JP6135904B2 - Light source device and projector - Google Patents

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 or a liquid crystal plate to display a color image on a screen.

  In such projectors, a projector having a high-intensity discharge lamp as a light source has been mainly used in the past. However, in recent years, red, green, and blue light-emitting diodes and laser diodes, or solid-state light-emitting elements such as organic ELs have been used as light sources. Developments have been made to use 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 quality could be degraded.

  For this reason, laser light is emitted from a splitting unit that splits the wavefront emitted from the light source, a conversion unit that rotates the polarization plane of the split light beam of the wavefront, and a combining unit that superimposes the wavefronts of the light beams with different polarization plane orientations. A light source device combined with an element has also been proposed (for example, Patent Document 1).

JP 2008-185628 A

  However, in Patent Document 1, since light emitted from a light source is once divided, and a predetermined surface is irradiated so as to overlap after rotating the polarization plane of the divided light, the light source device is complicated and easy to manufacture. It was not.

  The present invention eliminates the above-mentioned drawbacks, and provides a light source device suitable for a projector using a plurality of light sources and having a simple structure as a small and high-brightness light source, and a projector capable of small and high-brightness projection. Is.

In the light source device of the present invention, a plurality of light sources that are semiconductor laser light-emitting elements and a plurality of convex microlenses arranged so that their optical axes are parallel and not coincide with each other are arranged on both surfaces. of shine and a microlens array that exits the light, the light source device and a condenser lens for converging to overlap a predetermined surface emitted light of each light source that has passed through the microlens array, the said microlens array The lens characteristics of the microlens are different for each region irradiated with each of the light emitted from each light source.

  A projector according to the present invention includes a light source device, a display element that forms an optical image when irradiated with light from the light source device, a projection-side optical system that projects an optical image formed by the display element on a screen, Projector control means having light source control means and display element control means of the light source device, wherein the light source device is the light source device of the present invention.

  According to the present invention, the lens characteristics of the microlens array that equalizes the emitted light from each light source, which is a semiconductor laser light emitting element, are made different for each light source light, and the light source lights having different interference fringe pitches in the laser light are superimposed. Therefore, it is possible to provide a laser light source device and a projector that make interference fringes inconspicuous.

1 is an external perspective view showing a projector according to an embodiment of the present invention. It is a functional block diagram of the projector which concerns on embodiment of this invention. 1 is a schematic plan view showing an internal structure of a projector according to an embodiment of the invention. 1 is a schematic plan view showing an optical system of a projector according to an embodiment of the invention. It is a schematic diagram explaining one state of the light source light in the light source device of the projector according to the embodiment of the present invention. It is explanatory drawing regarding the irradiation area | region of the laser light source in the light source device of the projector which concerns on embodiment of this invention. It is a plane schematic diagram which shows the area | region of the microlens array which concerns on embodiment of this invention. It is the plane schematic diagram and side surface schematic diagram which show the microlens array which concerns on embodiment of this invention. It is a side surface schematic diagram explaining the lens simple substance in the micro lens array concerning an embodiment of the invention. It is explanatory drawing which shows the interference fringe by each light source device which concerns on embodiment of this invention exemplarily. It is explanatory drawing which shows the projection screen of the projector which concerns on embodiment of this invention exemplarily.

  Hereinafter, modes for carrying out the present invention will be described. 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 section 37 is provided on the top panel 11 of the casing. The key / indicator section 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.

  Further, on the rear surface of the casing, various terminals 20 such as an input / output connector section and a power adapter plug 20 provided with a USB terminal, a D-SUB terminal for inputting image signals, an S terminal, an RCA terminal, an audio output terminal, etc. on the rear panel. Is 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 is composed of a ROM in which operation programs such as a CPU and various settings are fixedly stored, a RAM used as a work memory, and the like. Yes.

  Then, the image signal of various standards input from the input / output connector unit 21 by the projector control means is in a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). After being converted so as to be unified into an image signal, it is output to the display encoder 24.

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

  The display drive unit 26 functions as display element control means, and drives the display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal output from the display encoder 24. By irradiating the display element 51 with the light bundle emitted from the light source device 60, a light image is formed by the reflected light of the display element 51, and the image is displayed on a screen (not shown) via a projection-side optical system described later. Is projected and displayed. 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 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. A process for enabling display of a moving image or the like based on the image data output to the display encoder 24 and stored in the memory card 32 is performed.

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

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

  Further, the control unit 38 controls a light source control circuit 41 as a light source control means, and the light source control circuit 41 is configured so that light of a predetermined wavelength band required at the time of image generation is emitted from the light source device 60. The light source device 60 is controlled. The light source device 60 includes a green light source, a red light source device 120, and a blue light source device 130 including an excitation light source unit 70 including a blue laser diode and a fluorescent light emitting unit 100 including a phosphor plate.

  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. In addition, 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 (not shown) 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.

  This light source device 60 is on the optical axis of the light source emitted from the excitation light source unit 70 and 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. A green light source device including a fluorescent light emitting unit 100 disposed in the vicinity of the front panel 12, and a dichroic mirror 173 disposed between the excitation light source unit 70 and the fluorescent light emitting unit 100, and the excitation light source unit 70 and the fluorescent light emitting unit. 100, a red light source device 120 and a blue light source device 130, and a condensing lens 178, a microlens array 175, and an irradiation mirror 185 as an irradiation optical system 170.

  The excitation light source unit 70 converts the 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 the emitted light from each excitation light source 71 by 90 degrees in the direction of the front panel 12. A reflecting mirror group 75 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 laser light-emitting elements in two rows and three columns, are arranged in a matrix, and the output from each blue laser diode is on the optical axis of each blue laser diode. A collimator lens 73, which is a condenser lens that converts incident light into parallel light, is arranged. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a staircase pattern, and reduces the cross-sectional area of the light bundle emitted from the excitation light source unit 70 in one direction and emits it to the fluorescent light emitting unit 100.

  Excitation light emitted from the excitation light source unit 70 passes through a dichroic mirror 173 that transmits blue and red and reflects green, and further passes through a condenser lens group 85 to be irradiated on a phosphor 80 that is a light emitting plate. The The green wavelength band light that is excited and emitted by the phosphor 80 when the excitation light is applied to the phosphor 80 is emitted in all directions and directly to the dichroic mirror 173 side or will be described in detail later. After being reflected by the reflection surface on the front heat sink 110 side, it is 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 is incident on the microlens array 175.

  A cooling fan 261 is disposed between the heat sink 78 and the back panel 13, and the excitation light source unit 70, the red light source device 120, and the blue light source device 130 are cooled by the cooling fan 261 and the heat sink 78. 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 is arranged so that it is parallel to the front panel 12, that is, the phosphor 80 plate arranged so as to be orthogonal to the optical axis of the emitted light from the excitation light source unit 70, and the phosphor 80 plate A condensing lens group 85 for condensing the excitation light irradiated onto the fluorescent light and the fluorescent light emitted from the phosphor 80, and a heat sink 110. 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. Further, a cooling fan 244 as cooling means 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 includes a red light source 121 disposed so that the optical axis of the excitation light incident on the fluorescent light emitting unit 100 and the optical axis intersect perpendicularly, and a collimator lens 125 that collects the emitted light from the red light source 121, . The red light source 121 is a red laser diode as a semiconductor laser light emitting element that emits light in the red wavelength band, and four LEDs are arranged side by side vertically and horizontally.

  The red wavelength band light irradiated by the red light source device 120 is incident on the microlens array 175 of the irradiation optical system 170 in the same manner as the green wavelength band light transmitted through the dichroic mirror 173 and emitted from the fluorescent light emitting unit 100. The Rukoto.

  The blue light source device 130 also has a blue light source 131 arranged so that the optical axis of the excitation light incident on the fluorescent light emitting unit 100 and the optical axis intersect perpendicularly, and a collimator lens 135 that collects the emitted light from the blue light source 131. And arranged so as to be aligned with the red light source device 120. The blue light source 131 is a blue laser diode as a semiconductor laser light emitting element that emits light in a blue wavelength band, and two are arranged side by side.

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

  A heat sink 190 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 makes the ON light incident on 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 lens having a zoom function, and is movable by a lens motor. Zoom adjustment and focus adjustment can be performed by moving the lens group 235.

The state of light of the optical system in the light source device 60 will be described in detail with reference to FIGS.
Red light from four red light sources 121, which are the red light source devices 120 (FIG. 5 shows the upper two), is made into a substantially parallel beam bundle by the collimator lens 125. Is incident on the microlens array 175.

  The blue light from the blue laser diodes (only one of the upper stage in FIG. 5), which is the two blue light sources 131 as the blue light source device 130, is also substantially parallel by the collimator lens 135. A bundle is made incident on the microlens array 175.

  Therefore, as shown in FIG. 6, the laser light from each red light source 121 and each blue light source 131 passes through the dichroic mirror 173 and is perpendicular to the microlens array 175. Different areas of the microlens array 175 are irradiated according to the arrangement of each light source.

  Further, in the green light source device, the laser light from the excitation light source 71 in the excitation light source unit 70 is made such that each light bundle is made substantially parallel by the collimator lens 73 and each light bundle is made substantially parallel to each other. The light passes through the dichroic mirror 173, is collected by the condenser lens group 85, and is irradiated on the phosphor 80, and 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 enters the entire surface of the microlens array 175 perpendicularly. It is.

  As shown in FIG. 7, the microlens array 175 is adapted to the number of red light sources 121 and blue light sources 131 that irradiate the microlens array 175 with laser light, and to the position of incident light from each semiconductor laser light emitting element. Thus, the first region 175a to the sixth region 175f are divided into different lens characteristics of the microlens for each region.

  The lens characteristics (focal length) of each microlens unit are determined by the thickness t of each microlens that is a thick lens, the curvature radius r of the convex surface on the incident side and the outgoing side, and the refractive index based on the material of the lens array. As a result, the state of the emitted light changes.

  As shown in FIG. 8 (a), the microlens array 175 forms spherical convex portions at corresponding positions on both surfaces of the thick transparent plate, and the thick biconvex lens as shown in FIG. 8 (b). This is a state in which a plurality of convex lenses having a rectangular shape obtained by cutting the periphery of the lens are arranged adjacent to each other vertically and horizontally. Each biconvex lens is a microlens. As shown in FIG. 9, the microlens array 175 has an incident surface of one microlens at an angle within a predetermined range from the perpendicular to the surface of the microlens array 175. All of the light incident on the convex portion is emitted so as to diffuse from the convex portion on the emission surface side at a position corresponding to the convex portion of the incident surface of the microlens.

  And even if the light incident on each microlens is in a parallel state at the time of incidence, it becomes diffused light when emitted from each microlens, and is overlapped with the light transmitted through other microlenses to be uniformed. The light is condensed so as to overlap on the surface of the display element 51 which is a predetermined surface by 178.

  For this reason, the light bundle that is in the range of the predetermined area incident on the microlens array 175 has nonuniformity in its light density, and the amount of light incident on each microlens in the range irradiated with the light bundle is different. Even if there is, the light emitted from each microlens is overlapped on a predetermined surface by the condenser lens 178, so that the illuminance by the light transmitted through the microlens array 175 on the predetermined surface is made uniform overall Can do.

  Further, when laser light is incident on the irradiation optical system 170, interference fringes are generated in the irradiation light on the surface of the display element 51 serving as a predetermined surface. When a plurality of semiconductor laser light emitting elements are used as the light sources, laser light is emitted. Depending on the wavelength, interference fringes with a certain width are formed. Therefore, even if the irradiation optical system 170 uses a plurality of red laser diodes and blue laser diodes, the interference fringes of the laser light of the same color have the same pitch. The image quality of the projected image is reduced by the interference fringes.

  Therefore, in the present embodiment, 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 are 4. In each region, the thickness t or the radius of curvature r of the microlens which is a thick biconvex lens is made different for each region, thereby causing interference by red light transmitted through the first region 175a as shown in FIG. The pitch of the interference fringes in the fringes, the interference fringes due to the red light transmitted through the third region 175c, the interference fringes due to the red light transmitted through the fourth region 175d, and the interference fringes due to the red light transmitted through the sixth region 175f Is changing.

  Accordingly, when the microlens array 175 having different lens characteristics for each region is transmitted and the light from the four red light sources 121 is superimposed on a predetermined surface by the condenser lens 178, each interference by the four red light sources 121 is caused. The change in the contrast of the stripes becomes a change in a plurality of stages, and the line width of each stripe pattern becomes narrow, making it difficult to identify the stripes on the projected image surface as shown in FIG. 11, and improving the image quality of the projected image. Can do.

  Also, in the second region 175b and the fifth region 175e into which the laser beams from the two blue light sources 131 are incident, the thickness t or the radius of curvature r of the microlens is different for each region, and the two blue light sources 131 are different. A pitch difference is also provided in the interference fringes due to the laser beam.

  Each microlens in each region is a microlens array 175 having microlenses having the same thickness t and the same radius of curvature r and having the same lens characteristics in each of the predetermined regions 175a to 175f.

  In the above-described embodiment, the microlens array 175 is entirely formed with protrusions on both sides of a single thick transparent plate, although the thickness t or the radius of curvature r of the microlens is different for each region. However, the invention is not limited to the case where the transparent plate is made of a different material for each region, a glass material having a different refractive index is used for each region, and the thickness t and the curvature radius r of the microlens are the same. A microlens array in which microlenses having different lens characteristics due to a difference in refractive index are formed, and one microlens array 175 constituting the first region 175a to the sixth region 175f by arranging the microlens arrays for each region; Sometimes.

  Further, the size of each microlens is different depending on the region without being limited to the case where the microlens thickness t or the radius of curvature r or the refractive index of the glass material is changed for each region to change the focal length of the microlens. The pitch of the microlens is changed so that the brightness of the lens in the lens characteristics is changed when the region is different.

  As described above, when the light transmitted through the microlens array 175 by changing the lens characteristics of the microlens is condensed on the surface of the display element 51 which is a predetermined surface via the condenser lens 178 or the like, the microlens array 175 is obtained. The pitch of the interference fringes of the laser light transmitted through the different areas changes, and the light irradiation range on the predetermined surface also changes.

  Further, in the light source device 60 including the irradiation optical system 170 such as the microlens array 175 and the condenser lens 178, the area of the display effective region which is the micromirror surface of the display element 51 as the reference value of the irradiation area at the position of the predetermined surface On the other hand, in the area ratio, for example, a predetermined magnification is set to a wide range of about 10% so that all the micromirrors can be easily irradiated with the light source light.

  For this reason, the light source light is also irradiated excessively around the micromirror surface of the display element 51, but in this embodiment, each region is changed by the change in lens characteristics of the microlens with respect to the reference value. When the irradiation area by each laser beam changes, the width of the interference fringes is changed so that the minimum irradiation area is within the range of decrease of less than 10% with respect to the reference area by changing the irradiation area. Yes.

  As described above, the reference value is set to an area that is 10% wider than the mirror area of the display element 51, and the change amount of the irradiation area due to the lens characteristics is set to a reduction range of less than 10% with respect to the reference value. Even when the irradiation area by the light transmitted through the region is minimized, the projection image can be reliably formed by irradiating the entire mirror surface of the display element 51 with light.

  Therefore, in the present embodiment, in the microlens array 175 that uniformizes the light emitted from each light source of the light source device 60, the lens characteristics of the microlens are changed for each region irradiated with the light from each light source, When the interference fringe pattern of the laser light emitted from the light source is changed and the laser light from each light source is superimposed on a plane at a predetermined position, the number of steps of the interference fringe is increased and the fringe spacing is increased. The interference fringes can be made inconspicuous by making them fine.

  The projector 10 using the light source device 60 can improve the image quality of the projection image by making the stripe pattern in the projection image inconspicuous.

  Further, in the microlens array 175, when the microlens thickness t or the radius of curvature r is different for each region, the microlens array 175 can be easily manufactured, and the lens characteristics of the microlens can be easily changed. It is easy to make the interference fringes inconspicuous.

  Further, in the microlens array 175, it is very easy to change the pitch of the microlens for each region, and it is easy to change the lens characteristics of the microlens and make the interference fringes inconspicuous. Easy.

  Further, in the microlens array 175, the microlens array 175 having a different refractive index for each region can be easily manufactured by arranging microlens arrays having different glass materials, and the lens characteristics of the microlens can be easily changed. It is easy to make the interference fringes inconspicuous.

  And when changing the lens characteristics for each region and the irradiation range of the predetermined surface is different, setting the reference value for the irradiation area and adjusting the change range of the irradiation area makes it easy to set the lens characteristics differently, It is easy to increase the health of the interference fringes without reducing the illuminance on the irradiated surface.

  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 spirit 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 plurality of light sources that are semiconductor laser light emitting elements;
A plurality of microlenses arranged so that their optical axes are parallel to each other and not coincident with each other, and a microlens array for uniformizing the emitted light from each of the light sources, and
In a light source device comprising: a condensing lens that condenses the emitted light of each light source that has been transmitted through the microlens array and made uniform on a predetermined surface;
The light source device according to claim 1, wherein the lens characteristics of the microlens are different for each region irradiated with light emitted from the light sources of the microlens array.
[2] The micro lens array according to [1], wherein the micro lens has different lens characteristics due to a difference in thickness of the micro lens for each region irradiated with each light source light. The light source device described.
[3] The microlens array is characterized in that the lens characteristics of the microlens differ depending on the radius of curvature of the lens surface for each region irradiated with each light source light. Or the light source device as described in said [2].
[4] The microlens array is characterized in that the lens characteristics of the microlens differ depending on the pitch at which each microlens is formed in each region irradiated with each light source light. ] To [3].
[5] The microlens array is characterized in that the lens characteristics of the microlens are different by using a material having a different refractive index for each region irradiated with each light source light. Thru | or the light source device in any one of said [4].
[6] The above-mentioned [1] to [1], wherein the lens characteristics of the microlens are different so that an area of each light source light irradiated on the predetermined surface due to a change in lens characteristics changes for each light source. [5] The light source device according to any one of [5].
[7] The lens characteristic of the microlens is set such that the area of each light source light irradiated on the predetermined surface due to the change of the lens characteristic is set larger than the area of the display effective area of the display element by a predetermined magnification. The light source device according to any one of [1] to [6], wherein the area ratio is within a reduction range less than the predetermined magnification with respect to a reference plane.
[8] a light source device;
A display element that forms an optical image by being irradiated with light from the light source device;
A projection-side optical system that projects an optical image formed by the display element onto a screen;
Projector control means having light source control means and display element control means of the light source device, wherein the light source device is the light source device described in any one of [1] to [7]. projector.

DESCRIPTION OF SYMBOLS 10 Projector 11 Top panel 12 Front panel 13 Rear panel 14 Right side panel 15 Left side panel 17 Exhaust hole 18 Intake hole 19 Lens cover 20 Various terminals 21 Input / output connector part 22 Input / output interface 23 Image conversion part 24 Display encoder 25 Video RAM
26 display drive unit 31 image compression / decompression unit 32 memory card 35 Ir reception unit 36 Ir processing unit 37 key / indicator unit 38 control unit 41 light source control circuit 43 cooling fan drive control circuit 45 lens motor 47 audio processing unit 48 speaker 51 display element 60 light source device 70 excitation light source unit 71 excitation light source 73 collimator lens 75 reflection mirror group 78 heat sink 80 phosphor 85 condenser lens group 100 fluorescent light emission unit 110 heat sink 120 red light source device 121 red light source 125 collimator lens 130 blue light source device 131 blue light source 135 Collimator lens 170 Irradiation optical system 173 Dichroic mirror 175 Micro lens array 175a First region 175b Second region 175c Third region 175d Fourth region 175e Fifth region 1 5f sixth region 178 a condenser lens 185 irradiates the mirror 190 heat sink 220 projection side optical system 225 fixed lens group 235 movable lens group 244 cooling fan

Claims (8)

A plurality of light sources that are semiconductor laser light emitting elements;
A plurality of convex microlenses each optical axis is arranged so as not parallel and coincident with each other are arranged on both sides, and a microlens array wherein that shines out of the light from each light source,
In a light source device comprising a condensing lens that condenses the emitted light of each light source that has passed through the microlens array so as to overlap a predetermined surface,
The light source device according to claim 1, wherein the lens characteristics of the microlens are different for each region irradiated with light emitted from the light sources of the microlens array.   2. The light source device according to claim 1, wherein the microlens array has different lens characteristics of the microlens due to a difference in thickness of the microlens for each region irradiated with each light source light. .   3. The microlens array according to claim 1, wherein the lens characteristics of the microlens differ depending on the radius of curvature of the lens surface for each region irradiated with each light source light. 4. Light source device.   4. The microlens array according to claim 1, wherein the microlens array has different microlens characteristics due to different pitches for forming each microlens for each region irradiated with each light source light. The light source device according to any one of the above.   5. The microlens array is characterized in that the lens characteristics of the microlens are different by using a material having a different refractive index for each region irradiated with each light source light. The light source device according to any one of the above.   6. The lens characteristic of the micro lens is different so that the area of each light source light irradiated on the predetermined surface due to a change in lens characteristics changes for each light source. A light source device according to claim 1.   The lens characteristic of the microlens is a reference surface in which the area of each light source light irradiated on the predetermined surface due to a change in lens characteristics is set to be large at a predetermined magnification with respect to the area of the display effective area of the display element. On the other hand, the light source device according to any one of claims 1 to 6, wherein the area ratio is within a reduction range less than the predetermined magnification. A light source device;
A display element that forms an optical image by being irradiated with light from the light source device;
A projection-side optical system that projects an optical image formed by the display element onto a screen;
A projector control means having a light source control means and a display element control means of the light source device, wherein the light source device is the light source device according to any one of claims 1 to 7.

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