JPWO2017208334A1 - Light source device and electronic device using the same - Google Patents

Abstract

  Provided are a light source device suitable as a light source that requires high color rendering properties, and an electronic device using the light source device. From a first solid-state light source that generates light of a predetermined wavelength and a predetermined wavelength of light that is generated by the first solid-state light source (blue LD) by entering light from the first solid-state light source as excitation light A phosphor part including a fluorescent material that emits long-wavelength fluorescence, and a second solid-state light source (red) that generates light having a longer wavelength than the light generated by the first solid-state light source and enters the phosphor part. LD), and the light generated by the second solid-state light source has a longer wavelength than the fluorescence emitted by the phosphor part, and the phosphor part, in addition to the phosphor material, A light source device including particles that scatter light generated by the first and second solid-state light sources.

Description

  The present invention relates to a light source device using a solid-state light source, and more particularly to a compact and high-intensity light source device used for a headlight of an automobile, a light source of a video projection device, and the like and an electronic device using the light source device.

  In recent years, long-life, small-sized and high-intensity light source devices using a solid-state light source composed of a laser diode have been widely put into practical use. For example, as already known in Patent Document 1 below, There has been proposed a light source device that obtains light of a desired wavelength band by causing a phosphor to emit light by the excitation light.

JP 2012-1114040 A

  In the above prior art, in order to improve color reproducibility including color rendering, the phosphor part that generates fluorescence by excitation light from a solid-state light source is composed of a plurality of types of phosphor materials having different fluorescence lifetimes. Thus, obtaining a light source with high efficiency and high brightness is described.

  However, in the light source device according to the above-described prior art, when obtaining light having a long wavelength that is farther away from the excitation light from the solid-state light source, Stokes shift loss due to wavelength conversion occurs. Therefore, there is a problem that an efficient light source device having sufficient color reproducibility including color rendering properties cannot be realized.

  It is an object of the present invention to provide a light source device suitable as a light source for automobile headlamps and video projection devices that require high color rendering properties, and an electronic device using the light source device.

  In order to achieve the above object, according to the present invention, a first solid-state light source that generates light of a predetermined wavelength, and light from the first solid-state light source is incident as excitation light and the first solid-state light source is incident. A phosphor portion including a fluorescent material that emits fluorescence having a wavelength longer than a predetermined wavelength of light generated by a solid light source (blue LD); and light having a wavelength longer than that of light generated by the first solid light source. A second solid light source (red LD) incident on the phosphor part, and the light generated by the second solid light source has a longer wavelength than the fluorescence emitted by the phosphor part, And the said fluorescent substance part is provided with the light source device which contains the particle | grains which scatter the light which the said 1st and 2nd solid light source generate | occur | produces in addition to the said fluorescent material.

  In addition, according to the present invention, an automotive headlamp or a video projection device is provided as an electronic device using the electronic device.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide a light source device suitable as light sources, such as a headlight of a motor vehicle and a video projector which require high color rendering properties, and also an electronic device using the light source device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an entire configuration of a light source device according to an embodiment of the present invention, which is applied as an automobile headlamp (Example 1). It is the sectional side view of the light source device which becomes the said Example 1, and its partially expanded sectional view. It is a figure which shows the result of having evaluated the spectrum of the light obtained by the general system for obtaining the conventional pseudo white. It is a figure which shows the result of having evaluated the spectrum of the light obtained by the light source device which becomes this invention. It is a block diagram which shows an example of the structure of the light distribution control of the light source device applied as the headlamp of the said motor vehicle. (Example 2) It is a sectional side view which shows the whole structure of the video projector which applied the light source device of this invention as a light source. It is a sectional side view which shows the modification of the light source device of the said Example 2.

  Hereinafter, embodiments of the present invention will be described, but prior to that, color rendering, which is an important feature of the present invention, will be described.

<About color rendering>
In general, the color of an object tends to be thought of as a specific color that is unique to the object, but it looks different when illuminated with light of a different composition (spectral distribution). The property of the light source on the color is called color rendering. In particular, in a light source device that obtains white light by exciting yellow phosphors with excitation light from a blue laser, such as a solid light source that is currently commonly used as a headlight (headlight) of an automobile, The light emission component in the red region is insufficient, so it is difficult to distinguish warning characters and signs that are generally displayed in red during night driving, and therefore there are problems such as not being able to obtain a sufficient warning effect. Arise. Also, in a system that determines and records the driving state of the vehicle based on images outside the vehicle, or issues a warning to the driver, if the light from the headlamp does not have sufficient color rendering May cause inconveniences such as failure to identify warning characters and signs and warning to the driver.

  Such color rendering is one of the most important characteristics of the illumination light source. In order to quantitatively evaluate the color rendering of the light source, in the present invention, JIS (Japanese Industrial Standards) and CIE (Commission) are used. Internationale de l´Eclairage).

Example 1
First, FIG. 1A shows an example in which the light source device 100 according to the present invention is applied as a headlight 210 of an automobile 200 as an example. FIG. 1 (B) is a partially developed perspective view showing a part of one headlamp in an expanded state, and FIG. 2 (A) is a side view thereof. In the figure, reference numeral 10 denotes a blue laser diode (LD) which is a solid light emitting element for excitation that constitutes the light source device 100 (hereinafter also referred to as “excitation laser”), and reference numeral 20 denotes the color rendering described above. This is a solid-state light-emitting element that is a light source for enhancing the performance, and shows a color rendering light source (hereinafter also referred to as “color rendering laser”) composed of a red laser diode (LD). As is clear from the drawing, these solid-state light emitting elements 10 and 20 are arranged on both sides of the dichroic mirror 30 as a boundary surface, and the light from the excitation laser 10 passes through the dichroic mirror 30. The light from the other color rendering laser 20 is reflected by the dichroic mirror 30 and enters the light conversion unit 50.

  In the first embodiment, the light source device 100 is configured such that the light generated from both the solid light emitting elements 10 and 20 is separated from the phosphors and the scattering particles constituting the light conversion unit 50 by the optical elements such as the lenses 11 and 21. On the fluorescent / scattering member 51, the light is condensed in a spot (spot) shape and is incident.

  As shown by the dashed arrows in FIG. 2 (A), the laser is emitted from the fluorescence / scattering member 51 constituting the light conversion unit 50 by the incidence (irradiation) of the laser light from both the solid state light emitting devices 10 and 20. Fluorescence converted by the phosphor around the incident (irradiation) point of light, scattered light from the excitation laser, and scattered light from the color rendering laser are generated, and these lights are arranged facing the light conversion unit 50. The light is reflected by the reflecting surface 61 of the mirror (or reflector) 60 and travels in a predetermined direction. In this example, the reflecting surface 61 of the mirror 60 is formed in a so-called parabolic shape, and the reflected light is projected in parallel toward the front of the automobile. Reference numeral 70 in the drawing denotes a lens that is an optical element that constitutes a part of the headlight.

  Subsequently, FIG. 2B shows an enlarged cross section of the fluorescence / scattering member 51 of the light conversion unit 50. As is clear from the figure, the light conversion unit 50 is formed on the surface of the metal substrate 52 constituting the main body, for example, aluminum or copper having high light reflectivity and good thermal conductivity. After mixing and applying the scattering particles, the fluorescent / scattering member 51 is formed by adhering solidified or separately sintered materials by baking or the like.

  By the way, it is generally desirable to use phosphor ceramics as the phosphor layer described above. However, as a result of investigations by the inventors, it is a yellow phosphor that emits light mainly in the yellow wavelength band by irradiation with excitation blue laser light. For example, Y3Al5O12: Ce3 + does not deteriorate its function even in high-temperature processing by ceramization. However, phosphors that are red phosphors necessary for color rendering (color reproducibility), such as CaAlSiN3: Eu2 +, (Ca, Sr) AlSiN3: Eu2 +, Ca2Si5N8: Eu2 +, (Ca, Sr) 2Si5N8: Eu2 + However, there has been a problem that the phosphor is deactivated in the sintering process at a high temperature of 1000 ° C. or higher in the process of ceramization.

  In general, a phosphor has a function of converting excitation light into light having a wavelength longer than the wavelength of the excitation light (for example, a yellow phosphor converts blue excitation light (wavelength = 450 nm) into yellow light). Band (wavelength = 530 to 580 nm). However, when converting to a wavelength band that is significantly different (long) from the wavelength of the excitation light, such as the red band (wavelength = 650 nm), the difference between the excitation light and fluorescence energy (E = hc / λ) increases. The light conversion efficiency decreases.

  Therefore, in the present invention, the light emitting component in the red region necessary for improving the color rendering properties is irradiated from a solid light emitting element (color rendering laser 20) different from the light source (excitation laser 10) that emits the blue laser light for excitation. By using the red laser light for color rendering and the blue laser light for excitation, projection light having excellent color rendering properties can be obtained from the same emission point. In the first embodiment, the color rendering red laser light and the excitation blue laser light are once irradiated onto the fluorescence / scattering member 51 having a light scattering function. At that time, a part of the excitation blue laser light is radiated after being converted into light having a longer wavelength by the yellow phosphor 53, and the color rendering red laser light is emitted mainly by scattering. .

  That is, as clearly shown in FIG. 2B, the fluorescence / scattering member 51 is a yellow phosphor (for example, Y3Al5O12: Ce3 +) that is generally used for converting the blue laser light for excitation into white light. ) 53 and a scattering material 54 made of alumina particles, for example. The particle diameter of the yellow phosphor 53 is larger than the particle diameter of the scattering material 54. According to the fluorescence / scattering member 51 having such a configuration, the light from the excitation light source 10 acts as a fluorescent light-emitting layer, while the light from the solid light source 20 different from the excitation wavelength is scattered. Acts as a plate. As a result, it is possible to achieve uniform illumination light with high color reproducibility without unevenness by mixing light of two types of wavelengths uniformly. In other words, in addition to the excitation solid-state light source 10, a phosphor film (fluorescence / scattering member 51) further comprising a solid-state light source (color rendering laser 20) that generates light having a longer wavelength and a mixture of the phosphor and the scattering material. ) To generate a white light by converting a part of the excitation light into a light having a different wavelength (however, the red color rendering light is insufficient, hereinafter, also referred to as “pseudo white light”), The color reproducibility of the light source is improved by scattering the light from the color rendering laser 20 on the surface thereof and mixing the light emission component in the red region.

  Further, according to the results of various experiments by the inventors, it is preferable that the yellow phosphor 53 constituting the fluorescence / scattering member 51 has a particle size of about 10 μm or more and less than 100 μm, and the scattering material 54. It was found that the alumina particles preferably have a particle size of about 1 μm or more and less than 10 μm.

  Subsequently, the light obtained by the light source device described above will be described in detail below in comparison with the light source device according to the prior art.

  FIG. 3 shows the result of evaluating the spectrum of pseudo white light obtained by a general method, more specifically, the light spectrum obtained by irradiating a yellow phosphor with excitation light from a blue LD to emit light. Show. FIG. 3 (A) is a pie chart (so-called radar chart) showing the distribution of the color rendering index in each component of the test colors 1 to 9 of the obtained light, and FIG. 3 (B) was obtained. The emission spectrum with respect to the wavelength (horizontal axis) of light is shown.

  Here, the components of the above-described test colors 1 to 9 are test colors for color rendering evaluation defined by JIS and CIE shown in Table 1 below. Here, as described above, in a light source device that obtains white light by exciting a yellow phosphor by irradiation of excitation light from a blue LD, it is difficult to express vivid red even when light is applied to a red object. In view of the problem, the test colors 1 to 9 were selected from the test colors 1 to 15 shown in the table and evaluated. In addition to the test colors 1 to 8 for obtaining the average color rendering index, the test color 9 which is “brilliant red” among the test color test colors 9 to 15 for obtaining the special color rendering index is added. Yes.

  As a result, as is apparent from the graph of the figure, it can be seen that the red color component is particularly small in the spectrum itself, so that it is difficult to express vivid red even when light is applied to a red object.

  On the other hand, in FIG. 4, the result of having evaluated the spectrum of the light obtained by the light source device which becomes this invention is shown, FIG. 4 (A) shows in the component of each test color 1-9 of the obtained light. FIG. 4B is a pie chart (so-called radar chart) showing the distribution of the color rendering index, and FIG. 4B shows the emission spectrum with respect to the wavelength of the obtained light (horizontal axis).

  As is clear from these graphs, compared with the general pseudo white laser light source (blue LD + yellow phosphor) shown in FIG. 3, the red light from the color rendering laser 20 is added. It can be seen that by adding a reddish component to white, the color reproducibility of the red object is greatly improved in the color rendering evaluation result.

  In particular, in the present invention, the red light from the color rendering laser 20 is added to the red light, which is largely lacking in a general pseudo white laser light source (blue LD + yellow phosphor), By irradiating the phosphor film (fluorescence / scattering member 51) in which the phosphor and particles are mixed with these lights, a part of the excitation light is converted into light having a longer wavelength (yellow band light). At the same time, the red light is scattered at the same location as the excitation light projection location, thereby improving the color reproducibility of the obtained light efficiently.

<Configuration of light distribution control ECU>
Next, FIG. 5 shows an example of the configuration of an electronic control unit (light distribution control ECU) mounted in the automobile 200 described above. As is apparent from this figure, the light distribution control ECU 40 includes a CPU (central processing unit) 41, a RAM 42 and ROM 43 as storage means, and an input / output device (I / O unit) 44. Then, the light distribution control ECU receives images and light outside the vehicle, including signs and the like, together with information from various information acquisition units and communication units not shown here, via the I / O unit 44. A video signal from the in-vehicle camera 45 to be captured is input, and the headlamp 210 is driven and controlled.

  On the other hand, the headlamp 210 includes a lighting circuit S13 for supplying and controlling the drive current to the excitation light source (blue laser diode (LD)) 10 and a color rendering light source (red laser diode ( LD)) is provided with a lighting circuit T23 for supplying and controlling the drive current to 20. The blue light from the excitation light source 10 and the red light from the color rendering light source 20 are applied to the fluorescence / scattering member of the light conversion unit 50 to become fluorescence and scattered light, and the mirror 60 and the lens 70 described above. Is projected to the front of the automobile 200 via. Further, a so-called chromaticity sensor 211, which is a sensor for detecting the chromaticity of illumination light from the headlamp 210, is provided inside the headlamp (headlight) 210. Similarly, the chromaticity signal from 211 is also input to the light distribution control ECU 40 via the I / O unit 44.

  Then, as the control of the excitation light source 10 and the color rendering light source 20 by the lighting circuit S13 and the lighting circuit T23, the light distribution control ECU 40 turns the color rendering light source 20 on, for example, when the headlamp 210 is turned on. Alternatively, it may be controlled so that it is always turned on, or it may be controlled so that it is turned on when an object requiring color rendering improvement by a color rendering light source such as a sign is recognized by the on-vehicle camera 45 described above. Alternatively, by controlling the chromaticity signal from the chromaticity sensor 211 built in the headlight 210, it is also possible to control so as to compensate for the influence of color misregistration accompanying the change in the output of the light source.

  In addition, when the light source device of the present invention described above is applied particularly as the headlamp 210 of the automobile 200, warning characters and signs displayed in colors including red are displayed even when driving at night. It becomes possible to recognize with natural colors close to the light. Therefore, a sufficient warning effect can be obtained, leading to prevention and reduction of traffic accidents. Even in a system that determines and records the driving state of the vehicle based on images outside the vehicle, or issues a warning to the driver, it is natural to consider the color change during night driving. Expect to work.

  In the above, the use of the light source device of the present invention as an automobile headlamp has been mainly described. However, the present invention is not limited to this, and further, for example, a target such as food lighting. It may be considered to be used as a light source device for illumination that needs to be displayed in a natural color.

(Example 2)
FIG. 6 shows an example in which the light source device of the present invention is used in a so-called projector, which is a video projection device that displays a desired video by modulating and projecting light from the light source. In this figure, the light source device is denoted by reference numeral 100 in the same manner as described above, and other parts constituting the video projection device are denoted by reference numerals 80 and 90.

  In the figure, in the light source device 100, the light emitted from the excitation laser (blue LD) 10 and the color rendering laser (red LD) 20 is dichroic through the condensing lenses 11 and 21, respectively, as described above. After entering the mirror 30 and passing or reflecting through the dichroic mirror 30, the light conversion unit 50 ′ is irradiated in the form of a spot (spot). In the second embodiment, unlike the above, the light conversion unit 50 ′ is similar to the above on part of the surface (outgoing surface) of a highly transparent plate-like member such as glass. In addition, a fluorescent / scattering member 51 ′ including a yellow phosphor 53 and a scattering material made of alumina particles is formed in a spot shape. Therefore, in the light conversion unit 50 ′, the above light is incident from the back surface of the plate-like fluorescence / scattering member 51 ′, and the long-wavelength light is emitted by the yellow phosphor 53 and the scattering material 54 of the fluorescence / scattering member 51 ′. The light is converted / scattered into the light and emitted from the surface. Thereafter, the light is output from the opening 56 of the light source device 100 as parallel light by the lens 55 constituting the collimator optical system.

  Next, reference numeral 80 denotes a main part of a projector that is a video projection device, and shows a so-called video formation unit that modulates light from the light source device 100 to form a desired projection video. As is clear from this figure, the light from the opening 56 of the light source device 100 enters the dichroic mirror 801 via the fly-eye lenses 81a and 81b, the polarizing plate 82, the focusing lens 83, and the like. The blue light (B) is reflected and separated. The light transmitted through the dichroic mirror 801 is further separated by the green light (G) reflected by the dichroic mirror 802. Thereafter, the remaining red light (R) enters the transmissive liquid crystal panel 816 via the focusing lens 811, the mirror 812, the focusing lens 813, the mirror 814, and the focusing lens 815, and the red component of the desired image. And is incident on the combining prism 817.

  On the other hand, the blue light (B) reflected by the dichroic mirror 801 enters a transmissive liquid crystal panel 820 which is a blue image display element via a mirror 818 and a focusing lens 819 to generate a desired image. After the modulation corresponding to the blue component is performed, the light enters the combining prism 817. Similarly, the green light (G) reflected by the dichroic mirror 802 enters the green transmissive liquid crystal panel 822 via the focusing lens 821, and is modulated corresponding to the green component of the desired image. After being performed, the light enters the synthesis prism 817 described above. The combining prism 817 generates a desired image by combining the modulated light from the red liquid crystal panel 816, the blue liquid crystal panel 820, and the green liquid crystal panel 822 described above, and includes a projection optical system 90 (here, a projection lens, a mirror, and the like). The image is displayed by projecting the generated image light onto an image display means such as a screen via a simple block).

  In the video projection device, as described above, the light from the light source device 100 is separated into blue light (B), green light (G), and red light (R), which are the three primary colors, and then modulated to obtain a desired projection. Since the image is formed, the light obtained by the light source device according to the present invention is a color rendering in which a red component is efficiently added compared to a general pseudo white laser light source (blue LD + yellow phosphor). White light with excellent properties can be obtained. As a result, it is possible to obtain a projected image with excellent color reproducibility.

  Furthermore, in FIG. 7, the light source device 10 which is a modification of the said Example 2 is shown. 7A shows a side cross section of the light source device 10, and FIG. 7B shows a developed perspective view of the main part. As is clear from these drawings, in this example, the fluorescent / scattering member 51 ″ constituting the light conversion unit 50 ′ is a surface of a disk-like highly transparent member (for example, glass). As shown in FIG. 2B, a part of the material is coated with a yellow phosphor 53 and a scattering agent material 54 made of alumina particles and then fixed by baking or the like. Further, for example, a rotation shaft of a rotation driving means 95 such as a motor is attached to the central portion of the disk-like fluorescent / scattering member 51 ", and thereby, it rotates at a predetermined number of rotations. This constitutes a so-called fluorescence / scattering wheel.

  According to the light source device 10 having such a configuration, the light emitted from the excitation laser (blue LD) 10 and the color rendering laser (red LD) 20 enters the light conversion unit 50 ′ via the dichroic mirror 30. At this time, the rotation area of the fluorescence / scattering wheel 51 "substantially increases the irradiation area of the excitation laser beam to the phosphor, suppresses the temperature rise of the yellow phosphor 53 due to absorption of the excitation light, and suppresses fluorescence due to temperature quenching. The output decrease is suppressed, and the chromaticity shift due to the change in the color mixture balance with the color rendering laser beam is reduced. In other words, good white light is efficiently obtained.

  In the above example, the transmissive liquid crystal panel is described as an image display element that modulates light into image light of each color. However, the present invention is not limited to this, and for example, a reflective liquid crystal panel or Those skilled in the art will appreciate that similar effects can be obtained by using a video display device such as a DMD (Digital Mirror Device). In the above description, the image projection device that combines the image light after separating and modulating the light from the light source device 10 into the three primary colors has been described in detail. However, the present invention is not limited to this, and It goes without saying that it can also be used as a light source for an image projection apparatus that modulates using one image display element without separating light.

  The planar light source device suitable for use in an electronic apparatus provided with an image display device according to various embodiments of the present invention has been described above. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 100 ... Light source device, 10 ... Solid light emitting element for excitation (blue laser diode), 20 ... Solid light emitting element for color rendering (red laser diode), 30 ... Dichroic mirror, 50, 50 ' ... light conversion section, 51, 51 ', 51 "... fluorescence / scattering member, 53 ... yellow phosphor, 54 ... scattering material (alumina particles), 60 ... mirror (reflector), 210 ... headlight, 80 ... main part of video projection apparatus, 90 ... projection optical system.

Subsequently, FIG. 2B shows an enlarged cross section of the fluorescence / scattering member 51 of the light conversion unit 50. As is apparent from the figure, the light conversion unit 50 is scattered on the surface of the metal substrate 52 that constitutes the main body, for example, aluminum or copper having high light reflectivity and good thermal conductivity. After mixing and applying the particles, the fluorescent / scattering member 51 is formed by adhering solidified or separately sintered materials by firing or the like.

In the figure, in the light source device 100, the light emitted from the excitation laser (blue LD) 10 and the color rendering laser (red LD) 20 is dichroic through the condensing lenses 11 and 21, respectively, as described above. After entering the mirror 30 and passing or reflecting through the dichroic mirror 30, the light conversion unit 50 ′ is irradiated in the form of a spot (spot). In the second embodiment, unlike the above, the light conversion unit 50 ′ is similar to the above on part of the surface (outgoing surface) of a highly transparent plate-like member such as glass. In addition, a fluorescent / scattering member 51 ′ including a yellow phosphor 53 and a scattering material made of alumina particles is formed in a spot shape. Therefore, in the light conversion unit 50 ′, the light enters from the back surface of the plate-like fluorescence / scattering member 51 ′, and is converted into long wavelength light by the yellow phosphor 53 and the scattering material 54 of the fluorescence / scattering member 51 ′. The light is converted / scattered and emitted from the surface. Thereafter, the light is output from the opening 56 of the light source device 100 as parallel light by the lens 55 constituting the collimator optical system.

Furthermore, in FIG. 7, the light source device 10 which is a modification of the said Example 2 is shown. 7A shows a side cross section of the light source device 10, and FIG. 7B shows a developed perspective view of the main part. As can be seen from these figures, in this example, the fluorescent / scattering member 51 ″ constituting the light converting portion 50 ′ is formed on the surface of a disk-like highly transparent member (for example, glass). As shown in FIG. 2B, a part of the material is coated with a material including a yellow phosphor 53 and a scattering material 54 made of alumina particles, and then fixed by baking or the like. Further, for example, a rotation shaft of a rotation driving means 95 such as a motor is attached to the central portion of the disk-like fluorescence / scattering member 51 ″, and thereby rotates at a predetermined number of rotations. This constitutes a so-called fluorescence / scattering wheel.

Claims (11)

A first solid state light source that generates light of a predetermined wavelength;
A phosphor part including a fluorescent material that emits fluorescence having a wavelength longer than a predetermined wavelength of light generated by the first solid light source by making light from the first solid light source incident as excitation light;
A second solid-state light source that generates light having a longer wavelength than the light generated by the first solid-state light source and enters the phosphor portion;
The light generated by the second solid light source has a longer wavelength than the fluorescence emitted by the phosphor portion, and
The phosphor portion includes a light scattering device including particles that scatter light generated by the first and second solid light sources in addition to the fluorescent material. The light source device according to claim 1,
The first solid-state light source is a blue laser;
The light source device, wherein the second solid light source is a red laser. The light source device according to claim 2,
The phosphor portion includes a light emitting device including alumina particles as particles that scatter the light in addition to a yellow phosphor that emits light mainly in a yellow wavelength band by irradiation with excitation blue laser light. The light source device according to claim 3.
The light source device, wherein a particle diameter of the yellow phosphor is larger than a particle diameter of alumina as the scattering particles. The light source device according to claim 4,
The yellow phosphor has a particle size of 10 μm or more and less than 100 μm,
The light source device has a particle diameter of alumina of 1 μm or more and less than 10 μm as the scattering particles. The light source device according to claim 1,
The phosphor portion is a light source device formed on the surface of a metal substrate having a high light reflectance. The light source device according to claim 1,
The phosphor portion is a light source device formed on a surface of a substrate having a high light transmittance. An electronic device using the light source device according to claim 6,
A reflector for irradiating light from the light source device in a predetermined direction is provided, and the phosphor portion of the light source device is arranged with its light irradiation surface facing the reflective surface of the reflector. An electronic device.   An electronic device using the light source device according to claim 8 is an automotive headlamp.   8. An electronic apparatus using the light source device according to claim 7, wherein means for modulating light from the light source device into predetermined video light and projection means for projecting video light modulated by the modulation means An electronic device comprising:   An electronic apparatus using the light source device according to claim 10 is an image projection apparatus.

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