JP2002094129A - Optical device and apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the utilization efficiency of a light emitted from a solid state light emitting element such as light emitting diodes and realize desired directivity characteristics. SOLUTION: A direct radiating region 18 for radiating out a light from a light emitting element 12, and a total reflecting region 19 for total-reflecting the light from the emitting element 12, are formed on a front interface of a mold resin 13 sealing a light emitting element 12. The direct radiating region 18 is formed like a convex lens. A light reflector 20 is provided like a concave mirror on the backside of the mold resin 13. A part of the light from the emitting element 12 is radiated forward due to a lens action during passing through the radiating region 18, and another part of the light from the emitting element 12 is totally reflected from the total reflecting region 19 onto the reflector 20 and radiated forward from this region 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an optical device and an apparatus using the optical device. Specifically, the present invention relates to a light-emitting light source including a solid-state light-emitting element such as a light-emitting diode, a light-receiving element including a light-receiving element such as a photodiode, a phototransistor, and a photoelectric conversion element (solar cell). The present invention relates to an optical component used together with a light-receiving element, a light-emitting light source, the light-receiving device, and an optical device including the optical component. Further, the present invention relates to a light emitting method and a light incident method, and a method of manufacturing the optical component. Further, the present invention relates to a photoelectric sensor, a self-luminous device, a display device, a light source for a vehicle-mounted lamp, and an outdoor display device using the optical device.

[0002]

(Background Art) In a light emitting light source in which a light emitting diode is sealed in a mold resin, light emitted forward from the light emitting diode is directly emitted from the light emitting light source, but is emitted obliquely from the light emitting diode. The lost light is totally reflected at the interface of the mold resin or scattered on the inner surface of the case, resulting in a loss, and lowering the light use efficiency.

For this reason, Japanese Patent Laid-Open Publication No. Hei.
One disclosed in Japanese Patent No. 143368 is proposed. FIG. 1 shows a cross section of the light source. In FIG.
1 is a light emitting diode, 2 is a transparent glass substrate, 3 and 4 are lead frames, 5 is a bonding wire, 6 is a reflecting member, and 8 is a mold resin made of a light transmitting resin. The lead frames 3 and 4 are provided on the back surface of the transparent glass substrate 2, and the light emitting diode 1 is mounted on the back surface of the lead frame 3 and connected to the lead frame 4 by bonding wires 5. The reflecting surface 7 of the reflecting member 6 is formed in a polyhedral shape by a plurality of flat plate regions.

In this light emitting light source, light is emitted from the light emitting diode 1 toward the rear side, and the light emitted toward the rear side is reflected by the reflecting surface 7 and emitted forward through the mold resin 8 and the transparent glass substrate 2. I try to make it. In particular, the light emitted in the oblique direction from the light emitting diode 1 is also reflected by the reflection surface 7 and then emitted forward through the mold resin 8 and the transparent glass substrate 2, so that the light use efficiency is improved.

However, in such a light source,
When the light reflected by the reflecting member is emitted forward, it is blocked by the light emitting diode and the lead frame, and these shadows are generated, and it is possible to efficiently use the light near the center of the optical axis where the light amount can be obtained most. Can not. Furthermore, since the directional characteristics of light emitted from the light emitting light source become dark near the center of the optical axis, the light source for display has a poor appearance and has a visual defect.

FIG. 2 is a sectional view showing the structure of another conventional light source. In this light emitting light source, a light emitting diode 1 such as an LED chip is die-bonded to the tip of one lead frame 3 and the light emitting diode 1 and the other lead frame 4 are connected by a bonding wire 5 to form a transparent mold. It is sealed in resin 8. The light emitting diode 1 is located at the center of the front surface (resin interface) of the mold resin 8.
The lens unit 9 is provided so as to be coincident with the optical axis of.

In the light-emitting light source as shown in FIG. 2, the light-emitting diode 1 is not shaded by the lead frame 3, and the light emitted from the light-emitting diode 1 is emitted forward from the lens unit 9 without being interrupted. .

However, in such a light emitting light source, only the light emitted forward from the light emitting diode 1 is used, so that the light use efficiency is also poor. In addition, a single light emitting light source is a so-called point light source, and the light emitting area cannot be increased.

(Regarding the light receiving element) In the case of a photodiode, for example, for sensing, the sensitivity is improved by increasing the amount of received light, and in the case of a photoelectric conversion element, the electric energy generated by increasing the amount of received light is reduced. To increase. Therefore, it is desired to increase the amount of received light in these light receiving elements as much as possible.

If the intensity of the incident light is the same, the first method to increase the amount of received light is to increase the light receiving area of the light receiving element. However, in the method of enlarging the chip area of the light receiving element, the number of chips that can be obtained from one single crystal wafer is reduced, so that the cost is greatly increased.

In addition, a lens is arranged in front of the light receiving element,
There is a method of condensing light incident on a lens on a light receiving element. However, in such a light receiver, a large lens is required and the thickness is increased by the distance between the light receiving element and the lens. Therefore, there is a problem that the light receiver becomes large.

[0012]

DISCLOSURE OF THE INVENTION It is a first object of the present invention to enable a desired directional characteristic to be realized in an optical device such as a light emitting light source or a light receiving device.

A second object of the present invention is to further improve the use efficiency of light emitted from a solid state light emitting device such as a light emitting diode.

A third object of the present invention is to increase the light emitting area of light emitted from a solid state light emitting device such as a light emitting diode.

A fourth object of the present invention is to enhance the light receiving efficiency of a photodiode, a photoelectric conversion element or the like by increasing the light receiving area.

A fifth object of the present invention is to increase the assembling accuracy of the light emitting light source and the light receiving device and to facilitate the manufacture thereof.

A sixth object of the present invention is to provide a light-emitting light source and a device using the light-emitting light source that can suppress a decrease in visibility from below (for example, from the ground) due to disturbance light. It is in.

An optical device according to the present invention comprises: an optical element;
An optical device comprising a resin interface that substantially totally reflects light that deviates from a predetermined area in front of the optical element, and a light reflecting member,
An optical path from the optical element to the outside of the optical device,
A positional relationship between the optical element, the resin interface, and the light reflecting member is determined so as to pass through a path that reflects at least once at each of the resin interface and the light reflecting member. is there. Here, the optical element is a light-emitting element such as a light-emitting diode or a light-receiving element such as a photodiode or a photoelectric conversion element. According to this optical device, in the path between the optical element and the front of the optical device, the light that deviates from the predetermined region is reflected by the resin interface and the light reflecting member. Desired directional characteristics can be realized by the shape. In addition, the thickness of the optical device can be reduced.

In the first light emitting light source according to the present invention, the position of the light emitting element is determined and covered with resin so that light out of a predetermined area in front of the light emitted from the light emitting element is almost totally reflected at the resin interface. A light reflecting member is provided behind the resin interface to reflect light emitted from the light emitting element and almost totally reflected at the resin interface and emit the light forward. Here, the resin interface for substantially totally reflecting light may be the interface between the resin and air, or the interface between the resin and another resin, a multilayer reflective film, or the like.

According to the first light emitting light source, light almost totally reflected by the resin covering the light emitting element can be emitted forward by being reflected by the light reflecting member, thereby improving light use efficiency. be able to. In addition, light emitted forward from the light emitting element can also be emitted forward without being blocked by the light emitting element itself, so that the light use efficiency is further improved and the central part of the light emitting light source is darkened. And the directional characteristics can be improved. Further, by changing the shape of the resin interface and the shape of the light reflecting member, the directional characteristics of light emitted from the light emitting source can be arbitrarily changed.

According to the first aspect of the first light emitting light source, in the light emitting light source, at least a part of the resin interface is perpendicular to an optical axis of the light emitting element in a region in contact with the predetermined region. Inclined to In the light emitting light source according to the first aspect, for most of the light emitted from the light emitting element and reaching the boundary between the resin interface and the predetermined region, the angle formed with the optical axis is the critical angle of the total reflection of the light incident on the resin interface. The angle can be smaller than that. If the angle between the light from the light emitting element reaching the boundary of the resin interface and the optical axis of the light emitting element is smaller than the critical angle of total reflection, the critical angle of total reflection at the resin interface with respect to the optical axis is smaller. Light emitted at an angle is also totally reflected at the resin interface,
Further, the light can be reflected forward by the light reflecting member. As a result, the ratio of stray light in a predetermined area in front of the light emitting element can be reduced, and the light use efficiency can be further improved. However, for all light rays emitted from the light emitting element and reaching the boundary between the resin interface and the predetermined area,
The angle between the optical axis and the optical axis does not need to be smaller than the critical angle for total reflection of light entering the resin interface. For most rays, the angle between the optical axis and the critical angle of total reflection of light entering the resin interface is not necessary. It is effective if the angle is smaller than the above.

According to the second aspect of the first light-emitting light source, the light-emitting light source may be configured such that at least a region of the light reflecting member to which the light totally reflected at the resin interface reaches reaches the light-emitting portion with respect to the resin interface. The concave mirror has a focal point around the mirror image position of the element. According to the light emitting light source of the second aspect, the light reflected by the light reflecting member is emitted forward as substantially parallel light.

According to the third aspect of the first light emitting light source, the light emitting light source has a curvature on a light reflecting surface of the light reflecting member at any two cross sections passing through the optical axis of the light emitting element and orthogonal to each other. Have different distribution ranges. here,
The distribution range of the curvature is different when the distribution ranges of the curvatures do not coincide with each other, and not only when the distribution ranges do not overlap with each other, but when the distribution ranges partially overlap with each other or when one of the distribution ranges is different. A case where the distribution range is wider than the other distribution range is also included.

According to the light emitting source of the third aspect, the distribution range of the curvature on the light reflecting surface of the light reflecting member is different in any two cross sections passing through the optical axis of the light emitting element and orthogonal to each other. Even if the light emitted from the element is evenly emitted around the optical axis, the spread of the light reflected on the light reflecting surface differs depending on the direction. Therefore, it is possible to obtain a light emitting light source having a directional characteristic that is asymmetrical about the optical axis depending on the application, such as a directional characteristic that spreads horizontally.

Further, according to the fourth aspect of the light-emitting light source of the third aspect, the light-emitting light source is provided with an optical lens in a predetermined area in front of the light-emitting element, and is orthogonal to each other through the optical axis of the light-emitting element. In any two sections, the distribution range of the curvature on the surface of the optical lens is different. Here, the meaning that the distribution range of curvature is different means
This is the same as the case of the light reflecting member. According to the light emitting light source of the fourth embodiment, the light emitted forward by the optical lens can be collected. Moreover, since the optical lens also has an asymmetric shape around the optical axis, the light of the light emitting element emitted forward through the optical lens also has an asymmetric or non-uniform directivity around the optical axis. Therefore, the light emitted forward from the center of the light emitting element can be expanded, for example, horizontally according to the application.

A second light emitting light source according to the present invention is a light emitting light source having a light emitting surface in front of a light emitting element, wherein the light emitting surface is inclined from a plane perpendicular to the optical axis direction of the light emitting element. Things. In the second light emitting light source of the present invention, since the light emitting surface is inclined from a surface perpendicular to the optical axis direction of the light emitting element, by selecting the direction of the light emitting surface, The reflected disturbance light can be prevented from going in the same direction as the light emitted from the light emitting light source. Accordingly, it is possible to prevent the disturbance light reflected by the light-emitting light source from making it difficult to see the light-emitting light source, and to prevent the light-emitting light source from being turned on or turned off.

A third light-emitting light source according to the present invention is a light-emitting light source having a light-emitting surface in front of a light-emitting element, wherein the light-emitting surface is installed so as to face upward from a horizontal direction. At least a part of the light emitted from the light source is emitted downward. Third of the present invention
In the light emitting light source, the light emitting surface is installed facing upward than the horizontal direction, and at least a part of the light emitted from the light emitting light is emitted downward. Therefore, even when a device using a light-emitting light source, for example, a display device is installed at a high position, disturbance light from a low altitude such as the west sun or the morning sun is unlikely to be reflected downward. On the other hand, since the light from the light emitting light source is emitted downward, it is difficult for the display to be difficult to see due to disturbance light, and it is difficult to misunderstand the lighting state and the lighting state.

According to the fifth aspect of the first light-emitting light source, the light-emitting light source is configured such that, out of the light emitted from the light-emitting element, light that departs from a predetermined region in front is substantially totally reflected at the resin interface. In a light emitting element light source provided with a light reflecting member provided behind the resin interface, which reflects the light emitted from the light emitting element and almost totally reflected at the resin interface and emits the light forward, The light reflected by the light reflecting member is emitted in a direction inclined with respect to the optical axis of the light emitting element. In the light emitting light source according to the fifth aspect, the light reflected by the light reflecting member is emitted in a direction inclined with respect to the optical axis of the light emitting element. The emission direction can be set. Therefore, the light is emitted in a required direction, for example, downward, and the light emitting light source itself is installed facing upward, so that disturbance light such as west sun or sunrise is reflected downward by the light emitting light source. Can be prevented. Also,
In this light emitting light source, light emitted from the light emitting element is totally reflected at the resin interface in a direction making a large angle with respect to the optical axis, further reflected forward by the light reflecting member, and emitted forward from the light emitting light source. As a result, the light use efficiency is improved.

[0029] According to the sixth aspect of the first light emitting light source, the light reflecting member may be configured such that at least a region of the light reflecting member to which light totally reflected at the resin interface reaches forms a concave mirror, The light emitting element is arranged at a position deviated from the mirror image position of the focal point of the concave mirror. According to the light emitting light source of the sixth aspect, light can be emitted in the direction of the optical axis inclined toward the front of the light emitting light source, and the degree of freedom of the directional characteristics of the light emitting light source is increased.

According to the seventh aspect of the first light emitting light source, the light emitting light source includes a second light reflecting member for reflecting light emitted from a side surface of the light emitting element in a forward direction; The angle of inclination of the second light reflecting member is set so that most of the light reflected by the light reflecting member reaches the resin interface. According to the light emitting source according to the seventh aspect, the light emitted from the side surface of the light emitting element is reflected by the second light reflecting member, then emitted directly from a predetermined area to the outside, and greatly inclined from the optical axis of the light emitting light source. It can be prevented from being emitted in the direction. That is, since the light emitted from the side surface of the light emitting element is guided to the resin interface by being reflected by the second light reflecting member, the light totally reflected at the resin interface is guided to the light reflecting member, and is reflected by the light reflecting member. Thus, the emission direction is controlled, so that the light can be emitted substantially in the optical axis direction of the light emitting device.

According to the eighth aspect of the light-emitting light source of the seventh aspect, the light-emitting light source includes a second light-reflecting member,
The light emitting device is provided on a lead frame for arranging the light emitting device. When the light emitting element is provided on the lead frame, the second light reflecting member can be formed by the lead frame, and the number of components can be reduced.

According to the ninth aspect of the first light emitting device, in the light emitting light source, at least one portion of the light reflecting member is in contact with the outer peripheral portion of the resin constituting the resin interface. According to the light emitting light source of the ninth aspect, when the light emitting light source is manufactured by resin molding, the reflection member can be positioned by contacting the inner peripheral portion of the mold cavity, and the positional accuracy of the light reflection member can be easily obtained. be able to.

A photodetector according to the present invention is a photodetector in which a light receiving element is molded in a resin, and reflects light incident on a region outside a predetermined region in front of the light receiving element, and furthermore, almost all light is reflected at a resin interface. A light reflecting member is provided behind the interface on the light receiving side of the resin so that the light is reflected and made incident on the light receiving element.

In the light-receiving device according to the present invention, the light incident on the outside of the light-receiving element is also reflected by the light reflection plate, and then substantially totally reflected at the resin interface, so that the light is incident on the light-receiving element. Therefore, the light receiving area of the light receiver can be increased without increasing the area of the light receiving element, and the light receiving efficiency of the light receiver can be improved. Further, since the light is collected by the light reflecting member provided behind the light receiving side interface of the resin and the resin interface, the light receiving device can have a relatively thin structure.

According to the first mode of the above-mentioned light receiver,
In the light receiver, at least a portion of the light reflecting member is in contact with an outer peripheral portion of a resin layer forming the resin interface. According to the light receiver of the first aspect, when manufacturing the light receiver by resin molding, the reflection member can be positioned by contacting the inner peripheral portion of the mold cavity, and the positional accuracy of the light reflection member can be easily obtained. be able to.

A first optical component according to the present invention is an optical module in which an optical active element such as a light emitting element or a light receiving element is mounted at an element mounting position. It has a resin interface for substantially total reflection and a light reflecting member, and an optical path from the element mounting position to the outside passes through a path that reflects at least once at each of the resin interface and the light reflecting member. Further, a positional relationship between the element mounting position, the resin interface, and the light reflecting member is determined. Here, solid-state light-emitting chips such as LED (light-emitting diode) chips, LED
It includes a light emitting element, a photodiode, a phototransistor, a photoelectric conversion element (solar cell), etc., in which a chip or the like is packaged. The optical path from the element mounting position to the outside is defined as an optical path from the optical active element mounted at the element mounting position to the outside of the optical active element and the optical module, or the optical path outside the optical active element and the optical module. From the optical device to the optically active device mounted at the device mounting position.

According to such an optical component, light emitted from an optically active element, for example, a light emitting element in a direction out of a predetermined area is totally reflected at a resin interface, and further reflected by a light reflecting member. The light can be emitted to the outside, and a desired directional characteristic can be obtained by designing the shape of the resin interface and the light reflecting member. Further, when the light is incident from the outside and reflected by the light reflecting member, light emitted in a direction outside the predetermined region is totally reflected at the resin interface, and can be incident on an optical active element, for example, a light receiving element,
Desired light receiving characteristics can be obtained by designing the shapes of the resin interface and the light reflecting member. Further, by reflecting light so as to be folded back at the resin interface and the light reflecting member, the size and thickness of the optical component can be reduced.

The second optical component according to the present invention is an optical component disposed in front of the light source, and includes a resin interface for substantially totally reflecting light emitted from the light source, and a substantially total reflection at the resin interface. And a light reflecting member that reflects the reflected light and emits the light forward. Second according to the invention
According to the above optical component, by combining with the light emitting element, for example, the same operation and effect as those of the first light emitting light source can be obtained. In addition, since this optical component is a separate component from the light emitting element, it is easy to handle, for example, it can be attached to the light emitting element. Note that the optical component of the present invention can obtain the same function and effect even when applied to a light source such as a light bulb or a fluorescent lamp as well as a light emitting element.

The third optical component according to the present invention is an optical component disposed on the front surface of the light receiving element, and includes a light reflecting member for reflecting light incident from outside, and a light reflecting member for totally reflecting light reflected by the light reflecting member. A resin interface that reflects the light and makes the light incident on the light receiving element. According to the third optical component of the present invention, it is possible to obtain, for example, the same operation and effect as those of the above-described light receiver by combining with the light receiving element. Also, since this optical component is a separate component from the light receiving element, it is easy to handle, for example, it can be attached to the light receiving element.

According to the first aspect of the first to third optical components, the optical component has a surface opposite to the resin interface for disposing at least one of the light emitting element and the light receiving element. Is provided with a concave portion. According to the optical component of the first aspect, since the light emitting element or the light receiving element is arranged in the concave portion, the light emitting element, the light receiving element or the optical component can be easily positioned by the concave portion.

According to the second aspect of the first to third optical components, the element mounting position has a contact portion for determining a positional relationship with the optically active element. Here, the agreement means that the two members exactly match.
In this embodiment, since the engagement part is provided in the optical component, the optically active element can be mounted without play, and the positioning with the optically active element can be easily performed.

According to the third aspect of the above-mentioned first to third optical components, the portion to be the element mounting position is a concave portion or a through hole. In this embodiment,
Since the optically active element can be housed in the element mounting position which is a recess or a through hole, or the optically active element can be inserted, the optical component and the optically active element can be three-dimensionally combined to be downsized. .

According to the fourth aspect of the above-described first to third optical components, there is provided a positioning portion for determining a positional relationship with the optically active element. Therefore, when this optical component is combined with an optically active element, the optical parts can be positioned with respect to each other by the positioning portion, so that the optical part and the optically active element can be assembled without play and alignment of the optical axes with each other is easy. Can be done.

According to the fifth aspect of the first to third optical components, the external shape when viewed from the front has a major axis direction and a minor axis direction. According to this optical component, for example, when light emitted from the light emitting element is reflected by the optical component and emitted forward, light having a long axis direction and a short axis direction, for example, a light beam cross section having an elliptical shape is used. It can be emitted.

The optical component array according to the present invention has a plurality of optical components according to the present invention arranged therein. According to this optical component array, the optical component can be used as a surface light source. Moreover, since the optical components can be miniaturized,
The light emitting point can be made dense, and the optical component array can be made thin.

In a second optical device according to the present invention, the optical component and the optically active element are arranged so as to have a predetermined space, and this space is filled with a light-transmitting substance, so that the optical component and the light Since the active element is engaged, high dimensional accuracy is not required for the optical component and the optical active element, and the production of the optical component becomes easy.

According to the sixth aspect of the first to third optical components, at least one portion of the light reflecting member is in contact with the outer peripheral portion of the resin layer constituting the resin interface. I have. According to the optical component of the second aspect, when the optical component is manufactured by resin molding, the reflection member can be positioned by contacting the inner peripheral portion of the mold cavity, and the positional accuracy of the light reflection member can be easily obtained. be able to.

According to the first method of manufacturing an optical component of the present invention, there is provided a resin layer having a resin interface for substantially totally reflecting light outside a predetermined region in front of the light emitting element, and a resin layer having substantially total reflection at the resin interface. And a light reflecting member that emits the emitted light forward. In a method for manufacturing the optical component, the resin is injected in a state where at least a part of the outer peripheral portion of the light reflecting member is in contact with the inner surface of the cavity of the molding die. It is characterized by having a process.

According to the first optical component manufacturing method of the present invention, the first optical component can be manufactured.
In addition, when an optical component is manufactured by resin molding, the reflection member can be positioned by contacting the inner peripheral portion of the mold cavity, and the positional accuracy of the light reflection member can be easily obtained.

The second method for manufacturing an optical component according to the present invention comprises a light reflecting member for reflecting light incident on a region outside a predetermined region in front of the light receiving element, and a light reflecting member for substantially reflecting the light reflected by the light reflecting member. In a method of manufacturing an optical component including a resin layer having a resin interface for total reflection, resin injection is performed in a state where at least a part of an outer peripheral portion of the light reflecting member is in contact with an inner surface of a cavity of a molding die. It is characterized by having a process.

According to the method of manufacturing the second optical component according to the present invention, the second optical component can be manufactured,
In addition, when an optical component is manufactured by resin molding, the reflection member can be positioned by contacting the inner peripheral portion of the mold cavity, and the positional accuracy of the light reflection member can be easily obtained.

In the light emitting method according to the present invention, light out of a predetermined area in front of light emitted from a light source is substantially totally reflected at a resin interface, and light substantially totally reflected at the resin interface is reflected at the resin interface. The light is emitted forward by a light reflecting member provided at the rear. According to this light emitting method, in a path of light emitted from the light source, light that deviates from a predetermined region is reflected by the resin interface and the light reflecting member. Characteristics can be realized.

In the light incidence method according to the present invention, of the light incident from the outside, light that deviates from a predetermined area in front of the light receiving element is reflected by a light reflecting member, and the light reflected by the light reflecting member is reflected at a resin interface. After substantially total reflection, the light is incident on the light receiver. According to this light incident method, in the path of the light incident on the light receiving element, the light that deviates from the predetermined area is reflected by the resin interface and the light reflecting member, so that the desired shape depends on the shape of the resin interface and the light reflecting member. Directivity characteristics can be realized.

The light-emitting light source and light-receiving device of the present invention can be applied to various devices. For example, a photoelectric sensor according to the present invention includes the light receiver according to the present invention using a photoelectric conversion element as the light receiving element, and a light projecting element, and light emitted from the light projecting element or the light projecting element. The light emitted from the object and reflected by the target object is detected by the light receiver. Further, a self-luminous device according to the present invention includes a light receiver according to the present invention using a photoelectric conversion element as the light receiving element, a charger for storing electric energy generated by the light receiver, and a light emitter. It is a thing.
In addition, a display device according to the present invention includes a plurality of light emitting light sources according to the present invention or a plurality of optical components according to the present invention. Further, a light source for a vehicle-mounted lamp according to the present invention is obtained by arranging a plurality of light sources according to the present invention or a plurality of optical components according to the present invention.
Furthermore, an outdoor display device according to the present invention is one in which a plurality of light emitting light sources according to the present invention or a plurality of optical components according to the present invention are arranged. .

The components described above of the present invention can be combined as arbitrarily as possible.

[0056]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) As a first embodiment, a cross section of a light emitting light source 11 is shown in FIG. According to this embodiment, a light emitting element 12 such as a light emitting diode (LED chip) is sealed in a mold resin 13 made of a translucent resin material. The light emitting element 12 sealed in the mold resin 13 is mounted on a stem 15 provided at the tip of a lead frame 17 and connected to the other lead frame 14 by a bonding wire 16 to emit light on the light emitting side. It is arranged toward the front of the light source 11.

A direct emission area 18 having a convex lens shape such as a spherical lens shape, an aspherical lens shape, or a parabolic shape is formed in the center of the front surface of the mold resin 13, and the direct emission area 18 is formed around the area. Are formed to form a planar total reflection region 19. In addition, the direct emission area 1
8 is formed such that the central axis thereof coincides with the central axis of the light emitting element 12, and the total reflection area 19 is a plane perpendicular to the optical axis of the light emitting element 12. The light emitting element 12 is located at or near the focal point of the direct emission area 18. The angle α formed by the direction in which the boundary between the direct emission region 18 and the total reflection region 19 is viewed from the light emitting element 12 and the optical axis of the light emitting element 12 is the critical angle θc of total reflection between the mold resin 13 and air. Is greater than or equal to.

Therefore, of the light emitted from the light emitting element 12, the light radiated to the direct emission area 18 is substantially collimated and directly emitted from the front surface of the mold resin 13 to the front. Further, of the light emitted from the light emitting element 12, the light emitted to the total reflection area 19 is totally reflected at the resin interface,
It is directed to the back side of the mold resin 13.

The light reflecting portion 20 is formed on the back surface of the mold resin 13 by forming a metal material having high reflectivity such as aluminum or silver by vacuum evaporation or the like, or by forming a multilayer reflective film. ing. At least the area of the light reflecting section 20 to which the light reflected by the total reflection area 19 reaches is a concave mirror such as a spherical mirror or a rotating parabolic mirror having a focal point around a mirror image position of the light emitting element 12 with respect to the total reflection area 19. Has become.

Therefore, the light emitted from the light emitting element 12 and totally reflected by the total reflection area 19 reaches the light reflection section 20 and is reflected by the light reflection section 20, and then becomes almost parallel light to become a total reflection area. The light is emitted forward from 19.

Therefore, the light emitting light source 11 according to this embodiment
According to the method, almost all the light emitted from the light emitting element 12 to the front side (that is, the light totally reflected by the total reflection area 19) can be extracted to the front of the light emitting light source 11, thereby increasing the light use efficiency. can do. Moreover, the light emitted forward from the light emitting element 12 is directly emitted from the emission area 18 without being blocked by anything, so that the optical axis is not darkened as in the above-described conventional example, and the directional characteristics are not increased. Is improved.

Further, the light emitted from the light emitting element 12 in the oblique direction is totally reflected by the total reflection area 19,
Even if it is 0, it is reflected and emitted forward, so that the optical path length becomes longer and the aberration can be reduced by that much, so that the light emitting light source 11 can be made more precise.

In a conventional light emitting light source using a light emitting diode, the light totally reflected by the molding resin is hardly emitted forward, so that a light amount distribution having a narrow width as shown in FIG. As shown, in the light emitting light source 11 of this embodiment, the light emitted from the light emitting element 12 spreads over the entire front surface of the mold resin 13 and is emitted after being made substantially parallel, so as shown in FIG. A wide and uniform light amount distribution (beam profile) can be obtained.

In this embodiment, parallel light is designed to be emitted from the light-emitting light source 11. However, the position of the light-emitting element 12 and the focal position, surface shape, and concave mirror shape of the direct emission area 18 having a convex lens shape are used. By changing the focal position, surface shape, and the like of the light reflecting section 20, the directional characteristics of light emitted from the light emitting light source 11 can be changed as desired.

(Second Embodiment) FIG. 5 shows a sectional view of a light emitting source 21 according to a second embodiment. In FIG. 5, the stem, the lead frame, the bonding wires, and the like are not shown (similarly, the lead frame and the like are sometimes omitted in the light emitting light source shown in FIG. 6 and thereafter). In this embodiment, the direct emission region 18 at the interface of the mold resin 13 is used.
Are formed in a planar shape. Therefore, although the direct emission area 18 and the total reflection area 19 cannot be distinguished from each other in appearance, they are distinguished from the behavior of the light beam emitted from the light emitting element 12, and the critical angle of the total reflection from the light emitting element 12 to the interface of the mold resin 13. The position of the light incident at θc is the boundary between the direct emission area 18 and the total reflection area 19. Therefore, the light that has entered the direct emission region 18 inside this boundary is directly emitted from the direct emission region 18, and the light that has entered the outside total reflection region 19 is totally reflected by the total reflection region 19. The light is reflected by the light reflecting portion 20 and emitted forward.

Also in this embodiment, the light can be totally reflected at the interface of the mold resin 13 and the light use efficiency can be improved. Further, since the direct emission region 18 is formed in a planar shape, the light emitted from the direct emission region 18 spreads, and the directional angle of the light emitted from this region can be widened. Therefore, when it is desired to widen the directivity angle or when there is not much restriction on the directivity angle, the front emission shape of the mold resin 13 can be simplified by making the direct emission area 18 flat as in this embodiment.

(Third Embodiment) FIG. 6 is a sectional view of a light emitting light source 22 according to a third embodiment. In this embodiment, the front part 18a of the direct emission area 18 is made larger than its base part 18b, and the front part 18a is shaped like a lens. When the light reflected by the light reflecting portion 20 is substantially parallelized after being totally reflected at the resin interface, the total reflection region 19
Since there is a region where light is not emitted in the inner peripheral portion of the device, the total reflection region 19 is narrowed by increasing the front portion 18a of the direct emission region 18 as long as the light emitted from the total reflection region 19 is not blocked. Without this, the lens shape of the direct emission area 18 can be enlarged. Further, according to such an embodiment, it is possible to efficiently design the ratio of the light emitted from the lens-shaped direct emission region 18 and the light emitted from the total reflection region 19. Therefore, the light source 2
2 can achieve higher performance.

(Fourth Embodiment) In the light-emitting light source 11 shown in FIG. 3, light that has directly entered the end (outer periphery) of the light-emitting region 18 is not emitted forward, and the light-emitting element 1
There is a case where the light emitted from the light source 2 becomes a loss. That is, when the distance between the light emitting element 12 and the direct emission region 18 is short, the curvature of the direct emission region 18 becomes large, so that the light emitted to the end of the direct emission region 18 is emitted in the horizontal direction, It may be reflected. In addition, since the end of the direct emission region 18 must be outside the direction forming an angle equal to the critical angle of total reflection with respect to the central axis of the light emitting element 12, the size of the direct emission region 18 (as viewed from the front) (Diameter at that time) has a lower limit, so that the area of the outer peripheral portion of the direct emission region 18 increases, and the loss of light emitted from the light emitting element 12 also increases. In addition, since the size of the direct emission region 18 has a lower limit, the surface curvature of the direct emission region 18 also has an upper limit, which limits the degree of freedom in designing the direct emission region 18.

A light emitting light source 23 according to the fourth embodiment taking this point into account is shown in the sectional view of FIG. That is, in this embodiment, the emission region 18 is provided directly at the center of the surface of the mold resin 13, and the total reflection region 19 is provided around the outside. The direct emission area 18 has a substantially hemispherical shape, and the central axis thereof coincides with the optical axis C of the light emitting element 12. Thus, in the light emitting light source 23, the light emitted directly from the light emitting element 12 toward the emission region 18 is emitted substantially forward from the direct emission region 18 while being refracted.

The total reflection area 19 includes a conical (truncated) or pyramidal (truncated) tapered portion 19b and a flat portion 19a located outside thereof, and the central axis of the tapered portion 19b is light emission. The plane portion 19a is coincident with the optical axis C of the element 12, and is a plane perpendicular to the optical axis C of the light emitting element 12. Also,
The cross section passing through the center axis of the tapered portion 19b is not limited to a straight line but may be a curved line. For example, the tapered portion 1
9b may be a rotation surface of a curve whose center axis is the rotation axis.

The angle θb that the direction in which the boundary between the flat portion 19a and the tapered portion 19b of the total reflection region 19 is viewed from the light emitting element 12 and the optical axis C of the light emitting element 12 is
Critical angle θ of total reflection at the interface (eg, with air)
It is larger than c. Therefore, all the light emitted from the light emitting element 12 and incident on the flat portion 19 a is specularly reflected by the flat portion 19 a so as to go to the light reflecting portion 20.

The light emitting element 12 directly emits light from the emission region 18.
(A boundary between the direct emission region 18 and the tapered portion 19 b) is an angle θa formed with the optical axis C of the light emitting element 12.
Is smaller than the critical angle θc of total reflection at the interface (for example, with air) of the mold resin 13. That is, when viewed from the front, the size of the direct emission region 18 is smaller than that of the light emitting light source 11 as shown in FIG. 3, and the ratio of the outer peripheral portion of the direct emission region 18 to the whole becomes smaller. Therefore, in the light emitting light source 11 having the structure as shown in FIG. 3, the light that has been emitted sideways at the end of the direct emission region 18 or has been totally reflected and lost has been totally reflected by the tapered portion 19b. The light can be reflected by the light reflecting portion 20 and emitted forward, and light loss can be reduced. In addition, as a result of the direct emission region 18 becoming smaller, the curvature of the surface of the direct emission region 18 can also be increased, and design restrictions are reduced.

The light incident on the tapered portion 19b is totally reflected by the tapered portion 19b. For example, when the cross section of the tapered portion 19b is formed as a straight line as shown in FIG. 7, the slope β of the tapered portion 19b is designed to satisfy the following expression, where the critical angle of total reflection is θc. . β
≧ θc−θa Therefore, all light emitted from the light emitting element 12 and incident on the tapered portion 19b is totally reflected by the tapered portion 19b so as to go to the light reflecting portion 20.

Thus, the flat portion 19a and the tapered portion 1
The shape of the light reflecting portion 20 is designed such that the light totally reflected at 9 b is reflected by the light reflecting portion 20 and then emitted forward from the total reflection region 19.

Therefore, according to this embodiment, the loss of light can be reduced and the degree of freedom in designing the direct emission area 18 can be increased.

(Fifth Embodiment) FIGS. 8 and 10 show a fifth embodiment.
3 is a perspective view and a sectional view of a light emitting light source 24 according to the embodiment. FIG. FIG. 9 is a perspective view of a light emitting light source 24 showing the inside through the mold resin 13, and FIG. 11 is an enlarged view of a portion A in FIG. In the light emitting light source 24, a metal member is formed into a parabolic shape by press working or the like, and the surface thereof is mirror-finished by plating with aluminum or silver, and is used as the light reflecting portion 20. Alternatively, a material having a glossy surface by applying a chemical treatment to a pressed product such as aluminum or silver may be used as the light reflecting portion 20.

The stem 1 is located at the center of the light reflecting portion 20.
5 for opening the light emitting element 1
2 is mounted in the opening 20a in a non-contact manner.
Is sealed in the mold resin 13.

On the front of the mold resin 13,
As in the embodiment of FIG. 7, an emission region 18 is formed directly at the center, a tapered portion 19b is formed around the emission region 18, and a flat portion 19a is formed around the emission region.

According to the light emitting source 24 having such a structure,
As in the embodiment of FIG. 3, there is no need to form a vapor deposition film or the like (light reflecting portion 20) on the back surface of the mold resin 13, and the light reflecting portion 20 which is an individual component together with the light emitting element 12 and the lead frames 14 and 17 is not necessary. Need only be set in the molding die, and the manufacturing process of the light emitting source 24 can be simplified.

In addition, as shown in FIG. 11, a tapered chamfered portion 25 is provided at the outer peripheral portion of the front surface of the mold resin 13, and the corner of the outer peripheral surface of the light reflecting portion 20 is set to the corner B of the chamfered portion 25. Are matched. Therefore, the molding resin 1
3 can be set in a state where the outer peripheral angle of the light reflecting portion 20 on the reflection surface side is in contact with the inner surface of the cavity of the molding die. The light reflecting portion 20 can be inserted with high accuracy, and the mounting accuracy of the light reflecting portion 20 can be increased.

(Sixth Embodiment) FIG. 12 shows a sixth embodiment of the present invention.
It is sectional drawing of the light emission light source 26 by embodiment. The light emitting light source 26 has substantially the same structure as that of the fifth embodiment, except that the total reflection area 19 is constituted only by a plane portion perpendicular to the optical axis of the light emitting element 12.

In FIG. 12, as described in the first embodiment, at least the area of the light reflecting portion 20 to which the light reflected by the total reflection area 19 reaches is the light emission of the total reflection area 19. This indicates that the element 12 is a concave mirror such as a spherical mirror or a rotating parabolic mirror whose focal point is the position of the mirror image 12a. Therefore, the light emitted from the light emitting element 12, totally reflected by the total reflection area 19, and further reflected by the light reflection section 20 is emitted forward as substantially parallel light through the total reflection area 19.

(Seventh Embodiment) FIG. 13 is a sectional view of a light emitting light source 27 according to a seventh embodiment. In this embodiment, the total reflection area 19 is formed in an inverted conical shape by being inclined.
In FIG. 13, since the total reflection region 19 is formed in an inverted conical shape so that the outer peripheral portion projects forward, the angle of incidence of light that exits the light emitting element 12 and enters the total reflection region 19 can be increased, The diameter of the inner peripheral portion of the total reflection area 19 can be reduced accordingly. Therefore, it is possible to increase the ratio of light reflected by the light reflecting portion 20 after being totally reflected by the total reflection region 19 and emitted from the total reflection region 19, and by optimally designing the shape of the light reflecting portion 20, It is possible to easily realize a light emitting light source having an arbitrary directivity.

Although not shown, the total reflection area 19 may be formed in a conical shape so that the outer peripheral portion is retracted rearward. When the total reflection area 19 is formed in a conical shape, light emitted from the total reflection area 19 can be brought to the inner peripheral side, and the direct emission area 1
The dark portion of the total reflection area 19 near 8 can be reduced.

(Eighth Embodiment) FIG. 14 is a sectional view of a light emitting source 28 according to an eighth embodiment. This light source 2
8, the direct emission area 18 and the total reflection area 19 formed on the front surface of the mold resin 13 are formed by smoothly changing curved surfaces, and most of the light emitted forward from the light emitting element 12. Is totally reflected by the front surface (total reflection area 19) of the mold resin 13, and then is reflected by the light reflecting portion 20 to be emitted forward. According to the light emitting light source 28 having such a structure, the degree of freedom in designing the light emitting light source 28 can be improved.

(Ninth Embodiment) FIG. 15 is a sectional view of a light emitting light source 29 according to a ninth embodiment. According to this embodiment, the total reflection area 19 is a curved surface that changes continuously, for example, a lens curved surface, so that the degree of freedom in design can be further improved.

(Tenth Embodiment) FIG. 16 is a sectional view showing a light emitting light source 30 according to a tenth embodiment. In the light emitting light source 30 according to this embodiment, the lens shape of the direct emission area 18 having a lens shape is a Fresnel lens, and the thickness of the direct emission area 18 or the light emission light source 30 is reduced.

(Eleventh Embodiment) FIG. 17 is a sectional view showing a light emitting light source 31 according to an eleventh embodiment. In the light emitting source 31 according to this embodiment, the mold resin 1
3 has a rear surface formed in the shape of a Fresnel lens, and a light reflecting portion 20 is formed on the surface thereof. According to this embodiment as well, the emission light source 31 can be made thinner.

(Twelfth Embodiment) FIG. 18 is a sectional view showing a light emitting source 32 according to a twelfth embodiment. In this embodiment, a mirror 33 is arranged near the light emitting element 12 in the mold resin 13, and the light emitted from the light emitting element 12 in the side direction is reflected by the mirror 33 to the total reflection area 19, and the total reflection is performed. After the light is totally reflected in the region 19, the light is reflected by the light reflecting portion 20 and emitted forward from the total reflection region 19. The mirror 33 may be formed, for example, on the inner surface of the stem 15 (see FIG. 24).

According to such an embodiment, the light emitting element 1
2, the light emitted in the side direction can be prevented from being directly reflected by the light reflecting portion 20 to become stray light, and the light emitted in the side direction can also be effectively used.
The utilization efficiency of light emitted from the light emitting element 12 can be further improved.

(Thirteenth Embodiment) FIG. 19 is a sectional view showing a light emitting light source 34 according to a thirteenth embodiment. In this embodiment, the light emitting element 12 is provided at a position off the optical axis of the mold resin 13. Since the light emitting element 12 is provided at a position off the optical axis D of the total reflection area 19 or the direct emission area 18, light is emitted from the emission light source 34 in a deviated direction. That is, it is possible to make the directivity characteristics asymmetric in a plane where the light emitting elements 12 are biased.

(Fourteenth Embodiment) FIG. 20 is a sectional view showing a light emitting source 35 according to a fourteenth embodiment of the present invention. The light-emitting light source 35 according to this embodiment has substantially the same structure as the light-emitting light source 26 shown in FIG. 12, but the position of the light-emitting element 12 is the center of the light reflection part 20 and the optical axis D of the direct emission area 18. The difference is that it deviates from

That is, the light emitting element 12 is disposed at a position slightly displaced from the focal point of the direct emission area 18 in a direction perpendicular to the optical axis of the direct emission area 18. At least a region of the light reflecting portion 20 to which the light reflected by the total reflection region 19 reaches is a concave mirror such as a spherical mirror or a rotating parabolic mirror, and the center of the light reflecting portion 20 is the light of the direct emission region 18. It is arranged so as to coincide with the axis D. Moreover, the concave mirror and the light emitting element 12 are connected to the light emitting element 1 with respect to the total reflection area 19.
The second mirror image 12a has a positional relationship such that the mirror image 12a deviates from the focal point of the concave mirror in a plane passing through the focal point of the concave mirror and perpendicular to the optical axis of the concave mirror. In other words, the light emitting element 12 is disposed at a position deviated from the mirror image position of the focal point of the concave mirror with respect to the total reflection area 19.

Therefore, in the light emitting light source 35, the light emitted from the light emitting element 12 is emitted through the direct emission area 18 as substantially parallel light in an oblique direction. Further, light emitted from the light emitting element 12, totally reflected by the total reflection area 19, and further reflected by the light reflecting portion 20 is obliquely emitted in the same direction as substantially parallel light.

(Fifteenth Embodiment) FIG. 21 is a sectional view showing a light emitting source 36 according to a fifteenth embodiment. In this embodiment, a plurality of light emitting elements 12R, 12G (for example, red light emitting diodes, green light emitting diodes, etc.) having different emission colors are sealed in a mold resin 13.

A bullet-shaped light source 37 as shown in FIG.
When a plurality of light emitting elements of a square chip are housed in a mold resin in (Comparative Example), color separation is large, and it differs depending on the viewing direction, and the visibility differs depending on the viewing direction. As shown in (1), by appropriately designing the shapes of the direct emission area 18 and the total reflection area 19, the difference in the degree of color separation depending on the viewing direction can be reduced, and the visibility can be made uniform.

(Sixteenth Embodiment) FIG. 23 is a sectional view showing a light emitting light source 38 according to a sixteenth embodiment. In this embodiment, the optical multilayer film 39 is formed on the entire front surface of the mold resin 13. By forming the optical multilayer film 39 on the front surface of the mold resin 13, light having an incident angle larger than a specific angle is reflected at the interface, and light having an incident angle smaller than the specific angle can be transmitted. Membrane 39
The specific angle can be arbitrarily selected depending on the design, and the degree of freedom in design is increased. The light source from which the optical multilayer film 39 is formed may be, for example, the light source shown in FIGS. 3 to 20 or another light source.

(Seventeenth Embodiment) FIG. 24 is a sectional view showing a light emitting source 41 according to a seventeenth embodiment. Before describing the light emitting light source 41 according to this embodiment, an embodiment for comparison will be described to facilitate understanding.

For example, in the light emitting light source shown in FIGS. 10 and 12, a parabolic cup (light reflecting member) is provided on the stem 15 at the tip of the lead frame 17, and the light emitting element 12 mounted in the stem 15 is provided. Is surrounded by a cup. This is because the light emitted from the side surface of the light emitting element 12 (LED bare chip) is emitted forward of the light emitting light source by being reflected by the inner surface of the cup. Such a cup in the stem has been used in the past, but the conventional cup is almost 4 mm away from the optical axis of the light emitting element.
It was inclined at 5 degrees.

FIG. 27 shows an embodiment in which a conventionally used cup 40 is applied as it is to the light emitting source shown in FIG. The optical axis of the light emitted from the direct emission area 18 is determined by the angle between the light emitting point and the principal point of the direct emission area 18. In the case of light reflected by the cup 40, the cup 40 is used as a virtual light source. You can think of it as light. That is, the mirror image of the light emitting element 12 with respect to the cup 40 is formed in an annular shape near the outer periphery of the inner surface of the cup 40, but since the distance between the light emitting element 12 and the cup 40 is very short, the mirror image of the light emitting element 12 by the cup 40 is , And almost coincides with the cup 40. Therefore, as shown in FIG. 27, the light emitted after being reflected by the cup 40 is at each point (virtual light source) on the surface of the cup 40.
After being emitted from the light emitting element 12 and reflected by the cup 40, the optical axis of the light emitted directly from the emission area 18 is inclined and emitted in an oblique direction.

In a conventional light-emitting light source using this cup 40 (for example, a shell-type light source as shown in FIG. 22),
Since the distance between the light emitting element and the lens is long, the inclination of the optical axis of such outgoing light is small, and there was no significant problem. However, in the light emitting light source according to the present invention, since the distance between the light emitting element 12 and the direct emission area 18 is short, the cup 4
The inclination of the optical axis of the outgoing light reflected at 0 is also large, and the light emitted forward from the light emitting element 12 and the light emitted from the side surface of the light emitting element 12 and reflected by the cup 40 are substantially in the same direction. It is impossible to emit.

As a result, when a conventional cup having an inclination of about 45 ° is used as the light source according to the present invention, the light emitted from the light emitting element 12 is almost light as shown in FIG. The light L1 emitted in the axial direction and the light L2 emitted with a large inclination with respect to the optical axis are mixed. In particular, as the distance from the light source increases, the lights having different emission directions are separated, and a ring-shaped light L2 is generated around the light L1. In addition, the direct emission area 18 is
Since it is not possible to simultaneously design the front light and the side light, lens design is performed for the front light. Therefore, depending on the lens shape design of the direct emission area 18,
The optical axis of the oblique light L2 can hardly be controlled.

The embodiment described here is an improvement of the above-described embodiment by adding a device to the stem 15. The light source 41 shown in FIG.
FIGS. 25A and 25B are a front view and a partially cutaway side view of the lead frame, specifically illustrating a method of improving the light emitting source using a light emitting light source having a structure similar to that of the second embodiment. . Also in this embodiment, at the tip of the lead frame 17,
A stem 15 for mounting the light emitting element 12 is provided, and a light reflection cup 42 is provided around the light emitting element mounting position of the stem 15. The light emitting element 12 is mounted inside the cup 42 on the front surface of the stem 15. Then, as shown in FIG. 26 in which a part of FIG.
The shape of the cup 42 is designed so that the light reflected by 2 does not directly go to the emission region 18 but goes to the total reflection region 19. Specifically, as shown in FIG.
Angle γ of cup 42 with respect to stem bottom inside 2
Is set to about 22 °.

In the light emitting light source 41, the cup 42
24, the light reflected by the cup 42 is directed to the total reflection region 19, so that the light is emitted from the side surface of the light emitting element 12 and reflected by the cup 42, as shown in FIG. After the light is totally reflected by the total reflection area 19, it travels to the light reflection section 20, is reflected by the light reflection section 20, passes through the total reflection area 19, and is emitted forward. Further, the light is emitted from the front surface of the light emitting element 12 and is
The light that has reached the central reflection area 19 is also totally reflected by the total reflection area 19, travels toward the light reflection section 20, is reflected by the light reflection section 20, passes through the total reflection area 19, and is emitted forward. In the light emitted from the front surface of the light emitting element 12, the direct emission area 1
The light that reaches 8 is directly emitted by the lens 18 in the emission area 18 and emitted forward.

As described above, if the light reflected by the cup 42 is totally reflected by the total reflection area 19 and directed to the light reflection section 20, the light path can be freely controlled by the light reflection section 20. Therefore, as shown in FIG.
17, the light reflected by the cup 42 is transmitted to the total reflection area 1
By causing the light-emitting element 12 to be directed, almost all the light emitted from the light-emitting element 12 can be emitted in a desired direction (for example, a direction substantially parallel to the optical axis of the light-emitting element 12). Moreover, according to such an embodiment, it is possible to prevent the light emitting light source 41 from becoming large.

As described above, the optical path can be freely controlled by directing the light reflected by the cup 42 to the total reflection area 19 for the following reason. The light emitted from the front and side surfaces of the light emitting element 12 is
Before reaching 0, the light is reflected by the total reflection area 19 and the optical path is bent.
Since the optical path length to the light-emitting element 1 is increased, the light emitted from the front surface of the light-emitting element 12 and the light-emitting element 1
The light emitted from the side surface 2 and reflected by the cup 42 is
The light comes from almost the same direction. Therefore, control can be performed at the same time, and when the curvature of the light reflecting section 20 is designed, both can be comprehensively designed.

(Eighteenth Embodiment) FIG. 29 is a sectional view showing a light emitting source 43 according to the eighteenth embodiment. This embodiment is of a can package type, in which a transparent mold resin 13 is filled on the front side of the light reflecting section 20,
The back surface of the light reflecting portion 20 is filled with an insulating material 46, and the outer peripheral surface of the insulating material 46 is covered by a cylindrical case portion 44 extending from the outer peripheral portion of the light reflecting portion 20. A flange 45 is provided on the outer periphery.

The stem 15 is formed integrally with the central portion of the light reflecting portion 20.
5, the lead frame 17, the cylindrical case portion 44, and the flange 45 are integrally formed of a metal material.
The lead frame 14 has the tip end of the opening 20 of the light reflecting portion 20.
a.

Therefore, according to this embodiment, the number of parts is reduced, the assembly is easy, and the cost is low. In particular, it can be manufactured in the same process as a general can package product. Furthermore, since the case portion 44 and the flange 45 integrated with the stem 15 are exposed on the surface, the heat dissipation of the heat generated in the light emitting element 12 is improved, and the allowable forward current amount is increased, so that higher brightness is achieved. Becomes possible.

Further, in this embodiment, similarly to the seventeenth embodiment, the cup 42 provided on the stem 15 is emitted from the side surface of the light emitting element 12 and the light reflected by the cup 42 is transmitted to the total reflection area 19. It is designed to head,
The emission direction of the light emitted from the light source 43 can be aligned in one direction.

Next, some embodiments of the light receiver will be described. (Nineteenth Embodiment) FIG. 30 is a perspective view showing the internal structure of a light receiver 51 according to a nineteenth embodiment of the present invention.
Is a sectional view thereof. According to the light receiver 51, a light receiving element 52 such as a chip-shaped photodiode or a phototransistor and a light reflecting portion 53 are sealed in a mold resin 54 made of a translucent resin material. Mold resin 54
The light receiving element 52 sealed therein is mounted on a stem 56 provided at the tip of a lead frame 55, and is connected to another lead frame 58 by a bonding wire 57, and the light receiving surface is arranged forward. Have been.

A direct incident area 59 having a convex lens shape such as a spherical lens shape, an aspherical lens shape, or a parabolic surface is formed at the center of the front surface of the mold resin 54, and the direct incident area 59 is formed around the convex area. , A flat planar region 60 (resin interface) is formed. The direct incidence area 59 is formed such that the central axis thereof coincides with the optical axis of the light receiving element 52, and the plane area 60 is a plane perpendicular to the optical axis of the light receiving element 52. The light receiving element 52 is located at or near the focal point of the direct incident area 59, and the light incident on the direct incident area 59 of the light incident substantially perpendicularly on the light receiver 51 is condensed on the light receiving element 52. The light is received by the light receiving surface of the light receiving element 52.

The light-receiving element 52 directly enters the incident area 59.
Angle α between the optical axis and the direction in which the boundary between the
Is the critical angle θ of total reflection between the mold resin 54 and the air.
It is equal to or larger than c.

The light reflecting portion 53 is formed by forming a metal member into a parabolic shape by press working or the like, and performing a mirror finishing by plating the surface with aluminum or silver. Alternatively, a material having a glossy surface by applying a chemical treatment to a pressed product such as aluminum or silver may be used as the light reflecting portion 53. An opening 61 for accommodating the stem 56 is provided at the center of the light reflecting section 53. With the stem 56 on which the light receiving element 52 is mounted being accommodated in the opening 61, the light reflecting section 53 is connected to the lead frames 55 and 8. In addition, it is sealed in the mold resin 54. The cross-sectional shape of the light reflecting portion 53 is such that light that is perpendicularly incident on the plane region 60 of the mold resin 54 and reflected by the light reflecting portion 53 is
The light is designed to be totally reflected by the light receiving element and then incident on the light receiving element 52.

Accordingly, of the light that has entered the light receiver 51 almost perpendicularly, the light that has entered the direct incidence area 59 is refracted when passing through the direct incidence area 59 and condensed on the light receiving element 52, and The light that has entered the region 60 is reflected by the light reflecting portion 53, then is totally reflected by the planar region 60, and is collected on the light receiving element 52. Therefore, most of the light almost perpendicularly incident on the light receiver 51 can be collected by the light receiving element 52, and the light receiver 51 with high light receiving efficiency can be manufactured. Moreover, the light reflecting portion 53 can be used without depending on the area of the light receiving element 52.
The light receiving area can be increased and the amount of received light can be increased simply by increasing the amount of light, so that the amount of received light and the light receiving efficiency can be increased at low cost. Furthermore, a thin light receiver 51 can be obtained without increasing the thickness by increasing the light receiving efficiency.

Further, according to the light receiver 51 having such a structure, it is only necessary to set the light reflecting portion 53 which is an individual component together with the light receiving element 52 and the stem 56 in the molding die. Can be simplified.

In addition, the corner of the outer peripheral surface of the light reflecting portion 53 is made to coincide with the corner of the mold resin 54. For this reason, when molding the mold resin 54, the outer peripheral angle of the light reflecting portion 53 on the reflection surface side can be set in a state of being in contact with the inner surface of the cavity of the molding die, and the light reflecting portion 53 is positioned. As a result, it can be inserted into the mold resin 54 with high accuracy, and the mounting accuracy of the light reflecting portion 53 increases.

(Twentieth Embodiment) FIG. 32 is a sectional view of a light receiver 62 according to a twentieth embodiment. In this embodiment, a direct incident area 59 is provided at the center of the surface of the mold resin 54, and a conical (truncated) or pyramidal (truncated) shape is formed around the direct incident area 59 so as to be depressed on the center side. A tapered portion 63 is provided, and a flat planar region 60 is provided outside the tapered portion 63. The central axis of the tapered portion 63 coincides with the optical axis of the light receiving element 52, and the plane region 60 is a plane perpendicular to the optical axis of the light receiving element 52.

Thus, in the light receiver 62, the light directly incident on the incident area 59 is incident on the light receiving element 52 while being refracted. The light reflecting portion 53 reflects the light that has entered the plane region 60 almost perpendicularly, and further reflects the light in the plane region 60 completely, so that the light enters the light receiving element 52. The tapered portion 63 is totally reflected in a direction away from the light receiving element 52 when light incident from the plane region 60 and reflected at the outer peripheral portion of the light reflecting portion 53 is totally reflected near the direct incidence region 59. The light does not enter the light receiving element 52. Therefore, according to this embodiment, the light receiving efficiency can be further improved. Also,
By providing the tapered portion 63, the direct incidence area 5
9 can be made shorter, and the light receiver 62 can be made thinner.

In the case of such a structure, the light receiving element 52
Makes it possible to make the angle α between the optical axis and the direction in which the boundary between the incident region 59 and the tapered portion 63 is directly smaller than the critical angle θc of total reflection between the mold resin 54 and air.

(Twenty-First Embodiment) FIG. 33 is a perspective view showing a photodetector 64 according to a twenty-first embodiment, which is used as a solar cell. In this light receiver 64 (solar cell), a light reflecting portion 53 having a substantially parabolic cross section having a uniform cross section in the longitudinal direction is sealed in a mold resin. A light receiving element 52 (a photoelectric conversion element composed of an amorphous, polycrystalline or single crystal silicon-based photoelectric conversion element) is provided on the front surface of the light reflecting section 53 along the longitudinal direction. At the center of the front surface of the mold resin 54, a cylindrical lens-like direct incidence area 59 is formed along the longitudinal direction, and flat planar areas 60 are formed on both sides thereof.

Thus, also in the light receiver 64, of the light vertically incident on the light receiver 64, the light incident on the direct incidence area 59 is directly condensed on the light receiving element 52. Further, the light incident on the plane region 60 is reflected by the light reflecting portion 53, and is further totally reflected by the plane region 60 and received by the light receiving element 52. Furthermore, since the light receiving element 52 has a long shape on one side, the light receiving area can be made very large, a large amount of light can be collected, and a high power generation capacity can be obtained as a solar cell.

At present, the energy conversion efficiency of a solar cell is as low as 15%. Therefore, if the power generation capacity is to be increased, the area of the photoelectric conversion element itself must be increased, and the cost is high. On the other hand, the light receiver 6 of the present invention
According to 4 (solar cell), the light receiving area can be increased by increasing the entire area of the light receiving device 64 without increasing the area of the photoelectric conversion element itself, and the light incident on the light receiving surface can be efficiently used. Since the light can be collected well in the light receiving element 52, the power generation capacity can be increased by inexpensive means.
In particular, according to the structure as in this embodiment, the light-collecting efficiency can be increased twice or more, and the substantial energy conversion efficiency can be increased twice or more.

Further, according to the light receiver 64, the efficiency can be improved while keeping the thickness low. Therefore, even when the light receiver 64 is applied to a solar panel, a road stud, a delineator, etc. to be mounted on a roof of a house, it is required to be thin. I can respond.

In the light receiver 64 having the configuration as shown in FIGS. 30 and 31, a photoelectric conversion element may be mounted as the light receiving element 52.

(Twenty-second Embodiment) FIG. 34 is a perspective view of a light-emitting light source 65 according to a twenty-second embodiment, FIG. 35 (a) is a front view thereof, and FIG. FIG. 35C is a cross-sectional view taken along line X1-Y1 of FIG. 35A. According to this embodiment, a light emitting element 12 such as a light emitting diode (LED chip) is sealed in a mold resin 13 made of a translucent resin material. The light emitting element 12 sealed in the mold resin 13 is mounted on a stem 15 provided at the tip of a lead frame 17 and connected to the other lead frame 14 by a bonding wire 16 to emit light on the light emitting side. It is arranged toward the front of the light source 65.

The light reflecting portion 20 is formed by forming a metal member into a parabolic shape by press working or the like, and the surface thereof is mirror-finished by plating with aluminum or silver. Alternatively, a material having a glossy surface by applying a chemical treatment to a pressed product such as aluminum or silver may be used as the light reflecting portion 20. An opening 20a for accommodating the stem 15 is provided at the center of the light reflecting section 20, and the stem 15 on which the light emitting element 12 is mounted is connected to the opening 20a.
a, the light reflecting portion 20 is connected to the lead frame 14.
And 17 are sealed in the mold resin 13.

As shown in FIG. 35 (a), the light reflecting portion 20 has a major axis direction and a minor axis direction when viewed from the front, and has a substantially elliptical shape in this embodiment. I have. Also, since the outer peripheral edge of the light reflecting portion 20 is formed so as to be parallel to the front surface of the mold resin 13, the light reflecting portion 20
A large gap does not occur between the outer peripheral edge of the mold resin 13 and the front surface of the mold resin 13, and it is possible to prevent light from leaking from this gap to cause loss.

FIG. 35 (b) shows a cross section in the major axis direction and FIG.
The cross sections in the minor axis direction shown in FIG. 5C are all concavely curved, but have different shapes. That is,
The distribution range of the curvature of the cross section in the long axis direction and the distribution range of the curvature of the cross section in the short axis direction are different from each other.
That is, the curvature distribution of the cross section in the long axis direction is shifted to a smaller value side than the curvature distribution of the cross section in the short axis direction.

For example, assuming that the cross section of the light reflecting portion 20 is a circular arc in both the cross section in the long axis direction and the cross section in the short axis direction, the radius of the cross section in the long axis direction is Rl, and the radius of the cross section in the short axis direction is R1. Where, (1 / Rl) <(1 / Rs) That is, the radius Rl in the long-axis direction cross section is larger than the radius Rs in the short-axis direction cross section (Rl> R).
s).

When the cross section of the light reflecting portion 20 is not a circular arc, the curvature varies depending on the location in both the long-axis cross section and the short-axis cross section, so that the light reflection portion 20 has a spread (distribution). In such a case, it can be characterized by the center value of the curvature distribution, for example. That is, it is assumed that the minimum value of the curvature in the long-axis direction cross section is (ρl) min and the maximum value is (ρl) max, and the minimum value of the curvature in the short-axis direction cross section is (ρs) min and the maximum value is (ρs) ma.
x, the respective center values (ρl) c, (ρ
s) c is the major axis direction: (ρl) c = ｛(ρl) min + (ρl) m
ax｝ / 2 Short axis direction: (ρs) c = ｛(ρs) min + (ρs) m
ax｝ / 2. In the light reflecting portion 20 used in the light-emitting light source 65 according to the present invention, the center value (ρl) c of the curvature in the long-axis section is smaller than the center value (ρs) c of the curvature in the short-axis section, (Ρl) c <(ρs) c.

Alternatively, the distribution may be characterized by both ends of the curvature distribution, that is, the minimum value and the maximum value, and (ρl) min ≦ (ρs) min (ρl) max ≦ (ρs) max. However, this equal sign shall not hold at the same time.

A direct emission area 18 having a convex lens shape is formed at the center of the front surface of the mold resin 13, and a planar total reflection area 19 is formed around the direct emission area 18 so as to surround the direct emission area 18. I have. The direct emission region 18 is formed so that the optical axis thereof coincides with the optical axis of the light emitting element 12, and the total reflection region 19 is
Is a plane perpendicular to the optical axis. The light emitting element 12 is located at or near the focal point of the direct emission area 18. The angle formed by the direction in which the boundary between the light-emitting element 12 and the direct emission area 18 and the total reflection area 19 forms an optical axis is equal to or less than the critical angle θc of total reflection between the mold resin 13 and air. Is bigger than.

When viewed directly from the front, the lens-like direct emission region 18 is also substantially elliptical having a major axis direction and a minor axis direction as shown in FIG. The short-axis direction corresponds to the long-axis direction and the short-axis direction of the light reflection unit 20, respectively. Also in the direct emission region 18, the distribution range of the curvature of the cross section in the long axis direction and the distribution range of the curvature of the cross section in the short axis direction are different from each other.
The curvature distribution of the cross section in the long axis direction is shifted to a smaller value side than the curvature distribution of the cross section in the short axis direction. Here, the fact that the curvature distribution of the cross section in the long axis direction in the direct emission region 18 is shifted to a smaller value side than the curvature distribution of the cross section in the short axis direction has the same meaning as in the case of the light reflection unit 20. .

Thus, of the light emitted from the light emitting element 12, the light radiated to the direct emission area 18 is substantially collimated and directly emitted from the front surface of the mold resin 13 to the front. Also, of the light emitted from the light emitting element 12,
The light emitted to the total reflection area 19 is totally reflected at the resin interface, and substantially all of the light totally reflected at the resin interface is
By being reflected at 0, the light is emitted forward from the total reflection area 19. Therefore, almost all the light emitted from the light emitting element 12 to the front side (that is, the light totally reflected by the total reflection area 19) can be extracted in front of the light emitting light source 65, and the light use efficiency can be increased. Can be. Moreover, the light emitted forward from the light emitting element 12 is directly emitted from the emission area 18 without being blocked by anything, so that the optical axis is not darkened as in the above-described conventional example, and the directional characteristics are not increased. Is improved.

Further, the light emitted from the light emitting element 12 in the oblique direction is totally reflected by the total reflection area 19 and
Even if it is 0, it is reflected and emitted forward, so the optical path length becomes longer, and the aberration can be reduced by that much, so that the light emitting source 65 can be made more precise.

Further, since the light reflecting portion 20 has a substantially elliptical shape, the light reflected at the light reflecting portion 20 and emitted forward also has an approximately elliptical emission profile as shown in FIG. It becomes a beam. Moreover, since the direct emission region 18 also has a substantially elliptical shape and the major axis direction coincides with the major axis direction of the light reflecting portion 20, the light beam emitted from the direct emission region 18 also has a substantially elliptical cross section, As shown in FIG. 37, the light emitted from the direct emission area 18 is
Complementing the light emitted from the LED 9 and combining the light emitted from the direct emission area 18 with the light emitted from the total reflection area 19, the emission light having an almost uniform intensity elliptical profile is realized.

In order to emit substantially elliptical light spread in one direction, a hemispherical metal member having a constant curvature in an arbitrary direction is prepared, and the left and right sides thereof are cut vertically. Considering the elongated light reflecting portion, a large gap is generated between the cut portion and the front surface of the mold resin, and light leaks from this portion, and the light use efficiency deteriorates. In contrast, by making the curvature different depending on the direction, such a gap can be reduced, and the luminance of the light emitting light source 65 can be increased. Further, in the light reflecting portion 20 having a circular shape when viewed from the front, if the curvature is changed in two orthogonal directions, the spread of the reflected light can be changed, so that the substantially elliptical profile expanded in one direction. Outgoing light can be obtained. However, by making the light reflecting portion 20 also elliptical, the design of the light reflecting portion 20 becomes easy.

In particular, the light reflecting portion 20 can be realized as an aspheric toric surface or a biconic surface, and a more uniform beam profile can be designed. FIG.
FIG. 38A shows the light reflecting portion 20 formed of a biconic surface. As shown in FIG. 38B, the X axis extends in the major axis direction, the Y axis extends in the minor axis direction, and the forward direction. When taking the Z axis, the light reflecting surface of the light reflecting portion 20 having the biconic surface is represented by the following equation (1).

[0141]

(Equation 1)

However, when the cross-sectional shape of this biconic surface in the XZ plane is represented by Z = g1 (X), the curvature of this curve is cv, the conic coefficient is cc, and the cross-sectional shape in the YZ plane is Z = g2 ( Y), the curvature of this curve is cvx (≠ cv), and the conic coefficient is ccx
And Further, a, b, c, and d are all higher order coefficients.

(Twenty-third Embodiment) FIG. 39A shows the second embodiment.
FIG. 39 is a front view showing a light emitting source 66 according to the third embodiment;
(B) and FIG. 39 (c) are a sectional view taken along line X2-X2 and a sectional view taken along line Y2-Y2 of FIG. 39 (a). In this embodiment, the light reflecting portion 20 is formed in a rectangular shape in a front view, and is formed so as to be concavely curved in a cross section in a long axis direction and a short axis direction. The light emitting light source 66 is sealed in the resin 13 so that the outer shape of the light emitting light source 66 is rectangular when viewed from the front.

Even with the light emitting source 66 having such a shape, the first
As in the fifth embodiment, a uniform light beam having a substantially elliptical profile can be emitted as shown in FIG.

(Twenty-fourth Embodiment) FIG. 41A shows the second embodiment.
FIG. 41 is a front view showing a light emitting light source 67 according to the fourth embodiment.
(B) and FIG. 41 (c) are a sectional view taken along line X3-X3 and a sectional view taken along line Y3-Y3 of FIG. 41 (a). In this embodiment, as shown by a two-dot chain line in FIGS. 41 (a), (b), and (c), the four-sided light reflecting portion 68 having an elliptical front shape is cut into substantially rectangular light. The reflection unit 20 is used. Then, this is sealed in a mold resin 13 molded into a rectangular shape, so that the outer shape of the light emitting light source 67 is also rectangular when viewed from the front.

According to the light-emitting source 67 having such a structure,
As shown in FIG. 42, a light beam having a profile closer to a rectangular shape can be emitted. In applications such as a high-mount strap lamp mounted on a vehicle, it may be desired to irradiate a uniform beam into a limited rectangular area. Therefore, the light-emitting light source 67 is desirable for such an application.

In the conventional light emitting light source (LED), when designing the beam profile (directivity), only the curvature of the lens surface and the distance between the LED chip and the lens surface are used as parameters, and the optical axis Although the light emitting light source had to be thicker in the direction, in the light emitting light source according to the present invention, a more flexible design is possible depending on the shape of the light reflecting portion.
Can be obtained. That is, according to the light-emitting sources of the twenty-second to twenty-fourth embodiments (FIGS. 34 to 42), it is possible to realize a light-emitting light source that is thin and can emit light in a wide range. For example, a light-emitting light source 67 according to this embodiment is particularly effective for an application such as a high-mount strap lamp in which the space (especially the depth) allowed for the optical system is small but light needs to be irradiated to a wide area. Becomes

(Twenty-Fifth Embodiment) FIG. 43A is a front view showing a light emitting light source 69 according to a twenty-fifth embodiment, and FIG.
FIG. 3B is a sectional view taken along line X4-X4 of FIG.
FIG. 43 (c) is a sectional view taken along line Y4-Y4 in FIG. In a light emitting light source 69 shown in FIG. 43, a tapered portion 19b having a tapered shape is formed around the direct emission region 18, and a flat portion 19a is formed around the tapered portion 19b.
The angle between the tapered portion 19b and the light emitting direction of the optical axis of the light emitting element 12 is smaller than 90 degrees, and the flat portion 19a is perpendicular to the optical axis. Here, in the direction in which the boundary between the tapered portion 19 b and the flat portion 19 a is viewed from the light emitting element 12, the angle formed with the optical axis of the light emitting element 12 is larger than the critical angle θc of total reflection at the interface of the mold resin 13. By doing so, the light incident on the flat portion 19a is totally reflected, and the light incident on the boundary between the tapered portion 19b and the direct emission area 18 is also totally reflected by the tapered portion 19b. If the inclination angle of 19b is set, all the light incident on the tapered portion 19b is totally reflected. Therefore, the tapered portion 19b and the flat portion 19
a becomes the total reflection area 19, and the light in the area that cannot be totally reflected by the flat portion 19a can be totally reflected by the tapered portion 19b.
By reflecting the light at 0 and moving it forward, the light emission efficiency of the light emitting source 69 is improved.

When the light reflecting portion 20 having a substantially elliptical shape when viewed from the front is designed, particularly when the light emission profile and efficiency in the long axis direction are emphasized, light emission in the short axis direction is not performed. The light emitted from the element 12 is the mold resin 1
There is a case where the area (total reflection area 19) totally reflected at the interface of No. 3 becomes narrow or disappears.

In such a case, it is effective to form the tapered portion 19b. Moreover, as shown in FIG. 43, for the tapered portion 19b formed to increase the total reflection area, the ratio occupied by the tapered portion 19b in the short axis direction is larger than the ratio occupied by the tapered portion 19b in the long axis direction. Then, when the light emitting light source 69 is viewed from the front, the outer shape of the tapered portion 19b may not be similar to the outer shape of the direct emission region 18 or the light reflecting portion 20.
In some cases, the directions of the major axis and the minor axis of the outer shape of the tapered portion 19b viewed from the front may be the direct emission region 18 or the light reflection portion 2.
It may be reversed from 0 in some cases. With such a configuration, it is possible to improve the efficiency of the light emitting light source 69 in the short axis direction.

In the case where the design is made with emphasis on the light emission profile and efficiency in the short-axis direction, or when there is a restriction due to the outer shape of the light source 69 or the light emission profile, FIG.
4, there is a case where the light emitting element 12 needs to be close to the resin interface. In such a case, as shown in FIG. 45A, at the end of the resin interface in the long axis direction, the emission angle of the light emitted from the light emitting element 12 (the angle formed with the optical axis) is, for example, 70. The angle may be as large as degrees or more. Since the light having such an angle has low intensity, the light intensity at the outer peripheral portion of the LED becomes small, and the luminance of the light source 69 becomes uneven.

In such a case, as shown in FIG. 45 (b), the angle of the tapered portion 19b in the cross section in the long axis direction is set to be equal to or larger than the angle satisfying the total reflection angle. By making the totally reflected light reach the edge of the resin interface, the brightness at the edge of the resin interface is improved,
The brightness of the light source 69 can be made substantially uniform. Also in this case, the outer shape of the tapered portion 19b when the light emitting light source 69 is viewed from the front is not necessarily analogous to the outer shape of the direct emission region 18 or the light reflecting portion 20, and the ratio of the long axis to the short axis is different. The shape may be larger.

Although not shown, a shape having a major axis direction and a minor axis direction as viewed from the front as shown in FIG. 34 and subsequent figures can be applied to a light receiver.

(Twenty-Sixth Embodiment) FIGS. 46A and 46B
FIGS. 29A and 29B are a front view and a sectional view showing a light emitting light source 71 according to a twenty-sixth embodiment. The light emitting light source 71 includes a circuit board 73.
The chip-type light-emitting element 12 such as an LED chip mounted on the device is disposed so as to cover a disc-shaped optical module (optical component) 72.

The optical module 72 is obtained by insert-molding the light reflecting portion 20 in the molding resin 13. On the surface of the molding resin 13, the direct emission region 18 and the total reflection region 19 in the form of a convex lens are formed. ing. On the back surface of the mold resin 13, an element mounting portion 74 having a concave shape so as to enter the opening 20 a is formed at a position corresponding to the opening 20 a of the light reflecting portion 20. When the light emitted from the light emitting element 12 enters the optical module 72, the element mounting portion 74 is substantially perpendicular to the light in each direction so as not to bend the optical axis thereof. Is formed. The light source 71 is configured such that the optical module 72 is placed on a chip-type light emitting element 12 of a surface mount type mounted on a circuit board 73, and the light emitting element 12 is accommodated in an element mounting portion 74. At this time, if the dimensions of the element mounting portion 74 are matched with the outer dimensions of the light emitting element 12, the alignment between the light emitting element 12 and the optical module 72 becomes easy, and the assembly can be performed efficiently.

By using such an optical module 72, as described above, the molding resin 13 can be used.
The same operation and effect as the light emitting light source having the light emitting element 12 embedded therein can be obtained. That is, as shown in FIG. 46B, the light emitted forward from the light emitting element 12 is
The light enters the mold resin 13 from the element mounting portion 74, advances through the mold resin 13, and is directly emitted from the emission region 18 to the front. Light emitted in a diagonal direction from the light emitting element 12 enters the mold resin 13 from the element mounting part 74,
The light travels through the mold resin 13 to reach the total reflection area 19, is totally reflected by the total reflection area 19, is reflected by the light reflection section 20, passes through the total reflection area 19, and is emitted forward. Therefore, by using the optical module 72 that is larger than the light emitting element 12, the light of the light emitting element 12 can be spread over a larger area than the size of the light emitting element 12 and emitted from the optical module 72. The area can be increased.

The optical loss caused by covering the optical module 72 also includes loss at the time of entering the optical module 72, Fresnel loss at the time of exiting from the front surface of the mold resin 13, and slight reflection by the light reflecting portion 20. This is only a loss, and about 90% of the light emitted from the light emitting element 12 is efficiently emitted forward from the optical module 72.

Furthermore, the direction of emission from the light emitting light source 71 using the optical module 72 can be freely designed, and can be made spatially smaller than when a similar effect is obtained by using a lens. In many applications using LED chips, there are many cases where there are many spatial restrictions.
It is effective to use.

Further, according to such an optical module 72, it can be used for the light emitting element 12 already mounted on the circuit board 73, so that the light emitting area of the light emitting element 12 can be increased in size or increased in efficiency by retrofitting. be able to.

In this embodiment, an example using an LED chip has been described.
The same effect can be obtained by applying the D chip to a light source such as a light bulb or a fluorescent lamp.

(Twenty-Seventh Embodiment) FIG. 47 is a front view showing a light emitting light source 75 according to a twenty-seventh embodiment. In this light emitting light source 75, for example, a rectangular optical module 72 having a major axis direction and a minor axis direction is used. When such an optical module 72 is used, the light spread in the major axis direction and the minor axis direction are different, so that the emitted light having a rectangular or elliptical profile can be realized.
The light emitting light source 75 corresponding to the twenty-second embodiment (FIG. 34) can be manufactured using FIG.

In addition, by changing the structure of the optical module 72, it is possible to provide the same functions as those of the various light emitting sources described above.

(Twenty-eighth Embodiment) FIG. 48 is a perspective view showing a light receiver 76 according to a twenty-eighth embodiment, and FIG. 49 is a sectional view thereof. In this embodiment, an optical module 77 is put on the light receiving element 52 mounted on the circuit board 73, and the light receiving element 52 is accommodated in the element mounting portion 78 to constitute the light receiver 76. The type of the light receiving element 52 is not particularly limited, and can be applied to a general photodiode, a phototransistor, or the like, such as one having a lead 50a in a form as shown in FIGS. 50 (a) and 50 (b). .

This optical module 77 is also a mold resin 5
The light-reflecting portion 53 is insert-molded in the mold resin 4, and a convex lens-shaped direct incidence area 59 and a plane area 60 are formed on the surface of the mold resin 54. Also,
An opening 61 of the light reflecting portion 53 is provided on the back surface of the mold resin 54.
At a position corresponding to the above, an element mounting portion 78 having a concave shape is formed so as to enter into the opening 61. The element mounting portion 78 is also provided from the optical module 77 to the light receiving element 52
In order not to bend the optical axis of the light incident on the lens, the light is substantially perpendicular to the light in each direction and is formed in a substantially hemispherical shape.
The light receiver 76 is configured such that the optical module 77 is put on the light receiving element 52 mounted on the circuit board 73 and the light receiving element 52 is accommodated in the element mounting portion 78. At this time, if the dimensions of the element mounting portion 78 are matched with the outer dimensions of the light receiving element 52, the positioning of the light receiving element 52 and the optical module 77 becomes easy, and the assembly can be performed efficiently.

In the light receiver 76, the light incident on the direct incidence area 59 of the optical module 77 travels in the mold resin 54, exits from the element mounting portion 78, and enters the light receiving element 52. Further, the light that enters the plane area 60 of the optical module 77 travels inside the mold resin 54 and is reflected by the light reflecting portion 53 toward the plane area 60, and
After the light is totally reflected by the light receiving element 5
2 is incident. Therefore, the optical module 77 functions as a large-area lens, and by using the optical module 77 that is larger than the light-receiving element 52, a large-area light can be transmitted to the light-receiving element 52.
Can be received.

If a similar effect is to be obtained by using a lens, a large spatial area is required.
The use of the optical module 77 enables a reduction in thickness.

Also in the case of a light receiver, by changing the structure of the optical module 77, it becomes possible to have the same function as the various light receivers described above.

Although the optical module 72 for the light emitting light source and the optical module 77 for the light receiver are described separately here, they can be shared with each other.

(29th Embodiment) FIG. 51 is a sectional view showing a light emitting source 79 according to a 29th embodiment. In this embodiment, the light reflection part 20 is not inserted in the optical module 72 that covers the light emitting element 12. Instead, a reflection type Fresnel lens-shaped pattern 80 is formed on the back surface of the mold resin 13, and a reflection film 81 made of a metal deposition film is formed on the surface of the pattern 80. Also,
A cylindrical support portion 82 is formed integrally with the outer periphery of the mold resin 13 to stabilize the surface of the circuit board 73.

With such a structure, an effect similar to that of the twenty-seventh embodiment (FIG. 46) can be obtained. Moreover, since it is not necessary to insert-mold the light reflecting portion 20 in the mold resin 13, the number of components can be reduced, and the cost can be reduced. In addition, when the optical module 72 is molded, the positioning of the light reflecting portion 20 is not required, and the molding process of the optical module 72 can be made more efficient.

(Thirtieth Embodiment) FIG. 52 is a sectional view showing a light emitting light source 83 according to a thirtieth embodiment. In this embodiment, the emission region 18 is formed slightly directly at the center of the surface of the mold resin 13, and the majority is formed in the total reflection region 19.
And In addition, the direct emission area 18 is constituted by a shallow concave portion.

In this embodiment, the light emitted forward from the light emitting element 12 is totally reflected by the total reflection area 19 as much as possible, and the emission direction can be controlled by the light reflection section 20. According to this embodiment, by increasing the controllability of the emitted light, when the direct emission area 18 in the form of a convex lens cannot be formed due to space or restrictions, the light emitted from the light emitting element 12 has a deviated directivity. If it has an angle and is not close to the Lambertian distribution, if it is difficult to emit light in a desired direction in the convex lens-like direct emission area 18, it is necessary to increase the area, and to increase the area in the direction of the end face of the optical module 72. It is possible to cope with each case such as a case where light is to be distributed.

(Thirty-First Embodiment) FIG. 53 is a sectional view showing a light emitting light source 84 according to a thirty-first embodiment. In this embodiment, the direct emission area 18 and the total reflection area 1
9 is formed in a planar shape. Also, the optical module 72
As shown in FIG. 54, the element mounting portion 74 has a spherical portion 74a and a mold resin 13 extending forward from the center thereof.
It consists of a narrow recess 74c that has entered inside. Further, a boundary portion 74b between the spherical portion 74a and the depression 74c is smoothly curved. Spherical portion 74a and depression 74c
Are formed so as to be substantially perpendicular to the direction of the light emitted from the light emitting element 12, but the boundary 74
b is inclined with respect to the direction of the light emitted from the light emitting element 12.

However, the light emitting element 12
The light emitted forward from the device proceeds forward without change in the optical axis direction and exits as it is. Thus, when the light emitting light source 84 is viewed from the front, light is emitted from the center. At the boundary portion 74b, the light emitted forward from the light emitting element 12 is refracted and bent toward the total reflection area 19, and the light reflection section 20 controls the emission direction. Spherical part 74a
In this case, the light emitted from the light emitting element 12 in the oblique direction travels in the direction of the total reflection area 19 with almost no change in the optical axis direction, is reflected by the light reflection section 20, and the emission direction is controlled. According to such a configuration, similarly to the thirtieth embodiment (FIG. 52), light emitted forward from the light emitting element 12 is totally reflected by the total reflection area 19 as much as possible, and the light reflection section 20 is formed.
Can control the light emission direction. Further, the recess 74c prevents the central portion of the light emitting light source 84 from being dark when viewed from the front.

(Thirty-second Embodiment) FIG. 55 is a sectional view showing a light-emitting source 85 according to a thirty-second embodiment. Also in this embodiment, the direct emission region 18 and the total reflection region 1
9 is formed in a planar shape. Also, the optical module 72
The element mounting portion 74 has a truncated cone shape.

If the optical module 72 having the element mounting portion 74 having such a shape is used, the light emitted from the light emitting element 12 to the top surface of the element mounting portion 74 is emitted forward without changing the direction. As shown in FIG. 56, of the light emitted from the light emitting element 12 to the inclined surface of the element mounting portion 74, the light L4 near the top surface is refracted toward the total reflection area 19 (this light L4 is spherical. In the case of the element mounting portion 74 having the shape of
Go straight as indicated by the broken line. ), The emission direction is controlled by the light reflection unit 20. The light L <b> 5 that is perpendicularly incident on the inclined surface of the element mounting section 74 from the light emitting element 12 goes straight, is totally reflected by the total reflection area 19, and the light reflection section 20 controls the emission direction. Therefore, in this embodiment, the same effect as in the thirty-first embodiment can be obtained.

Further, the light L6 emitted from the light emitting element 12 in the lateral direction (at an angle of about 70 ° or more with respect to the optical axis)
In the case of the spherical element mounting portion 74, as shown by the broken line, the light directly hits the light reflecting portion 20 and is reflected and spreads outward, but in the case of the truncated conical element mounting portion 74, The light is refracted by the inclined surface of the element mounting portion 74 and goes straight to enter the total reflection area 19, where 1
After being totally reflected at 9, the light is reflected by the light reflecting portion 20 and emitted forward.

(Thirty-third Embodiment) FIG. 57A is a sectional view of a light emitting source 311 in which a light emitting element 313 is mounted on an optical module 312 according to a thirty third embodiment of the present invention.
The light emitting element 313 has an LED chip 316 mounted on a stem 315 provided at the tip of a lead 314, and a bonding wire 3 between the LED chip 316 and the lead 317.
In this case, the material bonded by 18 is molded into a shell shape with a transparent mold resin 319. The light emitting element 313 is a conventionally known light emitting element, and a commercially available light emitting element can be used.

As shown in FIG. 57B, the optical module 312 is formed by insert-molding a light reflecting member 321 inside a transparent resin 320. Optical module 312
Has an annular or donut-shaped appearance, and a central through hole (opening) 322 is an element mounting position for mounting the light emitting element 313. Light reflecting member 321
Is formed by pressing a metal part into a parabolic shape by press working or the like. The center part is opened corresponding to the through hole of the optical module 312, and the surface is mirror-finished by plating with aluminum or silver. Things. Alternatively, the light reflecting member 321 may be made of a pressed product such as aluminum or silver that has been given a glossy surface by performing a chemical treatment. Further, the outer peripheral edge or the inner peripheral edge of the light reflecting member 321 is located at the outer peripheral corner or the inner peripheral corner of the transparent resin 320 because the light reflecting member 321 is formed of metal when the light reflecting member 321 is insert-molded into the transparent resin 320. This is to facilitate positioning of the light reflecting member 321 in the mold.

The light emitting element 313 is mounted in a through hole 322 which is an element mounting position of the optical module 312. The light emitting element 313 and the optical module 312 are housed in a case 323, and the case 323 is filled with a transparent resin 324. The space between the inner peripheral surface of the through hole 322 of the optical module 312 and the light emitting element 313 is filled with a transparent resin 324 to be integrated to form a light emitting light source 311.

Thus, the light emitted forward from the LED chip 316 of the light emitting element 313 is emitted directly forward from the light emitting element 313 as shown in FIG. Light emitted in an oblique direction from the LED chip 316 exits from the side surface of the light emitting element 313 and enters the optical module 312 through the through hole 322, and enters a planar total reflection area (resin interface) which is the front surface of the transparent resin 320. The total reflection area 325 of the transparent resin 320 is reflected by the light reflection member 321 by being totally reflected by the light reflection member 321.
5 forward. Further, the LED chip 316
The light emitted in the lateral direction from the side exits from the side surface of the light emitting element 313, enters the optical module 312 through the through hole 322, and
The light is reflected by the light reflecting member 321 and is emitted forward from the total reflection area 325 of the transparent resin 320.

According to such a light emitting source 311, LE
Light emitted from the D chip 316 in an oblique direction or a lateral direction can also be emitted forward by being reflected by the total reflection area 325 and the light reflecting member 321, so that the available light emission angle, that is, the viewing angle α, can be reduced. It can be made larger and a brighter light distribution can be obtained. Further, the optical module 312 is arranged close to the light emitting element 313,
Since the light emitted from the light emitting element 313 is reflected by the total reflection area 325 and the light reflecting member 321 and emitted forward, the optical system does not become spatially large and the light emitting light source 311 can be downsized. Can be. In addition, the light emitting direction can be freely designed depending on the shape of the light reflecting member 321.

In the light emitting source 311, since the optical module 312 and the light emitting element 313 are separate components, quality control can be individually performed.
Eleven defective products can be reduced.

(Thirty-Fourth Embodiment) FIG. 58 is a thirty-fourth embodiment of the present invention, and is a sectional view of a light source 326 in which a light emitting element 313 is mounted on an optical module 327. In this embodiment, a bullet-shaped light emitting element 313 is inserted into a through hole 322 of a ring-shaped optical module 327, and a transparent resin is filled between the inner peripheral surface of the optical module 327 and the light emitting element 313 to emit light. Module 312 and light emitting element 313
Are integrated by bonding. Thus, between the optical module 312 and the light emitting element 313, the molding resin 31
By filling a transparent resin having the same refractive index as that of the transparent resin 9 or the transparent resin 320, light loss due to Fresnel loss or the like can be reduced.

Further, with such a structure, the case 323 is not required as compared with the light emitting light source 311 according to the thirty-third embodiment, so that the light emitting light source 326 can be downsized.

(Thirty-Fifth Embodiment) FIG. 59 is a thirty-fifth embodiment of the present invention, and is a cross-sectional view of a light-emitting light source 328 in which a heat-dissipating light-emitting element 329 is mounted on an optical module 327. The heat-dissipation type 329 used here has an LED chip 316 mounted on a heat sink 330 having high thermal conductivity, and the outer peripheral surface and the upper surface of the heat sink 330 are covered with a transparent mold resin 332. In order to enhance the heat radiation of the heat sink 330, a concave portion 331 is provided on the lower surface of the heat sink 330 to increase the heat radiation area. In this heat radiation type light emitting element 329,
At the center of the mold resin 332, the LED chip 3
A lens portion 333 having a convex lens shape is provided so as to face the lens portion 16.

In this type of light emitting element 329, only the lens portion 333 is inserted into the through hole 322 of the optical module 327 and assembled, and the space between the lower surface of the optical module 327 and the periphery of the lens portion 333 of the light emitting element 329 is provided. Has a small gap ε.

By combining such a heat radiation type light emitting element 329 and the optical module 327, a brighter light distribution can be obtained without impairing the heat radiation.

(Thirty-Sixth Embodiment) FIG. 60 is a thirty-sixth embodiment of the present invention, and is a cross-sectional view of a light emitting light source 341 in which an optical module 342 is mounted on a bullet-shaped light emitting element 313. In the light emitting source 341, the through hole 322 of the optical module 342 does not have a straight opening, but has a shape along the outer shape of the light emitting element 313.

In this embodiment, when the light-emitting element 313 is inserted into the through hole 322 of the optical module 342, the light-emitting element 313 and the optical module 342 are easily aligned exactly, and the insertion depth of the light-emitting element 313 varies. Can be eliminated. Therefore, assembling becomes easy,
Production costs can be reduced. In this embodiment, the light emitting element 313 can be mounted on the optical module 342 by press fitting.

(Thirty-Seventh Embodiment) FIG. 61 is a thirty-seventh embodiment of the present invention, and is a cross-sectional view of a light-emitting light source 343 in which a bullet-type light-emitting element 313 is mounted on an optical module 344. In the light emitting light source 343, a convex portion 345 having a substantially triangular cross section is provided on the upper surface of the optical module 344 so as to surround the through hole 322, and the inclined surface of the convex portion 345 is higher inside.

In this embodiment, since the convex portion 345 is provided on the through hole 322 and is inclined so that the surface of the convex portion 345 protrudes on the inner peripheral side, the convex portion 345 totally reflects light. And the light incident on the convex portion 345 is
5 is easier to emit. Therefore, a dark portion is less likely to be generated between the light emitted from the lens portion (spherical portion) 346 of the light emitting element 313 and the light emitted from the total reflection area 325 after being reflected by the light reflecting member 321. In this embodiment, a heat-emitting type light emitting element 329 may be used.

(Thirty-eighth Embodiment) FIG. 62 is a thirty-eighth embodiment of the present invention, and is a sectional view of a light emitting light source 347 in which a light emitting element 313 is mounted on an optical module 348. In this embodiment, the edge of the through-hole 322 of the optical module 348 is chamfered obliquely to form the chamfered portion 349, so that the light is directly emitted without being totally reflected at the inner peripheral portion of the total reflection area 325. Can be prevented.
Therefore, generation of stray light in the inner peripheral portion of the total reflection region 325 can be prevented. Note that, also in this embodiment, a heat radiation type may be used as the light emitting element.

(Thirty-ninth Embodiment) FIG. 63 is a thirty-ninth embodiment of the present invention, and is a cross-sectional view of a light emitting light source 350 in which a shell type light emitting element 352 is mounted on an optical module 351. In this embodiment, the optical module 351
A concave positioning portion 353 is provided on the inner periphery of the through hole 322, and a convex positioning portion 354 is provided on the outer periphery of the rear end of the mold resin 319 of the light emitting element 352.

Therefore, the optical module 351 and the light emitting element 3
When assembling 52, it is possible to align the optical axes of the optical module 351 and the light emitting element 352 by fitting the positioning portions 353 and 354 together, and to make the insertion depth of the light emitting element 352 into the through hole 322 constant. it can. Therefore, the light emitting light source 350 can be easily assembled, and the assembly accuracy of the light emitting light source 350 can be improved.

(Fortieth Embodiment) FIG. 64 shows a fortieth embodiment of the present invention. In this light emitting source 355, LE
A ring-shaped optical module 327 is installed on a circuit board 356 on which a D chip 316 is mounted. Also in such a light emitting light source 355, light emitted from the LED chip 316 into the air in front is directly emitted forward, and
The light emitted from the chip 316 in the lateral direction enters the transparent resin 320 from the inner peripheral surface of the optical module 327, is totally reflected by the total reflection area 325, is reflected by the light reflection member 321 and is reflected from the total reflection area 325. It is emitted forward.

In this light emitting light source 355, the LED chip 3
Since the light 16 is not covered with the resin, when the light emitted laterally from the LED chip 316 enters the transparent resin 320 of the optical module 327 from the inner peripheral surface, the light beam is refracted by a relatively large angle β. Therefore, comparing the light beams emitted in the same direction, the LED chip 31
The light is more likely to spread out than when the resin 6 is sealed with a resin (such as the mold resin 319), and the light-emitting area of the light-emitting light source 355 can be increased to increase the size of the light source.

(Forty-first Embodiment) FIG. 65 is a forty-first embodiment of the present invention, and is a cross-sectional view of a light emitting light source 357 in which an optical module 358 is mounted on a bullet-shaped light emitting element 313. In the optical module 358 used for the light emitting light source 357, the front surface of the light emitting element 313 is covered by the transparent resin 320. Transparent resin 320
Of the front surface (resin interface) of the light emitting element 313 is a lens portion 359 having a convex curved surface, and the outer peripheral region of the lens portion 359 is a flat total reflection region 32.
It is 5. Further, a concave portion 360 having a shape in which the light emitting element 313 fits exactly on the back surface of the lens portion 359.
(Element mounting position).

According to the light emitting source 357,
The light emitted forward from the LED chip 316 enters the transparent resin 320 of the optical module 358, and is collected by receiving a lens action when emitted from the lens portion 359 of the optical module 358. Further, the light emitted from the LED chip in the lateral direction is transmitted to the total reflection area 325 of the optical module 358.
The light is totally reflected by the light reflection member 321 and is reflected by the light reflection member 321.
The light passes through 25 and is emitted forward. Therefore, the light emitted from the total reflection area 325 is also condensed by the optical reflection member 321 under the optical action. Therefore, light emitted from the LED chip 316 in any direction is condensed by receiving an optical effect, and the area of the light source 357 can be increased.

If the shape of the front surface of the light emitting element 313 and the shape of the concave portion 360 of the optical module 358 are both hemispherical, the light loss caused by covering the light emitting element 313 with the optical module 358 also decreases. There is only a loss at the time of entering the optical module 358, a Fresnel loss at the time of exiting from the optical module 358, and a slight anti-loss at the light reflecting member 321, and about 90% of the light emitted from the LED chip 316 is efficiently emitted. The light is emitted from the light source 357 to the outside.

When the light emitting element 313 is fitted in the concave portion 360 of the optical module 358 as described above, positioning when the light emitting element 313 is mounted on the optical module 358 can be easily performed. Further, since the positioning is easy, the optical module 358 can be easily removed from the light emitting element 313, and a plurality of types of optical modules having different directivity angles and light distribution characteristics are prepared, and can be replaced as necessary. it can.

FIGS. 66 (a), 66 (b) and 66 (c) are schematic process charts showing the steps of manufacturing the light emitting light source 357. Figure 66
As shown in (a), a molding die 361 is formed with a cavity 362 for molding the outer shape of the optical module 358 and a concave portion 363 for molding the lens portion 359. The light reflecting member 321 is placed upside down in the cavity 362, and the edge of the light reflecting member 321 is
Position with 2. Next, the light emitting element 313 is placed in the cavity 362 so as to be positioned in the central opening of the light reflecting member 321 and held in a hollow state. In this state,
As shown in FIG. 66B, the transparent resin 320 is injected into the cavity 362 and cured, and the optical module 358 is formed integrally with the light emitting element 313. After this, FIG.
When it is taken out from the cavity 362 of the molding die 361 as in (c), the light emitting light source 357 is obtained.

When the light source 357 is manufactured in this manner, an air layer is not interposed between the light emitting element 313 and the optical module 358. Therefore, the air layer is interposed between the light emitting element 313 and the optical module 358. Light is less likely to be reflected, and the light emitting element 313 and the optical module 358
And the optical coupling efficiency becomes good. Further, by manufacturing in this manner, the manufacturing process of the optical module 358 and the assembly process of the optical module 358 and the light emitting element 313 are performed at one time, so that the manufacturing process is streamlined. As a result, the manufacturing cost as a whole can be reduced, and the accuracy of the positional relationship between the light emitting element 313 and the optical module 358 can be easily obtained.

Further, such a structure in which the front surface of the light emitting element is covered with the lens portion 359 can also be realized by using a heat radiation type light emitting element 329 as shown in FIG.

(Forty-second Embodiment) FIG. 68 shows a forty-second embodiment of the present invention. The optical module 365 used for the light source 364 is different from the optical module 358 shown in FIG. 65 in that the front surface of the transparent resin 320 of the optical module 365 is flat and the light emitting element 31
3 is also a flat surface 366 flush with the total reflection area 325.

According to such an embodiment, since the front surface of the optical module 365 does not protrude, the light emitting source 364 is provided.
Can be made smaller. In addition, foreign matter such as dust is not attached to the optical module 365 by being caught by the protruding portion (lens portion 359) on the front surface.

Note that such a structure can also be used for a heat radiation type light emitting element or LED chip.

(Forty-third Embodiment) FIG. 69 shows a forty-third embodiment of the present invention, in which an LED chip 316 mounted on a circuit board 356 using the same optical module 358 as shown in FIG. Is a light emitting light source 367 that is covered by an optical module 358. The light emitting light source 367 has the same structure as the light emitting light source 355 (FIG. 64) according to the fortieth embodiment. However, in the light emitting light source 367, the LED chip 316 is housed in the concave portion 360 of the optical module 358 to emit light. The module 358 covers the LED chip 316,
The durability of the LED chip 316 is increased, and the LED chip 316 is more resistant to water drops and the like. Further, in the light emitting light source 367, the light emitted forward from the LED chip 316 can be collected by the lens unit 359. Further, since the concave portion 360 has a hemispherical surface centered on the light emitting point of the LED chip 316, light emitted from the LED chip 316 is hardly reflected at the interface of the concave portion 360, and light loss is reduced. ing.

The light emitting light source 368 shown in FIG. 70 is a modification of the light emitting light source 367. The light emitting light source 368 has a recess 369 formed at the center of the front surface of the optical module 358 so as not to protrude from the front surface of the optical module 358. Inside lens part 3
59 are provided. Therefore, according to the light emitting light source 368, there is no protrusion on the front surface of the optical module 358, and the light emitting light source 368 can be made thin.

The light-emitting light source 370 shown in FIG. 71 is also a modification of the light-emitting light source 367, and the concave portion 360 for receiving the LED chip 316 is formed in a rectangular parallelepiped shape according to the shape of the LED chip 316. Therefore, the concave portion 360 is
By mounting the optical module 358 along with the chip 316, the optical module 358 can be easily positioned.

FIG. 72 is a sectional view showing a light emitting light source 373 according to a forty-fourth embodiment of the present invention. In the optical module 374 used for the light emitting light source 373, the light reflecting member 321 is not embedded in the transparent resin 320, and the transparent resin 320 is provided only on the front surface of the light reflecting member 321. Therefore, the back surface of the metal light reflecting member 321 is exposed. Since the rear surface of the light reflecting member 321 is in direct contact with the outside air, the heat generated when the light source 373 emits light is easily radiated to the outside. Therefore, the temperature rise of the LED chip 316 can be suppressed small, and more current can flow through the LED chip 316 to increase the emission intensity of the emission light source 373.

The optical module 374 is connected to the circuit board 35.
6, a leg 375 is provided on the back surface of the light reflecting member 321.

According to such a light emitting light source 373, a high mount stop lamp of an automobile for which brightness is required,
It can be used for road traffic signals and the like, and these devices can be configured with a smaller number of light emitting light sources.

FIG. 73 is a sectional view showing a photodetector 376 according to a forty-fifth embodiment of the present invention. In the light receiver 376, the optical module 35 is mounted on the circuit board 356 so as to cover the light receiving element 377 such as a photodiode mounted on the circuit board 356.
8 are arranged. FIG. 73 shows the light emitting light source 36 of FIG.
Although the same optical module 358 as used in 7 is used, a different form of optical module may be used.

In the light receiver 376, the lens unit 3
The light that has entered 59 is directly collected on the light receiving element 377 by the lens unit 359. On the other hand, light incident on the resin interface (total reflection area 325) outside the lens portion 359 is transmitted through the total reflection area 325 and reflected by the light reflecting member 321. Next, the light reflected by the light reflecting member 321 and reaching the total reflection area 325 again is collected by the light receiving element 377 by being totally reflected by the total reflection area 325.

Therefore, according to such a combination of the optical module 358 and the light receiving element 377, since the optical module 358 functions as a large lens, a large light receiving area can be realized. Further, even if the light receiving area is increased by enlarging the optical module 358, a thin light receiver 376 can be realized without being large in size as in a light receiver using a lens.

(46th Embodiment) FIG. 74 is a sectional view showing a photodetector 378 according to a 46th embodiment of the present invention. The optical module 3 used in the light receiver 378
In 79, the base (outer periphery) of the lens portion 359
An annular cut 380 is formed so as to be inclined at an angle of γ with respect to the optical axis direction. Here, the angle γ is a critical angle of total reflection in the total reflection region 325 of light traveling from the transparent resin 320 toward the total reflection region 325.

By providing such cuts 380, it is possible to enlarge the lens portion 359 while maximizing the area for totally reflecting the light reflected by the light reflecting member 321, and to increase the amount of light received by the light receiving element 377. And the light collection efficiency can be increased. Also, the lens unit 3
Since the distance between the light receiving element 59 and the light receiving element 377 can be increased, the degree of freedom in designing the light receiving device 378 increases.

The optical module 37 having such a structure is described below.
9 can also be used as a light emitting light source.

(47th Embodiment) FIG. 75 is a sectional view showing a light emitting source 381 according to a 47th embodiment of the present invention. This embodiment is a combination of a flat package type light emitting element 382 and an optical module 383. The light emitting element 382 of the flat package type has a mold resin 319 formed in a panel shape with a flat front surface (the surface in the direction of light emission from the LED chip 316). Further, the optical module 383 has the same structure as the optical module 358 used in the light emitting light source 367 in FIG. 69, but differs in that it does not have the concave portion 360. The optical module 383 is mounted on the light emitting element 382 by adhering the back surface to the front surface of the mold resin 319 of the light emitting element 382 and bonding with a transparent adhesive or the like. This light source 3
Even at 81, the light emitted from the LED chip 316 exhibits the same behavior as that described above.

If such a flat light-emitting light source 381 is used for an optical sensor or the like, the detection distance can be increased and the detection accuracy can be increased as compared with the conventional optical sensor, so that the optical path distance can be shortened. And the size of the optical sensor can be reduced. Further, if the light emitting light source 381 is used for positioning when assembling the optical sensor, it is possible to reduce optical axis variation of the optical sensor.

A light emitting light source 384 shown in FIG. 76 is a modification of this embodiment, and is an optical module 385 mounted on the front surface of a light emitting element 382 of a flat package type.
Is such that the lens portion 359 does not protrude by locking the recess 369 around the lens portion 359,
The light emitting light source 384 can be made thinner.

A light emitting light source 386 shown in FIG. 77 is another modified example.
A conical depression 388 is formed at the center of the front surface of the optical module 387 mounted on the front surface of the optical module 2. Since the depression 388 coincides with the optical axis of the LED chip 316, the light emitted forward from the LED chip 316 can be totally reflected, and the amount of light emitted straight forward from the LED chip 316 can be reduced. be able to.

A light emitting light source 389 shown in FIG. 78 is still another modification, and a shallow spherical recess 391 is formed in the center of the front surface of the optical module 390. Also in this light emitting light source 389, the light amount distribution of the light emitted from the front surface of the optical module 390 can be controlled by the depression 391.

The light source 392 shown in FIG. 79 is still another modification, and the entire front surface of the optical module 390 is formed flat.

(48th Embodiment) FIG. 80 is a sectional view showing a light emitting light source 393 according to a 48th embodiment of the present invention. In this light emitting light source 393, a guide portion 395 having a hook-shaped cross section is provided on the back surface of the optical module 394, and the flat package type light emitting element 38 is provided by the guide portion 395.
The second mold resin 319 is gripped.

If the two sides of the mold resin 319 are grasped by the guide portion 395, the optical module 3
The guide section 39 is slid by sliding the 94 from the side.
5 can be engaged with the mold resin 319 of the light emitting element 382.

Alternatively, when the optical module 394 is integrally formed with the light emitting element 382, the guide portion 395 may be used to hold four sides of the mold resin 319.

(49th Embodiment) FIG. 81 is a view for explaining a method for simultaneously producing a plurality of light emitting light sources.
The light emitting element 392 shown in FIG.
This shows a state before disconnection from the device 91. Leads 314 and 31 are formed on the lead frame 391 by punching.
7 and a large number of stems are provided.
The LED chip is mounted in a state of being connected by 1,
Further, the light emitting element 3 is molded with a molding resin 319.
92 are produced. To obtain the light emitting element 392 here,
Each light emitting element 392 is separated from the lead frame 391. However, in this embodiment, the optical module 393 is attached to each light emitting element 392 in a state where each light emitting element 392 is connected by the lead frame 391.

In the state where the light emitting elements 392 are connected by the lead frame 391, the intervals between the light emitting elements 392 are uniform, so that the plurality of optical modules 39
3 can be mounted on each light emitting element 392 at a time.
Therefore, the light emitting element 392 and the optical module 393 can be assembled on the basis of a highly accurate lead frame with little variation during production, and the light emitting light source can be assembled accurately and efficiently. On the other hand, lead frame 39
If it is fixed at 1, the distance between the light-emitting elements 392 is limited, and it may not be possible to provide a sufficient space between the light-emitting elements 392. In such a case, FIG. Thus, the edge of the optical module 393 may be cut off to form an ellipse, and the minor axis direction of the optical module 393 may be aligned with the arrangement direction of the light emitting elements 392. Thus, the area of the optical module 393 can be increased without being limited by the interval between the light emitting elements 392, and a light emitting light source having a large area can be obtained.

(50th Embodiment) FIGS. 82 and 83 show a light emitting source array 400 according to a 50th embodiment of the present invention.
It is a perspective view and a sectional view of FIG. This is because a plurality of LED chips 3 are mounted on a circuit board 356 arranged on the pedestal 401.
16 are arranged at regular intervals, and the optical module array 403 is superposed thereon. Optical module array 40
3 is provided with a lens portion 359 and a light reflecting member 321 at the same pitch as the LED chip 316. Therefore,
In the light-emitting light source array 400, individual light-emitting light sources 402 are arranged in an array at a fixed pitch so that each light-emitting light source 402 can be individually illuminated.

FIG. 84 shows a modification of the light-emitting light source array, in which a light-emitting element 405 of a cannonball type is used. In the light emitting light source array 404, light emitting elements 405 are mounted on the circuit board 406 at regular intervals, and an optical module array 407 having an opening at a position corresponding to each light emitting element 405 is overlaid on the circuit board 406. ing. The optical module array 407 is provided with a light reflection member 321 so as to surround each opening.

In these light emitting light source arrays 404, 404, the individual light emitting light sources arranged in a plane can emit light, so that they can be used as a light emitting display device or the like.

In order to produce a light emitting light source array, individual light emitting light sources may be arranged on a circuit board. At that time, each light source 408 may be circular and arranged in a honeycomb shape as shown in FIG. 85, or each light source 408 may be hexagonal and arranged in a honeycomb shape as shown in FIG.
Alternatively, each 408 may be arranged in a rectangular shape and arranged as shown in FIG.

Also, the light emitting sources 408 formed in an oval shape as shown in FIG. 88 may be arranged along the long axis direction. Such a one-dimensional light-emitting light source array can be used for a high-mount stop lamp for vehicles and the like.

(51st Embodiment) FIG. 89 is a sectional view showing the structure of a light emitting light source 91 according to a 33rd embodiment.
In this light emitting light source 91, one of the lead frames 1
The stem 15 is provided with a stem 15 at the tip thereof. The light emitting element 12 such as an LED chip is die-bonded to the stem 15, and the other lead frame 14 and the light emitting element 12 are bonded by bonding wires 16. The light reflecting portion 20 is formed in an aspherical shape by a metal plate,
The inner surface of the metal plate is mirror-finished by metal plating or etching, and an opening 20a is opened substantially at the center.

The leading ends of the lead frames 17 and 14 on which the light emitting elements 12 are mounted are inserted into the openings 20a of the light reflecting section 20, and together with the light reflecting section 20, the molding resin 13 made of a high-refractive-index translucent resin is used. Sealed inside. A total reflection area 19 is formed on the front surface of the mold resin 13, and a convex lens-shaped direct emission area 18 is formed substantially at the center thereof.

When the light-emitting light source 91 is turned on, the light that has entered the direct emission area 18 out of the light emitted from the light-emitting element 12 is collected by the direct emission area 18 and emitted forward. In addition, of the light emitted from the light emitting element 12, the light that has directly entered the total reflection area 19 around the emission area 18 is totally reflected rearward in the total reflection area 19, and the light located behind the total reflection area 19. After being reflected again by the reflection unit 20 and narrowed down so that the directional characteristics are narrowed (preferably, substantially parallel light), the light is transmitted through the total reflection area 19 and emitted forward. Therefore, the light emitting element 1
Light emitted in a direction having a large angle with respect to the optical axis direction can also be emitted forward, and the light use efficiency is greatly improved. Further, light can be uniformly emitted on the front surface of the light emitting element 12.

In the light emitting light source 91, the front surface (total reflection area 19) of the mold resin 13 is
2 with respect to a plane E perpendicular to the optical axis. The direct emission area 18 is formed of an aspherical lens, and the optical axis (center) F of the direct emission area 18 is inclined relative to the geometric center G of the total reflection area 19 in the direction of inclination of the total reflection area 19 (see FIG. 89 upward). The optical axis of the light emitting element 12 is smaller than the optical axis F of the direct emission area 18 by the total reflection area 1.
9 further deviates in the inclination direction.

The curved shape of the light reflecting portion 20 is expressed by one aspherical surface.
Has an asymmetric shape as if it had been created using a portion off center. The shape of the light reflecting portion 20 will be described in detail with reference to FIG. In FIGS. 90 (a) and 90 (b), the curved surface plate 92 indicated by a two-dot chain line has a curved surface represented by an aspherical expression with H as the axis of rotational symmetry. The light reflecting portion 20 is cut by a surface in which the edge of the curved plate 92 is inclined by φ in the J direction. The opening 20 a of the light reflecting portion 20 is formed in a substantially circular shape, and the center K is located between the rotation symmetry axis H of the curved plate 92 and the center G of the light reflecting portion 20. Further, the center K of the opening 20a substantially coincides with the optical axis of the direct emission area 18. Further, both side edges 93 of the light reflecting portion 20 are slightly cut off, and accordingly, the shape of the light emitting light source 91 as viewed from the front is also a bale shape with both side surfaces cut off. This is because the shape of the light reflecting portion 20 is not rotationally symmetric but has directionality, so that the light reflecting portion 20 is prevented from rotating and displacing in the mold during molding.

Note that the shape of the light emitting light source 91 when viewed from the front is not limited to the bale shape as shown in FIG.
, A square as shown in FIG. 109, an ellipse as shown in FIG. 110, and the like.

The optical axis of the light emitting element 12 is also deviated from the center G of the light reflecting section 20 and is shifted in the direction of inclination of the total reflection area 19.

Since the total reflection area 19 and the light reflection section 20 are inclined as described above, the light source 91 shown in FIG.
As shown in the figure, by setting the total reflection area 19 so as to face obliquely upward, even if disturbance light such as west sun or sunrise enters obliquely from above, it is reflected by the total reflection area 19 or the light reflection unit 20. The returned light goes back diagonally upward and does not reach the ground. Therefore, it is possible to avoid the inconvenience that the light source 91 appears to be turned on by the reflected light even when the light source 91 is turned off.

Further, since the light emitting element 12 is shifted upward from the optical axis F of the direct emission area 18 as described above, the light exiting from the light emitting element 12 and passing through the direct emission area 18 is not reflected by the total reflection area 19. And a region different from the reflected light in the light reflecting portion 20, that is, downward. Further, the light reflecting portion 20 is formed in an asymmetric shape, and the light emitting element 12 is
Of the light emitting element 12
After the light is totally reflected by the total reflection area 19 and reflected by the light reflection section 20, the light emitted through the total reflection area 19 is also different from the light reflected by the total reflection area 19 and the light reflection section 20. That is, the light is emitted downward. Therefore,
The light of the light emitting light source 91 can be reliably captured from the ground without being disturbed by disturbance light, and it can be clearly determined whether the light emitting light source 91 is on or off.

FIG. 92 is a diagram showing an example of light distribution characteristics of light emitted from the light emitting light source 91. In FIG. This light distribution characteristic has a slope of ε downward with respect to the optical axis of the light emitting element 12 or the central axis of the light emitting light source 91, and is narrow in the inclination direction (upward) of the total reflection area 19. On the other side (downward), the light has asymmetric alignment characteristics distributed over a wide range.

Due to such light distribution characteristics, when the light-emitting light source 91 is used for a traffic light, it looks bright when viewed from a distance, and is invisible when viewed from close-up. It will be possible to realize how to illuminate.

Further, in the light emitting light source 91, the design of the light emitting light source 91 is facilitated by making the direct emission area 18 an aspherical lens or expressing the light reflecting portion 20 by an aspherical expression.

As shown in FIG. 89, the outer peripheral edge of the light reflecting portion 20 is located at a chamfered portion 25 formed on the outer peripheral portion of the front surface of the mold resin 13. When molding the molding resin 13, the light reflecting portion 20 can be positioned by bringing the outer peripheral edge of the light reflecting portion 20 into contact with the inner surface of the cavity of the molding die. Since it flows through 20a, the light reflection part 20 can be easily insert-molded.

The direct emission area 18 is not limited to an aspherical lens, but may be a spherical lens.

(52nd Embodiment) FIGS. 93 and 94
FIG. 35 shows the thirty-fourth embodiment, and is a front view and a side view of a traffic light 101 using the light emitting light source 91 having the above-described structure. This traffic light 101 is red,
The yellow and green signal lights 102R, 102Y, and 102G are arranged, and the upper part is covered with a hood 103.
Red, yellow, green signal lights 102R, 102Y, 102G
Is a light emission source 9 of the corresponding emission color, as shown in FIG.
1 are mounted on a board 104 in the same direction, the board 104 is housed in a casing 105, and the front surface is covered with a milky or translucent cover 106.

FIG. 97 is a cross-sectional view for comparison showing the structure of a signal light using the conventional LED 107. In FIG. Conventional LE
In D107, since light is emitted straight forward, if the substrate 104 on which such an LED 107 is mounted is housed inside a signal lamp and light is emitted downward, FIG.
It is necessary to put the substrate 104 in the casing 105 at an angle as shown in FIG. Therefore, the casing 10 of the signal lamp
The structure for mounting the substrate 104 in the device 5 becomes complicated.
Further, since the substrate 104 must be accommodated obliquely, the thickness of the signal lamp is increased.

On the other hand, the traffic light 101 according to the present invention
96, the light source 91 itself can emit light obliquely downward as shown in FIG. 96, so that the substrate 104 can be accommodated in parallel with the casing 105 as shown in FIG. , 102G can be reduced in thickness. Further, the signal light 10
The structure for mounting in the 2R, 102Y, and 102G is also simplified. Furthermore, it is possible to efficiently distribute outgoing light within an irradiation standard range of a traffic signal that is determined not to need to illuminate upward, thereby realizing the traffic signal 101 using the light emission light source 91 with high luminous efficiency. Can be. Further, since the light reflected by the light emitting light source 91 is not reflected downward, the visibility of the signal lights 102R, 102Y, and 102G is improved.

It should be noted that, like the lamp of the traffic light 101,
In order to emit light in a non-white color such as green or blue, a method using a light emitting light source in which a light emitting element 12 such as a red light LED, a green light LED, a blue light LED or the like is sealed in a transparent mold resin 13 is used. Light emitting element 1 that emits white light such as an LED
It is conceivable to use a light emitting light source in which the light emitting light source 2 is sealed in a mold resin 13 made of a red transparent resin, a green transparent resin, a blue transparent resin, or the like. However, according to the former method, even when disturbance light such as sunlight is reflected toward the ground by the surface of the mold resin 13 or the light reflecting portion 20, the light source emits the reflected light. It is unlikely that the light-emitting light source is turned off due to the reflected light even though the light-emitting light source is turned off.

(53rd Embodiment) FIG. 98 is a front view showing an example of a light emitting display 111 installed on a support 116 according to a 35th embodiment. For example, road conditions and weather information are transmitted to a driver. The characters and illustrations are constituted by the light emitting light source 91. FIGS. 99 and 100 are a front view and a side view of a light emitting display unit 112 constituting the light emitting display 111. FIG. Light emitting display unit 10
2 mounts the light emitting light source 91 described in the thirty-third embodiment on a substrate 113, and mounts the substrate 113 on the base 1
14 and the cover 115, and each light emitting light source 91
Is exposed from the hole of the cover 115. The light-emitting light source 91 has an appropriate light-emitting color according to a mark or a character to be displayed in an appropriate pattern.
3 is arranged.

In the case of a light emitting display unit using the conventional LED 117, as shown in FIG.
Since the light from D117 is emitted straight forward, if the light-emitting display unit is to be installed on a wall or a support so as to be easily viewed from below, the light-emitting display unit must be installed inclined downward.

On the other hand, the luminous light source 91 according to the present invention
100, the light emitting light source 91 itself can emit light in an oblique direction as shown in FIG. 100, so that the light can be emitted obliquely downward without installing the light emitting display at an angle. It is easy to see from the ground. Therefore, the light-emitting display 111 can be easily installed, and the light-emitting display 111 can be made thin and slim. Moreover, since the light-emitting display is less likely to be invisible due to the reflection of disturbance light such as west sun and sunrise, according to the light-emitting display 111 using the light-emitting light source 91 of the present invention, using the light-emitting light source 91 having high luminous efficiency, Moreover, it is possible to realize the light emitting display 111 capable of clearly recognizing the display.

(Fifty-fourth Embodiment) FIG. 102 is a sectional view showing the structure of a light emitting source 121 according to a thirty-sixth embodiment. In this light emitting light source 121, the total reflection area 19 on the front surface of the mold resin 13 that seals the lead frame 17 having the light emitting element 12 die-bonded to the tip and the lead frame 14 wire bonded to the light emitting element 12 is used as the light emitting element. 12 are formed on a plane perpendicular to the optical axis. The light emitting light source 121 is installed obliquely with the total reflection area 19 of the mold resin 13 facing the direction of disturbance light.

Thus, even with the light source 121, even if disturbance light from a low altitude, for example, west sun or sunrise enters the light source 121, the light reflected by the total reflection area 19 of the light source 121 remains in the original direction ( Since the light is reflected obliquely upward, the light does not reach the ground and does not appear to be lit even when the light emitting light source 121 is turned off.

On the other hand, if the directional angle of the light emitted from the light emitting source 121 is widened, the light emitted downward can be clearly seen from below (from the ground), so that the visibility of the light emitting source 121 can be improved. There is no sacrifice. In order to make the light of the light emitting light source 121 easily visible from below, the light axis of the light emitting element 12 in the mold resin 13 is inclined downward, and the light emitted from the light emitting element 12 is transmitted to the total reflection area 19.
May be refracted and emitted downward.

As in the case of the light source 122 shown in FIG. 103, the emission region 18 may be provided directly at the center of the total reflection region 19 of the molding resin 13. Again, in this case,
The same effect as the light emitting light source 121 of FIG. 102 can be obtained.

The light emitting light source 134 shown in FIG.
2, a symmetrical light reflecting portion 20 is provided behind the total reflection region 19 in the light emitting source 121 having the structure as shown in FIG.
The light totally reflected by the total reflection area 19 is totally reflected by the light reflection section 20 and emitted forward. The light emitting source 135 shown in FIG. 119 has a direct emission area 18 provided at the center of the total reflection area 19 in the light emitting light source 134 shown in FIG. 118 (or a light having a symmetric shape in the light emitting light source 122 shown in FIG. 103). (Reflection portion 20 is provided).

(55th Embodiment) FIG. 104 is a sectional view showing the structure of a light emitting light source 123 according to a 37th embodiment. In the light emitting light source 123, the total reflection area 19 on the front surface of the mold resin 13 that seals the lead frame 17 having the light emitting element 12 die-bonded to the tip and the lead frame 14 wire bonded to the light emitting element 12 is formed by the light emitting element. Twelve optical axes are inclined. The light emitting light source 123 is installed substantially horizontally,
Is installed with the total reflection area 19 (inclined surface) facing obliquely upward. A part of the light emitted from the light emitting element 12 is refracted downward because the total reflection area 19 is inclined.
In order to emit more light obliquely downward, the optical axis of the light emitting element 12 may be inclined downward.

In the light emitting light source 123, even when disturbance light from a low altitude, for example, the west sun or the morning sun enters the light emitting light source 123, the light reflected by the total reflection area 19 of the light emitting light source 121 returns to the original direction ( Since the light is reflected obliquely upward, the light does not reach the ground and does not appear to be lit even when the light emitting light source 121 is turned off.

As in the case of the light emitting light source 124 shown in FIG. 105, the emission region 18 may be provided directly at the center of the total reflection region 19 of the molding resin 13. Again, in this case,
The same effect as the light emitting light source 123 of FIG. 104 can be obtained.

(56th Embodiment) FIG. 106 is a sectional view showing the structure of a light emitting light source 125 according to the 38th embodiment. In the light emitting light source 125, the lead frame 17 having the light emitting element 12 die-bonded to the tip, the lead frame 14 wire bonded to the light emitting element 12, and the entire front surface of the mold resin 13 that seals the light reflecting portion 20. The reflection area 19 is inclined. Accordingly, the outer peripheral edge of the light reflecting portion 20 is also cut obliquely, and the shape of the light reflecting portion 20 is vertically asymmetric. This embodiment includes the light emitting light source 91 described in the thirty-third embodiment except that the direct emission region 18 is excluded.

The light emitting light source 125 is installed substantially horizontally, and is installed with the total reflection area 19 (inclined surface) of the mold resin 13 obliquely upward. Light that has exited from the light emitting element 12 and has been totally reflected in the total reflection area 19 is reflected by the light reflection section 20 and then refracted in the total reflection area 19 and emitted downward. Part of the light emitted forward from the light emitting element 12 is refracted downward by the total reflection area 19. The light axis of the light emitting element 12 may be inclined downward.

Thus, in the light emitting light source 125, even if disturbance light from a low altitude, for example, the west sun or the morning sun enters the light emitting light source 125, the light reflected by the total reflection area 19 of the light emitting light source 125 returns to the original direction ( Since the light is reflected obliquely upward, the light does not reach the ground and does not appear to be lit even when the light source 125 is turned off.

In the light emitting light source 125, light emitted from the light emitting element 12 in the peripheral direction is also totally reflected by the total reflection area 19, further reflected by the light reflection section 20, and emitted downward from the total reflection area 19. Therefore, the light use efficiency increases.

(57th Embodiment) FIG. 111 is a sectional view showing the structure of a light emitting source 126 according to a 39th embodiment. In this embodiment, since the total reflection area 19 on the front surface of the mold resin 13 is perpendicular to the optical axis of the light emitting element 12, the light emitting light source 126 itself is installed at an angle, and enters from a low altitude such as West Sun or Asahi. The disturbance light is not reflected downward. On the other hand, the light reflecting portion 20 in the mold resin 13 has a surface expressed by an asymmetrical or different aspherical expression in the upper half and the lower half.
After being totally reflected by the light reflection unit 20, the light emitted from the total reflection area 19 is emitted downward.

Therefore, the light-emitting light source 126 having such a structure
However, when disturbing light such as west sun or sunrise shines on the light emitting light source 126 which is turned off, the disturbing light is reflected downward by the total reflection area 19 or the light reflecting portion 20 so that the light emitting light source 126 is turned on. Can be prevented.

Similarly, in the light emitting source 127 of the embodiment shown in FIG. 112, the direct emission area 18 has an asymmetrical profile in the upper half and the lower half, whereby the light emitted from the direct emission area 18 is directed downward. The light is emitted toward the camera.

(Fifty-eighth Embodiment) FIG.
FIG. 4 is a cross-sectional view of a light emitting light source 128 according to the embodiment. In the light emitting light source 128, the center of the direct emission area 18 is located at the center of the total reflection area 19. Even when the center of the direct emission area 18 is located at the center of the total reflection area 19 as in the light emitting light source 128 of this embodiment, the position of the light emitting element 12 is moved to an appropriate position (the center of the direct emission area 18). (Higher position), the light can be emitted obliquely downward from the direct emission area 18.

(59th Embodiment) FIG. 114 is a sectional view showing the structure of a light emitting source 129 according to a 41st embodiment. In the light emitting light source 129, the entire total reflection area 19 is formed by a curved surface. The total reflection area 19 is designed so that most of the light emitted from the light emitting element 12 is totally reflected, and most of the light emitted from the light emitting element 12 is totally reflected rearward in the total reflection area 19, Further, light reflection part 2
The light is reflected at 0 and emitted from the total reflection area 19. The shape of the light reflecting portion 20 or the position of the light emitting element 12 is designed so that the light emitted from the total reflection region 19 is emitted downward. The total reflection area 19 is inclined obliquely upward. That is, the total reflection area 19
Is inclined obliquely upward.

Therefore, in this light emitting light source 129,
Most of the disturbance light such as the west sun and the sun rising from a low altitude is reflected almost in the original direction, making it difficult to reach the lower part.
On the other hand, most of the light emitted from the light emitting element 12 is emitted downward from the total reflection area 19 through multiple reflections. Therefore, when used as a light-emitting light source for a traffic light or the like, there is less possibility that the light-emitting light source 129 is erroneously recognized as being turned on even though the light-emitting light source 129 is turned off. Further, in a light emitting display or the like, a clear image can be seen even if the display is not tilted.

In this embodiment, the molding resin 1
(3) Since the area of the total reflection region on the front surface is large, of the light emitted from the light emitting element 12 that emits light in the Lambert distribution, strong light near the optical axis of the light emitting element 12 is reflected by the total reflection area 19 and the light reflection unit 20. Then, the light can be emitted from the light source 129, so that a light source with high luminous efficiency can be obtained.

FIG. 115 shows the total reflection area 19 (or
Instead of tilting the tangent plane 130 obliquely upward, the entire light emitting light source 131 is arranged obliquely upward. Even with such a light emitting light source 131, the light emitted from the light emitting light source 131 can be emitted obliquely downward while preventing disturbance light from being reflected downward.

(Sixtieth Embodiment) FIG.
It is sectional drawing of the light emission light source 132 by embodiment. In the light emitting light source 132, the emission region 18 is provided directly in the substantially central portion of the front surface of the mold resin 13, and the conical total reflection region 19 is formed around the emission region 18. The tangent plane contacting the edge of the total reflection area 19 is inclined obliquely upward, and
Is ζ1 above the total reflection area 19 and ζ2 below the total reflection area 19.

Light Emitting Light Source 1 According to Embodiment shown in FIG.
Also at 32, since the total reflection area 19 is inclined obliquely upward, disturbance light such as west sun and sun rising from a low altitude is reflected in the original direction so as not to reach below (the ground). Further, light is emitted obliquely downward from the light emitting light source 132 depending on the position of the light emitting element 12 and the shape of the light reflecting portion 20. Therefore, even when the light emitting light source 132 is turned off, the light emitting light source 132
Is less likely to be mistaken for being lit.

The light-emitting light source 133 shown in FIG. 117 is arranged such that the entire light-emitting light source 133 is inclined obliquely upward instead of inclining the total reflection area 19 (or the tangent plane 130) obliquely upward. is there. Even with such a light-emitting light source 133, the light emitted from the light-emitting light source 133 can be emitted obliquely downward while preventing disturbance light from being reflected downward.

(61st Embodiment) FIG. 120 is a sectional view showing the structure of a light emitting light source 136 according to a 43rd embodiment. In this light emitting light source 136, a total reflection area 19 inclined from a plane perpendicular to the optical axis direction of the light emitting element 12 is provided.
A direct emission area 18 is provided substantially at the center thereof, and a symmetrical light reflection section 20 is provided at the rear thereof. Further, the light emitting element 12 is arranged at a position deviated from the center of the light reflecting section 20 and the direct emission area 18 so as to emit light obliquely downward.

(62nd Embodiment) FIG. 121 (a)
(B) is an outdoor display device 14 according to the forty-fourth embodiment.
1 is a front view and a side view showing 1. In this outdoor display device 141, a light emitting light source 142 of the present invention having a square external shape when viewed from the front is arranged in a matrix on a substrate 143. According to such an outdoor display device 141, since the light-emitting light sources 142 can be arranged without gaps, there is an advantage that there is no gap in the light-emitting surface of the display device, and there is no unevenness in lighting and looks beautiful.

The light emitting light source 142 has a substrate 143 at the front.
122, the outdoor display device 141 is installed at a slightly diagonally upward position as shown in FIG. 122 so as not to reflect disturbance light downward. Light emitting light source 1
Since the light is emitted obliquely downward from the display 42, even if the outdoor display device 141 is installed obliquely upward, the display can be clearly seen from below.

(Sixth Embodiment) FIG. 123 (a)
(B) and (c) are 45th embodiments and illustrate an example of a method for manufacturing a light-emitting light source. Here, a light emitting light source will be described, but a light receiver can be manufactured in the same manner. FIG. 123 shows a mold 1 for manufacturing a light emitting light source.
51, the mold 151 has a mold resin 13
And a cavity 152 for molding the
A pattern surface 153 for forming the total reflection region 19 and a pattern surface 154 for forming the direct emission region 18 are formed on the bottom surface of the cavity 152.

In manufacturing a light emitting light source, first, FIG.
As shown in FIG. 3, the light reflecting portion 20 is placed in the cavity 152. Since the outer diameter of the light reflecting portion 20 is substantially equal to the inner diameter of the cavity 152, the light reflecting portion 20 is
52 and the light reflecting portion 20
Can be positioned in the cavity 152.

In FIG. 123 (b), the lead frame 17
The light-emitting element 12 is die-bonded to the stem 15 of FIG. 1, and the lead frame 14 and the light-emitting element 12 are connected by a bonding wire 16. This is manufactured in a separate process in advance. This is housed in the cavity 152 with the light emitting element 12 down, as shown in FIG. 123 (b), and the upper ends of the lead frames 14 and 17 are supported so that the light emitting element 12 is positioned at a predetermined position in the cavity 152. Position.

In this state, as shown in FIG. 123 (c), the mold resin 13 is injected into the cavity 152 to insert the light emitting element 12 and the light reflecting section 20, and the direct emission area 18 and the total reflection area 19 are formed. After molding, and the mold resin 13 is cooled and hardened, it is taken out of the cavity 152 to obtain a light source.

According to such a manufacturing method, the light reflecting portion 2
The light emitting light source and the light receiving device can be mass-produced with simple equipment.

Next, several application examples of the light emitting light source according to the present invention, for example, the light emitting light sources according to the embodiments shown in FIGS. 3 to 21 will be described. (64th Embodiment) FIG. 124 shows a light-emitting display 161 according to a 46th embodiment, in which light-emitting sources 162 according to the present invention are arranged. To form such a light emitting display 161, FIG.
When a bullet-shaped light-emitting light source 163 as shown in (a) is used, the beam profile is bright near the center and dark near the periphery (see FIG. 4B), so that the visibility is not uniform. Was. Further, when such a bullet-shaped light emitting light source 163 is arranged, a gap is formed between the light emitting light sources 163 as shown in FIG.

On the other hand, the light emitting light source 162 of the present invention can be formed in a rectangular shape as shown in FIG. 126, so that the light emitting light sources 162 can be arranged without gaps as shown in FIG. No dark part is formed in the image, and the visibility is improved. Further, in the light emitting light source 162 of the present invention, a uniform beam profile as shown in FIG. 4A is obtained by combining the light from the lens-like direct emission area 18 and the light from the light reflecting section 20. Can be. Therefore, when an image or a character is drawn as a set of the light emitting light sources 162, the light emitting points are easily connected, and a smooth image or a character can be displayed.

Further, as shown in FIG. 127, a full-color light-emitting display can be obtained by delta-arranging light-emitting sources 162 each containing a red (R), green (G), and blue (B) light-emitting element. it can.

Although not shown, the luminescent light source 36 having two or more luminescent colors as shown in FIG.
Are arranged to form a multicolor light emitting display, a display with less color separation can be manufactured.

FIG. 128 shows a fifty-seventh embodiment of the present invention, which shows an optical fiber coupling device 164 using a light emitting source 162 according to the present invention. In this optical fiber coupling device 164, the lens 1 is placed between the light source 162 and the end face of the optical fiber 167.
65, and the light emitted from the light emitting light source 162 by the lens 165 is focused on the end face of the optical fiber 167.
The optical fiber 167 is coupled. The lens 165 used here has different lens constants at a portion corresponding to the direct emission region 18 of the light emitting light source 162 and a portion corresponding to the total reflection region 19, and has two types of convex lenses 166a,
66b. Then, the light emitted from the direct emission area 18 of the light source 162 is coupled to the end face of the optical fiber 167 at the center of the lens 165,
The light emitted from the total reflection area 19 is coupled to the end face of the optical fiber 167 at the periphery of the lens 165.

As described above, the light near the center radiated from the direct emission area 18 and the light near the periphery radiated from the total reflection area 19 can be efficiently focused on the end face of the optical fiber 167 by separate lens portions. Therefore, it is possible to realize an improvement in fiber coupling efficiency, which has been a problem in a system using a light emitting diode or the like.

(Sixty-Sixth Embodiment) FIG. 129 is a forty-eighth embodiment of the present invention, which is a signal light using a light emitting source 162 according to the present invention. FIG. 129 shows a red signal lamp formed by arranging red light sources 162 having a red emission color, a green signal lamp formed by arranging a green light source 162 having a green emission color, and a yellow light source 162 having a yellow emission color. It is a side view of the signal light 168 arrange | positioned and comprised the yellow signal lamp. here,
The signal light 168 is arranged obliquely upward so that the reflected light of the west sun by the signal light 168 does not face the vehicle position. Therefore, the difficulty of seeing the traffic light due to the reflection of West Sunshine, which is a problem in the traffic light, is improved.

As the light source 162, FIG.
A light source that emits light in an oblique direction, such as the light-emitting light sources 34 and 35 shown in FIG. 20, is used to emit light toward a diagonally lower road side. Therefore, the signal light 168 can be easily seen from the road while preventing a decrease in visibility due to the west sun. According to the traffic signal standard, upward light emission is not required. Therefore, by concentrating light downward, light use efficiency can be improved, and high luminance of the signal lamp can be realized.

It should be noted that a conventionally used shell-type light-emitting light source has a limit in obtaining an asymmetric beam profile because it is designed only by the lens shape. Therefore, if you turn the signal light upward to prevent the reflection of the West Sun, it will be invisible from the ground, but in the present invention, the mirror shape is asymmetric,
It can be easily realized by shifting the position of the light emitting element from the optical axis.

(Sixty-Sixth Embodiment) FIG. 130 is a forty-ninth embodiment showing an advertising signboard or the like using a light emitting source according to the present invention. As shown in FIG.
Advertising signboard (electric signboard) 170 installed on a wall or the like
In such a case, by directing the light emission direction downward, visibility from the ground is improved.Also, even in a horizontal plane, as shown in FIG. 131, the light of the advertising signboard is not emitted to the wall surface of the building. This can reduce unnecessary light and increase the brightness of the advertising signboard.

(68th Embodiment) FIG. 132 is a perspective view showing a high mount strap lamp 171 using a light emitting source 173 according to a 50th embodiment. The high mount strap lamp 171 is provided with a horizontally long substrate 174.
A light source 1 having a substantially elliptical shape as shown in FIG.
73 are mounted in a row.

The light emitting light source 173 for the high mount strap lamp has the same structure as the light emitting light source 24 shown in FIGS. 8 to 10, but has a substantially elliptical shape, an elliptical shape, a rectangular shape, etc. Because it has a long front side shape,
Both sides of the disc-shaped light reflecting portion 20 are bent and inserted into the mold resin 13. The light emitting light source 173 is mounted on the substrate 174 such that its major axis is parallel to the length of the substrate.

The high mount strap lamp 171
Is mounted inside the rear window 175 of the vehicle 172, and when the brake of the vehicle 172 is depressed, the all-light-emitting light sources 173 are turned on all at once to notify the following vehicles.

[0301] In such a high mount strap lamp 171, if a light source 173 that is long horizontally is used,
It is possible to efficiently emit horizontally long light. Further, since the number of necessary light-emitting light sources 173 can be reduced by making the light-emitting light sources 173 horizontally long, the cost of the high-mount strap lamp 171 can be reduced.

Next, several application examples of the light emitting light source having the major axis direction and the minor axis direction when viewed from the front, for example, the light emitting light source according to the embodiment shown in FIGS. 22 to 33 will be described. (69th Embodiment) FIG. 134 is a perspective view showing a high mount strap lamp 184 according to a 51st embodiment. The high-mount strap lamp 184 has the light-emitting sources according to the present invention arranged in a horizontal line and mounted on the inside of a rear window 188 of a vehicle 187, as shown in FIG.
When the brake of step 7 is depressed, it lights up.
The light-emitting light source constituting the high-mount strap lamp 184 may be the light-emitting light source as in each of the above-described embodiments. In particular, the light-emitting light source 67 as shown in FIG. 41 is desirable.

In a conventionally used high mount strap lamp 189, as shown in FIG. 137 (a), a plurality of light emitting diodes 190 are arranged in a horizontal row and emitted through a diffusion lens 191 provided on the front surface of the lamp. By doing so, a horizontally long light beam is realized. In such a high mount strap lamp 189, a single light emitting diode 190 can emit light only to the square area of FIG. 137 (b), so that a large number of light emitting diodes 190 are required.

On the other hand, in the high mount strap lamp 184 of the present invention, as shown in FIG.
For example, if a light-emitting light source 185 that emits a beam having a major axis length: a short axis length = 2: 1 is used, and a diffusion lens 186 corresponding to the beam profile of the light-emitting light source 185 is disposed in front of the light source 185, the light source shown in FIG. ), One light source 1
At 85, light can be emitted from twice the area of the light emitting diode 190 of the conventional example. Therefore, the light source 185
Can be set to 倍 of the arrangement pitch of the light emitting diodes 190 in the conventional example.

The light emitting light source 185 of the present invention can realize a light use efficiency twice or more as compared with the conventional light emitting diode 190.
Even if it is twice as large as 90, since the light power emitted by each light emitting light source 185 is twice, the high-mount strap lamp 1
The optical power emitted as 84 is the same as in the prior art. Therefore, according to the high-mount strap lamp 184 using the light-emitting light source 185 of the present invention, the number of light sources can be reduced by half, the number of components is reduced, the assembling is facilitated, and the cost can be significantly reduced.

(70th Embodiment) FIG. 138 shows a display device 20 using a light emitting source according to the 52nd embodiment.
FIG. In this display device 201, a large number of light-emitting light sources 202 are arranged in a matrix or a honeycomb shape, and each light-emitting light source 202 is arranged so that the long axis direction is horizontal. FIG.
Although a stand type is shown in FIG. 8, it may be a wall-mounted type or a type attached to the outer wall of a house.

[0307] In the case of a display device installed at about the level of the human eye, it is desired that the display device can be viewed from various angles in a horizontal direction as the directional angle of the display device. In this display device 201, the light-emitting light source 20 of the present invention is arranged so that the major axis direction is oriented in the horizontal direction.
As shown in FIG. 139, the light itself emitted from each light emitting light source 202 has a directional characteristic that spreads in the horizontal direction, and as a result, the display device 20
Even if it is 1, it has a laterally wide directional characteristic as shown in FIG. Therefore, it is possible to manufacture a display device having an excellent visual effect.

Next, some application examples using the photodetector according to the present invention will be described. (71st Embodiment) FIG. 141 shows a photoelectric sensor 211 for detecting the presence or absence of a diffuse reflection type object according to a 53rd embodiment.
FIG. 3 is a schematic diagram showing the configuration of FIG. This photoelectric sensor 211
A light emitting device 212 using a light emitting diode, a light emitting diode driving circuit 213, and a light receiving device according to the present invention (for example, FIG.
And an amplifying circuit 215 for amplifying the output from the light receiving device 214 and a light emitting diode driving circuit 213 to receive a light receiving signal from the amplifying circuit 215 to determine the presence or absence of an object. And a processing circuit 216 for performing such operations.

An object 217 that diffuses and reflects light exists in front of the photoelectric sensor 211,
When the light emitted from the light projector 212 of the light strikes the surface of the object 217, the light reflected by the surface of the object 217 as shown in FIG.
When the reflected light in the shaded area at 41 is received by the light receiver 214, the processing circuit 216 determines that there is an object, and outputs a detection signal.

In such a photoelectric sensor 211, the detection distance of an object is determined by the minimum amount of received light (S / N ratio) that can distinguish noise inside the sensor and light reflected from the object 217. If the intensity of the light emitted from the light projector 212 is the same, the intensity of the reflected light from the object 217 does not change, but by using the light receiver 214 of the present invention, the light receiving efficiency is improved and the amount of received light is increased. Therefore, there is a margin for detection. Therefore, by using such a photoelectric sensor 211, it is possible to detect a further distant object,
Since the amount of received light increases, the detection distance can be extended. For example, if the amount of received light is doubled, the detection distance becomes approximately √2
Extends twice.

In the conventional photoelectric sensor, in order to obtain such an effect, a large lens is disposed in front of the light receiver, and the reflected light in the hatched area in FIG. 141 is collected in a small light receiver. Needed. On the other hand, according to the photoelectric sensor 211 having the configuration of the present invention, since the photoelectric sensor 211 can be realized without mounting a lens or the like, the thickness of the light receiver 214, the size of the photoelectric sensor 211, the number of parts can be reduced, and the like. Variations in the light receiving system can be reduced, and the cost of the photoelectric sensor 211 can be reduced.

[0312] This photoelectric sensor is not limited to the reflection type, and the same effect can be obtained as a transmission type photoelectric sensor. Further, the present invention is not limited to the detection of the presence or absence of an object, and can also detect the distance (analog amount) to the object.

(72nd Embodiment) FIG. 142 is a sectional view showing a road stud 221 according to a 54th embodiment. Road studs are generally embedded in roads at the median strip or at intersections of roads, but conventional road studs only reflect headlights of automobiles.

A road stud 221 shown in FIG. 142 has a light emitting light source 222 according to the present invention and a light receiver 2 according to the present invention inside.
23, a charger 224 and a drive circuit 225, the surface of which is covered with a transparent cover 227. In this road stud 221, the light of the sun is received by the light receiver 223 during the day and the charger 224 is charged, and at night, the light source 222 is turned on by the drive circuit 225 using the power of the charger 224. It is designed to emit light.

According to such a road stud 221, the light receiving device 223 according to the present invention is used to efficiently charge the charger 22 during the day.
4 can be charged. Further, since the thickness of the light receiver 223 and the like can be reduced, the road stud 221 can also be reduced in thickness.
Embedding in the road 226 is facilitated.

In the above embodiment, a specific embodiment has been described with respect to road studs. However, the present invention is not limited to road studs, and uses electric energy stored in a charger by a daytime light receiver such as a delineator or a gaze guide light. It can be widely applied to self-luminous devices that turn on a light-emitting device at night.

(73rd Embodiment) Next, an illuminated switch will be described as an application example of a light emitting light source using an optical module. In the conventional illuminated switch 241, as shown in FIG. 146, a plurality of LEDs 24 are provided in a recess 244 provided in a light emitting unit 243 on the back side of a transparent or translucent cap 242 also serving as a closing switch.
5 is mounted thereon, and a diffusion plate 246 is disposed above the mounting plate 5.
Then, when the cap 242 is pressed and turned on, LE
D245 is turned on, and the cap 24 is actuated by the diffusion plate 246.
The whole 2 was shining. However, in such an illuminated switch 241, a plurality of LEDs 245 and the diffuser 24
6, the number of parts increased, the cost was increased, the power consumption was increased, and the size was increased.

FIG. 143 is a perspective view showing an illuminated switch 231 according to the fifty-fifth embodiment, FIG. 144 is an exploded perspective view thereof, and FIG. 145 is a schematic sectional view thereof. In this illuminated switch 231, one light emitting element 12 is mounted in a concave portion 233 provided on the upper surface of a light emitting unit 232, and the light module 72 as shown in FIG. 12 is covered. A transparent or translucent cap 234 (a cut pattern or the like may be formed on the back surface) is arranged on the concave portion 233, and the cap 234 is elastically moved upward by a spring (not shown). The cap 23 is urged and the cap 23 is
4 is held. Further, the light emitting unit 232
Is mounted on the upper surface of the switch body 236.

In such an illuminated switch 231, when the cap 234 also serving as a closing switch is pressed to be turned on, the light emitted from the light emitting element 12 emits light from the optical module 72.
The cap 2 spreads over the entire optical module 72
Then, the entire cap 234 is illuminated.

Accordingly, such an illuminated switch 231
Accordingly, the number of components can be reduced, the cost can be reduced, the power consumption during lighting can be reduced, and the size can be further reduced.

Although not shown, the above solar cell (FIG.
3), self-luminous devices such as road studs (FIG. 110), light-emitting light sources as shown in FIG. 6, and other general light-receiving elements and photoelectric conversion elements are shown in FIGS. 46 to 49 and FIGS. A combination with such an optical module can also be used.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a conventional light emitting light source.

FIG. 2 is a cross-sectional view illustrating another conventional light emitting light source.

FIG. 3 is a cross-sectional view illustrating a light emitting light source according to the first embodiment of the present invention.

4 is a diagram showing a light emission source of FIG. 3 and a light quantity distribution of light emitted by the light emission light source, and a light quantity distribution of light emitted by a conventional light emission light source.

FIG. 5 is a sectional view illustrating a light emitting source according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a light emitting source according to a third embodiment of the present invention.

FIG. 7 is a sectional view illustrating a light emitting source according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view illustrating a light emitting source according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view of the light emitting light source of FIG.

FIG. 10 is a sectional view of the light emitting light source of FIG.

FIG. 11 is an enlarged view showing a portion A of FIG. 8;

FIG. 12 is a sectional view illustrating a light emitting source according to a sixth embodiment of the present invention.

FIG. 13 is a sectional view illustrating a light emitting source according to a seventh embodiment of the present invention.

FIG. 14 is a sectional view showing a light emitting source according to an eighth embodiment of the present invention.

FIG. 15 is a cross-sectional view illustrating a light emitting source according to a ninth embodiment of the present invention.

FIG. 16 is a cross-sectional view illustrating a light emitting source according to a tenth embodiment of the present invention.

FIG. 17 is a sectional view illustrating a light emitting source according to an eleventh embodiment of the present invention.

FIG. 18 is a cross-sectional view illustrating a light emitting source according to a twelfth embodiment according to the present invention.

FIG. 19 is a sectional view showing a light emitting source according to a thirteenth embodiment of the present invention.

FIG. 20 is a sectional view showing a light emitting source according to a fourteenth embodiment of the present invention.

FIG. 21 is a sectional view showing a light emitting source according to a fifteenth embodiment according to the present invention.

FIG. 22 is a diagram showing color separation of a conventional two-chip light emitting light source.

FIG. 23 is a sectional view showing a light emitting source according to a sixteenth embodiment of the present invention.

FIG. 24 is a cross-sectional view illustrating a light emitting source according to a seventeenth embodiment of the present invention.

25 (a) and (b) are a front view and a partially cutaway side view showing, on an enlarged scale, a lead frame used for the light emitting source of FIG. 24.

26 is a cross-sectional view showing a behavior of light by enlarging a part of FIG. 24;

FIG. 27 is a sectional view showing an embodiment for comparison with the embodiment of FIG. 24;

FIG. 28 is a diagram showing the behavior of light in the embodiment of FIG. 27.

FIG. 29 is a sectional view showing a light emitting source according to an eighteenth embodiment of the present invention.

FIG. 30 is a perspective view of a light receiver according to a nineteenth embodiment of the present invention.

FIG. 31 is a sectional view of the light receiver shown in FIG. 30;

FIG. 32 is a sectional view of a light receiver according to a twentieth embodiment of the present invention.

FIG. 33 is a perspective view of a light receiver according to a twenty-first embodiment of the present invention.

FIG. 34 is a perspective view of a light emitting source according to a twenty-second embodiment of the present invention.

35 (a) is a front view of the light emitting light source of FIG. 34, (b)
Is a cross-sectional view taken along the line X1-X1 of FIG.
FIG. 4 is a sectional view taken along line -Y1.

36 is a diagram showing a profile of a light beam emitted from the light emitting source of FIG. 34.

FIG. 37 is a diagram showing an intensity distribution of light emitted from the light emitting light source of FIG. 34.

38A is a perspective view of a light reflecting portion formed to have a biconic surface, and FIG. 38B is a diagram illustrating a relationship between the biconic surface and coordinates.

FIG. 39 (a) is a front view of a light emitting light source according to a twenty-third embodiment according to the present invention, (b) is a cross-sectional view taken along line X2-X2 of (a), and (c) is Y2-Y2 of (a). It is a line sectional view.

40 is a diagram showing a profile of a light beam emitted from the light emitting source of FIG. 39.

41A is a front view of a light emitting source according to a twenty-fourth embodiment according to the present invention, FIG. 41B is a cross-sectional view taken along line X3-X3 of FIG. 41A, and FIG. 41C is a sectional view of Y3-Y3 of FIG. It is a line sectional view.

42 is a diagram showing a profile of a light beam emitted from the light emitting source of FIG. 41.

43 (a) is a front view of a light emitting light source according to a twenty-fifth embodiment according to the present invention, (b) is a cross-sectional view taken along line X4-X4 of (a), and (c) is Y4-Y4 of (a). It is a line sectional view.

44A is a front view showing a modification of the twenty-fifth embodiment, FIG. 44B is a sectional view taken along line X5-X5 in FIG. 44A, and FIG. 44C is a sectional view taken along line Y5-Y5 in FIG. It is.

FIG. 45 (a) is a view showing the behavior of the emitted light at the edge of the resin interface in the light source having no inclined surface, and FIG. 45 (b) is a diagram showing the emission at the edge of the resin interface in the light emitting source having the inclined surface. It is a figure showing behavior of emitted light.

FIGS. 46A and 46B are a front view and a sectional view of a light emitting source according to a twenty-sixth embodiment of the present invention.

FIG. 47 is a front view of a light emitting source according to a twenty-seventh embodiment according to the present invention.

FIG. 48 is a perspective view of a light receiver according to a twenty-eighth embodiment of the present invention.

FIG. 49 is a cross-sectional view of the light receiver of FIG. 48.

50 (a) and (b) are a front view and a perspective view showing an example of a light receiving element used in the light receiver of FIG. 48.

FIG. 51 is a sectional view of a light emitting source according to a twenty-ninth embodiment of the present invention.

FIG. 52 is a cross-sectional view of a light emitting source according to a thirtieth embodiment of the present invention.

FIG. 53 is a sectional view of a light emitting source according to a thirty-first embodiment of the present invention.

FIG. 54 is a partially enlarged view of FIG. 53.

FIG. 55 is a sectional view of a light emitting source according to a thirty-second embodiment of the present invention.

FIG. 56 is a partially enlarged view of FIG. 55;

FIG. 57 (a) is a sectional view of a light emitting light source according to a thirty-third embodiment according to the present invention, and FIG. 57 (b) is a front view of an optical module.

FIG. 58 is a sectional view of a light emitting source according to a thirty-fourth embodiment of the present invention.

FIG. 59 is a sectional view of a light emitting source according to a thirty-fifth embodiment of the present invention.

FIG. 60 is a sectional view of a light emitting source according to a thirty-sixth embodiment of the present invention.

FIG. 61 is a sectional view of a light emitting source according to a thirty-seventh embodiment of the present invention.

FIG. 62 is a sectional view of a light emitting source according to a thirty-eighth embodiment of the present invention.

FIG. 63 is a cross-sectional view of a light emitting source according to a thirty-ninth embodiment of the present invention.

FIG. 64 is a sectional view of a light emitting source according to a fortieth embodiment of the present invention.

FIG. 65 is a sectional view of a light emitting source according to a forty-first embodiment according to the present invention.

FIGS. 66 (a), (b), and (c) are views showing a method of manufacturing the light emitting light source of the above.

FIG. 67 is a sectional view showing a modification of the forty-first embodiment.

FIG. 68 is a sectional view of a light emitting light source according to a forty-second embodiment according to the present invention.

FIG. 69 is a sectional view of a light emitting source according to a forty-third embodiment of the present invention.

FIG. 70 is a sectional view showing a modification of the forty-third embodiment;

FIG. 71 is a sectional view showing a modification of the forty-third embodiment;

FIG. 72 is a sectional view of a light emitting source according to a forty-fourth embodiment of the present invention.

FIG. 73 is a sectional view of a light receiver according to a forty-fifth embodiment of the present invention.

FIG. 74 is a cross-sectional view of a light receiver according to a forty-sixth embodiment of the present invention.

FIG. 75 is a sectional view of a light emitting source according to a forty-seventh embodiment of the present invention.

FIG. 76 is a sectional view showing a modification of the forty-seventh embodiment.

FIG. 77 is a sectional view showing a modification of the 47th embodiment;

FIG. 78 is a sectional view showing a modification of the 47th embodiment;

FIG. 79 is a sectional view showing a modification of the 47th embodiment;

FIG. 80 is a sectional view of a light emitting source according to a forty-eighth embodiment of the present invention.

FIG. 81 (a) is a diagram for explaining a manufacturing step of a light emitting light source according to a forty-ninth embodiment according to the present invention, and FIG. 81 (b) is a bottom view thereof.

FIG. 82 is a perspective view of a light emitting light source array according to the fiftieth embodiment of the invention.

FIG. 83 is a cross-sectional view of the above light emitting light source array.

FIG. 84 is a cross-sectional view showing a modification of the fiftieth embodiment.

FIG. 85 is a diagram showing an arrangement of light emitting light sources in a light emitting light source array.

FIG. 86 is a diagram showing an arrangement of light emitting light sources in a light emitting light source array.

FIG. 87 is a diagram showing an arrangement of light emitting light sources in a light emitting light source array.

FIG. 88 is a diagram showing an arrangement of light emitting light sources in a light emitting light source array.

FIGS. 89 (a) and (b) are a cross-sectional view and a front view showing the structure of a light emitting source according to a fifty-first embodiment according to the present invention.

FIGS. 90 (a) and 90 (b) are a cross-sectional view and a front view for explaining the structure of a light reflecting member used in the light emitting source of FIG. 57.

FIG. 91 is an operation explanatory view of the light emitting light source of FIG. 57;

FIG. 92 is a diagram showing light distribution characteristics of the light emitting light source of FIG. 57.

FIG. 93 is a front view of a traffic signal according to a 52nd embodiment of the present invention.

FIG. 94 is a side view of the traffic light of FIG. 61.

FIG. 95 is a cross-sectional view of a signal light included in the traffic light of FIG. 61.

FIG. 96 is a diagram showing the direction of light emitted from the signal lamp of FIG. 61.

FIG. 97 is a cross-sectional view showing a comparative example of the signal light.

FIG. 98 is a front view of a light emitting display according to a 53rd embodiment according to the present invention.

FIG. 99 is a front view of a light emitting display unit included in the light emitting display of FIG. 66.

FIG. 100 is a side view of the light emitting display unit of FIG. 67.

FIG. 101 is a side view showing a comparative example of the light emitting display unit.

FIG. 102 is a sectional view of a light emitting source according to a fifty-fourth embodiment of the present invention.

FIG. 103 is a sectional view of a light emitting source according to a modification of the fifty-fourth embodiment.

FIG. 104 is a sectional view of a light emitting source according to a fifty-fifth embodiment according to the present invention;

FIG. 105 is a sectional view of a light emitting light source according to a modification of the fifty-fifth embodiment.

FIG. 106 is a sectional view of a light emitting source according to a 56th embodiment of the present invention.

FIG. 107 is a diagram showing a different front shape of the light emitting light source.

FIG. 108 is a diagram showing still another front shape of the light emitting light source.

FIG. 109 is a diagram showing still another front shape of the light emitting light source.

FIG. 110 is a diagram showing still another front shape of the light emitting light source.

FIG. 111 is a sectional view of a light emitting source according to a fifty-seventh embodiment of the present invention.

FIG. 112 is a sectional view of a light emitting source according to a modification of the fifty-seventh embodiment.

FIG. 113 is a sectional view of a light emitting source according to a fifty-eighth embodiment of the present invention;

FIG. 114 is a sectional view of a light emitting source according to a fifty-ninth embodiment of the present invention.

FIG. 115 is a sectional view of a light emitting light source according to a modification of the fifty-ninth embodiment.

FIG. 116 is a sectional view of a light emitting source according to a sixtieth embodiment of the present invention.

FIG. 117 is a sectional view of a light emitting source according to a modification of the sixtieth embodiment.

FIG. 118 is a sectional view of a light emitting source according to a modification of the fifty-fourth embodiment.

FIG. 119 is a sectional view of a light emitting source according to a modification of the fifty-fourth embodiment.

FIG. 120 is a sectional view of a light emitting source according to a sixty-first embodiment according to the present invention.

FIG. 121 is a front view and a side view of an outdoor display device according to a 62nd embodiment of the present invention.

FIG. 122 is a side view illustrating the usage state of the outdoor display device in FIG. 89.

FIG. 123 is a diagram illustrating the method for manufacturing the light emitting source according to the 63rd embodiment according to the present invention.

FIG. 124 is a perspective view showing a light emitting display according to a sixty-fourth embodiment of the present invention.

FIG. 125 (a) is a perspective view showing a conventional light-emitting light source used for a light-emitting display, and FIG. 125 (b) is a diagram showing a state where the light-emitting light sources are arranged.

126 is a perspective view showing an outer shape of a light emitting light source used for the light emitting display of FIG. 92.

FIG. 127 is a diagram showing one picture element of a full color light emitting display in which a red light emitting light source, a green light emitting light source, and a blue light emitting light source are arranged in a delta arrangement.

FIG. 128 is a schematic diagram showing an optical fiber coupling device according to a 65th embodiment of the present invention.

Fig. 129 is a schematic diagram showing a signal light according to a 66th embodiment of the present invention.

FIG. 130 is a schematic diagram showing an advertising signboard according to a 67th embodiment of the present invention;

FIG. 131 is a schematic diagram showing an advertising signboard according to a modification of the 67th embodiment;

FIG. 132 is a perspective view showing a high-mount strap lamp according to a sixty-eighth embodiment of the present invention.

FIG. 133 is a perspective view showing one light source constituting the high-mount strap lamp of FIG. 100;

FIG. 134 is a perspective view showing a high mount strap according to a 69th embodiment of the present invention.

FIG. 135 is a perspective view showing the high mount strap of FIG. 102 attached to a vehicle.

FIG. 136 (a) is a partially enlarged sectional view of the high mount strap of FIG. 102, and FIG. 136 (b) is a front view thereof.

FIG. 137 (a) is a partially enlarged sectional view of a conventional high mount strap, and FIG. 137 (b) is a front view thereof.

FIG. 138 is a perspective view showing a display device according to a seventy-ninth embodiment of the present invention.

FIG. 139 is a perspective view showing a beam shape of light emitted from a light emitting source used in the display device of FIG. 106.

140 is a perspective view showing a range in which the display of the display device of FIG. 106 can be recognized.

FIG. 141 is a sectional view showing the structure of the photoelectric sensor according to the seventy-first embodiment of the present invention;

FIG. 142 is a sectional view showing a structure of a road stud according to a 72nd embodiment of the present invention.

FIG. 143 is a perspective view showing an illuminated switch according to a 73rd embodiment of the present invention;

FIG. 144 is an exploded perspective view of the illuminated switch of FIG. 111.

FIG. 145 is a schematic sectional view of the illuminated switch of FIG. 111;

FIG. 146 is a schematic sectional view showing the structure of a conventional illuminated switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Emission light source 12 Light emitting element 13 Mold resin 14, 17 Lead frame 15 Stem 16 Bonding wire 18 Direct emission area 19 Total reflection area (resin interface) 19a Flat part 19b Tapered part 20 Light reflection part 20a Opening 51 Light receiving element 52 Light receiving element 53 Light reflection part 54 Mold resin 55, 58 Lead frame 56 Stem 57 Bonding wire 59 Direct incidence area 60 Plane area (resin interface) 72 Optical module 74 Element mounting part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) G09F 13/20 F21Y 101: 02 H01L 31/10 F21Q 1/00 N // F21W 101: 14 F21S 1/02 GF21Y 101: 02 H01L 31/10 A (31) Priority claim number Japanese Patent Application No. 2000-74976 (P2000-74976) (32) Priority date March 16, 2000 (2000.3.16) (33) Priority Claiming country Japan (JP) (31) Priority claim number Japanese Patent Application No. 2000-89859 (P2000-89859) (32) Priority date March 28, 2000 (2000. 3.28) (33) Priority claiming country Japan (JP) (31) Priority claim number Japanese Patent Application No. 2000-214261 (P2000-214261) (32) Priority date July 14, 2000 (July 14, 2000) (33) Priority claim country Japan (JP) (72) Inventor Naruto Yasuda Shimogyo-ku, Kyoto City, Kyoto Prefecture (72) Inventor Kenji Honma 801 Shidoji Horikawa Higashi-iri Minami Fudodoucho, Shimogyo-ku, Kyoto-shi, Kyoto OMRON Corporation (72) Inventor Yukari Terakawa 801 Fudodoucho OMRON Corporation F-term (reference) MA11 NA01 NB10 RA02 TA02 TA09 TA11 TA12

Claims (35)

[Claims] 1. An optical device comprising: an optical element; a resin interface for substantially totally reflecting light outside a predetermined region in front of the optical element; and a light reflecting member, wherein the optical device extends from the optical element to the outside of the optical device. The light path is
An optical device, wherein a positional relationship between the optical element, the resin interface, and the light reflecting member is determined so as to pass through a path that reflects at least once at each of the resin interface and the light reflecting member. . 2. A light emitting element, which is positioned such that light out of a predetermined area in front of light emitted from the light emitting element is totally reflected at a resin interface, is covered with a resin, and is emitted from the light emitting element. A light-emitting light source, characterized in that a light reflecting member for reflecting light almost totally reflected at the interface and emitting the light forward is provided behind the resin interface. 3. A region in contact with the predetermined region, wherein at least a part of the resin interface is inclined with respect to a plane perpendicular to an optical axis of the light emitting element.
The light source according to claim 2. 4. A region of the light reflecting member to which at least light totally reflected at the resin interface reaches is a concave mirror having a focal point around a mirror image position of the light emitting element with respect to the resin interface. The light-emitting light source according to claim 2, wherein 5. The light reflection element according to claim 2, wherein a distribution range of a curvature on a light reflection surface of the light reflection member is different in any two cross sections passing through an optical axis of the light emitting element and orthogonal to each other. A luminescent light source as described. 6. An optical lens is provided in a predetermined region in front of the light emitting element, and a distribution range of a curvature on a surface of the optical lens is different in any two cross sections passing through an optical axis of the light emitting element and orthogonal to each other. The light-emitting light source according to claim 5, characterized in that: 7. A light emitting source having a light emitting surface in front of a light emitting element, wherein the light emitting surface is inclined from a plane perpendicular to an optical axis direction of the light emitting element. 8. A light emitting source having a light emitting surface in front of a light emitting element, wherein the light emitting surface is installed so as to face upward from a horizontal direction, and at least a part of light emitted from the light emitting light. Wherein the light is emitted downward. 9. The light source according to claim 2, wherein the light reflected by the light reflecting member is emitted in a direction inclined with respect to an optical axis of the light emitting element. 10. A region of the light reflecting member to which at least light totally reflected at the resin interface reaches forms a concave mirror, and the light emitting element is located at a position deviated from a mirror image position of a focal point of the concave mirror with respect to the resin interface. 3. The light source according to claim 2, wherein the light source is arranged. 11. A second light reflecting member for reflecting light emitted from a side surface of the light emitting element in a forward direction, and most of the light reflected by the second light reflecting member is on the resin interface. The light-emitting light source according to claim 2, wherein an inclination angle of the second light reflecting member is set so as to reach. 12. The light source according to claim 11, wherein the second light reflecting member is provided on a lead frame for disposing the light emitting element. 13. The light source according to claim 2, wherein at least one portion of the light reflecting member is in contact with an outer peripheral portion of a resin constituting the resin interface. 14. A light-receiving device in which a light-receiving element is molded in a resin, wherein light incident on a region outside a predetermined region in front of the light-receiving element is reflected, and further, substantially totally reflected at a resin interface, to the light-receiving element. A light receiver, wherein a light reflecting member is provided behind an interface on the light receiving side of the resin so that the light is incident. 15. The photodetector according to claim 14, wherein at least a portion of the light reflecting member is in contact with an outer peripheral portion of a resin layer forming the resin interface. 16. An optical component for mounting an optically active element such as a light emitting element or a light receiving element at an element mounting position, wherein: a resin interface for substantially totally reflecting light outside a predetermined area in front of the element mounting position; A reflecting member, and an optical path from the element mounting position to the outside passes through the resin interface and a path reflecting at least once at each of the light reflecting members, so that the element mounting position and the resin An optical component that defines a positional relationship between an interface and the light reflecting member. 17. An optical component disposed on a front surface of a light source, comprising: a resin interface for substantially totally reflecting light emitted from the light source; and a light that is substantially totally reflected at the resin interface to be emitted forward. An optical component comprising: a light reflecting member. 18. An optical component disposed on the front surface of a light receiving element, wherein the light reflecting member reflects light incident from the outside, and the light reflected by the light reflecting member is totally reflected to be incident on the light receiving element. An optical component comprising a resin interface. 19. The semiconductor device according to claim 1, wherein a concave portion is provided on a surface opposite to the resin interface in order to arrange at least one of the light emitting element and the light receiving element.
19. The optical component according to 6, 17, or 18. 20. The device according to claim 16, further comprising a contact portion for determining a positional relationship with the optically active device at the device mounting position.
19. The optical component according to 17 or 18. 21. The device according to claim 16, wherein the element mounting position is a concave portion or a through hole.
9. The optical component according to 8. 22. A positioning device for determining a positional relationship with the optically active element.
An optical component according to item 1. 23. The optical component according to claim 16, wherein the external shape when viewed from the front has a major axis direction and a minor axis direction. 24. An optical component array, wherein a plurality of the optical components according to claim 16 are arranged. 25. An optical module according to claim 16 and an optical active element are arranged so as to have a predetermined space,
An optical device, wherein an optical module and an optically active element are engaged by filling the space with a light transmissive substance. 26. The optical component according to claim 16, wherein at least a portion of the light reflecting member is in contact with an outer peripheral portion of a resin layer forming the resin interface. 27. A resin layer having a resin interface for substantially totally reflecting light deviating from a predetermined region in front of the light emitting element, and a light reflecting member for emitting light substantially totally reflected at the resin interface to the front. A method of manufacturing an optical component, comprising: injecting resin while at least a part of an outer peripheral portion of the light reflecting member is in contact with an inner surface of a cavity of a molding die. Method. 28. A light reflecting member for reflecting light incident on a region outside a predetermined region in front of a light receiving element, and a resin layer having a resin interface for substantially totally reflecting the light reflected by the light reflecting member. A method of manufacturing an optical component, comprising: injecting a resin while at least a part of an outer peripheral portion of the light reflecting member is in contact with an inner surface of a cavity of a molding die. Method. 29. A light reflecting member which, out of light emitted from a light source, is substantially totally reflected at a resin interface, and light substantially totally reflected at the resin interface is provided behind the resin interface. A light emitting method for emitting light forward. 30. Light reflected outside the predetermined area in front of the light receiving element among the light incident from the outside is reflected by the light reflecting member, and the light reflected by the light reflecting member is almost totally reflected at the resin interface. A light incident method, wherein the light is incident on the light receiver. 31. The light receiving device according to claim 14, wherein a photoelectric conversion element is used as the light receiving element;
A photoelectric sensor, wherein the light receiver detects light emitted from the light emitting element or light emitted from the light emitting element and reflected by a target object. 32. A self-luminous device comprising: the light receiver according to claim 14, wherein a photoelectric conversion element is used as the light receiving element; a charger for storing electric energy generated by the light receiving element; and a light emitter. . 33. A display device comprising a plurality of the light emitting light sources according to claim 2 or a plurality of the optical components according to claim 17. 34. A light source for a vehicle-mounted lamp, wherein a plurality of the optical components according to claim 17 are arranged. 35. An outdoor display device comprising a plurality of the light-emitting light sources according to any one of claims 1, 4, 8 to 10, and a plurality of the optical components according to claim 17.