JPH06314071A - Led module - Google Patents

Abstract

PURPOSE:To reduce cost and to facilitate exchange in substrate units by automatizing the mounting of an LED in an LED module. CONSTITUTION:The LED module 10 is principally constituted of an LED substrate 12 on which plural LEDs 11 are mounted in a matrix state, a control circuit substrate 14 on which various kinds of circuit parts 13 are packaged, a connector member 15, and a holding member 16. The LED substrate 12 and the control circuit substrate 14 are electrically connected through the connector member 15. Thus, the mounting of the LED is performed only to the LED substrate simple substance and automatized, and the attachment/detachment and the exchange of the substrate ae facilitated. Since space for the wiring and the electrode pattern of the LED substrate is small, an interval between the LEDs and the space other than an LED display surface are kept to a minimum on the LED substrate. Therefore, the large LED display surface of fine appearance is formed by arranging many LED modules.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED module in which a plurality of LEDs (light emitting diodes) are mounted in a matrix.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 (a) and 4 (b), a front view and a side view, a plurality of LEDs are mounted in a matrix at a predetermined pitch to display characters and figures. A module (LED display element having a basic unit configuration) is known.

[0003]

When a large number of the above-mentioned LED modules are arranged and used, in order to improve the appearance, the LEDs are mounted at a high density without changing the pitch.
The outer dimensions of the LED substrate cannot be made larger than the LED display surface because the ED display surfaces must be adjacent to each other. Also, L
Since it is necessary to pass a predetermined current to each LED of the ED module, a fine circuit pattern cannot be used. For these reasons, in the LED module, the electrical connection between the LED board on which each LED is mounted and the control circuit board for driving each LED is achieved by directly using the terminals of the LED. Therefore, the mounting and assembling of the LED are expensive and difficult to automate. Further, the electrical connection between the LED board and the control circuit board is soldering of the terminals of the LED, so if a defect occurs after assembly, the LED
It was not possible to replace the board or control circuit board unit.

The present invention has been made to solve the above problems, and an object of the present invention is to facilitate cost reduction and easy replacement of substrate units by automating the mounting of LEDs in an LED module. Is.

[0005]

The structure of the invention for solving the above-mentioned problems is an LED module for displaying characters, figures, etc. on an LED display surface in which a plurality of LEDs are arranged in a matrix at a predetermined pitch. An LED board on which the LED is mounted; a control circuit board for driving the LED corresponding to the LED board; and a metal conductor and an insulating member disposed between the LED board and the control circuit board. Holding for holding the connector member made of a material and the LED board and the control circuit board at a predetermined interval to bring the connector member into a pressure contact state and electrically connecting the opposing electrodes or land patterns of the both boards. And a member.

[0006]

According to the above means, the LED board and the control circuit board are sandwiched by the holding member and electrically connected to each other through the connector member. Therefore, the LED is mounted only on the LED substrate alone, and the LED substrate and the control circuit substrate can be easily attached and detached. Moreover, the wiring / electrode pattern space required for electrical connection between the LED substrate and the control circuit substrate can be reduced. Therefore, the LED substrate can minimize the gap between the LEDs and the space other than the LED display surface.

[0007]

EXAMPLES The present invention will be described below based on specific examples. FIG. 1 is an exploded perspective view showing the configuration of an LED module according to the present invention, and FIG. 2 is a perspective view of the LED substrate of FIG. 1 seen from the back side. The LED module 10 is mainly composed of a plurality of LEDs 11 mounted in an L-shape.
An ED board 12, a control circuit board 14 on which various circuit components 13 are mounted, a connector member 15, and a holding member 16. On the rear surface side of the LED substrate 12 on which the LEDs 11 are arranged, a circuit pattern for passing a current between the anodes / cathodes and electrode patterns 12a are formed by collecting the circuit patterns at predetermined positions (FIG. 2). reference).
Further, the control circuit board 14 has an electrode pattern 14a at a position facing the electrode pattern 12a of the LED board 12.
Are formed. A connector member 15 having a predetermined thickness and width is arranged between the electrode pattern 12a of the LED board 12 and the electrode pattern 14a of the control circuit board 14. As the connector member 15, an insulating material made of elastic silicon rubber and a metal conductor made of thin metal wires are integrally molded, and are electrically conductive in a single direction perpendicular to the LED board 12 and the control circuit board 14. What you have is adopted. That is, the electrode patterns 12a and 14a are electrically connected via the metal conductor of the connector member 15. The holding member 16 is assembled using the cutouts 12b of the LED board 12 and the cutouts 14b of the control circuit board 14, which are provided in plural at appropriate places. The LED board 12 and the control circuit board 14 are sandwiched by the holding member 16 at a predetermined interval, and the connector member 15 is brought into an appropriate pressure contact state with both boards 12 and 14 to maintain electrical connection.

As described above, the LED board 12 and the control circuit board 14 are electrically connected using the connector member 15. Therefore, the LED module of the present invention can be easily automated because the LED 11 only needs to be mounted on the LED board 12, and the LED board and the control circuit board can be easily fixed and the electrical reliability is improved. or,
The LED board 12 and the control circuit board 14 are connector members 1
Because of the connection by 5, it is detachable, and maintenance such as substrate replacement is extremely easy. The LED may be a surface mount type, and in this case, an electrode pattern is formed on the back surface side of the LED substrate 12 by a through hole.

In addition to the above, the connector member 15 uses an insulating material made of elastic silicone rubber 17 as a core material,
The same effect can be obtained by using a metal conductor of an FPC (Flexible Printed Circuit Board) 18 wrapped around the metal conductor as shown in FIG.

Further, in a full-color (R, G, B) LED (electrode 4 terminals) or the like in which high density LED electrodes are present, an electrode pattern (connecting pattern) is provided on the rear surface side of the LED substrate 12 with no space. It will be difficult to provide. In such a case, as shown in FIG. 3, the connector member 15 is an anisotropic conductive sheet in which metal conductors made of thin metal wires are arranged in a matrix in the thickness direction of an insulating material made of a silicon rubber sheet having elasticity. ′
Can be adopted. That is, the electrode pattern 12a of the LED board 12 and the electrode pattern 14a of the control circuit board 14 are opposed to each other, and the connector member 15 'is disposed therebetween. Similar to the above-mentioned embodiment, the holding member 16 'is assembled by utilizing the notches 12b, 14b provided in plural places in the LED board 12 and the control circuit board 14. As a result, the holding member 16 ′ has the LED board 12 and the control circuit board 1
4 and 4 are sandwiched at a predetermined interval, and the connector member 15 'is brought into pressure contact with both substrates 12 and 14 to properly maintain the electrical connection.

Such a connector member 15 'includes a full-color LED in which the electrodes of the LED are present at an extremely high density, in which it is difficult to provide an electrode pattern (connecting pattern), and the LED is statically formed in dot units. It is also effective for things that drive to. That is, the connector member 15 'is applied in the case where the number of electrodes increases and the electrode pattern cannot be physically formed at a high density. As a result, the soldered portion of the LED and the electrode pattern of the control circuit board are directly connected.

[0012]

As described above, since the LED board and the control circuit board are sandwiched by the holding members and electrically connected to each other through the connector member, the LED only needs to be mounted on the LED board as a single unit. Cost reduction is possible. Also, since the electrical connection between the LED board and the control circuit board is made by the connector member, the boards can be easily attached and detached and exchanged. Furthermore, since the wiring / electrode pattern space required for electrical connection between the LED board and the control circuit board is small, the space other than the LED display surface of the LED board and L
The gap between the EDs can be minimized. This makes it possible to arrange a large number of LED modules to form a large-sized LED display surface that looks good.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of an LED module according to a specific embodiment of the present invention.

FIG. 2 is a perspective view of the LED substrate of FIG. 1 viewed from the back surface side.

FIG. 3 is a perspective view showing another embodiment of the configuration of the LED module according to the present invention.

FIG. 4 is an external view showing a conventional LED module.

FIG. 5 is an external view showing a connector member using an FPC.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... LED module 11 ... LED 12 ... LED board 12a ... Electrode pattern 12b ... Notch part 13 ... Circuit part 14 ... Control circuit board 14a ... Electrode pattern 14b ... Notch part 15 ... Connector member 16 ... Holding member 17 ... Silicon rubber 18 ... FPC (flexible printed circuit board)

Claims (1)

[Claims] 1. An LED module that displays characters, figures, and the like on an LED display surface in which a plurality of LEDs are arranged in a matrix at a predetermined pitch, and corresponds to an LED substrate on which the LEDs are mounted and the LED substrate. And a control circuit board for driving the LED, and arranged between the LED board and the control circuit board,
A connector member made of a metal conductor and an insulating material and the LED board and the control circuit board are sandwiched at a predetermined distance to bring the connector member into a pressure contact state, and electrically connect between opposing electrodes or land patterns of both boards. An LED module comprising a holding member connected to the LED module.