JP2014123013A - Light source device, and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device using a plurality of light sources, achieving a small light source with high brightness with a simple configuration, and optimal for a projector, and also to provide a projector enabling projection with high brightness while being small.SOLUTION: A light source device includes: a light source including a plurality of laser emitting device; and a micro lens array for setting a radiation range of emission light for each device of the plurality of laser emitting devices and equalizing the light from each device. In the plurality of laser emitting devices, at least one laser emitting device is arranged, rotated centering around an optical axis of emission light at an angle different from other laser emitting devices.

Description

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

  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.

  Conventionally, projectors using a high-intensity discharge lamp as the light source have been the mainstream, but in recent years, red, green, and blue light-emitting diodes and laser diodes, organic EL, phosphors, and the like have been used as light sources. Developments for using solid state light emitting devices have been made and many proposals have been made.

  A light source device using a laser diode can be easily reduced in size and can be a small and high-intensity light source device suitable for a projector. The image may be lowered.

  Therefore, a laser light emitting element includes a splitting unit that splits the wavefront emitted from the light source, a rotating unit that rotates the polarization plane of the light flux of the split wavefront, and a synthesis unit that superimposes the wavefronts of the light fluxes having different polarization plane orientations. A light source device combined with the above has also been proposed. (For example, Patent Document 1)

JP 2008-185628 A

  However, in the light source device of Patent Document 1, the light emitted from the light source is once divided, and the polarization plane of the divided light is rotated and then irradiated onto a predetermined surface, so that it is complicated as a light source device. Production was not easy.

  The present invention has been made in view of the above-described problems of the prior art. A light source device suitable for a projector, and a small high-luminance using a plurality of light sources and having a simple structure as a small high-luminance light source. An object of the present invention is to provide a projector that can project the above.

  A light source device according to the present invention includes a light source composed of a plurality of laser light emitting elements, and a light distribution direction of emitted light emitted from one laser light emitting element among the plurality of laser light emitting elements is set to the plurality of laser light emitting elements. The plurality of laser light emitting elements are arranged so as to be different from the direction of light distribution of emitted light emitted from other laser light emitting elements among the elements.

  A projector according to the present invention includes a light source device, a display element, a projection-side optical system that projects an image emitted from the display element onto a screen, and a projector control unit that controls the light source device and the display element. The light source device is the light source device described above.

  According to the present invention, a light source device suitable for a projector that uses a plurality of light sources, has a simple structure, is small and has high brightness, and makes interference fringes in laser light inconspicuous, and prevents image quality degradation due to interference fringes. A compact projector capable of high-intensity projection can be provided.

1 is an external perspective view showing a projector according to an embodiment of the invention. It is a figure which shows the functional block of the projector which concerns on embodiment of this invention. It is a top view which shows the internal structure which removed the upper surface cover of the projector which concerns on embodiment of this invention. 1 is a schematic plan view showing an optical system of a projector according to an embodiment of the invention. It is explanatory drawing of the emitted light of the red light source which concerns on embodiment of this invention. It is a figure which shows the irradiation position to the microlens array of the emitted light of each light source which concerns on embodiment of this invention. It is a figure which shows arrangement | positioning of each light source which concerns on embodiment of this invention. It is explanatory drawing of the light distribution characteristic of the light from each light source to the microlens array which concerns on embodiment of this invention. It is explanatory drawing which shows illustratively the interference fringe which arises in a light image with the light from each issuing element which concerns on embodiment of this invention.

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

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

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

  In addition, an input / output connector portion provided with a D-SUB terminal, an S terminal, an RCA terminal, an audio output terminal, and the like for inputting a video signal to which a USB terminal or an analog RGB video signal is input on the rear panel is provided on the back of the housing Various terminals 20 such as a power adapter plug are provided. In addition, a plurality of intake holes are formed in the back panel. A plurality of exhaust holes 17 are formed in each of the right panel, which is a side plate of the housing (not shown), and the left panel 15, which is the side plate shown in FIG. An intake hole 18 is also formed at a corner near the back panel of the left panel 15.

  Next, projector control means of the projector 10 will be described with reference to the functional block diagram of FIG. The projector control means includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like. The control unit 38 controls the operation of each circuit in the projector 10, and includes a CPU such as a microprocessor, a ROM that stores operation programs such as various settings in a fixed manner, and a RAM that is used as a work memory. It is comprised by.

  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 a display element control unit, and each mirror of the display element 51 which is a spatial light modulation element (SOM) at an appropriate frame rate corresponding to the image signal output from the display encoder 24. Is turned on or off to drive the reflected light from the light source to be reflected or unreflected. By irradiating the light beam emitted from the light source device 60 to the display element 51 through the irradiation optical system 170, Then, an optical image is formed by the reflected light of the display element 51, and the image is projected and displayed on a screen (not shown) via the projection side optical system 220. The movable lens group 235 of the projection side optical system 220 is driven by the lens motor 45 for zoom adjustment and focus adjustment.

  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 unit, 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 device 60. The light emission timings of the excitation light source unit 70, the red light source device 120, and the blue light source device 130 in the green light source device of the light source device 60 are 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 device 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. FIG. 4 is a schematic plan view showing the light source device 60 of the projector 10. As shown in FIG. 3, the projector 10 includes a control circuit board in the vicinity of the right panel 14. The control circuit board includes a power circuit block, a light source control block, and the like. In addition, the projector 10 includes a light source device 60 at the side of the control circuit board, that is, at a substantially central portion of the projector housing.

  As shown in FIGS. 3 and 4, the light source device 60 is emitted from the excitation light source unit 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 the excitation light source unit 70. A green light source device by the fluorescent light emitting unit 100 disposed on the optical axis of the light bundle and in the vicinity of the front panel 12, a red light source device 120 disposed between the excitation light source unit 70 and the fluorescent light emitting unit 100, and A blue light source device 130, a dichroic mirror 173 that is also an irradiation optical system 170, a microlens array 175, a condenser lens 178, and an irradiation mirror 185 are provided.

  The excitation light source unit 70 of the green light source device includes an excitation light source 71 by a semiconductor light emitting element arranged so that the optical axis is parallel to the back panel 13, and the optical axis of light emitted from each excitation light source 71 in the direction of the front panel 12. A reflection mirror group 75 for converting 90 degrees and a heat sink 78 disposed between the excitation light source 71 and the right panel 14 are provided.

  In the excitation light source 71, blue laser diodes, which are a total of six semiconductor light emitting elements in two rows and three 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 fluorescent light emitting unit 100.

  The excitation light emitted from the excitation light source 71 is transmitted through the dichroic mirror 173 that transmits blue and red and reflects green, and further passes through the condenser lens group 85 and is irradiated onto the phosphor 80.

  Then, by irradiating the phosphor 80 with the excitation light, the green wavelength band light that is excited by the phosphor 80 and emitted is emitted in all directions and directly emitted to the dichroic mirror 173 side or later. Is reflected by the reflective surface on the front heat sink 110 side and then emitted to the dichroic mirror 173 side.

  The green wavelength band light emitted from the phosphor 80 is reflected by the dichroic mirror 173 and applied to the microlens array 175.

  A cooling fan 261 is disposed between the heat sink 78 and the back panel 13. The cooling fan 261 and the heat sink 78 allow the excitation light source unit 70, the red light source device 120, and the blue light source device 130 of the green light source device to be connected. To be cooled.

  Further, a cooling fan 261 is disposed between the reflection mirror group 75 and the back panel 13, and the reflection mirror group 75 is cooled by the cooling fan 261.

  The fluorescent light emitting unit 100 of the green light source device is parallel to the front panel 12, that is, a plate of the phosphor 80 arranged to be parallel to the optical axis of the light emitted from the excitation light source unit 70, and this A condensing lens group 85 for condensing excitation light applied to the plate of the phosphor 80 and fluorescence light emitted from the phosphor 80 and a heat sink 110 are provided. The heat sink 110 is mirrored by silver vapor deposition or the like to form a reflection surface that reflects light, and the phosphor 80 plate is disposed on the reflection surface. The plate of the phosphor 80 may be a sintered body, for example. Further, for example, without forming a reflecting surface on the heat sink 110, the plate of the phosphor 80 may be one in which the phosphor 80 is installed on a metal plate on which the reflecting surface is formed.

  Further, a cooling fan 244 as a cooling unit is disposed on the front panel 12 side of the fluorescent light emitting unit 100, and the heat sink 110 of the fluorescent light emitting unit 100 is cooled by the cooling fan 244.

  The red light source device 120 is arranged so that the optical axis of the excitation light incident on the fluorescent light emitting unit 100 and the optical axis of the light source intersect perpendicularly, and four of the two rows and three columns of laser groups located at the four corners. And a collimator lens group 125 that condenses the light emitted from the red light source 121. The red light source 121 is a red laser diode as a semiconductor light emitting element that emits red wavelength band light.

  Then, the red wavelength band light irradiated by the red light source device 120 passes through the dichroic mirror 173 and is irradiated to the microlens array 175 of the irradiation optical system 170 in the same manner as the green wavelength band light emitted from the fluorescent light emitting unit 100. Will be.

  Further, the blue light source device 130 is arranged so that the optical axis of the excitation light incident on the fluorescent light emitting unit 100 and the optical axis of the light source intersect perpendicularly, and is located in the center of the 2 × 3 laser group. A blue light source 131 composed of a plurality of light emitting elements, and a collimator lens group 135 that condenses the light emitted from the blue light source 131, and arranged in parallel with the red light source 121 located at the four corners of the 2 × 3 laser group. Are arranged. The blue light source 131 is a blue laser diode as a semiconductor light emitting element that emits blue wavelength band light.

  Then, the blue wavelength band light irradiated by the blue light source device 130 passes through the dichroic mirror 173 and is irradiated to the microlens array 175 of the irradiation optical system 170 in the same manner as the green wavelength band light emitted from the fluorescent light emitting unit 100. Will be.

  In the display element 51, a heat sink 190 for cooling the display element 51 is disposed between the display element 51 and the back panel 13, and the display element 51 is cooled by the heat sink 190.

  Further, in the vicinity of the front surface of the display element 51, light from the irradiation mirror 185 of the irradiation optical system 170 enters the display element 51 that is a DMD at an appropriate angle, is reflected by the display element 51, and is emitted from the display element 51. A condenser lens 195 that causes the ON light to enter the projection-side optical system 220 is disposed.

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

  Next, a structure in which emitted light for each element of a light source composed of a plurality of laser light emitting elements is irradiated to a predetermined irradiation region of the microlens array 175 will be described with reference to the drawings. FIG. 5 is a schematic plan view showing a structure in which emitted light of each element of a red light source composed of four laser light emitting elements is irradiated to a predetermined irradiation region of the microlens array 175. FIG. FIG. 6 is a schematic front view of the microlens array 175 showing that the emission light of each element of each light source is applied to the irradiation region of the microlens array 175. FIG.

  Red light from four red light sources 121, which are the red light source devices 120 (FIG. 5 shows two of the four red laser diodes installed on the same column) The collimator lens group 125 impinges on a predetermined irradiation region of the microlens array 175 of the irradiation optical system 170 positioned substantially in front of each other.

  It should be noted that a blue laser diode (FIG. 5 shows two of the two blue laser diodes installed) which is a blue light source device 130 disposed so that both sides are sandwiched between the red light source devices 120. The blue light from the above-described red laser diode (displaying one in the same column) is also incident on a predetermined irradiation region of the microlens array 175 positioned in front of each other by the collimator lens group 125.

  For this reason, each laser light from each red light source 121 and blue light source 131 passes through the dichroic mirror 173 described above and is perpendicularly incident on the microlens array 175, and as shown in FIG. Each light bundle is irradiated to a different area of the microlens array 175 in accordance with the arrangement of each light source. Note that the first region 175a, the third region 175c, the fourth region 175d, and the sixth region 175f in FIG. 6 indicate laser light spots emitted from the red light source 121, and the second region 175b and the sixth region 175b in FIG. A region of five regions 175e indicates a spot of laser light emitted from the blue light source 131.

  Further, in the green light source device described above, the laser light from the excitation light source 71 in the excitation light source unit 70 is converted into a substantially parallel light beam by the collimator lens 73, and each light beam is also substantially parallel to each other. Then, the light passes through the dichroic mirror 173 of the irradiation optical system 170, is condensed by the condensing lens group 85, and is irradiated to the phosphor 80, so that fluorescent light is generated from the phosphor 80.

  The fluorescent light emitted from the phosphor 80 is reflected by the dichroic mirror 173 as a light bundle in a substantially parallel state by the condenser lens group 85, and is incident on the substantially entire surface of the microlens array 175 perpendicularly. It is.

  As shown in FIG. 6, the microlens array 175 of the irradiation optical system 170 is incident from each semiconductor laser light emitting element in accordance with the number of red light sources 121 and blue light sources 131 that irradiate the microlens array 175 with laser light. The first region 175a to the sixth region 175f are formed in accordance with the position of light.

  The microlens array 175 includes a plurality of microlenses that are thick lenses whose optical axes are parallel to each other by a plurality of fine convex portions formed on both surfaces of a transmission portion. is there. The light emitted from each light source is divided by the microlens array 175, and the shape of each divided light is converted into a shape matching the shape of the display area of the display element 51 that is a predetermined surface.

  In the irradiation optical system 170, the light incident on the incident surface of each region of the microlens array 175 is condensed by the condenser lens 178 so as to be superimposed on the surface of the display element 51 that is a predetermined surface.

  When laser light is incident on the microlens array 175 of the irradiation optical system 170, interference fringes are generated on the surface of the display element 51 that is a predetermined surface. When a plurality of semiconductor laser light emitting elements are used as light sources, interference fringes with a certain width are formed according to the wavelength of the laser light. Therefore, even if the irradiation optical system 170 is used to synthesize a plurality of red laser diodes and blue laser diodes, the interference fringes of the same color laser light have the same pitch, and the interference fringes of the same pitch overlap. The image quality of the projected image is reduced by the interference fringes arranged in a fixed arrangement at a predetermined pitch. In particular, the red light source 121 having a long wavelength and a large number of elements is more likely to be uncomfortable to human eyes than blue light.

  For this reason, in the present embodiment, interference generated in the first region 175a, the third region 175c, the fourth region 175d, and the sixth region 175f in the microlens array 175 into which the laser beams from the four red light sources 121 are incident. The stripes have different orientations.

  The semiconductor laser has high directivity and polarization characteristics due to the difference in strain introduced into the active layer. For example, the semiconductor laser oscillates in parallel with the joint surface and becomes an elliptical light distribution. FIG. 7 is a diagram showing the arrangement of each light source according to the embodiment of the present invention. As shown in FIG. 7, in the arrangement of the four red light sources 121a, 121c, 121d, and 121f at the four corners in the laser group, the reference lasers have an angular difference sequentially with respect to one red light source 121a. Four red light sources 121a, 121c, 121d, so that the direction of the light distribution of the ellipse is sequentially different for each element by an angular difference obtained by sequentially dividing 180 degrees by the number of elements with respect to the arrangement angle of the light emitting elements. The element 121f is arranged in a state of being rotated around the optical axis of the emitted light from each light source. For example, with respect to the arrangement angle of the red light source 121a, the other one red light source 121f is rotated 45 degrees counterclockwise, and another red light source 121c is rotated 90 degrees counterclockwise, and the other red light sources remaining. The light source 121d is fixed at a position rotated 135 degrees counterclockwise. The two blue light sources 131 located in the center are also arranged and fixed at different angles.

  FIG. 8 is an explanatory diagram of light distribution characteristics of light from each light source to the microlens array according to the embodiment of the present invention. The direction of light distribution from each light source in the first region 175a, the second region 175b, the third region 175c, the fourth region 175d, the fifth region 175e, and the sixth region 175f of the microlens array 175 is shown. As shown in FIG. 7, the light from the red light source 121 arranged with an angle difference of 45 degrees is, depending on the arrangement of each element, if the light source is red light source 121, elliptical light distributions 176 a, 176 c, 176 d, and 176 f are respectively Different orientations. For the blue light source 131, the elliptical light distribution 176b and the light distribution 176e are in different directions.

  Thus, for example, red laser light incident on the microlens array 175 is light having an elliptical light distribution rotated by an angle of 45 degrees around the optical axis. FIG. 9 is an explanatory view exemplarily showing interference fringes generated in an optical image by light from each issue element according to the embodiment of the present invention. FIG. 9 shows that bright and dark areas are formed at equal intervals in the optical image, and interference fringes are formed in the image. As shown in FIG. 9A, the interference fringes 401 generated through the first region 175a are in the horizontal direction, whereas in the third region 175c as shown in FIG. 9B. The interference fringes 402 are in the vertical direction, and as shown in FIG. 9 (c), the interference fringes 403 generated in the fourth region 175d are rotated 45 degrees counterclockwise, as shown in FIG. 9 (d), The interference fringes 404 generated in the sixth region 175f are interference fringes rotated 135 degrees counterclockwise.

  Then, by setting the interference fringes 401, 402, 403, and 404 generated in the respective regions of the microlens array 175 in different directions, the interference fringes of the respective laser beams are dispersed in the synthesized light 405 when the respective lights are superimposed, so that they are not noticeable. be able to.

  Accordingly, the light emitted from each light source of the light source device 60 is overlapped by the microlens array 175 and the condenser lens 178, and when irradiating light from each element of each light source, each element has an angle different from other laser light emitting elements. By changing the direction of the interference fringes for each region to make the combined light 405, the number of steps of the interference fringes is increased, and the interference fringes become inconspicuous by the dispersion of the fringes. I can.

  In the present embodiment, the red light source 121 having a long wavelength and four elements has been described with respect to the configuration in which the interference fringe pattern is changed. For example, as a configuration for making the interference fringe inconspicuous, It is possible to make the interference fringe inconspicuous even if at least one element is rotated without rotating the four elements at different angles and changing the arrangement.

  Also, the interference fringes can be made inconspicuous if the blue light source 131 having a short wavelength composed of two elements arranged so as to be sandwiched between the red light sources 121 is also arranged at different angles.

  As described above, according to the present embodiment, a light source device 60 suitable for the projector 10, and a light source device 60 having a simple structure and reduced interference fringes due to laser light with a simple structure, a light source device 60 suitable for the projector 10, and interference It is possible to provide a projector 10 that enables small and high-intensity projection that prevents image quality deterioration due to fringes.

  Further, according to the present embodiment, the interference fringes of the plurality of laser light emitting elements are overlapped with rotation at an equal angle, so that the interference fringes can be effectively made inconspicuous.

  Then, according to the present embodiment, each color light is effectively incident on the microlens array 175 by causing the light emitted from the light source to irradiate a predetermined irradiation area of the microlens array 175 via the dichroic mirror 173. Can do.

  Furthermore, according to the present embodiment, it is possible to efficiently combine laser beams from a plurality of laser light emitting elements and superimpose them so as to condense the interference fringes.

  According to the present embodiment, interference fringes caused by the red light source 121 having a long wavelength and a large number of elements that are likely to cause discomfort to human eyes can be efficiently reduced.

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

The invention described in the first claim of the present application will be appended below.
[1] A light source comprising a plurality of laser light emitting elements is provided,
Among the plurality of laser light emitting elements, the light distribution direction of emitted light emitted from one laser light emitting element is different from the direction of light distribution of emitted light emitted from another laser light emitting element among the plurality of laser light emitting elements. The light source device, wherein the plurality of laser light emitting elements are arranged differently.
[2] The one laser light emitting element is arranged by being rotated at a different angle from the other laser light emitting elements around the optical axis of light emitted from the one laser light emitting element. The light source device according to [1] above.
[3] The plurality of laser light emitting elements are arranged at positions sequentially rotated by an angular difference obtained by equally dividing 180 degrees by the number of the laser light emitting elements with respect to an arrangement angle of a reference laser light emitting element. The light source device according to [2] above, wherein
[4] A microlens array and a condensing lens for superimposing light from each of the plurality of laser light emitting elements and condensing the superimposed light on the surface of the display element that is a predetermined surface. The light source device according to any one of [1] to [3], wherein the light source device is characterized.
[5] The light source device according to [4], wherein the light emitted from the light source is irradiated to a predetermined irradiation region of the microlens array via a dichroic mirror.
[6] The light source device according to any one of [1] to [5], wherein the plurality of laser light emitting elements are light sources that emit light in the same wavelength band.
[7] a light source device;
A display element;
A projection-side optical system that projects an image emitted from the display element onto a screen;
Projector control means for controlling the light source device and the display element,
A projector, wherein the light source device is the light source device according to any one of [1] to [6].

DESCRIPTION OF SYMBOLS 10 Projector 11 Top panel 12 Front panel 13 Rear panel 14 Right side panel 15 Left side panel 16 Daylighting window 17 Exhaust hole 18 Intake hole 19 Lens cover 20 Various terminals 21 Input / output connector part 22 Input / output interface 23 Image conversion part 24 Display encoder 25 Video RAM
26 Display Drive Unit 31 Image Compression / Expansion Unit 32 Memory Card 35 Ir Reception Unit 36 Ir Processing Unit 37 Key / Indicator Unit 38 Control Unit
DESCRIPTION OF SYMBOLS 41 Light source control circuit 43 Cooling fan drive control circuit 45 Lens motor 47 Sound processing part 48 Speaker 51 Display element 60 Light source device 62 AD converter 70 Excitation light source part 71 Excitation light source 73 Collimator lens 75 Reflective mirror group 78 Heat sink 80 Phosphor 85 Condensing Lens group 100 Fluorescent light emitting unit 110 Heat sink 120 Red light source device 121 Red light source 125 Condensing lens group
130 Blue light source device 131 Blue light source 135 Collimator lens group 170 Irradiation optical system 173 Dichroic mirror 175 Microlens array 175a to f Irradiation region 176a to f Light distribution 178 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 244 Heat sink 261 Cooling fan 401 Interference fringe 402 Interference fringe 403 Interference fringe 404 Interference fringe 405 Composite light

Claims (7)

A light source comprising a plurality of laser light emitting elements,
Among the plurality of laser light emitting elements, the light distribution direction of emitted light emitted from one laser light emitting element is different from the direction of light distribution of emitted light emitted from another laser light emitting element among the plurality of laser light emitting elements. The light source device, wherein the plurality of laser light emitting elements are arranged differently.   2. The one laser light emitting element is disposed by being rotated at an angle different from that of the other laser light emitting elements around an optical axis of light emitted from the one laser light emitting element. The light source device according to 1.   The plurality of laser light emitting elements are arranged at positions sequentially rotated by an angular difference obtained by equally dividing 180 degrees by the number of the laser light emitting elements with respect to an arrangement angle of a reference laser light emitting element. The light source device according to claim 2.   A microlens array and a condensing lens are provided to superimpose light from each element of the plurality of laser light emitting elements and condense the superposed light on a surface of a display element that is a predetermined surface. The light source device according to claim 1.   The light source device according to claim 4, wherein the light emitted from the light source is irradiated to a predetermined irradiation region of the microlens array via a dichroic mirror.   6. The light source device according to claim 1, wherein the plurality of laser light emitting elements are light sources that emit light in the same wavelength band. A light source device;
A display element;
A projection-side optical system that projects an image emitted from the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The projector according to claim 1, wherein the light source device is the light source device according to claim 1.

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