JP5915063B2 - Phosphor device, lighting apparatus and projector apparatus - Google Patents

Description

  The present invention relates to a phosphor device that emits emitted light emitted by irradiating a phosphor with excitation light, an illumination device that outputs illumination light of each color using the phosphor device, and an output from the illumination device. The present invention relates to a projector device that projects as a color image using illumination light.

Some light source devices use a light emitter that emits light having a wavelength different from the wavelength of the excitation light by irradiating the excitation light output from the light source. This light source device is used as various light sources such as a lighting device and an image display device.
In such a light source device, a light emitting diode (LED) or a laser diode (LD) is generally used as a light source, for example, as a semiconductor light source. For example, a transparent phosphor or epoxy resin or the like is used as a resinous binder, and a plurality of phosphors are dispersed in the resinous binder to form a light emitting layer.

  This resinous binder is deteriorated by excitation light from a semiconductor light source, or damaged when the intensity of excitation light is particularly strong. In addition, since the resin such as silicone or epoxy resin in which the phosphor is scattered has low thermal conductivity, the temperature of the phosphor increases, and the emission wavelength emitted from the phosphor shifts or emits light due to this temperature increase. Phenomena such as temperature quenching where the strength decreases occur. For this reason, the brightness | luminance as a light source device will fall.

  For example, Patent Document 1 discloses the use of a light-transmitting inorganic material such as glass as a member that replaces such a resinous binder such as transparent silicone or epoxy resin, and Patent Documents 2 and 3 disclose heat conduction. The use of high ceramics is disclosed.

JP 2003-258308 A JP 2006-282447 A JP 2010-024278 A

  However, the phosphor light-emitting layer formed using the above-mentioned light-transmitting ceramic binder (translucent ceramic binder) is used to replace the phosphor light-emitting layer formed using the previous resinous binder. Often done. For this reason, the translucent ceramic binder does not have a structure suitable as a light source device that emits emitted light from a light emitter.

  An object of the present invention is to provide a phosphor device, an illuminating device, and a projector device that have a structure suitable for emitting emitted light from a light emitter, and that can efficiently emit light emitted from the light emitter. is there.

A phosphor device according to a main aspect of the present invention includes at least a phosphor and is formed into a frustum shape , and has a first bottom surface having a small area among the two bottom surfaces of the frustum shape , and the first device. The excitation light from the outside for exciting the phosphor is transmitted to a part of the slope adjacent to the bottom surface of the first light source, and the emitted light emitted from the phosphor is emitted from the two bottom surfaces having a large area. Forming a first film that reflects toward the bottom surface, arranging a plurality of phosphor devices that transmit the emitted light through the second bottom surface , and each of the plurality of phosphor devices includes The two bottom surfaces are arranged on the same plane and are integrally formed .

Lighting apparatus according to the main aspect of the present invention, the irradiation with the fluorescent device, a pumping light source for outputting pumping light, the pumping light outputted from the pumping light source to said first bottom surface of the phosphor device And a condensing optical system that condenses the emitted light emitted from the second bottom surface of the phosphor device and extracts it as illumination light.

A projector device according to a main aspect of the present invention includes the illumination device and a projection optical system that projects a color image using light of each color including the illumination light output from the illumination device.

  According to the present invention, it is possible to provide a phosphor device, an illumination device, and a projector device that have a structure suitable for emitting emitted light from a light emitter and can emit light emitted from the light emitter efficiently.

1 is a structural diagram showing a phosphor device according to a first embodiment of the present invention. FIG. 5 is a structural diagram showing a phosphor device according to a second embodiment of the present invention. FIG. 6 is a structural diagram showing a phosphor device according to a third embodiment of the present invention. The block diagram which shows the illuminating device using the fluorescent substance device which concerns on the 4th Embodiment of this invention. The block diagram which shows the illuminating device using two fluorescent substance devices which concern on the 5th Embodiment of this invention. The block diagram which shows the prior art of the phosphor device which concerns on this invention. The figure which shows the partial overlap with the wavelength of the long wavelength side of the excitation spectrum and the wavelength of the short wavelength side of the emission spectrum of a light-emitting body in the prior art. The schematic diagram for demonstrating the phenomenon of self-absorption of light emission in the prior art. The block diagram which shows the illuminating device using the several fluorescent substance device which concerns on the 6th Embodiment of this invention. The block diagram which shows the some phosphor device in the same apparatus. The block diagram which shows the projector apparatus using the illuminating device which concerns on the 7th Embodiment of this invention.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
1A and 1B are structural views of a phosphor device, FIG. 1A is an external view, and FIG. 1B is a cross-sectional structural view. The phosphor device 1 is formed by sintering a light-transmitting inorganic material (hereinafter referred to as an inorganic binder) 2 such as Al203 and a plurality of phosphors 3 such as YAG: Ce. The plurality of phosphors 3 are scattered in the inorganic binder 2 at, for example, uniform intervals. These phosphors 3 emit green (wavelength values within a wavelength of 492 to 577 nm) emission light, for example, when irradiated with excitation light E of blue (wavelength values within a wavelength of 455 to 492 nm).

The phosphor device 1 is formed in a truncated cone shape such as a quadrangular frustum shape by sintering the inorganic binder 2 and each phosphor 3. Incidentally, the phosphor device 1 is not limited to the quadrangular pyramid shape as a frustum, and may be hexagonal cone shape or circular truncated cone shape.
Specifically, the phosphor device 1 includes four side surfaces 4-1 to 4-4 for forming a quadrangular frustum shape, and first and second surfaces 4-5 that are two bottom surfaces facing each other in parallel. 4-6.
Four sides 4-1 to 4-4, to form a slope for forming a quadrangular frustum shape. The inclination angle θ of the side surfaces 4-1 to 4-4, for example, the angle θ formed by the side surface 4-1 and the first surface 4-5 is, for example, 45 ° as shown in FIG. Yes. Each inclination angle θ formed by the other side surfaces 4-2 to 4-4 and the first surface 4-5 is also set to 45 °, for example.

The first surface 4-5 and the second surface 4-6 are provided so as to intersect with the side surfaces 4-1 to 4-4, which are frustum-shaped inclined surfaces, respectively. Of these, the first surface 4-5 has an area S1.
The second surface 4-6 has an area S2. The area S1 of the first surface 4-5 is smaller than the area S2 of the second surface 4-6.

  A dichroic film 5 as a first film is formed on the entire surfaces of the side surfaces 4-1 to 4-4 and the first surface 4-5. The dichroic film 5 transmits, for example, light having a wavelength value in a wavelength band (455 to 492 nm), that is, blue excitation light E, and light having a wavelength value in a wavelength region (492 to 577 nm), that is, each light emitter 3. It has the characteristic of reflecting the green emitted light emitted by. The dichroic film 5 is made of, for example, a metal oxide or fluoride. Typical examples of these metal oxides or fluorides include TiO2, MgF2, SiO2, and Al2O3. The side surfaces 4-1 to 4-4 and the first surface 4-5 are incident surfaces of the excitation light E. Hereinafter, the side surfaces 4-1 to 4-4 and the first surface 4-5 are referred to as incident side surfaces 4-1 to 4-4 and 4-5 of the excitation light E, respectively.

  On the second surface 4-6, the excitation light reflecting dichroic mirror 6 is formed as a second film. The excitation light reflecting dichroic mirror 6 reflects, for example, light having a wavelength value in a wavelength band (455 to 492 nm), that is, blue excitation light E, and light having a wavelength value in a wavelength band (492 to 577 nm), that is, Each of the light emitters 3 has a characteristic of transmitting green light emitted. The excitation light reflecting dichroic mirror 6 is made of, for example, metal oxide or fluoride. Typical examples of these metal oxides or fluorides include TiO2, MgF2, SiO2, and Al2O3. The second surface 4-6 serves as an emission surface of green emitted light emitted from each light emitter 3. Hereinafter, the second surface 4-6 is referred to as an emission surface 4-6 for green emission light.

  In such a phosphor device 1, for example, when blue excitation light E (wavelength value within a wavelength of 455 to 492 nm) enters the phosphor device 1 from the incident side surfaces 4-1 to 4-4 and 4-5. The excitation light E is applied to a plurality of phosphors 3 scattered in the inorganic binder 2. Each of these phosphors 3 is excited by irradiation with excitation light E and emits light with an arbitrary wavelength distribution. For example, each phosphor 3 emits, for example, green light (wavelength value within a wavelength of 492 to 577 nm). Since these phosphors 3 emit light with equal amounts of light in all directions, each light emitted from each phosphor 3 is emitted in all directions in the inorganic binder 2.

Among these, each light emitted from each phosphor 3 toward the emission surface 4-6 passes through the emission surface 4-6 and is emitted toward the outside of the phosphor device 1.
Each emitted light emitted from each phosphor 3 toward the incident side surface 4-5 is reflected by the dichroic film 5 formed on the incident side surface 4-5 and travels toward the emission surface 4-6. 4-6 is transmitted and emitted toward the outside of the phosphor device 1.
Further, each emitted light emitted from each phosphor 3 is reflected by the dichroic film 5 formed on the incident side surface 4-5 and subsequently formed on the incident side surfaces 4-1 to 4-4. There is also emitted light that is reflected by the dichroic film 5 being directed toward the incident / exiting surface 4-6 and transmitted through the incident / exiting surface 4-6 toward the outside of the phosphor device 1.
The respective emitted lights emitted from the respective phosphors 3 toward the respective incident side surfaces 4-1 to 4-4 are reflected by the dichroic films 5 formed on the respective incident side surfaces 4-1 to 4-4. Head to face 4-6. Since these incident side surfaces 4-1 to 4-4 are formed on, for example, a 45 ° slope on each side surface of the quadrangular pyramid, each light emission reflected by the dichroic film 5 on these incident side surfaces 4-1 to 4-4. The light is efficiently guided to the emission surface 4-6, and passes through the emission surface 4-6 to be emitted toward the outside of the phosphor device 1.

  Thereby, each emitted light emitted by each phosphor 3 is reflected by the emitted light directly directed to the emission surface 4-6 and the dichroic film 5 on each incident side surface 4-1 to 4-4, 4-6. The emitted light is directed toward the emission surface 4-6, and the emitted light is combined, transmitted through the emission surface 4-6, and emitted to the outside of the phosphor device 1.

As described above, according to the first embodiment, the inorganic binder 2 in which the plurality of phosphors 3 are scattered is formed in a quadrangular frustum shape, and the incident side surfaces 4-1 of four inclined surfaces are formed in the quadrangular frustum shape. 4-4, an incident side surface 4-5 and an exit surface 4-6 that are parallel to each other, and the dichroic film 5 is formed on the four incident side surfaces 4-1 to 4-4 and the incident side surface 4-5. The emitted light emitted from the phosphor 3 in all directions is emitted directly from the emission surface 4-6 toward the outside of the phosphor device 1 or the entire surfaces of the incident side surfaces 4-1 to 4-4 and 4-5. After being reflected by the dichroic film 5 formed on the surface, the light is emitted toward the outside of the phosphor device 1 through the emission surface 4-6, and the emitted light emitted from each phosphor 3 is efficiently fluorescent. The light can be emitted to the outside of the body device 1.
Phosphor device 1 is not limited to the quadrangular pyramid shape as a frustum shape, even hexagonal frustum-shaped or circular frustum shape can achieve the same effect as in the first embodiment.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a cross-sectional structural view of the phosphor device. In addition, the same code | symbol is attached | subjected to FIG. 1 (a) and the same part as (b), and the detailed description is abbreviate | omitted.
In this phosphor device 1, the dichroic film 5 is formed on the incident side surface 4-5, and the reflecting films 10-1 to 10-4 are formed on the incident side surfaces 4-1 to 4-4 of the four side surfaces. . These reflective films 10-1 to 10-4 are integrally formed on the incident side surfaces 4-1 to 4-4. The reflective film 10-4 formed on the incident side surface 4-4 is omitted because of the illustrated direction.
These reflective films 10-1 to 10-4 have characteristics of reflecting light having a wavelength value in the wavelength band (492 to 577 nm), that is, green light emitted by each light emitter 3. These reflective films 10-1 to 10-4 are formed of, for example, a metal reflective film such as silver or aluminum, or a multilayer optical reflective film formed by laminating a metal oxide or fluoride. Thereby, each of the side surfaces 4-1 to 4-4 becomes a reflection surface that reflects the green light emitted by each light emitter 3.

  In the case of such a phosphor device 1, for example, when excitation light E of blue (wavelength value within a wavelength of 455 to 492 nm) enters the phosphor device 1 from the incident side surface 4-5, the excitation light E is inorganic. A plurality of phosphors 3 scattered in the binder 2 are irradiated. Similarly to the above, these phosphors 3 are excited by irradiation with the excitation light E and emit, for example, green light (wavelength value within a wavelength of 492 to 577 nm).

  Of these, each light emitted from each phosphor 3 toward the emission surface 4-6 is transmitted through the emission surface 4-6 and emitted toward the outside of the phosphor device 1, and the incident side surface 4 from each phosphor 3 is emitted. Each emitted light emitted toward -5 is reflected by the incident side surface 4-5 and directed to the emission surface 4-6, and is transmitted through the emission surface 4-6 toward the outside of the phosphor device 1. Exit.

The respective emitted lights emitted from the respective phosphors 3 toward the respective side surfaces 4-1 to 4-4 are reflected by the respective reflection films 10-1 to 10-4 and directed toward the emission surface 4-6. These reflective films 10-1 to 10-4 are formed on the slopes of the on each respective side of the square frustum 4-1 to 4-4 for example 45 °, these reflective films 10-1 through 10-4 Each of the emitted light reflected by the light is efficiently guided to the emission surface 4-6, passes through the emission surface 4-6, and is emitted toward the outside of the phosphor device 1.
As described above, according to the second embodiment, the dichroic film 5 is formed on the incident side surface 4-5, and the reflecting films 10-1 to 10- are formed on the incident side surfaces 4-1 to 4-4 on the four side surfaces. Needless to say, even if 4 is formed, the same effects as those of the first embodiment can be obtained.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings.
FIG. 3 shows a cross-sectional structure diagram of the phosphor device 1. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
In this phosphor device 1, a thin antireflection film 20 is formed on the exit surface 4-6. The anti-reflection film 20, for example to prevent the reflection of light in the visible area of the wavelength 400 nm to 700 nm. The antireflection film 20 is made of, for example, a multilayer optical antireflection film in which metal oxides, fluorides, and the like are laminated. Typical examples of these metal oxides and fluorides include TiO2, MgF2, SiO2, and Al2O3. The antireflection film 20 may be formed, for example, in an antireflection structure having a fine concavo-convex shape with a pitch having a wavelength smaller than the wavelength of visible light. The antireflection film 20 is formed, for example, by transferring from a mold at the time of sintering when manufacturing the phosphor device 1 or by etching.

  In the case of such a phosphor device 1, for example, when excitation light E of blue (wavelength value within a wavelength of 455 to 492 nm) enters the phosphor device 1 from the incident side surface 4-5, the excitation light E is inorganic. A plurality of phosphors 3 scattered in the binder 2 are irradiated. Similarly to the above, these phosphors 3 are excited by irradiation with the excitation light E and emit, for example, green light (wavelength value within a wavelength of 492 to 577 nm).

  Of these, each light emitted from each phosphor 3 toward the emission surface 4-6 passes through the antireflection film 20 formed on the emission surface 4-6 and is emitted toward the outside of the phosphor device 1. The emitted light emitted from each phosphor 3 toward the incident side surface 4-5 is reflected by the incident side surface 4-5 and travels toward the exit surface 4-6, and is formed on the exit surface 4-6. The light is transmitted through the antireflection film 20 and emitted toward the outside of the phosphor device 1.

The respective emitted lights emitted from the respective phosphors 3 toward the respective side surfaces 4-1 to 4-4 are reflected by the respective reflection films 10-1 to 10-4 and directed toward the emission surface 4-6. These reflective films 10-1 to 10-4 are formed on the slopes of the on each respective side of the square frustum 4-1 to 4-4 for example 45 °, these reflective films 10-1 through 10-4 Each of the emitted light reflected by the light is efficiently guided to the emission surface 4-6, passes through the antireflection film 20 formed on the emission surface 4-6, and is emitted toward the outside of the phosphor device 1.
As described above, according to the third embodiment, since the antireflection film 20 is formed on the emission surface 4-6, in addition to the effect of the first embodiment, for example, a visible region having a wavelength of 400 nm to 700 nm. It is possible to prevent reflection of light having a wavelength in the range .
In addition, although the example which formed the anti-reflective film 20 in the output surface 4-6 of the phosphor device 1 shown in FIG. 3 was demonstrated, not only this but the output surface 4-6 of the phosphor device 1 shown in FIG. You may form in.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to the drawings.
FIG. 4 shows a configuration diagram of an illumination device 30 using the phosphor device 1. In addition, the same code | symbol is attached | subjected to FIG. 1 (a) and the same part as (b), and the detailed description is abbreviate | omitted.
This lighting device 30 uses the phosphor device 1 shown in FIGS.
A semiconductor laser 31 is provided as an excitation light source. The semiconductor laser 31 outputs, as excitation light E, for example, excitation laser light (hereinafter referred to as excitation laser light E) having a wavelength value within a blue wavelength region (455 to 492 nm).

On the optical path of the excitation laser light E output from the semiconductor laser 31, a collimator lens 32, the phosphor device 1, and a condensing optical system 33 are provided.
The collimator lens 12 collimates the excitation laser beam E output from the semiconductor laser 11 and irradiates the entire incident side surfaces 4-1 to 4-5 of the phosphor device 1. The collimator lens 12 is not the entire surfaces of the incident side surfaces 4-1 to 4-5, but, for example, the entire surfaces of the incident side surfaces 4-5 and the incident side surfaces 4-1 to 4-1 that are continuous with the outer periphery of the incident side surface 4-5. You may make it irradiate the excitation laser beam E to a 4-4 partial surface.
The condensing optical system 14 condenses the emitted light emitted from the phosphor device 1 and extracts it as illumination light H.

With such an illumination device, when the excitation laser light E having a blue wavelength value is output from the semiconductor laser 11, the excitation laser light E is collimated by the collimator lens 12 and is incident on each incident side surface of the phosphor device 1. For example, the entire surface of 4-1 to 4-4 and 4-5 is irradiated.
In this phosphor device 1, similarly to the above, the excitation laser light E is irradiated to the plurality of phosphors 3 scattered in the inorganic binder 2. Each of these phosphors 3 is excited by irradiation with excitation laser light E and emits, for example, green (wavelength value within a wavelength of 492 to 577 nm) emission light. Among these, each light emitted from each phosphor 3 toward the emission surface 4-6 passes through the emission surface 4-6 and is emitted toward the outside of the phosphor device 1. Each emitted light emitted from each phosphor 3 toward the incident side surface 4-5 is reflected by the dichroic film 5 formed on the incident side surface 4-5 and travels toward the emission surface 4-6. 4-6 is transmitted and emitted toward the outside of the phosphor device 1. The respective emitted lights emitted from the respective phosphors 3 toward the respective incident side surfaces 4-1 to 4-4 are reflected by the dichroic films 5 formed on the respective incident side surfaces 4-1 to 4-4. It goes to the surface 4-6, passes through the exit surface 4-6, and exits to the outside of the phosphor device 1.
The emitted light of the green wavelength value emitted from the phosphor device 1 is condensed by the condensing optical system 33 and extracted as illumination light H.

As described above, according to the fourth embodiment, the phosphor device 1 is provided, and the phosphor device 1 is irradiated with the excitation laser light E having the blue wavelength value output from the semiconductor laser 11 through the collimator lens 32. Since the emitted light H having a green wavelength value emitted from the phosphor device 1 is extracted through the condensing optical system 34, the emitted light from each phosphor 3 efficiently extracted from the phosphor device 1 is output as illumination light. it can.
In the fourth embodiment, the phosphor device 1 shown in FIGS. 1A and 1B is used. However, the present invention is not limited to this, and the phosphor device 1 shown in FIG. 2 or 3 is used. Also good. Among these, when the illuminating device 30 is configured using the phosphor device 1 shown in FIG. 3, since the antireflection film 20 is formed on the emission surface 4-6 in the phosphor device 1, The emitted light emitted and the excitation laser light E that has not been used for exciting the phosphor 3 are transmitted through the antireflection film 20 formed on the emission surface 4-6 and emitted to the outside of the phosphor device 1. To do. The emitted light emitted from the phosphors 3 and the excitation laser light E that is not used for excitation of the phosphors 3 are collected by the condensing optical system 14 and mixed with the emitted light and the excitation laser light E. The illumination light H is extracted.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to the drawings.
FIG. 5 shows a configuration diagram of an illumination device 30 using the phosphor device 1. The same parts as those in FIG. 4 are denoted by the same reference numerals and detailed description thereof is omitted.
Two phosphor devices 1, 1 are arranged on the optical path of the excitation laser beam E output from the semiconductor laser 31. The phosphor devices 1 and 1 are integrally arranged, and the incident / exit surfaces 4-6, which are the second surfaces, are arranged on the same plane. The phosphor devices 1 and 1 are disposed within the irradiation range of the excitation laser beam E.

In the case of such an illuminating device 30, when the excitation laser light E having a blue wavelength value is output from the semiconductor laser 31, the excitation laser light E is collimated by the collimator lens 32 to be two phosphor devices 1, For example, the entire surface of the dichroic film 5 formed on each of the incident side surfaces 4-1 to 4-5 is irradiated.
In these phosphor devices 1, 1, similarly to the above, the excitation laser light E is applied to the plurality of phosphors 3 scattered in the inorganic binder 2. Each of these phosphors 3 is excited by irradiation with excitation laser light E and emits, for example, green (wavelength value within a wavelength of 492 to 577 nm) emission light. Among these, each light emitted from each phosphor 3 toward the emission surface 4-6 passes through the emission surface 4-6 and is emitted toward the outside of the phosphor device 1. Each emitted light emitted from each phosphor 3 toward the incident side surface 4-5 is reflected by the dichroic film 5 formed on the incident side surface 4-5 and travels toward the emission surface 4-6. 4-6 is transmitted and emitted toward the outside of the phosphor device 1. The respective emitted lights emitted from the respective phosphors 3 toward the respective incident side surfaces 4-1 to 4-4 are reflected by the dichroic films 5 formed on the respective incident side surfaces 4-1 to 4-4. It goes to the surface 4-6, passes through the exit surface 4-6, and exits to the outside of the phosphor device 1.

The emitted light of the green wavelength value emitted from the phosphor devices 1 and 1 is collected by the condensing optical system 33 and extracted as illumination light H.
As described above, according to the fifth embodiment, since the two phosphor devices 1 and 1 are integrally disposed and disposed within the irradiation range of the excitation laser light E, the two phosphor devices 1 and 1 are arranged. By outputting the emitted light from each phosphor 3 efficiently extracted from 1 as illumination light, it is possible to extract illumination light with a greater amount of illumination than the illumination light extracted from one phosphor device 1. .

By the way, in the illumination device, the semiconductor laser 31 as the excitation light source is provided outside the inorganic binder 40 including the phosphor 3 as shown in FIG. 6A, for example, or as shown in FIG. 40 is provided inside. In FIG. 2A, the inorganic binder 40 is provided on the substrate 41 with a reflective film 42 interposed therebetween. In FIG. 2B, the inorganic binder 40 is provided in a hole 44 having an inclined surface formed in the substrate 43. A reflective film 45 is formed on the inclined surface formed on the substrate 43.
As shown in FIG. 7, the phosphor 3 generally used in such an illuminating device is a part of the wavelength on the long wavelength side of the excitation spectrum S1 and the wavelength on the short wavelength side of the emission spectrum S2 of the light emitting body 3. Are overlapping. That is, the light emitter 3 emits the emitted light 3a as shown in FIG. 8, but this emitted light 3a propagates through the inorganic binder 40 and is irradiated to the other light emitter 3 to cause the other light emitter 3 to be emitted. There is a possibility that a phenomenon of self-absorption of light emission in which the light emission intensity of the phosphor 3 is lowered by exciting another activation atom, that is, exciting another activated atom, may occur.

  In contrast, in the fifth embodiment, for example, emitted light having a green wavelength value emitted from the plurality of phosphors 3 scattered in the inorganic binders 2 of the two phosphor devices 1 and 1. Are emitted directly from the respective emission surfaces 4-6 toward the outside of the respective phosphor devices 1, 1, or formed on the respective incident side surfaces 4-1 to 4-5 of the two phosphor devices 1, 1. The light is reflected by the dichroic film 5 and then efficiently emitted through the emission surfaces 4-6, so that a phenomenon of self-absorption of light emission in which the emission intensity of the phosphor 3 is reduced by exciting another activated atom. There is no risk of occurrence. In the first to fourth embodiments, the phenomenon of self-absorption of light emission does not occur.

[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described with reference to the drawings.
FIG. 9 shows an external view of a phosphor device 50 in which two or more phosphor devices 1 are arranged. The phosphor device 50 is not limited to the arrangement of the two phosphor devices 1 and 1 as in the fifth embodiment, but two or more phosphor devices 1, for example, an external view of FIG. As shown in FIG. 4, four phosphor devices 1, 1,..., 1 are arranged in a lattice shape (matrix shape). These phosphor devices 1, 1,..., 1 are formed integrally, for example, as shown in the sectional view of FIG. Yes. These phosphor devices 1, 1,..., 1 are arranged within the irradiation range of the excitation laser beam E.

  The plurality of phosphor devices 1, 1,..., 1 are not limited to four, and four or more may be arranged in a lattice shape (matrix shape). In addition, the plurality of phosphor devices 1, 1,..., 1 are not limited to being arranged in a grid (matrix), but may be arranged in the vertical and horizontal directions at regular intervals or concentrically. Alternatively, they may be arranged at random positions.

  When the lighting device 30 is configured using these phosphor devices 1, 1,..., 1, the phosphor devices 1, 1,..., 1 replace the two phosphor devices 1, 1 shown in FIG. The plurality of phosphor devices 1, 1,..., 1 are arranged on the optical path of the excitation laser light E output from the semiconductor laser 31.

In the case of such an illuminating device 30, when the excitation laser light E having a blue wavelength value is output from the semiconductor laser 31, the excitation laser light E is collimated by the collimator lens 32, and the four phosphor devices 1, For example, the entire surface of the dichroic film 5 formed on each of the incident side surfaces 4-1 to 4-5 is irradiated.
In these phosphor devices 1, 1,..., As described above, when the excitation laser light E is applied to the plurality of phosphors 3 scattered in the inorganic binder 2, the phosphors 3 are respectively For example, green light (wavelength value within a wavelength of 492 to 577 nm) is emitted by being excited by irradiation with the excitation laser beam E. Among these, each light emitted from each phosphor 3 toward the emission surface 4-6 passes through the emission surface 4-6 and is emitted toward the outside of the phosphor device 1. Each emitted light emitted from each phosphor 3 toward the incident side surface 4-5 is reflected by the dichroic film 5 formed on the incident side surface 4-5 and travels toward the emission surface 4-6. 4-6 is transmitted and emitted toward the outside of the phosphor device 1. The respective emitted lights emitted from the respective phosphors 3 toward the respective incident side surfaces 4-1 to 4-4 are reflected by the dichroic films 5 formed on the respective incident side surfaces 4-1 to 4-4. It goes to the surface 4-6, passes through the exit surface 4-6, and exits to the outside of the phosphor device 1.
The emitted light of the green wavelength value emitted from these phosphor devices 1, 1,..., 1 is condensed by the condensing optical system 33 and taken out as illumination light H.

As described above, according to the sixth embodiment, since the plurality of phosphor devices 1, 1,..., 1 are arranged integrally and within the irradiation range of the excitation laser beam E, a plurality of fluorescence devices are arranged. The light emitted from each phosphor 3 efficiently extracted from the body devices 1, 1,... 1 is output as illumination light, so that the amount of illumination light is larger than the illumination light extracted from one phosphor device 1. The illumination light can be taken out.
In the sixth embodiment, the phosphor devices 1 shown in FIGS. 1A and 1B are arranged in a lattice shape (matrix shape). However, the present invention is not limited to this, and FIG. 2 or FIG. The illustrated phosphor devices 1 may be arranged in a plurality of grids (matrix).

[Seventh Embodiment]
Next, a seventh embodiment of the present invention will be described with reference to the drawings.
FIG. 11 shows a configuration diagram of a projector device 60 using the illumination device 30 or the like shown in FIG. The projector device 60 employs, for example, a DLP (Digital Light Processing: registered trademark) method using a semiconductor light emitting element. The projector device 60 is equipped with a CPU 61. An operation unit 62, a main memory 63, and a program memory 64 are connected to the CPU 61. Further, an input unit 66, an image conversion unit 67, a projection processing unit 68, and an audio processing unit 69 are connected to the CPU 61 via a system bus 65. Among these, the light source unit 70 and the micromirror element 71 are connected to the projection processing unit 68. A mirror 72 is disposed on the optical path of the illumination light output from the light source unit 70, and a micromirror element 71 is disposed on the reflected light path of the mirror 72. A projection lens unit 73 is disposed on the reflected light path of the micromirror element 71. A speaker unit 74 is connected to the audio processing unit 79.

The input unit 66 inputs analog image signals of various standards, and sends the analog image signals to the image conversion unit 67 through the system bus 65 as digitized image data.
The image conversion unit 67 is also called a scaler, and unifies the image data input from the input unit 66 into image data of a predetermined format suitable for projection, and sends the image data to the projection processing unit 68. At this time, the image conversion unit 67 also superimposes data such as symbols indicating various operation states for OSD (On Screen Display) on the image data as necessary, and supplies the processed image data to the projection processing unit 68. send.

The projection processing unit 68 multiplies the frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations according to the image data sent from the image conversion unit 67. The micromirror element 71 that is a spatial light modulation element is driven by the high-speed time-division driving.
The sound processing unit 69 includes a sound source circuit such as a PCM (Pulse-Cod Modulation) sound source, converts the sound data given during the projection operation into an analog signal, and drives the speaker unit 54 to emit a loud sound, or a beep sound if necessary. Is generated.

The micromirror element 71 is, for example, WXGA (Wide eXtended Graphics Array), and is formed by arranging a plurality of micromirrors in an array, for example, a plurality of micromirrors arranged in horizontal x vertical (1250 x 800 pixels). An optical image is formed by the reflected light by displaying an image by turning on and off the tilt angles of these micromirrors at high speed.
The light source unit 70 sequentially and sequentially emits illumination lights of a plurality of colors including primary color lights of red (R), green (G), and blue (B) in a time division manner. The RGB lights sequentially emitted from the light source unit 70 are totally reflected by the mirror 72 and are applied to the micromirror element 71. An optical image is formed by the reflected light from the micromirror element 71, and the formed optical image is projected and displayed as a color image on a screen to be projected through a projection lens unit 73 as a projection optical system.

For example, the light source unit 70 includes the illumination device 30 shown in FIG. The light source unit 70 includes, for example, a semiconductor laser that outputs laser light having a wavelength value in the red (R) wavelength region (622 to 777 nm) and a wavelength value in the blue (B) wavelength region (455 to 492 nm). The semiconductor laser 11 that outputs laser light and the illumination device 30 shown in FIG. 4 that uses the laser light output from the semiconductor laser 31 as excitation light and outputs emitted light having a green (G) wavelength value as illumination light. These red (R), green (G), and blue (B) illumination lights are sequentially emitted in a time-sharing manner.
The light source unit 70 is not limited to the illumination device 30 shown in FIG. 4, but the illumination device 30 shown in FIG. 5 and the like, and the plurality of phosphor devices 1, 1,..., 1 shown in FIGS. You may use the illuminating device using.

The CPU 61 receives an operation instruction from the operation unit 62, reads / writes data from / to the main memory 63, and executes a program stored in the program memory 64. The CPU 61 controls the input unit 66, the image conversion unit 67, the projection processing unit 68, and the sound processing unit 69 via the system bus 65. That is, the CPU 61 uses the main memory 63 and the program memory 64 to execute a control operation in the projector device 60.
The main memory 63 is constituted by an SRAM, for example, and functions as a work memory for the CPU 61. The program memory 64 is composed of an electrically rewritable nonvolatile memory, and stores an operation program executed by the CPU 61 and various fixed data.

  The CPU 61 executes various projection operations according to key operation signals from the operation unit 62. The operation unit 62 includes a key operation unit provided in the main body of the projector device 60 and an infrared light receiving unit that receives infrared light from a dedicated remote controller of the projector device 60. A key operation signal based on a key operated by the control unit or the remote controller is directly sent to the CPU 61.

With such a configuration, when analog image signals of various standards are input to the input unit 66, the input unit 66 sends the analog image signal to the image conversion unit 67 through the system bus 65 as digitized image data.
The image conversion unit 67 unifies the image data input from the input unit 66 into image data of a predetermined format suitable for projection, and data such as symbols indicating various operating states for OSD as necessary. The image data is superimposed and processed, and the processed image data is sent to the projection processing unit 68.

The projection processing unit 68 sets a frame rate according to a predetermined format in accordance with the image data sent from the image conversion unit 67, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations. The micromirror element 71, which is a spatial light modulation element, is driven by the multiplied high-speed time division drive.
The micromirror element 71 displays an image by driving the projection processing unit 68 to turn on and off the tilt angles of the plurality of micromirrors at high speed, thereby forming an optical image with the reflected light.

On the other hand, the light source unit 70 includes, for example, green (G) illumination light output from the illumination device 30 illustrated in FIG. 4 and blue (B) wavelength laser light output from the semiconductor laser 31, Laser light of red (R) wavelength value output from the semiconductor laser is sequentially emitted as illumination light in a time-sharing manner. The RGB illumination light sequentially emitted from the light source unit 70 is totally reflected by the mirror 72 and applied to the micromirror element 71. An optical image is formed by the reflected light from the micromirror element 71, and the formed optical image is projected and displayed as a color image on a screen to be projected through a projection lens unit 73 as a projection optical system.
At the same time, the sound processing unit 69 converts the sound data given during the projection operation into an analog signal, and drives the speaker unit 64 to emit a loud sound, or generates a beep sound or the like as necessary.

  As described above, according to the fifth embodiment, the projector device 60 is configured using the illumination device 30 shown in FIG. 4 or the illumination device 30 shown in FIG. A color image can be projected and displayed on the screen using the emitted light from each phosphor 3 efficiently taken out from the device 1 as illumination light.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

Hereinafter, the characteristic points at the beginning of the application of the present invention will be described.
The invention corresponding to claim 1 is formed in the shape of a cone containing at least a phosphor, and forms first and second surfaces having different areas across the cone-shaped slope and facing each other. Then, excitation light from the outside for exciting the phosphor is applied to a surface side including at least the first surface having a small area and a part of the inclined surface of the first and second surfaces. A first film that transmits and reflects emitted light emitted from the phosphor toward the second surface is formed, and the emitted light is transmitted through the second surface and emitted. A phosphor device.

The invention corresponding to claim 2 is the phosphor device corresponding to claim 1, wherein a second film that reflects the excitation light and transmits the emitted light is formed on the second surface. Features.
The invention corresponding to claim 3 is the phosphor device according to claim 1 or 2, wherein the first film is formed on the first surface, and light emission is emitted from the phosphor on the slope. A reflective film that reflects light was formed.
According to a fourth aspect of the present invention, in the phosphor device according to any one of the first to third aspects, the first film includes a dichroic film.

The invention corresponding to claim 5 is the phosphor device corresponding to any one of claims 1 to 4, wherein the second film includes a dichroic film.
The invention corresponding to claim 6 is the phosphor device according to any one of claims 1 to 5, wherein the pyramid has a quadrangular pyramid shape, a hexagonal pyramid shape, a quadrangular frustum shape, or a conical shape. It is characterized by including.
The invention corresponding to claim 7 is the phosphor device corresponding to any one of claims 1 to 6, wherein the light-transmitting inorganic material containing the phosphor is sintered to form the cone. The invention corresponding to claim 8 is the phosphor device according to any one of claims 1 to 7, wherein the second surface has a wavelength of the excitation light and the fluorescence. An antireflection film for preventing reflection of light having a wavelength other than the wavelength of light is formed.
The invention corresponding to claim 9 is the phosphor device corresponding to claim 8, wherein the antireflection layer is formed of an antireflection film, or has an unevenness having a pitch smaller than the wavelength length in the visible light region. It is formed in a shape.

The invention corresponding to claim 10 is characterized in that a plurality of phosphor devices corresponding to any one of claims 1 to 9 are arranged.
The invention corresponding to claim 11 is the phosphor device corresponding to claim 10, wherein the plurality of phosphor devices are arranged in a grid pattern.
The invention corresponding to claim 12 is the phosphor device corresponding to claim 10 or 11, wherein the plurality of phosphor devices are integrally formed with the second surfaces arranged on the same plane. It is characterized by being.
The invention corresponding to claim 13 is the phosphor device corresponding to claim 10, 11 or 12, characterized in that the plurality of phosphor devices are arranged within an irradiation range of the excitation light.

The invention corresponding to claim 14 is the phosphor device according to any one of claims 1 to 13, an excitation light source that outputs excitation light, and the excitation light output from the excitation light source is the fluorescence. An irradiation optical system that irradiates the first surface of the body device; and a condensing optical system that condenses the emitted light emitted from the second surface of the phosphor device and extracts it as illumination light. This is a lighting device.
The invention corresponding to claim 15 has the illumination device corresponding to claim 14 and a projection optical system that projects light of each color including the illumination light output from the illumination device as a color image. Projector apparatus.

  1: phosphor device, 2: translucent inorganic material (inorganic binder), 3: phosphor, 4-1 to 4-4: side surface, 4-5: first surface, 4-6: second surface 5: Dichroic film, 6: Excitation light reflecting dichroic mirror, 10-1 to 10-4: Reflecting film, 20: Antireflection film, 30: Illuminating device, 31: Semiconductor laser, 32: Collimator lens, 33: Condensing Optical system, 50: phosphor device, 60: projector device, 61: CPU, 62: operation unit, 63: main memory, 64: program memory, 65: system bus, 66: input unit, 67: image conversion unit, 68 : Projection processing unit, 69: audio processing unit, 70: light source unit, 71: micromirror element, 72: mirror, 73: projection lens unit, 74: speaker unit.

Claims (11)

  The first bottom surface having a frustum shape containing at least a phosphor and having a small area among the two bottom surfaces of the frustum shape, and a part of the slope adjacent to the first bottom surface, Forming a first film that transmits excitation light from the outside for exciting the phosphor and reflects the emitted light emitted from the phosphor toward the second bottom surface having the larger area among the two bottom surfaces. A plurality of phosphor devices that transmit the emitted light through the second bottom surface, and the plurality of phosphor devices are integrated with the second bottom surfaces arranged on the same plane. A phosphor device, characterized in that it is formed.   The phosphor device according to claim 1, wherein a second film that reflects the excitation light and transmits the emitted light is formed on the second bottom surface. The first film is formed on the first bottom surface;
A reflective film that reflects the emitted light emitted from the phosphor is formed on the slope.
The phosphor device according to claim 1 or 2, characterized in that   The phosphor device according to claim 1, wherein the first film includes a dichroic film.   The phosphor device according to claim 2, wherein the second film includes a dichroic film.   The phosphor device according to any one of claims 1 to 5, wherein the frustum shape includes a quadrangular frustum shape, a hexagonal frustum shape, or a frustum shape. Furthermore , it has a translucent inorganic material ,
Phosphor device of any one of claims 1 to 6, wherein a sintered body der Rukoto said phosphor and said translucent inorganic material is formed by sintering.   The phosphor device according to claim 1, wherein the plurality of phosphor devices are arranged in a lattice pattern.   The phosphor device according to any one of claims 1 to 8, wherein the plurality of phosphor devices are arranged within an irradiation range of the excitation light. The phosphor device according to any one of claims 1 to 9,
An excitation light source that outputs excitation light;
An optical system for irradiating the first bottom surface of the phosphor device with the excitation light output from the excitation light source;
A condensing optical system that condenses the emitted light emitted from the second bottom surface of the phosphor device and extracts it as illumination light;
An illumination device comprising: A lighting device according to claim 10;
A projection optical system for projecting a color image using light of each color including the illumination light output from the illumination device;
A projector apparatus comprising:

Images