JP2002084002A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain high luminance light by outputting well-balanced mixed lights as parallel lights from an output surface. SOLUTION: A light emitting surface 4 of a semiconductor light emitting element 3 is mounted on the direction opposite to an output surface 5 of a light source device 1. Light is outputted in the direction opposite to the output surface 5. The light is reflected on a reflecting surface 6 which is constituted in arcuately recessed form and positioned opposite to the output surface 5. Wavelength converting part 7 is disposed between the light emitting surface 4 and the reflecting surface 6. A light subjected to wavelength conversion by the wavelength converting part 7 and the original light are present. Lights wherein the lights are mixed are outputted in parallel from the output surface 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor light emitting device having a light emitting surface mounted thereon in a direction opposite to a light emitting surface of a light source device and emitting light opposite to the light emitting surface. The light is reflected by the reflection surface located, part of the light is emitted from the emission surface, and part of the light is wavelength-converted by the wavelength converter provided between the light emission surface (emission surface) and the reflection surface. The present invention relates to a light source device capable of converting the wavelength of light reflected by a reflecting surface, emitting the light, and emitting mixed parallel rays from the emitting surface.

[0002]

2. Description of the Related Art Conventional light source devices are generally of a shell type or the like, and when used for a display or the like, semiconductor light emitting elements are simply called red (Red), blue (Blue) and green (Green). Three semiconductor light emitting devices of RBG were used, the semiconductor light emitting device was coated with a wavelength conversion material (fluorescent material) to obtain white light, or coated with a transparent resin mixed with a wavelength conversion material (fluorescent material). Light source devices are known.

Further, in order to obtain another luminescent color from the luminescent color of the semiconductor light emitting element itself, as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-99345, a semiconductor luminescent device is provided on the bottom of a lead frame formed in a cup shape. 2. Description of the Related Art A light emitting diode that mounts an element and surrounds the inside of a cup with a resin containing a fluorescent substance that converts the emission wavelength of the semiconductor light emitting element to another wavelength to obtain a different emission color is known.

Similarly, in order to convert the emission wavelength of a semiconductor light emitting device to another wavelength to obtain a white light emission color with an LED lamp alone, a blue light emitting semiconductor light emitting device or the like is made of a resin containing a wavelength conversion material. There is also known a method of enclosing the lamp as a whole.

[0005]

Conventional light source devices are generally of a bombshell type or the like, and when white light is to be obtained, the semiconductor light-emitting elements are simply illuminated in red (Red) or blue (Blue).
e) Three semiconductor light-emitting elements of so-called RBG of green and green are used, a semiconductor light-emitting element of blue light emission is covered with a wavelength conversion material (fluorescent material), or a wavelength conversion material (fluorescent material) is mixed. Since a blue light emitting semiconductor light emitting element is covered with a transparent resin or the like, a lamp using three red, blue and green light emitting semiconductor light emitting elements is used as one unit. For this reason, there is a problem that the light source device becomes large. Further, if the wavelength conversion material (fluorescent material) is directly coated on the semiconductor light emitting device, the deterioration of the semiconductor light emitting device or the like may be promoted due to the short wavelength from the semiconductor light emitting device toward a very small ultraviolet band. In addition, since the distance between the semiconductor light emitting element and the wavelength conversion material (fluorescent material) is short, there is a problem that wavelength conversion varies.

Further, in order to obtain another emission color from the emission color of the semiconductor light emitting element itself, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-99345, a semiconductor light emitting device is provided on a bottom formed in a cup-like shape of a lead frame. In a light-emitting diode in which a device is mounted and surrounded by a resin containing a fluorescent substance for converting the emission wavelength of the semiconductor light-emitting device into another wavelength inside the cup to obtain different emission colors, a semiconductor light-emitting device and a wavelength conversion material (fluorescent However, there is a problem that the wavelength conversion varies due to the short distance to the material.

Similarly, in order to convert the emission wavelength of the semiconductor light emitting element to another wavelength to obtain a white light emission color with the LED lamp alone, a blue light emitting semiconductor light emitting element or the like is made of a resin containing a wavelength conversion material. The method of enclosing the lamp in the shape of a lamp as a whole increases the amount of the wavelength conversion material used, and has problems in the stability of the dispersion distribution of the wavelength conversion material and the decrease in luminance.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a light-emitting surface of a semiconductor light-emitting element placed in a direction opposite to a light-emitting surface of a light source device to emit light opposite to the light-emitting surface. The light is reflected by a reflecting surface positioned opposite to the arc-shaped emitting surface, a part of the light is emitted from the emitting surface as it is, and a part is converted by a wavelength converter provided between the light emitting surface (emitting surface) and the reflecting surface. Provided is a light source device capable of reflecting wavelength-converted light on a reflecting surface and emitting the light, or converting the wavelength of light reflected on the reflecting surface to emit the light and emitting mixed parallel rays from the emitting surface. It is in.

[0009]

According to a first aspect of the present invention, there is provided a light source device in which a light emitting surface of a semiconductor light emitting element is arranged in a direction opposite to a light emitting surface for emitting light from the light source device and in parallel with the light emitting surface. Position, the reflection surface located opposite to the emission surface is formed into an arcuate concave shape, and a wavelength conversion unit is provided between the reflection surface and the back surface of the emission surface or between the reflection surface and the light emission surface, and from the light emission surface. It is characterized in that the emitted light emits monochromatic light that is parallel or convergent on the reflecting surface and monochromatic light that has been wavelength-converted by the wavelength converter.

[0010] In the light source device according to the first aspect, the light emitting surface of the semiconductor light emitting element is located in a direction opposite to and parallel to the emission surface for emitting light from the light source device, and has a reflection surface located opposite to the emission surface. In addition to the arcuate concave shape, a wavelength converter is provided between the reflection surface and the back surface of the emission surface or between the reflection surface and the light emission surface, and the light emitted from the light emission surface is parallel or condensed by the reflection surface. Since the monochromatic light and the monochromatic light whose wavelength has been converted by the wavelength converter are emitted, it is possible to obtain a mixed color light in which the rays from the emission surface are parallel rays and are in harmony.

The light source device according to the second aspect is characterized in that the reflecting surface has a mirror-like shape, a fine convex-concave shape, or an arc-shaped convex shape of a hybrid lens shape, and a reflecting material is provided on the surface portion side.

[0012] In the light source device according to the second aspect, the reflecting surface is formed in a mirror-like shape, a fine concave-convex shape, or an arc-like convex shape of a hybrid lens shape, and the reflecting material is provided on the surface portion side.
The light emitted from the semiconductor light emitting element can be effectively reflected without waste, and can be brightly projected far from the emission surface.

Further, the light source device according to the third aspect is characterized in that the light emitting surface has a mirror-like or lattice-like projection, a fine uneven surface or a Fresnel lens shape.

According to the third aspect of the present invention, since the light emitting surface has a mirror-like or grid-like projection, a finely concave or convex shape, or a Fresnel lens-like shape, the light from the reflecting surface can be radiated farther, or the wavelength can be increased. The monochromatic light whose wavelength has been converted by the conversion unit and the monochromatic light that is not converted can be efficiently mixed, and the luminance can be made uniform.

According to a fourth aspect of the present invention, in the light source device, the wavelength conversion portion is made of an yttrium-aluminum-garnet-based material, and the material is uniformly provided in a dot shape having a small area, or a peripheral portion of the emission surface. , A large number of dots are provided in a portion opposed to.

According to a fourth aspect of the present invention, in the light source device, the wavelength conversion portion is made of an yttrium-aluminum-garnet-based material, and the material is uniformly provided in a dot shape having a fine area, or faces the periphery of the emission surface. Since a large number of dots are provided in the portion where the light is mixed, it is possible to uniformly emit mixed color light having high luminance.

Further, in the light source device according to the fifth aspect, the reflecting material adhered to the reflecting surface is made of a metal material having a high reflectivity or a transparent resin material having a small refractive index provided in an arcuate concave portion. Features.

In the light source device according to the fifth aspect, since the reflecting material is made of a metal material having a high reflectance applied to the reflecting surface or a transparent resin material having a low refractive index provided in the arc-shaped concave portion, the semiconductor light emitting device is provided. Light rays from the light emitting surface of the element can be efficiently reflected by the reflecting surface.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that, in the present invention, the light emitting surface of the semiconductor light emitting element is placed in a direction opposite to the light emitting surface of the light source device, and an arc-shaped reflecting surface is provided at a portion facing the light emitting surface, and the light emitting surface and the reflecting surface are interposed. The present invention provides a light source device that is provided with a wavelength conversion section to obtain a monochromatic emission color and emits uniform and bright parallel light from an emission surface.

FIG. 1A is a perspective view showing the appearance of a light source device according to the present invention, FIG. 1B is a sectional view of the light source device, and FIG.
Is a sectional view showing another example of the light source device according to the present invention, and FIGS.
FIG. 6 is a partial cross-sectional view showing another example of the light source device according to the present invention, and FIG. 7 is a perspective view of a collective light source device unitized by using a plurality of light source devices according to the present invention.

As shown in FIGS. 1 (a) and 1 (b), a light source device 1 according to the present invention has a cylindrical appearance, and includes a mold case 2, a semiconductor light emitting element 3, a semiconductor light emitting element light emitting surface 4, and an emission surface. It has a surface 5, a reflection surface 6, a wavelength converter 7, a lead wire 8, and a lead terminal 9. Although the illustrated light source device 1 of this example has a cylindrical appearance, it may have another shape such as a rectangular shape.

The mold case 2 is made of an insulating material such as a liquid crystal polymer made of modified polyamide, polybutylene terephthalate, nylon 46, aromatic polyester, or the like. The mixture containing white powder is formed by injection molding by heating and applying pressure.

The light source device 1 is provided in the mold case 2.
An arc-shaped concave opening is formed in the direction from the emission surface 5 that is the final emission light of the lead terminal 9 to a certain direction, and the surface of the arc-shaped concave opening forms the reflection surface 6.

The semiconductor light emitting element 3 is made of InGaAlP or IGa.
An nGaAlN or InGaN-based semiconductor light emitting device or the like is used. In particular, if an InGaAlN or InGaN-based semiconductor light emitting device or the like is used as the semiconductor light emitting device 3,
A blue light emission color is obtained.

In the semiconductor light emitting device 3, the light emitting surface 4 of the chip of the device is placed (rear side) in the direction of the reflecting surface 6 opposite to the light emitting surface 5 of the mold case 2 in parallel with the light emitting surface 5. The lead wire 8 is electrically connected to a lead terminal 9 located behind the light source device 1.

The light exit surface 5 is a reflection surface 6 of the mold case 2.
A vertical end surface on the side, a mirror surface shape as shown in FIG. 3, a fine uneven surface shape 5a as shown in FIG. 4, a Fresnel lens shape shape 5c as shown in FIG. 5, a grating as shown in FIG. A projection 5b is provided. For example, as shown in FIG. 5, the light from the light emitting surface 4 of the semiconductor light emitting element 3 is reflected by the reflecting surface 6, and the light traveling in the direction of the light emitting surface 5 and the light from the light emitting surface 4 are converted by the wavelength converter 7. The wavelength-converted light is reflected on the reflection surface 6.
The light reflected from the light emitting surface 4 and traveling in the direction of the emitting surface 5 and the light from the light emitting surface 4 reflected by the reflecting surface 6 and the light wavelength-converted by the wavelength converter 7 while traveling in the direction of the emitting surface 5 are mirror-like. The light can be emitted by the emission surface 5 as it is.

Similarly, by making the exit surface 5 a lattice-like projection or a fine uneven surface, the lens effect is utilized at each part of the lattice-like projection or the fine uneven surface while preventing the entire light beam from spreading. The luminous flux can reach far.

Further, similarly, by forming the exit surface 5 in the shape of a Fresnel lens, it is possible to make the entire light beam reach parallel and far.

The reflection surface 6 is provided on the light exit surface 5 of the mold case 2.
4 is formed into an arcuate concave shape at a position opposite to that of FIG.
Alternatively, it has a mirror-like shape as shown in FIG. 6, a finely concave-convex shape 6b as shown in FIG. 5, or a hybrid lens-shaped arc-shaped protrusion 6a as shown in FIG. Although not shown, for example, Al, C having a high reflectance
A transparent resin material having a small refractive index (for example, a refractive index of about n = 1.5 (specifically, n = 1.547, 1.5
03), an epoxy resin or an acrylic resin having a refractive index of about n = 1.7). Thereby, the light from the semiconductor light emitting element 3 is efficiently reflected in the direction of the emission surface 5 and, to a certain extent, is scattered by the fine convex and concave shape or the convex shape of the hybrid lens to increase the probability of hitting the wavelength conversion unit 7. In addition,
Acrylic resin (refractive index n = about 1.7) and epoxy resin (refractive index n =
When 1.503) is used, the difference between the two angles is about 5.6 degrees.

The wavelength conversion section 7 is made of an inorganic fluorescent pigment, an organic fluorescent dye, or the like. These fluorescent materials and the like are printed on a colorless and transparent sheet in a dot shape (lattice shape) as shown in FIG. Alternatively, a material obtained by mixing and dispersing a colorless and transparent epoxy resin or silicone resin as shown in FIG. 4 between the light emitting surface 4 of the semiconductor light emitting element 3 and the reflecting surface 6 or the light emitting surface 5 of the light source device 1
Is provided between the rear side surface and the reflection surface 6. Further, as shown in FIG. 2, the wavelength converter 7 may be provided between the light emitting surface 5 and the reflecting surface 6 and between the light emitting surface 4 and the light emitting surface 5 of the semiconductor light emitting element 3. .

If the wavelength conversion section 7 is provided with a uniform dot shape having a fine area, it is possible to eliminate color variations. In addition, the wavelength converter 7 may be provided with a large number of the dot shapes in a portion facing the peripheral portion of the emission surface 5. In this case, since the distance between the reflection surface 6 and the emission surface 5 becomes closer to the periphery of the emission surface 5, there is strong light energy and reflected light (reflection surface) outside the wavelength converter 7. (Because this light leaks from the lateral direction of the LED (for example, blue light)), the light at the peripheral portion immediately before the emission surface 5 can be made more yellowish than others, and finally can be harmonized.

The wavelength conversion section 7 converts the light emission color of the semiconductor light emitting element 3 into another different color, and converts the light emitted from the green light emitting semiconductor light emitting element 3 into a wavelength conversion section using a red fluorescent pigment or a red fluorescent dye. When projected on 7, yellow light is obtained.

Further, when the light from the blue light emitting semiconductor light emitting element 3 is projected on the wavelength conversion section 7 using a green fluorescent pigment or a green fluorescent dye, blue-green light is obtained.

The fluorescent pigment constituting the wavelength conversion section 7 is
For example, for a red fluorescent pigment, Y _TwoO_Three: Eu or Y
(P, V) O_Four: Zn for green fluorescent pigments such as Eu_TwoSi
O_Four: Mn, etc., and CaSiO for the orange fluorescent pigment_Three: P
b, Mn or Y_ThreeAl_FiveO₁₂ A system or the like is used.

Further, the wavelength converter 7 is excited by the absorption of light emitted from the semiconductor light emitting element 3 or the like, transitions from a ground state having a low energy level to an excited state having a high energy level, and returns to the ground state. A substance that emits light by emitting electron energy without changing it into heat energy such as vibration or rotation. In general, the semiconductor light emitting device 3 is used in accordance with Stokes' law.
In the excitation process, light emission whose emission wavelength is longer than that of the wavelength conversion material and two-step electronic excitation are included in the excitation process, and the emission wavelength of the wavelength conversion material is smaller than that of the anti-Stokes semiconductor light emitting element 3. Shorter luminescence is included.

The wavelength conversion section 7 has a mixing ratio of a fluorescent material and a printing (ink) resin for printing on a colorless and transparent sheet in a dot shape (lattice shape), and a fluorescent material and a colorless and transparent epoxy. The chromaticity diagram or the like is obtained by mixing the original color tone of the semiconductor light emitting element 3 transmitted through the portion where no fluorescent material is present and the color tone converted by the fluorescent material of the wavelength conversion unit 7 depending on the ratio of mixing and dispersion in the resin or silicone resin. Are obtained.

For example, when light from the blue light emitting semiconductor light emitting element 3 is projected onto the wavelength conversion section 7 in which an orange fluorescent pigment or an orange fluorescent dye is mixed, white light is obtained by mixing the blue light and the orange light. In this case, if the amount of the fluorescent material is large, light with a deep orange color tone is obtained, and if the amount of the fluorescent material is small, light with a deep blue color tone is obtained.

The wavelength conversion section 7 may set the area ratio between the conversion material and the non-conversion section (colorless) to 0.4 to 0.7: 1 in consideration of the case where the color conversion efficiency is poor. it can. Simply, 50:50 (blue 50: yellow 50) may be used. However, this ratio means that a conversion material having a concentration of 100% is used.
Since the conversion material of% does not transmit light, it is applied thinly by, for example, printing.

The lead wire 8 is made of a metal wire having good conductivity such as a metal, and electrically connects an anode electrode and a cathode electrode of the semiconductor light emitting element 3 and the like by a bonder. Further, the lead frame may be directly electrically connected to the lead terminal 9 using a thin lead frame for the same purpose.

The lead terminal 9 is made of a conductive or elastic copper alloy material such as phosphor bronze or aluminum.
It is electrically connected to the lead wire 8. Note that the semiconductor light emitting element 3 may be provided by die bonding on a lead frame, and the lead terminal 9 may be directly taken out of the mold case 2 from the lead frame.

Incidentally, the space of the opening of the arc-shaped concave portion provided in the mold case 2 can be filled with an epoxy resin or a silicone resin to reduce light loss.

Further, only the wavelength conversion section 7 and the semiconductor light emitting element 3 are fixed with an epoxy resin or a silicone resin.
In the case of an air gap type in which the space of the arc-shaped concave opening is not filled with resin or the like, the inside of the arc-shaped concave opening is filled with vacuum, air, gas, or the like to radiate heat or the semiconductor light emitting element 3.
Can be prevented from deteriorating.

Further, as shown in FIG. 7, it is possible to provide a light source having a large light amount as if a large number of light source devices 1 were assembled.
In this case, the individual light source devices 1 are inserted into the mold case 2 in one case 10, and an electrical connection is made inside the case 10.

As another configuration, a large light source device 1 is formed from the beginning with a large number of arcuate concave spaces formed in a mold case 2, and the reflecting surfaces 6 are formed into the respective arcuate concave shapes, and the wavelengths are formed into the respective arcuate concave shapes. The conversion unit 7 and the semiconductor light emitting element 3 are provided to make electrical connection inside the case 10.

In this case, different semiconductor light emitting elements 3 and different wavelength converters 7 each having an arcuate concave shape are used,
By using various fluorescent materials or the like only for the wavelength conversion section 7, it is possible to cope with multicolor.

[0046]

An embodiment of the light source device according to the present invention will be described. (Y, Gd) ₃ (Al, Ga) which is a fluorescent pigment based on YAG (yttrium aluminum garnet)
₅ O _12: changing _{(Y, Gd) 3 (Al} , Ga) 5 O 12 and various atomic weight ratio of Ce to Ce, the ratio is 1: when the 4 and further the average particle size of the fluorescent pigment to about 8μm An arc-shaped concave type in which a wavelength conversion portion 7 in which a wavelength conversion material mixed with a colorless and transparent epoxy resin adjusted to a weight ratio of 1: 1 and printed on a colorless and transparent sheet in a dot shape (lattice shape) is provided in a mold case 2. Between the reflecting surface 6 and the blue light emitting semiconductor light emitting element 3 placed parallel to the emitting surface 5 behind the emitting surface 5 to produce a light source device. As a result, a part of the blue light emitted from the semiconductor light emitting element 3 hits the fluorescent material of the wavelength conversion unit 7 and the light converted to orange and the light of the blue light are reflected by the reflecting surface 6 and again emitted blue light. A part of the color hits the fluorescent material of the wavelength conversion part 7 and the light converted to orange and the light of the blue emission color as it is are reflected on the reflection surface 6 and the emission surface 5.
And white light could be obtained.

The blue light emitting semiconductor light emitting device used in this example was E1C00-1BA01 manufactured by Toyoda Gosei Co., Ltd.

As described above, in the light source device according to the present invention, the light emitting surface 4 of the semiconductor light emitting element 3 is placed in the direction opposite to the light emitting surface 5 of the light source device 1, and the light is emitted opposite to the light emitting surface 5. Light is reflected by a reflecting surface 6 located opposite to the arc-shaped concave emitting surface 5 and a wavelength conversion portion 7 is provided between the light emitting surface 4 and the reflecting surface 6, and a part of the light is converted to the light as it is. Can emit light mixed with the light whose wavelength has been converted by the wavelength conversion unit 7 from the emission surface 5 in parallel.

[0049]

As described above, in the light source device according to the first aspect, the light emitting surface of the semiconductor light emitting element is located in a direction opposite to and parallel to the light emitting surface for emitting light from the light source device. The reflecting surface located on the opposite side is formed into an arcuate concave shape, and a wavelength converter is provided between the reflecting surface and the back side of the emitting surface or between the reflecting surface and the emitting surface, and the light emitted from the emitting surface is reflected by the reflecting surface. Since the monochromatic light having the parallel or condensing properties and the monochromatic light whose wavelength has been converted by the wavelength conversion section are emitted, it is possible to obtain a mixed color light in which the light from the emission surface is parallel and harmonious, and High-luminance light can be obtained together with light of each color.

Further, in the light source device according to the second aspect, since the reflecting surface is formed in a mirror-like shape, a fine concave-convex shape or an arc-like convex shape of a hybrid lens shape, and the reflecting material is provided on the surface side, the semiconductor light-emitting device can be used. The light emitted from the light-emitting device can be effectively reflected without waste, and can be brightly projected far from the emission surface. In addition, the brightness can be increased with a small number of semiconductor light-emitting elements, and energy saving can be achieved.

Further, in the light source device according to the third aspect, since the light emitting surface has a mirror-like or lattice-like protrusion, a finely concave-convex surface or a Fresnel lens-like shape, the light from the reflecting surface can be radiated farther. In addition, the monochromatic light whose wavelength has been converted by the wavelength conversion unit and the monochromatic light that has not been converted can be efficiently mixed, the luminance can be made uniform, and excellent cost performance such as reduction in power consumption can be achieved.

According to a fourth aspect of the present invention, in the light source device, the wavelength conversion portion is made of an yttrium-aluminum-garnet-based material, and the material is provided uniformly in a dot shape having a small area, or a portion around the emission surface. Since a large number of dots are provided in a portion opposed to the above, mixed color light with high luminance can be uniformly emitted, and white light can be obtained with a small number of semiconductor light emitting elements.

Further, in the light source device according to the fifth aspect, since the reflecting material is made of a metal material having a high reflectance applied to the reflecting surface or a transparent resin material having a low refractive index provided in the arc-shaped concave portion, Since the light from the light emitting surface of the semiconductor light emitting device can be efficiently reflected by the reflecting surface, and the luminance can be increased with a small number of semiconductor light emitting devices.
Can cope with energy saving.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an appearance of a light source device according to the present invention. FIG. 1B is a sectional view of the light source device.

FIG. 2 is a cross-sectional view showing another example of the light source device according to the present invention.

FIG. 3 is a partial sectional view showing another example of the light source device according to the present invention.

FIG. 4 is a partial sectional view showing another example of the light source device according to the present invention.

FIG. 5 is a partial sectional view showing another example of the light source device according to the present invention.

FIG. 6 is a partial sectional view showing another example of the light source device according to the present invention.

FIG. 7 is a perspective view of a collective light source device unitized by using a plurality of light source devices according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source device, 2 ... Mold case, 3 ... Semiconductor light emitting element, 4 ... Light emitting surface, 5 ... Outgoing surface, 5a ...
b: Lattice projection, 5c: Fresnel lens shape, 6: Reflection surface, 6a: Arc-shaped convex of hybrid lens shape, 6b ...
Fine uneven surface shape, 7: wavelength converter, 8: lead wire, 9
... lead terminals, 10 ... cases.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshimichi Nakamura 6-22-6 Nagayama, Tama-shi, Tokyo F-term (reference) in Nippon Denyo Co., Ltd. 5F041 AA11 DA16 DA25 DA26 DA43 DA56 DA58 EE17 EE23 EE25

Claims (5)

[Claims] 1. A light source device comprising: a semiconductor light emitting element provided on a lead frame; and a semiconductor light emitting element coated with a resin and molded and molded. The light exits from the device in a direction opposite to the light exit surface and in parallel with the light exit surface, and the reflection surface located opposite to the light exit surface is formed into an arcuate concave shape, and the reflection surface and the back side surface of the light exit surface. A wavelength converter is provided between or between the reflective surface and the light emitting surface, and the light emitted from the light emitting surface is converted in wavelength by the parallel or condensing monochromatic light and the wavelength converter on the reflective surface. A light source device for emitting monochromatic light. 2. The reflector according to claim 1, wherein the reflecting surface has a mirror-like shape, a finely convex-concave surface shape, or a hybrid lens-shaped arc-shaped convexity, and a reflective material is provided on a surface side.
The light source device according to claim 1. 3. The light source device according to claim 1, wherein the emission surface has a shape of a mirror surface, a grid-like protrusion, a fine uneven surface, or a Fresnel lens. 4. The wavelength conversion section is made of an yttrium-aluminum-garnet-based material, and the material is uniformly provided in a dot shape having a fine area, or the wavelength conversion section is provided at a portion facing a peripheral portion of the emission surface. The light source device according to claim 1, wherein a large number of dots are provided. 5. The reflection material is made of a metal material having a high reflectance applied to the reflection surface or a transparent resin material having a low refractive index provided on the arc-shaped concave portion. The light source device according to any one of claims 2 to 4.