JP2002163912A - Light emitting equipment system and light emitting diode array - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost of light emitting equipment. SOLUTION: This light emitting diode array 10 is constituted with two or more light emitting diodes 12 arranged at equal intervals on a surface of a circuit board 11, and connected in series to a power supply 7, and a substrate connection part 15 prepared so that the intervals of each the mutual light emitting diodes 12 may be maintained when combining two or more of the circuit board 1, at the both ends of the light emitting diode arrangement direction on the circuit board 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device system and a light emitting diode array used as a light source for a vehicle such as a high-mount stop lamp, a light source for a display, and the like.

[0002]

2. Description of the Related Art In general, light bulbs are used as exterior light sources for automobiles. In recent years, light emitting diode lamps characterized by low power consumption, low heat generation and maintenance-free have been spotlighted as alternatives to light bulbs. I have.

[0003] As a light emitting diode to be applied to a light emitting diode lamp, a type having a relatively narrow directivity called a shell type has been put to practical use.

When a light emitting diode lamp using a bullet-shaped light emitting diode is used as a high-mount stop lamp for an automobile, the interval of mounting the light emitting diode on a substrate is reduced due to the directivity of the light emitting diode.
In order to secure a certain level of luminance, it is necessary to use a large number of light emitting diodes.

When the light emitting diode lamp is used as a tail lamp of a car, the brightness of the light is not sufficient as compared with a light bulb. Therefore, it is necessary to arrange the light emitting diode over almost the entire display area of the tail lamp. It is necessary to set the number of substrates for the number of types of tail lamps.

[0006]

As described above, in the conventional light emitting diode lamp, it is necessary to use a large number of light emitting diodes due to the directivity of the light emitting diode, and there is a problem in cost.

[0007] In addition, since the light emitting diode has insufficient brightness compared to a light bulb, it is necessary to dispose the element up to the corner of the lamp vessel. In addition, there is a cost problem in terms of manufacturing and manufacturing.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a light emitting device system and a light emitting diode array which can reduce costs.

[0009]

In order to achieve the above object, the light emitting diode array according to the first aspect of the present invention is arranged at regular intervals on the surface of a substrate and connected in series to a power supply. A plurality of light emitting diodes, and a substrate connecting portion provided at at least one end in the light emitting diode arrangement direction on the substrate, so as to maintain a distance between the light emitting diodes when connecting and connecting a plurality of the substrates. It is characterized by having. The light-emitting diode array according to the second aspect of the present invention is arranged at regular intervals on the surface of the substrate, and is orthogonal to the arrangement direction of the plurality of light-emitting diodes connected in series to the power supply and the light-emitting diodes on the substrate. At least one end in the direction is provided with a substrate connecting portion provided so as to keep a space between the light emitting diodes when combining and connecting a plurality of the substrates. A light emitting diode array according to a third aspect of the present invention is the light emitting diode array according to any one of the first and second aspects, wherein the substrate connecting portion has an engagement relationship with an end of the substrate and an opposite end of the substrate. It is characterized by comprising an engaging portion formed so as to form a connector, and a connector mounted on the engaging portion to connect the circuit wiring of its own board to the circuit wiring of another substrate in parallel. A light emitting diode array according to a fourth aspect of the present invention is the light emitting diode array according to any one of the first and second aspects, wherein the insulating member is interposed directly on the back surface of the substrate so as to avoid the substrate connecting portion. It is characterized by further comprising attached heat radiating means. A light emitting device system according to a fifth aspect of the present invention includes a plurality of light emitting device containers set for each light emitting device, and one or a plurality of light emitting device containers for each type of the light emitting device. The light-emitting diode array according to any one of Items 1 and 2 is provided.

According to the present invention, a plurality of light emitting diodes are arranged at equal intervals and a plurality of substrates can be connected in combination in a direction in which the light emitting diodes are arranged or in a direction orthogonal to the direction in which the light emitting diodes are arranged. If one light emitting diode array is designed and manufactured, it can be applied in combination to light emitting devices of various sizes, so that the parts seen from the light emitting device can be shared and standardized, and the total cost including design cost and manufacturing cost Product costs can be reduced.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a high mount stop lamp according to one embodiment of the present invention. As shown in FIG. 1, the high-mount stop lamp 1 is mounted at a position of a rear glass 3 at a rear portion of a vehicle body.

As shown in FIG. 2, the high-mount stop lamp 1 includes a light-emitting diode array 10 and a case 5 for accommodating the light-emitting diode array 10.

In the light emitting diode array 10 of this embodiment, five surface mount type light emitting diodes 12 are arranged on a surface of a circuit board 11 at equal intervals in a horizontal line, and a silicon rubber 13 is provided on a back surface of the circuit board 11. An aluminum heat sink 14 is attached with screws or the like.

The circuit board 11 of the light-emitting diode array 10 has two ends on the light-emitting diode array direction.
When connecting a plurality of circuit boards 11 in combination, the board connecting portion 1
5 are provided.

In this example, since a resin substrate (insulating substrate) such as a glass epoxy substrate having double-sided through holes is used as the circuit substrate 11, the silicon rubber 13 is used. If the wiring and the components can be arranged, the heat sink 14 may be directly attached without interposing the insulating means.

Alternatively, a substrate having a high thermal conductivity such as an aluminum substrate may be used. When an aluminum substrate is used, an insulating means such as a silicon rubber 13 is indispensable for insulation from the heat sink 14.

In addition to keeping the arrangement interval of the light emitting diodes 12 constant for the distance between the adjacent light emitting diodes in the circuit board 11, this circuit board 11 is arranged such that the other circuit boards 11 are arranged in the width direction (up and down in the drawing). Direction or left-right direction), the end portions are formed so as to keep the distance between the diodes constant even when they are joined together, and the connector is arranged there. That is, the board connecting portion 15 is configured by the end shape of the board and the connector arrangement.

Here, the circuit configuration of the light emitting diode array 10 will be described with reference to FIG. As shown in FIG. 3, the light emitting diode array 10 includes a circuit wiring in which a plurality of light emitting diodes 12 and a resistor 15 are connected in series to a wiring from a DC power source 7 of a vehicle, and each of the circuit wirings is connected in parallel to this circuit wiring. And a plurality of connectors (male connectors 16a, 17a, female connectors 16b, 17b).

In this example, the upper part of the right end of the circuit board 11 is cut out as the board connecting part 15 in the direction in which the light emitting diodes are arranged, and the cut out part projects from the left end of the circuit board 11. The male connector 16a is arranged by protruding the terminal below the cutout portion at the left end of the board, and the female connector 16b corresponding to the male connector 16a is arranged at the right end of the board. I have. That is, the right end and the left end of the circuit board 11 are in an engagement relationship.

As a board connecting portion 15 in a direction orthogonal to the direction in which the light emitting diodes are arranged, terminals are protruded downward from the lower end of the board toward the circuit board 11 so that a male connector 17 is provided.
a, and a female connector 16b for inserting and connecting the terminal of the male connector 17b is arranged at the upper end of the male connector 17a.

The light emitting diode 12 and the resistor 15 are mounted on the surface of the circuit board 11 by reflow soldering. The light emitting diode 12 has a wider directional characteristic than a conventional shell type. The plurality of light emitting diodes 12 are arranged so that the interval between them is constant. The resistor 15 is for limiting the current.
Male connectors 16a, 17a, female connectors 16b, 1
7b, the main body is mounted on the back surface of the circuit board 11, and its terminal portion is fixed by soldering on the front surface side through the board. Therefore, the heat sink 14 attached to the back surface of the circuit board 11 is cut out so as to avoid the corresponding portion where the connector is mounted. If the connector is a component for reflow, it can be mounted on the surface of the board.

When this configuration is defined as one unit, manufacturing and inspection are performed in units of one unit, and the corresponding size case 5
When attaching to the case 5, one or more units are combined and connected and attached to the case 5 to eliminate the need for a board design for each case size.

That is, when the light-emitting diode array 10 is one unit, a plurality of units are connected and connected by connectors 16a, 16b, 17a, and 17b, and the plurality of units are connected in parallel. Therefore, a plurality of units can emit light with the same luminance without changing the input voltage. Further, a light-emitting device having a width and a width that are an integral multiple of the unit can be configured, and can correspond to various types and sizes of high-mount stop lamps. If the light emitting diode array 10 is used in a one-unit configuration, the connectors 16a, 1
The attachment of 6b, 17a, 17b is unnecessary, and the cost can be reduced accordingly.

Here, examples in which the light emitting diode array 10 is applied to various sizes will be described. As shown in FIG. 5, two light emitting diode arrays 10 (2
When the units are connected in the longitudinal direction (long side direction) of the substrate, ten light emitting diodes 12 are arranged in a horizontal line (linear shape) at equal intervals, and the width is twice as large as that of one unit. It can be applied to a rod-shaped (linear) high-mount stop lamp. In particular, the spacing x of the light emitting diodes 12 between the connected units is kept the same as the spacing x with the others.

As shown in FIG. 6, when four light-emitting diode arrays 10 (four units) are connected in the short side direction of the substrate, a total of 20 light-emitting diodes 12 are arranged at equal intervals. Thus, it can be applied to a plate-shaped (planar) high-mount stop lamp.
In particular, the spacing x of the light emitting diodes 12 between the connected units
Is the same as the distance x from the others.

Further, by combining the examples shown in FIGS. 5 and 6, for example, as shown in FIG. 7, eight light emitting diode arrays 10 (8 units) are arranged in two rows in the longitudinal direction (left and right direction) of the substrate and in the short side direction. When the light emitting diodes 12 are connected in four stages (up and down), a total of 40 light emitting diodes 12 are arranged at equal intervals. be able to. In particular, the spacing x of the light emitting diodes 12 between the connected units is
It is kept the same as the distance x from the others.

In this case, each connector is
Since wires are connected so that they are connected in parallel to the power supply, if connectors are arranged so that at least one circuit wiring of each unit is connected, it is not necessary to attach connectors at other positions, reducing costs. Can be planned. Note that all connectors may be attached in consideration of strength, reliability, and the like.

As described above, according to the high-mount stop lamp of this embodiment, the light-emitting diode array 10 having the minimum configuration in which a plurality of, for example, five, light-emitting diodes 12 are arranged in a line at equal intervals is defined as one unit. By connecting, coupling and arranging a plurality of in the width direction (left or right or up and down direction of the drawing), light emitting devices of various sizes can be configured and accommodated in a case of a high mount stop lamp of a corresponding size. Accordingly, when the light emitting device is one component of the high-mount stop lamp, components can be shared and components can be standardized, so that total costs such as design costs and manufacturing costs can be reduced.

The present invention is not limited only to the above embodiment. In the above-described embodiment, an example of application to the high-mount stop lamp 1 has been described. However, the invention can be applied to, for example, a tail lamp of a vehicle, a backlight of a liquid crystal display device, and the like.

[0030]

As described above, according to the present invention, a plurality of substrates on which a plurality of light-emitting diodes are arranged at equal intervals are connected in combination in a direction in which the light-emitting diodes are arranged or in a direction orthogonal to the direction in which the light-emitting diodes are arranged. By making it possible,
If one light-emitting diode array having the minimum configuration is designed and manufactured, it can be applied to light-emitting devices of various sizes in combination, so that components can be shared and standardized from the viewpoint of the light-emitting device, and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a high-mount stop lamp according to one embodiment of the present invention is mounted on a vehicle.

FIG. 2 is a diagram showing a schematic configuration of a high-mount stop lamp of FIG. 1;

FIG. 3 is a diagram showing a configuration of a light emitting diode array as one component of a high-mount stop lamp.

FIG. 4 is a diagram illustrating a circuit configuration of the light emitting diode array of FIG. 3;

FIG. 5 is a diagram showing a state in which two light emitting diode array units are linearly coupled.

FIG. 6 is a diagram showing a state in which four light emitting diode array units are coupled in a plane direction.

FIG. 7 is a diagram showing a state in which units of eight light emitting diode arrays are coupled in a line direction and a plane direction.

[Explanation of symbols]

1: High mount stop lamp, 3: Rear glass, 5
... Case, 10 ... Light emitting diode array, 11 ... Circuit board, 12 ... Light emitting diode, 15 ... Resistance, 16a, 17
a: Male connector, 16b, 17b: Female connector.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yuji Agatsuma 5-2-1 Asahicho, Imabari-shi, Ehime Harrison Toshiba Lighting Co., Ltd. F-term (reference) 3K039 AA01 LB08 LC06 LD06 MB04 3K080 AA01 BA07 BE07 BE10 CC17 5C096 AA27 BA04 CA06 CC06 FA19

Claims (5)

[Claims] 1. A plurality of light emitting diodes arranged at equal intervals on a surface of a substrate and connected in series to a power supply; and the substrate is mounted on at least one end of the substrate in a light emitting diode arrangement direction. A light-emitting diode array comprising: a substrate connecting portion provided so as to maintain a space between the light-emitting diodes when connecting and connecting a plurality of light-emitting diodes. 2. A plurality of light emitting diodes arranged at equal intervals on a surface of a substrate and connected in series to a power supply; and at least one end in a direction orthogonal to the arrangement direction of the light emitting diodes on the substrate. And a substrate connecting portion provided so as to keep a distance between the light emitting diodes when connecting and connecting a plurality of the substrates. 3. The light-emitting diode array according to claim 1, wherein said substrate connecting portion is formed at an end of said substrate so as to engage with an opposite end of said substrate. A light emitting diode array, comprising: a mating portion; and a connector mounted on the engaging portion so as to connect circuit wiring of its own substrate to circuit wiring of another substrate in parallel. 4. The light-emitting diode array according to claim 1, further comprising a heat radiating means attached to the back surface of the substrate directly so as to avoid the substrate connecting portion or through an insulating member. A light-emitting diode array, comprising: 5. A plurality of light-emitting device containers set for each light-emitting device; and one or more light-emitting device containers are combined and accommodated in each of the light-emitting device types.
And a light-emitting diode array according to any one of the preceding claims.