JP2597985B2 - Flat LED - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an LED in which an LED chip is sealed in a lens and an electrode connected to the LED chip is extended outside. L with a flat shape
About ED.

[Summary of the Invention]

According to the present invention, a lens enclosing an LED chip is formed into a flat shape, and electrodes connected to the LED chip are formed in a plate shape, thereby making the LED as a whole a flat shape.

[Conventional technology]

Conventionally, LEDs have been used as light emitting elements. A conventional LED 1 is configured as shown in FIG. 11 and FIG. 12, and has an LED in a lens 2 having a substantially hemispherical tip.
It has a structure in which a chip is sealed, and a pair of electrodes 3 connected to the chip extend from the base end side of the lens 2. Such an electrode 3 is inserted into a lead insertion hole of a printed wiring board, and is connected to a conductive pattern on the back surface of the printed circuit board by soldering.

[Problems to be solved by the invention]

When such a conventional LED 1 is used, for example, as a light emitting element of a card type transmitter 4 for a remote controller, an LED lens 2
Has the disadvantage that its diameter is too large. In addition, since the electrode 3 has a square rod shape, it is suitable for connection by soldering.
The structure is not suitable for joining with a conductive adhesive. Further, since such an electrode 3 is hard, there is a disadvantage that when an external force is applied to the LED 1 in bonding with an adhesive, the bonded portion is peeled off and the wire is broken, or the LED 1 falls off.

The present invention has been made in view of such a problem, and can be used in combination with a flat device such as a card-type transmitter for remote control, and is suitable for connection using a conductive adhesive. It is intended to provide a type LED.

[Means for solving the problem]

The present invention arranges a pair of flat plate-shaped electrodes substantially in parallel with each other on a common plane so that the main plane is substantially parallel to the main plane of the flat lens,
The flat LED chip is extended from the base end side to the outside, and the flat LED chip is arranged such that both ends of one main plane of the flat LED chip are placed on the main planes of the pair of electrodes and are in direct contact with each other. The chip is sealed in the lens with its main plane being substantially parallel to the main plane of the lens and the pair of electrodes, and the lens is disposed at the distal end almost opposite to the base end where the pair of electrodes of the lens extends. The present invention relates to a flat LED in which a lens section is provided and light from the LED chip is condensed by the lens section.

[Operation] According to the present invention, when a current flows through a flat LED chip sealed in a lens through a pair of electrodes extending to the outside from the base end side of the lens, the LED chip emits light. The light from the LED chip is condensed by a lens portion provided on the front end side of the lens and is emitted to the outside.

〔Example〕

Hereinafter, the present invention will be described with reference to one embodiment shown in the drawings. FIGS. 1 to 3 show a flat-sided LED 10 according to an embodiment of the present invention. The LED 10 has a flat, substantially semicircular lens 11. An LED chip 12 is sealed in the lens 11. The LED chip 12 is connected to a pair of electrodes 13 and 14, and these electrodes 13 and 14 are formed in a plate shape. The plate-shaped electrodes 13 and 14 extend from the base end side of the lens 11 to the outside on a plane parallel to the main plane of the flat lens 11. Further, an arc-shaped portion formed at the tip of the lens 11 constitutes a lens portion 15 so that light emitted from the chip 12 is collected.

As described above, since the flat LED 10 according to the present embodiment includes the flat lens 11 and the flat plate-shaped electrodes 13 and 14, the overall shape is flat. Therefore, even when such a flat LED 10 is used for a card-type remote controller transmitter 16 as shown in FIG. 4, for example, the LED 10 will not be too thick compared to the card 16 and It is suitable for use in combination. Further, since the electrodes 13 and 14 have a large surface area, the electrodes 13 and 14 can be connected to the wiring pattern of the transmitter 16 using a conductive adhesive. It is possible to obtain a target strength. Therefore, according to such an LED 10, the portions of the electrodes 13 and 14 are peeled off and disconnected, or
Can be prevented from falling off.

Next, a modified example of the above embodiment will be described. FIG. 5 or FIG. 6 shows an application to a polarized LE10, in which two electrodes 13, 14 are shown to indicate the polarity.
The shape is changed. That is, according to the modification shown in FIG. 5, the polarity of one electrode 13 can be determined by making the one electrode 13 larger than the other electrode 14. Also, as shown in FIG. 6, a pair of protrusions 17,
In addition to forming the projections 18, the projection lengths of these projections 17, 18 may be changed.

The modification shown in FIG. 7 is intended to surely prevent the flat LED 10 from falling off. In the modification, projections 17 and 18 are formed on a pair of electrodes 13 and 14, respectively. A projection 26 is formed on the side, and a projection 27 is inserted between the projections 17 and 18 and the projection 26. According to such a configuration, a stopper is formed by the protrusions 17 and 18 engaged with the protrusions 27, so that even when an external force is applied to the lens 11, the LED 10 does not fall out, and mechanical coupling is prevented. More power. Therefore, it is possible to provide a flat LED that can be securely fixed.

Next, a description will be given of a modification in which the bonding strength by the conductive adhesive is increased. In order to achieve such an object, as shown in FIG.
A large number of grooves 22 may be formed. In this modification, a protrusion 21 is formed on the side of one electrode 13. Alternatively, as shown in FIG.
Small holes 23 are formed in the holes 3 and 14, respectively, and the bonding strength is increased by the conductive adhesive introduced into the small holes 23. Alternatively, as shown in FIG. 10, the cuts 24 are formed on the sides of the electrodes 13 and 14 or the sides of the protrusions 17 and 18, respectively, so that the bonding strength between the conductive adhesive and the conductive adhesive can be improved. To increase. Therefore, according to such a modified example, it is possible to obtain a flat LED that can be firmly joined using a conductive adhesive.

〔The invention's effect〕

As described above, the present invention relates to a pair of flat plates which are arranged substantially parallel to each other on the same common plane, have a flat plate shape, and are arranged such that the main plane is substantially parallel to the main plane of the lens. Electrodes are extended from the base end side of the flat lens to the outside, and the flat LED chips are placed on the main planes of the pair of electrodes at least on both side ends of one of the main planes so that they are in direct contact with each other. The main plane of the LED chip is sealed in the lens in a state substantially parallel to the main plane of the lens and the pair of electrodes, and light from the LED chip is substantially opposite to the base end from which the pair of electrodes extends. The light is condensed by a lens provided at the tip of the lens.

Therefore, according to the present invention, in particular, the principal plane of the electrodes arranged substantially in parallel on the same common plane as the principal plane of the flat lens and the principal plane of the flat LED chip are arranged substantially in parallel with each other. Since the two end faces of one main plane of the LED chip are placed on the main plane of the pair of electrodes, and the pair of electrodes are in a flat plate shape, the LED has a very flat shape as a whole. Can be obtained, and a flat LED that can be used in combination with a flat device can be provided.

In addition, since both ends of one main plane of the LED are placed on the main plane of a pair of electrodes arranged substantially parallel to each other on the same common plane, they are in direct contact with each other, There is no need to connect the LED chip and the pair of electrodes to each other with lead wires, which simplifies the structure, reduces the number of assembling steps, and reduces the overall size.

In addition, since the pair of electrodes each have a flat plate shape and extend outward from the base end of the lens, an external circuit is formed by using such an electrode and using a conductive adhesive. And an electrical connection can be achieved.

[Brief description of the drawings]

1 is an external perspective view showing a flat type LED according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a card type transmitter using this LED. Appearance perspective view, fifth
FIG. 10 is a plan view of a flat LED according to a modification, FIG.
FIG. 12 is a plan view of a conventional LED, FIG. 12 is a side view thereof, and FIG. 13 is an external perspective view of a card-type transmitter using the conventional LED. In the reference numerals used in the drawings, 10: flat LED 11: lens 12: LED chip 13, 14, electrode 15: lens unit 16: remote controller card type transmitter.

Claims (5)

(57) [Claims] 1. A flat lens, which is disposed substantially in parallel with each other on a common plane, has a flat plate shape, and has a principal plane disposed substantially parallel to the principal plane of the lens. A pair of electrodes extending to the outside from the end side, at least both side end sides of one of the main planes are placed on the main planes of the pair of electrodes, respectively, and are in direct contact with each other. A flat LED chip sealed in the lens in a state substantially parallel to a main plane of the lens and the pair of electrodes; and a side substantially opposite to a base end of the lens from which the pair of electrodes extends. And a lens unit provided at the tip of the LED and condensing light from the LED chip. 2. The flat-type LED according to claim 1, wherein means for increasing the bonding strength when bonding with a conductive adhesive is provided on said pair of electrodes. 3. The device according to claim 2, wherein said means for increasing the bonding strength comprises a plurality of grooves formed on a main plane of said electrode in a direction inclined with respect to a length direction thereof. 3. The flat LED according to item 2. 4. The patent according to claim 1, wherein said means for increasing the bonding strength comprises a small hole penetrating through the main plane of said electrode in the thickness direction of said electrode and introducing a conductive adhesive therein. The flat LED according to claim 2. 5. The flat-type LED according to claim 2, wherein said means for increasing the bonding strength comprises a cut formed in a side portion of said pair of electrodes.