JPH0749510Y2 - LED display lamp - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an LED display lamp having a lens portion molded by a resin mold and including a plurality of LEDs arranged side by side on a substrate. Is.

[0002]

2. Description of the Related Art Conventionally, such an LED indicator lamp is constructed as shown in FIG. 4, for example. That is, the LED display lamp 1 is mounted on the substrate 3 mounted in the case 2,
It is composed of a plurality of LEDs 4 arranged side by side. As shown in FIG. 5, each LED 4 has a lens portion 4a having a circular cross section formed by resin molding so as to surround an LED chip (not shown),
For example, a predetermined light distribution characteristic as shown in FIG. 6 is realized. Further, on the substrate 3, a lens 5 having a honeycomb structure is attached so as to cover the upper side of each LED 4.
The individual lenses 5a arranged in a honeycomb shape of the lens 5 are located on the optical axis of each LED 4.

According to the LED display lamp 1 having such a configuration, when the LED 4 is made to emit light by supplying power to each LED 4 from a driving circuit (not shown), the L
Light from the ED 4 is emitted from the LED 4 with a predetermined relatively narrow light distribution characteristic by the action of each lens portion 4a molded by a resin mold, and is further arranged on the optical axis in front of each LED 4. By the action of each lens 5a of the lens 5, the light is diffused so as to have a relatively wide light distribution characteristic, and then is emitted to the outside, whereby visibility over a relatively wide range is obtained. It is like this.

[0004]

However, in the LED display lamp 1 thus constructed, each LE is
Since the light distribution characteristic of the lens portion 4a of D4 is relatively narrow as shown in FIG. 4, it is necessary to provide the lens 5 having a honeycomb structure which is separately configured. There is a problem that the manufacturing cost becomes high due to the complexity.

In view of the above points, the present invention has made it possible to reduce the cost by obtaining a relatively wide light distribution characteristic without the need for a separate lens.
It is intended to provide an LED display lamp.

[0006]

In order to achieve the above object, an LED display lamp of the present invention comprises a lens portion molded by a resin mold, and a plurality of LED lamps arranged side by side on a substrate. The LED is included, and the cross-section of the lens portion formed by resin molding of each LED is formed to have an elliptical shape that extends long along one direction perpendicular to the optical axis. It is characterized in that they are arranged on the substrate such that their long axis directions are alternately oriented in the vertical direction.

[0007]

According to the above construction, since the lens portion of each LED has an elliptical cross section elongated along one direction perpendicular to the optical axis, each LED is compared in the longitudinal direction. Since it has a relatively wide light distribution characteristic and is arranged such that its major axis directions are alternately vertical, a relatively wide light distribution characteristic can be obtained as a whole, therefore, Good visibility can be obtained over a wide range. At this time, since it is not necessary to dispose a separately configured lens in front of each LED, the number of parts is small, the configuration is simple, and the assembly is easy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows the construction of an embodiment of an LED display lamp according to the present invention. The LED display lamp 10 is composed of a plurality of LEDs 13 arranged side by side on a substrate 12 mounted in a case 11.

As shown in FIG. 2, each LED 13 is LE
It has a lens portion 13a formed by resin molding so as to surround a D chip (not shown). The above configuration is similar to that of the conventional LED display lamp 1 shown in FIG. 4, but in the LED display lamp 10 according to the present invention, each LED 13 is configured as follows.
That is, as shown in FIG. 2, the lens portion 13a of the LED 13 is formed by resin molding so that the cross section thereof has an elliptical shape extending long along one direction x perpendicular to the optical axis. Thus, the LED13 is, with respect to its direction x, as shown in FIG. 3 (A), which has a relatively wide light distribution characteristic, with respect to the direction x perpendicular to the other direction y, FIG. As shown in FIG. 3 (B), it has a relatively narrow light distribution characteristic similar to the conventional one.

The LED 13 having such a light distribution characteristic
As shown in FIG. 1, are arranged on the substrate 12 so that their long axis directions are alternately oriented in the vertical direction.

The LED display lamp 10 according to the present invention is constructed as described above, and when each LED 13 is caused to emit light during use, the light from the LED 13 is caused by the action of the lens portion 13a in each direction x. The light is emitted from the lens portion 13a with a relatively wide and relatively narrow light distribution characteristic in the other direction y, and therefore, a relatively wide alignment characteristic is obtained as a whole, which is favorable over a relatively wide angle. It is possible to secure a high level of visibility, and an easy-to-see lighting display can be realized.

[0012]

As described above, according to the present invention, since the lens portion of each LED has an elliptical cross section elongated along one direction perpendicular to the optical axis, LED
Has a relatively wide light distribution characteristic with respect to its long axis direction and is arranged so that its long axis direction is alternately vertical, so that as a whole, a relatively wide light distribution characteristic is obtained. As a result, good visibility can be obtained over a wide range. At this time, since it is not necessary to dispose a separately configured lens in front of each LED, the number of parts is small, the configuration is simple and the assembly is easy, and the cost is reduced. Thus, according to the present invention, there is provided an LED display lamp which can reduce the cost by obtaining a relatively wide light distribution characteristic without requiring a separate lens.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of an LED display lamp according to the present invention.

2 is an enlarged cross-sectional view of a lens portion of the LED in the embodiment of FIG.

3 is a graph showing the light distribution characteristics of the LED of FIG.
(A) shows the light distribution characteristics in one direction x, and (B) shows the light distribution characteristics in the other direction y.

FIG. 4 is a schematic sectional view showing an example of a conventional LED display lamp.

5 is an enlarged vertical sectional view of an LED of the LED display lamp of FIG.

6 is a graph showing the light distribution characteristics of the LED of FIG.

[Explanation of reference numerals] 10 LED display lamp 11 case 12 substrate 13 LED 13a lens part

Claims (1)

[Scope of utility model registration request] 1. An LED display lamp comprising a resin-molded lens portion and including a plurality of LEDs arranged side by side on a substrate, wherein each LE is
The lens portion molded by the resin mold D is formed so that its cross section has an elliptical shape extending long along one direction perpendicular to the optical axis, and each LED has its length on the substrate. An LED display lamp, characterized in that it is arranged such that the axial directions thereof are alternately oriented in the vertical direction.