JP2003282958A - Diode emitter and light-emitting device employing the diode emitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that in a conventional bullet type high- luminance LED packaging, light beams, among those radiated from a light- emitting diode, which are incident on a cylindrical portion, are led to unspecified directions or totally reflected by the surface thereof and cannot be utilized, while those incident on a lens portion are collected and enhanced in light intensity. <P>SOLUTION: The diode emitter (A) is provided with the light-emitting diode (1), a lead frame (2) therefor, and a packaging (3) for incorporating the both therein. The packaging (3) is constituted of a base portion (4) at a lead frame side, a spherical portion (6) extending to the base portion (4), whose center (C) resides in the central portion of the light-emitting diode (1), and an aspherical lens portion (7) which protrudes outward from the spherical portion (6), being on an optical axis (R) of the light-emitting diode (1). A light-emitting device has such an arrangement wherein the diode emitter (A) is enclosed by a rectangular or circular mirror reflector (21) having a paraboloidal surface (22) whose focal point (F) resides in the luminous central portion of the diode emitter (A). <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diode light emitter and a light emitter using the diode light emitter.

[0002]

2. Description of the Related Art A conventional high brightness LED is shown in FIG. The packaging 33 including the light emitting diode (light emitting portion pellet) 31 and the lead frame 32 has a simple shell shape, and collects the light flux emitted from the light emitting diode 31 as much as possible in the direction of the central optical axis X. The leading portion 34 forms a lens so as to increase the luminous intensity.

[0003]

In the case of such packaging, of the luminous flux emitted from the light emitting diode, the luminous flux incident on the lens portion is well condensed and contributes to increase the luminous intensity. The light beam radiated toward the cylindrical portion other than the portion is directed in an unspecified direction or causes total reflection on the surface, which makes it difficult to effectively utilize the light. SUMMARY OF THE INVENTION It is an object of the present invention to provide a diode light emitting body which can take out a light flux emitted from a light emitting diode out of a packaging in a reasonably easy-to-use form and a light emitting device using the diode light emitting body.

[0004]

A diode light-emitting body according to the present invention has a light-emitting diode, a lead frame for the light-emitting diode, and a packaging containing the both. The packaging includes a base portion on the side of the lead frame, a sphere centered on the center of light emission of the light emitting diode and continuous to the base portion, and outward from the sphere on the optical axis of the light emitting diode. It is composed of a protruding aspherical lens portion for condensing light.

In this diode luminous body, of the luminous flux emitted from the light emitting diode, the luminous flux around the central optical axis is condensed by the condensing aspherical lens substantially parallel to the optical axis, and most of the other luminous elements are spherical. The light is emitted through the spherical surface on the outer circumference of the portion to the outside. The radially emitted luminous flux passes through the spherical surface at a right angle when exiting from the packaging, so that the loss due to interface reflection is small and the luminous flux can be efficiently extracted.

The base portion may be a cylindrical body, and the spherical portion may be a hemisphere having the same radius as the cylindrical body. In this case, the spherical surface of the base portion and the spherical portion is a continuous surface, and there is no step, which facilitates handling.

A first light emitter using the diode light emitting body according to the present invention has a light emitting diode, a lead frame for the light emitting diode, a packaging containing the both, and a reflecting mirror surrounding the packaging. The packaging has a base on the side of the lead frame, a sphere centered on the center of light emission of the light emitting diode and continuous to the base, and projects outward from the sphere on the optical axis of the light emitting diode. It is composed of an aspherical lens portion for collecting light. The reflecting mirror has a parabolic surface whose focal point is the center of the emitted light.

A light emitter using this diode light emitter is
Since the light emission point of the radially emitted light beam is the center of the light emitting portion of the light emitting diode, it is possible to easily collect the entire light beam by externally attaching a parabolic reflector having the center as the focal point. This makes it possible to form an LED optical system with high luminous intensity.

The second light emitter using the diode light emitter according to the present invention differs from the first light emitter in the following two points. That is, the first point is that the reflector is located outside the packaging. The second point is that a plurality of the packagings are arranged on the same straight line with a space therebetween, and the reflecting mirror is a gutter type having a secondary parabolic surface between the packagings located at least at both ends. That is, the central portion of each light emission is located at the focal point.

In the case of this light emitter, a plurality of diode light emitters can be directed in the same direction to emit light simultaneously or selectively, the utility as a light emitter can be enhanced, and the structure of the reflecting mirror is simple. So it helps to reduce costs.

The third light emitter using the diode light emitter according to the present invention is similar in construction to the second light emitter, but is different in the following points. That is, a plurality of diode light emitters are radially arranged at intervals on the circumference, and the reflecting mirror is a gutter-shaped annular body having a secondary parabolic surface, and the center of each light emission is located at the focal point. That is the point.

In this light emitter, a plurality of diode light emitters are lined up on the circumference and a gutter-shaped toroidal reflector is adopted, so that in the direction of 360 degrees on the plane, simultaneously, in a permutation, or intermittently. In addition, it is possible to provide a light emitting device that can project light and has an extremely high lighting effect, and prevent an increase in cost.

Also in this light emitter, the base portion may be a cylindrical body, and the spherical portion may be a hemisphere having the same radius as the cylindrical body. In this case, the base and sphere are continuous surfaces,
There is no step and it is easy to handle.

[0014]

1 is a vertical sectional view showing a specific example of a diode light emitting body A according to the present invention. Reference numeral 1 is a light emitting diode, and 2 is a lead frame of the light emitting diode 1. 3 is these light emitting diode 1 and lead frame 2
It is a packaging that incorporates. The packaging 3 includes a base 4 on the side of the lead frame 2 and a light emitting diode 1.
Has a spherical surface 5 whose center is the center of the light emission of
And a spherical portion 6 continuous with the aspherical surface, and an aspherical lens portion 7 for condensing that projects outward from the spherical surface 5 on the optical axis R of the light emitting diode 1. The end portion 8 of the lead frame 2 is
It extends out of this base 4 for connecting to a power supply as usual.

In this diode luminous body, of the luminous flux emitted from the light emitting diode 1, the luminous flux around the central optical axis R is condensed by the aspherical lens 7 for condensing substantially parallel to the optical axis R, and the others. Most of the light is transmitted through the spherical surface 5 on the outer circumference of the spherical portion 6 and is radially emitted to the outside. Of the radially emitted luminous flux, the luminous flux directed to the spherical surface 5 passes through the spherical surface 5 at a right angle, so that the loss due to interface reflection is small and the luminous flux can be efficiently extracted.

The base 4 is a cylindrical body 11, and the spherical body 6 is a hemisphere having the same radius as the cylindrical body 11. In this case, the base 4 and the spherical surface 5 of the spherical portion 6 become a continuous surface, and there is no step, which facilitates handling.

FIG. 2 shows a diode light emitter A according to the present invention.
It is a longitudinal cross-sectional view showing a specific example of the first light emitting device using.
Since the structure of the diode light emitting body A is the same as that shown in FIG. 1, the same reference numerals as those in FIG. In this case, the reflector 2 surrounding the packaging
The point where 1 is arranged is a new structure. This reflector 2
1 has a parabolic surface 22 having a focal point F at the center of light emission of the light emitting diode 1.

In the light emitting device using the diode light emitting body A, the light emitting point of the luminous flux emitted radially is the center C of the light emitting portion of the light emitting diode 1. Therefore, the focus F
By externally attaching the reflecting mirror 21 having the parabolic surface 22 as described above, it becomes possible to easily collect the entire light flux, and it is possible to form an LED optical system having high luminous intensity.

FIG. 3 is a partially cutaway perspective view showing a specific example of the second light emitter using the diode light emitter according to the present invention. 1 is a light emitting diode, 2 is its lead frame, 3
Is a packaging in which both the light emitting diode 1 and the lead frame 2 are incorporated. The packaging 3 has a reflecting mirror 21a located outside. Since the configuration of the packaging 3 is the same as that in the case of FIG. 1, the description thereof will be omitted.
Five packagings 3 are arranged on the same straight line at intervals. The reflecting mirror 21a is of a gutter type having a secondary parabolic surface 22a between at least both ends of the packaging 3 ', 3'. The center of light emission of each diode luminous body A is located at the focal point Fa of the secondary paraboloid 22a.

In the case of this light emitter, a plurality of diode light emitters A can be directed in the same direction to emit light simultaneously or selectively. Therefore, the utility as a light emitting device can be enhanced. Also, since the structure of the reflector is simple,
Helps reduce costs.

4 and 5 are half plan views of a third light emitter using the diode light emitter A according to the present invention, respectively.
It is a side view. In FIG. 4, the reflecting mirror 21b is partially cut away to show the reflecting mirror 21b, and in FIG. 5, a part of the diode luminous body A is removed at the right end portion so that the position of the focal point Fb with respect to the secondary paraboloid 22b can be easily understood. This third light emitter is shown in FIG.
The configuration is similar to the second light emitter shown in, but different in the following points. That is, a plurality of diode luminous bodies A are radially arranged at intervals on the circumference, and the reflecting mirror 21b is a trough-shaped annular body having a secondary paraboloid 22b. The central part of each light emission of is the focus Fb
It is located at. Descriptions of other similar components are omitted.

In this light emitter, a plurality of diode light emitters A are arranged on the circumference and a gutter-shaped toroidal reflector 21b is employed. Therefore, in the 360 ° direction on the plane, simultaneously, in a permutation, or intermittently. Therefore, the light can be projected. Therefore, it is possible to provide a light emitting device having an extremely high lighting effect and prevent an increase in cost.

Also in the case of this light emitter, the base 4 has a cylindrical body 11
The spherical portion 6 is a hemisphere having the same radius as the cylindrical body 11. In this case, the base 4 and the spherical surface 5 of the spherical portion 6 become a continuous surface, and there is no step, which facilitates handling.

[0024]

According to the diode luminous body of the present invention, of the luminous flux emitted from the light emitting diode, the luminous flux around the central optical axis is condensed substantially parallel to the optical axis by the condensing aspherical lens. , And most of the others are transmitted through the spherical surface on the outer periphery of the spherical body at a right angle and are emitted radially to the outside, the loss due to interface reflection is small, and the luminous flux can be extracted very efficiently.

According to the second aspect, since the base portion is a cylindrical body and the spherical body portion is a hemisphere having the same radius as the cylindrical body, the spherical surface of the base portion and the spherical body portion can be a continuous surface, and the step can be eliminated. , Easy to handle.

According to the first light emitter using the diode light emitter according to the present invention of claim 3, a reflecting mirror having a paraboloid whose focal point is the center of the light emission of the diode light emitter is used for the packaging. Since it is provided so as to surround, it is possible to easily collect all the luminous fluxes emitted in a radial direction, and it is possible to form an LED optical system having a high luminous intensity.

According to the second light emitter using the diode light emitter according to the present invention of claim 4, a plurality of diode light emitters are arranged on the same straight line at intervals and have a secondary parabolic surface. Since the gutter-shaped reflector is arranged with the light source of each diode light emitter positioned at the focal point of this reflector, it is possible to direct each diode light emitter in the same direction to emit light simultaneously or selectively. The utility as a container can be enhanced, and the structure of the reflecting mirror is simple, which helps reduce the cost.

According to the third light emitter using the diode light emitter according to the present invention of claim 5, a plurality of diode light emitters are arranged on the circumference, and a gutter-shaped annular reflector is adopted. Therefore, it is possible to project light in a 360-degree direction on the plane at the same time, in sequence, or intermittently, and it is possible to provide a light-emitting device having an extremely high illumination effect, and prevent an increase in cost.

According to the sixth aspect, similarly to the second aspect, the spherical surfaces of the base portion and the spherical portion can be formed into a continuous surface, the step can be eliminated, and the handling becomes easy.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a specific example of a diode light emitting body according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a specific example of a first light emitting device using a diode light emitting body according to the present invention.

FIG. 3 is a partially cutaway perspective view showing a specific example of a second light emitting device using a diode light emitting body according to the present invention.

FIG. 4 is a partially cutaway half plan view showing a specific example of a third light emitting device using a diode light emitting body according to the present invention.

FIG. 5 is a side view of FIG. 5 with two diode emitters next to and adjacent to the rightmost diode emitter removed.

FIG. 6 is a vertical sectional view of a conventional diode light emitter.

[Explanation of symbols]

A diode light emitter F, Fa, Fb focus 1 light emitting diode 2 lead frame 3,3 'packaging 4 base C center 5 spherical surface R optical axis 6 sphere 7 Aspherical lens section 8 end 11 cylindrical body 12 hemispheres 21, 21a, 21b Reflector 22 Paraboloid 22a, 22b Secondary paraboloid

Claims (6)

[Claims] 1. A light emitting diode (1), a lead frame (2) for the same, and a packaging (3) containing the both,
The packaging (3) is a base portion on the side of the lead frame (2)
(4), a sphere part (6) centering on the center of light emission of the light emitting diode (1) (C) and continuous with the base part (4), and the sphere part
(6) A diode light-emitting body (A), characterized in that the light-emitting diode (1) is composed of an aspherical lens portion (7) for converging outwardly on the optical axis (R) of the light-emitting diode (1). . 2. The base (4) is a cylindrical body (11), and the spherical body (6).
The diode luminous body (A) according to claim 1, wherein is a hemisphere (12) having the same radius as the cylindrical body (11). 3. A light emitting diode (1), a lead frame (2) thereof, a packaging (3) containing the both, and a reflecting mirror (21) surrounding the packaging, the packaging (3) comprising: A base portion (4) on the side of the lead frame (2), with the center of light emission of the light emitting diode (1) being the center (C) and the base portion
A spherical part (6) continuous with (4), and an aspherical lens part (7) for condensing which projects outward from the spherical part (6) on the optical axis (R) of the light emitting diode (1). The reflecting mirror (21) has a parabolic surface (22) having a focal point (F) at the center of the light emission, and a diode light emitting body (A) is used. Light emitter. 4. A light emitting diode (1), a lead frame (2) for the light emitting diode (1), a packaging (3) containing the both, and a reflecting mirror (21a) located outside the packaging. 3) is the base of the lead frame (2) side
(4), a sphere part (6) centering on the center of light emission of the light emitting diode (1) (C) and continuous with the base part (4), and the sphere part
(6) is composed of an aspherical lens portion (7) for condensing that projects outward from the optical axis (R) of the light emitting diode (1), and the packaging (3) is a plurality. Arranged on the same straight line at intervals, the reflecting mirror (21a) is a gutter type having a secondary parabolic surface (22a) between the packaging (3 ', 3') located at least at both ends. The central part of each emission is the focus (Fa)
A diode light emitter (A) characterized by being located at
Light emitter using. 5. A light emitting diode (1), a lead frame (2) thereof, a packaging (3) containing the both, and a reflecting mirror (21b) positioned outside the packaging, and the packaging ( 3) is the base of the lead frame (2) side
(4), a sphere part (6) centering on the center of light emission of the light emitting diode (1) (C) and continuous with the base part (4), and the sphere part
(6) is composed of an aspherical lens portion (7) for condensing that projects outward from the optical axis (R) of the light emitting diode (1), and the packaging (3) is a plurality. The reflecting mirrors (21b) are arranged in a radial pattern with a space on the same circumference, and the reflecting mirrors (21b) are secondary paraboloids (22b).
A light-emitting device using a diode light-emitting body (A), which is a gutter-shaped torus having a central part of each light emission located at a focal point (Fb). 6. The base portion (4) is a cylindrical body (11), and the spherical portion (6).
Is a hemisphere (12) having the same radius as the cylindrical body (11), wherein the light emitting device using the diode light emitting body (A) according to claim 3, 4 or 5.