JPH11249608A - Light emitting display device and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable light emitting display in the shape of stripes in various colors by adjusting color tones even in the case of a little light emitting diodes(LED). SOLUTION: A light emitting display device is constituted by providing optical fiber members, LED 4R, 4B and 4G in red, blue and green of three primary colors of light and control part 5, and the control part 5 is provided with white controllers 6, 7 and 8 for controlling luminance so as to provide the synthetic color of white and a light emission adjusting means 10 for controlling the emission of light by outputting a luminance control command to each LED with the white controlled result as a reference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a light-emitting display device using an optical fiber material and a light-emitting diode.

[0002]

2. Description of the Related Art Conventionally, as such an indicator, there is a neon tube, but since the neon tube is formed of a glass tube, not only is the tube broken, but also there is a problem that the ball is cut. In addition, there is also a problem that since a product formed in a predetermined shape is attached, on-site transportation or the like is troublesome and complicated, and the shape cannot be changed afterwards at the site. On the other hand, there is a light emitting device using a light emitting element such as a light emitting diode which can be used semi-permanently without fear of the ball breaking. In some of such devices, a plurality of light-emitting diodes are formed into a long shape in which a plurality of light-emitting diodes are sealed in a flexible resin tube material, and the light-emitting diodes can be used for decorative arrangement.

[0003]

However, since the light emitting diode using the light emitting diode emits light in a state where the light emitting diode is scattered, the light emitting device is not only a long light emitting device but also a dotted linear light emitting device with a long interval. It is necessary to arrange the light emitting diodes continuously without any gap in order to perform a continuous rod-shaped light emitting display like this.However, there is a problem that a large number of light emitting diodes are required and the feasibility is poor. is there. Furthermore, the color emitted is the color emitted by the light emitting diode itself, and there is a problem that it is not possible to emit light in which various colors are mixed, and there is a problem that the present invention does not solve.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above circumstances, and has a light transmitting columnar optical fiber material and an optical fiber. At least three types of light-emitting diodes disposed at at least one end of the material and emitting red, blue, and green light as light sources for light leaking from the peripheral surface of the optical fiber material to the outside; A control unit for controlling light emission of the diode; the control unit includes a white adjustment unit for adjusting luminance so that a white composite color is obtained; and a light emission unit based on the white adjustment. And a tone adjustment control means for outputting a brightness adjustment command to the diode to control the diode so as to obtain various colors. According to the present invention, with this configuration, it is possible to easily perform light emission display of almost infinite kinds of colors from the optical fiber material. Also, in this device, the light emitting diodes of each color are arranged at both ends of the optical fiber material, and thus, the color tone is changed while being a single optical fiber material. There is an advantage that can be. Further, when light from a light emitting diode disposed at least at one end of a light-transmissive columnar optical fiber material is leaked to the outside from the peripheral surface of the optical fiber material to perform light emission display,
The light-emitting diodes emit at least three kinds of light of three colors of red, blue and green, and the brightness of each of the light-emitting diodes is first adjusted to a white composite color, and the white-adjusted light is used as a reference. The present invention also relates to a method for controlling a light emitting display device in which a luminance adjustment command is output to each light emitting diode to control the light emitting diodes so as to obtain various combined colors.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In practicing the present invention, an optical fiber material needs to pass a part of light through the fiber while leaking to the outside. It is preferable to use a material with a low refractive index rather than a material with a high refractive index, but if the irradiation direction of the light source can be arranged so as to exceed the critical refractive angle of the optical fiber material, a material having a high refractive index is used. Anything can be adopted. As the optical fiber material, it is preferable to use a translucent and bendable flexible resin material. By doing so, it is possible to freely bend and attach the work according to the site of the work. There is an advantage that the degree can be secured. Further, as the light source, a light emitting diode, a substrate on which the plurality of light emitting diodes are incorporated, and a cap material which is attached to the end of the optical fiber so as to be fitted externally, and incorporates the substrate such that the light emitting direction of the light emitting diode faces the end face of the optical fiber. Will be composed of

In this case, as the light emitting diode composed of the three primary colors of light, for example, a light emitting diode planted on a generally known printed circuit board can be used, but this substrate surface is made to face the end surface of the optical fiber material, and If the opposing substrate surface is made a light reflecting surface by performing pattern plating or the like, the light emitted from the opposite end surface of the optical fiber material does not leak from the peripheral surface of the optical fiber material, and is returned into the optical fiber material again. You can go back. When the substrate surface is used as a light reflecting surface in this way, if the reflected light passes through the optical fiber material again and exits from the other end surface of the fiber, the light simply passes through the optical fiber material, which is not very meaningful. There, there is no irregular reflection surface by making the light reflection surface uneven or spherical, or by mounting the substrate surface so that it is not parallel to the fiber end surface but inclined, so that the critical angle of refraction of the reflected light can be reduced. There is an advantage that it can be returned to the optical fiber material in a state of exceeding. In addition, as such correspondence,
It can be used not on the substrate side but also on the end face side of the optical fiber material.
In other words, the end surface of the optical fiber material is not a flat end surface but a convex spherical surface,
A concave spherical surface, an inclined surface, or the like can also be used. Further, it is preferable that the inner surface of the cap material is also a reflection surface, and there is an advantage that light hitting the inner surface of the cap material can be reflected and sent to the optical fiber material. In this case, the inner surface of the cap surface does not directly face the end surface of the optical fiber material like the surface of the substrate, and since it is an inner cylindrical surface, it is not always necessary to provide a diffuse reflection surface or the like as the surface of the substrate. However, a diffuse reflection surface or the like may be used. By reflecting the light leaking from the end face of the optical fiber material and returning it to the optical fiber material again, it is necessary for the light-emitting diodes attached to each light source that the optical axis direction exceeds the critical angle of refraction. Not possible to install. In other words, the light emitting diodes may be mounted so that the optical axis direction is parallel to the axial direction of the optical fiber material. In this way, a large number of light emitting diodes can be mounted with a small mounting area to achieve high brightness. There is an advantage. In addition, the light emitting diode is basically a light emitting diode of three primary colors of red, green, and blue light, but it is needless to say that yellow or the like can be added as needed.

Next, an embodiment in which the present invention is actually embodied will be specifically described. 1 and 2, 1
Is an optical fiber material having a cylindrical shape, and the optical fiber material 1 is made of a flexible transparent resin material having a diameter of 18.4 mm. Reference numeral 2 denotes a light source cap material attached to both ends of the optical fiber material 1. The cap material 2 has a cylindrical shape, and one half of the cap material 2 is externally fitted to the end of the fiber material 1. A printed circuit board 3 is attached to the cap member 2 so as to face the end face 1a of the optical fiber member 1. On the surface 3a of the substrate 3 opposite to the fiber end surface 1a, light emitting diodes 4 emitting red (4R), blue (4B), and green (4G), which are the three primary colors of light, are mounted in a standing manner. However, in the present embodiment, the red light emitting diode 4R has 6
, Blue and green light emitting diodes 4B and 4G, each of which is provided with 12 light emitting diodes. Six of the optical fiber materials 1 that are close to the optical axis (illustrated by only arcs in FIG. 3) have their optical axes mounted substantially parallel to the optical fiber material 1 axis, and The individual ones (shown in FIG. 3 in the form of an inclined cylinder) are attached in an inclined manner. The light emitting diodes 4 are arranged so that all light emitting surfaces are located within the diameter of the optical fiber material 1. In the present embodiment, the substrate surface 3a is set to be a light reflecting surface by pattern plating, and the fiber end surface 1a and the substrate surface 3a are not parallel but slightly inclined (for example, about 1 °). ) It is set to face in the state. Further, the inner peripheral surface 2a of the cap member 2 is also a reflection surface which has been mirror-finished by processing means such as vacuum evaporation.

Next, each of the light emitting diodes 4R, 4B, 4
The light emission control method of G will be described. In this, reference numeral 5 denotes a control unit configured using various electronic and electric components such as a microcomputer.
Red, blue, and green light emitting diodes 4R, 4R
Controllers 6, 7, and 8 for adjusting the brightness of B and 4G are connected (they can be configured to be freely detachable (removable) by connecting via plugs and the like as necessary), and a mode changeover switch 9 , And the light emission adjusting means 10 are respectively connected. The mode changeover switch 9 switches between a white adjustment mode and a normal mode for performing light emission adjustment control. Now, by switching to the white adjustment mode, the adjusters 6, 7, and 8 are adjusted so that each light emitting diode 4
The brightness of R, 4B, and 4G can be adjusted, respectively, so that the optical fiber material 1 can be adjusted to be white. Incidentally, the mode changeover switch 9 is not always necessary, and the mode changeover switch 9 may be set so that it can be adjusted at any time by adjusting the adjusters 6, 7, 8; Can be set to automatically enter the white adjustment mode by connecting. Then, the brightness control state adjusted in white in this way is stored in the memory means 12 by operating the enter switch (enterswitch) 11, whereby white adjustment is performed. On the other hand, the light emission adjusting means 10 for performing light emission adjustment control adjusts the color of light emitted from the optical fiber material 1 and adjusts the light emission state such as continuous lighting, blinking lighting, and the like. The control unit 5 can easily perform almost infinite color tone adjustment by appropriately performing the brightness adjustment of each light emitting diode based on the white brightness set, and for example, red → pink → yellow → blue If you want to change the color from yellow to green to white to red,
Based on the stored brightness control state, the control commands for the brightness adjustment of each color and the timing (time) are set and output. The light emission adjustment means 10 also includes white color adjusters 6, 7, 8 Similarly, it can be set to either a freely connectable external input method (exterior type) or an interior type. When the external input method is used, the set control command is stored in the memory unit 12, and light emission control is performed based on the stored control command. Further, the control unit 5
The brightness adjustment of each of the left and right light emitting diodes 4R, 4B, 4G can be individually performed. In this way, in one optical fiber material 1, for example, one end has a strong red color tone, The side can be given a change such as a strong green one. Further, as a control unit, when a plurality of optical fiber materials 1 are arranged in series or in parallel, it can be set so that these color tone controls can be executed individually, and Of course, it is also possible to provide a plurality of light emission groups with a plurality of light emission groups being set as one light emission group and to perform light emission control for each of these light emission groups.

As described above, in the embodiment according to the present invention, the light emission of the optical fiber material 1 is performed by the light emitting diodes 4 as colored ones. , Blue, and green are employed, and the light emission control is performed based on the luminance adjusted in advance to white, so that various desired color tone adjustments can be easily performed. As a result, as compared with the conventional neon sign display or simply the light emitting diode display, which can only emit light in a single color, the variability is excellent, and it is a revolutionary display device such as an advertising device. In addition, since the color tone adjustment is performed based on a white color adjusted in advance, a simple and empirical synthesis of colored light can be used as it is.

Further, in this device, the light emitting diodes 4R, 4B, 4G are provided on both sides of the optical fiber material 1, respectively, and the brightness adjustment of each of the light emitting diodes 4R, 4B, 4G can be performed particularly. 1
Even in this case, light emission in a state in which the color tone is different and change of the light emission can be arbitrarily performed, and the display function can be further enhanced. Substrate surface 3a and inner peripheral surface 2a of cap material
Is a reflecting surface, so that the end face 1 of the optical fiber material 1
The light leaked from a can be returned to the optical fiber material 1 again, so that the light is prevented from being wastefully emitted from the end face 1a, and an efficient light emitting display can be obtained. Furthermore, since the substrate surface 3a and the fiber material end surface 1a face each other with a slight inclination, it is assumed that light parallel to the axis of the optical fiber material 1 leaks from the end surface 1a and is reflected by the substrate surface 3a. When this is incident on the fiber material end face 1a, it is not a parallel light beam, so that it will eventually leak from the peripheral surface of the optical fiber material 1,
Here also, the light efficiency is improved.

Incidentally, the light leaked from the fiber material end surface 1a is not reflected only on the substrate surface 3a and the inner peripheral surface 2a of the cap. In the present embodiment, the light emitting diodes 4 are collectively arranged so as to be arranged within the end face diameter of the fiber material 1a, and the area where the substrate surface 3a directly faces the fiber end face 1a is small. The light-emitting diode 4 has a large area directly facing the fiber material end face 1a. Therefore, most of the light leaked from the fiber material end face 1a impinges on the light-emitting diode 4 and is reflected (the light that has once entered the light-emitting diode is not reflected). Including those that come back again). The light reflected by the light emitting diode 4 is the light emitting diode 4
Has a cylindrical shape, and its tip is spherically processed, so that most of the light is reflected in an irregularly-reflected state. Therefore, as in the present embodiment, the substrate 3 is inclined or the substrate surface 3a is irregularly reflected. Although it is not always necessary to form the surface, it is effective when the number of light emitting diodes 5 is small or when the area where the substrate surface 3a directly faces the fiber material end surface 1a is large. In addition, some of the light reflected by the light emitting diode 4 impinges on the cap inner peripheral surface 2a, and such light is reflected by the cap inner peripheral surface 2a and effectively used as a light source.

[Brief description of the drawings]

FIG. 1 is a front view of a light emitting display device.

FIG. 2 is a sectional view of a light source unit.

FIG. 3 is an explanatory diagram showing an arrangement state of a light source.

FIG. 4 is a block diagram illustrating a control state in a control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber material 2 Cap material 3 Printed circuit board 4 Light emitting diode 5 Control part 6 White adjuster 7 White adjuster 8 White adjuster 9 Mode switch 10 Light emission adjusting means 11 Decision switch 12 Memory means

Claims (3)

[Claims] 1. A light transmitting columnar optical fiber material,
Disposed on at least one end of the optical fiber material,
As a light source of light leaking outside from the peripheral surface of the optical fiber material, red, blue, and at least three types of light emitting diodes that emit light of three colors of green, and a control unit that controls light emission of each light emitting diode The control unit includes a white adjustment unit for adjusting the luminance so as to be a composite color of white, and outputs a luminance adjustment command to each light emitting diode based on the white-adjusted color to output various values. A light-tone display device comprising: a color-tone adjustment control unit that controls the color to be adjusted. 2. A light-emitting display device according to claim 1, wherein the light-emitting diodes of each color are arranged at both ends of an optical fiber material. 3. When light from a light emitting diode disposed at least at one end of a light transmitting columnar optical fiber material is leaked to the outside from the peripheral surface of the optical fiber material, a light emitting diode is used. At least three types of light emitting three colors of red, blue, and green, and each of the light-emitting diodes is first adjusted in brightness so as to have a white composite color, and each light-emitting diode is adjusted based on the white-adjusted light. A method of controlling a light emitting display device, in which a luminance adjustment command is output to a diode to control various colors.