JP5490279B2 - Flexible light emitter - Google Patents

Description

  The present invention relates to a lighting or display device technology using a light-emitting diode, and in particular, can reduce power consumption, has a long life, and can be used in any place regardless of the space in which lighting is arranged. It can be done.

Conventionally, a light emitting diode (LED) is used as a light source for illumination instead of a light bulb or the like.
Since this light emitting diode has low power consumption and long life, it is used as a light source for various illuminations or as a light source for display such as a traffic light.
In recent years, blue LEDs have been developed and spread, and are used as light sources for various illuminations and bulletin boards using three primary colors of red, blue, and green.

A light source for illumination and display in which a plurality of these light emitting diodes are arranged and coated with a resin has been proposed.
As an example of this, for example, a light emitting chip is mounted on a flexible wiring board, and the light emitting chip and the flexible wiring board are sealed with a resin having flexibility and translucency (for example, Patent Document 1).
Moreover, between the installation location of one LED chip and the installation location of another LED chip installed in the arrangement portion for arranging a plurality of LED chips, for deflecting the arrangement portion while avoiding the installation location The thing which formed the notch part etc. is also proposed. (For example, prior literature 2).

JP 9-50253 A JP-A-2004-103993

However, since the above-mentioned conventional luminous body has a light emitting diode attached to the center of one side of the substrate, it takes up an arrangement area corresponding to the area of the substrate, and can be efficiently arranged in a small space. However, there was a problem that the use and place where it could be used were limited.
Further, conventionally, since the resin to be molded used is a semi-transparent material, there is a problem that the light transmission is bad and the luminance is lowered.
In addition, when a light emitting element is arranged at the center of the substrate to emit light from one surface as in the conventional case, the thickness of the resin on the light emitting element depends on the thickness of the resin to be molded. For this reason, even if the thickness of the resin is reduced more than necessary and the translucency is further increased, there is a limit due to the strength of the mold.

  Further, when trying to adjust the length of the light emitter in accordance with the place to be arranged, it has been necessary in the past to make a light emitter having a length corresponding to the space in advance. For this reason, when the light emitter is mounted on the spot or the like, it cannot be adjusted even if it is intended to have a desired length on the spot.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a flexible light-emitting body that is flexible, suppresses power consumption, has a long life, and can be miniaturized.

  In order to achieve the above object, a flexible luminous body according to one aspect of the present invention is a luminous body in which a light emitting element is arranged on a flexible substrate provided with wiring and molded into a plate shape with a soft resin, The light emitting elements are arranged in a row at a predetermined interval on one end side of the flexible substrate, and are arranged so as to have directivity in the thickness direction of the plate-shaped mold resin.

  As a result, the illuminant emits light from the end side, so that the substrate is placed upright when it is placed, so it can be reduced in size without being limited by the area of the substrate, and it can be efficiently used in a narrow place regardless of space etc. Can be used.

  The resin may be made of a transparent urethane resin. Thus, by using a urethane resin, it does not emit volatile matter, and particularly has excellent adhesive strength and waterproofness. Therefore, it can be molded while maintaining the properties and performance of the substrate, and the luminance can be increased. The resin is not limited to the urethane resin, and may be silicon.

Alternatively, one unit may be configured by combining several light emitters, and electrode fittings may be arranged between the units so that the electrode fittings can be cut.
The electrode fitting may be formed with a hole for attaching a wiring cord for connection to an external electrode. Thereby, a light emitter having a desired length can be obtained. Further, the cut metal fitting can be used as a metal fitting for connecting to the external electrode, so that work efficiency can be improved.
The light-emitting element may be a side-view type issuing element.

According to the present invention, it is possible to provide a lighting or display device that is flexible, has low power consumption, has a long lifetime, and is miniaturized.
As a result, it can be easily applied to all lighting, and the structural, spatial, and visual effects can be maximized.

The disassembled perspective view of the light-emitting body concerning this embodiment. The side view of the light-emitting body concerning this embodiment. The rear view of the light-emitting body concerning this embodiment. The figure which showed the connection of the light emitting element typically. The disassembled perspective view of the light-emitting body concerning another embodiment.

Hereinafter, the present invention will be described with reference to an example in which the present invention is applied to a light emitter.
FIG. 1 is a perspective view of a flexible light emitter according to the present embodiment. 1 and 2, the light emitter has a substrate 1, a light emitter 2 attached on the substrate 1, and a soft resin portion 6 for molding the substrate 1 and the light emitter 2.

The substrate 1 is a flexible substrate composed of FPC (= Flexible Printed Circuits) and is formed in a thin plate shape.
On the substrate 1, the light emitting elements 2 are arranged in a line at substantially equal intervals along the upper end portion of the substrate 1 on the side surface in the drawing. Thereby, as shown in FIG. 2, the light emitting elements 2 are arranged in a line on the side surface side (one end side) of the substrate 1. In this example, the light-emitting element 2 uses a side-view type element made of gallium nitride (GaN), and has a directivity in the thickness direction (upward in the figure) of the mold resin when energized. LED.
The emission color is not limited to white, and may be a blue light emitting diode, for example.

In addition, the light emitting element 2 constitutes a set of three units, and two electrode fittings 5 are vertically attached to the boundary of each unit. The upper electrode fitting 5 is electrically connected to the plus electrode side, and the lower electrode fitting 5 is electrically connected to the minus electrode side.
The electrode fitting 5 is formed in a thin plate shape by a conductor such as copper. The electrode fitting 5 is formed with two through holes on the left and right sides of the figure, and is configured to allow wiring from an external power source. Then, by cutting the electrode fitting 5 from the broken line portion shown in the drawing with a cutting tool such as scissors or pliers, a light emitter having a desired length can be obtained. For example, it is possible to obtain a desired length such as 1 m 50 cm or 80 cm by cutting the 2 m light emitting body 1 from the middle.

In addition, wirings 4 and 9 for electrically connecting the light emitting element 2 are provided on both surfaces of the substrate 1. The wirings 4 and 9 can be formed by copper thin film printing.
As shown in FIG. 2, the wiring 4 is printed on one side (for example, + pole) on the side surface side so that the light emitting elements 2 are connected in series. The other pole (for example, the negative pole) is wired by the wiring 9.
Each light emitting element 2 and the wiring 4 are electrically connected by solder 3.
Further, in this example, since three light emitting elements 2 are assumed as a set of units, the wiring 4 is formed so as to connect the light emitting elements 2 at both ends in one unit.
Thereby, as shown in FIG. 4, each light emitting element 2 is in the state connected in series.
Further, as shown in FIG. 3, a resistor 10 is connected between the light emitting elements 2 on the back surface.

  In addition, an electrode fitting 5 is connected to the end of the wiring 4, and wiring cords 7 and 8 extending from the electrode fitting at the end of the substrate 1 to an external power source are connected. Energized.

The resin portion 6 for molding the substrate 1 is formed so as to cover the side surface side and the back surface side of the substrate 1.
The resin portion 6 is formed of a transparent soft urethane resin. Therefore, the resin part 6 itself has a gloss and is excellent in flexibility, chemical resistance, and waterproofness. Since the resin portion 6 completely covers the substrate 1, the width is larger than that of the substrate 1 as shown in FIGS. 2 and 3.

  In the case of using the light emitter configured as described above, the wiring cords 7 and 8 are energized with the external DC power supply connected (DC 12 V, 20 mA in this example), thereby emitting light via the wirings 4 and 9. When the element 2 is energized, the light emitting element 2 emits light, and the emitted light passes through the upper end portion of the resin portion 6 and functions as an illumination or display body. At this time, the light emitter has directivity in the thickness direction (upward in the drawing) of the plate-like substrate 1 and the resin 6, and in this example, the light diffusion angle of the light emitting element 2 is 120 degrees. In addition, the thickness of the resin on the light emitter 2 is only the thickness of the resin on the side surface, and does not depend on the resin thickness on the substrate 1.

Next, the manufacturing method of the said light-emitting body is demonstrated.
First, the wirings 4 and 9 are printed on the substrate 1 to which the power supply metal fitting 5 is attached at a predetermined interval.
Then, the light emitting element 2 is attached at a predetermined interval, and the light emitting element 2 and the wiring 4 are soldered and connected. Then, the wiring cords 7 and 8 are attached to the electrode fitting 5 at the end of the substrate 1. By energizing the wiring cords 7 and 8 in this state, the connection state can be checked based on whether or not the light emitting element 2 emits light.

Next, a mold resin is poured into a silicon mold that has been previously coated with an atypical agent to remove bubbles. Cured at 70-80 ° C. and taken out.
The illuminant in which the lighting of the light emitting element 2 is confirmed is subjected to natural drying in order to evaporate the components attached to the surface after performing a battlefield with an ultrasonic cleaning machine.

Then, the cut pressing jigs are inserted into 2 to 3 places at a pitch of 10 mm, and the coating height is shaped to be constant.
After molding, inject the defoamed resin while maintaining the level, defoam again (maintain for 1 minute after 760mHg), remove the silicon burrs while keeping the mold surface level, and cover with a burner The surface is finished, dried and cured to finish.

Thus, according to the above-described embodiment, since the substrate 1 is molded with the resin 6, it is flexible, suppresses power consumption, has a long life, and can be downsized. In addition, the light emitting elements 2 are arranged in one row at one end on the substrate 1 and arranged so that the light emitting elements 2 have directivity in the thickness direction of the resin 6. In the case of mounting, the width on the light emitting surface side can be reduced compared with the case where the light emitting element 2 is arranged at the center in the width direction on the upper surface side of the conventional substrate 1, and the light emitting diode can be used for small illumination or A display device can be provided.
In addition, since the issuing elements 2 are arranged in a row on the part side (width direction) of the substrate 1 and the resin 6 and have directivity in the width direction, the arrangement interval of the light emitters can be shortened. It can be easily applied to all kinds of lighting, and the degree of structural, spatial and visual freedom is increased, and the effect can be maximized.

In addition, since several light emitting elements 2 are combined into one unit to constitute one unit, and the electrode fitting 5 is arranged between each unit so that the electrode fitting 5 can be cut off, By cutting at the electrode fitting 5, a light emitter having a desired length can be easily obtained.
In addition, since the electrode fitting 5 is formed with a through hole for attaching a wiring cord for connecting to an external electrode, the electrode fitting 5 can be easily cut and wiring is made at the cut portion. It becomes easy to perform wiring.

In the above-described embodiment, an example in which the substrate 1 is molded with the resin 6 has been described. However, the present invention is not limited to this, and the substrate 1 is inserted into a hollow tube-shaped resin. The substrate 1 may be covered with resin by sealing the opening.
An example of this is shown in FIG. In addition, about the structure same as the above-mentioned embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
In FIG. 5, the resin tube 60 is formed in a hollow shape, and a through hole is formed therein. This through hole is formed slightly wider than the width of the substrate 1. In the illustrated example, the hollow portion of the resin tube 60 has a square cross section (in the illustrated example, a rectangle), but may have a circular cross section or an elliptical shape, and the shape is arbitrary.
Further, openings 60a and 60b are formed at both ends of the resin tube 60, and the substrate 1 is inserted into the through hole of the resin tube 60 through one of the openings (60b in the illustrated example). Is covered with a resin tube. In this state, when the substrate 1 is inserted into the resin tube 60, the openings 60a and 60b are sealed by welding or adhesion, so that the substrate 1 is covered and sealed by the resin tube 60. .

The resin tube 60 is made of resin such as silicon and has excellent flexibility.
In addition, even if the resin tube 60 does not have openings at both ends, the opening (60a) of the part is once formed in a bag shape that is closed in advance, and the substrate 1 is inserted from the opening 60b of the other end. The opening 60b may be sealed by welding or bonding.

  Thus, according to this other embodiment, since the substrate 1 can be covered with the resin simply by inserting the substrate 1 into the resin tube 60, the amount of resin is reduced as compared with the case of molding, If the tube 60 is prepared, the manufacturing process is simplified.

DESCRIPTION OF SYMBOLS 1 Board | substrate 2 Light emitting element 4 Wiring 5 Electrode metal fitting 6 Mold part 60 Resin tube

Claims (1)

A light emitting element in which a light emitting element is disposed at a predetermined interval on one surface side of a flexible substrate provided with wiring, and the flexible substrate is inserted into a hollow tube-shaped soft resin,
In the flexible substrate, a plurality of one unit having a set of several light emitting elements are arranged,
For each unit, the flexible substrate is provided with wiring for electrically connecting the light emitting elements on both sides, and with a through hole for electrically connecting wiring provided on the both surfaces,
Between unit of the flexible substrate, electrically connected to Rutotomoni, the cleavable electrode in the width direction is provided between the units,
When the unit is cut, positive and negative electrodes that can be wired from the cut part are formed between the cut units on the one surface side where the light emitting element of the flexible substrate is arranged.
A flexible luminous body characterized by that.

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