JP5074696B2 - Light emitting diode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting diode display device which has little decline in contract or view angle, even if light emitting diodes are arranged in line and the bases of these light emitting diodes are coated with a resin material. <P>SOLUTION: Each of the light emitting diodes comprises a light emitting element 2, a lead 3 for supplying power to the light emitting element 2, a base 4 for covering the lead 3, lens 5 having a convex emission surface which is so formed as to be joined together with the base 4 and cover the light emitting element 2, and step 6 which is so arranged as to surround the external side face of the lens 5 and has a portion having a different width. The step 6 has a height which specifies an amount of the resin material enough to cover the lead 3 and the base 4. In order to form the light emitting diode display device, a plurality of such light emitting diodes are arranged in line and then the resin material is injected in an amount specified by the step 6. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a light emitting diode (hereinafter referred to as “LED”) that is mounted as a display such as an outdoor display.

As an outdoor display, a plurality of LEDs that are fixed to a base portion and have a light emitting surface having a convex lens (or a bullet-shaped lens) may be used. This conventional LED is shown in FIGS. 5A and 5B. Here, FIG. 5A is a top view of a conventional LED 100 having a convex lens portion, and FIG. 5B is a front view of the LED shown in FIG. 5A when viewed from the Y direction. As shown in FIGS. 5A and 5B, the conventional LED 100 includes an LED element 20, a lead portion or lead frame 30 connected to the LED element 20, and a base portion 40 that supports a convex lens 50 that covers the LED element 20. I have.
When the LED display device 200 is formed using a plurality of the LEDs 100, a black resin material is generally provided between the LEDs 100 in order to prevent a decrease in contrast due to reflection at the base portion 40. Is.

  As an example of LED100 and LED display device 200 provided with said resin material, LED described in patent document 1 is mentioned, for example. This Patent Document 1 discloses a conventional light emitting diode lamp (light emitting diode display device) in which a plurality of LEDs each having a convex lens are arranged on a substrate and a black resin material is injected between the LEDs. Are listed.

In general, when a resin material is injected between a plurality of LEDs arranged in a row, it is difficult to confirm that the resin material is injected in a desired amount (or an amount that achieves an appropriate height). In particular, when the resin material is in contact with the convex lens portion (radiation surface) when the resin material is injected, the surface of the resin material is caused by the surface tension of the resin material at the portion in contact with the lens portion as shown in FIG. Meniscus shape. Then, the resin material 110 may cover the lens part 50 which is a light emission surface exceeding a desired height. In this case, since the light emitted from the lens portion is absorbed by the resin material, the contrast and the viewing angle may be lowered.
JP-A-6-85329

  The present invention facilitates filling of a resin material when a base portion of an LED including a lens portion having a hemispherical light emitting surface is covered with a resin material.

  The present invention includes a base portion, a lens portion that has a hemispherical light emission surface on the base portion, and a step portion that is between the base portion and the lens portion and has a larger diameter than the lens portion. A light emitting diode is provided.

  Here, in the light emitting diode, the step portion has a notch or a protrusion, the lens portion and the step portion are integrally formed, the light emitting surface side, and the base portion. An aspect in which the area of the step part when viewed from a direction perpendicular to the direction is less than half of the remaining area of the base part excluding the area occupied by the lens part, and the position of the notch is the polarity of the light emitting diode There exists an aspect which represents.

  The present invention also provides a light-emitting diode display device comprising a plurality of any of the light-emitting diodes described above, wherein an amount of resin material defined by the height of the step portion is injected between the light-emitting diodes. .

  Further, the present invention includes a step of attaching a light emitting element and a lead portion for supplying power to the base portion, a step of attaching a lens portion having a hemispherical light emitting surface to the base portion so as to cover the light emitting element, Providing a step portion having a height that defines an amount of a resin material sufficient to cover the lead portion and having a portion having a different width in a part so as to surround the outer side surface of the lens portion. The manufacturing method of the light emitting diode which consists of these is provided. Here, it is preferable that the aspect further includes integrally molding the step portion and the lens portion. In this way, the step part and the lens part are integrally processed and molded (for example, using techniques such as injection molding, extrusion molding, casting, casting mold, cutting, light irradiation, etc.), so that the efficiency of the mounting operation is improved. The manufacturing cost can be reduced.

  According to the present invention, the resin material is configured not to directly contact the lens portion by the step portion provided on the outer side surface of the lens portion having the hemispherical light emitting surface protruding from the base portion. And the height of this step part prescribes | regulates the quantity of the resin material sufficient to cover the lead part and base part of LED reliably. In addition, by providing a notch in the step portion, an operator can easily confirm that the injected resin material is about to reach a predetermined amount. Therefore, it is possible to easily inject an appropriate amount of a resin material, and it is possible to provide an LED that solves problems such as a decrease in contrast and a decrease in viewing angle. Further, by using a plurality of the above-described LEDs, an LED display device having a high contrast and a wide viewing angle that can be used as an outdoor display can be obtained.

1A and 1B show a light emitting diode 1 used in the practice of the present invention. Here, FIG. 1A shows a case where the LED used in the embodiment of the present invention is viewed from the direction perpendicular to the base portion on the light emission surface side. Moreover, FIG. 1B has shown the case where LED of FIG. 1A is seen from X direction (direction parallel to a base part).
The light emitting diode 1 is coupled to the light emitting element 2 such as an LED element, a lead or lead frame 3 for supplying power to the light emitting element 2, a base portion 4 covering the lead 3, and the base portion 4. A lens unit 5 having a hemispherical light emission surface provided so as to cover and a step unit 6 disposed so as to surround the outer side surface of the lens unit 5 and having a part having a different width. Become. Here, the step portion 6 has a height that defines an amount of the resin material sufficient to cover the lead or the lead frame 3 and the base portion 4.

  FIG. 2 shows an LED display device 10 produced by using a plurality of LEDs 1 in FIG. 1 and injecting an amount of resin material 7 defined by the step portion 6 of the LEDs 1. Here, the step portion 6 prevents the resin material 7 injected so as to cover the base portion 4 from coming into contact with the lens portion 5. In addition, as shown in FIG. 2, when the resin material 7 is injected up to the height of the step portion 6, the shape of the resin material 7 in contact with the step portion 6 is separated from the step portion 6 due to the surface tension. A shape that rises. This means that even when the injection amount of the resin material 7 to be injected is a little large, it has a structure that does not adversely affect the characteristics of the LED 1 or the display device 10 using the LED 1 compared to the conventional product. It is advantageous.

  In FIG. 3, the aspect which provided the notch in the step part 6 of LED1 is shown. In FIG. 3, notches 60A and 60B are shown. The notches 60A and 60B can represent the polarity of the LED 1 depending on their positions. The polarity here may include the positive and negative positions of the electrode. Thereby, the worker can easily understand the polarity of the LED.

  Further, as shown in FIG. 4, by determining whether or not the resin material 7 has reached the notches 60A and 60B, it is easy for the worker that the resin material 7 is reaching an appropriate injection amount. I can understand.

  3 and 4, the case where the notches 60A and 60B are provided has been described. However, the present invention is not limited to this, and for example, a protrusion may be provided on the step portion 6.

  As mentioned above, although LED1 used for implementation of this invention and the display apparatus 10 using this were demonstrated, these are only illustrations, In order to implement this invention described in the claim, It should be understood by those skilled in the art that many device configurations different from the device configurations described above can be employed.

A is a top view which shows the state when LED used for implementation of this invention is seen from the light emission surface side and the direction perpendicular | vertical to a base part. B is a front view when the LED shown in A is viewed from the X direction. It is sectional drawing of the LED display apparatus which inject | poured the quantity of resin materials prescribed | regulated by the step part of LED using multiple LED of FIG. It is a top view which shows the aspect which provided the notch part showing the polarity of LED in the step part of LED of FIG. It is a top view which shows the aspect which inject | poured the resin material into LED of FIG. A is a top view of a conventional LED having a convex lens portion. B is a front view of the LED shown in A when viewed from the Y direction. FIG. 6 is a cross-sectional view of an LED display device in which a plurality of conventional LEDs of FIG. 5 are used and a resin material is injected between the LEDs.

Explanation of symbols

1 Light emitting diode (LED)
2 LED element 3 Lead part, lead frame part 4 Base part 5 Lens part 6 Step part 60A, 60B Notch 7 Resin material 10 LED display device

Claims (6)

A method for manufacturing a light emitting diode display comprising a plurality of light emitting diodes, comprising:
A base portion, and the base portion being arranged on the lens portion to generate a plurality of light emitting diodes and arranged step portion, is respectively provided between said base portion and said lens unit, wherein, The step portion is generated to have a side surface having a predetermined height and an upper surface having a diameter larger than the diameter of the lens portion and smaller than the length or width of the base portion,
Arranging the plurality of light emitting diodes side by side;
Between each of the plurality of light emitting diodes, the resin material is injected to the vicinity the predetermined height of the step portion in contact with the side surface of the step portion, wherein said predetermined of said step portion height, which defines the amount of the resin material, and,
In order to prevent the resin material from coming into contact with the lens portion even when the resin material slightly exceeding the specified amount is injected, the resin material is caused by its surface tension. , as the distance from the side surface of the step portion, so that the raised shape beyond said predetermined height, forming the resin material
Including
The lens unit includes a light emitting surface of the semi-spherical and consists to have a light-emitting diode element inside method. Further comprising the method of claim 1 providing a notch or protrusion on the step portion. Further comprising the method of claim 1 or 2 that integrally molded with said step portion and said lens unit. Since the area of the step portion when viewed from a direction perpendicular to the base portion to a light emitting surface side is less than half of the remaining area of the base portion except for the area occupied by the lens section comprising a method according to any one of claims 1 to 3. Position of the notch or protrusion consists illustrates a polarity of the light emitting diode, the method according to any one of claims 2 to 4. The cutout, it into the notch by determining whether said resin material has reached is for the resin material to check worker that is reaching the injection amount of the prescribed The method according to claim 2, comprising :

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