JPH0328473Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a bendable rod-shaped light-emitting display body suitable for use in decorative lights for displays, neon signs, and the like.

(Prior Art) Conventionally, when producing neon signs and the like, neon tubes have been heated and bent. However, this bending process is troublesome and requires skill, and the lifespan of neon tubes is only a few thousand hours, which poses problems in terms of maintenance.

In view of these circumstances, the present applicant has already proposed various bendable rod-shaped light-emitting displays using light-emitting elements such as solid-state lamps in which semiconductor chips are sealed with resin. One of them is shown in FIG. 9, and this rod-shaped light emitting display consists of many light emitting elements
The terminals 101a and 102b of 00 are connected in parallel to conductive wires 102a and 102b coated with insulation, and the conductive wires 102a and 102b are twisted between the light emitting element 100, and the whole is connected to the flexible envelope 103. It is said to have a structure encapsulated by

In the rod-shaped light-emitting display with this structure, the envelope 103 is flexible, and the light-emitting element 100 is located approximately on the center line of the flexible envelope 103 (in other words, approximately on the center line of the rod-shaped light-emitting display). , and conductive wire 1
Since the wires 02a and 102b are twisted together and positioned approximately on the center line, it has the advantage that it can be bent in any direction and shape, but on the other hand, it has the following problems.

(Problems to be Solved by the Invention) In other words, such a rod-shaped light-emitting display has a wiring configuration in which a large number of light-emitting elements 100 are connected in parallel as shown in the circuit diagram of FIG. The structure is based on a power supply means, and the forward equivalent internal electrical resistance r of the light emitting element 100 is low, so the same electro-optical characteristics can be achieved due to the influence of the electrical resistance r of the conductive wires 102a and 102b. Even if such light emitting elements are used, there is a problem that the current flowing through each light emitting element 100 is different, and as a result, the brightness of each light emitting element 100 is different.

In other words, when power is supplied from one end of the rod-shaped light-emitting display element as shown in FIG. As shown in Figure B, one end of the light emitting display body is an anode,
When power is supplied using the other end as a cathode, the light emitting display body 100 near both ends lights up brightly, and the brightness decreases as it approaches the center.

Further, since such a rod-shaped light emitting display is an elastic body, it hardly causes any permanent deformation when bent, and even if it is bent, it is difficult to maintain the bent shape. Therefore, as shown in FIG. 11, when manufacturing, for example, an S-shaped neon sign using the rod-shaped light-emitting display A, there are many Each part of the rod-shaped light emitting display A must be supported and fixed to the plate 105 (or a wall surface, etc.) using the supporting tools 104, and the fixing work using this large number of supporting tools 104 is quite troublesome.

Furthermore, the rod-shaped light emitting display as described above has problems in terms of manufacturing, since the manufacturing process includes troublesome steps such as twisting the conductive wires 102a and 102b.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a rod-shaped light-emitting display in which a large number of light-emitting elements are built into a flexible envelope whose light-emitting surface side is transparent. A conductive metal core material that holds the light emitting display body in an arbitrary bent shape through plastic deformation is provided approximately along the center line of the flexible envelope, and the conductive metal core material The gist is that the light-emitting elements are fixed at intervals, and the light-emitting elements are connected in series via conductive wires with the conductive metal core serving as one electrode.

(Functions and Effects) With such a configuration, the conductive metal core provided almost along the center line of the flexible envelope is plastically deformed by bending the rod-shaped light emitting display, and its permanent deformation is reduced. Since the rod-shaped light-emitting display is prevented from restoring, it becomes possible to maintain the rod-shaped light-emitting display in an arbitrary bent shape. Therefore, when manufacturing a neon sign or the like, the bent rod-shaped light-emitting display can be attached to a plate or the like using several supports, which greatly improves manufacturing efficiency.

Furthermore, since the conductive metal core material is used as one electrode of the light-emitting element, this one electrode can be taken out from any position on the rod-shaped light-emitting display, and it is also possible to return The amount of conductive wire used as a wire can be saved. And since the wiring work only requires connecting the light emitter elements in series with one conductive wire,
It is also possible to reduce the effort required for wiring during manufacturing.

In addition, since the light emitting element is fixed to this conductive metal core material and positioned in advance, it is possible to easily connect the light emitting element with conductive wires during manufacturing, and it is possible to easily connect the light emitting element with conductive wires. Since there is no need for a wire twisting process, etc., it is extremely advantageous in terms of manufacturing.

Moreover, when such light-emitting elements are connected in series, the same current flows through each light-emitting element regardless of the electrical resistance of the conductive wire, so that the brightness of each light-emitting element is constant; Since the current flowing through the conductive wire can be made small, it is also possible to make the diameter of the conductive wire extremely thin.

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

(Example) Fig. 1 is a perspective view showing an embodiment of a rod-shaped light emitting display according to the present invention, and Fig. 2 is a sectional view taken along the line - - in Fig. 1. A conductive metal core material 3 to which light emitting elements 2 are fixed at intervals is built in approximately along the center line of the envelope 1, and a plurality of light emitting elements 2 (in the illustrated example, three each) are formed into blocks. For each block, light emitting elements 2 are connected in series via conductive wires 4. A ring-shaped electrode 5 for feeding power to each block is provided on the outer periphery of the flexible envelope 1, and the light emitting element 2 at one end of each block is connected to the electrode 5 via a conductive wire 4.
At the same time, the light emitting elements 2 at the other end of each block are respectively connected to a conductive metal core 3 via conductive wires.

The flexible envelope 1 is a translucent rod-shaped envelope made of, for example, soft polyvinyl chloride resin, acrylic resin, polyethylene resin, polycarbonate resin, silicone rubber, etc. 15mm
The flexible envelope 1 is assumed to have a diameter of about 100 mL, and is constructed to be entirely translucent, and preferably to enhance light diffusivity by adding a light diffusing agent or the like. However, it is not essential that the flexible envelope has such a configuration, and it is sufficient that at least the light-emitting surface side is transparent, and in some cases,
As shown in FIG. 3, it is also possible to have a composite structure in which the outside is further covered with a light-transmitting flexible tube 11, or a hollow structure with only the flexible tube 11.

The conductive metal core material 3 provided almost along the center line of the flexible envelope 1 is plastically deformed when the rod-shaped light-emitting display is bent, and its permanent deformation allows the light-emitting display to be freely adjusted. It has both the role of maintaining the bent shape of the light emitting element 1 and the role of one electrode for energizing the light emitting element 1. For example, a single wire of copper or aluminum having a diameter of about 0.8 to 1.5 mm is preferably used. used.

In this case, it goes without saying that the shape retention force of the conductive metal core material 3 after plastic deformation must be at least greater than the elastic restoring force of the flexible envelope 1 during bending. The light emitting element 2 fixed to the conductive metal core 3 is made of, for example, gallium arsenide (GaAs), gallium phosphorus (GaP), gallium aluminum arsenide (GaAlAs), as shown in FIG.
A semiconductor chip 21 such as a well-known light emitting diode is sealed with a translucent thermosetting resin 22, and includes a terminal (for example, a cathode side terminal) 23 that supports the semiconductor chip 21, and a bonding wire 2.
Terminals (for example, anode side terminals) 23' connected to the semiconductor chip 21 via 4 protrude from both sides.

Such light-emitting elements 2 are fixed to a conductive metal core 3 at regular intervals by means such as soldering, and are connected in series in groups of multiple blocks. That is, the different poles 23, 23' of the adjacent light emitting elements 2, 2 of each block are connected by a conductive wire 4 wound around a conductive metal core 3, and the light emitting elements 2 at one end of each block are connected by a conductive wire 4 wound around a conductive metal core 3. is connected to a ring-shaped electrode 5 via a conductive wire 4, and the light emitting element 2 at the other end is connected via a conductive wire 4 to the conductive metal core 3, which serves as a common electrode. Therefore, in this embodiment, the wiring state is as shown in FIG. 5. The conductive wire 4 has a current of 0.2 to 0.6, for example, since the current is small in such a series connection state.
An extremely thin single copper or aluminum wire or the like having a diameter of about mm is used.

The rod-shaped light-emitting display with the above structure has a conductive metal core 3 that imparts shape retention through plastic deformation along the center line of the flexible envelope 1, so it can be folded as desired. It is possible to maintain the shape in a curved shape. Therefore, when bending this rod-shaped light emitting display body X to make an S-shaped neon sign, as shown in FIG. 7, several pieces are required. Since the supporting tool 6 allows it to be attached to the plate 7 or the like without losing its shape, work efficiency is greatly improved.

In addition, in the rod-shaped light-emitting display of this embodiment, the light-emitting elements 2 are connected in series for each block, and a ring-shaped electrode 5 for power supply is connected for each block.
For example, as shown in Figure 8,
When installing this rod-shaped light emitting display X as an eye catcher etc. around a signboard 8, using a support 6' having an electrode connected to a power supply line on the inner surface,
By attaching each ring-shaped electrode 5 of the rod-shaped light emitting display X, it is extremely convenient because there is no need to connect the power supply line to each ring-shaped electrode 5 one by one, and the power supply can be controlled in various ways. By making this change, it becomes possible to perform a variety of light reduction operations, such as alternately reducing the light on each block as shown in the same figure, or sequentially moving blocks that turn on or off. Moreover, since the light-emitting elements 2 of each block are connected in series, the brightness of each light-emitting element 2 within the block is constant, resulting in extremely good visibility.

Furthermore, if the light-emitting element 2 is fixed to the conductive metal core 3 and positioned in advance as in this rod-shaped light-emitting display, the work of connecting the light-emitting element 2 using the conductive wire 4 during manufacturing is facilitated. Furthermore, the troublesome process of twisting conductive wires, etc., which is required in the previous rod-shaped light emitting display shown in FIG. 9, is not required, so that it can be manufactured extremely advantageously.

Although a preferred embodiment of the present invention has been described above in detail, the present invention is not limited to this embodiment. For example, as shown in FIG. Various modifications can be made, such as a configuration in which the last light-emitting display body 2 is connected in series through a conductive metal core 3 serving as one electrode.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view of another embodiment of the invention, and Fig. 4 is a light emitting element. 5 is an electrical circuit diagram of the embodiment shown in FIG. 1,
FIG. 6 is an electric circuit diagram of still another embodiment of the present invention,
Figures 7 and 8 are explanatory diagrams of one usage state of the present invention, Figure 9 is a perspective view of the preceding example, Figures 10 A and B are electrical circuit diagrams of the preceding example, and Figure 11 is the preceding example. FIG. 2 is an explanatory diagram of one state of use. 1...Flexible envelope, 2...Light emitter element, 3...
Conductive metal core material, 4... conductive wire, 5... ring-shaped electrode.

Claims (1)

[Scope of utility model registration request] A rod-shaped light-emitting display body in which a large number of light-emitting elements are housed in a flexible envelope whose light-emitting surface side is transparent, and the light-emitting display body is held in an arbitrary bent shape by plastic deformation. A conductive metal core is provided approximately along the center line of the flexible envelope, the light emitting elements are fixed to the conductive metal core at intervals, and the conductive metal core is attached to one side. A rod-shaped light-emitting display comprising the light-emitting elements as electrodes connected in series through conductive wires.