JP2019066811A - Light source device and projection device - Google Patents

Abstract

To provide a light source device which can be made compact as a whole.SOLUTION: A light source device 60 includes: an excitation light source which emits excitation light; and a fluorescent wheel 101 having a base material 102, a fluorescent light emission area 103 formed on one side of the base material 102 and emitting fluorescent light of a wavelength band different from the excitation light, and a reflection area 104 arranged along with the fluorescent light emission area 103 formed on the one side of the base material 102 and reflecting the excitation light. An emission position of the excitation light in the fluorescent light emission area 103 and an emission position of the excitation light in the reflection area 104 are different from each other in radial position of the fluorescent wheel 101.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light source device and a projection device including the light source device.

  2. Description of the Related Art Today, data projectors are widely used as image capturing devices for projecting an image or the like based on image data stored in a screen of a personal computer, a video screen, a memory card or the like on a screen. This projection apparatus condenses light emitted from a light source on a micro mirror display element called a DMD (digital micro mirror device) or a liquid crystal plate, and displays a color image on a screen.

  In such projectors, conventionally, the main source is a discharge lamp with high luminance as a light source, but in recent years, various projectors using a light emitting diode, a laser diode, an organic EL, or a phosphor as a light source Development is being made.

  The projector disclosed in Patent Document 1 includes an excitation light source that is a blue light source, a green light emitting region that emits green wavelength band light using excitation light from the excitation light source, and diffuse reflection that reflects the excitation light from the excitation light source A fluorescent wheel including a region, a rotationally controllable light blocking wheel disposed on an optical path of light emitted from the fluorescent wheel, and a red light source.

Patent No. 5495023

  The light blocking wheel in the projection device of Patent Document 1 has a light blocking area for blocking blue light that is mixed with fluorescent light and emitted from the fluorescent wheel, and a transmission area. However, in a projection device equipped with a light blocking wheel, the light source wheel and the projection device may be enlarged due to the light blocking wheel.

  An object of the present invention is to provide a light source device capable of miniaturizing the entire device, and a projection device provided with the light source device.

  The light source device of the present invention comprises: an excitation light source for emitting excitation light; a base material; a fluorescence emission area formed on one surface of the base material and emitting fluorescence light in a wavelength band different from that of the excitation light; And a fluorescent wheel including a reflection area for reflecting the excitation light disposed in parallel with the fluorescence emission area on one side of the substrate, and the irradiation position of the excitation light in the fluorescence emission area The irradiation position of the excitation light in the reflection area is characterized in that the positions of the fluorescent wheel in the radial direction are different from each other.

  Further, a projection apparatus according to the present invention projects the light source device described above, a display element which is irradiated with light source light from the light source device to form image light, and the image light emitted from the display element on a screen. A projection side optical system, the display element, and a projection device control unit for controlling the light source device are characterized.

  According to the present invention, it is possible to provide a light source device capable of miniaturizing the entire device, and a projection device provided with the light source device.

FIG. 1 is an external perspective view showing a projection device according to Embodiment 1 of the present invention. It is a figure which shows the functional circuit block of the projection apparatus which concerns on Embodiment 1 of this invention. It is a plane schematic diagram which shows the internal structure of the projection apparatus which concerns on Embodiment 1 of this invention. It is a front schematic diagram which shows each division | segmentation dichroic mirror of the light source device which concerns on Embodiment 1 of this invention, (a) shows a 1st division | segmentation dichroic mirror, (b) shows a 2nd division | segmentation dichroic mirror. It is a schematic diagram explaining the fluorescent plate of the light source device which concerns on Embodiment 1 of this invention, (a) is a front view of a fluorescent plate, (b) is sectional drawing which shows an AA cross section. It is a plane schematic diagram which expands and shows the light source device which concerns on Embodiment 1 of this invention, and it shows a mode that the green wavelength band light is radiate | emitted. It is a plane schematic diagram which expands and shows the light source device which concerns on Embodiment 1 of this invention, and shows a mode that blue wavelength band light is radiate | emitted. It is a plane schematic diagram which expands and shows the irradiation spot periphery of the fluorescence board apparatus which concerns on Embodiment 1 of this invention, (a) shows a mode that blue wavelength band light is irradiated to a fluorescence emission area, (b) is fluorescence A state where fluorescent light is emitted by the light emitting region is shown, and (c) is a state where blue wavelength band light is reflected by the reflecting member. It is a plane schematic diagram which expands and shows the light source device which concerns on Embodiment 2 of this invention, and shows a mode that the blue wavelength band light is radiate | emitted. It is a schematic diagram explaining the fluorescent plate of the light source device which concerns on Embodiment 2 of this invention, (a) is a front view of a fluorescent plate, (b) is a side view of a fluorescent plate. It is a plane schematic diagram which expands and shows the irradiation spot periphery of the fluorescence board apparatus which concerns on Embodiment 2 of this invention, (a) shows a mode that blue wavelength band light is irradiated to a fluorescence emission area, (b) is a diffusion. It shows how blue wavelength band light is reflected by the reflection area. It is a schematic diagram which shows the light source device which concerns on Embodiment 3 of this invention, (a) is a top view which shows a mode that an excitation light irradiates a fluorescence emission area | region, (b) is a front view of a fluorescent plate. c) is a cross-sectional view showing a B-B cross section of (b). It is a schematic diagram which shows the light source device which concerns on Embodiment 4 of this invention, (a) is a top view which shows a mode that excitation light irradiates a fluorescence emission area | region, (b) is a front view of a fluorescent plate. c) is a cross-sectional view showing a cross section taken along the line C-C in (b).

(Embodiment 1)
Hereinafter, modes for carrying out the present invention will be described. FIG. 1 is an external perspective view of a projection apparatus 10 according to a first embodiment of the present invention. In the first embodiment of the present invention, the left and right in the projection device 10 indicate the left and right direction with respect to the projection direction, and the front and rear indicate the screen side direction of the projection device 10 and the front and back direction with respect to the traveling direction Indicates

  As shown in FIG. 1, the projection device 10 has a lens cover 19 which covers the projection opening on the side of the front panel 12 which is a substantially rectangular parallelepiped shape and which is a front side plate of the housing. A plurality of intake holes 18 and exhaust holes 17 are provided. Furthermore, although not shown, an Ir receiver for receiving a control signal from a remote controller is provided.

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

  Furthermore, the rear panel of the housing is provided with various terminals 20 such as an input / output connector portion provided with a USB terminal, a D-SUB terminal for image signal input, an S terminal, an RCA terminal and the like and a power adapter plug. Further, a plurality of air intake holes are formed in the back panel. A plurality of exhaust holes 17 are formed in the right side panel (not shown) which is the side plate of the housing and the left side panel 15 which is the side plate shown in FIG. Further, an air intake hole 18 is formed at a corner near the rear panel of the left side panel 15.

  Next, the projection apparatus control unit of the projection apparatus 10 will be described using the functional circuit block diagram of FIG. The projection device control unit includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like. Image signals of various standards input from the input / output connector unit 21 are converted so as to be unified into image signals of 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 output, 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 storage content 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. The display driving unit 26 appropriately drives the display element 51 which is a spatial light modulation element (SOM) at a frame rate according to the image signal output from the display encoder 24. Then, the projection device 10 irradiates the light beam emitted from the light source device 60 to the display element 51 via the light guide optical system to form an optical image with the reflected light of the display element 51, and the projection described later An image is projected and displayed on a screen (not shown) via the side optical system. The movable lens group 235 of this 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 of sequentially writing the luminance signal and the color difference signal of the image signal by data such as ADCT and Huffman coding to a memory card 32 as a removable recording medium. Furthermore, the image compression / decompression unit 31 reads out the image data recorded on the memory card 32 in the reproduction mode, and decompresses the individual image data constituting a series of moving images in units of one frame. The image compression / decompression unit 31 outputs the image data to the display encoder 24 via the image conversion unit 23, and performs processing to enable display of a moving image or the like based on the image data stored in the memory card 32. .

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

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

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

  The control unit 38 also controls a light source control circuit 41 as light source control means. The light source control circuit 41 emits red, green and blue wavelength band lights at a predetermined timing from the excitation light source and the red light source device so that light of a predetermined wavelength band required at the time of image generation is emitted from the light source device 60 Perform individual control such as

  Furthermore, the control unit 38 causes the cooling fan drive control circuit 43 to perform temperature detection by a plurality of temperature sensors provided in the light source device 60 and the like, and controls the rotation speed of the cooling fan based on the result of the temperature detection. In addition, the control unit 38 causes the cooling fan drive control circuit 43 to continue the rotation of the cooling fan even after the power of the projection apparatus 10 is turned off by a timer or the like, or depending on the result of temperature detection by the temperature sensor. Control such as turning off the power supply of

  FIG. 3 is a schematic plan view showing the internal structure of the projection apparatus 10. As shown in FIG. The projection apparatus 10 includes a control circuit board 241 in the vicinity of the right side panel 14. The control circuit board 241 includes a power supply circuit block, a light source control block, and the like. In addition, the projection device 10 includes the light source device 60 on the side of the control circuit board 241, that is, on the substantially central portion of the casing of the projection device 10. Furthermore, in the projection device 10, the light source side optical system 170 is disposed between the light source device 60 and the back panel 13, and the projection side optical system 220 is disposed between the light source device 60 and the left panel 15. There is.

  The light source device 60 is a blue light source device which is blue wavelength band light (excitation light), and is a green light source which is an excitation light irradiation device 70 which is also an excitation light source and a light source of green wavelength band light (fluorescent light). A device 80 and a red light source device 120 serving as a light source of red wavelength band light (third wavelength band light) are provided. The green light source device 80 is configured of an excitation light irradiation device 70 and a fluorescent plate device 100. In the light source device 60, a light guiding optical system 140 for guiding and emitting light of each color wavelength band is disposed. The light guide optical system 140 guides each color wavelength band light emitted from each color light source device 70, 80, 120 to the light source side optical system 170.

  The excitation light irradiation device 70 is disposed on the front panel 12 side at a substantially central position in the left-right direction of the casing of the projection device 10. The excitation light irradiation device 70 is provided with three blue laser diodes 71 (excitation light sources), which are semiconductor light emitting elements arranged to emit light in the direction of the back panel 13. On the optical axis of the blue laser diode 71, there is provided a collimator lens 73 for converting into parallel light so as to enhance the directivity of each emitted light from each blue laser diode 71, and each blue emitted through this collimator lens 73. A reflection mirror 75 is provided which converts the optical axis of the light emitted from the laser diode 71 by 90 degrees and reflects it in the direction of the left panel 15. A diffusion plate 77 for diffusing the blue wavelength band light is provided on the outgoing light side of the reflection mirror 75.

  On the exit side of the diffusion plate 77, a first divided dichroic mirror 78 formed in a substantially rectangular flat plate shape is provided. The first divided dichroic mirror 78 is disposed at an angle of 45 degrees with respect to each optical axis of the condensing lens group 125 of the red light source device 120 and the condensing lens group 109 of the fluorescent plate device 100. As also shown in FIG. 4A, the first split dichroic mirror 78 is formed of two regions (a first region 78a and a second region 78b) having different spectral characteristics. The first region 78a transmits the blue wavelength band light and the red wavelength band light and reflects the green wavelength band light. The second region 78b transmits the red wavelength band light and reflects the blue wavelength band light and the green wavelength band light. The first region 78a is formed to have a smaller area than the second region 78b.

  A heat sink 81 is disposed on the back side of the plurality of blue laser diodes 71. On the other hand, a cooling fan 261 is disposed in the vicinity of the back panel 13. The blue laser diode 71 is cooled by the heat sink 81 and the cooling fan 261.

  The fluorescent plate device 100 includes a fluorescent plate 101 which is a fluorescent wheel disposed parallel to the left side panel 15, and a wheel motor 110 which rotationally drives the fluorescent plate 101. A heat sink 262 is disposed in the vicinity of the wheel motor 110, and a cooling fan 263 is disposed between the wheel motor 110 and the front panel 12. The fluorescent plate device 100 is cooled by the heat sink 262 and the cooling fan 263.

  The fluorescent plate 101 is formed in a disk shape as shown in FIG. 5 (a). The base 102 of the fluorescent plate 101 is a metal base made of copper, aluminum or the like. The substrate 102 is fixed to the motor shaft 114 of the wheel motor 110. The flat surface on the front side of the substrate 102 is mirror-processed by silver deposition or the like. The fluorescent light emitting area 103 (fluorescent light emitting area) is an area that emits fluorescent light, and a layer of annular green fluorescent material is laid on the mirror-processed surface. Further, the diffuse reflection area 104 is composed of a reflective member such as metal formed on the surface of the base material 102 or in the cutout through hole portion, and a diffuse transmission portion formed on the reflective member. Alternatively, the diffusive reflection area 104 is formed by forming a diffusive reflection member, such as glass, on the surface of which a fine asperity is formed by sand blasting or the like to apply a reflection coating. Specifically, a reflective film (for example, a metal film such as aluminum or silver) may be deposited on a glass diffusion surface having a predetermined diffusion angle to form a glossy diffuse reflection surface. In this manner, the fluorescent light emitting area 103 and the diffuse reflection area 104 are arranged in parallel in the circumferential direction.

  Note that the diffuse reflection area 104 may not be configured to include the reflective member and the diffuse transmission part. Although not shown, for example, when molding or pressing a metal made of copper, aluminum or the like, the surface of a mold (mold / press) is made uneven, and the unevenness is transferred to a metal substrate to be embossed. The diffusion / transmission part may be formed on the convex part of the formed metal base. The emboss processing which makes unevenness on the surface of metal may adopt the method of emboss processing by chemical corrosion (chemical etching) which dissolves metal by medicine. As described above, the convex portion having a predetermined height is formed on the metal substrate, and the diffused and transmitted portion is formed on the convex portion, so that the diffused and transmitted portion is not formed on the reflecting member having a predetermined thickness. The distance between 102 and the diffuse transmission part can be made larger than the distance between the substrate 102 and the fluorescent light emitting region 103.

  As shown in FIG. 5B, the fluorescent plate 101 indicates that the height H of the diffuse reflection area 104 from the base 102 is higher than the height h of the fluorescent light emission area 103 from the base 102. . For example, when the thickness of the fluorescent light emitting region 103 is about 0.1 mm, the thickness of the diffuse reflection region 104 can be about 0.3 to 0.4 mm.

  When the phosphor layer in the fluorescence emission region 103 is irradiated with blue wavelength band light as excitation light from the excitation light irradiation device 70, the green phosphor is excited, and from this green phosphor, green wavelength band light is emitted in all directions. Be done. The luminous flux emitted in all directions is reflected directly or by the mirror-processed surface of the base material 102 of the fluorescent plate 101 and is emitted to the front side of the fluorescent plate 101 (in other words, the right panel 14 side) The light is incident on a condensing lens group 109 formed by combining a plurality of lenses. Similarly, the blue wavelength band light from the excitation light irradiator 70 that has entered the diffuse reflection area 104 of the fluorescent plate 101 is diffused and reflected on the front side of the fluorescent plate 101 and is incident on the condenser lens group 109. The condensing lens group 109 condenses the luminous flux of the excitation light emitted from the excitation light irradiation device 70 on the fluorescent plate 101 and condenses the luminous flux emitted from the fluorescent plate 101 in the direction of the right panel 14. Thus, the green wavelength band light and the blue wavelength band light emitted from the fluorescent plate 101 enter the first split dichroic mirror 78 through the condenser lens group 109.

  The red light source device 120 is disposed so that the light emitted from the red light source device 120 intersects the blue wavelength band light reflected by the reflection mirror 75 of the excitation light irradiation device 70. In addition, at a position where red wavelength band light which is emitted light from the red light source device 120 intersects with blue wavelength band light which is incident and diffusely reflected to the fluorescent plate 101 and green wavelength band light which is emitted from the fluorescent plate 101. One split dichroic mirror 78 is provided.

  The red light source device 120 is provided with a red light source 121 (third light source) arranged to emit light in the direction of the back panel 13 and a condenser lens group 125 for condensing the light emitted from the red light source 121. . The red light source 121 is a red light emitting diode that is a semiconductor light emitting element that emits light in a red wavelength band. Furthermore, the red light source device 120 is cooled by the heat sink 130 disposed on the right side panel 14 side of the red light source 121.

  A light guiding optical system 140 is provided on the rear panel 13 side of the first split dichroic mirror 78. The blue wavelength band light, the green wavelength band light and the red wavelength band light emitted from the color light source devices 70, 80 and 120 are incident on the condensing lens 146 of the light guiding optical system 140 via the first split dichroic mirror 78. Do.

  The light guiding optical system 140 that guides light so that the optical axes of red, green, and blue wavelength band light are the same optical axis includes a condensing lens 146 and a second divided dichroic mirror 148. The condenser lens 146 is disposed on the back panel 13 side of the first split dichroic mirror 78. A second split dichroic mirror 148 formed in a substantially rectangular flat plate shape is disposed on the rear panel 13 side of the focusing lens 146. The second split dichroic mirror 148 is disposed to be orthogonal to the optical axis L2 of the focusing lens 146 (see FIG. 6 or 7). The second split dichroic mirror 148, as also shown in FIG. 4B, includes two regions (third region 148a and fourth region 148b) having different spectral characteristics. The third region 148a transmits the red wavelength band light and the green wavelength band light and reflects the blue wavelength band light. The fourth region 148 b transmits light. That is, the fourth region 148 b transmits any of red, green, and blue wavelength band light. The third region 148a is formed in a wider area than the fourth region 148b.

  Although the second split dichroic mirror 148 is disposed to be orthogonal to the optical axis of the condenser lens 146, the present invention is not limited thereto, and may be disposed to form an angle of 45 degrees. In this case, although the efficiency for removing the residual excitation light EL1 included in the green wavelength band light described later is lowered, the light is incident toward the second divided dichroic mirror 148 from the direction orthogonal to the optical axis of the condensing lens 146 Layout can be adopted.

  The light source side optical system 170 includes a condenser lens 174, a light tunnel 175, a condenser lens 178, an optical axis conversion mirror 181, a condenser lens 183, an irradiation mirror 185, and a condenser lens 195. The condenser lens 195 emits the image light emitted from the display element 51 disposed on the rear panel 13 side of the condenser lens 195 toward the fixed lens group 225 and the movable lens group 235. It is also part of

  Each color wavelength band light condensed by the condensing lens 146 is incident on the light tunnel 175 from the condensing lens 174 via the second split dichroic mirror 148. The light flux incident on the light tunnel 175 is converted by the light tunnel 175 into a light flux having a uniform intensity distribution. In addition, it can replace with the light tunnel 175 and can also be set as a microlens array.

  An optical axis conversion mirror 181 is disposed on the optical axis on the rear panel 13 side of the light tunnel 175 via a condenser lens 178. The light flux emitted from the light exit of the light tunnel 175 is condensed by the condensing lens 178, and then the optical axis is converted to the left panel 15 side by the optical axis conversion mirror 181.

  The light beam reflected by the optical axis conversion mirror 181 is condensed by the condenser lens 183, and then irradiated to the display element 51 at a predetermined angle through the condenser lens 195 by the irradiation mirror 185. A heat sink 53 is provided on the side of the back panel 13 of the display element 51 which is a DMD, and the display element 51 is cooled by the heat sink 53.

  A light beam which is light source light irradiated to the image forming surface of the display element 51 by the light source side optical system 170 is reflected by the image forming surface of the display element 51 and projected as projection light onto the screen via the projection side optical system 220 Be done. Here, the projection-side optical system 220 includes a condenser lens 195, a movable lens group 235, and a fixed lens group 225. The fixed lens group 225 is incorporated in a fixed barrel. The movable lens group 235 is incorporated in a movable lens barrel and is movable by a lens motor to enable zoom adjustment and focus adjustment.

  By thus configuring the projection device 10, when the fluorescent plate 101 is rotated and light is emitted from the excitation light irradiation device 70 and the red light source device 120 at different timings, the red, green and blue wavelength bands of light are guided Since the light is sequentially incident on the condenser lens 174 and the light tunnel 175 via the optical system 140 and is further incident on the display element 51 via the light source side optical system 170, the DMD which is the display element 51 of the projection apparatus 10 is data By displaying the light of each color according to time division, it is possible to project a color image on the screen.

  Here, how the color wavelength band lights emitted from the color light source devices 70, 80, and 120 are guided to the condensing lens 174 of the light guiding optical system 140 will be described in detail. The red wavelength band light emitted from the red light source device 120 is transmitted through the first area 78 a and the second area 78 b of the first split dichroic mirror 78 through the condenser lens group 125, and the condenser lens 146. Collected by The red wavelength band light emitted from the condenser lens 146 passes through the third area 148 a and the fourth area 148 b of the second split dichroic mirror 148, and is condensed by the condenser lens 174.

  Further, as shown in FIG. 6 and FIG. 7, the optical axis of the blue wavelength band light emitted from the reflection mirror 75 of the excitation light irradiation device 70 is predetermined relative to the optical axis of the condensing lens group 109 of the fluorescent plate device 100. It is emitted with an angle of Accordingly, the blue wavelength band light emitted from the reflection mirror 75 of the excitation light irradiation device 70 is incident on the first area 78a corresponding to the first area 78a of the first split dichroic mirror 78, and this blue wavelength The band light passes through the first region 78a. The blue wavelength band light emitted from the first region 78 a of the first divided dichroic mirror 78 is incident obliquely to the optical axis of the condenser lens group 109 of the fluorescent plate device 100 at a predetermined angle.

  When emitting light in the green wavelength band by the green light source device 80, as shown in FIGS. 6 and 8A and 8B, it corresponds to the condensing lens 109a closest to the fluorescent plate 101 in the condensing lens group 109. The fluorescent light emission area 103 of the fluorescent plate 101 is located at the position where As shown to Fig.8 (a), excitation light EL which is a blue wavelength zone | band light radiate | emitted from the condensing lens 109a is condensed by the irradiation spot S on the fluorescence emission area | region 103. As shown in FIG. At this time, the irradiation spot S on the fluorescent light emission area 103 is formed to be shifted in the outer diameter direction of the fluorescent plate 101 from the optical axis L1 of the condensing lens 109a (condensing lens group 109). In addition, even when the condensing lens 109 a (the condensing lens group 109) is not provided, when the excitation light EL is irradiated to the irradiation spot S on the fluorescence emission region 103, the incident direction of the excitation light EL is A predetermined angle may be inclined with respect to the orthogonal direction. That is, the excitation light EL is obliquely incident on one surface of the base material 102. Therefore, the direction in which the excitation light EL is incident may be irradiated to the irradiation spot S on the fluorescent light emitting area 103 from the center side of the fluorescent plate 101 as the fluorescent wheel, or the outer peripheral side of the fluorescent plate 101 as the fluorescent wheel Alternatively, the irradiation spot S on the fluorescent light emitting area 103 may be irradiated. That is, the excitation light EL may be incident from the radial direction of the fluorescent plate 101, which is a fluorescent wheel.

  Then, as shown in FIG. 8B, the fluorescent light FL in the green wavelength band emits light with the irradiation spot S as a light emitting point. The fluorescent light in the green wavelength band is diffused light, but the optical axis thereof is shifted in the outer diameter direction of the fluorescent plate 101 from the optical axis L1 of the condensing lens 109a (condensing lens group 109).

  As shown in FIG. 6, the fluorescent light FL in the green wavelength band emitted from the green light source device 80 is reflected by the first area 78 a and the second area 78 b of the first split dichroic mirror 78 and collected. It enters the lens 146. Also in this case, the optical axis of the green wavelength band light reflected by the first split dichroic mirror 78 is offset from the optical axis L2 of the condensing lens 146. Therefore, the green wavelength band light reflected by the first split dichroic mirror 78 and emitted from the focusing lens 146 is transmitted to the third region 148 a corresponding to the third region 148 a of the second split dichroic mirror 148. It is incident.

  Here, the green wavelength band light (fluorescent light FL) emitted in the fluorescent light emitting area 103 of the fluorescent plate 101 is emitted by irradiating the fluorescent substance in the fluorescent light emitting area 103 with the excitation light EL at the irradiation spot S as described above. . At this time, a part of light of the excitation light EL may reach the base material 102 of the fluorescent plate 101 as it is without irradiating the fluorescent substance in the fluorescent light emitting region 103 in which the granular fluorescent substance is solidified. Even in this case, the excitation light EL reflected by the mirror surface of the substrate 102 may be irradiated to the phosphor, but a part of the excitation light EL reflected by the mirror surface of the substrate 102 may be phosphor. In some cases, the light may be emitted from the condenser lens group 109 as it is without irradiation.

  Thus, even the green wavelength band light mixed with the residual excitation light EL1 of the blue wavelength band light is incident on the third area 148a corresponding to the third area 148a of the second split dichroic mirror 148 As a result, the green wavelength band light is transmitted, and the residual excitation light EL1 of the blue wavelength band light is reflected to be discarded light, so that it is possible to obtain the green wavelength band light with high color purity.

  On the other hand, when the blue wavelength band light is reflected by the diffuse reflection area 104 of the fluorescent plate 101, the diffuse reflection area 104 is disposed at a position corresponding to the condensing lens 109a, as shown in FIG. 8C. Then, the blue wavelength band light emitted from the condensing lens 109 a is irradiated at the position of the irradiation spot T on the diffuse reflection area 104. The irradiation spot T on the diffuse reflection area 104 is a reflection point of the reflected light DL. Here, the height from the base material 102 is higher (H> h) than the irradiation spot S of the fluorescent light emission area 103, and the blue wavelength band light (excitation light EL) is oblique to the optical axis L1 of the condensing lens 109a. Therefore, the reflection point to be the irradiation spot T is disposed on the optical axis L1 of the condensing lens 109a and at a position closer to the condensing lens 109a than the light emission point of the fluorescent light which is the irradiation spot S. Will be placed. That is, the distance from the light emitting point of the fluorescent light emitting area 103 to the focusing lens 109 a and the distance from the reflecting point of the diffuse reflection area (reflection area) 104 to the focusing lens 109 a are different. As described above, when the excitation light EL is incident from the radial direction of the fluorescent plate 101 as the fluorescent wheel, the position where the excitation light EL is irradiated to the diffuse reflection area 104 and the excitation light EL is irradiated to the fluorescence emission area 103 Are different in radial direction.

  Thus, as shown in FIG. 7, the blue wavelength band light reflected by the diffuse reflection area 104 and emitted from the condenser lens group 109 corresponds to the second area 78b of the first split dichroic mirror 78. To the second area 78b. Therefore, the blue wavelength band light is reflected by the second region 78 b and is incident on the condenser lens 146. The optical axis of the blue wavelength band light entering the condensing lens 146 is inclined at a predetermined angle with respect to the optical axis L 2 of the condensing lens 146. Therefore, the blue wavelength band light emitted from the condenser lens 146 is incident on the fourth area 148 b in correspondence to the fourth area 148 b of the second split dichroic mirror 148. Then, the blue wavelength band light passes through the fourth region 148 b of the second divided dichroic mirror 148 and is incident on the condensing lens 174 of the light source side optical system 170.

  Since the refractive index of the blue wavelength band light is higher than that of the green wavelength band light, the reflection point of the irradiation spot T emitted from the condensing lens group 109 is higher than the light emission point of the irradiation spot S emitting fluorescence light. Although it is close to the condenser lens 109a, the light emission point of the irradiation spot S that emits fluorescent light can be formed to be close to the condenser lens 109a.

Second Embodiment
Next, a light source device 60 a according to Embodiment 2 of the present invention will be described based on FIGS. 9 to 11. The light source device 60a illustrated in FIG. 9 is a MEMS (Micro Electro Mechanical Systems) as an optical path changing unit that changes the optical path of blue wavelength band light emitted from the reflection mirror 75 of the excitation light irradiation device 70 in the light source device 60a of the first embodiment. ) The mirror 300 is disposed on the light path. In addition, the light source device 60a in the present embodiment is provided with a fluorescent plate device 100a that forms a fixed fluorescent light source, instead of the fluorescent plate device 100 in the first embodiment. In the following description, the same members and places as in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  The excitation light irradiation device 70 in the present embodiment is disposed so that the blue wavelength band light reflected by the reflection mirror 75 is parallel to the red wavelength band light emitted from the red light source device 120. Then, the MEMS mirror 300 is disposed so as to reflect the blue wavelength band light reflected by the reflection mirror 75 of the excitation light irradiation device 70 and to intersect the optical axis of the red wavelength band light emitted from the red light source device 120 Be done. Therefore, the blue wavelength band light emitted from the excitation light irradiation device 70 is reflected toward the fluorescent plate device 100a.

  The MEMS mirror 300 comprises a reflection mirror and a coil. In the MEMS mirror 300, Lorentz force is generated by the current flowing through the coil, and the angle at which the mirror is disposed is changed. That is, the MEMS mirror 300 changes the angle of the reflection mirror of the MEMS mirror 300, and the irradiation position of the blue wavelength band light (excitation light EL) reflected by the reflection mirror is the fluorescence emission area 103a and the diffuse reflection area 104a. Switch.

  The fluorescent plate device 100 a includes a fluorescent plate 101 a which is a fluorescent plate disposed parallel to the left panel 15. The fluorescent plate 101a is formed in a substantially rectangular shape as shown in FIG. The fluorescent plate 101a includes a base 102a as a light source fixing member, and further includes a fluorescent emission area 103a emitting fluorescent light and a diffuse reflection area 104a reflecting blue wavelength band light on the base 102a. . 10A shows the fluorescent plate 101a as viewed from the MEMS mirror 300 side as a front view, and FIG. 10B shows a side view of the fluorescent plate 101a.

  In the fluorescent plate 101a, as shown in FIG. 10B, the diffuse reflection area 104a is formed thicker than the fluorescent light emission area 103a. For example, the diffuse reflection area 104a on the substrate 102a is formed to have a thickness of about T = 0.3 mm on the substrate 102a. Similar to the first embodiment, the diffuse reflection area 104 is made of a reflective member such as metal and a diffuse transmission part formed on the reflective member, or a fine asperity is formed on the surface and a reflection coating is applied. , And a diffuse reflection member such as glass. On the other hand, the fluorescence emission region 103a on the base 102a is formed on the base 102a to have a thickness of about t = 0.1 mm. As a result, in the fluorescent plate 101a, the diffuse reflection area 104a protrudes by about 0.2 mm from the fluorescent light emission area 103a on the base material 102a. Further, the fluorescent light emitting area 103a and the diffuse reflection area 104a are arranged in parallel in a substantially square shape in the longitudinal direction with the center on the base material 102a as a boundary.

  In the case of emitting the green wavelength band light by the green light source device 80, as shown in FIG. 9 and FIG. 11A, the blue wavelength band light (excitation light EL) reflected by the MEMS mirror 300 is a condensing lens. The fluorescent light emission area 103a on the left side of the center (optical axis L1) of the group 109 is irradiated. At this time, as shown in FIG. 11A, the excitation light EL2, which is blue wavelength band light passing through the focusing lens 109a, is focused at the irradiation spot U on the fluorescent light emitting area 103a.

  On the other hand, when the blue wavelength band light is reflected from the fluorescent plate device 100a, as shown in FIG. 11B, the blue wavelength band light EL3 (excitation light EL) reflected by the MEMS mirror 300 is a condensing lens. The diffuse reflection area 104a is irradiated on the right side of the center (optical axis L1) of the center 109a (optical axis L1 and opposite to the fluorescent light emission area 103a). Then, the blue wavelength band light (excitation light EL) emitted from the condensing lens 109a is irradiated at the position of the irradiation spot V on the diffuse reflection area 104a. The irradiation spot V on the diffuse reflection area 104a is a reflection point of the reflected light DL1. Here, the height from the base material 102a is higher than the position of the irradiation spot U of the fluorescence emission area 103a at the position of the irradiation spot V on the diffuse reflection area 104a (T> t). That is, since the diffuse reflection area 104a protrudes more than the fluorescent light emission area 103a, it has a step corresponding to that. Due to this step, the MEMS mirror 300 has a smaller angular width at the time of irradiation of the fluorescent light emitting area 103a and the diffuse reflection area 104a.

  Here, the angle of the reflection mirror when the reflected light from the MEMS mirror 300 is irradiated to the diffuse reflection area 104 a is taken as a reference angle. Further, an angle between incident light to the MEMS mirror 300 and the reflected light is taken as an optical deflection angle. Then, for example, when the MEMS mirror 300 inclines the reflection mirror by 4 ° with respect to the reference angle, the optical swing angle of the blue wavelength band light can be deviated by 8 °.

  As described above, in the light source device 60 a of the second embodiment, the MEMS mirror 300 reflects the blue wavelength band light emitted from the excitation light irradiation device 70 and irradiates the light in the fluorescence emission area 103 a and the diffuse reflection area 104 a. It can be switched by.

(Embodiment 3)
Next, a light source device 60b according to Embodiment 3 of the present invention will be described based on FIG. In the light source device 60b shown in FIG. 12, a reflection wheel 400 as an optical path changing unit for changing the optical path of the light emitted from the excitation light irradiation device 70 is disposed in place of the MEMS mirror 300 of the second embodiment. The reflective wheel 400 also includes a motor 440. In addition, the same code | symbol is attached | subjected to the member and location same as Embodiment 1 or 2, and the description is simplified or abbreviate | omitted.

  As shown in FIGS. 12 (a) to 12 (c), the reflecting wheel 400 is formed on a disk-shaped substrate 410, and a first reflecting plate 420 having an arc shape in a front view and having a predetermined first angle; And a second reflecting plate 430 having an arc shape in a front view and having a second angle. In other words, since the reflection wheel 400 is disposed to be inclined with respect to the optical axis of the light emitted from the excitation light irradiation device 70, the first reflection plate that reflects the excitation light at the reference angle (first angle) 420 and a second reflection plate 430 that reflects excitation light at an angle (second angle) inclined by a predetermined angle with respect to the reference angle. The first reflection plate 420 having the first angle reflects the blue wavelength band light (excitation light EL) emitted from the reflection mirror 75 of the excitation light irradiation device 70 (see FIG. 11), and collects the light from the fluorescent plate device 100a. The light enters the lens group 109 at a reference angle. The blue wavelength band light (excitation light EL) reflected by the first reflection plate 420 irradiates the diffuse reflection area 104 a.

  On the other hand, the second reflection plate 430 having the second angle is formed with the reflection surface inclined, and reflects the excitation light EL emitted from the excitation light irradiation device 70 at a predetermined angle with respect to the reference angle. (Figure 12). Then, the excitation light EL reflected by the second reflection plate 430 irradiates the fluorescent light emission area 103 a.

  In the reflection wheel 400 of the present embodiment, the substrate 410 is rotated by the motor 440, the excitation light EL is reflected by the first reflection plate 420 and the second reflection plate 430, and the irradiation position of the excitation light EL is switched.

(Embodiment 4)
Next, a light source device 60c according to Embodiment 4 of the present invention will be described based on FIG. A light source device 60c shown in FIG. 13 is a device in which a fluorescent plate device 100b including a wheel motor 110a is disposed in place of the fluorescent plate device 100a in the light source device 60 shown in the second embodiment. In the following description, the same members and places as in the second embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  As shown in FIGS. 13A to 13C, the fluorescent plate device 100b includes a fluorescent plate 101b which is a fluorescent wheel in the light source device 60c. The fluorescent plate 101b includes a base 102b, and a fluorescent light emission area 103b and a diffuse reflection area 104b formed on one surface of the base 102b.

  The fluorescent plate device 100b includes a wheel motor 110a and rotates a fluorescent plate 101b, which is a fluorescent wheel. Thereby, in the present embodiment, it is possible to prevent heat from being concentrated on the fluorescent plate 101b. In addition, since the diffuse reflection area 104b is also rotated with the rotation of the fluorescent plate 101b, speckle noise can also be reduced.

  According to the embodiment of the present invention described above, the light source device 60 (60a to 60c) includes the excitation light irradiation device 70 including the blue laser diode 71 (excitation light source) for emitting the blue wavelength band light (excitation light); A condensing lens 109a (condenser lens group 109) disposed on the optical path of light emitted from the blue laser diode 71, a fluorescent light emitting area 103 (fluorescent light emitting area) that emits fluorescent light, and reflection that reflects excitation light And a diffuse reflection area 104 which is a member. Furthermore, a fluorescence emission area 103 formed on one surface of the base material 102 and the base material 102 and emitting fluorescence light FL in a wavelength band different from that of the excitation light EL, and a fluorescence emission area 103 of one surface of the base material 102 And the diffuse reflection area (reflection area) 104 for reflecting the excitation light EL arranged in parallel with each other, and the height from the base material 102 to the surface of the fluorescence emission area 103 and the diffusion from the base material 102 in the fluorescent plate 101. The height to the surface of the reflective area (reflective area) 104 is different.

  As a result, the optical axes of the blue wavelength band light and the green wavelength band light emitted from the condensing lens group 109 can be shifted, so that it corresponds to the blue wavelength band light and the green wavelength band light on the subsequent optical path. A filter member having a color filter function (the second split dichroic mirror in the above embodiment 1) can be disposed. Therefore, compared with the case where the blue wavelength band light and the green wavelength band light are guided to the same optical axis, it is possible to dispose the compact filter member excluding the filter device provided with the driving mechanism such as the wheel motor. Therefore, it is possible to provide a compact light source device.

  In addition, excitation light is obliquely incident on one surface of the base material 102. Thereby, the position of the irradiation spot S can be shifted with the optical axis L1.

  Further, the reflection point of the diffuse reflection area 104 is disposed at a position closer to the condensing lens group 109 (condenser lens 109 a) than the fluorescence emission area 103. Accordingly, light in the blue wavelength band having a high refractive index can be efficiently condensed by the condensing lens 109a.

  Further, one of the light emission point of the fluorescent light emission area 103 and the reflection point of the diffuse reflection area 104 is disposed off the optical axis of the condensing lens group 109. Thereby, any one of the light emission point of the fluorescent light emission area 103 and the reflection point of the diffuse reflection area 104 can be disposed on the optical axis of the condensing lens group 109, so that the layout design of the optical member thereafter can be facilitated. can do.

  Further, the light source device 60 includes the fluorescent plate 101 including the fluorescent light emitting area 103 and the diffuse reflection area 104. The height H of the diffuse reflection area 104 from the base 102 is higher than the height h of the fluorescent light emission area 103 from the base 102. As described above, by bringing the reflection point of the diffuse reflection area 104 closer to the condensing lens 109a, light in the blue wavelength band having a high refractive index can be efficiently condensed.

  Further, one of the light emitting point of the fluorescent light emitting area 103 and the reflection point of the reflective area 104 is disposed on the optical axis of the condensing lens group 109. As a result, it is possible to emit reflected light whose optical axis is symmetrical with respect to the blue wavelength band light incident on the condensing lens group 109, so that the layout design of the subsequent optical members can be facilitated.

  Further, the diffuse reflection area 104 includes a metal reflection member formed on the surface of the base material 102 or in the cutout light transmission part, and a diffusion transmission part formed on the reflection member. Thus, light incident on the diffuse reflection area 104 can be reflected as diffused light.

  In addition, the first split dichroic mirror 78 is provided on the light path between the blue laser diode 71 and the fluorescent light emission area 103. The first split dichroic mirror 78 includes a first region 78a that transmits blue wavelength band light and reflects green wavelength band light, and a second region 78b that reflects blue wavelength band light and green wavelength band light. Equipped with The blue wavelength band light emitted from the blue laser diode 71 is incident corresponding to the first area 78a, and the blue wavelength band light reflected by the diffuse reflection area 104 is incident corresponding to the second area 78b. Be done. Accordingly, it is possible to reflect the blue wavelength band light toward the light guiding optical system 140 while making the blue wavelength band light incident on the condensing lens group 109 via the first divided dichroic mirror 78.

  The second split dichroic mirror 148 is provided on the optical path of the blue wavelength band light and the green wavelength band light reflected by the first split dichroic mirror 78. The second split dichroic mirror 148 includes a third region that reflects blue wavelength band light and transmits green wavelength band light, and a fourth region that transmits light. Then, the blue wavelength band light reflected by the first split dichroic mirror 78 is incident corresponding to the fourth region 148 b, and the green wavelength band light reflected by the first split dichroic mirror 78 is third Is incident corresponding to the area 148a of the As a result, it is possible to obtain the light source device 60 in which the green color purity is enhanced by adopting the small second split dichroic mirror 148.

  The light source device 60 further includes a red light source 121 (third light source) that emits red wavelength band light (third wavelength band light), and the red light source 121 emits light from the blue laser diode 71. And the light emitted from the fluorescent light emitting area 103 to be incident on the first divided dichroic mirror 78. Thereby, the light source device 60 provided with a three-color light source can be provided while being formed in a small size.

  The first region 78a and the second region 78b of the first split dichroic mirror 78 and the third region 148a of the second split dichroic mirror 148 transmit the red wavelength band light. Thereby, the red wavelength band light can be easily added to the configuration for removing the residual excitation light of the green wavelength band light.

  The light source device 60a can also include an optical path changing unit that reflects the excitation light EL2 emitted from the excitation light irradiation device 70 and emits the light toward the fluorescent plate 101a. Thereby, the optical path changing unit can switch the irradiation position of the excitation light to be reflected between the fluorescent light emission area 103a and the diffuse reflection area 104a.

  In addition, the light source device 60a includes a MEMS mirror 300 as an optical path changing unit. The MEMS mirror 300 switches the position to be irradiated with the excitation light EL2 between the fluorescence emission area 103a and the diffuse reflection area 104a. The MEMS mirror 300 includes a mirror that changes the irradiation angle with respect to the fluorescent plate 101a. Therefore, it is possible to change the irradiation angle and switch the position to which the irradiation light is irradiated.

  Therefore, by adjusting the reflection angle of the MEMS mirror 300 to realize the fluorescent plate device 100 a forming the fixed fluorescent light source, the size can be reduced compared to the light source device 60 of the first embodiment. Further, by switching the irradiation angle of the MEMS mirror 300 in synchronization with the operation of the display element 51 which is a DMD, it is possible to suppress the chromatic aberration. As a result, a clearer, more accurate image can be obtained, and the light collection efficiency can also be enhanced.

  The light source device 60b further includes a reflection wheel 400 as an optical path changing unit that reflects the excitation light EL2 emitted from the excitation light irradiation device 70 and emits the light toward the fluorescent plate 101a. The reflection wheel 400 has a substrate having a first reflection plate 420 having a predetermined first angle for irradiating the diffuse reflection area 104a, and a second reflection plate 430 having a predetermined second angle for irradiating the fluorescence emission area 103a. It has 410. The reflection wheel 400 rotates the substrate 410 by the motor 440, reflects the excitation light EL by the first reflection plate 420 and the second reflection plate 430, and switches the irradiation position of the excitation light EL.

  As a result, the reflection wheel 400 can easily switch between the fluorescent light emission area 103 a and the diffuse reflection area 104 a to be irradiated, so that the size can be reduced compared to the light source device 60 of the first embodiment. In addition, since the blue wavelength band light emitted from the reflection mirror 75 of the excitation light irradiation device 70 can be dispersed as compared with the case of using the MEMS mirror 300 described in the second embodiment, the heat load can be reduced. it can.

  The base 102 a is formed of a light source fixing member. Thereby, since use of the wheel motor 110 of Embodiment 1 can be avoided, not only the miniaturization of the light source device 60a but also noise can be reduced.

  In addition, the fluorescent plate device 100b further includes a wheel motor 110a, and the wheel motor 110a rotates the fluorescent light emission area 103a and the diffuse reflection area 104a. Thus, heat concentration on the fluorescent plate 101b can be avoided. In addition, speckle noise can be reduced by the diffuse reflection area 104b rotating with the rotation of the fluorescent plate 101b.

  Further, in the projection device 10, a light source device 60 in which the light emission point of the fluorescent light emission area 103 and the reflection point of the diffuse reflection area 104 are different, and a display element 51 which is irradiated with light source light from the light source device 60 to form image light. And a projection-side optical system 220 for projecting the image light emitted from the display element 51 onto a screen, and a projection device control unit for controlling the display element 51 and the light source device 60. As a result, it is possible to provide a compact projection device that includes a filter member that enhances color purity and projects a clear image.

In the second to fourth embodiments, the diffuse reflection regions 104a and 104b of the fluorescent plates 101a and 101b are projected more than the fluorescent regions 103a and 103b, and have steps. However, the configuration is not limited to this. The position of the fluorescent wheel in the radial direction may be different from each other between the irradiation position of the excitation light in the fluorescence emission regions 103a and 103b and the irradiation position of the excitation light in the diffuse reflection regions 104a and 104b. That is, the distance from the center of the fluorescent wheel may be different between the irradiation position of the excitation light in the fluorescence emission regions 103a and 103b and the irradiation position of the excitation light in the diffuse reflection regions 104a and 104b.

  In the second to fourth embodiments, since the incident angle of the excitation light is changed using the MEMS mirror 300 or the reflection wheel 400, the steps are separated by the diffuse reflection areas 104a and 104b and the fluorescence emission areas 103a and 103b. Even if it is not included, the state in which the excitation light is incident on the diffuse reflection areas 104a and 104b and the state in which the excitation light is incident on the fluorescence emission areas 103a and 103b can be efficiently switched.

  Also, the embodiments described above are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in other various forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

In the following, the invention described in the first claim of the present application is appended.
[1] an excitation light source for emitting excitation light,
A substrate, a fluorescence emitting region formed on one surface of the substrate and emitting fluorescence light in a wavelength band different from that of the excitation light, and the fluorescence emitting region on one surface of the substrate A fluorescent wheel comprising: a reflective area configured to reflect the excitation light;
Have
A light source device characterized in that the position of the fluorescent wheel in the radial direction is different between the irradiation position of the excitation light in the fluorescence emission region and the irradiation position of the excitation light in the reflection region.
[2] The height from the one surface of the substrate to the surface of the fluorescence emission region is different from the height from the one surface of the substrate to the surface of the reflection region. The light source device according to [1].
[3] The light source device according to [1], wherein the excitation light is obliquely incident on the one surface of the base material.
[4] has a condensing lens disposed on the optical path of the excitation light,
Any one of the light emission point of the fluorescence emission area and the reflection point of the reflection area is disposed offset from the optical axis of the condenser lens according to the above [1] to [3]. Light source device.
[5] The distance from the light emitting point of the fluorescent light emitting area to the light collecting lens, and the distance from the reflecting point of the reflection area to the light collecting lens are different from each other. Light source device.
[6] Any one of the light emitting point of the fluorescence emitting area and the reflection point of the reflecting area is disposed on the optical axis of the condenser lens. [4] or [5] ] The light source device as described in [].
[7] The reflection area is characterized by including a reflection member containing a metal formed on the surface of the base material or in a cutout through hole, and a diffuse transmission part formed on the reflection member. The light source device according to any one of [1] to [6].
[8] A first region provided on an optical path between the excitation light source and the fluorescence emission region, transmitting the excitation light and reflecting the fluorescence light, and reflecting the excitation light and the fluorescence light A second split dichroic mirror comprising
The excitation light emitted from the excitation light source is incident on the first region corresponding to the first region, and the excitation light reflected by the reflective member corresponds to the second region. The light source device according to the above [7], which is incident on the second region.
[9] A third region which is provided on the optical path of the excitation light and the fluorescence light reflected by the first divided dichroic mirror, transmits a third region which reflects the excitation light and transmits the fluorescence light And a second split dichroic mirror comprising
The excitation light reflected by the first divided dichroic mirror is incident on the fourth region corresponding to the fourth region, and the fluorescent light reflected by the first divided dichroic mirror is The light source device according to [8], which is incident on the third area corresponding to the third area.
[10] A third light source emitting a third wavelength band light different from the excitation light and the fluorescence light,
The third light source intersects the excitation light emitted from the third light source with the excitation light emitted from the excitation light source and the fluorescence light emitted from the fluorescence emission area, and the first divided dichroic mirror The light source device according to [9], which is disposed to be incident on the light source.
[11] The first region and the second region of the first split dichroic mirror and the third region of the second split dichroic mirror transmit the third wavelength band light. The light source device according to [10], characterized in that
[12] The excitation light is blue wavelength band light,
The fluorescent light is green wavelength band light,
The light source device according to [10] or [11], wherein the third wavelength band light is red wavelength band light.
[13] An optical path changing unit that reflects excitation light emitted from the excitation light source and emits the light toward the fluorescent wheel
The light path changing unit is
The light source device according to any one of [1] to [5], wherein the irradiation position of the reflected excitation light is switched between the fluorescence emission area and the reflection area.
[14] The light path changing unit
A mirror for reflecting the excitation light toward the fluorescent wheel;
The mirror is
The light source device according to [13], wherein an irradiation position of the excitation light is switched by changing an angle at which the excitation light is reflected.
[15] The light path changing unit
The substrate includes a first reflecting plate having a predetermined first angle for irradiating the reflection area, and a second reflecting plate having a predetermined second angle for irradiating the fluorescence emitting area.
The light source device according to [13], wherein the irradiation position of the excitation light is switched by rotating the substrate.
[16] The substrate is
The light source device according to any one of [13] to [15], which is formed of a fixed light source member.
[17] further equipped with a wheel motor,
The light source device according to any one of [13] to [15], wherein the wheel motor rotates the fluorescent wheel.
[18] The light source device according to any one of the above [1] to [17],
A display element which is irradiated with light source light from the light source device to form image light;
A projection-side optical system for projecting the image light emitted from the display element onto a screen;
The display element, and a projection device control unit that controls the light source device;
A projection device characterized by having.

DESCRIPTION OF SYMBOLS 10 Projection apparatus 11 Top panel 12 Front panel 13 Rear panel 14 Right panel 15 Left panel 17 Exhaust hole 18 Intake hole 19 Lens cover 20 Terminal 21 I / O connector part 22 I / O 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 53 Heatsink 60, 60a, 60b Light source device 70 Excitation light irradiation device 71 Blue laser diode 73 Collimator lens 75 Reflection mirror 77 Diffusion plate 78 First split dichroic mirror 78a First area 78b Second area 80 Color light source device 81 Heat sink 100, 100a, 100b Fluorescent plate device 101, 101a, 101b Fluorescent plate 102, 102a, 102b Base material 103, 103a, 103b Fluorescent emission area 104, 104a, 104b Diffuse reflection area 109 Condenser group 109a Condenser 110, 110a Wheel motor 114 Motor shaft 120 Red light source device 121 Red light source 125 Condensing lens group 130 Heat sink 140 Light guiding optical system 146 Condensing lens 148 Second divided dichroic mirror 148a Third area 148b Fourth area 170 Light source Optical system 174 Condenser lens 175 Light tunnel 178 Condenser lens 181 Optical axis conversion mirror 183 Condenser lens 2
185 irradiation mirror 195 condenser lens 220 projection side optical system 225 fixed lens group 235 movable lens group 241 control circuit board 261 cooling fan 262 heat sink 263 cooling fan 300 MEMS mirror 400 reflection wheel 410 substrate 420 first reflection plate 430 second reflection plate 440 Wheel motor 440a Rotating axis L1, L2 Optical axis DL, DL1 Reflected light EL1 Residual excitation light EL, EL2 Excitation light EL3 Blue wavelength band light EL4 Excitation light FL Fluorescent light H, h Height S Irradiation spot T Irradiation spot U Irradiation spot V Irradiation spot

Claims (18)

An excitation light source for emitting excitation light;
A substrate, a fluorescence emitting region formed on one surface of the substrate and emitting fluorescence light in a wavelength band different from that of the excitation light, and the fluorescence emitting region on one surface of the substrate A fluorescent wheel comprising: a reflective area configured to reflect the excitation light;
Have
A light source device characterized in that the position of the fluorescent wheel in the radial direction is different between the irradiation position of the excitation light in the fluorescence emission region and the irradiation position of the excitation light in the reflection region.   The height from the one surface of the substrate to the surface of the fluorescent light emitting region is different from the height from the one surface of the substrate to the surface of the reflective region. The light source device as described.   The light source device according to claim 1, wherein the excitation light is obliquely incident on the one surface of the base material. And a condenser lens disposed on the light path of the excitation light,
The light emission point of the said fluorescence emission area | region and the reflective point of the said reflection area | region are shifted | deviated from the optical axis of the said condensing lens, and either one is arrange | positioned, It is characterized by the above-mentioned. Light source device.   The light source device according to claim 4, wherein a distance from the light emitting point of the fluorescent light emitting area to the condensing lens and a distance from the reflecting point of the reflective area to the condensing lens are different.   The light source according to claim 4 or 5, wherein any one of the light emitting point of the fluorescent light emitting area and the reflection point of the reflecting area is disposed on the optical axis of the condensing lens. apparatus.   The reflective region includes a reflective member including a metal formed on the surface of the base material or in a cut-out hole portion, and a diffuse transmission portion formed on the reflective member. The light source device according to any one of claims 1 to 6. A first region provided on an optical path between the excitation light source and the fluorescence emission region, which transmits the excitation light and reflects the fluorescence light, and reflects the excitation light and the fluorescence light. A first split dichroic mirror comprising
The excitation light emitted from the excitation light source is incident on the first region corresponding to the first region, and the excitation light reflected by the reflective member corresponds to the second region. The light source device according to claim 7, wherein the light source device is incident on the second region. A third region is provided on the optical path of the excitation light and the fluorescence light reflected by the first divided dichroic mirror, and a third region for reflecting the excitation light and transmitting the fluorescence light, and a fourth for transmitting the light A second split dichroic mirror comprising
The excitation light reflected by the first divided dichroic mirror is incident on the fourth region corresponding to the fourth region, and the fluorescent light reflected by the first divided dichroic mirror is The light source device according to claim 8, wherein the light is incident on the third area corresponding to the third area. A third light source for emitting a third wavelength band light different from the excitation light and the fluorescent light;
The third light source intersects the excitation light emitted from the third light source with the excitation light emitted from the excitation light source and the fluorescence light emitted from the fluorescence emission area, and the first divided dichroic mirror The light source device according to claim 9, wherein the light source device is disposed to be incident on the light source.   The first area and the second area of the first divided dichroic mirror and the third area of the second divided dichroic mirror transmit the third wavelength band light. The light source device according to claim 10. The excitation light is blue wavelength band light,
The fluorescent light is green wavelength band light,
12. The light source device according to claim 10, wherein the third wavelength band light is red wavelength band light. The apparatus further comprises an optical path changing unit that reflects excitation light emitted from the excitation light source and emits the light toward the fluorescent wheel.
The light path changing unit is
The light source device according to any one of claims 1 to 5, wherein an irradiation position of the reflected excitation light is switched between the fluorescence emission area and the reflection area. The light path changing unit is
A mirror for reflecting the excitation light toward the fluorescent wheel;
The mirror is
The light source device according to claim 13, wherein an irradiation position of the excitation light is switched by changing an angle at which the excitation light is reflected. The light path changing unit is
The substrate includes a first reflecting plate having a predetermined first angle for irradiating the reflection area, and a second reflecting plate having a predetermined second angle for irradiating the fluorescence emitting area.
The light source device according to claim 13, wherein the irradiation position of the excitation light is switched by rotating the substrate. The substrate is
The light source device according to any one of claims 13 to 15, wherein the light source device is formed of a fixed light source member. Further equipped with a wheel motor,
The light source device according to any one of claims 13 to 15, wherein the wheel motor rotates the fluorescent wheel. A light source device according to any one of claims 1 to 12.
A display element which is irradiated with light source light from the light source device to form image light;
A projection-side optical system for projecting the image light emitted from the display element onto a screen;
The display element, and a projection device control unit that controls the light source device;
A projection device characterized by having.

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