflects and transmits other wavelength band light.

  The light source device 1 that emits each color is time-division controlled by a light source control circuit of a projector control unit, which will be described later, and causes a light beam in a predetermined wavelength region to enter the light guide device 75 via a condensing optical system. The light bundle incident on the light guide device 75 is guided to the display element 51 by the light source side optical system 62, and an image is generated by the display element 51 and projected from the projection side optical system 90 onto the screen.

  The projector control means of the projector 100 includes a control unit 38, an input / output interface 33, an image conversion unit 34, a display encoder 39, a display drive unit 42, and the like, and various standards input from the input / output connector unit 30. The image signal is converted into an image signal of a predetermined format suitable for display by the image conversion unit 34 via the input / output interface 33 and the system bus (SB), and then output to the display encoder 39.

  The display encoder 39 develops and stores the input image signal in the video RAM 40, generates a video signal from the stored contents of the video RAM 40, and outputs the video signal to the display driving unit 42.

  The display drive unit 42 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 39, and is emitted from the light source device 1. The light bundle is guided to the light guide device 75 by the condensing optical system and is incident on the display element 51 through the light source side optical system 62, thereby forming an optical image with the reflected light of the display element 51, and the projection side optical system 90. An image is projected and displayed on a screen (not shown) through a projection system lens group. The movable lens group 97 of the projection side optical system 90 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 data is compressed and 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 in 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 34. Is output to the display encoder 39, and based on the image data stored in the memory card 32, processing for enabling display of a moving image or the like is performed.

  The control unit 38 controls the operation of each circuit in the projector 100, and includes a ROM that stores operation programs such as a CPU and various settings in a fixed manner, 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 upper panel 101 of the main body case 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.

  The control unit 38 causes the light source control circuit 41 to control the red light source device 1R, the green light source device 1G, and the blue light source device 1B in a time-sharing manner in accordance with the image signal. 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 device 1 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, and further turns off the projector body depending on the result of temperature detection by the temperature sensor. Control is also performed.

  As described above, the light source device 1 built in the projector 100 is composed of three single-color light source devices 1R, 1G, and 1B that can emit light in the wavelength bands of red, green, and blue. When blinking, red, green, and blue wavelength band lights are sequentially incident on the light guide device 75 via the condensing optical system, and the DMD that is the display element 51 of the projector 100 matches the irradiation timing of each light source device 1. A color image can be generated on the screen by time-sharing the light of each color according to the data.

  The projector 100 employs the above-described light source device 1 that makes it possible to effectively suppress the temperature rise of the light emitting element 10 by arranging the light emitting diodes as the light emitting elements 10 in a distributed manner. Therefore, it is possible to provide a compact and easy-to-handle projector 100 that can maintain performance over a long period of time.

  The light source device 1 is not limited to being mounted on the projector 100, but can be mounted and used in various devices such as an exposure device. The light source device 1 that emits a single color is not limited to the combination of red, green, and blue. The illumination device includes a single color light source device 1 and a single color light source device 1. It can also be used by being mounted on various lighting devices and display devices such as a lighting device capable of irradiating a spotlight.

  The present invention is not limited to the above-described embodiments, and can be freely changed and improved without departing from the gist of the invention. For example, in the case of a smaller projector, the light emitting element 10 is not limited to the case where the light source device 1 emits the same color wavelength range light as described above, but the three light emitting element units 2 are red, Different light emitting elements 10 are arranged for each light emitting element unit 2 so as to emit light in the green and blue wavelength ranges, and a single light source device 1 in which a condenser lens 3 is arranged in front, and each light emitting element unit The light emission timing of 2 may be changed or emitted simultaneously. In this way, if a single light source device 1 generates a plurality of types of wavelength band light, each light source device 1 can sequentially generate each color, so the design of the equipment to be mounted such as the projector 100 The degree of freedom can be improved. In the present embodiment, the through holes 22 formed in the holding body 20 are formed in a matrix shape, but the present invention is not limited to the matrix shape, and a plurality of through holes 22 may be formed concentrically. A plurality of through holes 22 may be formed at random.

1 Light source device 1R Red light source device
1G Green light source device 1B Blue light source device
2 Light emitting element unit 2a Front light emitting element unit
2b Rear light emitting element unit 2c Light emitting element unit in the first row
2d Light emitting element unit in the second row 2e Light emitting element unit in the third row
3 Condenser lens 4 Mounting base
10 Light emitting element 11 Cable
12 Collimator lens 20 Holder
21 Base 22 Through hole
23 Radiation fin 30 Input / output connector
31 Image compression / decompression unit 32 Memory card
33 I / O interface 34 Image converter
35 Ir receiver 36 Ir processor
37 Key / Indicator section 38 Control section
39 Display encoder 40 Video RAM
41 Light source control circuit 42 Display driver
43 Cooling fan drive control circuit 45 Lens motor
47 Audio processor 48 Speaker
51 Display element 53 Display element cooling device
62 Light source side optical system 74 Optical axis change mirror
75 Light guide device 84 Irradiation mirror
90 Projection side optical system 93 Fixed lens group
97 Movable lens group 100 Projector
101 Top panel 102 Front panel
103 Rear panel 104 Right panel
105 Left panel 107 Exhaust hole
108 Air intake hole 109 Lens cover
120 Various terminals 130 Power supply circuit block
131 Light source control circuit board 132 Control circuit board
133 Blower 134 Air inlet
135 Discharge port 136 Exhaust temperature reduction device
137 Partition bulkhead 138 Inlet side space
139 Exhaust space room

Claims (10)

A light emitting element unit in which light emitting elements are respectively fixed to a part of the plurality of through holes of the holding body having a plurality of through holes, and the optical axes of the plurality of fixed light emitting elements are substantially parallel to each other. Prepared,
A plurality of the light emitting element units are arranged in the front-rear direction of the optical axis, and the light emitting elements are arranged in any one of the through holes that overlap the direction of the optical axis in the holding body. Light source device.   2. The light emitting device unit according to claim 1, wherein a plurality of the light emitting element units are arranged with a predetermined gap, and the holding body has a heat radiation fin formed so as to be arranged with the predetermined gap. Light source device.   The light emitting elements are not arranged adjacent to each other in the vertical direction and the horizontal direction of the through holes in a single light emitting element unit, and the through holes in the plurality of light emitting element units located on the same axis. The light source device according to claim 1, wherein the light source device is disposed at any one of the positions.   The cable connected to the light emitting element is wired so as to pass through a through-hole of the holding body arranged on the same axis and rearward as the optical axis of the light emitting element. Item 4. The light source device according to any one of Items 3 to 4.   The light source device according to claim 1, wherein a collimator lens is disposed in front of the light emitting element.   The two light emitting element units are arranged, and the light emitting elements are alternately arranged in a vertical direction and a horizontal direction in a front light emitting element unit and a rear light emitting element unit. The light source device according to claim 5.   The light source device according to claim 1, wherein the light emitting element is a light emitting diode.   The light emitting element is a red light emitting diode that emits light in a red wavelength band, a green light emitting diode that emits light in a green wavelength band, and a blue light emitting diode that emits light in a blue wavelength band. Item 8. The light source device according to Item 7.   The light source device according to claim 1, further comprising a condenser lens in front of the light emitting element unit. A light source device, a display element, a cooling fan, a light source side optical system that guides light from the light source device to the display element, and a projection side optical system that projects an image emitted from the display element onto a screen; A projector control means for controlling the light source device and the display element,
The projector according to claim 1, wherein the light source device is the light source device according to claim 1.

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