JPH0337192B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a bendable light-emitting display body that can be suitably used for display decorative lights, neon signs, and the like.

(Prior Art) As one of this type of light emitting display, the present applicant has already proposed one manufactured as shown in FIG. 6 (Utility Application No. 166368/1982).

That is, this light emitting display is made by twisting together a plurality of conductive wires 101a covered with an insulating film to form a core wire portion 101.
At the same time, a plurality of conductive wires 102a covered with an insulating coating are spirally wound around the core wire portion 101, and both terminals 1031, 103 of a large number of solid state lamps 103 in which semiconductor chips are encapsulated are formed.
2 to conductive wire 101a and conductive wire 102a, respectively.
It has a structure in which the entire body is covered with a light-transmitting flexible envelope 104.

A light-emitting display body having such a structure has a core portion 101
The core conductive wires 101a forming the core conductive wires 101a are twisted together, and the conductive wires 102a are spirally wound around the outer periphery of the core conductive wires 101a, which has the advantage of being easily bent in any direction and shape. I had a problem like this.

(Problems to be Solved by the Invention) That is, one problem is that when manufacturing the above-mentioned light emitting display, the conductive wires 101a are twisted together and the conductive wires 102a are wound around the outer circumference of the solid-state lamp 10.
Since the terminals 1031 and 1032 of No. 3 must be connected, the connection work is additionally troublesome;
It is difficult to manufacture efficiently.

Another problem is that since the solid-state lamp 103 is not located on the center line of the light-emitting display but is eccentric near the surface, stress is applied to the solid-state lamp 103 when the light-emitting display is bent, which tends to have an adverse effect. .

The present invention aims to provide an excellent light-emitting display that can solve these problems without impairing the advantages of the light-emitting display and an efficient method for manufacturing the same.

(Means for Solving the Problems) That is, in the light emitting display of the present invention, a large number of solid chips encapsulating semiconductor chips are arranged in a row and connected to a plurality of conductive wires, and the conductive wires are connected to the solid state. The gist is that the lamps are twisted together and housed together with the solid lamp in a flexible envelope whose light-emitting surface side is transparent. a step of connecting a large number of solid-state lamps to a plurality of conductive wires in a row; a step of twisting the conductive wires between the solid-state lamps; and a step of twisting the twisted conductive wires together with the solid-state lamps at least on the light emitting surface. The gist of the method is to include the step of enclosing it with a flexible enveloping body whose side is translucent.

(Functions and Effects) If the light-emitting display body has such a configuration, both the solid lamp and the twisted portion of the conductive wires will be located approximately on the center line of the flexible envelope (in other words, on the center line of the light-emitting display body). Therefore, stress when bending the light emitting display is less likely to be applied to the solid lamp, and the twisted portion of the conductive wires can be easily bent in any direction. Therefore, reliability is improved when used for display decorative lights, neon signs, etc., and bending processing and the like can be performed freely. Moreover, the light emitted from the solid-state lamp on the center line is only slightly interrupted by the solid-state lamp connection part of the conductive wire.
around the flexible envelope except in the direction in which it is blocked.
Luminescent display is possible in any direction in 360 degrees. Furthermore,
By adjusting the twisting of the conductive wires so that the solid-state lamp faces in a certain direction, and by covering only the light-emitting surface side with a flexible envelope that is translucent, it is possible to display light emission only in a certain direction. is also possible.

Furthermore, according to the manufacturing method of the present invention, which includes the above-mentioned connecting process, twisting process, and enveloping process, solid-state lamps can be connected by arranging a plurality of conductive wires in parallel in the first connecting process. The work is much easier than in the case of the conventional example, and the next twisting process only requires twisting the conductive wires between the solid lamps. This means that the effort is halved compared to those that require winding. Therefore, manufacturing efficiency is significantly improved compared to the conventional example, and mass production can be easily achieved. Moreover, there is no need to use special jigs or equipment in any process, and general-purpose jigs and equipment can suffice, so there are advantages such as no increase in equipment costs.

Hereinafter, the present invention will be explained in detail with reference to Examples.

(Example) FIG. 1 is a perspective view of an embodiment of the light emitting display of the present invention, and FIG.
1 is an enlarged cross-sectional view along the line, in which 1 indicates a solid lamp, 2a, 2b conductive wires, and 3 a flexible envelope.

As shown in FIG. 4, the solid-state lamp 1 includes a semiconductor chip 1 such as a well-known light emitting diode such as gallium arsenide (CaAs) or gallium phosphide (GaP).
1 is sealed in a translucent thermosetting resin 12, and includes a cathode side terminal 13a supporting the semiconductor chip 11, and an anode side terminal 13b connected to the semiconductor chip 11 via a bonding wire 14.
The structure is such that it protrudes outward.

A large number of these solid-state lamps 1 are arranged in a row as shown in FIG. 1, and as shown in FIGS.
The anode side terminals 13b are respectively connected to the anode side conductive wires 2b.

The conductive wires 2a and 2b are coated with an insulating coating, and the insulating coating is removed from the portion connecting the terminals 13a and 13b of the solid-state lamp 1, leaving them as bare wires.
For example, the terminals 13a and 13b can be connected by soldering or the like.
A connection is being made. And this conductive wire 2
a and 2b are twisted together once or several times in the middle of the solid lamp 1.

The conductive wires 2a and 2b twisted together in this way are
It is housed together with the solid-state lamp 1 in a light-transmitting flexible envelope 3, as shown in FIGS. 1 and 2, and is located approximately on the center line of the envelope 3. This flexible envelope 3
is a flexible rod-shaped body made of, for example, soft polyvinyl chloride resin, acrylic resin, polyethylene resin, polycarbonate resin, silicone rubber, etc., and has translucency as a whole, and is made of a light diffusing agent or the like. The light diffusion line is configured to have a light diffusion line.

As is clear from FIGS. 2A and 2B, in a light emitting display having such a structure, the solid lamp 1 also has a conductive wire 2.
Since the twisted portions a and 2b are located almost on the center line of the flexible envelope 3 (in other words, on the center line of the light emitting display), the stress when bending the light emitting display is applied to the solid lamp 1 and the conductor. It is difficult to bend the conductive wires 2a, 2b at the twisted portion, and the conductive wires 2a, 2b can be easily bent in any direction at the twisted portion. Therefore, reliability is improved when used for display decorative lights, neon signs, etc., and bending processing and the like can be performed freely.

Furthermore, the light emitted from the solid-state lamp 1 on the center line is
Since the conductive wires 2a and 2b are only slightly interrupted at the solid lamp connection portion, depending on the orientation of the solid lamp 1, the flexible envelope can be moved in any direction 360 degrees around the flexible envelope except for this interrupted direction. Luminescent display becomes possible. If the twisting of the conductive wires 2a and 2b is adjusted so that all the solid-state lamps 1 face in a certain direction as in this embodiment, a flexible structure with only one side on the light-emitting surface side being translucent can be created. By enclosing it with an enveloping body, it is also possible to perform a light emitting display only on one side.

The light-emitting display of the above embodiment has two conductive wires 2a, 2b built-in, but for example, as in the embodiment shown in FIG.
c is built into the flexible envelope 3, and a common cathode side conductive wire 2a and two anode side conductive wires 2b,
Terminals 13a and 13 of solid-state lamp 1 are connected to terminals 2c and 2c, respectively.
b may be connected. With this configuration, by conducting electricity between one of the two conductive wires 2b, 2c and the conductive wire 2a, the solid lamp 1 existing in the energized loop can be selectively lit. becomes possible. Note that, if necessary, four or more conductive wires may be incorporated to further increase the selection range of lighting operations.

In addition, as the flexible envelope, in addition to the envelope 3 made of a rod-shaped body made of soft synthetic resin as shown in this embodiment, a flexible envelope made of a tube made of soft synthetic resin as shown in the embodiment shown in FIG. It is also possible to adopt an envelope 3a, or an envelope 3b having a composite structure of a rod-shaped body 31b made of soft synthetic resin and a covering tube 32b, such as the embodiment shown in FIG. In the case of the envelope 3a, a heat-shrinkable tube can also be used. Furthermore, in order to perform light emitting display on only one side as described above, a flexible envelope may be used in which only one side is made of a translucent material.
In this case, it is better to use a light-reflecting material for the parts other than the transparent part.

Next, the manufacturing method of the present invention will be explained by taking as an example the case of manufacturing the light-emitting display shown in FIGS. 1 and 2. As shown in FIG. , 2b are arranged in parallel, and the solid-state lamps 1 are arranged in a row at intervals, and the terminals 13a,
13b is connected to the conductive wire. In this case, the solid lamp terminal connecting portions 21a, 2 of the conductive wires 2a, 2b
The insulating coating of 1b is removed in advance to form a bare wire, and the terminals 13a and 13b are solidly connected to this portion by means such as soldering.

As shown in FIG. Twisted once or several times. This twisting can be done manually or
It may also be done with a normal twisting device, but if the twisting is done too many times, the untwisted parts of the conductive wires on both sides of the solid lamp will tighten and press the solid lamp 1, so it is necessary to provide some margin. It is desirable that the direction of the solid-state lamp 1 be set in a desired direction by adjusting the number of times of twisting.

In the final wrapping step, the conductive wires with solid lamps twisted together in this manner are wrapped with a flexible wrapping body 3 as shown in FIG. 5C, thereby forming the intended light-emitting display. For example, when encapsulating with a thermosetting resin, a conductive wire with a solid lamp is set in a hollow mold that is split into two parts, a liquid resin is poured in, and the resin is heated and cured. It can be done by In addition, when using a heat-shrinkable tube 3a as shown in FIG. 3A as a flexible envelope, it is sufficient to insert a conductive wire into the tube 3a and heat it. In the case of forming a composite, a conductive wire may be inserted into the tube 3a, and then liquid resin may be poured into the tube 3a and then heated and solidified.

When the light emitting display of the present invention is manufactured as described above, the solid lamp 1 can be connected by arranging the plurality of conductive wires 2a and 2b in parallel in the first connection step.
The work of connecting the solid-state lamp 1 is much easier than in the conventional example. The next twisting process also requires simply twisting the conductive wires between the solid lamps, so it is less time-consuming than the conventional method that requires twisting the conductive wires and winding them in a spiral shape. It will be halved. Therefore, manufacturing efficiency is significantly improved compared to the conventional example, and mass production can be easily achieved.

Moreover, there is no need to use special jigs or equipment in any process, and general-purpose jigs and equipment can be used.
Effects such as no increase in equipment costs can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the light emitting display of the present invention, FIG. FIG. 4 is a sectional view of another embodiment of the light-emitting display of the present invention, FIG. 4 is a sectional view of a solid-state lamp, FIG. The figure is a perspective view of the light-emitting display body of the prior application. 1... Solid lamp, 2a, 2b, 2c... Conductive wire, 3, 3a... Flexible envelope, 13a, 13b...
...Terminal.

Claims (1)

[Scope of Claims] 1. A large number of solid-state lamps encapsulating semiconductor chips are arranged in a row and connected to a plurality of conductive wires, and the conductive wires are twisted between the solid-state lamps so that at least a light-emitting surface is formed together with the solid-state lamps. A bendable light-emitting display body built into a flexible envelope whose sides are translucent. 2. Connecting a large number of solid-state lamps encapsulating semiconductor chips to a plurality of conductive wires in a row, twisting the conductive wires between the solid-state lamps, and connecting the twisted conductive wires to the solid-state lamps. A method for producing a bendable light-emitting display comprising the step of encasing the lamp together with a flexible envelope whose light-emitting surface is transparent.