JP2003158302A - Light emitting diode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a high external emission efficiency in an LED wherein its thin structure creates a good appearance and enables a single LED to irradi ate a large area. SOLUTION: A portion of the light emitted by a light emitting element 6 is directed to the upper surface 9 serving as reflector for an LED 2 and, because it lands there at a great angle of incidence, is totally reflected to travel to a side surface 10. Since the upper surface 9 assumes a shape formed when a part of a parabola with its focal point at the element 6 is rotated on the Z-axis, the whole light reflected by the upper surface 9 proceeds in parallel to the X-Y plane. Since the side surface 10 is a part of a spherical surface with its center at the element 6, the light as is proceeds in parallel, to be emitted in 360 deg. directions at the Z-axis. Furthermore, the light from the element 6 directly arriving on the side surface 10, which is a part of the spherical surface as stated above, is emitted without being refracted. All the light is emitted upward thanks to the ladder-shaped peripheral reflector surrounding the LED 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode (hereinafter, also abbreviated as "LED") used as a light source for an LED light applied to a lighting device such as a vehicle light, a display device and the like.

In the present specification, the LED chip itself is called a "light emitting element", and the entire light emitting device including an optical device such as a package resin or a lens system on which the LED chip is mounted is referred to as a "light emitting diode" or "LED". ". Further, an illuminating device such as a vehicle-mounted light using an LED as a light source, a display device and the like will be referred to as an "LED light".

[0003]

2. Description of the Related Art With the increase in brightness of light-emitting elements, LED lights having LEDs as light sources have been increasingly used in automobile backlights and the like. LEDs have a sharp spectrum and good visibility. Further, since the response speed is fast, the signal transmission speed to the following vehicle is fast, and it is recognized that the stationary distance is shortened during high speed running. Furthermore, L
Since the ED itself is a monochromatic light source, it is not necessary to filter out light other than the necessary colors like an incandescent light bulb, and it is highly efficient as a monochromatic light source, leading to energy saving.

An example of such an LED light is shown in FIG.
FIG. 8: is sectional drawing which shows the whole structure of an example of the conventional LED light.

As shown in FIG. 8, the LED light 100 uses a lens type LED 101 in which a light emitting element 102 is sealed in a convex lens shape with a transparent epoxy resin 105 as a light source. In the lens type LED 101, the light emitting element 1 is attached to the lead 103a of the pair of leads 103a and 103b.
02 is mounted, and the light emitting element 102 and the lead 103b are mounted.
Are bonded with a wire 104, and the whole is sealed with a transparent epoxy resin 105 in a convex lens shape. Then, the convex lens type LED 101 is covered with a rotating parabolic reflector 106, and the Fresnel lens 1 is provided at the upper center.
07 is formed, and eventually the light emitted from the lens type LED 101 is reflected by the reflecting mirror 106 or condensed by the Fresnel lens 107, and is all emitted substantially parallel upward. Then, the light that has been spread by the interface of the unevenness provided on the lower surface of the resin lens 109 and transmitted through the resin lens 109 is externally radiated as radiated light having a spread of about 20 degrees which is the standard of the vehicle-mounted backlight. .

[0006]

However, as the output of the light emitting element is further improved, it is necessary to emit light from a light emitting area having a predetermined area with a small number of light emitting elements. This is to reduce the number of components and the labor of component mounting. However, the above-mentioned convex lens type LED 1
In the LED light 100 using 01, if one light emitting element is intended to emit light over a larger area, the light emitting element becomes similar in shape, becomes larger in the area direction, and becomes thicker in the thickness direction. Also, if the film is forcibly thinned, the appearance will be degraded. Therefore, there is a problem that the thin light source, which is a feature of the LED, cannot be used. Further, the Fresnel lens 107 is provided from the light emitting element 102 to the reflecting mirror 106.
Light that does not reach this level cannot be optically controlled and cannot be externally radiated, so there was still a problem in terms of external radiation efficiency.

Therefore, the present invention is a light source for an LED light, which can illuminate a large area with one light emitting element with good appearance while making the most of the characteristic of LED, that is, a thin light emitting element. It is an object to provide LEDs.

[0008]

A light emitting diode according to the invention of claim 1 reflects a light emitting element and light from the light emitting element provided above the light emitting element without laterally spreading the light in the vertical direction. And a first reflecting mirror that does this.

Thus, the first reflecting mirror for reflecting the light without spreading in the vertical direction in the side surface direction is installed directly above the light emitting element, and the peripheral reflecting mirror for reflecting the reflected light upward is LE.
By arranging it around D, it is possible to obtain external emission light having a large area as the peripheral reflecting mirror is separated from the first reflecting mirror. Further, since the light reflected in the side surface direction is reflected without spreading in the vertical direction, it is possible to reduce the thickness of the peripheral reflecting mirror that reflects this reflected light upward. Further, all the light reflected on the side surface is optically controlled, reflected upward, and radiated to the outside, so that high external radiation efficiency can be obtained.

In this way, taking advantage of the thinness which is a feature of the LED, it is possible to illuminate a large area with one thin light emitting element and to obtain high external emission efficiency for the LED light. It becomes a light emitting diode.

A light emitting diode according to a second aspect of the present invention comprises a light emitting element, an electric system for supplying electric power to the light emitting element, and a light transmissive material for sealing the light emitting element and the electric system. A reflective surface that reflects the light emitted from the light emitting element in the vertical direction by the light transmissive material and reflects the light in the side direction, and a side surface that radiates the light reflected in the lateral direction to the outside without expanding the light in the vertical direction. The radiating surface is molded.

That is, the light emitted from the light emitting element is manufactured so that it is incident on the reflection surface, which is the upper surface of the light transmissive material encapsulating the light emitting element, at an angle larger than the critical angle. This eliminates the need for surface treatment such as plating and vapor deposition for manufacturing the LED reflecting mirror, and only needs to adjust the shape of the sealing mold, which significantly shortens the manufacturing process of the light emitting diode and reduces the manufacturing cost. Cost is reduced.
In addition, the side surface of the light-transmissive material allows the light reflected in the side direction to be emitted to the outside without spreading in the vertical direction, so that the side surface is directly transmitted to the side surface and is reflected upward by the peripheral reflector outside the LED. To be done. by this,
Since the light emitted from the light emitting element to the upper and side surfaces of the light transmissive material is reflected upward by the peripheral reflecting mirror,
L, which has high external radiation efficiency while taking advantage of the thin LED characteristics
It becomes a light emitting diode suitable for ED light.

According to a third aspect of the present invention, in the light emitting diode according to the second aspect, the reflecting surface has a part of a parabola which is a symmetry axis having the light emitting element as a focal point and being orthogonal to a central axis of the light emitting element. It has a shape rotated around the central axis of the light emitting element.

As a result, in addition to the effect described in claim 2, all the light emitted from the light emitting element and impinging on any part of the reflecting surface is directed in a lateral direction substantially perpendicular to the central axis of the light emitting element. Is totally reflected. As a result, all the light reflected by the reflecting surface is reflected in the lateral direction without spreading in the vertical direction, so that the thickness of the peripheral reflecting mirror outside the LED can be reduced.

In this way, by taking advantage of the thinness which is a feature of the LED, it is possible to illuminate a large area with one thin light emitting element and to obtain a high external emission efficiency for an LED light. It becomes a light emitting diode.

A light emitting diode according to a fourth aspect of the present invention is the light emitting diode according to any one of the first to third aspects, wherein the light emitting element is mounted on a circuit board on a metal plate.

In addition to the effect according to any one of claims 1 to 3, since the light emitting element is mounted on the metal plate having excellent thermal conductivity as described above, the heat dissipation is significantly improved. Since there is no thermal saturation even when a large current is applied to the light emitting element, a large light output can be obtained.
In this way, according to the light emitting diode of the present invention, the LE is thin and has a large heat dissipation property, a large light output can be obtained without being limited by thermal saturation, and a bright radiant light can be obtained.
It becomes D light.

A light emitting diode according to a fifth aspect of the present invention is the light emitting diode according to any one of the first to fourth aspects, in which light emitted to the side of the light emitting element in the vicinity of the light emitting element is reflected upward. A second reflecting mirror is provided.

As a result, in addition to the effect according to any one of claims 1 to 4, in the LED according to the invention of claim 1, light is emitted only right above the light emitting element. On the other hand, light is emitted upward from the periphery of the light emitting element, and it seems that the entire device emits light, and the appearance is improved.

According to a sixth aspect of the present invention, in the light emitting diode according to any one of the first to fifth aspects, the upper surface of the first reflecting mirror or the sealing surface is 60 degrees with respect to the central axis. It reflects light in the above range.

Thereby, in addition to the effect according to any one of claims 1 to 5, all light emitted within a range of 60 degrees from the central axis of the upper surface of the light emitting element is subjected to the first reflection. Light reflected laterally on the upper surface of the mirror or the sealing surface and emitted within a range of more than 60 degrees from the central axis is directed directly to the lateral direction, and both are reflected upward by the peripheral reflecting mirror. Therefore, most of the light emitted from the light emitting element is externally emitted from the LED light, so that the LED for LED light has extremely high external emission efficiency.

[0022]

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

First Embodiment First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is an LE according to the first embodiment of the present invention.
It is a longitudinal cross-sectional view showing the overall configuration of D. FIG. 2A is a plan view showing an overall configuration of an LED light using the LED according to the first embodiment of the present invention, FIG. 2B is a sectional view taken along line AA of FIG. 2A, and FIG. It is an enlarged view of P part of FIG.

First, the structure of the LED 2 of the first embodiment will be described with reference to FIG. Here, the central axis of the light emitting element is the Z axis, and the top surface of the light emitting element is the origin thereof, and the X axis and the Y axis intersect at a right angle at this origin. The same applies to each of the following embodiments.

As shown in FIG. 1, the light emitting element 6 is mounted on the tip of the lead plate 5a having a large area among the pair of lead plates 5a and 5b provided on the XY plane. The electrode on the upper surface of the light emitting element 6 and the tip of the lead plate 5b are bonded by a wire 7 to be electrically connected.
The tips of the lead plates 5a and 5b as the electric system, the light emitting element 6, and the wire 7 are set in a resin sealing mold,
A transparent epoxy resin 8 as a light transmissive material is resin-sealed in a cross-sectional shape as shown in the figure. Where L
There is a flat surface in the central portion of the upper surface 9 of the ED 2 and, following this flat surface, one of the parabola having the center of the light emitting surface of the light emitting element 6 as the first reflecting mirror and the symmetry axis in the X axis direction. It has an umbrella-like shape in which the part (range of 60 degrees with respect to the Z axis) is rotated around the Z axis. Also, the side surface 1 of the LED 2
0 forms a part of a spherical surface centered on the light emitting element 6.

That is, in the LED 2 of the first embodiment, the transparent epoxy resin 8 as the light transmissive material reflects the light emitted from the light emitting element 6 in the lateral direction without spreading the light in the vertical direction. 9 and a side emission surface 10 that emits the light reflected in the side direction to the outside without spreading the light in the vertical direction are molded.

Next, as shown in FIG. 2, an LED light 1 using the LED 2 of the first embodiment has a circular main body on which the LED 2 serving as a light source is mounted, and the periphery thereof is used as a peripheral reflecting mirror. It has a structure surrounded by a concentric stepped reflecting mirror 3. As shown in FIG. 2C, the reflecting surface 3a of the reflecting mirror 3 is inclined at about 45 degrees with respect to the XY plane in the figure. The reflecting mirror 3 is formed of a transparent acrylic resin and then vapor-deposited with aluminum to form a reflecting surface.

The way in which the LED light 1 having such a structure shines will be described with reference to FIGS. LED2
When a voltage is applied to the lead plates 5a and 5b to illuminate the light emitting element 6, the light emitted from the light emitting element 6 in the Z direction,
That is, the light heading directly above passes through the transparent epoxy resin 8 as it is, goes straight, passes through a transparent front plate (not shown) which is covered on the LED light 1, and is emitted to the outside. Further, among the light emitted from the light emitting element 6, light within a range of 60 degrees or more with respect to the Z axis reaches the upper surface 9 as the first reflecting mirror, and all of these lights have a large incident angle, so that all of them are totally incident. It is reflected and goes to the side surface 10. Here, since the upper surface 9 has a shape in which a part of a parabola having the light emitting element 6 as the focal point and the X axis as the axis of symmetry is rotated around the Z axis, all the light reflected by the upper surface 9 is X−. Since the light travels in parallel to the Y plane and the side surface 10 forms a part of a spherical surface centered on the light emitting element 6, light travels substantially in parallel and is emitted in a substantially planar shape in the direction of 360 degrees around the Z axis. . Further, from the light emitting element 6 to the side surface 1
Since the side surface 10 forms a part of a spherical surface centering on the light emitting element 6, the light directly directed to 0 is emitted in the same direction without refraction.

A staircase-shaped reflecting mirror 3 as a peripheral reflecting mirror is located ahead of it, and a reflecting surface 3a having an inclination of about 45 degrees is reflected, but is reflected by the upper surface 9 and proceeds substantially parallel to the XY plane. Since the light directly emitted from the side surface 10 including the generated light is also close to parallel to the XY plane, the light reflected by the reflecting surface 3a travels almost vertically and goes upward, and at least 20 from the Z axis. Within a range of degrees, it is radiated to the outside through a transparent front plate (not shown). Note that the light described as “parallel” in the above is not perfectly parallel because of the size of the light-emitting element 6, but all the light is substantially parallel and at least within a range of 20 degrees from the Z axis. It will surely come in.

In this way, the LED of the first embodiment is
2 takes advantage of the thinness which is the feature of LED,
It is thin and can illuminate a large area with one light emitting element.
The light source is suitable for the LED light 1 that can obtain high external radiation efficiency.

Second Embodiment Next, an LED according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a vertical cross-sectional view showing the overall configuration of the LED according to the second embodiment of the present invention.

As shown in FIG. 3, in the LED 11 of the second embodiment, the pair of lead plates 12a and 12b are recessed only around the light emitting element 6 to form a second reflecting mirror. As a result, in the basic form of FIG. 1, light is directly emitted only directly above the light emitting element 6, whereas light is emitted upward from the periphery of the light emitting element 6 in the LED 11. It is possible to obtain the effect that the whole looks like emitting light and the appearance is improved.

Third Embodiment Next, an LED according to the third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a vertical cross-sectional view showing the overall structure of the LED according to the third embodiment of the present invention.

In the LED 16 of the third embodiment,
The pair of lead plates 13a and 13b are subjected to the second etching as shown in FIG. 4 by half etching or stamping pattern.
By providing a pattern as a reflecting mirror of the above, the light emitted obliquely downward from the light emitting element 6 is reflected and the light is emitted upward. By forming a plurality of concentric reflecting mirrors in this manner, it is possible to make the whole look like emitting light as in the second embodiment, and to improve the appearance. In this case, the adhesive area between the transparent epoxy resin 8 and the lead plates 13a and 13b is increased, and the effect of reducing the peeling defect can be obtained at the same time by eliminating the adhesive shape from the planar shape. Particularly, it is effective in the case of a large current type that generates a large amount of heat.

Fourth Embodiment Next, an LED according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram showing a side surface shape of an LED according to the fourth embodiment of the present invention.

In the LED 17 of the fourth embodiment,
As shown in FIG. 5, the side shape of the sealed portion of the LED 17 made of the transparent epoxy resin 8 is changed. The side surface 10 of the LED 2 of the first embodiment is a part of a spherical shape centered on the light emitting element 6, and the light emitted from the light emitting element 6 is the side surface 10.
Although the light is incident substantially vertically on the light source and goes straight as it is, in the third modification, the side surface 14 forms a part of an ellipsoidal surface having the light emitting element 6 as one focal point, and the light emitting element 6 is Light emitted from the side surface 14 is slightly refracted downward in the straight direction. Therefore, even when the staircase-shaped reflecting mirror 3 around the LED 2 is moved to a lower position, the LED light has high external radiation efficiency. by this,
The LED becomes an LED that can be made thinner.

Fifth Embodiment Next, an LED according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a partially enlarged view showing the upper surface of the LED according to the fifth embodiment of the present invention.

In the LED 18 of the fifth embodiment,
As shown in FIG. 6, a part of a parabola whose focal point is the light emitting element 6 up to the central portion of the upper surface 9 is rotated around the Z axis. Then, the upper surface 9 as the reflecting mirror of the LED is laterally reflected by plating on the upper surface 9 regardless of the total reflection at the boundary surface between the transparent epoxy resin 8 and the air.
The metal reflection film 15 is attached by vapor deposition or the like. As a result, including the light emitted directly from the light emitting element 6,
It becomes an LED that emits almost all the luminous flux emitted from the light emitting element 6 to the side surface.

Comparative Example Here, a comparative example with each of the embodiments of the present invention will be described with reference to FIG. FIG. 7 is a vertical cross-sectional view showing the overall configuration of an LED according to a comparative example with each embodiment of the present invention.

As shown in FIG. 7, the LED of this comparative example
In the reference numeral 31, the light emitting element 34 is mounted on the tip of the lead plate 33a of the pair of lead plates 33a and 33b, and the electrode on the upper surface of the light emitting element 34 and the tip of the lead plate 33b are connected to the wire 3.
Bonding is performed at 5 to make an electrical connection. The tip ends of the lead plates 33a and 33b as the electric system,
The light emitting element 34 and the wire 35 are sealed with a transparent epoxy resin 36 as a light transmissive material. The outer shape of the transparent epoxy resin 36 is a spherical half (convex lens shape) with the light emitting element 34 as the center, and the upper part of the spherical shape is cut into a conical shape. In this case, the light emitted from the light emitting element 34 is almost totally reflected by the upper surface 32, but the reflected light corresponds to the emitted light from the mirror point of the light emitting element 34 with respect to the upper surface 32. Rather, it has a flank 37
Emitted from. Therefore, a circular step-shaped reflecting mirror as a peripheral reflecting mirror that reflects these lights upward is also required to be longer in the Z direction than the LED 2 used in the first embodiment.

Thus, the LED 31 according to this comparative example
In the above, since the LED light cannot be made thin and the external radiation efficiency cannot be increased, the object of the present invention cannot be achieved.

In each of the above-mentioned embodiments, the transparent epoxy resin is mainly used as the light-transmitting material for sealing the light emitting element and the like, but other light-transmitting materials may be used.

In each of the above embodiments, the light emitting element is mounted on one of the pair of lead plates, but it may be mounted on the circuit board on the metal plate. By mounting the light emitting element on a metal plate with excellent thermal conductivity in this way, heat dissipation is greatly improved, and thermal saturation does not occur even when a large current is applied to the light emitting element, resulting in a large light output. Has the advantage that

The configuration, shape, quantity, material, size, connection relationship, etc. of the other parts of the light emitting diode are not limited to those in the above-mentioned respective embodiments.

[0046]

As described above, in the light emitting diode according to the invention of claim 1, the light emitting element and the light from the light emitting element provided above the light emitting element are spread in the vertical direction in the lateral direction. And a first reflecting mirror that reflects without reflection.

Thus, the first reflecting mirror that reflects the light without expanding in the vertical direction in the side direction is installed directly above the light emitting element, and the peripheral reflecting mirror that reflects the reflected light upward is LE.
By arranging it around D, it is possible to obtain external emission light having a large area as the peripheral reflecting mirror is separated from the first reflecting mirror. Further, since the light reflected in the side surface direction is reflected without spreading in the vertical direction, it is possible to reduce the thickness of the peripheral reflecting mirror that reflects this reflected light upward. Further, all the light reflected on the side surface is optically controlled, reflected upward, and radiated to the outside, so that high external radiation efficiency can be obtained.

In this way, by taking advantage of the thinness which is a feature of the LED, it is possible to illuminate a large area with one thin light emitting element and to obtain high external radiation efficiency for an LED light. It becomes a light emitting diode.

A light emitting diode according to the invention of claim 2 comprises a light emitting element, an electric system for supplying electric power to the light emitting element, and a light transmissive material for sealing the light emitting element and the electric system. A reflective surface that reflects the light emitted from the light emitting element in the vertical direction by the light transmissive material and reflects the light in the side direction, and a side surface that radiates the light reflected in the lateral direction to the outside without expanding the light in the vertical direction. The radiating surface is molded.

That is, it is manufactured so that the light emitted from the light emitting element is incident on the reflection surface, which is the upper surface of the light transmissive material sealing the light emitting element, at an angle larger than the critical angle. This eliminates the need for surface treatment such as plating and vapor deposition for manufacturing the LED reflecting mirror, and only needs to adjust the shape of the sealing mold, which significantly shortens the manufacturing process of the light emitting diode and reduces the manufacturing cost. Cost is reduced.
In addition, the side surface of the light-transmissive material allows the light reflected in the side direction to be emitted to the outside without spreading in the vertical direction, so that the side surface is directly transmitted to the side surface and is reflected upward by the peripheral reflector outside the LED. To be done. by this,
Since the light emitted from the light emitting element to the upper and side surfaces of the light transmissive material is reflected upward by the peripheral reflecting mirror,
L, which has high external radiation efficiency while taking advantage of the thin LED characteristics
It becomes a light emitting diode suitable for ED light.

According to a third aspect of the present invention, in the light emitting diode according to the second aspect, the reflecting surface has a part of a parabola which is an axis of symmetry with the light emitting element as a focal point and being orthogonal to a central axis of the light emitting element. It has a shape rotated around the central axis of the light emitting element.

As a result, all the light emitted from the light emitting element and hitting any part of the reflecting surface is totally reflected in the side surface direction substantially perpendicular to the central axis of the light emitting element. As a result, all the light reflected by the reflecting surface is reflected in the lateral direction without spreading in the vertical direction, so that the thickness of the peripheral reflecting mirror outside the LED can be reduced.

In this way, by taking advantage of the thinness which is a feature of the LED, it is possible to illuminate a large area with one thin light emitting element and to obtain high external radiation efficiency for an LED light. It becomes a light emitting diode.

A light emitting diode according to a fourth aspect of the present invention is the light emitting diode according to any one of the first to third aspects, wherein the light emitting element is mounted on a circuit board on a metal plate.

Since the light emitting element is mounted on the metal plate having excellent thermal conductivity as described above, the heat dissipation is greatly improved, and thermal saturation does not occur even when a large current is applied to the light emitting element. However, there is an advantage that a large light output can be obtained. In this way, according to the light emitting diode of the present invention, the LED light is thin and has a large heat dissipation property, a large light output can be obtained without being restricted by thermal saturation, and a bright radiant light can be obtained.

A light emitting diode according to a fifth aspect of the present invention is the light emitting diode according to any one of the first to fourth aspects, in which light emitted to the side of the light emitting element in the vicinity of the light emitting element is reflected upward. A second reflecting mirror is provided.

As a result, L according to the invention of claim 1
In the ED, light is radiated upward only just above the light emitting element, whereas light is also radiated upward from the periphery of the light emitting element, and it seems that the whole is emitting light. The effect of improving the appearance is obtained.

According to a sixth aspect of the present invention, in the light emitting diode according to any one of the first to fifth aspects, the upper surface of the first reflecting mirror or the sealing surface is 60 degrees with respect to the central axis. It reflects light in the above range.

As a result, all the light emitted within a range of 60 degrees from the central axis of the upper surface of the light emitting element is reflected in the side direction by the first reflecting mirror or the upper surface of the sealing surface, and 60 degrees from the central axis. Light emitted in the larger range is directed laterally and is reflected upward by the peripheral reflectors. Therefore, most of the light emitted from the light emitting element is externally emitted from the LED light, so that the LED for LED light has extremely high external emission efficiency.

[Brief description of drawings]

FIG. 1 is an LED according to a first embodiment of the present invention.
FIG. 3 is a vertical sectional view showing the overall configuration of

FIG. 2 (a) is a plan view showing the overall configuration of an LED light using the LED according to the first embodiment of the present invention,
(B) is an AA sectional view of (a), and (c) is an enlarged view of a portion P of (b).

FIG. 3 is an LED according to a second embodiment of the present invention.
FIG. 3 is a vertical sectional view showing the overall configuration of

FIG. 4 is an LED according to a third embodiment of the present invention.
FIG. 3 is a vertical sectional view showing the overall configuration of

FIG. 5 is an LED according to a fourth embodiment of the present invention.
It is explanatory drawing which shows the side surface shape.

FIG. 6 is an LED according to a fifth embodiment of the present invention.
3 is a partially enlarged view showing the upper surface of FIG.

FIG. 7 is a vertical cross-sectional view showing an overall configuration of an LED according to a comparative example with each embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an overall configuration of an example of a conventional LED light.

[Explanation of symbols]

2,11,16,17,18 Light emitting diode (LE
D) 5a, 5b, 7, 12a, 12b, 13a, 13b Electric system 6 Light emitting element 8 Light transmitting material 9 First reflecting mirror 15 Metal surface

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F21Q 1/00 N (72) Inventor Toshinori Takahashi 1st Nagachihata, Ochiai, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. In-house (72) Inventor Hisatoshi Ohta 1 Ochiai, Nagachiba, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture F-term (Toyoda Gosei Co., Ltd.) 3K080 AA01 AB01 BA07 BB02 BC02 BC09 BD01 BE07 5F041 AA42 AA47 DA17 DA26 DA33 DA34 DA44 DA57 FF01 FF11 FF16

Claims (6)

[Claims] 1. A light emitting diode comprising: a light emitting element; and a first reflecting mirror provided above the light emitting element, which reflects the light from the light emitting element only in a side direction without spreading the light in a vertical direction. 2. A light emitting device, an electric system for supplying electric power to the light emitting device, and a light transmissive material for sealing the light emitting device and the electric system, wherein the light transmissive material is used for the light emitting device. Light emission in which a reflection surface that reflects the light emitted from the side surface without being spread in the vertical direction and a side surface emitting surface that emits the light reflected in the side surface to the outside without being spread in the vertical direction is molded. diode. 3. The reflecting surface has a shape in which a part of a parabola, which is a symmetry axis orthogonal to the central axis of the light emitting element, is rotated about the central axis of the light emitting element with the light emitting element as a focal point. The light emitting diode according to claim 2. 4. The light emitting device is mounted on a circuit board on a metal plate.
The light emitting diode according to any one of 1. 5. The second reflecting mirror for reflecting light emitted to the side of the light emitting element upward is provided in the vicinity of the light emitting element. The light emitting diode described in 1. 6. The first reflecting mirror or the reflecting surface reflects light in a range of 60 degrees or more with respect to a central axis, according to any one of claims 1 to 5. Light emitting diode.