JP2019139136A - Optical fiber having video compensation function - Google Patents

Abstract

SOLUTION: There is provided an optical fiber having a video compensation function that is an optical member configured by disposing and coupling a plurality of optical fibers in the same direction, where the optical member is composed of an output end face, an input end face, and a side adjacent surface, the output end face is composed by assembling sections at one end of the optical fibers, the sections show a square or a regular polygon each, the input end face is composed by assembling sections at the other end of the optical fibers, the sections show precisely noncircular shapes or irregular polygons, and the side adjacent surface and the optical fibers extend in the same direction.EFFECT: With the above configuration, a user can allow video displayed on both surfaces to maintain scheduled brightness when viewing from a front face and a side face.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical fiber, and in particular, an output end surface is configured to be cut so as to be perpendicular to the axial direction of the optical fiber, a plurality of optical fibers have a cross section of a regular circle or a regular polygon, and an input end surface is an optical fiber. Image compensation with a constant brightness even when viewed from the front or side, because the cross section of multiple optical fibers has a non-circular or non-polygonal shape, and is cut to be inclined in the axial direction. It relates to optical fibers with functions.

  FIG. 13 and FIG. 14 are diagrams showing a conventional method for producing an optical fiber and specific application of the first embodiment. First, as shown in FIG. 13, after compressing the plurality of optical fibers 501 by applying pressure, the optical member 50 having a triangular rod shape is formed by cutting the optical fibers 501 as shown in FIG. The optical member 50 has an output end face 51, an input end face 52, and a side adjacent face 53. Since the side adjacent surface 53 and the input end surface 52 are pressed, after the input end surface 52 is compressed, the cross section of the opening of these optical fibers 501 inside is reduced. Since the input end face 52 is cut so as to be perpendicular to the axial direction of the optical fiber 501, the cross section has a circular shape or a polygonal shape with different densities. Since the output end face 51 is cut so as to be inclined in the axial direction of the optical fiber 501, the cross section of the opening of these optical fibers 501 has a cross section cut obliquely.

  FIG. 15 is an enlarged view showing the optical member 50 before being cut into a triangular rod shape. The side adjacent surface 53 of the optical member 50 is pressed. The output end face 51 is cut obliquely to form the longest side of the triangle of the optical member 50. The cross section of the optical fiber 501 constituting the output end face 51 is formed by being cut obliquely. The input end face 52 is cut and formed so as to be perpendicular to the axial direction of the optical fiber 501.

  FIG. 16 is a diagram showing the structure of the optical fiber 501. Since the light exit end of the optical fiber 501 is a cross section cut obliquely, the light beam exits from the light output end and then refracts and travels to the end cut obliquely. The rays are darker.

  Refer to FIG. On the surfaces of the two display devices 60 to be joined to each other, these optical members 50 are provided so as to be symmetrical left and right. The location where the upper ends of these optical members 50 are coupled is located directly above the location where these display devices 60 are joined. The images from these display devices 60 can avoid the generation of a tomography due to the refraction of these optical members 50. When the user views from the point H in FIG. 17, the brightness of the image from the display device 60 is maintained and the image is displayed well, but when viewed from the point I, the image is viewed from the front of the point H. Compared with the case, the part where these display devices 60 are joined is darker, and the image is not displayed well.

  18 and 19 are diagrams showing another embodiment of the conventional optical member 70. FIG. The optical member 70 is provided at a location where a plurality of display devices 80 are joined. On both sides of the optical member 70, end sides 71 that are parallel to each other and that form a straight line are provided. In other words, since the side does not have a light guide by an optical fiber, when the user views from the K point, the image cannot be viewed.

  FIG. 20 is a cross-sectional view showing an optical member 70 composed of a plurality of first optical fibers 701 and a plurality of second optical fibers 702. A resin support structure 72 that supports these first optical fibers 701 and affixes them to these first optical fibers 701 is provided at the center stage of the optical member 70. The shape of these first optical fibers 701 approximates the shape of the surface of the resin support structure 72. These second optical fibers 702 are separated from the resin support structure 72. When the user views from point J, the video cannot be viewed due to the influence of one of the edges 71.

  FIG. 21 is a cross-sectional view showing the first optical fiber 701. The radial length D1 of the opening at the top of the first optical fiber 701 is longer than the radial length D2 of the opening at the bottom of the first optical fiber 701. FIG. 22 is a diagram showing that the radial length of the upper opening of the second optical fiber 702 is the same as the radial length of the bottom opening. Thereby, the image refracted by the display device 80 is enlarged when passing through these first optical fibers 701 and does not change when passing through these second optical fibers 702.

  In order to solve the problem that the display of the image is affected by these end sides 71 in FIG. 18, a manufacturer has proposed an optical member 90 having a quadrilateral shape shown in FIG. The optical member 90 solves the problem that an image cannot be displayed by directly cutting the original end side obliquely to form the hypotenuse 91. However, the plurality of optical fibers 92 constituting the hypotenuse 91 are shown in FIG. In addition, when light is refracted on the oblique section of the optical fiber 92 and the user views from the N point (or L point), the image is bright, but when viewed from the O point (or M point). Since the image is darker, there is a difference in the brightness of the image.

  The main object of the present invention is such that the output end face is cut so as to be perpendicular to the axial direction of the optical fiber, the cross section of the plurality of optical fibers has a regular circle or a regular polygon, and the input end face is the axis of the optical fiber. Image compensation function that is configured to be cut in a slanting direction, and the brightness of the image is constant even when viewed from the front or side, as the cross section of multiple optical fibers presents a non-circular or non-regular polygon It is to provide an attached optical fiber.

According to the optical fiber with an image compensation function of the present invention, the optical member includes an optical member in which a plurality of optical fibers are arranged and coupled in the same direction, and each of these optical fibers includes a core and a skin, and the refractive index of the core is 1 The refractive index of the skin is 1.39 to 1.53, and the exit aperture angle of these optical fibers is larger than 11.5 °, and the cross section of the optical member is divided into the output end face and the input end face. It is composed of an end face and a side adjacent face,
The output end face is formed by concentrating the cross sections of one end of these optical fibers, and the cross-sectional shape is a regular circle or a regular polygon, and the cross section of the output end face is not subjected to external force, so the cross-section density is the same. And
The input end face is formed by collecting the cross sections of the other ends of these optical fibers. The shape of the cross section corresponds to the shape of the cross section of these optical fibers of the output end face, and the input end face receives an external force. As the density continuously decreases to the side adjacent surface and is cut obliquely, the cross-sectional shape exhibits a non-circular or non-polygonal shape, and the bevel cross-sectional angle of these optical fibers constituting the input end surface is Continuously decreasing to the side adjacent surface, the angle is 1 ° to 65 °, preferably 3 ° to 55 °,
The side adjacent surface extends in the same direction as these optical fibers, the angle formed between the side adjacent surface and the input end surface is an obtuse angle, the angle formed between the side adjacent surface and the output end surface is the first acute angle, and the input end surface and output The angle formed with the end face is the second acute angle, the first acute angle is 5 ° to 85 °, preferably 8 ° to 75 °, and the second acute angle is 1 ° to 50 °, 3 It is preferable that the angle is from 35 to 35 °.

  According to the optical fiber with a video compensation function of the present invention, the two optical members are provided symmetrically at the knots of the two display devices, and any one of the optical members is cut into a shape approximating a triangular rod. The output end face, the input end face, the side adjacent face, and the two contact faces that come into contact with the above three faces, the edge approaching the input end face of the side adjacent face is capable of receiving a frame. A step is provided.

  According to the optical fiber with a video compensation function of the present invention, after the optical fiber receives an external force, a first optical fiber and a second optical fiber having different forms are formed, and the first optical fiber and the second optical fiber have a light exit end. And a plurality of light exit end portions constitute an output end surface, a plurality of light entrance end portions constitute an input end surface, and the cross-sections of these optical fibers constituting the input end surface are: The closer to the side adjacent surface, the area continuously decreases, and the radial cross-sectional ratio between the light exit end and the light entrance end of the first optical fiber is equal to the light exit end and the light entrance end of the second optical fiber. The minimum value of the cross-sectional ratio in the radial direction of the first optical fiber is close to 1, which is equal to or greater than the cross-sectional ratio in the radial direction.

  According to the optical fiber with a video compensation function of the present invention, the output end face is cut so as to be perpendicular to the axial direction of the optical fiber, the cross section of the plurality of optical fibers has a regular circle or a regular polygon, and the input end face is The section of the optical fiber is cut so as to be inclined in the axial direction, and the cross section of the plurality of optical fibers exhibits a non-circular or non-polygonal shape, so that the brightness of the image is constant even when viewed from the front or side. Has the effect of being.

It is a perspective view which shows the optical fiber with a video compensation function which concerns on embodiment of this invention. It is a figure (1) which shows the process of the operation | movement which produces the optical member which concerns on this invention. It is FIG. (2) which shows the process of the operation | movement which produces the optical member which concerns on this invention. It is FIG. (3) which shows the process of the operation | movement which produces the optical member which concerns on this invention. It is an enlarged view which shows the optical member which concerns on this invention. It is a figure which shows the cross section of the radial direction of the optical member which concerns on this invention. It is a figure which shows the cross section of the radial direction of the optical fiber which approaches the side adjacent surface of this invention, and the length of a light emission edge part (S1) and a light-incidence edge part (S2). It is a figure which shows the cross section of the radial direction of the optical fiber separated from the side adjacent surface of this invention. It is a figure which shows embodiment which applies the optical fiber with a video compensation function which concerns on this invention to the flat display apparatus with the same frame as a screen. It is a figure which shows the light guide direction of the 1st optical fiber in FIG. It is a figure which shows the light guide direction of the 2nd optical fiber in FIG. It is a figure which shows embodiment which applies the optical fiber with a video compensation function which concerns on this invention to a flat display apparatus with a frame higher than a screen. It is a figure (1) which shows the process of the operation | movement which produces the conventional optical member. It is a figure (2) which shows the process of the operation | movement which produces the conventional optical member. It is an enlarged view which shows the conventional optical member. It is a figure which shows the light guide direction of the conventional optical fiber. It is a figure which shows 1st Embodiment which is a specific application of the optical fiber in FIG. It is a figure which shows 2nd Embodiment which is a specific application of another conventional optical fiber. It is an enlarged view of FIG. It is sectional drawing of FIG. It is sectional drawing of the 1st optical fiber in FIG. It is sectional drawing of the 2nd optical fiber in FIG. It is a figure which shows 3rd Embodiment which is a specific application of another conventional optical fiber. It is an enlarged view which shows a part of optical fiber in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Please refer to FIG. The frame junction 42 formed by placing the two display devices 40 close to each other is not an effective image area. In other words, a fault occurs when an image straddles these display devices 40. For this reason, when the two optical members 10 according to the present invention are provided on the surface of the frame junction 42, that is, when the frame junction 42 is covered so that these optical members 10 are symmetrical left and right, the images of these display devices 40 are displayed. Is refracted by these optical members 10 and displayed on the frame junction 42, so that the image becomes a continuous screen.

  2 to 4 are views showing one method for producing the optical member 10 according to the present invention. First, as shown in FIG. 2, when a plurality of optical fibers 11 are arranged in the same direction to form a bundle, an optical member 10 is formed. Next, a force is applied to the surface of one side of the optical member 10 so that the optical member 10 is recessed toward the other side. And the optical member 10 in a recessed part is cut | disconnected, and a concave long block is formed. As shown in FIG. 3, when the block is cut to the bottom end along the longitudinal center line, two blocks whose radial cross section approximates a trapezoid are formed. As shown in FIG. 4, when the triangular rod 44 is removed, the optical member 10 approximates a triangular rod shape.

  Please refer to FIG. 4 to FIG. The cross section of the optical member 10 includes an output end surface 12, an input end surface 14, a side adjacent surface 16, and two contact surfaces that contact the above three surfaces (the output end surface 12, the input end surface 14, and the side adjacent surface 16). And a triangular rod composed of 18.

  Please refer to FIG. The optical member 10 that is a bundle is configured by arranging a plurality of optical fibers 11 in the same direction. The exit aperture angle (or numerical hole diameter) of these optical fibers 11 is larger than 11.5 °. The output end face 12 is configured by collecting cross sections of one end of these optical fibers 11. Each of the cross sections is cut into a direction perpendicular to the axial direction of the optical fiber 11 to thereby form a regular circle or a regular polygon. Since the cross section of the output end face 12 is not subjected to an external force at the time of manufacture, the density of the cross section is the same. The input end face 14 is configured by collecting cross sections of the other ends of these optical fibers 11. The cross section corresponds to the cross sectional shape of these optical fibers 11 on the output end face 12. The input end face 14 is affected by an external force at the time of manufacture, and the density of the cross section is affected. The density of the cross section of the input end face 14 continuously decreases to the side adjacent face 16 and is cut obliquely, so that the cross section It exhibits a non-regular circle or a non-regular polygon. For example, when the cross section of these optical fibers 11 on the output end face 12 has a perfect circular shape, the cross section of the input end face 14 exhibits a non-circular shape (approximate to an ellipse) because the optical fiber 11 on the input end face 14 receives an external force. . Next, the side adjacent surface 16 and these optical fibers 11 extend in the same direction. The angle formed by the side adjacent surface 16 and the input end surface 14 is an obtuse angle. An angle formed between the side adjacent surface 16 and the output end surface 12 is a first acute angle 191. The first acute angle 191 is 5 ° to 85 °, and preferably 8 ° to 75 °. The angle formed between the input end face 14 and the output end face 12 is a second acute angle 192. The second acute angle 192 is 1 ° to 50 °, and preferably 3 ° to 35 °.

  The cross section of these optical fibers 11 on the output end face 12 may be a regular polygon. Then, the cross section of these optical fibers 11 on the input end face 14 exhibits an irregular polygon corresponding to the cross section of the output end face 12. For example, when the cross section of these optical fibers 11 on the output end face 12 has a square shape, the cross section of these optical fibers 11 on the input end face 14 has a non-square shape (may have another quadrilateral shape).

  The cross-sectional areas of these optical fibers 11 on the input end face 14 continuously decrease as they approach the side-adjacent surface 16.

  FIG. 6 to FIG. 8 are views showing the overall form after the optical fiber 11 is pressed and the angle of the cross section of the end portion cut obliquely. After the optical fiber 11 is pressed, a first optical fiber 1101 and a second optical fiber 1102 having different forms of receiving force are formed. The cross-sectional angle of the first optical fiber 1101 is α °, and the cross-sectional angle of the second optical fiber 1102 is β °. The above-mentioned cross section angles α ° and β ° are angles of the cross section of the input end face 14 that are obliquely cut, continuously decreasing to the side adjacent face 16, 1 ° to 65 °, and 3 ° to 55 °. It is preferable that The cross-sectional angle α ° is the same as or smaller than the cross-sectional angle β °.

  Please refer to FIG. 6 and FIG. Each of these first optical fibers 1101 has a light exit end 1111 and a light entrance end 1112. The plurality of light exit end portions 1111 constitute the output end face 12. The plurality of light incident end portions 1112 constitute the input end surface 14. These first optical fibers 1101 are located at locations close to the side adjacent surface 16 in the optical member 10. Since the side adjacent surface 16 receives the force directly, these first optical fibers 1101 approaching the side adjacent surface 16 also receive the force and are deformed to change the cross-sectional density. One end of each first optical fiber 1101 constitutes the longest distance S1 in the radial section of the output end face 12 (located at the light exit end 1111), and the other end thereof is the longest distance S2 in the radial section of the input end face 14. (Located at the light incident end 1112). The longest distance S1 is longer than the longest distance S2 or the same as the longest distance S2. The ratio of the radial cross section of the first optical fiber 1101 is S1 / S2, and is close to 1 in the smallest case.

  Reference is now made to FIGS. The second optical fiber 1102 also has a light exit end 1111 and a light entrance end 1112. Since the second optical fiber 1102 has a larger distance from the side adjacent surface 16, the second optical fiber 1102 is less affected by being pressed and hardly deforms. The radial cross-section distance between the light exit end 1111 and the light entrance end 1112 is the same, and the cross-sectional ratio between the light exit end 1111 and the light entrance end 1112 is 1.

  With reference to FIGS. 7 and 8, the radial cross sections of the first optical fiber 1101 and the second optical fiber 1102 are compared. The ratio S1 / S2 of the radial cross section between the light exit end 1111 and the light entrance end 1112 of the first optical fiber 1101 is based on the ratio of the radial cross section between the light exit end 1111 and the light input end 1112 of the second optical fiber 1102. It is large or the same as the ratio of the radial cross section between the light exit end 1111 and the light entrance end 1112 of the second optical fiber 1102. The first optical fiber 1101 and the second optical fiber 1102 are composed of a core 112 and a skin 114. The refractive index of the core 112 is larger than the refractive index of the skin 114. The refractive index of the core 112 is 1.55 to 1.91, and the refractive index of the skin 114 is 1.39 to 1.53.

  FIG. 9 is a diagram showing a specific embodiment of the present invention. When the two display devices 40 are brought into contact with each other, the frame junction 42 is an ineffective area of the image, and a significant fault occurs in the image from these display devices 40 at the frame junction 42. For this reason, these optical members 10 are provided symmetrically at positions close to the frame junction 42 on the surface of each display device 40, and each input end face 14 is pasted in parallel to the corresponding display device 40 to output each output. The end surface 12 is provided symmetrically so as to be inclined upward. The position where the top ends of the output end faces 12 are in contact with each other is located immediately above the frame junction 42.

  Reference is now made to FIGS. When an image is emitted from these display devices 40, the image enters the input end face 14 and is emitted from the output end face 12. At this time, the image refracted by these optical members 10 extends and is displayed above the frame junction 42. As a result, the image becomes a continuous screen. And since the cross section of these optical fibers 11 which comprise the output end surface 12 is cut | disconnected so that it may be perpendicular | vertical to the axial direction of the optical fiber 11, the emitted light ray advances linearly along the axial direction of these optical fibers 11. . Thereby, the user displays the point A (when viewing the display device 40 from the left to the diagonally right direction, the point A is located on the left side of the display device 40), and the point B (displayed from the right to the diagonally left direction). When viewing the device 40, the point B is located on the left side of the display device 40), the point C (the point C is located in front of the display device 40), and the point D (display device from the left to the diagonally right direction). When viewing 40, the point D is located on the right side of the display device 40) or the point E (when viewing the display device 40 diagonally from the right to the left, the point E is on the right side of the display device 40). Even when viewed from the above, the screen image can obtain the planned brightness and does not generate a fault.

  FIGS. 10 and 11 are enlarged views showing a part of the structure of FIG. 9 and showing the traveling direction after the light beam is incident on the first optical fiber 1101 or the second optical fiber 1102. The light beam enters the first optical fiber 1101 or the second optical fiber 1102 and then travels along the first optical fiber 1101 or the second optical fiber 1102. Since the cross section of the light exit end of the first optical fiber 1101 and the second optical fiber 1102 is a perfect circle, the emitted light beam has a light exit aperture angle (or a numerical hole diameter) shown in the first optical fiber 1101 or the second optical fiber 1102. Proceed along. The exit aperture angle θ ° is greater than 11.5 °. In other words, the light exit end faces of the first optical fiber 1101 and the second optical fiber 1102 have a regular circular shape or a regular polygonal shape, so that the emitted light beam is guided by the end face of the light exit and proceeds.

  FIG. 12 is a diagram showing another specific embodiment in which these optical members 10 are provided. An abutting step 17 capable of receiving the frame 451 is provided at an edge of the optical member 10 according to the present invention that is close to the output end surface 12 of the side adjacent surface 16. This can be applied to a plurality of display devices 45 in which the frame 451 is higher than the video display structure 452.

DESCRIPTION OF SYMBOLS 10 Optical member 11 Optical fiber 12 Output end surface 14 Input end surface 16 Side adjacent surface 17 Contact stage 18 Contact surface 40 Display device 42 Frame junction 44 Triangle rod 45 Display device 50 Optical member 51 Output end surface 52 Input end surface 53 Side adjacent surface 60 Display Device 70 Optical member 71 End side 72 Resin support structure 80 Display device 90 Optical member 91 Oblique side 92 Optical fiber 112 Core 114 Skin 191 First acute angle 192 Second acute angle 451 Frame 452 Video display structure 501 Optical fiber 701 First optical fiber 702 Second optical fiber 1101 First optical fiber 1102 Second optical fiber 1111 Light exit end 1112 Light incident end D1 Radial length D2 Radial length S1 Longest distance S2 Longest distance

Claims (3)

An optical member having a plurality of optical fibers arranged in the same direction and coupled to each other; each of the optical fibers includes a core and a skin, and the refractive index of the core is 1.55 to 1.91; The refractive index of the skin is 1.39 to 1.53, and the exit aperture angle of these optical fibers is larger than 11.5 °, and the cross section of the optical member has an output end face, an input end face, and a side adjacent face. And consists of
The output end face is formed by concentrating the cross sections of one end of the optical fibers, and the cross section has a regular circular shape or a regular polygon, and the cross section of the output end face is not subjected to external force. Are the same density,
The input end face is formed by concentrating the cross sections of the other ends of the optical fibers, the shape of the cross section corresponds to the shape of the cross section of the optical fibers of the output end face, and the input end face receives an external force. Therefore, the cross-sectional density continuously decreases to the side adjacent surface, and is cut obliquely, so that the cross-sectional shape exhibits a non-circular shape or a non-regular polygon, and constitutes the input end surface. The bevel cross-sectional angle of the optical fiber continuously decreases to the side adjacent surface, and the angle is 1 ° to 65 °, preferably 3 ° to 55 °,
The side adjacent surface extends in the same direction as the optical fibers, the angle formed by the side adjacent surface and the input end surface is an obtuse angle, and the angle formed by the side adjacent surface and the output end surface is a first acute angle. And an angle formed between the input end face and the output end face is a second acute angle, the first acute angle is 5 ° to 85 °, preferably 8 ° to 75 °, and the second acute angle is An optical fiber with an image compensation function, characterized in that the angle is 1 ° to 50 °, and preferably 3 ° to 35 °.   The two optical members are provided symmetrically at the knots of the two display devices, and any one of the optical members is cut into a shape approximating a triangular rod, and the output end surface and the input end surface And an abutting step capable of receiving a frame is provided at an edge of the side adjacent surface approaching the input end surface. The optical fiber with a video compensation function according to claim 1, wherein the optical fiber has a video compensation function.   After the optical fiber receives an external force, a first optical fiber and a second optical fiber having different forms are formed, and the first optical fiber and the second optical fiber have a light exit end, a light entrance end, A plurality of the light exit end portions constitute the output end face, a plurality of the light entrance end portions constitute the input end face, and the cross-sections of these optical fibers constituting the input end face are the side The area decreases continuously as it approaches the adjacent surface, and the radial cross-sectional ratio between the light exit end and the light entrance end of the first optical fiber is the same as that of the light exit end of the second optical fiber. 2. The image compensation according to claim 1, wherein a minimum value of the radial cross-sectional ratio of the first optical fiber is close to 1 and is equal to or larger than a radial cross-sectional ratio with respect to the writing light end. Optical fiber with function.

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