JP2003110146A - Light-emitting device - Google Patents

Light-emitting device

Info

Publication number
JP2003110146A
JP2003110146A JP2002218989A JP2002218989A JP2003110146A JP 2003110146 A JP2003110146 A JP 2003110146A JP 2002218989 A JP2002218989 A JP 2002218989A JP 2002218989 A JP2002218989 A JP 2002218989A JP 2003110146 A JP2003110146 A JP 2003110146A
Authority
JP
Japan
Prior art keywords
light emitting
light
emitting element
emitting device
fluorescent member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002218989A
Other languages
Japanese (ja)
Inventor
Takuma Hashimoto
Hideyoshi Kimura
Tadashi Murakami
Koji Nishioka
Eiji Shiohama
Masaru Sugimoto
Masao Yamaguchi
Ryoji Yokoya
英二 塩濱
昌男 山口
秀吉 木村
勝 杉本
忠史 村上
良二 横谷
拓磨 橋本
浩二 西岡
Original Assignee
Matsushita Electric Works Ltd
松下電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2001-226699 priority Critical
Priority to JP2001226699 priority
Application filed by Matsushita Electric Works Ltd, 松下電工株式会社 filed Critical Matsushita Electric Works Ltd
Priority to JP2002218989A priority patent/JP2003110146A/en
Publication of JP2003110146A publication Critical patent/JP2003110146A/en
Priority claimed from TW92114454A external-priority patent/TWI291769B/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50Wavelength conversion elements
    • H01L33/507Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161Disposition
    • H01L2224/16151Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/16221Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/16225Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52Encapsulations
    • H01L33/54Encapsulations having a particular shape
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58Optical field-shaping elements

Abstract

(57) [Problem] To provide a light emitting device that can extend the life as a product by using a structure in which a phosphor that deteriorates quickly and a resin containing the phosphor can be replaced. SOLUTION: The present invention relates to a light emitting device formed by mounting a light emitting element 2 on a mounting substrate 1 and including a fluorescent member 3 which is excited by light emission of the light emitting element 2 and emits light having a wavelength different from the excitation wavelength. The fluorescent member 3 is replaceable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device using a light emitting element.

[0002]

2. Description of the Related Art In recent years, LED chips that emit blue light or ultraviolet rays have been developed using gallium nitride compound semiconductors. Then, by combining this LED chip with various phosphors, it is possible to emit light having a color tone different from the emission color of the LED chip, including white.
Attempts have been made to develop a D light emitting device. This LED light emitting device has advantages such as small size, light weight, and power saving, and is currently widely used as a display light source, an alternative light source for a small light bulb, a liquid crystal panel light source, or the like.

As a publicly known example of this kind, Japanese Patent Laid-Open No. 2000-
No. 208815, No. 2002-158378, No. 5-152609, and No. 2001-1.
48512, JP 2001-57445 A,
JP-A-11-261114 and JP-A-2001-14
Examples thereof include those described in Japanese Patent No. 8509. In the LED light emitting device in these known examples,
A fluorescent substance or a resin containing a fluorescent substance is provided around the LED chip, and at least a part of the fluorescent substance or the resin is in contact with the LED chip.

[0004]

However, in the above LED light emitting device, the phosphor or the resin containing the phosphor is most quickly deteriorated, and the life of the LED light emitting device is not the LED chip itself but the phosphor or There is a problem that it is determined by the life of the resin containing the phosphor.

Further, in the face-up mounting such as the LED light emitting device described in the above publication, there is a problem that the conductive wire (bonding wire) becomes a shadow and the light from the light emitting element cannot be used efficiently. there were.

Further, for example, Japanese Patent Laid-Open No. 2000-101148.
As disclosed in Japanese Patent Laid-Open Publication No. 2003-264, there is a conventional example having a structure in which a phosphor or a resin containing a phosphor can be freely attached and detached as shown in FIG. That is, the light emitting diode described in the above publication is the light emitting element 2
43A, a mounting member 38, a mold portion 39 made of a transparent or translucent synthetic resin, a cap 40 containing a fluorescent substance, and the like.
It can be freely attached and detached as shown in (b). However, in this case, there is a problem that the light distribution cannot be controlled in the mold portion 39, and thus the irradiation cannot be performed efficiently.

The present invention has been made in view of the above points, and a light emitting device capable of extending the life of a product by adopting a structure in which a fluorescent substance or a resin containing the fluorescent substance that deteriorates quickly can be replaced. It is intended to provide.

Another object of the present invention is to provide a light emitting device capable of controlling the light distribution while extending the life of the phosphor and the resin containing the phosphor.

[0009]

In a light emitting device according to claim 1 of the present invention, a light emitting element 2 is mounted on a mounting substrate 1, and the light emitting element 2 is excited by the light emission of the light emitting element 2 and has a wavelength different from the excitation wavelength. In the light emitting device formed by including the fluorescent member 3 that emits light, the fluorescent member 3 is replaceable.

According to a second aspect of the present invention, in the first aspect, the optical member 4 including the fluorescent member 3 is detachably mounted on the surface or inside of the mounting substrate 1 on which the light emitting element 2 is mounted. It is characterized by consisting of.

According to a third aspect of the present invention, in the first or second aspect, the light emitting element 2 is mounted on the mounting substrate 1 by face-down mounting, and the optical member 4 is arranged to face the light emitting element 2. It is a feature.

The invention according to claim 4 is the same as claim 2 or 3, wherein the fluorescent member 3 is provided in the optical member 4 and the light emitting element 2 is provided.
It is characterized by being arranged at the position closest to.

According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the shape of the optical member 4 is a convex lens shape.

The invention of claim 6 is different from that of claim 2 in the direction of the light emitted from the optical member 4 whose wavelength is converted by the fluorescent member 3 and emitted. The optical member 4 is formed so as to have a shape in which the light emitted in the direction is totally reflected in the direction toward the light extraction surface 19.

Further, the invention of claim 7 is based on any one of claims 2 to 6, wherein a reflecting portion 23 is provided on the surface of the optical member 4 on the side of the light emitting element 2 and an opening for taking in light from the light emitting element 2. It is characterized in that the portion 24 is provided in the reflecting portion 23.

The invention according to claim 8 is the optical device according to any one of claims 2 to 7, wherein the optical member 4 includes a low-refractive-index member 25 having a refractive index lower than that of the optical member 4, and the light passing through the fluorescent member 3 is provided. Alternatively, the low refraction member 25 is arranged so that the light whose wavelength is converted by the fluorescent member 3 is incident on the optical member 4 through the low refraction member 25.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the fluorescent member 3 is formed so that the light from the light emitting element 2 passes through the fluorescent member 3 with substantially the same optical path length. It is characterized by being formed.

According to a tenth aspect of the present invention, in the ninth aspect, at least one of the surface of the fluorescent member 3 on the light extraction surface 19 side and the surface of the fluorescent member 3 on the light emitting element 2 side is formed into a curved surface. It is characterized by.

Further, the invention of claim 11 relates to claims 1 to 1.
0, the fluorescent member 3 is arranged so as to substantially surround the light emitting element 2.

The invention of claim 12 relates to claims 1 to 1.
1 any one of which has a recess 6 formed in the mounting substrate 1.
The light emitting element 2 is mounted on the bottom surface of the light emitting element 2, and the surface of the fluorescent member 3 on the light emitting element 2 side is formed to have a size substantially equal to the opening surface of the recess 6.

According to a thirteenth aspect of the present invention, in the twelfth aspect, the inner peripheral surface of the recess 6 is formed in a substantially parabolic shape, and the light emitted from the light emitting element 2 is reflected by the inner peripheral surface. It is characterized in that it can enter the fluorescent member 3.

According to a fourteenth aspect of the present invention, in the twelfth aspect, the inner peripheral surface of the recess 6 is formed into a substantially elliptical shape, and the light emitted from the light emitting element 2 is reflected by the inner peripheral surface. It is characterized in that it can enter the fluorescent member 3.

Further, the invention of claim 15 is based on claims 2 to 1.
4 is characterized in that a gap portion 26 for heat radiation is provided between the optical member 4 and the mounting substrate 1.

Further, the invention of claim 16 is based on claims 1 to 1.
5 is characterized in that the light emitting element 2 is sealed by the translucent resin 27, and the surface of the sealed translucent resin 27 on the light extraction surface 19 side is formed into a curved shape. It is a thing.

Further, the invention of claim 17 is based on claims 1 to 1.
In any one of 6, the antireflection film 28 that reduces the light reflectance of the surface of the fluorescent member 3 with respect to the light emission of the light emitting element 2 and increases the incident amount into the fluorescent member 3 is provided between the fluorescent member 3 and the light emitting element 2. It is characterized by being interposed between.

The invention of claim 18 relates to claims 2 to 1.
7 is characterized in that a light diffusing material 29 that scatters light from the light emitting element 2 or the fluorescent member 3 is interposed between the fluorescent member 3 and the optical member 4.

Further, the invention of claim 19 is based on claims 2 to 1.
In any one of 8), the optical member 4 is formed by using an inorganic transparent material.

According to a twentieth aspect of the present invention, in the first aspect, the light emitting element 2 mounted on the mounting substrate 1 is covered.
A semi-spherical dome 5 formed of a transparent material including the fluorescent member 3 is detachably mounted on the mounting substrate 1.

According to a twenty-first aspect of the present invention, in the first aspect, the light emitting element 2 is placed in the recess 6 formed in the mounting substrate 1, the recess 6 is filled with the fluorescent member 3, and a transparent material is used. The concave portion 6 is hermetically sealed by the formed removable lid 7.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

(Embodiment 1) FIG. 1 shows an example of an embodiment of a light emitting device according to the present invention. This light emitting device is formed as follows.

The mounting substrate 1 is formed of a printed wiring board or the like, and the mounting substrate 1 is provided with a recess 6 in which a light emitting element 2 such as an LED chip is mounted and mounted. The substrate 1 and the light emitting element 2 are electrically connected. At this time, in the structure shown in FIG. 1, bumps 8 are provided on the light emitting element 2 with solder or the like, the light emitting element 2 is mounted on the bottom surface of the recess 6 of the mounting substrate 1, and bumps are applied to electrodes (not shown) of the mounting substrate 1. Although the electrical connection is made by joining 8 together, the electrode of the light emitting element 2 and the electrode of the mounting substrate 1 can be connected by a conductive wire.

An optical member (transparent component) 4 such as a lens is detachably mounted on the mounting substrate 1 on the side where the recess 6 is provided. The optical member 4 is formed by including the fluorescent member (wavelength conversion substance) 3 on the surface or inside thereof. In the structure shown in FIG. 1, the fluorescent member 3 is fixed to the surface facing the recess 6 side. However, the fluorescent member 3 can be fixed to the surface on the opposite side. The fluorescent member 3 refers to a member that is excited by the light emitted from the light emitting element 2 and emits light having a wavelength different from the excitation wavelength, and examples thereof include a phosphor.

When fixing the fluorescent member 3 to the surface of the optical member 4, a resin containing a fluorescent material is applied to the surface of the optical member 4, or the optical member 4 facing the recess 6 side as shown in FIG.
This can be performed by providing a concave portion 9 on the surface of the corresponding to the concave portion 6 of the mounting substrate 1 and filling the concave portion 9 with a resin containing a phosphor.

Alternatively, for example, the optical member 4 can be formed by dispersing the phosphor in a transparent resin and using the dispersion in a transfer molding method or the like. The optical member 4 formed in this manner has a structure in which the fluorescent material, which is the fluorescent member 3, is dispersed and contained, and it is not necessary to fix the fluorescent member 3 to the optical member 4 again, 4 and the fluorescent member 3 can be fixed at the same time.

A light emitting device can be formed by mounting the optical member 4 on the mounting board 1. In order to make the optical member 4 detachable from the mounting board 1. , Can be performed as follows. For example, as shown in FIG. 1, the protrusion 10 is provided so as to protrude from the surface of the mounting substrate 1 along the outer peripheral edge of the optical member 4. By doing so, the optical member 4 is placed on the surface of the mounting component, and at the same time, the inner surface 11 of the projecting piece 10 of the mounting substrate 1 and the outer surface 1 of the outer peripheral end of the optical member 4 are mounted.
As a result, the optical member 4 and the mounting board 1 can be mounted by fitting. Moreover, with such a fitting structure, the optical member 4 can be detached from the mounting substrate 1 by pulling them in a direction in which they are separated from each other. Is free. Here, when the projecting piece 10 of the mounting board 1 is formed so as to be inclined slightly inward, the inner surface 11 of the projecting piece 10 and the outer surface 12 of the optical member 4 make elastic contact with each other, so that the mounting board 1 is removed. The optical member 4 can be prevented from being accidentally detached.

As the optical member 4, a lens having a convex curved surface 17 corresponding to the concave portion 6 as shown in FIG. 1 can be used, but the present invention is not limited to this.
Besides, a cover or the like can also be used. Further, the structure for mounting the optical member 4 on the mounting substrate 1 may be any structure as long as the optical member 4 can be freely attached and detached, and a screwing structure or the like may be adopted in addition to the above-described fitting structure. You can

In the light-emitting device formed as described above, the fluorescent member 3 such as the fluorescent substance or the resin containing the fluorescent substance that is most rapidly deteriorated is included only in the optical member 4, and the optical member 4 is also included. Since it is detachable from the mounting substrate 1, if the performance of the light emitting device is deteriorated due to deterioration of the fluorescent member 3, it is only necessary to leave the mounting substrate 1 as it is and replace the optical member 4 with a new one. As a result, the fluorescent member 3 is replaced with a new one that has not deteriorated, the performance of the light emitting device is restored, and the life of the product can be extended.

(Embodiment 1-2) FIG. 2 shows an example of an embodiment of a light emitting device according to claim 3 of the present invention. This light emitting device is formed as follows.

The mounting board 1 is formed of a printed wiring board or the like, and the mounting board 1 is provided with a recess 6, and a light emitting element 2 such as an LED chip is face-down mounted in the recess 6. It is mounted and the mounting substrate 1 and the light emitting element 2 are electrically connected. That is, in the structure shown in FIG. 2, the bumps 8 are provided on the light emitting element 2 with solder or the like,
The light emitting element 2 is mounted on the bottom surface of the concave portion 6 of the mounting substrate 1, and the bumps 8 are bonded to the electrodes that are electrically connected to the wiring portions 18 of the mounting substrate 1, whereby electrical connection is made.

An optical member 4 such as a lens is detachably mounted on the mounting substrate 1 on the side where the recess 6 is provided.
That is, the optical member 4 is arranged so as to face the light emitting element 2. The optical member 4 is for controlling the light distribution and is formed by including the fluorescent member 3 on the surface or inside thereof. In the one shown in FIG. The fluorescent member 3 is fixed. Further, in the optical member 4, a desired optical shape can be formed on the surface opposite to the side facing the mounting substrate 1 (hereinafter referred to as the light extraction surface 19).

When fixing the fluorescent member 3 to the surface of the optical member 4, a resin containing a fluorescent substance is applied to the surface of the optical member 4, or the surface of the optical member 4 facing the light emitting element 2 as shown in FIG. In addition, a recess 9 may be provided corresponding to the recess 6 of the mounting substrate 1, and the recess 9 may be filled with a resin containing a phosphor. In this way, in particular, by disposing the fluorescent member 3 in the position closest to the light emitting element 2 in the optical member 4, the light emitted from the light emitting element 2 can be effectively incident on the fluorescent member 3. .

A light emitting device can be formed by mounting the optical member 4 on the mounting substrate 1. In order to attach the optical member 4 to the mounting substrate 1 in a detachable manner. , (Embodiment 1).

In the light emitting device formed as described above, the light emitted from the light emitting element 2 is incident on the fluorescent member 3 to excite it, and at the same time, the fluorescent member 3 emits light having a wavelength different from the excitation wavelength. Emit. The light of the excitation wavelength and the light of the wavelength emitted from the fluorescent member 3 are subjected to light distribution control by a predetermined optical shape formed on the light extraction surface 19 of the optical member 4 to realize a desired light distribution. Is something that can be done. Further, since the optical member 4 which is a member separate from the light emitting element 2 is formed with a predetermined optical shape and the fluorescent member 3 is included in the optical member 4, stress, heat,
The chemical load can be reduced.

Here, if the fluorescent member 3 and the light emitting element 2 are not in contact with each other, the fluorescent member 3 is not directly exposed to the heat of the light emitting element 2, and the fluorescent material or resin containing the fluorescent material is not used. Deterioration is reduced, and the life of the fluorescent member 3 can be extended, which suppresses the decrease of luminous flux and extends the life of the light emitting device. Moreover, since the fluorescent member 3 and the light emitting element 2 are not in contact with each other, the heat dissipation of the light emitting element 2 is improved.

Further, since the light emitting element 2 is mounted face down, the conductive wire is unnecessary, and the fluorescent member 3 such as a phosphor or a resin containing a phosphor is mounted on the light emitting element 2 as compared with the face up mounting. In the range where they do not contact, it becomes possible to bring them closer to the light emitting element 2. Therefore, more accurate and effective light distribution control becomes possible. Moreover, since a part of light emission is not blocked by the conductive wire, loss of light amount does not occur and the fluorescent member 3
The amount of light incident on the laser increases, and the luminous efficiency improves.

Further, since the fluorescent member 3 such as a fluorescent substance or a resin containing a fluorescent substance that is most rapidly deteriorated is included only in the optical member 4, and the optical member 4 is detachable from the mounting substrate 1. When the performance of the light emitting device is deteriorated due to deterioration of the fluorescent member 3, the mounting substrate 1 is left as it is,
All that is required is to replace the optical member 4 with a new one, which will replace the fluorescent member 3 with a new one that has not deteriorated.
The performance of the light emitting device is recovered and the life of the product can be extended.

(Embodiment 1-3) FIG. 3 shows an example of an embodiment of a light-emitting device according to claim 5 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). Etc., but is particularly characterized in that the shape of the optical member 4 is a convex lens shape. If the optical member 4 is formed in this way, the light emitted from the fluorescent member 3 is easily controlled in a predetermined direction by the convex lens shape of the optical member 4, as shown by the arrow in FIG. Is something that can be done.

(Embodiment 1-4) FIG. 4 shows an example of an embodiment of a light-emitting device according to claim 6 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). However, the optical member 4 is characterized in that it has the following shape.

That is, when the optical member 4 is formed, of the light whose wavelength is converted by the fluorescent member 3 and emitted, the light emitted in a direction different from the direction toward the light extraction surface 19 of the optical member 4 is The shape is such that the light is totally reflected in the direction toward the light extraction surface 19. Such a shape can be obtained by, for example, providing a mountain-shaped convex portion 22 having a smooth outer surface 20 and a flat tip 21 on the surface opposite to the light extraction surface 19 of the optical member 4. Can be formed. The tip portion 21 of the convex portion 22 is provided with a recess 9 for filling the fluorescent member 3.

Normally, the light emitted from the fluorescent member 3 is directed toward the light extraction surface 19 (arrow A in FIG. 4) and light directed substantially laterally without going to the light extraction surface 19 (arrow indicated in FIG. 4). B) and divided. However, the optical member 4
Is formed so as to have the above-described shape, the light that is directed to the light extraction surface 19 from the beginning is as it is.
Of course, even if the light does not go out to the light extraction surface 19 from the beginning, such light is totally reflected by the outer surface 20 of the convex portion 22, so that the light extraction surface 19 can be extracted. The light can be directed toward and the light distribution can be controlled in a predetermined direction.

(Embodiment 1-5) FIG. 5 shows an example of an embodiment of a light emitting device according to claim 7 of the present invention.
4), but is different from (Embodiment 1-4) in the following points.

That is, in this embodiment, the reflecting portion 23 is provided on the surface of the optical member 4 on the light emitting element 2 side, and
An opening 24 for taking in light from the light emitting element 2 is provided in the reflecting portion 23. Specifically, the reflecting portion 23 is provided on the surface of the optical member 4 on the light emitting element 2 side by aluminum deposition or the like, and at this time, aluminum vapor deposition or the like is performed on all or part of the tip end portion 21 of the convex portion 22. The opening 24 is provided by not performing. That is, the light emitted from the light emitting element 2 can be taken into the fluorescent member 3 through the opening 24.

As described above, normally, the light emitted from the fluorescent member 3 is directed to the light extraction surface 19 (arrow A in FIG. 5) and light directed substantially laterally without going to the light extraction surface 19. (Arrow B in FIG. 5). However, if the optical member 4 is provided with the reflecting portion 23 and the reflecting portion 23 is provided with the opening 24 as described above,
The light that has been directed to the light extraction surface 19 from the beginning is of course directly extracted from the light extraction surface 19 to the outside, but even if the light does not go to the light extraction surface 19 from the beginning, all such light will be output from the convex portion 22. The light can be totally reflected by the side surface 20 and the like, whereby the light can be directed to the light extraction surface 19, and the light distribution can be controlled in a predetermined direction.

Further, since the reflecting portion 23 is provided on the surface of the optical member 4 on the light emitting element 2 side except the opening 24,
The light once introduced into the optical member 4 through the opening portion 24 is totally reflected by the reflecting portion 23 so that it does not escape to the mounting substrate 1 side, and the luminous efficiency is further improved.

Further, since the reflecting portion 23 is provided on the surface of the optical member 4 on the side of the light emitting element 2, that is, between the optical member 4 and the mounting substrate 1, it cannot be easily touched, and deterioration and stains can be reduced. Is something that can be done.

Further, the mounting substrate 1 is formed by aluminum vapor deposition or the like.
Although it is difficult to provide the reflecting portion 23 on the optical member 4, the reflecting portion 23 can be easily provided on the optical member 4.

(Embodiment 1-6) FIG. 6 shows an example of an embodiment of a light-emitting device according to claim 8 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). However, in the present embodiment, the optical member 4 is formed.
It is characterized in that the low refractive member 25 having a lower refractive index is used.

That is, the optical member 4 is provided with the low-refractive member 25, and the light that has passed through the fluorescent member 3 or the light whose wavelength has been converted by the fluorescent member 3 is incident on the optical member 4 through the low-refractive member 25. As described above, the low refraction member 25 is arranged in the optical member 4. Specifically, the low refractive index member 2 such as silica airgel is formed on the inner surface of the recess 9 provided in the optical member 4.
5 is applied and arranged, and then the fluorescent member 3 is filled.

Then, the light passing through the fluorescent member 3 or the light whose wavelength is converted by the fluorescent member 3, that is, the light emitted from the fluorescent member 3 is made incident on the low-refractive-index member 25 and then on the optical member 4. be able to. Low refraction member 25
When entering from the optical member 4 to the optical member 4, the light is bent in the direction of being narrowed by the refraction action, so that a larger amount of light can be controlled to be distributed. Further, as described above, by forming an interface between the fluorescent member 3 and the optical member 4 by the low-refractive-index member 25, the refraction effect can be utilized, and as shown in FIG. 3 (Embodiment 1-3). Optical member 4
The convex lens shape of the light extraction surface 19 can be made gentler.

(Embodiment 1-7) FIG. 7 shows an example of an embodiment of a light-emitting device according to claim 9 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). However, in the present embodiment, the fluorescent member 3 is formed so that the light emitted from the light emitting element 2 passes through the fluorescent member 3 with a substantially equal optical path length.
Specifically, on the surface of the optical member 4 on the mounting substrate 1 side,
The recess 9 is formed into a hemispherical shape, and the hemispherical recess 9 is filled with the fluorescent member 3 so that the fluorescent member 3 is formed into a hemispherical shape. Since it is easy to provide the hemispherical recess 9 in the optical member 4, it is possible to easily form the hemispherical fluorescent member 3 only by filling the recess 9 with the fluorescent member 3. The opening edge of the recess 9 has a circular shape, and by disposing the light emitting element 2 at the approximate center thereof, the distances from the light emitting element 2 to the inner surface of the recess 9 are substantially equal in all directions, and the light emitting element 2 The emitted light can pass through the fluorescent member 3 with substantially equal optical path lengths.

That is, when the light emitted from the light emitting element 2 passes through the fluorescent member 3, it becomes equidistant in any direction,
The distance for exciting the fluorescent member 3 is also the same. Therefore, color unevenness at the light extraction surface 19 can be suppressed by relaxing the color characteristics for each angle.

(Embodiment 1-8) FIG. 8 shows an example of an embodiment of a light-emitting device according to claim 11 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). In the present embodiment, at least one of the surface of the fluorescent member 3 on the light extraction surface 19 side and the surface of the fluorescent member 3 on the light emitting element 2 side is formed into a curved surface. There are features. In this embodiment, the light emitting element 2 is mounted on the mounting substrate 1 without forming the concave portion 6, but the mounting substrate 1 is provided with the concave portion 6 and the light emitting element 2 is formed on the bottom surface of the concave portion 6. May be mounted.

Also in this embodiment, (Embodiment 1-
Similar to 7), the fluorescent member 3 is arranged so that the light emitted from the light emitting element 2 passes through the fluorescent member 3 with substantially the same optical path length.
Is formed. Specifically, the mounting substrate 1 of the optical member 4
On the side surface, the recess 9 is formed in a hemispherical shape, and the hemispherical recess 9 is filled with the fluorescent member 3. At this time, the recess 9 is filled with the fluorescent member 3 such that the surface of the optical member 4 on the light emitting element 2 side (excluding the recess 9) and the surface of the fluorescent member 3 on the light emitting element 2 side are flush with each other. For example, although it becomes similar to (Embodiment 1-7) (see FIG. 7), in this embodiment, as shown in FIG. The surface of the fluorescent member 3 on the side of the light emitting element 2 is formed so as to be a curved surface that is recessed toward the inner surface of the recess 9 by slightly reducing it. That is, in (Embodiment 1-7), only the surface on the light extraction surface 19 side of the fluorescent member 3 is formed into a curved surface, whereas in the present embodiment, the light extraction surface 19 side of the fluorescent member 3 is formed. And the surface of the fluorescent member 3 on the light emitting element 2 side are both formed into curved surfaces. Further, the opening edge of the recess 9 has a circular shape, and by disposing the light emitting element 2 substantially at the center thereof, the distances from the light emitting element 2 to the inner surface of the recess 9 are substantially equal in all directions, and the light emitting element 2
The light emitted from the fluorescent substance 3 can pass through the fluorescent member 3 with a substantially equal optical path length.

As described above, when the light emitted from the light emitting element 2 passes through the inside of the fluorescent member 3, it becomes equidistant in any direction, and the distance for exciting the fluorescent member 3 is also the same. Therefore, color unevenness at the light extraction surface 19 can be suppressed by relaxing the color characteristics for each angle.

Further, in this embodiment, since the light emitting element 2 is mounted on the mounting substrate 1 without forming the concave portion 6, the periphery of the light emitting element 2 (excluding the surface on the mounting substrate 1 side).
Are all surrounded by the fluorescent member 3, so that the lateral light emitted from the light emitting element 2, that is, the light emitted substantially parallel to the surface of the mounting substrate 1 is also easily incident on the fluorescent member 3, and the luminous efficiency is improved. It will be even better.

(Embodiment 1-9) FIG. 9 shows an example of an embodiment of a light emitting device according to claim 11 of the present invention. This light emitting device is basically the same as the (embodiment 1) described above. However, in the present embodiment, the fluorescent member 3 is arranged so as to substantially surround the light emitting element 2. Specifically, the fluorescent member 3 is disposed by coating the inner surface of the recess 9 provided in the optical member 4 with the fluorescent member 3, and the light emitting element 2 is disposed in the recess 9.
Substantially surrounds the light emitting element 2. Also in this embodiment, as in (Embodiment 1-8), the light emitting element 2 is mounted on the mounting substrate 1 without forming the concave portion 6.

As described above, when the light emitting element 2 is mounted on the mounting substrate 1 without forming the concave portion 6, it becomes easy to dispose the light emitting element 2 in the recess 9 of the optical member 4, and the light emitting element 2 All around (except the surface on the mounting substrate 1 side) the fluorescent member 3
Thus, most of the light emitted from the light emitting element 2 can be made incident on the fluorescent member 3 and the wavelength thereof can be converted, and the utilization efficiency of the light from the light emitting element 2 can be improved. . Although the light emitting element 2 and the fluorescent member 3 are not in contact with each other in FIG. 9, the light emitting element 2 and the fluorescent member 3 may be in contact with each other.

(Embodiment 1-10) FIG. 10 shows an example of an embodiment of a light-emitting device according to claim 12 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). However, in this embodiment, the surface of the fluorescent member 3 on the light emitting element 2 side is formed to have substantially the same size as the opening surface of the recess 6 formed in the mounting substrate 1. . Specifically, the opening edge of the recess 9 of the optical member 4 and the opening edge of the recess 6 of the mounting substrate 1 have substantially the same shape, and both are matched. Then, by filling the recess 9 with the fluorescent member 3, the surface of the fluorescent member 3 on the light emitting element 2 side can be made substantially the same size as the opening surface of the recess 6.

In this way, the size of the fluorescent member 3 for converting the wavelength of the light emitted from the light emitting element 2 can be effectively limited, and a pseudo light source as small as possible can be obtained. . Therefore, in the optical member 4, the light distribution can be easily controlled by the optical shape on the light extraction surface 19 side, and the desired light distribution can be easily realized. Furthermore, since the surface of the fluorescent member 3 on the light emitting element 2 side is made substantially the same size as the opening surface of the concave portion 6, the emission diameter of the fluorescent member 3 is not blurred and the light distribution controllability is improved. is there.

(Embodiment 1-11) FIG. 11 shows an example of an embodiment of a light emitting device according to claim 13 of the present invention. This light emitting device basically has the above-mentioned (embodiment 1). However, in the present embodiment, the inner peripheral surface of the recess 6 provided in the mounting substrate 1 is formed in a substantially parabolic shape. The light emitted from the light emitting element 2 is reflected on the inner surface of the parabolic shape so that the light can enter the fluorescent member 3. Then, as shown by the two arrows in FIG. 11, all the light incident on the fluorescent member 3 can be made into a state close to parallel light, and a large amount of light incident on the fluorescent member 3 can be obtained, and at the same time, the fluorescent light can be obtained. By averaging the light emission luminance distribution of the member 3, it is possible to suppress color unevenness on the light extraction surface 19.

(Embodiment 1-12) FIG. 12 shows an example of an embodiment of a light-emitting device according to claim 14 of the present invention. This light-emitting device is basically the above-mentioned (embodiment 1). However, in the present embodiment, the inner peripheral surface of the recess 6 formed in the mounting substrate 1 is formed into a substantially elliptical shape. Then, the light emitted from the light emitting element 2 is reflected on the inner peripheral surface of the substantially elliptical shape so that it can enter the fluorescent member 3. Then, as shown by the two arrows in FIG. 12, it is possible to obtain a large amount of light incident on the fluorescent member 3, and at the same time, the fluorescent member 3 can be obtained.
It is possible to condense the light at the central portion of the light source, and the light emitted from the fluorescent member 3 has a high luminance at the central portion, and the narrow-angle light distribution performance is realized, so that a more point light source can be realized.

(Embodiment 1-13) FIG. 13 shows an example of an embodiment of a light emitting device according to claim 15 of the present invention. This light emitting device is basically the same as the (embodiment 1) described above. However, in the present embodiment, when forming the light emitting device, the optical member 4 and the mounting substrate 1 are separated from each other, and a gap portion 2 for radiating heat therebetween is formed.
6 is provided so that the gap 26 and the recess 6 of the mounting substrate 1 are communicated with each other. By doing so, the flow of gas (usually air) as shown by the dotted arrow in FIG. 13 can be easily generated, and the light emitting element 2 mounted on the bottom surface of the recess 6 is exposed to the gas. The heat dissipation of the light emitting element 2 can be promoted, and the life of the light emitting device can be extended.

(Embodiment 1-14) FIG. 14 shows an example of an embodiment of a light emitting device according to claim 16 of the present invention. This light emitting device is basically the same as the (embodiment 1) described above. However, in the present embodiment, after the mounting substrate 1 and the light emitting element 2 are electrically connected, the light emitting element 2 is sealed with a translucent resin 27 such as a silicone resin. There is. Here, as the translucent resin 27, a resin having a refractive index higher than that of air and smaller than the light emitting element 2 is preferable. The surface of the translucent resin 27 on the light extraction surface 19 side after the sealing is formed to have a curved shape. The curved surface shape is not particularly limited, but may be, for example, a hemispherical convex curved surface shape.

By thus sealing the light emitting element 2 with the transparent resin 27, the efficiency of extracting light to the outside of the light emitting element 2 can be improved, and the surface of the transparent resin 27 is further improved. The curved surface makes it possible to reduce the component of light that is totally reflected at the interface between the translucent resin 27 and the air, and further to increase the light extraction efficiency. It is possible to increase the utilization efficiency of.

(Embodiment 1-15) FIG. 15 shows an example of an embodiment of a light emitting device according to claim 17 of the present invention. This light emitting device is basically the same as (embodiment 1) or the like. Although formed in the same manner, in the present embodiment, the antireflection film 28 is interposed between the fluorescent member 3 and the light emitting element 2. The antireflection film 28 is not particularly limited as long as it reduces the light reflectance of the surface of the fluorescent member 3 with respect to the light emission of the light emitting element 2 and increases the incident amount into the fluorescent member 3. , SiO 2 film / TiO 2
It is possible to use a plurality of optical multi-layered films which are alternately formed by combining the films. Then, by forming such an antireflection film 28 on the surface of the fluorescent member 3 on the light emitting element 2 side, the antireflection film 28 can be interposed between the fluorescent member 3 and the light emitting element 2. At this time, aluminum vapor deposition may be performed on the surface of the optical member 4 on the mounting substrate 1 side other than the portion where the antireflection film 28 is formed.

By interposing the antireflection film 28 between the fluorescent member 3 and the light emitting element 2 as described above, the amount of light of the light emitted from the light emitting element 2 which is incident on the fluorescent member 3 can be increased. Therefore, the efficiency of the light emitting element 2 can be increased. Further, if aluminum is vapor-deposited on the surface of the optical member 4 on the mounting substrate 1 side other than the portion where the antireflection film 28 is formed, the light extraction efficiency can be further increased.

(Embodiment 1-16) FIG. 16 shows an example of an embodiment of a light emitting device according to claim 18 of the present invention. This light emitting device is basically the same as (embodiment 1) or the like. Although formed in the same manner, in the present embodiment, the light diffusing material 29 is interposed between the fluorescent member 3 and the optical member 4. The light diffusing material 29 is not particularly limited as long as it scatters the light from the light emitting element 2 or the fluorescent member 3, but is, for example, SiO having a size of about 1 to 2 μm.
Two fine particles can be used. When interposing the light diffusion material 29 between the fluorescent member 3 and the optical member 4, for example, as shown in FIG. 16, the light diffusion material 29 is applied to the inner surface of the recess 9 of the optical member 4. After the above arrangement, the fluorescent member 3 may be further filled therein.

When the light diffusing material 29 is interposed between the fluorescent member 3 and the optical member 4 as described above, the light emitted from the light emitting element 2 and the light emitted from the fluorescent member 3 become diffused light. As a result, the color characteristics depending on the angle are alleviated, and the color unevenness on the light extraction surface 19 can be suppressed.

The above (Embodiment 1) to (Embodiment 1-1)
In 6), the optical member 4 can be formed using an inorganic transparent material such as transparent glass. Thereby, the weather resistance of the optical member 4 can be improved, and the deterioration of the optical member 4 due to the light emitted from the fluorescent member 3 can be suppressed by the inorganic material such as glass. As the light emitting element 2, an LED chip that emits blue light (blue LE
This is effective not only when using D) but especially when using an LED chip (ultraviolet LED) that emits ultraviolet rays. Further, the thermal expansion of the optical member 4 can be reduced.

(Embodiment 2) FIG. 17 shows another embodiment of the light emitting device according to the present invention. This light emitting device is formed as follows.

That is, as in the first embodiment, the mounting board 1 is formed of a printed wiring board or the like, and the mounting board 1 is provided with a recess 6, and the recess 6 has an LED chip or the like. The light emitting element 2 is mounted, and the mounting substrate 1 and the light emitting element 2 are electrically connected.

A hemispherical dome 5 is detachably attached to the mounting substrate 1 so as to cover the light emitting element 2.
At this time, the light emitting element 2 is substantially in the center of the dome 5, and the dome 5 is made of a transparent material such as resin or glass including the fluorescent member 3 such as a fluorescent material, and has a substantially constant thickness. I have to.

As described above, the light emitting device can be formed by mounting the hemispherical dome 5 on the mounting substrate 1. In order to make the dome 5 detachable from the mounting substrate 1. Can be performed as follows. For example, as shown in FIG. 17, the dome 5
A recessed portion 13 having a width substantially the same as the width of the opening edge is provided in the surface of the mounting substrate 1 along the opening edge. By doing so, the recess 13 of the mounting board 1
The opening edge of the dome 5 is placed on the bottom surface of the dome 5, and at the same time, the opening edge of the dome 5 is sandwiched between the inner peripheral surfaces of the recessed portion 13 facing each other, so that the dome 5 and the mounting substrate 1 are fitted together. Is something that can be done. Moreover, with such a fitting structure, the dome 5 can be detached from the mounting substrate 1 by pulling them in a direction in which they are separated from each other, and the dome 5 can be freely attached to and detached from the mounting substrate 1. It will be. Here, if the inner peripheral surface of the recessed portion 13 is formed with a slight inclination so that it extends toward the back, that is, if it is formed in a tapered shape, the recessed portion with respect to the opening edge of the dome 5 is recessed. By elastically contacting the inner peripheral surface of the portion 13, the dome 5 can be prevented from being accidentally detached from the mounting substrate 1.

In the light emitting device formed as described above, the fluorescent member 3 such as a fluorescent substance that is most rapidly deteriorated is included only in the dome 5, and the dome 5 is attached to the mounting substrate 1. Since the fluorescent member 3 is detachable, when the performance of the light emitting device is deteriorated due to deterioration of the fluorescent member 3, it is sufficient to leave the mounting substrate 1 as it is and replace the dome 5 with a new one. It will be replaced with a new one, and the performance of the light emitting device will be restored and the life of the product can be extended.

Further, in the present embodiment, the dome 5 including the fluorescent member 3 is formed in a hemispherical shape and has a substantially constant thickness, so that the light emitting element located substantially at the center of the dome 5 is formed. The distances from 2 to the inner and outer surfaces of the dome 5 are substantially equal in all directions,
Even if the light emitting device is observed from any angle, color unevenness does not occur.

(Embodiment 3) FIG. 18 shows still another example of the embodiment of the light emitting device according to the present invention, and this light emitting device is formed as follows.

That is, as in the first and second embodiments, the mounting board 1 is formed of a printed wiring board or the like,
A recess 6 is provided in the mounting substrate 1, and a light emitting element 2 such as an LED chip is mounted in the recess 6, and the mounting substrate 1 and the light emitting element 2 are electrically connected.

Then, the concave portion 6 is filled with a fluorescent member 3 such as a fluorescent substance, and a lid 7 formed of a transparent material is used.
However, it is detachably mounted on the mounting substrate 1 so as to seal the concave portion 6 described above. At this time, the light emitting element 2 only needs to be buried in the fluorescent member 3 as shown in FIG. 18, and it is not necessary to fill the entire interior of the recess 6 with the fluorescent member 3.

Although the light emitting device can be formed as described above, the lid 7 can be attached to and detached from the mounting substrate 1 as follows. For example, as shown in FIG. 18, the recess 6 of the mounting substrate 1 is formed in a substantially mortar shape, and the notch step portion 14 is formed in the middle of the inner peripheral surface of the mortar-shaped recess 6. is there. Here, the notch step portion 14 is formed so as to have a mounting surface 16 that is substantially parallel to the bottom surface of the recess 6 and an inner surface portion 15 that is substantially perpendicular to the mounting surface 16. By doing so, the mounting surface 16 of the notched step portion 14 is covered with the lid 7.
At the same time that the peripheral edge of the back surface of the lid 7 is placed, the inner surface portion 15 of the notch step portion 14 and the side surface of the peripheral edge of the lid 7 come into contact with each other, so that the lid 7 and the mounting substrate 1 can be fitted together. is there. Moreover, with such a fitting structure, when removing the lid 7 from the mounting substrate 1, the lid 7 can be pulled out from the recess 6, and the lid 7 can be attached to and detached from the mounting substrate 1. It is free. Here, if the inner surface portion 15 of the notch step portion 14 is formed so as to be wider toward the back and is slightly inclined, that is, if it is formed in a tapered shape, the inner surface portion 15 of the notch step portion 14 and the lid are closed. By making elastic contact with the peripheral side surface of 7,
The lid 7 can be prevented from being accidentally detached from the mounting substrate 1.

In the light-emitting device formed as described above, the fluorescent member 3 such as a phosphor that is the fastest to deteriorate is located in the recess 6, and the recess 6 is sealed by the detachable lid 7. Therefore, when the performance of the light emitting device is deteriorated due to the deterioration of the fluorescent member 3, the lid 7 is once removed, the deteriorated fluorescent member 3 is removed from the inside of the recess 6, and then the new undegraded fluorescent member 3 is inserted into the recess 6. Then, the fluorescent member 3 can be replaced with a new one, the performance of the light emitting device can be recovered, and the life of the product can be extended.

Furthermore, in the present embodiment, since it is sufficient to fill the concave portion 6 with the fluorescent member 3 to such an extent that the light emitting element 2 in the concave portion 6 is hidden, the fluorescent member to be used is different from that of the first and second exemplary embodiments. Since the quantity of 3 is small and only a small amount of the fluorescent member 3 needs to be replaced, the manufacturing / replacement cost can be reduced. Moreover, in the present embodiment, it is mounted on the surface of the mounting substrate 1 like the optical member 4 of the first embodiment, or is projected from the surface of the mounting substrate 1 like the dome 5 of the second embodiment. Since no parts are required, the light emitting device can be made thinner.

[0093]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 FIG. 19 shows a light emitting device according to claim 3 of the present invention. A blue LED was used as the light emitting element 2, and this was mounted face down in the recess 6 formed in the mounting substrate 1. On the other hand, a silicone resin mixed with a YAG phosphor is used as the fluorescent member 3, and a transparent acrylic resin is used as the optical member 4,
After the fluorescent member 3 was filled in the recess 9 provided in the optical member 4, the opening of the recess 9 was covered with a lid body 30 formed of a translucent resin. Here, the YAG phosphor is a yellow light emitting phosphor that is excited by blue light to emit yellow light, and the silicone resin has substantially the same refractive index as the acrylic resin forming the optical member 4. Was used. The type of resin used as the fluorescent member 3 is not limited to this embodiment, but the light distribution control is performed by using the same material as the optical member 4 or a material having a refractive index close to that of the optical member 4. Is desirable.

Then, the fluorescent member 3 included in the optical member 4
A light emitting device was formed by disposing the light emitting element 2 facing the light emitting element 2. At this time, although not shown in FIG. 19, the fitting structure as shown in FIG. 1 was formed in the light emitting device by processing a part of the optical member 4 and the mounting substrate 1. As a result, the optical member 4 can be attached to and detached from the mounting board 1. The same applies to the following examples.

In the light emitting device formed as described above, when the blue LED is made to emit light, the blue light emitted from this blue LED enters the fluorescent member 3 to excite it, and at the same time, the fluorescent member 3 Emits yellow light, and in the end, white light can be emitted by mixing two colors of blue light and yellow light.

Example 2 FIG. 20 shows a light emitting device according to claim 4 of the present invention. A light emitting device was formed in the same manner as in Example 1 except that the fluorescent member 3 was placed immediately above the light emitting element 2 so that the fluorescent member 3 was placed closest to the light emitting element 2.

In addition to the same effect as in Example 1, the amount of light incident on the fluorescent member 3 was increased, and the luminous efficiency was improved.

Example 3 FIG. 21 shows a light emitting device according to claim 5 of the present invention. A light emitting device was formed in the same manner as in Example 2 except that the optical member 4 had a bullet-shaped convex lens shape.

The same effect as in Example 2 was obtained, and the light distribution could be easily controlled.

Example 4 FIG. 22 shows another example of the light emitting device according to claim 5 of the present invention. Mounting substrate 1 has a plurality of recesses 6
Except that the light emitting element 2 is face-down mounted in each recess 6 and the optical member 4 is a multi-lens having a convex lens shape corresponding to each light emitting element 2 formed on the light extraction surface 19. A light emitting device was formed in the same manner as in Example 2.

In addition to obtaining the same effect as in Example 3, it was possible to irradiate a larger amount of light by using a plurality of light sources. Moreover, since a plurality of convex lens shapes can be integrally molded, the processing is easy.

(Embodiment 5) FIG. 23 shows a light emitting device according to claim 6 of the present invention. A light emitting device was formed in the same manner as in Example 2 except that the optical member 4 having the following shape was used. That is, the shape of the optical member 4 is such that the light extraction surface 19 is flat and the opposite side thereof is a truncated cone-shaped convex portion 2.
2 is provided. The tip portion 21 of the convex portion 22 is flat, and a recess 9 is provided at the substantially center thereof.

In addition to obtaining the same effect as that of the second embodiment, it is effective to totally reflect the light (arrow B in FIG. 23) emitted from the fluorescent member 3 in the lateral direction on the outer surface 20 of the convex portion 22. It was possible to take out from the light extraction surface 19.

(Embodiment 6) FIG. 24 shows a light emitting device according to claim 7 of the present invention. On the surface of the optical member 4 on the mounting substrate 1 side, aluminum is vapor-deposited on the surface other than the opening of the recess 9 to form the reflecting portion 2.
A light emitting device was formed in the same manner as in Example 5 except that 3 was provided. A reflective surface having a high reflectance could be formed by aluminum vapor deposition.

In addition to obtaining the same effect as in Example 5, there is no light that escapes from the inside of the optical member 4 to the mounting substrate 1 side.
The luminous efficiency could be further improved.

(Embodiment 7) FIG. 25 shows another example of the light emitting device according to claim 7 of the present invention. A light emitting device was formed in the same manner as in Example 6 except that the optical member 4 having the following shape was used. That is, the shape of the optical member 4 is such that the light extraction surface 19 is flat and the opposite side surface is the outer surface 20.
It has a shape in which a convex portion 22 having a step portion (inflection point) 38 is provided around the circumference. With respect to the light extraction surface 19, the inclination of the outer surface 20 on the light extraction surface 19 side from the step portion 38 is gentle, and the inclination of the outer surface 20 from the step portion 38 on the tip 21 side of the convex portion 22 is made. The convex portion 22 is provided so as to be steep.

In addition to the same effects as in Example 6, the following effects could be obtained. That is, of the light emitted from the fluorescent member 3, the light directed to the light extraction surface 19 (arrow A in FIG. 25) is directly output to the outside from the light extraction surface 19 as it is, and the light substantially laterally traveled (arrow in FIG. 25). (B) is reflected by the outer surface 20 of the steeply-projecting portion 22 and is then extracted from the light extraction surface 19 to the outside, and then heads to the light extraction surface 19, but is totally reflected by the light extraction surface 19 and returned. What comes (arrow C in FIG. 25) is the outer surface 2 of the convex portion 22 having a gentle slope.
After being reflected at 0, the light was extracted from the light extraction surface 19 to the outside. That is, by using the outer surface 20 of the convex portion 22 as a reflecting surface, the direction of almost all the light emitted from the fluorescent member 3 can be controlled, and the light can be effectively extracted. In particular, since it is possible to control the light that is totally reflected and returned from the light extraction surface 19, it is considered that the light utilization efficiency is improved.

(Embodiment 8) FIG. 26 shows another example of the light emitting device according to claim 7 of the present invention. Other than forming the convex lens portion 31 as a part of the light extraction surface 19 as the optical member 4,
A light emitting device was formed in the same manner as in Example 7.

In addition to the same effects as in Example 7, the following effects could be obtained. That is, of the light emitted from the fluorescent member 3, it is easy to control the light particularly directed to the light extraction surface 19 (arrow A in FIG. 26) in the predetermined direction by the convex lens portion 31. That is, by forming the convex lens portion 31 on a part of the light extraction surface 19, it becomes easier to control the light distribution of almost all of the light emitted from the fluorescent member 3, and the light is effectively extracted in a predetermined direction. I was able to.

(Embodiment 9) FIG. 27 shows another example of the light emitting device according to claim 7 of the present invention. Step portion 3 as optical member 4
A light emitting device was formed in the same manner as in Example 8 except that the notch 32 was formed at the position 8.

In addition to the same effects as in Example 8, the following effects could be obtained. That is, of the light emitted from the fluorescent member 3, it is possible to control the light distribution, particularly up to the light that obliquely escapes from the light extraction surface 19, and it is possible to control the light distribution of all the light emitted from the fluorescent member 3. It became easier and the light could be effectively extracted in a predetermined direction. This embodiment is the most efficient as compared with the seventh and eighth embodiments.

(Embodiment 10) FIG. 28 shows the eighth aspect of the present invention.
2 shows a light emitting device according to the present invention. A light emitting device was formed in the same manner as in Example 1 except that silica aerogel was used as the low-refractive-index member 25, and this was placed on the inner surface of the recess 9 of the optical member 4 and then the fluorescent member 3 was filled.

In addition to obtaining the same effect as in Example 1, the convex lens shape of the light extraction surface 19 of the optical member 4 could be made gentler.

(Embodiment 11) FIG. 29 shows a ninth embodiment of the present invention.
2 shows a light emitting device according to the present invention. The optical member 4 is provided with a hemispherical recess 9 and the surface of the optical member 4 on the light emitting element 2 side (recess 9
Except for the above) and the surface of the fluorescent member 3 on the light emitting element 2 side are flush with each other, except that the fluorescent member 3 is filled in the recess 9 to form a light emitting device.

In addition to obtaining the same effects as in Example 1, color unevenness on the light extraction surface 19 could be suppressed by relaxing the color characteristics for each angle.

(Embodiment 12) Claim 1 of the present invention is shown in FIG.
0 shows a light-emitting device. Light extraction surface 19 of fluorescent member 3
Example 11 except that not only the side surface but also the surface of the fluorescent member 3 on the side of the light emitting element 2 is formed into a curved surface and the light emitting element 2 is mounted face down without forming the concave portion 6 on the mounting substrate 1. A light emitting device was formed in the same manner as in.

In addition to obtaining the same effects as in Example 11,
All of the periphery of the light emitting element 2 (excluding the surface on the mounting substrate 1 side) is surrounded by the fluorescent member 3, so that the lateral light emitted from the light emitting element 2 can easily enter the fluorescent member 3 and the luminous efficiency can be improved. Became even better.

(Embodiment 13) FIG. 31 shows the first aspect of the present invention.
1 shows a light emitting device according to 1. Example except that the fluorescent member 3 is applied to the inner surface of the recess 9 provided in the optical member 4 with a substantially uniform thickness, and the light emitting element 2 is mounted face down without forming the recess 6 in the mounting substrate 1. A light emitting device was formed in the same manner as in 1.

In addition to obtaining the same effects as in Example 1, most of the light emitted from the light emitting element 2 can be made incident on the fluorescent member 3 to convert the wavelength, and the light emitted from the light emitting element 2 can be converted. We were able to improve the utilization efficiency.

(Embodiment 14) FIG. 32 shows the claim 1 of the present invention.
2 shows a light emitting device according to 2. A light emitting device was formed in the same manner as in Example 1 except that the opening edge of the recess 9 of the optical member 4 and the opening edge of the recess 6 of the mounting substrate 1 were made to have substantially the same shape and the two were matched.

The same effects as in Example 1 were obtained, and the emission diameter of the fluorescent member 3 was not blurred, and the light distribution controllability was improved.

(Embodiment 15) FIG. 33 shows a first embodiment of the present invention.
The light-emitting device concerning 3 is shown. Example 1 except that the inner peripheral surface of the recessed portion 6 of the mounting substrate 1 was formed into a substantially parabolic shape, and aluminum was vapor-deposited on the inner peripheral surface to form a mirror-like reflective surface (not shown). A light emitting device was formed in the same manner.

In addition to obtaining the same effect as in Example 1, it was possible to obtain a large amount of light incident on the fluorescent member 3 and to suppress color unevenness on the light extraction surface 19.

If a surface emitting LED is used as the light emitting element 2, it is not necessary to form the inner peripheral surface of the recess 6 of the mounting substrate 1 into a substantially parabolic shape as shown in FIG. It was also confirmed that

(Embodiment 16) Claim 1 of the present invention is shown in FIG.
Another example of the light emitting device according to No. 3 is shown. A light emitting device was formed in the same manner as in Example 15 except that a three-dimensional substrate was used as the mounting substrate 1 and the light emitting element 2 was mounted on the mounting substrate 1 by flip chip mounting. In this embodiment, the wiring portion 18 is formed by forming the three-dimensional wiring portion 18 so as to cover most of the inner peripheral surface of the recess 6 of the mounting substrate 1.
Also has a role as the reflection part 23.

In addition to obtaining the same effects as in Example 15,
By using the three-dimensional substrate as the mounting substrate 1, both the wiring portion 18 and the reflection portion 23 can be formed at once on the inner peripheral surface of the recess 6, and the efficiency of forming the light emitting device can be increased.

(Embodiment 17) FIG. 35 shows the claim 1 of the present invention.
4 shows a light emitting device according to No. 4. A light emitting device was formed in the same manner as in Example 15 except that the inner peripheral surface of the recess 6 of the mounting substrate 1 was formed into a substantially elliptical shape.

In addition to obtaining the same effects as in Example 1, it was possible to obtain a large amount of light incident on the fluorescent member 3 and to make it a more point light source.

(Embodiment 18) FIG. 36 shows a first embodiment of the present invention.
5 shows a light emitting device according to No. 5. Without bringing the surface of the mounting substrate 1 on the optical member 4 side and the surface of the optical member 4 on the mounting substrate 1 side into close contact with each other,
A light emitting device was formed in the same manner as in Example 1 except that the mounting substrate 1 and the optical member 4 were separated from each other to form the gap 26.
Further, in this example, the light emitting device formed as described above was installed and accommodated on the bottom surface of the aluminum casing 33. The light extraction surface 19 of the light emitting device is visible from the outside of the housing 33 through the opening window 39 of the housing 33. Further, the side wall of the housing 33 has an intake port 34 and an exhaust port 35.
Was set up.

In addition to obtaining the same effects as those of the first embodiment, the intake port 34 and the gap 2 are formed as shown by the dotted arrows in FIG.
6, the air flow naturally occurs through the exhaust port 35,
The heat dissipation of the light emitting element 2 could be promoted.

(Embodiment 19) FIG. 37 shows a first embodiment of the present invention.
The other example of the light-emitting device concerning 5 is shown. Fan 3 in intake port 34
A light emitting device was formed in the same manner as in Example 18 except that 6 was installed. The fan 36 is shown in FIG.
7 is installed so that air can be sent from the outside of the housing 33 to the inside of the housing 33 when rotated as indicated by the solid arrow 7.

In addition to obtaining the same effects as in Example 18,
By rotating the fan 36, as shown by the dotted arrow in FIG. 37, the intake port 34, the gap portion 26, and the exhaust port 35.
By forcibly generating a flow of air through the through, heat dissipation of the light emitting element 2 could be further promoted.

(Embodiment 20) FIG. 38 shows the claim 1 of the present invention.
6 shows a light emitting device according to No. 6. After mounting the light emitting element 2 on the bottom surface of the recess 6 of the mounting substrate 1 by face down mounting,
A light emitting device was formed in the same manner as in Example 14 except that this was sealed with a translucent resin 27 that was a silicone resin.
The surface of the translucent resin 27 on the light extraction surface 19 side after sealing is formed in a hemispherical convex curved surface shape.

In addition to obtaining the same effects as in Example 14,
It was possible to increase the utilization efficiency of light from the light emitting element 2.

(Embodiment 21) FIG. 39 shows the first embodiment of the present invention.
7 shows a light emitting device according to No. 7. The antireflection film 28 is formed on the surface of the fluorescent member 3 on the light emitting element 2 side, and the light reflection film 37 is formed on the surface of the surface of the optical member on the mounting substrate 1 side where the antireflection film 28 is not formed. A light emitting device was formed in the same manner as in Example 1 except for the above. Here, the antireflection film 28
Is an optical multi-layer film made of a combination of SiO 2 film / TiO 2 film whose film thickness is controlled so that reflection to the light emitting device 2 side is minimized with respect to the wavelength of light emitted by the light emitting device 2. 10 layers were alternately used. Also,
The light reflecting film 37 was formed by performing aluminum vapor deposition.

In addition to the same effect as in Example 1, the light extraction efficiency of the light reflecting film 37 is increased.

(Embodiment 22) FIG. 40 shows the first aspect of the present invention.
8 shows a light emitting device according to No. 8. A light emitting device was formed in the same manner as in Example 1 except that the light diffusing material 29 was applied to the inner surface of the recess 9 of the optical member 4 and arranged, and then the fluorescent member 3 was filled. A light diffusing material 29 is arranged around the fluorescent member 3 except for the surface of the fluorescent member 3 on the light emitting element 2 side. Here, as the light diffusion material 29, SiO 2 having a size of about 1 to 2 μm is used.
Fine particles were used.

In addition to obtaining the same effects as in Example 1, the color characteristics for each angle were alleviated, and the color unevenness on the light extraction surface 19 could be suppressed.

The shapes of the fluorescent member 3 and the light diffusing material 29 are not limited to those shown in FIG. That is, in addition to the columnar shape and the rectangular parallelepiped shape, for example, as shown in FIG. 41, a hemispherical recess 9 is provided on the surface of the optical member 4 on the mounting substrate 1 side, and the light diffusing material 29 and the fluorescent member 3 are provided in the recess 9. By filling in this order, the shapes of the fluorescent member 3 and the light diffusing material 29 can be hemispherical. It was confirmed that the same effect as above can be obtained even in this way.

(Embodiment 23) FIG. 42 shows the first embodiment of the present invention.
9 shows a light emitting device according to No. 9. UV LED as the light emitting element 2
A light emitting device was formed in the same manner as in Example 1 except that 2a was used, the RGB light emitting phosphor 3a excited by ultraviolet rays was used as the fluorescent member 3, and transparent glass was used as the optical member 4.

It was confirmed that the same effects as in Example 1 were obtained and, even when the ultraviolet LED 2a was used as the light emitting element 2, the deterioration of the optical member 4 could be prevented.

[0143]

As described above, in the light emitting device according to the first aspect of the present invention, the light emitting element is mounted on the mounting substrate, and the light emitting element emits light having a wavelength different from the excitation wavelength while being excited by the light emission of the light emitting element. In the light emitting device formed with the fluorescent member, the fluorescent member is replaceable. Therefore, when the performance of the light emitting device is deteriorated due to deterioration of the fluorescent member, the mounting substrate is left as it is and the fluorescent member is not removed. The performance of the light emitting device can be restored and the life of the product can be extended by replacing it with a new one.

According to the second aspect of the present invention, since the optical member formed including the fluorescent member on the surface or inside is detachably attached to the mounting substrate on which the light emitting element is mounted, the deterioration of the fluorescent member may occur. When the performance of the light emitting device deteriorates, it is only necessary to replace the optical member with a new one, which can prolong the life of the product.

According to the third aspect of the present invention, the light emitting element is mounted on the mounting substrate by face down mounting, and the optical member is arranged opposite to the light emitting element. It becomes unnecessary, and it becomes possible to bring the fluorescent member such as a fluorescent material or a resin containing a fluorescent material closer to the light emitting element as long as it is not in contact with the light emitting element. Therefore, more accurate and effective light distribution control becomes possible. In addition, the loss of the light amount due to the shielding of a part of the light emission by the conductive wire does not occur, the amount of light incident on the fluorescent member is increased, and the light emission efficiency is improved.

Further, according to the invention of claim 4, since the fluorescent member is arranged at the position closest to the light emitting element in the optical member, the amount of light incident on the fluorescent member is increased and the luminous efficiency is improved. Is.

According to the fifth aspect of the invention, since the shape of the optical member is a convex lens shape, the light emitted from the fluorescent member can be controlled in a desired direction.

According to the invention of claim 6, among the light whose wavelength is converted by the fluorescent member, the light emitted in a direction different from the direction toward the light extraction surface of the optical member is totally emitted in the direction toward the light extraction surface. Since the optical member is formed so as to have the shape of reflecting light, the light emitted laterally from the fluorescent member can be effectively extracted to the outside, and the luminous efficiency is improved.

Further, according to the invention of claim 7, since the reflecting portion is provided on the surface of the optical member on the light emitting element side, and the opening portion for taking in light from the light emitting element is provided in the reflecting portion, All the light can be totally reflected by the reflecting portion, and thereby the light distribution can be controlled in a predetermined direction. Further, since the light is totally reflected by the reflecting portion, light that escapes to the mounting substrate side is eliminated, and the light emission efficiency is further improved. Further, since the reflecting portion is provided between the optical member and the mounting substrate, it cannot be easily touched, and deterioration and dirt can be reduced. Further, if it is an optical member, the reflecting portion can be easily provided.

According to the eighth aspect of the present invention, the optical member includes a low refractive index member having a lower refractive index than the optical member, and the light passing through the fluorescent member or the light whose wavelength is converted by the fluorescent member is a low refractive member. Since the low-refractive-index member is arranged so as to be incident on the optical member through the optical member, an interface of the low-refractive-index member is formed between the fluorescent member and the optical member, and the lens shape of the light extraction surface of the optical member is more gentle. Is something that can be.

According to the ninth aspect of the invention, since the fluorescent member is formed so that the light from the light emitting element passes through the fluorescent member with a substantially equal optical path length, the color angle characteristic can be suppressed. It is possible to reduce color unevenness on the light extraction surface.

According to the tenth aspect of the present invention, since at least one of the light extraction surface of the fluorescent member and the surface of the fluorescent member on the light emitting element side is formed into a curved surface, it is possible to suppress the color angle characteristic. It is possible to reduce color unevenness on the extraction surface.

According to the eleventh aspect of the invention, since the fluorescent member is arranged so as to substantially surround the light emitting element, the efficiency of light utilization from the light emitting element can be improved.

According to the twelfth aspect of the present invention, the light emitting element is mounted on the bottom surface of the concave portion provided in the mounting substrate, and the surface of the fluorescent member on the light emitting element side is formed to have a size substantially equal to the opening surface of the concave portion. Therefore, the emission diameter of the fluorescent member is not blurred, and the light distribution controllability is improved.

According to the thirteenth aspect of the present invention, the inner peripheral surface of the recess is formed in a substantially parabolic shape, and the light emitted from the light emitting element is reflected by the inner peripheral surface so that the light can enter the fluorescent member. Therefore, the light emission luminance distribution of the fluorescent member can be averaged and the color unevenness on the light extraction surface can be suppressed.

According to a fourteenth aspect of the present invention, the inner peripheral surface of the concave portion is formed into a substantially elliptical shape, and the light emitted from the light emitting element is reflected by the inner peripheral surface so that the light can enter the fluorescent member. Therefore, the central luminance of the emission luminance distribution of the fluorescent member becomes high, and the narrow-angle light distribution performance can be realized.

According to the fifteenth aspect of the invention, since the gap for heat dissipation is provided between the optical member and the mounting substrate, heat dissipation of the light emitting element can be promoted, and the life of the light emitting device is prolonged. Is something that can be done.

According to the sixteenth aspect of the present invention, the light emitting element is sealed with the transparent resin, and the light extraction surface side of the sealed transparent resin is formed into a curved shape. It is possible to improve the utilization efficiency of light from the.

According to a seventeenth aspect of the present invention, an antireflection film for reducing the light reflectance of the surface of the fluorescent member with respect to the light emitted from the light emitting element and increasing the incident amount into the fluorescent member is provided between the fluorescent member and the light emitting element. Since it is interposed between them, the amount of light incident on the fluorescent member is increased and the efficiency is improved.

In the eighteenth aspect of the invention, since the light diffusing material that scatters the light from the light emitting element or the fluorescent member is interposed between the fluorescent member and the optical member, the color angle characteristic can be suppressed. The color unevenness on the light extraction surface can be reduced.

According to the nineteenth aspect of the invention, since the optical member is formed by using the inorganic transparent material, the weather resistance of the optical member can be improved and the thermal expansion can be reduced. is there.

According to the twentieth aspect of the invention, a hemispherical dome formed of a transparent material including a fluorescent member is detachably attached to the mounting substrate so as to cover the light emitting element mounted on the mounting substrate. Therefore, when the performance of the light emitting device is deteriorated due to the deterioration of the fluorescent member, the dome only needs to be replaced with a new one, which can extend the life of the product. Moreover, in the present invention, since the dome including the fluorescent member is formed in a hemispherical shape, the distance from the light emitting element to the dome is substantially equal in any direction, and uneven color is prevented. It is a thing.

According to a twenty-first aspect of the invention, the light emitting element is placed in the recess formed in the mounting board, and the recess is filled with a fluorescent member, and the recess is formed by a detachable lid made of a transparent material. If the performance of the light emitting device deteriorates due to deterioration of the fluorescent member, the lid is removed and the deteriorated fluorescent member is replaced with an undeteriorated one.
It suffices to attach the lid again, which can prolong the life of the product. Moreover, in the present invention, since it is sufficient to fill the recess with the fluorescent member to such an extent that the light emitting element is hidden, the amount of the fluorescent member to be used can be small, and since only this small amount of the fluorescent member needs to be replaced, The manufacturing / replacement cost can be reduced, and since the parts mounted on the surface of the mounting board and the parts protruding from the surface of the mounting board are not required, the light emitting device can be made thinner. It is possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another example of the embodiment of the present invention.

FIG. 3 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 4 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 5 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 6 is a sectional view showing still another example of the embodiment of the present invention.

7A and 7B show still another example of the embodiment of the present invention, wherein FIG. 7A is a sectional view, and FIG. 7B is an enlarged sectional view of a portion surrounded by a dotted line in FIG. 7A.

8A and 8B show still another example of the embodiment of the present invention, wherein FIG. 8A is a sectional view, and FIG. 8B is an enlarged sectional view of a portion surrounded by a dotted line in FIG. 8A.

9A and 9B show still another example of the embodiment of the present invention, in which FIG. 9A is a sectional view, and FIG. 9B is an enlarged sectional view of a portion surrounded by a dotted line in FIG. 9A.

10A and 10B show still another example of the embodiment of the present invention, wherein FIG. 10A is a sectional view, and FIG. 10B is an enlarged sectional view of a portion surrounded by a dotted line in FIG. 10A.

FIG. 11 is an enlarged cross-sectional view showing still another example of the embodiment of the present invention.

FIG. 12 is an enlarged cross-sectional view showing still another example of the embodiment of the present invention.

FIG. 13 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 14 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 15 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 16 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 17 shows still another example of the embodiment of the present invention, in which (a) and (b) are sectional views.

FIG. 18 is a sectional view showing still another example of the embodiment of the present invention.

FIG. 19 is a cross-sectional view showing the first embodiment of the present invention.

FIG. 20 is a cross-sectional view showing a second embodiment of the present invention.

FIG. 21 is a sectional view showing Embodiment 3 of the present invention.

FIG. 22 is a sectional view showing Embodiment 4 of the present invention.

FIG. 23 is a sectional view showing Embodiment 5 of the present invention.

FIG. 24 is a sectional view showing Embodiment 6 of the present invention.

FIG. 25 is a sectional view showing Embodiment 7 of the present invention.

FIG. 26 is a sectional view showing Embodiment 8 of the present invention.

FIG. 27 is a sectional view showing Embodiment 9 of the present invention.

FIG. 28 is a sectional view showing Embodiment 10 of the present invention.

FIG. 29 shows Example 11 of the present invention,
(A) is sectional drawing, (b) is sectional drawing which expanded the part enclosed with the dotted line in (a).

FIG. 30 shows Example 12 of the present invention,
(A) is sectional drawing, (b) is sectional drawing which expanded the part enclosed with the dotted line in (a).

FIG. 31 shows Example 13 of the present invention,
(A) is sectional drawing, (b) is sectional drawing which expanded the part enclosed with the dotted line in (a).

FIG. 32 shows Example 14 of the present invention,
(A) is sectional drawing, (b) is sectional drawing which expanded the part enclosed with the dotted line in (a).

FIG. 33 is a sectional view showing Embodiment 15 of the present invention.

FIG. 34 shows Example 16 of the present invention,
(A) is sectional drawing of a mounting substrate, (b) is a top view of a mounting substrate.

FIG. 35 is a sectional view showing Embodiment 17 of the present invention.

FIG. 36 is a sectional view showing Embodiment 18 of the present invention.

FIG. 37 is a sectional view showing Embodiment 19 of the present invention.

FIG. 38 is a sectional view showing Embodiment 20 of the present invention.

FIG. 39 is a sectional view showing Embodiment 21 of the present invention.

FIG. 40 is a sectional view showing Embodiment 22 of the present invention.

FIG. 41 is a sectional view showing another example of Example 22 of the present invention.

FIG. 42 is a sectional view showing Embodiment 23 of the present invention.

FIG. 43 shows a conventional example, (a) is a cross-sectional view of the light-emitting diode after the cap is attached, and (b) is a cross-sectional view of the light-emitting diode before the cap is attached.

[Explanation of symbols]

1 Mounting board 2 light emitting element 3 Fluorescent material 4 Optical members 5 dome 6 recess 7 lid 19 Light extraction surface 23 Reflector 24 opening 25 Low refraction member 26 Gap 27 Translucent resin 28 Antireflection film 29 Light diffusing material

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadashi Murakami             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Masaru Sugimoto             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Eiji Shiohama             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Hideyoshi Kimura             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Takuma Hashimoto             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Koji Nishioka             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F term (reference) 5F041 AA11 AA44 DA03 DA04 DA12                       DA13 DA19 DA20 DA34 DA35                       DA36 DA74 DA75 DA77 DA78                       EE21 FF01 FF11

Claims (21)

[Claims]
1. A light emitting device formed by mounting a light emitting element on a mounting substrate and including a fluorescent member that is excited by the light emission of the light emitting element and emits light having a wavelength different from an excitation wavelength. A light-emitting device characterized by being replaceable.
2. The light emitting device according to claim 1, wherein an optical member including a fluorescent member is detachably mounted on a surface or inside of a mounting substrate on which the light emitting element is mounted. .
3. The light emitting device according to claim 1, wherein the light emitting element is mounted on the mounting substrate by face-down mounting, and the light emitting element and the optical member are arranged to face each other.
4. The light emitting device according to claim 2, wherein the fluorescent member is arranged at a position closest to the light emitting element in the optical member.
5. The light emitting device according to claim 2, wherein the shape of the optical member is a convex lens shape.
6. A shape for total reflection of light emitted in a direction different from the direction toward the light extraction surface of the optical member, out of the light emitted after the wavelength is converted by the fluorescent member, in the direction toward the light extraction surface. The light emitting device according to claim 2, wherein an optical member is formed so that
7. The light emitting element side surface of the optical member is provided with a reflecting portion, and the reflecting portion is provided with an opening portion for taking in light from the light emitting element. The light-emitting device according to claim 1.
8. The optical member comprises a low-refractive member having a lower refractive index than the optical member, and light passing through the fluorescent member or light whose wavelength is converted by the fluorescent member is transferred to the optical member via the low-refractive member. 8. The light emitting device according to claim 2, further comprising a low refraction member arranged so as to be incident.
9. The light emitting device according to claim 1, wherein the fluorescent member is formed so that light from the light emitting element passes through the fluorescent member with substantially equal optical path lengths. .
10. The light emitting device according to claim 9, wherein at least one of the light extraction surface side of the fluorescent member and the light emitting element side surface of the fluorescent member is formed into a curved surface.
11. The light emitting device according to claim 1, wherein a fluorescent member is arranged so as to substantially surround the light emitting element.
12. A light emitting element is mounted on the bottom surface of a recessed portion provided in a mounting substrate, and a surface of the fluorescent member on the light emitting element side is formed to have a size substantially equal to an opening surface of the recessed portion. The light emitting device according to any one of claims 1 to 11.
13. The inner peripheral surface of the concave portion is formed into a substantially parabolic shape, and the light emitted from the light emitting element is reflected by the inner peripheral surface so that the light can be incident on the fluorescent member. The light emitting device according to claim 12.
14. The inner peripheral surface of the concave portion is formed into a substantially elliptical shape, and the light emitted from the light emitting element is reflected by the inner peripheral surface so that the light can enter the fluorescent member. The light emitting device according to claim 12.
15. The light emitting device according to claim 2, wherein a gap portion for heat dissipation is provided between the optical member and the mounting substrate.
16. The light-emitting element is sealed with a translucent resin, and the surface of the sealed translucent resin on the light extraction surface side is formed into a curved shape.
6. The light emitting device according to any one of 5 above.
17. An antireflection film, which reduces the light reflectance of the surface of the fluorescent member against the light emitted from the light emitting element and increases the amount of light incident on the fluorescent member, is interposed between the fluorescent member and the light emitting element. The light emitting device according to claim 1, wherein the light emitting device is a light emitting device.
18. The light diffusing material that scatters light from the light emitting element or the fluorescent member is interposed between the fluorescent member and the optical member, according to claim 2. Light emitting device.
19. The light emitting device according to claim 2, wherein the optical member is formed by using an inorganic transparent material.
20. A hemispherical dome formed of a transparent material including a fluorescent member is detachably mounted on the mounting substrate so as to cover the light emitting element mounted on the mounting substrate. The light emitting device according to claim 1.
21. A light emitting element is placed in a recess formed in a mounting board, the recess is filled with a fluorescent member, and the recess is sealed with a detachable lid made of a transparent material. The light emitting device according to claim 1.
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