JPH05157916A - Optical fiber display device - Google Patents

Abstract

PURPOSE:To attain high brightness and low power consumption as for an optical fiber display device which displays a still picture or a moving picture. CONSTITUTION:The ends of plural optical fibers 2 containing fluorescent pigment are bundled, and the other ends are arranged at specified intervals in a display part 4. Light from a light source 3 is inputted from one end face 2a or the side part of the optical fiber 2 group and the light of specified color is outputted from the other end face 2b to the display part 4. The outputted light is transmitted or intercepted by the action of a shutter so as to display a specified picture in the display part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber display device for displaying still images and moving images using an optical fiber.

In recent years, when an advertisement or the like is displayed outdoors, since it is easily affected by sunlight or the like, it is necessary to have high brightness in order to perform a clear display. Therefore, it is desired that the light source has high brightness and low power consumption.

[0003]

2. Description of the Related Art FIG. 6 is a block diagram of a conventional optical fiber display device. In FIG. 6, the optical fiber display device 20
Is composed of a projector 21, an image input unit 22, and an image display unit 23.

The image input section 22 includes a predetermined number of optical fibers 2
One ends of the four groups are tightly bundled and fixed to a transparent fixing plate 25. The image display unit 23 has the other ends of the group of optical fibers 24 fixed to the display plate 26 at predetermined intervals corresponding to the arrangement of the fixing plate 25. In this case, each optical fiber 2
4 corresponds to each pixel of the image from the projector 21, and the number of the optical fibers 24 is set.

In such an optical fiber display device 20, a stationary image or a moving image from the projector 21 is fixed on the fixing plate 2.
When input to the end surface of the optical fiber group 24 of No. 5, the image is transferred by the optical fiber group 24, projected on the display plate 26 with a large screen.

As described above, the optical fiber display device 20 is
Since images are transferred by the group of optical fibers 24, the image display unit 23 has an advantage for outdoor use that it is not directly transmitted to the heat of the projection light source (projector 21) and does not cause an electrical short circuit due to water or the like.

FIG. 7 shows another conventional block diagram. In FIG. 7, each of the three types of light sources 30a to 30c has R
Color filter 3 consisting of (red), G (green), and B (blue)
1a to 31c are provided facing each other. Color filter 31
a to 31c and light sources 30a to 30c, corresponding to respective pixels, shutter valves 32a to 3 made up of LCDs.
2c is attached, and the optical fibers 33a to 33c are integrated on the display surface 34 as a light guide medium corresponding to each monocolor pixel.

[0008]

However, the image display unit 2
In No. 3, since each optical fiber 24 has a space, the image cannot be recognized unless it is located at a position apart to some extent, and it is difficult to achieve high resolution. Further, when performing color display, since a color filter is used, it is necessary to increase the light amount of the light source in order to achieve high brightness, the light source becomes a large power, and heat generation measures of the heat source against it are necessary. There is a problem.

Further, the method of FIG. 7 requires the light sources 30a to 30c corresponding to the three primary colors, the color filters 31a to 31c, and the shutter valves 32a to 32c, respectively, which causes a problem that the entire display becomes large.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an optical fiber display device capable of achieving high brightness and low power consumption.

[0011]

Means for Solving the Problems The above-mentioned problems include a light source, an optical fiber containing a plurality of fluorescent dyes, one end of which is bundled, and light from the light source is input at the one end surface or the side portion.
This can be solved by arranging the other ends of the optical fibers at a predetermined interval and configuring the transferred light with a display unit that displays a predetermined image by a shutter operation. In this case, a monochromatic display or a color display is performed by the fluorescent dye of the optical fiber.

[0012]

As described above, the optical fibers containing a plurality of fluorescent dyes are bundled at one end, and the light from the light source is input from the one end face or the side part, and the other end is arranged in the display part at a predetermined interval. is doing. In the display unit, a predetermined image is displayed by the shutter operation corresponding to the light output from the other end of the optical fiber.

Further, when all the optical fibers output light of the same color due to the fluorescent dye contained in the optical fibers, a mono-color display is displayed. Further, color display is performed by changing the fluorescent dye in order to change the optical output of each optical fiber to any of the three primary colors of red, green and blue, and arranging the optical fibers on the display unit in units of the three primary colors. In this case, the light from the light source may be sunlight, natural light, or artificial light.

With this, since it is not necessary to interpose a color filter when a mono-color or full-color display is performed, attenuation of light from the light source is reduced, and high brightness can be achieved. Further, since the light source is not limited to artificial light and can use sunlight or natural light, it is possible to reduce power consumption during display.

[0015]

FIG. 1 is a block diagram of the first embodiment of the present invention. In FIG. 1, the optical fiber display device 1 is provided with a plurality of optical fibers 2, one end of which is tightly bundled and attached to a transparent fixing plate (not shown) (see FIG. 4). And
Light from the light source 3 is input to the bundled one end surface 2a (may be input from the side surface). In this case, the light from the light source 3 includes sunlight, natural light from an illumination tower, and artificial light (white light of a fluorescent lamp or a halogen lamp).

On the other hand, on the other end surface of the group of optical fibers 2, each optical fiber 2 is arranged on the display unit 4 at a predetermined interval. Display 4
Is a flat light valve that operates as a shutter, such as a liquid crystal display or PLZT (lead lanthanum zirconate titanate). Then, one optical fiber 2 corresponds to each pixel of a liquid crystal display or the like.

Further, the optical fiber 2 contains a fluorescent dye, and depending on the type of the fluorescent dye, it outputs light of a predetermined color depending on the input light (described later).

For example, all the optical fibers 2 are made to contain the same fluorescent dye, and light of the same color is output to perform monocolor display. Further, each optical fiber 2 is classified into one containing three kinds of fluorescent dyes for three primary colors (red, green, blue), and the three optical fibers 2 of three primary colors are provided on the other end surface 2b.
Are arranged in the display unit 4 as a unit for full color display.

Such an optical fiber display device 1 outputs light of a predetermined color from the other end surface 2b to the display section 4 by the light input from the one end surface 2a of the optical fiber 2. The display unit 4 displays an image of a predetermined color by a shutter operation for transmitting and blocking each pixel according to each optical fiber 2.

Here, FIG. 2 shows a diagram for explaining the optical fiber of FIG. In FIG. 2, in addition to the conventionally well-used perylene-based fluorescent dye 5, BBOT (2.5-Bis [5′-tert-bu] is added to the plastic resin of the optical fiber 2, for example, polycarbonate resin.
tylbenzoxazoy1] thiophene) Fluorescent dye 6 (in addition to coumarin dye, imidazole dye) or mixed dyes thereof are added.

The BBOT fluorescent dye 6 has an absorption spectrum of about 400 nm and emits fluorescence at an emission wavelength of 433 nm. On the other hand, the wavelength band of the absorption spectrum of the perylene-based fluorescent dye 5 extends to the vicinity of 420 nm on the low wavelength side, and therefore partially overlaps the wavelength band of the emission spectrum of the BBOT fluorescent dye 6.

Now, in the center of FIG. 2, ◯, that is, when an external incident light ray is incident on the BBOT fluorescent dye 6 and is absorbed, 433
It emits fluorescence of nm and is incident on three surrounding ⊚, that is, the perylene-based fluorescent dye 5, is absorbed and emits light. On the other hand, apart from that, the perylene-based fluorescent dye 5 directly receives and absorbs an external incident light ray to emit light.

That is, the emission of light by absorption of direct light and B
High brightness is achieved by the effect of superimposing BOT on absorption and emission after the emission process.

As described above, since the display section 4 is composed of the flat light valve, the resolution is high even if the optical fibers 2 are arranged at intervals. In addition to the characteristics of the optical fiber 2 described above, since no color filter is used, light attenuation is reduced, and high brightness can be achieved without increasing power consumption. On the other hand, when it is used for color adjustment, the brightness may be adjusted by using a color filter.

By installing the group of optical fibers 2 outdoors, it is possible to collect sunlight in the daytime and to irradiate light with natural light or artificial light from an illumination tower or the like at night, resulting in low power consumption. Can be realized.

Next, FIG. 3 shows a block diagram of a second embodiment of the present invention. In the optical fiber display device 1 in FIG. 3, both end surfaces 2a and 2b of the optical fiber 2 are planted in a transparent plate 7 made of acrylic resin or the like, and the transparent plate 7 is attached to the back surface of the display unit 4. In this configuration, the optical fibers 2 are arranged in an array to facilitate the placement on the display unit 4.

The arrangement of the optical fibers 2 in this case has no particular order of arrangement in the case of mono-color display, but in the case of full-color display, there are three optical fibers for the three primary colors depending on the type of fluorescent dye shown in FIG. 2 are arranged as one unit.

The optical fiber display device 1 shown in FIG.
By inputting light (sunlight, natural light, artificial light) from the light source 3 from the side part of the optical fiber 2 group, as shown in FIG. 2, light of a corresponding color is emitted from both end surfaces 2a and 2b. It is output to the display unit 4 via, and the effect is the same as in FIG.

Next, FIG. 4 shows a block diagram of a third embodiment of the present invention. In FIG. 4, three primary color fluorescent fibers 8a-
8c are regularly arranged on the display surface 9 side. On the other hand, on the projection side of the light source 3, an optical shutter array 10 of an LCD having pixels made up of image data corresponding to R, G and B is arranged. According to this method, as compared with the conventional color-compatible optical fiber display as shown in FIG.
Since the color filters (31a to 31c) are not required and only one LCD or light source is required, the weight and size of the device can be reduced.

FIG. 5 shows a block diagram of the fourth embodiment of the present invention. In FIG. 5, sheets 11 containing a fluorescent dye as fluorescent fibers are arranged in a mosaic pattern in the order of R, G, B, and an optical shutter array 12 composed of an LCD, which is a display unit, is arranged on both sides of the display. This method is shown in FIG.
Similarly to the above, a color filter is not required, and only one LCD and light source are required, and the weight and size of the device can be reduced, and when used outdoors during the daytime, no special light source is required.

[0031]

As described above, according to the present invention, the other end surface or both end surfaces of the optical fiber containing a plurality of fluorescent dyes are arranged in the display portion, and predetermined by the input light from one end surface or side portion. By outputting color light to the display unit, high brightness can be achieved, and low power consumption can be achieved because sunlight or the like can be used.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the optical fiber of FIG.

FIG. 3 is a configuration diagram of a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a conventional optical fiber display device.

FIG. 7 is another conventional configuration diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber display device 2 Optical fiber 2a One end surface 2b The other end surface 3 Light source 4 Display unit 5 Perylene fluorescent dye 6 BBOT fluorescent dye 7 Transparent plate

Front Page Continuation (72) Inventor Tomoyoshi Nomura Nihonhon Telegraph and Telephone Corporation, 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo

Claims (5)

[Claims] 1. A light source (3), one end of which is bundled, and light from the light source (3) is bundled with the one end face (2).
a) or an optical fiber (2) containing a plurality of fluorescent dyes input at the side and the other end of the optical fiber (2) are arranged at a predetermined interval, and the transferred light is subjected to a predetermined image by a shutter operation. An optical fiber display device comprising: a display section (4) for displaying. 2. A light source (3), and light from the light source (3) is input from both sides to both end faces (2).
a, 2b), the optical fibers (2) containing a plurality of fluorescent dyes, and both end faces (2a, 2b) of the optical fibers (2) are arranged at a predetermined interval, and the both end faces (2a, 2a, An optical fiber display device comprising: a display unit (4) for displaying a predetermined image by a shutter operation corresponding to the light output from 2b). 3. The display section (4), wherein the same color is optically output from the optical fiber (2) containing the plurality of fluorescent dyes.
3. The optical fiber display device according to claim 1, wherein the optical fiber display device performs a mono-color display. 4. The optical output of an optical fiber (2) containing a plurality of fluorescent dyes is classified into three primary colors by changing the fluorescent dyes, and the optical fiber (2) is displayed on the display unit (4) in units of three primary colors. ) Is arranged for color display, and the optical fiber display device according to claim 1 or 2. 5. A light source, a plurality of sheets (11) containing a predetermined fluorescent dye for inputting light from the light source from one end face, and a plurality of the sheets (11) arranged side by side, An optical fiber display device comprising: a display unit (12) for displaying a predetermined image by a shutter operation of light transferred from a side end surface.