JP3228859B2 - Light emitting diode device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode device, and more particularly, to a light emitting diode device capable of relatively finely adjusting the optical axis angle of a light emitting diode when the light emitting diode is mounted on a cap member. About.

[0002]

2. Description of the Related Art Conventionally, optical information such as a relatively short distance, for example,
A light emitting diode device having one or a plurality of light emitting diodes is used when transmitting infrared information or when transmitting an optical signal such as an infrared signal for controlling various control devices.

In such a light-emitting diode device, there is an angle range in which an optical signal can be transmitted with the strength of a usable state (hereinafter referred to as an optical signal transmission range). It is set based on the light intensity emitted by one or a plurality of light emitting diodes used and the light radiation directivity. In order to relatively widen the optical signal transmission range of the light emitting diode device, a plurality of light emitting diodes are used, and when these light emitting diodes are arranged, the optical axis angles of the respective light emitting diodes are slightly different. Are arranged.

[0004] On the other hand, commercially available light-emitting diodes have inevitably various characteristics from the viewpoint of manufacturing, and among the characteristics, the position of the light-emitting diode at the optical axis position with respect to the position where the radiated light intensity is maximum is included. There is a so-called deviation of the optical axis deviation that causes a deviation.

FIG. 3 is a characteristic diagram showing the relationship between the light intensity and the directional angle of a known light-emitting diode device using one light-emitting diode. FIG.
FIG. 4 is a characteristic diagram illustrating a relationship between the light intensity and the directivity angle of a known light emitting diode device using light emitting diodes.

As shown in FIG. 3, in the case of a light emitting diode device using one light emitting diode, the relationship between the light intensity and the directivity angle of one light emitting diode is exclusively the light intensity of the light emitting diode device. And the directivity angle.The characteristics of the solid line indicate the relationship when a light emitting diode having no optical axis shift is used, and the dotted line indicates the light emitting diode having the optical axis shift. This is a characteristic representing the relationship when used.

Further, as shown in FIG. 4, in the case of a light emitting diode device using three light emitting diodes, the sum of the characteristics representing the relationship between the light intensity and the directivity angle of each light emitting diode is equal to the light emitting diode device. The characteristics of the thin solid line indicate the characteristics indicating the relationship between the light intensity and the directivity angle of the light-emitting diodes, and the light-emitting diodes having no optical axis deviation are arranged so that the optical axis angles of the respective light-emitting diodes are slightly different. The characteristic representing the relationship between the individual light emitting diodes at that time, and the characteristic indicated by the thick solid line is the characteristic representing the sum of the characteristics representing the relationship between the individual light emitting diodes.

As is apparent from the characteristics shown in FIGS. 3 and 4, the light emitting diode device using one light emitting diode has a relatively narrow optical signal transmission range, whereas the light emitting diode device using one light emitting diode has three light emitting diodes. The light emitting diode device using the light emitting diode has a wide optical signal transmission range. Further, although not shown, in the case of a light emitting diode device using four or more light emitting diodes, three light emitting diodes are used. The optical signal transmission range is wider than that of the conventional light emitting diode device.

[0009]

In such a known light emitting diode device, when a plurality of light emitting diodes are mounted on a cap member in such a manner that the optical axis angles are slightly different from each other, each light emitting diode in the cap member is disposed. The configuration of the portion to which the diodes are attached is appropriately changed so that when each light emitting diode is attached to the cap member, the optical axis angle of each light emitting diode is oriented in a predetermined direction.

However, as shown in FIG. 4, a plurality of light emitting diodes, for example, three light emitting diodes are used, and the caps are set such that the optical axis angles of these light emitting diodes are oriented in a predetermined direction. When a light emitting diode device is mounted on a member and a commercially available light emitting diode is used, as described above, since a light emitting diode with an optical axis deviation is inevitably included, three light emitting diodes are used. The sum of the characteristics representing the relationship between the light intensity and the directivity angle in the light emitting diode does not become as shown by the thick solid line shown in FIG. 4, but as shown by the dotted line A or the dotted line B shown in FIG. When the light intensity near the bottom of the wave-shaped characteristic decreases, the maximum value of the wave in the optical signal transmission range decreases. It will produce a dead zone in the vicinity.
As described above, when the maximum value of the light intensity in the light emitting diode device becomes a wave shape, the optical signal transmission range in the light emitting diode device is substantially narrowed, or the light signal transmitted from the light emitting diode device is When the detection is performed, there is a problem that the linearity at the time of light detection and the detection sensitivity are adversely affected.

[0011] In order to eliminate the occurrence of such an adverse effect, at the time of attaching a plurality or one of the light emitting diodes to the cap member, or after attaching the same, the optical axis angle of one or more of the light emitting diodes is increased. However, in the known light emitting diode device, once the light emitting diode is attached to the cap member, the structure cannot be easily finely adjusted. The light emitting diode device comes to be configured in a state in which the optical axis angle is not finely adjusted, and a dead zone is generated in the optical signal transmission range, thereby substantially narrowing the optical signal transmission range or transmitting the optical signal in a predetermined angle direction. There is a problem that the range cannot be set.

SUMMARY OF THE INVENTION The present invention solves such a problem, and an object of the present invention is to easily adjust an optical axis angle when a light emitting diode is mounted on a cap member, to reduce an optical signal transmission range and to reduce an optical signal transmission range. An object of the present invention is to provide a light emitting diode device which eliminates an undesired shift in the angle direction of a signal transmission range.

[0013]

In order to achieve the above object, a light emitting diode device according to the present invention comprises a light emitting diode having a light emitting surface, a collar portion, and a lead, and a contact portion with which the collar portion abuts. A cover having a window through which a lead is inserted, an opening for accommodating the light-emitting surface, a lens cap connected to the opening and projecting in a spherical shape, and a holding unit connected to the opening to hold the cover in place A contact member of the cover having a funnel shape.
Having an inner surface of the outer periphery of the collar portion of the light emitting diode and the
By making frictional contact with the funnel-shaped inner surface of the contact part,
Means is provided for adjusting and fixing the optical axis position of the light emitting diode .

[0014]

According to the above means, when attaching the light emitting diode to the cap member, first, the collar portion of the light emitting diode is brought into contact with the contact portion provided on the cover, and the cover is brought into contact with the contact portion. The optical axis angle of the light emitting diode with respect to is adjusted as appropriate. At this time, the contact portion is preferably configured to have a funnel-shaped inner surface, and is configured to generate appropriate friction between the inner surface and the outer periphery of the collar portion of the light emitting diode. , Light emitting diode,
After the optical axis angle is finely adjusted manually with the collar part in contact with the contact part, the mounting position is held in the finely adjusted state, and then the optical axis angle is finely adjusted. By attaching the cover holding the light emitting diode in the cap state to the cap member, it is possible to easily and finely adjust the optical axis angle of the light emitting diode used, that is, the light axis angle of the light emitting diode used A light emitting diode device can be obtained.

If such a light emitting diode device is used,
Even if a plurality or one of the used light emitting diodes has an optical axis shift, the optical axis position of each of the light emitting diodes is in a predetermined angle direction, so that the dead zone is within the optical signal transmission range in the light emitting diode device. This prevents the optical signal transmission range from being substantially narrowed and the angular direction of the optical signal transmission range from being deviated from the predetermined angular direction.

[0016]

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

FIG. 1 is a cross-sectional view showing a first embodiment of a light emitting diode device according to the present invention, which shows a light emitting diode device using one light emitting diode.

As shown in FIG. 1, a light emitting diode (LED) 1 that generates light in the infrared region (infrared light) has a substantially shell shape, and a light emitting unit 1A that outputs infrared light, An oval collar 1B provided near the bottom of the portion 1A and slightly expanding in the radial direction, and provided at the bottom of the light emitting portion 1A;
And a lead 1C to which light emission power is supplied.
The cover 2 has a substantially rectangular flat shape, and has a contact portion including an oval-shaped opening and a funnel-shaped opening inner surface such that the outer peripheral portion of the flange portion 1B of the light-emitting diode 1 contacts. 2A and a rectangular window 2B through which the lead 1C of the light emitting diode 1 is inserted. The block-shaped cap member 3 is provided on the light emitting surface 1 of the light emitting diode 1.
An opening 3A having a substantially conical shape for accommodating a peripheral portion of the light emitting diode A, and a lens cap 3B connected to the opening 3A and protruding into a spherical shape for accommodating the vicinity of the tip of the light emitting surface 1A of the light emitting diode 1.
And a substantially rectangular holding portion 3C which is connected to the opening 3A and fits and holds the cover 2.

The light-emitting diode device according to the first embodiment having the above-described structure is assembled as follows.

First, the light emitting diode 1 and the cover 2 are prepared, and the lead 1C of the light emitting diode 1 is inserted into the window 2B from the contact portion 2A side of the cover 2, and the collar 1B of the light emitting diode 1 is After being engaged with the opening of the contact portion 2A, the flange portion 1B is moved toward the funnel-shaped inner surface of the contact portion 2A. At this time, friction occurs between the outer periphery of the collar portion 1B and the funnel-shaped inner surface of the contact portion 2A, and if the outer periphery of the collar portion 1B is shifted to a predetermined position on the funnel-shaped inner surface, the light emitting diode with respect to the cover 2 is formed. 1 is in a semi-fixed state, and the optical axis angle of the light emitting diode 1 with respect to the cover 2 is finely adjusted.

Next, the cap member 3 is prepared, and the cover 2 is provided.
Light-emitting surface 1 of fine-tuned light-emitting diode 1 attached to
A is inserted into the opening 3A of the cap member 3, and
The distal end of the light emitting surface 1A is inserted and stored in the lens cap 1B, and the cover 2 is fitted and held in the holding portion 3C of the cap member 3. In this case, the holding unit 3 </ b> C
The fitting surface of the cover 2 and the cap member 3 is processed so that the optical axis angle of the cover 2 is directed to a predetermined direction.
Is inserted and held in the holding section 3C, the optical axis angle of the light emitting diode 1 is automatically set.

Through this process, the light emitting diode device is assembled and assembled. The coarse adjustment of the optical axis angle of the light emitting diode 1 is automatically performed by fitting and holding the cover 2 in the holding portion 3C. Fine adjustment of the optical axis angle of the light emitting diode 1 occurs between the outer periphery of the flange 1B of the light emitting diode 1 and the funnel-shaped inner surface of the contact portion 2A of the cover 2 when the light emitting diode 1 is attached to the cover 2. This is done manually by friction.

As described above, according to the light-emitting diode device of the first embodiment, fine adjustment of the optical axis angle of the light-emitting diode 1 can be easily performed when the light-emitting diode 1 is mounted. A light emitting diode device that can easily perform fine adjustment of the optical axis angle of the light emitting diode 1 can be obtained, and according to this light emitting diode device, fine adjustment of the optical axis angle of the light emitting diode 1 used can be obtained. Is performed, it is possible to set the angle direction of the optical signal transmission range to a predetermined direction.

According to the light emitting diode device of the first embodiment, the fine adjustment of the optical axis angle of the light emitting diode 1 can be performed by fitting the light emitting diode 1 to the holding portion 3C of the block member 3 even after the light emitting diode 1 is mounted. If the cover 2 is removed from the fitting and holding, the fine adjustment can be performed again by the same process as that described above.

FIG. 2 is a block diagram showing a second embodiment of the light emitting diode device according to the present invention.
2A is a partially exploded perspective view on the front side, and FIG. 2B is a partially exploded perspective view on the rear side, showing a light emitting diode device using five light emitting diodes.

As shown in FIGS. 2A and 2B, a light emitting diode (LED) 5 for generating infrared light,
6, 7, 8, and 9 each have a light-emitting surface (without a figure number), a collar portion (without a figure number), and a lead (without a figure number).
And The covers 10, 11, 12, 13, and 14, which are made of five rectangular flat plates,
A contact portion (not shown) having a funnel-shaped inner surface for contacting the brim portions of 6, 7, 8, 9 and a lead of the light emitting diodes 5, 6, 7, 8, 9 are inserted through the contact portion. Windows 10A,
11A, 12A, 13A and 14A. The block-shaped cap member 15 has substantially conical openings (not shown) into which the light-emitting surfaces of the light-emitting diodes 5, 6, 7, 8, and 9 are inserted. Five lens caps 16, 17,
18, 19, 20 and 5 covers 10, 11, 12,
13 and 14 are respectively provided with five holding portions (not shown) for fitting and holding. In addition, five lens caps 1
6, 17, 18, 19, and 20 are formed on each of the projecting outer peripheral surfaces with a light diffusion filter having a wrinkle pattern.

The light emitting diode device of the second embodiment having the above-described structure is assembled and configured according to the light emitting diode device of the first embodiment already described. 7, 8, 9 and cover 1
0, 11, 12, 13, and 14 are prepared. in this case,
For example, as for the light emitting diode 5, the lead is inserted through the window 10A from the contact portion side of the corresponding cover 10, and the collar portion of the light emitting diode 5 is engaged with the opening of the corresponding contact portion of the cover 10. After that, the brim portion is moved toward the funnel-shaped inner surface of the contact portion. At this time, friction occurs between the outer periphery of the collar portion of the light emitting diode 5 and the funnel-shaped inner surface of the contact portion of the cover 10, and the outer periphery of the collar portion of the light emitting diode 5 is formed in the funnel shape of the contact portion of the cover 10. If the light emitting diode 5 is shifted to a predetermined position on the inner surface, the arrangement position of the light emitting diode 5 with respect to the cover 10 is in a semi-fixed state, and the optical axis angle of the light emitting diode 5 with respect to the cover 10 is finely adjusted. The same is true for the other light emitting diodes 6, 7, 8, and 9 and the corresponding covers 11, 12, 13, and 14, and the light emitting diodes 6, 7, 8, 9 for the covers 11, 12, 13, and 14 are the same. Are finely adjusted.

Next, a cap member 15 is prepared. For example, the light-emitting surface of the finely adjusted light-emitting diode 5 attached to the cover 10 is inserted into an opening of the cap member 15 corresponding to the light-emitting diode 5. Diode 5
The tip of the light emitting surface is inserted and stored in the lens cap 16, and the cover 10 is attached to the light emitting diode 5 of the cap member 15.
Is fitted and held in the holding section corresponding to. In this case, the holding portion corresponding to the light emitting diode 5 has the fitting surface between the cover 10 and the cap member 15 machined so that the optical axis angle of the light emitting diode 5 is oriented in a predetermined direction.
The optical axis angle of the light emitting diode 5 is automatically set by inserting and holding 0 in the holding portion corresponding to the light emitting diode 5. Further, the finely adjusted light emitting diode 6 attached to the other cover 11, the finely adjusted light emitting diode 7 attached to the cover 12, the finely adjusted light emitting diode 8 attached to the cover 13, and the fine adjustment attached to the cover 13. The same applies to the light-emitting diode 9 that has already been completed. The cover 11 is used as a holder corresponding to the light-emitting diode 6, the cover 12 is used as a holder corresponding to the light-emitting diode 7, the cover 13 is used as a holder corresponding to the light-emitting diode 8, The optical axis angles of the light emitting diodes 6, 7, 8, 9 are automatically set by fitting and holding the cover 14 in the holding portions corresponding to the light emitting diodes 9, respectively.

Through these steps, the light emitting diode device is assembled and assembled.
Coarse adjustment of the optical axis angles of 6, 7, 8, and 9 is performed by covering the light-emitting diodes 5, 11, 12, 13, and 14, respectively.
This is automatically performed by fitting and holding the holding portions corresponding to 6, 7, 8, 9 and the light emitting diodes 5,
Fine adjustment of the optical axis angles of 6, 7, 8, 9 is performed by covering the light emitting diodes 5, 6, 7, 8, 9 with the covers 10, 11, 1, respectively.
When attaching to the light emitting diodes 5, 13, and 14,
A cover 10, corresponding to the outer periphery of the brim portion of 6, 7, 8, 9;
This is manually performed by friction generated between the contact portions of the portions 11, 12, 13, and 14 and the funnel-shaped inner surface.

As described above, according to the light emitting diode device of the second embodiment, each of the light emitting diodes 5, 6,.
Fine adjustment of the optical axis angle of 7, 8, 9
The light-emitting diodes 5, 6, 7, 8, which can be easily mounted when mounting 6, 7, 8, 9 are used.
It is possible to obtain a light emitting diode device capable of easily fine-tuning the optical axis angle of the light emitting device 9 as shown in FIG. 4, and by using this light emitting diode device, as shown by a dotted line a or a dotted line b in FIG. There is no dead zone in the signal transmission range and the optical signal transmission range is not substantially reduced,
In addition, the angle direction of the optical signal transmission range can be made substantially coincident with the predetermined direction.

Also in the light emitting diode device of the second embodiment, fine adjustment of the optical axis angle of the light emitting diodes 5, 6, 7, 8, 9 is performed by attaching the light emitting diodes 5, 6, 7, 8, 9 to each other. Even after this, if the covers 10, 11, 12, 13, 14 fitted and held in the holding portions corresponding to the light emitting diodes 5, 6, 7, 8, 9 of the block member 15 are removed from the fitted holding, Again, fine adjustments can be made by the same process as described above.

In the first and second embodiments described above, the light emitting diodes 1, 5 to 9 generate infrared light. However, the light emitting diodes 1, 5 to 9 according to the present invention have been described. Items 9 to 9 are not limited to those that generate infrared light, and may be those that generate visible light.

[0033]

As described above in detail, according to the present invention, the light emitting diodes 1, 5 to 9 are connected to the cap member 3,
15, first, the collar portions 1B of the light emitting diodes 1, 5 to 9 are brought into contact with the contact portions provided on the covers 2, 10 to 14, and the collar portion 1B is brought into contact with the contact portions. The light emitting diode 1 for the cover 2, 10 to 14
Fine adjustment of the optical axis angle of 5 to 9 is performed. At this time, the contact portion preferably has a funnel-shaped inner surface, and the inner surface and the light emitting diodes 1, 5 to 9
The light emitting diodes 1, 5 to 9 are configured so as to generate appropriate friction with the outer periphery of the collar portion 1B.
After the optical axis angle is finely adjusted manually with the collar portion 1B in contact with the contact portion, the mounting position is held in the finely adjusted state, and then the optical axis angle is finely adjusted. By attaching the covers 2, 10 to 14 holding the light emitting diodes 1, 5 to 9 in the mounted state to the cap members 3, 15, the light emitting diode device in which the optical axis angles of the light emitting diodes 1, 5 to 9 are finely adjusted, that is, There is an effect that a light emitting diode device which can easily finely adjust the optical axis angles of the light emitting diodes 1, 5 to 9 to be used is obtained.

According to the light emitting diode device,
Even if the plurality of or one of the light emitting diodes 1, 5 to 9 used have an optical axis shift, the optical axis positions of the light emitting diodes 1, 5 to 9 are in the respective predetermined angular directions. There is also an effect that a dead zone is not generated in the optical signal transmission range in the diode device to substantially narrow the optical signal transmission range, and the angle direction of the optical signal transmission range does not deviate from a predetermined angle direction.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a light emitting diode device according to the present invention.

FIG. 2 is a partially exploded perspective view showing a second embodiment of the light emitting diode device according to the present invention.

FIG. 3 is a characteristic diagram showing a relationship between light intensity and directivity angle in a known light emitting diode device using one light emitting diode.

FIG. 4 is a characteristic diagram showing a relationship between light intensity and directivity angle in a known light emitting diode device using three light emitting diodes.

[Explanation of symbols]

 1, 5, 6, 7, 8, 9 Light emitting diode (LED) 1A Light emitting surface 1B Collar 1C Lead 2, 10, 11, 12, 13, 14 Cover 2A Contact 2B, 10A, 11A, 12A, 13A 14A Window 3, 15 Capping member 3A Opening 3B, 16, 17, 18, 19, 20 Lens cap 3C Holding part

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Umeda 1-7 Yukitani Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd. (56) References JP-A-6-104491 (JP, A) 59-17486 (JP, U) Japanese Utility Model Showa 49-107271 (JP, U) Japanese Utility Model Showa 49-85066 (JP, U) Japanese Utility Model Utility Model 5-72148 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01L 33/00

Claims (2)

(57) [Claims] A light emitting diode having a light emitting surface, a collar portion, and a lead; a cover having a contact portion with which the collar portion contacts and a window through which the lead is inserted; and an opening for receiving the light emitting surface. And a cap member having a lens cap connected to the opening and projecting into a spherical shape and connected to the opening, and a holding part that fits and holds the cover .
The contact portion of the cover has a funnel-shaped inner surface, and
The outer circumference of the collar of the iode and the funnel-shaped inner surface of the contact part
By friction contact, the optical axis position of the light emitting diode
A light emitting diode device, wherein the position is adjusted and fixed . 2. The light emitting diode device according to claim 1 ,
A plurality adjusted and fixed to the cover so that the shaft positions are different
Light emitting diodes, and the cap member is
In response to multiple light emitting diodes,
Including the opening, the lens cap, and the holding unit.
The light emitting diode device of claim 1, characterized in that there.