JP2012069387A - Light source device and projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device in which high-brightness illumination is possible by improving utilization efficiency of fluorescence emitted from phosphors without increasing a light emission amount per unit area of the phosphors, and a projection type display device using it.SOLUTION: A fluorescent light source part 6 includes phosphor layers 5a, 5b, 5c, 5d, 5e and an opening part 8a in which fluorescence emitted from the phosphor layers is emitted. An exciting light source 1 excites the phosphors of the phosphor layers. A light tunnel 2 is adjacent to the fluorescent light source part and houses the exciting light source 1. The light source device is constituted of the fluorescent light source part 6 and the light tunnel. Illumination light is emitted from the opening part.

Description

  The present invention relates to a light source device and a projection display device using the same.

In a projection display device such as a liquid crystal projector, a discharge lamp such as an ultrahigh pressure mercury lamp or a xenon lamp has been conventionally used as a light source. In recent years, it has been studied to use a light emitting diode, a semiconductor laser, or the like as a light source.
In Patent Document 1, a circular transparent substrate capable of rotation control has a plurality of sector-shaped segment regions, and at least two of the segment regions of the transparent substrate receive predetermined excitation light emitted from a semiconductor laser. There is described a light source device including an excitation light source in which layers of different phosphors that emit light in the wavelength band are arranged and that irradiates the phosphor with excitation light in a visible light region.

JP 2009-277516 A

  By the way, the light source device described in Patent Document 1 irradiates the phosphor layer with the excitation light while rotating the disk-shaped transparent substrate on which the phosphor layer is formed. The primary color light is emitted in order and is incident on an illumination optical system including a light guide device such as a light tunnel or a glass rod.

  In general, the amount of light that can be used as an illumination optical system is determined by Etendue, which is the product of the light emitting area of the light source and the solid angle of the light spread. In other words, even if the light emitting area is made larger than the etendue of the system, the amount of light that cannot be used increases, and the brightness of the system is not improved. Therefore, in the light source device described in Patent Document 1, it is necessary to reduce the area of the luminous flux of the excitation light and make the fluorescence excited by the excitation light as close as possible to the point light source.

  However, when a strong point light source is irradiated onto the phosphor, there is a problem that the color of the fluorescence changes or the life is deteriorated due to the temperature rise.

  The present invention has been made in view of such problems, and high-intensity illumination can be achieved by improving the utilization efficiency of fluorescence emitted from the phosphor without increasing the amount of emitted light per unit area of the phosphor. An object of the present invention is to provide a light source device and a projection display device using the same.

  In order to solve the above-described problems of the prior art, the present invention provides a fluorescent light source unit (6) including a phosphor layer (5a) and an opening (8a) from which fluorescence emitted from the phosphor layer is emitted, An excitation light source (1) that excites the phosphor of the phosphor layer (5a), and a light tunnel (2) that is adjacent to the fluorescence light source section (6) and houses the excitation light source (1). Provided is a light source device.

  In the above configuration, a dichroic filter (3) that transmits the emission light wavelength from the excitation light source (1) and reflects the emission light wavelength from the phosphor between the light tunnel (2) and the phosphor layer (5a). ) May be provided.

  It is preferable that the opening (8a) includes a dichroic filter (9) that reflects the emission light wavelength from the excitation light source and transmits the emission light wavelength from the phosphor.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the light source device which can perform high-intensity illumination by improving the utilization efficiency of the fluorescence inject | emitted from fluorescent substance, without increasing the emitted light amount per unit area of fluorescent substance. In addition, the projection display device can be configured using a light source device capable of high-intensity illumination by improving the utilization efficiency of fluorescence emitted from the phosphor without increasing the amount of emitted light per unit area of the phosphor. .

It is a perspective view which shows the light source device 201 of the 1st Embodiment of this invention. It is sectional drawing which looked at the light source device 201 of 1st Embodiment from the paper surface front side by making S1-S1 into a cut surface. It is sectional drawing which looked at the light source device 201 of 1st Embodiment from the paper surface right side by making S2-S2 into a cut surface. It is a perspective view which shows the light source device 202 of the 2nd Embodiment of this invention. It is sectional drawing which looked at the light source device 202 of 2nd Embodiment from the paper surface front side by making S1-S1 into a cut surface. It is sectional drawing which looked at the light source device 202 of 2nd Embodiment from the paper surface right side by making S2-S2 into a cut surface. It is a perspective view which shows the example of the light source device 202-2 which divided | segmented the surface emitting type light emitting diode into the surface emitting type light emitting diode of a smaller area in the light source device 202 of 2nd Embodiment. It is sectional drawing which looked at the light source device 202-2 shown in FIG. 7 from paper front side by making S1-S1 into a cut surface. It is sectional drawing which looked at the light source device 202-2 shown in FIG. 7 from the paper surface right side by making S2-S2 into a cut surface. It is a perspective view which shows the light source device 203 of the 3rd Embodiment of this invention. It is sectional drawing which looked at the light source device 203 of 3rd Embodiment from the paper surface front side by making S1-S1 into a cut surface. It is sectional drawing which looked at the light source device 203 of 3rd Embodiment from the paper surface right side by making S2-S2 into a cut surface. It is a perspective view which shows the light source device 204 of the 4th Embodiment of this invention. It is sectional drawing which looked at the light source device 204 of 4th Embodiment from the paper front side by making L1 into a cut surface. It is sectional drawing which looked at the light source device 204 of 4th Embodiment from the paper surface right side by making L2 into a cut surface. It is a rear view of the light source device 204 of 4th Embodiment. It is a figure which shows the projection type display apparatus using the light source device 203 which concerns on the 3rd Embodiment of this invention. It is a figure which shows another example of the projection type display apparatus using the light source device 203 which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of a light source device and a projection display device according to the present invention will be described with reference to the drawings.

<First Embodiment>.
FIG. 1 is a perspective view showing a light source device 201 according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the light source device 201 according to the first embodiment as viewed from the front side of the drawing with S1-S1 as a cut surface. FIG. 3 is a cross-sectional view of the light source device 201 according to the first embodiment as viewed from the right side of the drawing with S2 to S2 as a cut surface. The light source device 201 as a whole has a shape such that a rectangular parallelepiped has two stories. For convenience of explanation, the rectangular parallelepiped region on the lower side in FIG. 1 is referred to as a first floor portion, and the upper rectangular parallelepiped region is referred to as a second floor portion. However, for convenience of explanation, the first floor portion and the second floor portion are expressed, but the direction of operation is not limited.

  First, the first floor portion of the light source device 201 of the first embodiment will be described. The bottom surface of the rectangular parallelepiped on the first floor is composed of a light source mounting board 1a. Inside the light source mounting substrate 1a, a surface emitting type light emitting diode 1 is provided as an excitation light source of a phosphor. The four side surfaces are constituted by side members 2a, 2b, 2c and 2d. On the inner side of the side members 2a, 2b, 2c, and 2d, a highly reflective mirror surface (silver, aluminum enhanced reflection film or the like) is deposited. The light tunnel 2 that guides the light emitted from the surface-emitting type light emitting diode 1 upward is formed by the four side members 2a, 2b, 2c, and 2d. It is desirable that the exposed surface of the light source mounting substrate 1a on the light tunnel 2 side be subjected to a process for increasing the light reflectance.

  The portion corresponding to the boundary between the first floor portion and the second floor portion of the light source device 201 of the first embodiment corresponds to the exit of the light tunnel 2. A phosphor assembly in which the phosphor layer 5e is provided on the glass substrate 4 is disposed at a portion corresponding to the boundary. The phosphor layer 5e is coated (film-formed) with a predetermined thickness of a phosphor mixed with a binder by a method such as precipitation or printing. Moreover, you may provide a fluorescent substance layer by the method of adhere | attaching the molded product shape | molded by mixing fluorescent substance to a glass substrate. On the opposite side of the glass substrate from the phosphor layer 5e, there is formed a dichroic filter 3 that transmits the wavelength of light corresponding to the light emitted from the surface emitting type light emitting diode 1 and reflects the light corresponding to the wavelength of fluorescence. ing. It is also possible to form a dichroic filter on a glass substrate and form a phosphor layer thereon.

  Next, the second floor portion of the light source device 201 of the first embodiment will be described. A phosphor assembly in which a phosphor layer is formed on a metal substrate is provided on four side surfaces of the second floor portion. Specifically, mirror treatment is performed on one side of the metal substrates 6a, 6b, 6c, and 6d, and phosphor layers 5a, 5b, 5c, and 5d are provided thereon. The phosphor layers 5a, 5b, 5c, and 5d are coated (deposited) with a predetermined thickness of a phosphor mixed with a binder by a method such as precipitation or printing. Further, the phosphor layer may be provided by a method of adhering a molded product formed by mixing phosphors to a glass substrate.

  The top surface 8 is provided on the four side surfaces. As the top surface, for example, a metal plate having a mirror finish on the inner surface side is used. Further, the top surface 8 is provided with an opening 8a having a predetermined area necessary for an illumination system to be described later. Fluorescence is emitted from the opening 8a. A dichroic filter 9 that reflects the wavelength of light corresponding to light emitted from the surface-emitting type light emitting diode 1 and transmits light corresponding to the wavelength of fluorescence is disposed in the opening 8a. A rectangular parallelepiped fluorescent light source section 6 is formed by the five phosphor layers 5a, 5b, 5c, 5d, and 5e, the top surface 8, and the opening 8a. The inside of the fluorescent light source unit 6 is referred to as an optical space 7. In FIG. 1, all of the optical space of the fluorescent light source unit 6 other than the top surface is filled with the phosphor layer, but there may be a region where the phosphor layer does not partially exist.

  When the light source device 201 of the first embodiment is applied to a three-plate projection display device, three light source devices 201 that emit illumination light of three primary colors are necessary. Here, for convenience of explanation, the operation of the light source device will be described in the case where green light is emitted from the opening.

  In the case of using a phosphor layer that emits blue light, excitation light of any one of ultraviolet light, near ultraviolet light, and blue-violet light can be used. Here, blue-violet light is light having a wavelength in the vicinity of 405 nm, and visible light is light having a wavelength of 410 nm to 650 nm.

  Blue light (excitation light) emitted from the surface-emitting type light emitting diode 1 is reflected by a mirror surface inside the light tunnel 2 or directly transmitted through the dichroic filter 3 to irradiate the phosphor layer 5e. Part of the blue light excites the phosphor in the phosphor layer 5e. The phosphor emits green light (fluorescence) in a diffuse manner. Of the green light emitted from the phosphor, the light emitted downward in the drawing is reflected by the dichroic filter 3 and proceeds to the upper part of the drawing. Therefore, all green light enters the optical space 7 which is the inside of the fluorescent light source unit 6.

  A part of the green light that has entered the optical space 7 goes directly to the opening 8 a of the top plate 8. Part of the green light that has entered the optical space 7 travels toward the opening 8a while being repeatedly reflected by the top plate 8 other than the opening 8a or the mirror surface of the metal substrates 6a, 6b, 6c, and 6d or the dichroic filter 3. The green light reaching the opening 8 a passes through the dichroic filter 9 and is emitted to the outside of the light source device 201. On the other hand, the blue light which has not been used for exciting the phosphor and has entered the optical space 7 is repeatedly reflected by the top plate 8 or the mirror surface of the metal 6a, 6b, 6c, 6d or the dichroic filter 9, while the phosphor layer The phosphors 5a, 5b, 5c, 5d, and 5e are irradiated.

  Of the blue light that enters the optical space 7 and repeats reflection, there is a slight amount of light that passes through the dichroic filter 3 and returns into the light tunnel 2. The blue light returned into the light tunnel 2 is reflected by the surface of the surface-emitting type light emitting diode 1 or the light source mounting substrate 1a, and again travels to the optical space 7 to excite the phosphor. As is clear from the above, the excitation light from the surface emitting type light emitting diode 1 is efficiently used for excitation of the phosphor.

  In the present embodiment, illumination light can be emitted from the opening 8a having a predetermined area without irradiating the phosphor with excessive excitation light. Here, the light-emitting area of the surface-emitting light-emitting diode 1 takes into consideration the amount of light required for the projection display device as the light source device 201, the attenuation of light due to the reflectance inside the light source device 201, and the luminous efficiency of the phosphor. Can be decided.

<Second Embodiment>
FIG. 4 is a perspective view showing a light source device 202 according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view of the light source device 202 according to the second embodiment as viewed from the front side of the drawing with S1-S1 as a cut surface. FIG. 6 is a cross-sectional view of the light source device 202 according to the second embodiment as viewed from the right side of the drawing with S2-S2 as a cut surface.

  In the first embodiment shown in FIG. 1, the light tunnel 2 in which an excitation light source is disposed is provided only on the bottom surface side of the fluorescent light source unit 6. Therefore, in order to obtain the amount of light flux necessary for the system, the light emitting area of the surface emitting type light emitting diode 1 becomes relatively large, and the volume of the light source device 201 becomes large. Increasing the volume of the light source device 201 is disadvantageous from the viewpoint of light attenuation in the light source device 201 because the number of reflections in the light source device 201 increases.

  In the light source device 202 of the second embodiment, as shown in FIGS. 4, 5, and 6, a light tunnel 21 in which an excitation light source is disposed inside is also provided on the side surface of the fluorescent light source unit 6. Specifically, a structure corresponding to the first floor portion of the light source device 201 of the first embodiment is added to the four side surfaces of the second floor portion. In the light source device 202 of the second embodiment, glass is used as the substrates 4a, 4b, 4c, 4d, and 4e of the phosphor assembly. The phosphor layers 5a, 5b, 5c, 5d, and 5e are provided on the glass substrates 4a, 4b, 4c, 4d, and 4e. The phosphor layer 5 is coated (formed) with a predetermined thickness of a phosphor mixed with a binder by a method such as precipitation or printing. Moreover, you may provide a fluorescent substance layer by the method of adhere | attaching the molded article formed by mixing fluorescent substance to glass substrate 4a, 4b, 4c, 4d, 4e.

  The other surface of the phosphor layer 5e of the glass substrates 4a, 4b, 4c, 4d and 4e transmits the wavelength of light corresponding to the light emitted from the surface emitting type light emitting diode 11, and corresponds to the wavelength of fluorescence. A dichroic filter 3 that reflects light is formed. It is also possible to form a dichroic filter on a glass substrate and form a phosphor layer thereon.

  The structure added to the four side surfaces of the fluorescent light source unit 6 is the same as that of the first embodiment. A surface emitting type light emitting diode 11 is provided inside the light source mounting boards 12a, 13a, 14a, and 15a. The four side surfaces are constituted by side members 22a to 22d, 23a to 23d, 24a to 24d, and 25a to 25d, respectively. On the inner side of these side members, a mirror surface with high reflectivity (silver, an aluminum reflective film or the like) is deposited. The four side members 22a to 22d, 23a to 23d, 24a to 24d, and 25a to 25d form a light tunnel 21 that guides light from the surface emitting type light emitting diode 11 upward. It is desirable that the surface of the light tunnel 21 side of 12a, 13a, 14a, 15a is also subjected to a process for increasing the light reflectance.

  In the first embodiment, the number of surface emitting light emitting diodes is one, whereas in the second embodiment, the number of surface emitting light emitting diodes is increased to five. Therefore, the area of the surface-emitting type light-emitting diode can be suppressed to be smaller than the area of the surface-emitting type light-emitting diode in the first embodiment, and the light flux emitted from the opening 8a can be suppressed while suppressing the volume of the optical space 7. Can be increased.

  Also in the second embodiment, illumination light can be emitted from the opening 8a having a predetermined area without irradiating the phosphor with excessive excitation light. Here, the total area of the surface emitting type light emitting diodes takes into consideration the amount of light required for the projection display device as the light source device 202, the attenuation of light due to the reflectance inside the light source device 202, and the luminous efficiency of the phosphor. Can be decided.

  FIG. 7 is a perspective view showing an example of a light source device 202-2 in which the surface emitting type light emitting diode 11 is divided into the surface emitting type light emitting diodes 12 having a smaller area in the light source device 202 of the second embodiment. FIG. 8 is a cross-sectional view of the light source device 202-2 shown in FIG. 7 as viewed from the front side of the drawing with S1-S1 as a cut surface. FIG. 9 is a cross-sectional view of the light source device 202-2 shown in FIG. 7 as viewed from the right side of the drawing with S2-S2 as a cut surface. Compared with the surface-emitting light-emitting diode 11 having a large area, the surface-emitting light-emitting diode 12 having a small area is often cheaper. In this case, the cost of the light source device 202-2 can be suppressed.

<Third Embodiment>
FIG. 10 is a perspective view showing a light source device 203 according to the third embodiment of the present invention. FIG. 11 is a cross-sectional view of the light source device 203 according to the third embodiment as viewed from the front side of the drawing with S1-S1 as a cut surface. FIG. 12 is a cross-sectional view of the light source device 203 according to the third embodiment as viewed from the right side of the drawing with S2-S2 as a cut surface. In the first and second embodiments, a surface emitting type light emitting diode is used as an excitation light source. In the third embodiment, a semiconductor laser 13 is used as a light emission source.

As described above, in the first and second embodiments, the surface light emitting diode 11 returns to the surface of the surface emitting light emitting diode 11 out of the excitation light emitted from the surface emitting light emitting diode 11 although the ratio is small. There is an exciting light coming. The reflectance of the surface of the surface emitting type light emitting diode 11 is about 70%. Therefore, when the returned excitation light is reflected by the surface of the surface-emitting type light emitting diode 11 and re-reflected to the optical space 7, about 30% of the light is lost. Finally, the amount of light emitted from the light source devices 201 and 202 slightly decreases.

  The semiconductor laser 13 has a small light emitting area necessary for obtaining the same luminous flux as compared with the surface emitting type light emitting diode 11. That is, the area of the light source can be reduced while maintaining the volume of the optical space 7 at the same size. Conversely, when the light source device 200 has the same volume, the number of semiconductor lasers 13 can be increased.

<Fourth embodiment>
FIG. 13 is a perspective view showing a light source device 204 according to the fourth embodiment of the present invention. FIG. 14 is a cross-sectional view of the light source device 204 according to the fourth embodiment as viewed from the front side of the drawing with L1 as a cut surface. FIG. 15 is a cross-sectional view of the light source device 204 of the fourth embodiment as viewed from the right side of the drawing with L2 as a cut surface. In the light source device 204 of the fourth embodiment, the semiconductor laser 14 is used as an excitation light source, and the side members 21a to 21d, 22a to 22d, 23a to 23d, 24a to 24d, and 25a to 25d of the light tunnel 21 are tapered. It is

  Since the semiconductor laser 14 has a small light emitting area necessary for obtaining the same luminous flux as compared with a surface emitting type light emitting diode, it is easy to have a tapered structure. Compared with the case without taper, the excitation light returned to the light source light tunnel side is likely to return to the phosphor side when the taper is provided. That is, the blue light that has returned from the optical space 7 to the light tunnel 21 is reincident on the optical space 7 side with a smaller number of reflections (mostly reflected by the reflecting mirror) in the tapered light tunnel 21. Because. In addition, since the reflectance of the reflecting mirror is higher than that of the surface emitting type light emitting diode and the light source mounting substrates 11a, 12a, 13a, 14a, and 15a, light attenuation is small.

  FIG. 16 is a diagram showing a projection display device using the light source device 203 according to the third embodiment of the present invention. The light source device 203 for blue light uses a phosphor layer that emits blue light and a semiconductor laser that emits excitation light of ultraviolet light, near ultraviolet light, or blue-violet light. The light source device 203 for green light uses a phosphor layer that emits green light and a semiconductor laser that emits blue excitation light. The light source device 203 for red light uses a phosphor layer that emits red light and a semiconductor laser that emits blue excitation light. The type of semiconductor laser to be used can be changed according to the characteristics of the phosphor.

  Red light emitted from the light source device 203 passes through the lenses 100r and 101r, green light passes through the lenses 100g and 101g, and blue light passes through 100b and 101b, and then is combined by the cross dichroic mirror 102.

  A polarization conversion element 103 may be inserted between the cross dichroic mirror 102 and the convex lens 104. FIG. 11 shows a case where the polarization conversion element 103 is inserted. Further, FIG. 11 adopts a form in which the three primary color lights are synthesized once and separated again. The merit of combining the three primary color lights once and re-decomposing them is that they can be replaced with the current lamp, and if the polarization conversion element 103 is inserted, only one polarization conversion element 103 is required. When the polarization conversion element 103 is inserted, the light after that becomes P-polarized light (polarized light whose electric field vector is parallel to the paper surface).

  The synthesized light is separated into blue light and red-green light by a B / RG separation cross dichroic mirror 105 through a convex lens 104. The blue light is bent in the optical path by the mirror 106 and passes through the B field lens 109b.

  The blue light that has passed through the B field lens 109b passes through a wire grid type polarization beam splitter (hereinafter referred to as “WG-PBS”) 110b, and the S polarization component of the light modulated by the B device 111b is for B. The light is reflected by the WG-PBS 110b and travels toward the synthetic dichroic prism 112. The red light and green light separated by the B / RG separation cross dichroic mirror 105 are bent in the optical path by the mirror 107 and separated by the RG dichroic mirror 108 into red light and green light. 109r, 109g, and WG-PBS 110r and 110g, and the S-polarized component of the light modulated by the devices 111r and 111g is reflected by the WG-PBS 110r and 110g and then travels toward the combined dichroic prism 112. Three colors are synthesized by the synthesis dichroic prism 112 and projected onto the screen by the projection lens 113.

  FIG. 17 is a diagram showing another example of a projection display device using the light source device 203 according to the third embodiment of the present invention. The light source device 203 for blue light uses a phosphor layer that emits blue light and a semiconductor laser that emits excitation light of ultraviolet light, near ultraviolet light, or blue-violet light. The light source device 203 for green light uses a phosphor layer that emits green light and a semiconductor laser that emits blue excitation light. The light source device 203 for red light uses a phosphor layer that emits red light and a semiconductor laser that emits blue excitation light. The type of semiconductor laser to be used can be changed according to the characteristics of the phosphor.

  The projection display device shown in FIG. 17 is different from the projection display device shown in FIG. 16 in that the cross dichroic mirror 102 and the B / RG separation cross dichroic mirror 105 that synthesize the three primary colors are not used. The red light exiting from the lenses 100r and 101r, the green light exiting from the lenses 100g and 101g, and the blue light exiting from the lenses 100b and 101b travel on their own optical paths. The red light is transmitted through the lenses 1041r and 109r. The green light passes through the lenses 1041g and 109g. Blue light is transmitted through the lenses 1041b and 109b.

  The polarization conversion elements 1031r, 1031g, and 1031b may be inserted after the lenses 100r and 101r (for red light) and the lenses 100g and 101g (for green light) 100b and 101b (for blue light). FIG. 12 shows a case where the polarization conversion element 103 is inserted. When the polarization conversion elements 1031r, 1031g, and 1031b are inserted, the light thereafter is P-polarized light (the electric field vector is parallel to the paper surface).

The blue light that has passed through the B field lens 109b passes through a wire grid type polarization beam splitter (hereinafter referred to as “WG-PBS”) 110b, and the S polarization component of the light modulated by the B device 111b is for B. The light is reflected by the WG-PBS 110b and travels toward the synthetic dichroic prism 112.
The RG light passes through the R field lens 109r and the G field lens 109g, the green light passes through the WG-PBS 110r and 110g, and the S-polarized component of the light modulated by the devices 111r and 111g is WG-PBS 110r. , 110 g, and then toward the composite dichroic prism 112. Three colors are synthesized by the synthesis dichroic prism 112 and projected onto the screen by the projection lens 113.

  In the first to fourth embodiments, the shapes of the light tunnels 2 and 21 and the fluorescent light source unit 6 are rectangular parallelepipeds, but the ratio of the vertical and horizontal heights can be changed as appropriate. The top surface 8 is square, but may be rectangular. Furthermore, the shape of the fluorescent light source unit 6 may be a triangular prism, a regular pentagonal prism, or a regular hexagonal prism. Furthermore, the space other than the top surface 8 in the optical space 7 of the fluorescent light source unit 6 may not be filled with the phosphor assembly. Furthermore, a semiconductor laser can be used for the light source device 201 of the first embodiment, and a surface emitting type light emitting diode can be used for the light source device 204 of the fourth embodiment. Furthermore, as a solid light emitting element as an excitation light source, a solid light emitting element such as an electroluminescent element (EL) can be used in addition to a surface emitting type light emitting diode and a semiconductor laser.

DESCRIPTION OF SYMBOLS 1, 11, 12 Surface emitting type light emitting diode 13, 14 Semiconductor laser diode 1a, 11a, 12a, 13a, 14a, 15a Light source mounting board 2, 21 Light tunnel 2a, 2b, 2c, 2d Light tunnel side surface 21a, 21b, 21c, 21d Light tunnel side surface 22a, 22b, 22c, 22d Light tunnel side surface 23a, 23b, 23c, 23d Light tunnel side surface 24a, 24b, 24c, 24d Light tunnel side surface 25a, 25b, 25c, 25d Light tunnel side surface 3 Dichroic filter 4 4a, 4b, 4c, 4d Glass substrate 5, 5a, 5b, 5c, 5d Phosphor layer 6 Fluorescent light source 6a, 6b, 6c, 6d Metal substrate 7 Optical space, 8 Top surface, 8a Opening, 9 Dichroic filter 100r, 100g 100b lenses 101 r, 101g, 101b lens 102 Synthesis cross dichroic mirror 103,1031r, 1031g, 1031b polarization conversion element,
104, 1041r, 1041g, 1041b lens,
105 B / RG separation cross dichroic mirror, 106 mirror,
107 mirror, 108 RG dichroic mirror,
109r, 109g 109b field lens,
110r, 110g, 110b Wire grid type polarization beam splitter (WG-PBS),
111r, 111g, 111b device 112 composite dichroic prism, 113 projection lens,
201, 202, 202-2, 203, 204 Light source device

Claims (3)

A fluorescent light source unit including a phosphor layer and an opening through which the fluorescence emitted from the phosphor layer is emitted;
An excitation light source for exciting the phosphor of the phosphor layer;
A light tunnel adjacent to the fluorescent light source unit and containing the excitation light source;
A light source device comprising:   The light source device according to claim 1, further comprising a dichroic filter that transmits an emission light wavelength from an excitation light source and reflects the emission light wavelength from the phosphor between the light tunnel and the phosphor layer.   The light source device according to claim 1, wherein the opening includes a dichroic filter that reflects an emission light wavelength from an excitation light source and transmits an emission light wavelength from the phosphor.

Images