JP2771065B2 - Liquid crystal display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device for displaying one image on a plurality of liquid crystal display screens.

[0002]

2. Description of the Related Art Various types of display devices have been used. A liquid crystal display device, which is one of them, has advantages such as a significantly reduced thickness (depth) and a reduced power consumption during driving as compared with a conventionally used cathode ray tube (CRT). In recent years, it has been used in various fields.

The above-described liquid crystal display device employs a structure in which liquid crystal is filled between a pair of transparent electrodes disposed to face each other at an interval of a micron order. For this reason, if fine dust or debris is mixed or adhered in the manufacturing process, the dust or debris or the like does not function properly and so-called pixel defects are likely to occur. In addition, because of the above-described structure, when the display screen is enlarged, pixel defects are more likely to occur and the defect rate increases. The liquid crystal display device in which such a pixel defect has occurred is subjected to processing such as disposal because the display quality is greatly reduced.

Therefore, in a liquid crystal display device, when the size of the screen is increased, the defect rate due to pixel defects increases.
In particular, when the screen size is 15 inches or more, it is extremely difficult to mass-produce at an appropriate cost.

In view of this, a plurality of small liquid crystal display devices having a screen size of 15 inches or less are arranged vertically and horizontally to form a single liquid crystal display device as a whole, thereby increasing the size. FIG. 3A shows an example of such a case.
The three small liquid crystal display devices 1, 1... If this configuration is adopted, for example, if a small liquid crystal display device 1 of 14 inches is used, a large liquid crystal display device 2 of about 42 inches can be manufactured.

By the way, in each of the small liquid crystal display devices 1, as shown in FIG. 3B, there is a non-display portion 1b that does not perform display around a display screen 1a on which an image can be displayed. The non-display portion 1b is a space for forming a sealing portion for confining liquid crystal between two opposing substrates and an electrode for connecting to a wiring for applying a voltage for driving each pixel. Yes, a width dimension of at least about 3 mm is required.

For this reason, as shown in FIG. 3A, the large liquid crystal display device 2 has a grid-like non-display portion 1b between the display screens 1a, that is, the large screen is interrupted (seam). However, there is a disadvantage that display quality is lowered and display error is caused.

The applicant of the present invention has proposed a structure shown in FIG. 4 (Japanese Patent Application No. 3-293425). The proposed liquid crystal display device has liquid crystal display elements 21 and 22 arranged side by side, and each of the liquid crystal display elements 21 and 22 has the display screens 21a and 22a oriented in the same direction. One end of an optical fiber bundle 23 for image transmission is connected to the display screens 21a and 22a, which are display input surfaces. The optical fiber bundle 23 is formed by an inverted Y where one end side is branched into two on the E surface in the middle.
And one end 23a is formed on the display screen 21.
is connected to the liquid crystal display element 22 side at an angle θ ₁ with respect to a, and the other 23 b at one end side of the optical fiber bundle 23 is inclined at an angle θ ₁ toward the liquid crystal display element 21 with respect to the display screen 22 a. Connected in state.

One end 23a and the other 23b at one end of the optical fiber bundle 23 are bent at an angle θ _{1 on the} E plane and merged, and the other end merged is a display screen 21a.
It is oriented in a direction perpendicular to 22a. The other end surfaces of the optical fiber bundle 23 are arranged in a state without irregularities and are arranged at a uniform pitch to form a large screen.

[0010]

However, the proposed liquid crystal display device has three or more display screens in one direction because the optical fiber bundle is bent so as to be entirely Y-shaped. In some cases, it was difficult to respond.

The present invention has been made in order to solve the problems of the prior art, and can easily connect images on an output end face easily even if there are three or more display screens in one direction. It is an object to provide a liquid crystal display device.

[0012]

The liquid crystal display device of the present invention has three or more liquid crystal display elements in one direction, and the display screens of the liquid crystal display elements are separated from each other by having non-display portions. A liquid crystal display device having a configuration in which an input end face of an optical fiber bundle for transmitting an image is connected to the display screen, and a composite image having no joint is formed at an output end face of the optical fiber bundle. Each optical fiber bundle laminates a plurality of optical fiber sheet pieces in which a plurality of optical fibers are arranged in a row,
In addition, it is bent in the same direction in the one direction in the middle from the input end face to the output end face, and this bent portion faces the display surface.
Each of the optical fiber bundles is provided in a state where the output end faces of adjacent optical fiber bundles are in contact with each other in a straight line in a diagonal direction at a predetermined angle. Can be achieved.

[0013]

In the present invention, each optical fiber bundle is formed by laminating a plurality of optical fiber sheet pieces in which a plurality of optical fibers are arranged in a line, and in the same direction in one direction from the input end face to the output end face. are bent in a direction, the bent portion is displayed
Each optical fiber bundle is provided in a state where the output end faces of adjacent optical fiber bundles are in contact with each other in a straight line in a diagonal direction at a predetermined angle with respect to the surface. .

For this reason, by changing the bending angle in accordance with the separation distance of the display screen, the input end face of each optical fiber bundle is connected to the corresponding display screen while the output end faces are in contact with each other. It is possible to do. Also next to
The position of the bent part is shifted between the matching optical fiber sheet pieces
State. Therefore, according to the size of the display screen
A state in which the optical fiber bundles at the output end face are in continuous contact with each other.
Large size with no joints
A composite image can be formed and displayed with good quality
Becomes

[0015]

Embodiments of the present invention will be described below.

FIG. 1 is a front view showing the liquid crystal display device of this embodiment. This liquid crystal display device has two or more, for example, three liquid crystal display elements 1, 2, and 3.
The display screens 2 and 3 are separated from each other with a boundary area between the display screens 1a, 2a and 3a. The display screens 1a, 2a, and 3a separated from each other with the boundary area as described above include:
The input end faces of the optical fiber bundles 4, 5, and 6 for transmitting images are respectively connected. The optical fiber bundles 4, 5, and 6 are formed by laminating a plurality of optical fiber sheet pieces in which a plurality of optical fibers are arranged in a line, and in the same direction on the way from the input end face to the output end face toward the boundary area. The optical fiber bundles 4, 5, 5, and 6, which are bent, are fixed by bonding or the like in a state where the output end faces of the optical fiber bundles are in contact with each other. Each of the optical fiber bundles 4, 5, and 6 has exactly the same configuration.

Next, the manufacturing contents of the optical fiber bundle 4 will be described with reference to FIG. An optical fiber sheet in which a plurality of optical fibers are arranged in a line is cut into a predetermined length, and a predetermined length portion of an optical fiber sheet piece 41 is bent at an angle θ, and a plurality of light The fiber sheet pieces 41 are stacked by being inserted into a groove 7 a having an inclined bottom formed in the jig 7. At this time, the inclination of the bottom of the groove 7a is θ / θ with respect to the angle θ.
The angle is 2. The reason is that the angle formed from the direction of the diameter d to the center of the bent portion 42 (indicated by a dashed line) is half the angle θ, which is the bending angle of the output end face side with respect to the input end face side. It is. Next, the optical fiber bundle thus laminated is fixed with a resin or the like, and the input end face side and the output end face side of the fixed optical fiber bundle are cut at the positions indicated by the two-dot chain lines, respectively. Is prepared. The other optical fiber bundles 5 and 6 are manufactured in the same manner.

The bending angle θ needs to be selected such that the output end face is in contact with the adjacent optical fiber bundles 4, 5, 5 and 6, even if the input end face is connected to the display screen. By doing so, the display screens 1a, 2a
a, the optical fiber bundles 4, 5, 6
Can be brought into contact with each other.

Therefore, in this embodiment, even if the display screens 1a, 2a, 3a of the three display devices 1, 2, 3 are separated from each other, the boundary region is formed by the optical fiber bundles 4, 5, 6. It is possible to form a composite image without any. In the liquid crystal display device having such a configuration, the axial length direction of each optical fiber on the output end face side is obliquely inclined with respect to the display screens 1a, 2a, and 3a. Since there is a width of ± x, it does not matter depending on the position or direction in which the liquid crystal display device is installed.

In the above embodiment, a composite image having no boundary area is obtained by the optical fiber bundles 4, 5, and 6 for three liquid crystal display elements arranged in one direction.
Since the present invention joins a plurality of optical fiber bundles as described above, the present invention can be similarly applied even when the display screens of the liquid crystal display element are infinitely arranged in one direction.

Further, in the above-described method of manufacturing an optical fiber bundle, the optical fiber sheet pieces 41 each having a single bent portion are laminated, but the present invention is not limited to this. Alternatively, the optical fiber sheet pieces may be folded in the state of a laminated body.

[0022]

According to the present invention, a plurality of laminated light
When the fiber sheet piece is on the way from the input end to the output end
It is bent in the same direction in one direction, and the bent part
Lined up in a straight line at a predetermined angle to the display surface
Take the configuration. For this reason, the bending angle is determined by the distance between the display screens.
The output end faces can be connected to each other by changing
Touch the input end face of each fiber optic bundle
It can be connected to each display screen. Also, the adjacent light
The position of the bent part is shifted between the fiber sheet pieces
Can be. As a result, output according to the size of the display screen
With the optical fiber bundles at the end faces in continuous contact with each other
A plurality of display elements can be arranged. Even if three or more display elements are arranged in one direction, a large
A composite image of a mold can be formed, and a high-quality image can be obtained. Also, each optical fiber constituting the optical fiber bundle
The same bending angle and number of bending
Of each optical fiber at the input end and output end
Since the direction is fixed, the bent part of each optical fiber
And the same optical loss,
The viewing angle can be kept constant. As a result, the light amount unevenness of the output image
Large composite images without seams.
It is possible to display with good quality.

[Brief description of the drawings]

FIG. 1 is a plan view showing a liquid crystal display device of the present embodiment.

FIG. 2 is an explanatory diagram of the production contents of an optical fiber bundle used in the liquid crystal display device of FIG.

FIG. 3A is a front view showing a plurality of display screens provided in a conventional liquid crystal display device, and FIG. 3B is a front view showing one of the display screens.

FIG. 4 is a plan view showing a liquid crystal display device previously proposed by the present applicant.

[Explanation of symbols]

 1, 2, 3 Liquid crystal display element 1a, 2a, 3a Display screen 4, 5, 6 Optical fiber bundle

──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Keiji Sakai 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Yoshio Yoshida 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Sharp In-company (72) Inventor Takahiro Miyake 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-60-247222 (JP, A) (58) Fields investigated (Int. . ^6, DB name) G02F 1/1347 G02F 1/1335 G02B 6/06 G02B 6/08

Claims (1)

(57) [Claims] 1. A liquid crystal display having three or more liquid crystal display elements in one direction,
The respective display screens of the liquid crystal display element are separated from each other with a non-display portion, and an input end face of an optical fiber bundle for transmitting an image to the display screen is connected to an output end face of the optical fiber bundle. A liquid crystal display device configured to form a composite image having no seams at each, wherein each optical fiber bundle is formed by laminating a plurality of optical fiber sheet pieces in which a plurality of optical fibers are arranged in a line, and outputting from an input end face. It is bent in the same direction in the one direction on the way to the end face, and this bent part is inclined at a predetermined angle to the display surface.
Consist structure arranged in a straight line in the direction, a liquid crystal display device in which each optical fiber bundle in a state in which the output end face side is brought into contact with each other of the optical fiber bundle to each other are provided adjacent.