JPS6313002A - Multicolor filter - Google Patents

Abstract

PURPOSE:To obtain the effect of a color display filter and a light collecting function by one sheet, to make a multicolor display, and to improve weather resistance by emitting dispersedly colored light which is incident from bundled terminals of respective colors. CONSTITUTION:Optical fibers are arranged regularly in parallel and their flanks consist of light projection parts in a light leak state by rubbing or etching by a mechanical or chemical means. Light leaks in the flanks constitute an optical fiber body. Then, plural bundled terminals 1-3 for individual display colors corresponding to red 4, green 5, and blue 6 are formed on one side B of the sheet. Then, colored light beams from light sources 4-6 are made incident on the respective bundled terminals. The colored light beams which are incident from the bundled terminals of the respective display colors are emitted dispersedly and regularly by utilizing the photoconduction characteristics of the opticalfibers.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field> The present invention provides a multi-purpose display multi-purpose display device that is capable of emitting colored light in a uniformly distributed manner from a light emitting portion in which optical fibers are densely arranged in a sheet shape. Regarding color filters.

<Prior Art> Multicolor filters are widely used, for example, as filters for liquid crystal color display in twisted nematic mode.

This filter is made by dyeing, electrodeposition, vacuum evaporation, printing, photosensitive film, etc. The filter itself is made on a plastic film or glass substrate.
For example, the three primary colors red, green, and blue are arranged in a mosaic or striped pattern using any of the methods described above to form a sentence structure. .

<Problems to be Solved by the Invention> When these conventional multicolor filters are incorporated into, for example, a liquid crystal, no effort is made to balance saturation and brightness, which is superior to color displays.

However, dyes and pigments are used to color the color filters, such as red and green.

It is difficult to uniformly color each n of blue,
Light transmission spots occur on color filters after they are arranged in a mosaic or striped pattern. This is expressed as shading of colored light, and it has been pointed out that this is undesirable.

Furthermore, color LCDs are often used outdoors, for example in the case of pocket color TVs, which emphasize portability.
Excellent light resistance is a major performance requirement.

For example, when exposed outside the conventional multi-color filter 11, green and red fade, and green in particular fades after about 130 days of outdoor exposure, causing the balance between red and blue to be disrupted and the entire LCD panel screen to turn reddish-purple. Many shortcomings were also pointed out, such as
ing.

In addition, unlike self-luminous display panels, these LCD panels require light to come in from the outside, and the current situation is that they either use the light they bring in as reflected light or use gold backlights. be. When used as a backlit light source, the difference in brightness due to the backlight's light source spots is a major factor in determining the quality of the liquid crystal panel.

A Companion Means for Solving the Problems> The inventors of the present invention have conducted extensive research and arrived at the present invention with the aim of solving all of the problems.

The present invention includes a light emitting part in which optical fibers with light leaking side surfaces are densely arranged in a sheet shape, and optical fibers at one or both ends of the sheet are formed on a plurality of converging ends for each display color. The multi-color filter is made up of a light incident section, which enters from a convergence end for each display color, and regularly disperses and emits intersecting colored light.

The structure of the present invention is completely different from conventional multicolor filters, and its feature is that it takes advantage of the light guiding properties of optical fibers, and also functions as a light source and captures colored light, such as red and green.

One major feature is that the blue light is covered by a single sheet. Another feature of the present invention is that the light is introduced not from the liquid crystal panel surface as in conventional backlight systems, but from the converging end of the optical fiber.

The present invention will be described in detail.

The optical fiber used in the present invention refers to quartz-based, glass-based, plastic-based, etc. optical fibers. The optical fibers can be made into a sheet by arranging them closely in parallel on a grooved roller and bonding them with an adhesive to form a sheet, or by weaving the warp with other material such as monofilament. However, the present invention is not limited to this example.

Further, the thickness of the optical fiber may be set to correspond to each pixel of the various types of displays to be used, and is not limited to this example.

In the present invention, the dense state means, for example, A in FIGS. 1 and 2.
As shown in FIG. 2, the optical fibers are arranged in parallel and in good condition with regularity. The light emitting section refers to the side surface of the optical fiber in the present invention (7) in FIGS. 1 and 2.
), a core part of the optical fiber is completely scratched or etched by mechanical or chemical means to form a light leaking shape, and a light emitting part on the side surface is formed.

The light leaking from the side surface of the optical fiber fabric may be configured such that the optical fiber is bent depending on the diameter of the warp yarn, and the bent portion is used as the light leaking/emitting portion.

Then, on one end B of the sheet, a plurality of focusing ends (23 , (3) K-shaped bottom.And, for example, red, green to the focusing end.

Color each of the blue light sources (4), (5), (6)
-Inject. In this case, it is also possible to supply all the incident colored light with a single light source, for example by attaching a necessary wavelength filter to the converging end.

If it is necessary to increase the lighting intensity and sound, use the colored light sources (4), (5)*(6) from both ends B and C of the optical fiber sheet as shown in Fig. 1, as shown in Fig. 2. It is also possible to have a configuration in which the light is incident.

Naturally, the multicolor filter referred to in the present invention refers to electrochromic displays other than liquid crystal displays, and displays that apply electro-optical effects.

Optical shutter function for displaying the following using plasma discharge
-'N can be used as a multi-color filter for various displays.

〔Effect of the invention〕

In the present invention, in the colored display, by selecting the color to be incident on the converging end, the colored light incident from the converging end for each display color is dispersed and emitted in a regular manner due to the light guide characteristics of the optical fiber.

Since the present invention has such a configuration, it has the following effects.

(υ Color display filter effect and lighting function are possible in one sheet.

[2] Multicolor display is possible by selecting filters.

(3) There are no colored spots because the light comes from the same light source.

(4) Excellent weather resistance since no dyes or pigments are used.

(5) It is thin.

A 1illL7j multicolor filter is obtained.

The present invention will be explained by examples. Example 1 Plastic yarn optical fiber fa (Mitsubishi Rayon family, trade name;
Varnish force OK-51125 tone φ) was aligned between grooved rollers and adhered with adhesive to obtain a sheet with a width of IZ5cW1.

The sheet was cut into lengths on the 20 side, and both ends were split into single fibers, leaving a length of 5 cm. The top ends of the split optical fibers are sorted into red, green, and blue in that order.
After that, one side of the sheet excluding the separated part is honed (by sandblasting) to peel off a part of the core of the side surface of the optical fiber, and the multicolor of the present invention is produced. The obtained filter was a thin sheet with a thickness of 115 m and was incorporated into a liquid crystal display device.

Red, green, and blue color filters were all set at the above-mentioned focusing end, and a three-wavelength fluorescent lamp (6 watts) was used as a light source and entered from both ends.

The obtained fL liquid crystal display had no color spots and the lighting effect was excellent.Example 2 Using the same optical fiber as in Example 1, the fiber diameter was 1g and the fiber diameter was 1φ.
Weaving was carried out by inserting nylon monofilament into the weft threads as warp threads. Since the optical fiber has a curvature, a sheet with light leaking from the side surface of the fiber was obtained.

The same as in Example 1, both ends are separated and the top is completely red.
Sort them in the order of green, blue, red, green,
Focus on the blue color and install a color filter at the focusing end to create a multi-color filter.

[Brief Description of the Drawings] Figures 1 and 2 are schematic diagrams of two examples of the multicolor filter of the present invention. This is a filter designed to do this. In the figure, A...The friendly light emitting parts are arranged in a sheet form - B, O.
... Optical fiber sheet focusing end 1 ... - Deep focusing section 2 corresponding to red color ... Focusing section 3 corresponding to green color ... Focusing section 4 corresponding to blue color ... ... Red light source 5 ... Green light source 6 ... Blue light source

Claims (1)

[Claims] Optical fibers capable of light leakage are arranged densely in a sheet shape, and the optical fibers at one or both ends of the sheet form a plurality of optical fiber converging ends for each display color to allow light incidence for each display color. A multi-color filter that allows colored light to enter from the convergent end of optical fibers for each display color and emit light in a distributed manner from the side surfaces of an optical fiber sheet in a regular manner.