JPH0553022A - Display device - Google Patents

Abstract

PURPOSE:To provide the device which is small in size and low in cost, and also, whose operation service life is long. CONSTITUTION:In an optical fiber block 1, one end face of many optical fibers 2 is placed two-dimensionally by using a prescribed spacer, etc., and the display surface 3 is formed. These optical fibers 2 are divided alternately on every other piece in the horizontal direction. Subsequently, one pair (2G) which are not arranged straight alternately in the vertical direction, in those which are divided on every other piece of these optical fibers 2 are collected. Also, the remaining optical fibers 2 are divided (2R, 2B) alternately in the vertical direction and collected. Moreover, the other end face of the optical fibers 2 divided into three pairs (R, G, B) and drawn out is placed by the same array as the display surface 3, respectively and incident faces 4R, 4G and 4B are formed. This device is provided with cathode ray tubes 5R, 5G and 5B for executing a monochromatic display of red, green and blue, respectively with respect to these incident faces 4R, 4G and 4B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for enlarging and displaying an image by using an optical fiber.

[0002]

2. Description of the Related Art A display device has been proposed which enlarges and displays an image by using an optical fiber. That is, in FIG. 7, 71 is an optical fiber block. In this optical fiber block 71, one end surface of a large number of optical fibers 72 is two-dimensionally arranged using a predetermined spacer or the like to form a display surface 73. The other end surface of the optical fiber 72 is arranged in the same arrangement as the display surface 73 to form an incident surface 74. The incident surface 74 is arranged such that the other end surfaces of the optical fibers 72 are in close contact with each other without using a spacer or the like. As a result, the image light incident on the incident surface 74 is enlarged and displayed on the display surface 73.

Conventionally, a liquid crystal projector as shown in the figure has been used as a device for making image light incident on the incident surface 74 of the optical fiber block 71. That is, 81 in the figure is a metal halide lamp. The light from this metal halide lamp 81 is reflected by the reflector 8.
The parallel light rays are converted into parallel light rays at 2 and are incident on the blue dichroic mirror 84 via the cold mirror 83. The light beam reflected by the blue dichroic mirror 84 is reflected by the mirror 85 and enters the liquid crystal display 86 to which the blue video signal is supplied.

The light beam transmitted through the blue dichroic mirror 84 is incident on the red dichroic mirror 87. The light beam reflected by the red dichroic mirror 87 is incident on the liquid crystal display 88 to which the red image signal is supplied. Further, the light beam transmitted through the red dichroic mirror 87 is incident on the liquid crystal display 89 to which the green image signal is supplied.

The image light from the liquid crystal display 86 to which the blue image signal is supplied and the image light from the liquid crystal display 88 to which the red image signal is supplied are incident on the red dichroic mirror 90 and are combined. The combined image light and the image light from the liquid crystal display 89, to which the green image signal is supplied, reflected by the mirror 91 are incident on the green dichroic mirror 92 and are combined. The combined color (blue, red, green) image light is incident on the incident surface 74 of the optical fiber block 71 through the projection lens 93.

Thus, for example, so-called 5-inch liquid crystal displays 86, 88, 89 (vertical about 7.62c)
m) can be used to obtain a display of about 48 cm vertical. When actually used, a plurality of the devices are combined vertically and horizontally, and divided image signals are supplied to the liquid crystal displays 86, 88 and 89, respectively, for large-scale display. Is.

However, in this apparatus, when the liquid crystal projector is used as a device for making the image light incident, the operating life of the metal halide lamp 81 in this liquid crystal projector is only 1000 to 2000 hours. Therefore, in the display device used continuously, it is necessary to frequently replace the metal halide lamp 81. In such replacement of the metal halide lamp 81, it is necessary to adjust the color temperature and the like every time, and particularly when a plurality of devices are combined, it is extremely difficult to adjust the devices.

On the other hand, long life (10,000 to 20,000 hours)
It is conceivable to use a projector with a color cathode ray tube. However, the color cathode ray tube emits a small amount of light, and the screen needs to be doubled to obtain the same display. For this reason, the required projection lens and the like also become large and the price thereof becomes expensive. In addition, it is difficult to display a large size by combining a plurality of devices.

[0009]

A problem to be solved is that a conventional liquid crystal projector has a short operating life, and a projector using a color cathode ray tube has a large size and a high price.

[0010]

According to the present invention, one end surface of a large number of optical fibers 2 is arranged two-dimensionally and a display surface 3 is formed.
And the optical fibers are at least alternately divided in the two-dimensionally arranged state (2G,
2R, 2B) and the other end surface of the optical fiber is arranged in the same arrangement as the display surface (incident surface 4R, 4G, 4B) for each of the divided parts, and the other end surface of the arranged optical fiber is arranged. This is a display device in which the image light from the monochromatic cathode ray tubes 5R, 5G, and 5B, which are different for each of the above-mentioned divided ones, is incident on the end face.

[0011]

According to this, since a monochromatic cathode ray tube is used, a small size and sufficient light emission can be obtained, and the operation life can be extended.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is an optical fiber block. In this optical fiber block 1, one end surface of a large number of optical fibers 2 is two-dimensionally arranged using a predetermined spacer or the like to form a display surface 3. The optical fibers 2 are divided in the horizontal direction alternately every other fiber. Further, one set (2G) of the optical fibers 2 which are not arranged in a straight line in the vertical direction out of every other one of the optical fibers 2 is collected. In addition, the remaining optical fibers 2 are alternately divided in the vertical direction (2R, 2B) and collected, and three groups (R, G,
It is divided into B) and pulled out.

Further, the other end faces of the optical fibers 2 divided into three sets (R, G, B) and drawn out are arranged in the same arrangement as that of the display face 3, respectively, and incident faces 4R, 4G, 4B.
Is formed. The incident surfaces 4R, 4G, and 4B are arranged such that the other end surfaces of the optical fiber 2 are in close contact with each other without using a spacer or the like. As a result, the incident surfaces 4R, 4G,
The image light incident on 4B is magnified, and the display surface 3
It is synthesized and displayed above.

Cathode ray tubes 5R, 5G and 5B for displaying monochromatic colors of red, green and blue are provided on the incident surfaces 4R, 4G and 4B of the optical fiber block 1 as described above. Red, green and blue video signals are supplied to the cathode ray tubes 5R, 5G and 5B, respectively. The image lights of the respective colors from the cathode ray tubes 5R, 5G and 5B are incident on the incident surfaces 4R, 4G and 4B of the optical fiber block 1 through the projection lenses 6R, 6G and 6B, respectively.
Therefore, in this device, each cathode ray tube 5R, 5G, 5B
The red, green, and blue image lights from are expanded,
The combined color image is enlarged and displayed on the display surface 3.

In this case, since the cathode ray tube is used as a device for making the image light incident, the operating life is about 10,000 to 20,000 hours, which is a long life. Since this cathode ray tube is monochromatic, it emits a large amount of light. For example, so-called 5 inch cathode ray tubes 5R, 5G, and 5B (vertical about 7.62).
cm) can be used to obtain an amount of emission sufficient for a display of about 48 cm in the vertical direction. Projection lens 6 required for this
R, 6G, 6B, etc. will also be smaller, and the price will be lower. Further, it is possible to easily realize a large display by combining a plurality of devices.

Thus, according to the above-mentioned device, since the monochromatic cathode ray tubes 5R, 5G, and 5B are used, a small size (so-called 5 inches, vertical about 7.62 cm) can obtain sufficient light emission, and the operating life is long ( 10,000 to 20,000 hours).

Further, the optical fiber block 1 is produced by the above-mentioned apparatus as follows. That is, FIG.
In the above, reference numeral 21 is a spacer sheet forming one horizontal line, and the spacer sheet 21 has a thickness of, for example, 2 mm. On one surface of this spacer sheet 21, for example, 2
Grooves 22 are formed at intervals of mm, and one end surface of the optical fiber 2 having a diameter of 0.5 mm is fixed to the groove 22. Further, these optical fibers 2 are divided in the horizontal direction alternately every other fiber. A spacer sheet 21 on which one end surface of the optical fiber 2 is arranged is laminated in the groove 22. Then, one set (2G) which is not arranged in a straight line in the vertical direction, which is divided every other optical fiber 2, is collected. The remaining optical fibers 2 are alternately divided in the vertical direction (2R, 2B) and collected, and the whole is divided into three sets (R, G, B) and extracted. As a result, the cathode ray tubes 5R, 5G of the respective colors R, G, B are displayed on the display surface 3.
The optical fibers 2 corresponding to 5B are arranged as shown in FIG. 3, and excellent red, green, and blue image lights are combined.

Alternatively, as shown in FIG. 4, grooves 22a are formed on one surface of the above-mentioned spacer sheet 21 at intervals of, for example, 4 mm, and grooves 22b are formed on the other surface between the grooves 22a. One end surface of the optical fiber 2G is fixed to the groove 22a, and one end surface of the optical fiber 2R or 2B is fixed to the groove 22b while the optical fiber 2G is collected, and the optical fiber 2R or 2B is collected. One end surface of the optical fiber 2G is fixed to the groove 22a, one end surface of the optical fiber 2R is fixed to the groove 22b, and one end surface of the optical fiber 2G is fixed to the groove 22a, and the optical fiber 2B is fixed to the groove 22b. The spacer sheet 21B having one end surface fixed thereto is alternately inverted and laminated. As a result, the cathode ray tubes 5R, 5G of the respective colors R, G, B are displayed on the display surface 3.
The optical fibers 2 corresponding to 5B are arranged as shown in FIG. 5, and favorable red, green, and blue image lights are combined. According to this example, since the optical fiber 2G and the optical fiber 2R or 2B are separated from each other on the front and back of the spacer sheet 21, the separation can be performed easily and accurately.

In the production of the optical fiber block 1, it may be considered that each of the above-mentioned spacer sheets 21 corresponds to each color R, G, B. However, in that case, in order to arrange the colors at equal intervals in the horizontal and vertical directions, the interval between the colors R, G, and B becomes 6 mm as shown in FIG. 6, resulting in an extremely rough display.

In the above-mentioned device, the optical fiber 2
R and 2B are designed to form one incident surface 4R / B without being separated from each other, and the incident surface 4R / B from the two-color index cathode ray tube 5R / B which is small in size and has a large emission amount can be obtained. Image light may be incident. Further, since the optical fiber 2 can be bent arbitrarily, the cathode ray tubes 5R, 5G, and 5B can be arranged, for example, on the same side on the left and right to facilitate adjustment and the like.

[0021]

According to the present invention, since a monochromatic cathode ray tube is used, it is possible to obtain a small size and sufficient light emission, and it is possible to extend the operating life.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an example of a display device according to the present invention.

FIG. 2 is a diagram for explaining an example of a method for producing the optical fiber block 1.

FIG. 3 is a diagram showing a display surface 4 thereof.

FIG. 4 is a diagram for explaining another example of the method for producing the optical fiber block 1.

FIG. 5 is a diagram showing the display surface 4.

FIG. 6 is a diagram showing another display surface 4.

FIG. 7 is a configuration diagram of a conventional display device.

[Explanation of symbols]

 1 Optical fiber block 2, 2G, 2R, 2B Optical fiber 3 Display surface 4R, 4G, 4B Incident surface 5R, 5G, 5B Cathode ray tube 6R, 6G, 6B Projection lens

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideaki Nakagawa 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (1)

[Claims] 1. An end face of a large number of optical fibers is two-dimensionally arranged to form a display surface, and the optical fibers are at least alternately divided in the two-dimensionally arranged state and drawn out. The other end face of the optical fiber is arranged in the same arrangement as the display surface for each of the divided ones, and from the monochromatic cathode ray tube different for each of the divided ones with respect to the other end face of the arranged optical fiber. A display device that allows the image light of.