JP2001067910A - Illuminating lamp using light emitting element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating lamp wherein an illuminating direction has a directivity in a specified direction or is omnidirectional, and wherein light is observed as a natural color mixture even if the light is observed at a short distance. SOLUTION: In an illuminating lamp 1, a large number of directive light emitting elements 11 are disposed on a flexible printed substrate 10 and an illuminating direction has a diretivity in a specified direction or is omnidirectional according to a bending degree of the printed substrate 10. The illuminating direction has a directivity in a specified direction or omnidirections by using a large number of light emitting diodes in the illuminating lamp 1 even though the lamp 1 is formed in a small size. The illuminating lamp is observed as a natural color even if it is observed at a short distance, by assembling and using light emitting diodes having different emitting colors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating lamp using a large number of directional light-emitting elements, which is suitable for use as illumination for decoration or decoration of a bridge or a high-rise building.

[0002]

2. Description of the Related Art Lights installed outdoors include incandescent light bulbs,
Fluorescent lamps, inert gas discharge tubes, halogen lamps, electroluminescence and the like have been used. These illuminators have a light emitting surface that emits diffused light with a certain size, so in order to provide directivity so that the illuminator can be seen from a distance, condensing optics such as large condenser lenses and concave mirrors are required. I needed a system. In addition, since each lamp emits a single color, in order to create a wide variety of colors, the lamps of each color are combined and additively mixed. Therefore, when viewed from a short distance, each combined single color is seen as it is, and cannot be observed as a natural color mixture.

On the other hand, as a pilot lamp for electronic equipment, a photodiode (LE) having a small size and low power consumption is used.
D) and other semiconductor light-emitting elements have been widely used,
The price has been reduced. A photodiode or the like has a minute light emitting surface, and is a module in which a light emitting substance and a minute lens for diffusing or condensing light emission are integrated.

[0004]

A conventional illumination lamp requires a large condensing optical system in order to make the illumination light visible even from a distance. Cannot be observed as a natural color mixture.

In view of the above, the present invention has been made to improve such a point, and it is possible to provide directivity in an omnidirectional direction or a specific direction in an extremely small size while observing at a short distance. It is another object of the present invention to provide an illumination lamp that can be observed as a natural color mixture.

[0006]

According to an embodiment of the present invention, there is provided a luminaire including a plurality of flexible lamps on a flexible printed circuit board as shown in FIG. Printed light-emitting elements 11
It is characterized in that the illumination direction has directivity in all directions or a specific direction depending on the degree of bending of zero.

[0007] By forming a large number of directional light-emitting elements 11 with light-emitting elements of a plurality of different colors, additive color mixture can be obtained.

A plurality of light-emitting elements 11 of different colors are connected to a light-emitting control circuit, and the light-emitting control circuit selects and operates the light-emitting elements of each color, thereby changing the color tone and obtaining a desired additive color mixture.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of an embodiment of an illumination lamp to which the present invention is applied. In the illumination lamp 1 of this figure, a large number of light emitting diodes 11 are arranged on an outer surface of a hemispherical cylindrical printed circuit board 10, and a cap 16 in which a light emission control circuit is incorporated is covered. The cap 16 has a connector 17 for connecting the light emission control circuit to a power supply.
Is attached.

As shown in FIG. 2, each light emitting diode 11 has a PN junction 12 connected to lead wires 14A and 14B, and is sealed with a transparent plastic cover having a spherical convex lens 13 at the tip. Therefore, the light emitted from the PN junction 12 passes through the convex lens 13 and becomes a pencil beam having a slight opening angle θ centered on O, and has strong directivity.

The printed circuit board 10 has a hemispherical cylindrical shape, but the prototype is a flat plate having radially-shaped comb teeth 9 and a circular outer periphery as shown in FIG. This plate is made of bakelite and is flexible. The conductor of the through hole 8 is formed in each comb tooth 9, and the circuit conductor is printed on the back surface. A light emitting diode 11 is inserted into each through hole 8, and leads 14A and 14B are connected to circuit conductors. In the illumination lamp of this example, 432 light emitting diodes 11 are attached. Each comb tooth 9 is bent along the plate thickness, and its tip 9a is inserted into each of the slots 5 formed in the same number as the comb teeth inside the outer periphery of the bakelite disk 6 shown in FIG. The substrate 10 forms a hemispherical cylindrical shape (see FIG. 1). The bakelite disk 6 is provided with a hole 3 for passing a wiring connecting the connector 17 side and the light emitting diode 11 side.

When the illuminating lamp 1 is connected to a power supply by a connector 17, the light emitting diode 11 emits light. Since this light emission is directional with a pencil beam having an opening angle θ, the light is directed only in front of the hemispherical cylindrical hemisphere and the cylindrical surface, that is, only in the observation direction. Therefore, efficient use of light energy can be achieved without using a concave mirror such as a lighting umbrella or a condenser lens.

In this hemispherical cylindrical illumination lamp 1, the hemispherical surface is oriented in a direction near the observation position, and the cylindrical surface is oriented in a direction in which the observation position is far. For example, as shown in FIG.
And observe from a wide area, it is found that the person A
Observes near the tip of the hemisphere R at a short distance, and the person B in the periphery observes the cylindrical surface C from a long distance. The central direction O of the light-emitting beam of each light-emitting diode 11 on the hemispherical surface R extends radially from the center of the hemisphere, and the central direction O of the light-emitting beam of each light-emitting diode 11 on the cylindrical surface C extends from the center of the cylinder but is linear. (Up and down) are parallel without spreading. Therefore, since the short distance person A observes the illumination sparsely and the long distance person B observes the illumination closely, the short distance person A does not feel unnecessarily bright, and even the long distance person B It can be observed with sufficient brightness.

FIG. 6 shows an example of a light emission control circuit incorporated in the cap 16 of the illuminating lamp 1 shown in FIG. 1. As light emitting diodes, a red light emitting diode 11R and a green light emitting diode 1R are used.
1G and three color LED of blue light emitting diode 11B
The unit 20 allows various colors to be observed by additive color mixing. This circuit has a system of a DC power supply circuit 21 that supplies light-emitting power to each of the light-emitting diodes 11R, 11G, and 11B of the LED unit 20, a serial transmitter 22 that supplies an on / off signal of the light-emitting power, and an effect data generation circuit 23. It consists of a control system. still,
Each light emitting diode 11R, 11 of the LED unit 20
G and 11B are attached to the portions indicated as the light emitting diodes 11 in FIG.

In the circuit of FIG. 6, the effect data, for example, red,
Production data such as turning on green and blue every 10 seconds is sent from the generation circuit 23 to the serial transmitter 22,
The on / off serial signal from the serial transmitter 22 is L
It is supplied to the operation end of the switch 25 in the ED unit 20. On the other hand, from the DC power supply circuit 21, the LED unit 2
A DC voltage is applied via the switch 25 within 0, and the light emitting diodes 11R (red), 11G (green), and 11B (blue) emit light in order according to the ON / OFF signal of the operation terminal. Lighting diode 11 with different lighting effect data
If R and 11G emit light simultaneously, yellow can be observed.

FIG. 7 shows another example of a light emission control circuit, which is an illumination lamp incorporating red, green, and blue light emitting diodes, each of which can perform dimming of 0 to 256 gradations as light emitting diodes. 1 is controlled.

As shown in FIG. 7, this light emission control circuit
The serial signal line 30 to which the light emission effect data is supplied is electrically separated by a photocoupler 31 and is photoelectrically coupled. The circuit is composed of four shift registers 32
32R, 32G, 32B, magnitude comparator 33, address setting switch 34, three data latch circuits 35R, 35G, 35B, three digital comparators 36R, 36G, 36B, three LED drivers 37R, 37G, 37B , And an 8-bit binary counter 38. It should be noted that R ·
GB represents a red, green, and blue system.
The light emitting diodes of each color of the illumination lamp 1 are serially connected,
The LED driver 37R, 37G, 37B is connected to a DC power supply via a switch having an operating end via a protection resistor 39.

In the circuit shown in FIG.
Production data of a 2-bit serial signal is sent. 32
Of the bit serial signal, the first 8 bits are red light control data, the next 8 bits are green light control data, the next 8 bits are blue light control data, and the last bit is address data. , And distributed to the shift registers 32, 32R, 32G, and 32B, respectively, according to the serial signal format. The address data input from the shift register 32 to the magnitude comparator 33 is determined by comparison with the data set by the address setting switch 34. When the address data matches the address set value, the remaining 8-bit data of the remaining shift registers 32R, 32G, and 32B are used as dimming data as data latch circuits 35R, 35G, and 35B.
And the digital comparator 3
At 6R / 36G / 36B, a comparison with an 8-bit binary counter 38 is performed. Digital comparator 36R
The data output from the 36G / 36B dims the red light emitting diode, the green light emitting diode, and the blue light emitting diode incorporated in the illumination lamp 1 via the LED drivers 37R, 37G and 37B.

Since the red light emitting diode, the green light emitting diode, and the blue light emitting diode can each perform dimming of 0 to 256 gradations, almost full-color light emission can be performed by additive color mixing by adjusting dimming of three primary colors.

The illumination lamp 1 of the above embodiment has a hemispherical cylindrical shape, and illuminates the direction expanding from the center of the hemisphere on the hemisphere side, and illuminates the direction expanding from the center line of the cylinder on the cylindrical surface side, and linearly illuminates the direction. Has a directivity that does not spread, but it is possible to have a directivity other than that. For example, if the printed circuit board of the lighting lamp 1 is finished in a spherical shape, illumination can be performed in all directions, and if the printed circuit board is left flat,
The narrow directivity of the light emitting diode appears as it is.

[0021]

As described above in detail, the illumination lamp to which the present invention is applied uses a large number of light-emitting diodes, so that the illumination direction can be reduced in all directions or in a specific direction while being small. You can have. In addition, by using a combination of light emitting diodes having different emission colors, it is possible to realize an illumination lamp that can observe a natural color even when observed at a short distance.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment of an illumination lamp to which the present invention is applied.

FIG. 2 is a diagram showing an example of a light emitting diode used for an illumination lamp to which the present invention is applied.

FIG. 3 is a plan view showing an example of a prototype board of a printed circuit board used for an illumination lamp to which the present invention is applied.

FIG. 4 is a plan view showing an example of a disk combined with a printed board.

FIG. 5 is a diagram illustrating the directivity of an illumination lamp to which the present invention is applied.

FIG. 6 is a block diagram illustrating an example of a light emission control circuit used for an illumination lamp to which the present invention is applied.

FIG. 7 is a block diagram showing another example of the light emission control circuit.

[Explanation of Signs] 1.1R, 1G, 1B are illumination lights, 3 is a hole, 5 is a slot, 6
Is a bakelite disk, 8 is a through hole, 9 is a comb tooth, 9
a is the tip, 10 is the printed circuit board, 11 ・ 11R ・ 11G
11B is a light emitting diode, 12 is a PN junction, 13 is a convex lens, 14A and 14B are lead wires, 16
Is a cap, 17 is a connector, 20 is an LED unit,
21 is a DC power supply circuit, 22 is a serial transmitter, 23 is an effect data generation circuit, 25 is a switch, 30 is a serial signal line, 31 is a photocoupler, 32, 32R, 32G, 3
2B is a shift register, 33 is a magnitude comparator, 34 is an address setting switch, 35R / 35G
35B is a data latch circuit, 36R, 36G, 36B
Is a digital comparator, 37R / 37G / 37B is L
An ED driver, 38 is a binary counter, and 39 is a protection resistor.

Claims (3)

[Claims] 1. A lighting device comprising: a plurality of directional light-emitting elements arranged on a flexible printed circuit board; and an illuminating direction having an omnidirectional direction or a specific direction depending on the degree of bending of the printed circuit board. light. 2. The light emitting device according to claim 1, wherein the plurality of directional light emitting devices are light emitting devices of a plurality of different colors.
Illumination lamp according to. 3. A light emitting device according to claim 2, wherein said plurality of light emitting elements of different colors are connected to a light emitting control circuit, and the color tone is changed by selecting and operating the light emitting elements of each color by said light emitting control circuit. 2. The illumination lamp according to 1.