JPH0934382A - Method and device for manufacturing video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To laminate optical fibers in parallel without crossing by arraying optical fibers, lead in a couple of gates at an interval a little larger than the diameter of the optical fibers, in a line and then putting them in contact with each other. SOLUTION: Many optical fibers 12 are arranged having their axes almost in parallel and led in couples of gates 18, 18' and 19, 19' at intervals a little larger than the diameter of the optical fiber 12, so that adjacent optical fibers 12 are arrayed in a line. The positions and order of the optical fibers corresponding to an incidence surface and a projection surface can be held accurately in 1:1 correspondence relation. Then adjacent optical fibers 12 are brought into contact from both the sides of the arrayed optical fibers 12 by contacting means 22, 22' and 23, 23', so such trouble that some optical fiber runs over other fibers is prevented and the optical fibers 12 can be brought into contact with each other while the correspondence relation is secured. Further, the optical fibers can be arrayed closely in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an image display device and an apparatus for manufacturing the same, and more specifically, it relates to an incident surface formed by a plurality of optical fibers in close contact with each other, and an optical fiber. The present invention relates to a method and an apparatus for manufacturing an image display device having an emission surface formed by enlarging a space to a predetermined pitch.

[0002]

2. Description of the Related Art In recent years, display devices using optical fibers have begun to be used, and in such display devices, so-called crossing occurs in which the positions of the optical fibers on the entrance surface and the exit surface do not have a one-to-one correspondence. If some crossing occurs, the information on the entrance surface will not be accurately transmitted to the exit surface,
The display quality will be significantly reduced. In addition, it is necessary to stack a large number of optical fibers vertically and horizontally on the entrance surface, and it is necessary to stack the optical fibers as close together as possible in order to increase the incidence efficiency. Method and apparatus therefor
Japanese Patent Laid-Open No. 271284 and Japanese Patent Laid-Open No. 63-314590 have been proposed.

In the method disclosed in Japanese Patent Laid-Open No. 63-271284, a plurality of optical fibers are positioned by a guide plate in which a plurality of holes are formed at a pitch larger than the diameter of the optical fiber, and the space between the guide plates is set. In this method, a plurality of optical fibers are narrowed down by using a comb tooth or the like, the plurality of optical fibers are cut at a time in the narrowed portion to obtain an optical fiber sheet, and the optical fiber sheets are laminated.

The device disclosed in Japanese Patent Laid-Open No. 63-314590 positions a plurality of optical fibers by a guide plate having a plurality of holes formed at a pitch larger than the diameter of the optical fibers, and in this state a plurality of optical fibers are positioned. The optical fibers are collectively cut, and then one end of each of the plurality of optical fibers is bundled with a metal foil tape and brought into close contact with each other to obtain an optical fiber sheet, and the optical fiber sheets are laminated.

[0005]

However, in any case, when the optical fibers are narrowed down or bundled to bring them into close contact with each other, there is a possibility that the optical fibers intersect each other. Further, there is no guarantee that the optical fibers brought into close contact with each other are aligned on one plane, and a considerable step may occur between the optical fibers. Therefore, even if the optical fiber sheets are vertically stacked in such a state that there is a step, it is almost impossible to obtain a state in which the optical fibers are densely stacked in the vertical direction. The incidence efficiency of is reduced. As a result, the display on the display device becomes dark. Also,
The inconvenience that the display becomes dark does not occur uniformly in the entire display range but occurs locally and irregularly, so that the display quality as a whole is impaired. That is, it is difficult to stack a large number of optical fibers densely not only in the horizontal direction but also in the vertical direction and parallel to each other without crossing, and the display quality of the display device deteriorates.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is capable of densely stacking a large number of optical fibers in parallel without crossing and manufacturing a video display device having a simple structure. An object is to provide a method and an apparatus for manufacturing the same.

[0007]

According to a first aspect of the present invention, there is provided a method of manufacturing an image display device, which comprises, as a method of forming an image incident surface, a step of aligning a plurality of optical fibers with their axes substantially parallel to each other. Aligning adjacent optical fibers in a line by drawing them into a pair of gates having a spacing slightly larger than the diameter of the optical fibers; and adhering the adjacent optical fibers to each other by means of a contact means from both sides of the aligned optical fibers. And a step of bringing them into close contact with each other.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing an image display device, which has a space slightly larger than the diameter of the optical fibers, and a pair of aligning means for aligning a plurality of optical fibers for one row within the space. , A contact means for contacting a plurality of optical fibers of one row aligned by the aligning means with each other.

[0009]

According to the method of manufacturing the image display device of claim 1,
Align the axes of a number of optical fibers substantially parallel to each other, and closely arrange the optical fibers on one end side to form an incident surface of the image, and enlarge the intervals of the optical fibers on the other end side to a predetermined pitch. In manufacturing an image display device that forms an image emission surface, a plurality of optical fibers are aligned with their axes substantially parallel to each other, and a pair of gates having these optical fibers spaced slightly larger than the diameter of the optical fibers. Since the adjacent optical fibers are aligned in a line by pulling in, the position and order of the optical fibers corresponding to the incident surface and the position and order of the optical fibers corresponding to the exit surface correspond exactly to one to one. Can hold in a relationship. Then, since the adjacent optical fibers are brought into close contact with each other by the contact means from both sides of the aligned optical fibers, it is possible to prevent the inconvenience that one of the optical fibers crosses over the other optical fiber and to secure the above correspondence. The optical fibers can be brought into close contact with each other as they are. Furthermore, in stacking the optical fibers in the vertical direction, since there is no step between the optical fibers adjacent in the horizontal direction, the arrangement of the optical fibers in the vertical direction can be made dense. As a result, it is possible to obtain a video display device which has a simple structure, does not cause intersections, and can achieve high-quality display without uneven brightness.

According to another aspect of the image display device manufacturing apparatus of the present invention, a plurality of optical fibers are formed so as to be in close contact with each other, and an interval between the optical fibers is enlarged to a predetermined pitch. In the production of the image display device having the light emitting surface, the optical fibers for one row are aligned by the pair of aligning means having an interval slightly larger than the diameter of the optical fiber, and therefore, they correspond to the incident surface. The position and order of the optical fibers and the position and order of the optical fibers corresponding to the emission surface are held in exactly one-to-one correspondence. In this state, if a pressing force is applied to the optical fibers by the adhesion means so as to bring them into close contact with each other, it is possible to prevent the inconvenience that one of the optical fibers gets over another optical fiber. The fibers can be closely attached. Further, in stacking the optical fibers in the vertical direction, since there is no step between the optical fibers adjacent in the horizontal direction, the arrangement of the optical fibers in the vertical direction can be made dense. As a result, it is possible to obtain a video display device which has a simple structure, does not cause intersections, and can achieve high-quality display without uneven brightness.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is a perspective view schematically showing the overall construction of the image display device manufacturing apparatus of the present invention, and FIG. 2 is an enlarged view of the main parts. This manufacturing apparatus includes a large number of bobbins 11 arranged vertically and horizontally and a large number of guide pins 1.
5, a first sheet plate A1 having a large number of grooves 17 on the upper surface, a second guide plate 16 having a large number of guide pins 16 ', and first yarn pulling pins 22, 22.
′ (Corresponding to the contact means) and the first gates 18, 18 ′
(Corresponding to the aligning means), and the second gates 19 and 19 '.
(Corresponding to the aligning means) and the second yarn pulling pins 23, 23.
'(Corresponding to the contact means) and a large number of guide pins 20'
And a first sheet plate B1 having a large number of grooves 21 on its upper surface, and a clamp 13 that can travel to grip the tip of the optical fiber 12 and pull it out of the bobbin 11. . The number of bobbins 11, the number of gaps formed by the guide pins, and the number of grooves correspond to the number of optical fibers 12 for one row.

FIG. 6 is a schematic front view showing the first gates 18, 18 'and the corresponding drive mechanism. The first gates 18 and 18 'are fixed to the frames 28 and 28', respectively. This frame 28 has a pair of vertical axes 29, 29.
′, The vertical shafts 29, 29 ′ are engaged with the body frames 37, 37 ′ via bearings 33, 33 ′, and the frame 28 and the vertical shafts 29, 29 ′ are It can slide up and down with respect to 37, 37 '. The frame 28 'is engaged with the vertical shafts 29, 29' via bearings 33, 33 'and can slide up and down with respect to the body frames 37, 37'. Body frame 37, 37
′ And the frame 28, the vertical axis 29,
29 'is provided with compression springs 32, 32', and the frame 2
8'and a frame 28 "(frame provided integrally with the frame 28 and located below the frame 28 ')
An elevating device 34 is provided between and, and by operating the elevating device 34, the interval between the frames 28, 28 'can be changed to open and close the first gates 18, 18'. Further, the stoppers 35, 35 'and the stoppers 36, 36 are provided at predetermined positions on the gate mounting surface of the frames 28, 28'.
'Is provided respectively. Stoppers 35, 35 '
One of the stoppers 36 and 36 'can adjust the height, and the other cannot adjust the height. Then, by adjusting the height of one of the stoppers, it is possible to adjust the gate interval when the first gates 18 and 18 'are closed.
It is easy to deal with changes in the diameter of the.

In the case of adopting the above structure, if the elevating device 34 is operated to raise the frame 28 ', the frame 28' is raised until the predetermined position of the frame 28 'comes into contact with the main body frame 37. . Lifting device 34 after that
If the above operation is continued, the frame 28 descends while compressing the compression springs 32, 32 '. Then, the stopper 35,
When both 35 'come into contact with the stoppers 36, 36', the lowering of the frame 28 is stopped. At this time, the distance between the first gates 18 and 18 'becomes the predetermined distance set by the stopper. Further, the contact between the stoppers is detected by a sensor (not shown), and the lifting device 34 is stopped. However, instead of using the compression springs 32, 32 ', an elevating device for elevating the frame 28 may be provided.

Further, by performing the operation reverse to the above, the distance between the first gates 18 and 18 'can be increased so that the clamp 13 can pass through. In this case, it is preferable to detect the passage of the clamp 13 by a sensor (not shown) and operate the elevating device 34 to reduce the distance between the first gates 18 and 18 '. The operation of the manufacturing apparatus configured as described above is as follows.

From each bobbin 11 to each optical fiber 12
The end portion of is pulled out and held by the clamp 13. In addition, the first gates 18 and 18 'and the second gates 19 and 19
′ And ′ are separated from each other to allow passage of the clamp 13. In this state, the clamp 13 is moved in the direction away from the bobbin 11 to draw out the optical fiber 12,
First, it is inserted between the guide pins 15 of the first guide plate 14 respectively, and then the guide pins 16 of the second guide plate 16 are inserted.
′, And then insert into the groove 17 of the seat plate A1.
To house each. After that, while further moving the clamp 13 to pull out the optical fiber 12,
The optical fiber 12 has a space between the first yarn pulling pins 22 and 22 ', a space between the first gates 18 and 18', and a second gate 1.
The space between 9 and 19 'and the space between the second yarn pulling pins 23 and 23' are passed in this order, and are respectively inserted between the guide pins 20 'of the third guide plate 20, and then the seat plate B1.
The grooves 21 are respectively accommodated. After that, the first gate 1
The optical fibers 12 are aligned by moving 8 and 18 ′ toward each other and moving the second gates 19 and 19 ′ toward each other so that the distance between them is slightly larger than the diameter of the optical fiber. Let That is,
When the plurality of optical fibers 12 are aligned, the distance between the first gates 18 and 18 ',
The interval between the gates 19 and 19 'is set (see FIG. 3).

Next, the first yarn pulling pins 22 and 22 'are brought close to each other, and the second yarn pulling pins 23 and 23' are brought together.
The optical fibers 12 that are brought close to each other and are aligned by the first gates 18 and 18 'and the second gates 19 and 19'.
Are brought close to the center so that they touch each other (see FIGS. 4 and 5). Then, at a predetermined position C indicated by a chain line in FIG. 4, the closely aligned optical fibers 12 are temporarily fixed with a tape or the like (not shown), and the optical fiber 12 is cut together with the tape or the like at the central portion of the tape or the like. Further, the optical fiber 12 is attached to the sheet plate A by providing a tape or the like (not shown) on the upper surfaces of the sheet plates A1 and B1 almost at the same time.
1, B1 are temporarily fixed, and the optical fiber 12 is cut at predetermined positions L1 and L2 outside the sheet plates A1 and B1.

By carrying out the series of processes described above, it is possible to obtain an optical fiber sheet in which the incident surface sides of the optical fibers 12 for one row are integrated into a sheet shape. The portions of the first guide plate pin 15, the second guide plate pin 16 and the first gates 18, 18 ', and the second gates 19, 19' that come into contact with the optical fiber 12 are coated with Teflon to prevent friction with the optical fiber. It is desirable to reduce the coefficient and take measures to prevent scratching of the optical fiber. Similarly, it is desirable that the first yarn pulling pins 22 and 22 'and the second yarn pulling pins 23 and 23' be made of Teflon coat or rotating pins to reduce the friction coefficient with the optical fiber 12. Further, although the yarn pulling pins are two pairs in this embodiment, they are not necessarily one pair, and for example, four pairs, two pairs, six pairs and three pairs, and the two converging portions of the optical fiber 12 are provided. It is also possible to separately focus the light on three locations and to match the light on one focus surface before final lamination.

Since a large number of optical fiber sheets can be obtained by repeating the above-described series of processes, after the required number of optical fiber sheets have been obtained, the incident surface side portions of these optical fiber sheets are removed. By vertically stacking and integrating them, an optical fiber block forming a main part of the image display device can be obtained. In the above, the case where the aligned and closely adhered optical fibers are stacked directly on top of each other has been described. However, when the tolerance of the optical fibers is large, a large number of grooves having the maximum diameter of the optical fibers as the pitch are provided. It is preferable that the width of the entire optical fiber of each stage is made uniform by a jig.

[0019]

According to the first and second aspects of the present invention, it is possible to obtain a video display device which has a simple structure, does not cause crossing, and can achieve high-quality display without uneven brightness. Has a unique effect.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an overall configuration of a manufacturing apparatus for an image display device according to the present invention.

FIG. 2 is an enlarged view of a main part of the above.

FIG. 3 is a schematic side view illustrating an optical fiber alignment state.

FIG. 4 is a schematic perspective view showing a state in which optical fibers are aligned and closely attached.

FIG. 5 is a schematic front view showing an optical fiber aligned and adhered state.

FIG. 6 is a schematic front view showing a first gate, a corresponding drive mechanism, and the like.

[Explanation of symbols]

12 optical fiber 18,18 'first gate 19,19' second gate 22,22 'first yarn pulling pin 23,23' second yarn pulling pin

Claims (2)

[Claims] 1. A plurality of optical fibers (12) are aligned with their axes substantially parallel to each other, and the optical fibers (12) on one end side are closely arranged to form an incident surface of an image, and light on the other end side is formed. In a method of manufacturing an image display device, in which an interval between fibers (12) is enlarged and arranged at a predetermined pitch to form an image emission surface, the method of forming an image incident surface is performed by using a large number of optical fibers (1
2) Aligning the axes of the optical fibers substantially parallel to each other, and a pair of gates (18) (18 ') having an interval between these optical fibers (12) slightly larger than the diameter of the optical fibers (12).
(19) A step of aligning adjacent optical fibers (12) in a line by pulling them into the inside of (19 ′), and a contact means (22) (22 ′) from both sides of the aligned optical fibers.
(23) Optical fiber (12) adjacent by (23 ')
A method of manufacturing an image display device, comprising the step of bringing them into close contact with each other. 2. An optical fiber (12) having an incident surface formed by a plurality of optical fibers (12) so as to be in close contact with each other.
A device for manufacturing an image display device having an emission surface formed by enlarging the intervals between them by a predetermined pitch, and having an interval slightly larger than the diameter of the optical fiber (12) within the interval. A pair of aligning means (18) (18 ') (19) for aligning a plurality of optical fibers (12) for one row
(19 ') and alignment means (18) (18') (19)
Adhering means (22) (22) for adhering a plurality of optical fibers (12) arranged in a row by (19 ') to each other.
') (23) (23') is included, The manufacturing apparatus of the image display apparatus characterized by the above-mentioned.