WO2009099276A2 - Tube fluorescent - Google Patents

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Publication number
WO2009099276A2
WO2009099276A2 PCT/KR2009/000296 KR2009000296W WO2009099276A2 WO 2009099276 A2 WO2009099276 A2 WO 2009099276A2 KR 2009000296 W KR2009000296 W KR 2009000296W WO 2009099276 A2 WO2009099276 A2 WO 2009099276A2
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WO
WIPO (PCT)
Prior art keywords
light
angle
light pipe
section
cross
Prior art date
Application number
PCT/KR2009/000296
Other languages
English (en)
Korean (ko)
Other versions
WO2009099276A3 (fr
Inventor
Kang-Hoon Lee
Original Assignee
Kang-Hoon Lee
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080040602A external-priority patent/KR100970741B1/ko
Application filed by Kang-Hoon Lee filed Critical Kang-Hoon Lee
Priority to CN2009801040817A priority Critical patent/CN101939674A/zh
Priority to US12/866,109 priority patent/US20110002139A1/en
Publication of WO2009099276A2 publication Critical patent/WO2009099276A2/fr
Publication of WO2009099276A3 publication Critical patent/WO2009099276A3/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide

Definitions

  • the present invention relates to a light pipe, and more particularly to a light pipe using total internal reflection.
  • a light pipe is an optical member used to transmit light generated from a light source with a relatively small loss to a long distance or to effectively distribute functional light such as a decorative light to a relatively large area, and includes a light conduit and a light guide ( Also called a light guide, or light tube.
  • the light pipe structure consists of a transparent polymeric material and includes a tubular wall having an outer surface structured with a fine structure and a smooth inner surface opposite thereto. And the structured outer surface is constituted by a plurality of identically shaped linear prisms extending in the longitudinal direction of the light pipe.
  • the light pipe transmits the light beam from the inside of the light pipe to a long distance by advancing the light beam incident into the light pipe by total internal reflection within a predetermined angle range.
  • 1 to 3 are views for explaining a light pipe according to the prior art.
  • FIG. 1 is a cross-sectional view showing the path of the light beam in a cylindrical light pipe using a triangular prism according to the prior art
  • Figure 2 is a path of the light beam when the inner surface is a plane in the light pipe using a triangular prism according to the prior art
  • 3 is an enlarged cross-sectional view
  • FIG. 3 is a cross-sectional view showing a range in which total reflection occurs in a square column type light pipe using a triangular prism according to the related art.
  • the light source 12 is positioned at the center of the cross section.
  • the light rays 14 generated from the light source 12 travel radially and form an angle of 90 ° with the inner surface of the cylindrical light pipe 100. Accordingly, the angle formed by the incident angle of the light beam 14 and the normal of the inner surface becomes 0 ° and is not refracted, thereby entering the inside of the triangular prism 16.
  • the light ray 14 entering the triangular prism 16 is totally internally reflected at the triangular prism face 18 so that its path is changed. By repeating this process, light is transmitted with a relatively low transmission loss inside the cylindrical light pipe 10.
  • Equation 1 the refractive index of the light pipe.
  • the angle P is 90 ° and the angle D has any value, the angle D is 135 °, so the angle C formed by the normal 24 of the triangular prism face 18 and the light beam 14 is equal to 45 ° -B.
  • the critical angle ⁇ c is 39.56 °, so when the angle C is 39.56 ° or less, the light beam 14 is not totally reflected and is emitted to the outside.
  • Equation 2 when the refractive index of the light pipe is 1.57, when the angle A formed between the normal line 22 of the light pipe inner surface 20 and the light beam 14 is 8.56 ° or more, the light beam is It can be seen that the light pipe is not totally reflected within the light pipe and is emitted to the outside.
  • FIG. 3 in the case of a rectangular columnar light pipe using a triangular prism according to the related art, the normal 22 of the light pipe inner surface 20 and the 8.56 ° from the light source 12 located at the center of the cross section is shown. Only light rays incident at the following angles become total reflection. Therefore, total reflection may occur only in the sections 26, 28, 30, and 32 forming an angle of 8.56 ° or less with the normal 22 of the inner surface 20 of the light pipe, and in other regions, the total reflection may occur to the outside, such as the ray I. Is released. Therefore, when the inner surface of the light pipe using the triangular prism according to the prior art is a plane, the light rays generated from the light source are emitted to the outside without proceeding continuously causing total reflection in the light pipe.
  • the inner surface of the light pipe is in the form of a polygonal column
  • the light incident from the light source causes a total reflection, so that the range of the angle of incidence for narrowing is narrowed, thereby preventing the efficient transmission of light.
  • an object of the present invention is to provide a light pipe which can efficiently transmit light and can freely set the position of the light source.
  • Another object of the present invention is to provide a light pipe that can efficiently transmit light even when the inner surface is not formed in the form of a cylinder.
  • the present invention is a light pipe comprising a body portion is formed in the longitudinal hollow and a plurality of prism portion formed in the longitudinal direction on the outer surface of the body portion
  • the cross section is configured to include a reflecting portion having a right-angled isosceles triangle and an angle adjusting portion provided between the body portion and the reflecting portion.
  • the cross section of the angle adjusting unit may be a right triangle in which the hypotenuse is in contact with the body portion, and the size of the vertex angle between the body portion and the reflecting portion is determined according to the position of the light source.
  • the cross section of the angle adjusting unit may have an isosceles triangle having the same length of the side contacting the body portion and the reflecting portion, and a size of a vertex angle between the body portion and the reflecting portion depending on the position of the light source.
  • the size of the vertex angle may be the same as the size of the angle of refraction when the light beam generated from the light source proceeds in parallel with the cross section of the light pipe and is incident and refracted by the inner surface of the body portion.
  • G is, Where G is the vertex angle, n is the index of refraction of the light pipe, and E is the angle of incidence when the light beam from the light source travels parallel to the cross section of the light pipe and is incident on the inner surface of the body portion, respectively.
  • G is the vertex angle
  • n is the index of refraction of the light pipe
  • E is the angle of incidence when the light beam from the light source travels parallel to the cross section of the light pipe and is incident on the inner surface of the body portion, respectively.
  • the light pipe may further include a filter unit for converting a color of light generated from the light source, wherein the filter unit is disposed at a front surface of the reflector and a reflector for reflecting light rays generated from the light source. It may be configured to include a light transmissive color filter including a colored layer, and a motor for rotating the color filter.
  • the hollow may be formed in the shape of a polygonal pillar.
  • the prism unit Where G is the vertex angle, L is the length of the body portion section in which the angle control portion with the vertex angle G is formed, h is the distance from the light source to the point where the incident angle is 0 ° on the inner surface of the body portion, n is The refractive index of the light pipe, k, may represent any amount of rational numbers, respectively.
  • the hollow may be formed in a cylindrical shape.
  • the prism unit Where G is the vertex angle, L is the length of the body section where the angle control section with the vertex G is formed, r is the radius of the hollow cross section, n is the refractive index of the light pipe, k is any amount
  • the ratio, h may represent a distance from the light source to the point where the incident angle is 0 ° on the inner surface of the body portion.
  • the hollow cross section may be a figure combining two identical arcs.
  • the prism unit Where G is the vertex angle, L is the length of the body section in which the angle control part with the vertex angle G is formed, r is the radius of the arc, n is the refractive index of the light pipe, k is any positive rational number, h may represent a distance from the light source to the point where the incident angle is 0 ° on the inner surface of the body portion.
  • the hollow cross section may be a figure in which two identical circular arcs and two identical straight lines are coupled to face each other.
  • the inner surface of the light pipe can be formed in a variety of forms as well as the cylindrical of the prior art can be expected to save power by applying to a signboard and various display devices, the advantage that can efficiently transmit light to a long distance There is this.
  • the present invention it is possible to provide a light pipe that can be applied to signboards and various display devices that are difficult to apply to conventional cylindrical light pipes.
  • a square pillar light pipe according to the present invention there is an advantage that the power saving effect and manufacturing efficiency is increased.
  • FIG. 1 is a cross-sectional view showing the path of light in a cylindrical light pipe using a triangular prism according to the prior art.
  • Figure 2 is an enlarged cross-sectional view showing the path of the light beam when the inner surface is a plane in the light pipe using a triangular prism according to the prior art.
  • FIG 3 is a cross-sectional view showing a range in which total reflection occurs in a square columnar light pipe using a triangular prism according to the related art.
  • Figure 4 is an enlarged cross-sectional view showing the path of the light beam in the light pipe to which the prism portion is applied according to a specific embodiment of the present invention.
  • FIG. 5 is an enlarged cross-sectional view illustrating a path of light in a light pipe to which a prism unit is applied according to another embodiment of the present invention.
  • FIG. 6 is an enlarged cross-sectional view illustrating a path of light in a light pipe to which a prism formed by rotating a conventional triangular prism by a predetermined angle;
  • FIG. 7 is a perspective view showing a light pipe according to a first embodiment of the present invention.
  • Fig. 8 is a sectional view showing the light pipe according to the first embodiment of the present invention.
  • FIG. 9 is a cross-sectional view showing a path of light rays in the light pipe according to the first embodiment of the present invention.
  • FIG. 10A is a perspective view showing light rays traveling inside the light pipe according to the first embodiment of the present invention.
  • FIG. 10B is a perspective view showing light rays traveling in the prism portion of the light pipe according to the first embodiment of the present invention.
  • Fig. 10C is a longitudinal sectional view showing the light ray traveling in the prism portion of the light pipe according to the first embodiment of the present invention on the YZ plane.
  • 10D is a cross sectional view showing a light ray traveling in a prism portion of a light pipe according to the first embodiment of the present invention on a ZX plane;
  • FIG. 11 is a perspective view showing a light pipe according to a second embodiment of the present invention.
  • FIG. 12 is a sectional view showing a light pipe according to a second embodiment of the present invention.
  • FIG. 13 is a cross-sectional view showing the path of light in the light pipe according to the second embodiment of the present invention.
  • FIG. 14 is a perspective view showing a light pipe according to a third embodiment of the present invention.
  • 15 is a sectional view showing a light pipe according to a third embodiment of the present invention.
  • 16 is a cross-sectional view showing the path of light rays in the light pipe according to the third embodiment of the present invention.
  • FIG. 17 is a perspective view showing a light pipe according to a fourth embodiment of the present invention.
  • FIG. 18 is a sectional view showing a light pipe according to a fourth embodiment of the present invention.
  • FIG. 19 is an exploded perspective view showing the configuration of a light pipe according to a fifth embodiment of the present invention.
  • body portion 304 prism portion
  • 4 to 19 are diagrams for explaining a light pipe constituting each embodiment of the present invention.
  • the angle of incidence means the angle formed by the incident light beam and the normal of the interface when the light beam traveling in the medium reaches the interface with another medium.
  • the angle of refraction refers to the angle formed by the light rays refracted at the interface with the normal of the interface.
  • FIG. 4 is an enlarged cross-sectional view illustrating a path of light rays in a light pipe to which a prism part is applied according to a specific embodiment of the present invention
  • FIG. 5 is a view of a path of light rays in a light pipe to which a prism part is applied according to another embodiment of the present invention
  • 6 is an enlarged cross-sectional view
  • FIG. 6 is an enlarged cross-sectional view illustrating a path of a light beam in a light pipe to which a prism formed by rotating a conventional triangular prism by a predetermined angle.
  • the light pipe 50 includes a body portion 52 and a prism portion 54.
  • the body portion 52 is formed in the shape of a hollow tube in which the hollow 56 in the longitudinal direction is formed, and is a structure that forms the inner side of the light pipe 50.
  • a plurality of prism portions 54 are formed in the longitudinal direction on the outer surface of the body portion 52.
  • the prism part 54 is a structure having a rectangular cross section, and includes a reflecting part 58 and an angle adjusting part 60.
  • the reflecting portion 58 is a portion composed of a right isosceles triangle when the cross section of the prism portion 54 is divided into two right triangles.
  • the reflector 58 is provided in a form corresponding to a shape in which a triangular prism provided in the light pipe according to the related art is rotated by a predetermined angle.
  • the angle adjusting unit 60 is provided between the body portion 52 and the reflecting portion 58.
  • the cross section of the angle adjuster 60 is a right triangle, and the hypotenuse is configured to contact the body portion 52.
  • the size of the vertex angle between the body portion 52 and the reflecting portion 58 is determined according to the position of the light source.
  • the configuration of the prism portion 54 will be described in detail by taking an example in which light rays generated from the light source are incident at an angle of incidence angle E with respect to the inner surface of the body portion 52.
  • the refractive angle G is in accordance with Snell's law. It is calculated
  • n represents the refractive index of the light pipe.
  • Equation 4 Equation 4
  • the light ray 62 is totally reflected at the neighboring prism face 68 of the prism part 54 and proceeds to the hollow 56 of the light pipe 50. do.
  • the neighboring prism face 68 should be incident at an angle larger than the critical angle.
  • the light beam 62 is totally reflected at the prism face 66, and then the normal 67 of the prism face 66 and the light beam 62 to be totally reflected back at the neighboring prism face 68.
  • the angle H is 45 degrees.
  • the refractive index n of the polycarbonate, polymethyl methacrylate, acrylic, polypropylene, polystyrene, polyvinyl chloride, etc. constituting the light pipe 50 according to a specific embodiment of the present invention Satisfies Equation 4 above.
  • the cross section of the reflecting portion 58 is a right angle isosceles triangle
  • the angle formed by the cross section of the reflecting portion 58 and the cross section of the body portion 52 is the inner side of the body portion 52 of the light beam 62. It is equal to the refraction angle G refracted at 64. That is, the reflector 58 has a shape corresponding to a shape in which a cross section of a structure having a right angle isosceles triangle is rotated by an angle G.
  • the angle G formed between the cross section of the reflecting portion 58 and the cross section of the body portion 52 is equal to the size of the vertex angle of the cross section of the angle adjusting portion 60. That is, the angle adjusting part 60 is provided between the body part 52 and the reflecting part 58, and the body part 52 and the reflecting part 58 in the cross section of the angle adjusting part 60.
  • the angle of vertices between the elements is equal to the angle of refraction angle when the light ray 62 is incident and refracted by the inner surface 64 of the body portion 52. Therefore, the shape of the angle adjuster 60 is determined according to the relative position between the light source and the inner surface of the light pipe 50.
  • the smaller the size of the prism portion 54 is designed to increase the efficiency of light transport and to reduce the weight of the light pipe.
  • the material of the light pipe 50 including the prism portion 54 is made of a material having excellent light transmittance and mechanical stability, such as polycarbonate, polymethyl methacrylate, acrylic, polypropylene, polystyrene, and polyvinyl chloride. Can be.
  • the material of the light pipe 50 may be determined according to the type of light source to be used.
  • the light source used for the light pipe 50 is a point light source having high efficiency such as mercury lamp or metal lamp
  • the temperature generated in the heat-resistant polycarbonate can be used as a material of the light pipe (50).
  • the light pipe 70 includes a body portion 72 and a prism portion 74.
  • the body portion 72 is formed in the form of a hollow tube in which the hollow 76 in the longitudinal direction is formed, and is a structure that forms the inner side of the light pipe 70.
  • the prism portion 74 is formed in plural in the longitudinal direction on the outer surface of the body portion 72.
  • the prism portion 74 is a structure having a rectangular cross section, and includes a reflector 78 and an angle adjuster 80.
  • the reflector 78 is a portion that is composed of a right isosceles triangle when the cross section of the prism portion 74 is divided into two isosceles triangles.
  • the reflector 78 is provided in a form corresponding to a shape in which a triangular prism provided in the light pipe according to the related art is rotated by a predetermined angle.
  • the angle adjusting portion 80 is a portion provided between the body portion 72 and the reflecting portion 78
  • the cross section of the angle adjusting portion 80 is the size of the vertex angle is determined according to the position of the light source. It is composed of isosceles triangles. That is, the cross section of the angle adjusting unit 80 has the same length of two sides in contact with the body portion 72 and the reflecting portion 78, and the size of the vertex angle between the body portion 72 and the reflecting portion 78. Is an isosceles triangle determined by the position of the light source.
  • the configuration of the prism portion 74 will be described in detail by taking an example in which light rays generated from the light source are incident at an angle of incidence angle E with respect to the inner surface of the body portion 72.
  • the refractive angle G is in accordance with Snell's law. It is calculated
  • n represents the refractive index of the light pipe.
  • Equation (4) the condition for the total reflection to occur is shown in Equation (4).
  • the light ray 82 is totally reflected at the neighboring prism face 88 of the prism portion 74 and proceeds to the hollow 76 of the light pipe 70. do.
  • the neighboring prism face 88 should be incident at an angle larger than the critical angle.
  • the light ray 82 is totally reflected at the prism face 86, and then the normal 87 of the prism face 86 and the light ray 82 to be totally reflected back at the neighboring prism face 88.
  • the angle H is 45 degrees.
  • the refractive index n of the polycarbonate, polymethyl methacrylate, acrylic, polypropylene, polystyrene, polyvinyl chloride, etc. constituting the light pipe 70 according to another embodiment of the present invention Satisfies Equation 4 above.
  • the angle formed by the cross section of the reflector 78 and the cross section of the body portion 72 is such that the ray 82 is the inner surface of the body portion 72. It is equal to the refraction angle G refracted at 84. That is, the reflector 88 has a shape corresponding to a shape in which a cross section of a structure having a right isosceles triangle is rotated by an angle G.
  • the angle G formed between the cross section of the reflector 78 and the cross section of the body portion 72 is equal to the size of the vertex angle of the cross section of the angle adjuster 80. That is, the angle adjusting portion 80 is provided between the body portion 72 and the reflecting portion 78, the body portion 72 and the reflecting portion 78 in the cross section of the angle adjusting portion 80.
  • the vertex angle between the upper and lower sides is configured to be equal to the angle of refraction angle when the light ray 82 is incident and refracted by the inner surface 84 of the body portion 72. Therefore, the shape of the angle adjuster 80 is determined according to the relative position between the light source and the inner surface of the light pipe 70.
  • the smaller the size of the prism portion 74 is designed to increase the efficiency of light transport and reduce the weight of the light pipe.
  • the material of the light pipe 70 including the prism portion 74 is composed of a material having excellent light transmittance and mechanical stability, such as polycarbonate, polymethyl methacrylate, acrylic, polypropylene, polystyrene, and polyvinyl chloride. Can be.
  • the material of the light pipe 70 may be determined according to the type of light source used.
  • the light source used for the light pipe 70 is a point light source of high efficiency such as mercury lamp or metal lamp
  • the temperature generated in the heat-resistant polycarbonate can be used as a material of the light pipe (70).
  • FIG. 6 is an enlarged cross-sectional view illustrating a path of light in a light pipe to which a prism formed by rotating a conventional triangular prism by an angle.
  • a light beam 94 generated from a light source (not shown) may be used as the light pipe 90. If the total reflection is first-order in the extension line section 96 of the conventional triangular prism when it is incident, the total reflection is emitted to the outside without continuing to occur.
  • the prism portions 54 and 74 are rectangular in cross section, and the relative cross section between the light source and the inner surfaces 64 and 84 of the light pipes 50 and 70 is removed. According to the position, the reflection parts 58 and 78 having a cross section of a right isosceles triangle and the angle adjusting parts 60 and 80 having a cross section of a right triangle or an isosceles triangle are formed in a combined shape so that total reflection can occur continuously.
  • FIG. 7 is a perspective view showing a light pipe according to a first embodiment of the present invention
  • FIG. 8 is a sectional view showing a light pipe according to a first embodiment of the present invention
  • FIG. 9 is a first embodiment of the present invention.
  • 10 is a cross-sectional view showing a path of light rays in the light pipe
  • FIG. 10 (a) is a perspective view showing light rays traveling in the light pipe according to the first embodiment of the present invention
  • FIG. 10 (b) Is a perspective view showing the light rays traveling in the prism portion of the light pipe according to the first embodiment of the present invention
  • FIG. 10 (c) shows the light rays traveling in the prism portion of the light pipe according to the first embodiment of the present invention.
  • FIG. 10 (d) is a cross-sectional view showing the light beam traveling in the prism portion of the light pipe according to the first embodiment of the present invention on the ZX plane
  • FIGS. 8 and 9 are cross-sectional views showing the light pipe according to the first embodiment of the present invention, wherein the light rays shown here represent only components horizontal to the cross section with respect to the light rays traveling three-dimensionally inside the light pipe. .
  • the light pipe 100 includes a body portion 102 and a prism portion 104.
  • the body portion 102 is formed in the form of a hollow tube in which the hollow 106 in the longitudinal direction is formed, the outer surface of the body portion 102 is provided with a plurality of prism portion 104 in the longitudinal direction.
  • the prism portion 104 is composed of a reflecting portion 112 and the angle adjusting portion 114.
  • the light ray 110 generated from the light source 108 and incident into the hollow 106 of the light pipe 100 is incident on the inner surface 116 of the light pipe 100 to be snelled in the prism portion 104. Reflected by total reflection conditions in accordance with By repeating the above process, the light ray 110 proceeds in the longitudinal direction of the light pipe 100.
  • the light ray 110 may travel in the longitudinal direction of the light pipe 100 with little transmission loss.
  • the light pipe 100 according to the first embodiment of the present invention is distinguished from the conventional light pipe in that the hollow 106 is formed in the shape of a square pillar.
  • the light pipe 100 is the prism portion 104 according to the relative position of the light source 108 and the inner surface 116 of the body portion 102 of the light pipe 100. ) Shape is determined.
  • the size of the vertex angle between the body part 102 and the reflecting part 112 is determined by the light beam 110. It is equal to the magnitude of the angle of refraction when it is incident and refracted by the inner surface 116 of the body portion 102 to proceed in parallel with the cross section of.
  • the angle of refraction of the light ray 110 is determined according to the refractive index of the light pipe 100 and the angle of incidence of the light ray 110, the magnitude of the angle of incidence of the light source 108 and the body portion 102. It depends on the relative position between the sides 116.
  • the shape of the prism portion 104 determined according to the relative position between the light source 108 and the inner surface 116 of the body portion 102 will be described in detail with reference to FIG. 8.
  • the refractive angle G is 0 °, 1 °, 2 °, 3 °,... Can be obtained. Then, using the distance h from the light source 108 to the point of incidence angle 0 ° on the inner surface 116 of the body portion 102, the distance M from the point of incidence angle 0 ° to the point of incidence angle E Can be obtained. In addition, assuming that the angle of refraction of the section between the point of refraction angle G and the point of G + 1 ° is G, the length L of the section having the refraction angle G may be obtained using the distance M. FIG.
  • the vertex angle between the body portion 102 and the reflecting portion 112 in the right triangle which is a cross section of the angle adjusting part 114, is equal to the refractive angle G of the light beam 110, so that the magnitude of the vertex angle is G.
  • the phosphorus interval L can be derived by the general formula. The process of obtaining the section L is shown in Equation 6 below.
  • the refraction angle G is 0 °, 1 °, 2 °, 3 °,...
  • a section having the magnitude of the vertex angle G may be derived as a general formula. Same as
  • the refractive index n of the light pipe 100 according to the first embodiment of the present invention is 1.57
  • the refractive angle G is 0 °, 1 °, 2 °, 3 °,...
  • the angle of vertex between the body portion 102 and the reflecting portion 112 in the right triangle that is the cross section of the angle adjusting portion 114 in the light pipe 100 according to the first embodiment of the present invention.
  • the size is determined only by the refractive index n of the light pipe 100 and the distance h value from the light source 108 to the inner side surface 116 of the body portion 102. Therefore, the above calculation process may be equally applied even when the hollow cross section of the light pipe has a polygonal shape.
  • the arrangement of the prism portions 104 on the two surfaces facing each other are formed identically. do.
  • the cross section of the hollow 106 has a square shape
  • all four sides of the prism portion 104 are formed in the same manner.
  • the arrangement of the prism portions 104 on the four sides of the light pipe 100 is the body portion 102 from the light source 108. It is determined according to the distance h value to the inner surface 116 of the formed differently.
  • the light ray 110 generated from the light source 108 is incident on the light pipe 100 and reflected from the prism portion 104 by total reflection conditions according to Snell's law.
  • the light rays 110 totally reflected by the prism portion 104 are totally reflected by the opposite prism portion 104 at the same angle of incidence and travel in the longitudinal direction of the light pipe 100.
  • the light ray 110 undergoes total reflection at the first incident surface, and then enters the total reflection again by being incident on the opposite or neighboring surface of the first incident surface at the same incident angle as the incident angle at the first incident surface. Will be raised. Accordingly, the light ray 110 may travel in the longitudinal direction of the light pipe 100 while continuously generating total reflection at the prism portion 104.
  • FIGS. 10A to 10D a range of allowable angles at which total reflection occurs when the light ray 110 generated from the light source 108 travels at a predetermined angle with the centerline 118 of the light pipe 100 is illustrated in FIGS. 10A to 10D. See).
  • the light beam 110 proceeds in substantially parallel to the longitudinal direction of the prism portion 104 and is incident.
  • the light ray 110 is refracted by the inner surface 116 of the body portion 102 of the light pipe 100 to form an angle T with respect to the prism surface of the prism portion 104.
  • the refraction angle P forms an angle substantially equal to the critical angle. Therefore, when analyzing only the ZY component of the light ray 110 in the ZY plane, the refractive angle P of the light ray 110 can be obtained according to Snell's law, and the angle Q between the prism plane and the light ray 110 is It can obtain
  • the refractive angle P and the angle Q are as shown in Equation 8.
  • the angle formed by the light ray 110 and the prism plane is equal to 45 °.
  • the angle T in FIG. 10 (b) is equal to the angle 45 ° in FIG. 10 (d).
  • the angle T in FIG. 10 (b) is always 0 ° regardless of the angle 45 ° in FIG. 10 (d). Therefore, the angle T and the angle Q have a proportional relationship with each other. Therefore, the angle of incidence H and the angle of incidence H on the prism plane of the light ray 110 may be obtained as in Equation 9 below.
  • the range of the angle Z that the light ray 110 and the center line 118 of the light pipe 100 satisfies the range of 0 ° or more and 90 ° or less.
  • the incident angle H is 45 °
  • the incident angle H is obtained by using Equation 9 to obtain the value of the incident angle H.
  • the range of the incident angle H is equal to the following Equation 10, which satisfies the total reflection condition as shown in Equation 10 below.
  • n is a refractive index according to the material of the light pipe 100, and the refractive index n of polycarbonate, polymethyl methacrylate, acrylic, polypropylene, polystyrene, polyvinyl chloride, etc. of the material of the light pipe 100
  • the incident angle H satisfies Equation 10 above.
  • the angle Z satisfies the condition of 0 ° or more and 90 ° or less, all the light rays 110 generated from the light source 108 satisfy the total reflection condition.
  • the angle H at which the light ray 110 is incident on the prism face of the prism portion 104 is between 45 ° and 64.78 °, thereby satisfying the total reflection condition H> 39.56 °.
  • the incident angle H is minimum, and as the angle Z decreases, the incident angle H becomes larger. Therefore, when the incident angle H when the angle Z is 90 ° satisfies the total reflection condition, the light ray 110 satisfies the total reflection condition at any point of the prism portion 104.
  • FIG. 11 is a perspective view showing a light pipe according to a second embodiment of the present invention
  • FIG. 12 is a sectional view showing a light pipe according to a second embodiment of the present invention
  • FIG. 13 is a second embodiment of the present invention. It is sectional drawing which shows the path
  • FIGS. 12 and 13 are cross-sectional views showing a light pipe according to a second embodiment of the present invention, wherein the light rays shown here represent only components horizontal to the cross section with respect to the light rays traveling three-dimensionally inside the light pipe. .
  • the light pipe 200 has a circular hollow tube shape, and includes a body portion 202 and a prism portion 204.
  • the body portion 202 is formed in the shape of a hollow tube in which the hollow 206 in the longitudinal direction is formed, the outer surface of the body portion 202 is provided with a plurality of prism portion 104 in the longitudinal direction.
  • the prism portion 204 is composed of a reflecting portion 212 and the angle adjuster (214).
  • Light rays 210 generated from the light source 208 and incident into the hollow 206 of the light pipe 200 are incident on the inner surface 216 of the light pipe 200 to be snelled at the prism portion 204. Reflected by total reflection conditions in accordance with By repeating the above process, the light beam 210 proceeds in the longitudinal direction of the light pipe 200.
  • the light beam 210 may travel in the longitudinal direction of the light pipe 200 with little transmission loss.
  • the light pipe 200 according to the second embodiment of the present invention is a conventional light pipe in that the light source 208 is not located at the center of the cross section of the light pipe 200 but may be provided at a position off the center. There is a distinctive feature.
  • the shape of the prism portion 204 is determined according to the relative positions of the light source 208 and the light pipe 200.
  • the light beam 210 is the light pipe 200 It is equal to the size of the angle of refraction when it is incident and refracted by the inner surface 216 of the body portion 202 to proceed in parallel to the cross section of.
  • the angle of refraction of the light beam 210 is determined according to the refractive index of the light pipe 200 and the angle of incidence of the light beam 210, the magnitude of the angle of incidence of the light source 208 and the body 202. It depends on the relative position between the sides 216.
  • the shape of the prism portion 204 determined according to the relative position between the light source 208 and the inner surface 216 of the body portion 202 will be described in detail with reference to FIG. 12.
  • the refractive angle G is 0 °, 1 °, 2 °, 3 °,... Can be obtained. And the distance h from the light source 208 to the point where the incident angle is 0 ° from the inner surface 216 of the body portion 202, the radius r of the cross section of the hollow 206, and the incident angle from the light source 208.
  • the vertex angle between the body portion 202 and the reflecting portion 212 in the right triangle which is a cross section of the angle adjusting portion 214, is equal to the refractive angle G of the light beam 210, so the magnitude of the vertex angle is G.
  • the phosphorus interval L can be derived by the general formula. The process of obtaining the section L is shown in Equation 11 below.
  • the refraction angle G is 0 °, 1 °, 2 °, 3 °,...
  • k is an arbitrary positive ratio
  • a section in which the magnitude of the vertex angle is G may be derived as a general formula.
  • the light pipe 200 has a refractive index n and the light source 208 from the light source 208 to the point where the incidence angle is 0 ° on the inner surface 216 of the body portion 202.
  • the shape of the prism portion 204 is determined according to the distance h and the radius r value of the cross section of the hollow 206.
  • the light ray 210 generated from the light source 208 is incident on the light pipe 200 and reflected from the prism portion 204 under total reflection conditions according to Snell's law.
  • the light rays 210 totally reflected by the prism portion 204 are totally reflected at the opposite prism portion 204 at the same angle of incidence and travel in the longitudinal direction of the light pipe 200.
  • the light beam 210 undergoes total reflection at the first incident surface, and then enters the total incident reflection with respect to the relative incident surface of the first incident surface at the same incident angle as the incident angle at the first incident surface. Accordingly, the light ray 210 may travel in the longitudinal direction of the light pipe 200 while continuously generating total reflection at the prism portion 204.
  • the light pipe 200 when the light beam 210 proceeds at an angle of 90 ° with the center line of the light pipe 200, the incident angle at the prism portion 204 When the total reflection condition is satisfied, the light beam 210 satisfies the total reflection condition at any point of the prism portion 204, which is known in the case of the light pipe according to the first embodiment of the present invention with reference to FIG. Same as seen.
  • FIG. 14 is a perspective view showing a light pipe according to a third embodiment of the present invention
  • FIG. 15 is a sectional view showing a light pipe according to a third embodiment of the present invention
  • FIG. 16 is a third embodiment of the present invention. It is sectional drawing which shows the path
  • 15 and 16 are cross-sectional views showing the light pipe according to the third embodiment of the present invention, wherein the light rays shown here represent only components horizontal to the cross section with respect to the light rays traveling three-dimensionally inside the light pipe. .
  • the light pipe 300 includes a body portion 302 and a prism portion 304.
  • the body portion 302 is formed in the shape of a hollow tube in which the hollow 306 in the longitudinal direction is formed, and the hollow 306 is formed in the shape of a figure combining two circular arcs having the same cross section.
  • the outer surface of the body portion 302 is provided with a plurality of prism portion 304 in the longitudinal direction, the prism portion 304 is composed of a reflecting portion 312 and the angle adjuster 314.
  • the light ray 310 generated from the light source 308 is reflected by the total reflection condition in the prism portion 304 according to Snell's law, and by repeating this process, the light ray 310 is the length of the light pipe 300. Proceed in the direction. In addition, since the medium filling the hollow 306 of the light pipe 300 is air, the light ray 310 may proceed with little transmission loss.
  • the light pipe 300 according to the third embodiment of the present invention is distinguished from the conventional light pipe in that the cross section of the hollow 306 is formed in the shape of a figure in which two identical arcs are combined.
  • the shape of the prism portion 304 is determined according to the relative positions of the light source 308 and the light pipe 300.
  • the right angle between the body portion 302 and the reflecting portion 312 in the right triangle, which is a cross section of the angle adjusting portion 314 constituting the prism portion 304, the light beam 310 is the light pipe 300 It is equal to the size of the angle of refraction when it is incident and refracted by the inner surface 316 of the body portion 302 to proceed in parallel with the cross section of the cross-section.
  • the angle of refraction of the light ray 310 is determined according to the refractive index of the light pipe 300 and the angle of incidence of the light ray 310, the magnitude of the angle of incidence of the light source 308 and the body portion 302. It depends on the relative position between the sides 316.
  • the shape of the prism portion 304 determined according to the relative position between the light source 308 and the inner surface 316 of the body portion 302 will be described in detail with reference to FIG. 15.
  • the refractive angle G is 0 °, 1 °, 2 °, 3 °,... Can be obtained.
  • the vertex angle between the body portion 302 and the reflecting portion 312 in the right triangle which is a cross section of the angle adjusting portion 314, is equal to the refractive angle G of the light ray 310, so the magnitude of the vertex angle is G.
  • the phosphorus interval L can be derived by the general formula. The process of obtaining the section L is as follows.
  • the refraction angle G is 0 °, 1 °, 2 °, 3 °,...
  • k is any positive rational number
  • a section in which the magnitude of the vertex angle is G may be derived as a general formula.
  • the light pipe 300 has a refractive index n and the light source 308 from the light source 308 to the point where the incidence angle is 0 ° on the inner surface 316 of the body portion 302.
  • the shape of the prism portion 304 is determined according to the distance h and the radius of curvature r of the circular arc constituting the cross section of the hollow 306.
  • the light ray 310 generated from the light source 308 is incident on the light pipe 300 and reflected from the prism portion 304 by the total reflection condition according to Snell's law.
  • the light rays 310 totally reflected by the prism portion 304 are totally reflected by the opposing prism portion 304 at the same angle of incidence and travel in the longitudinal direction of the light pipe 300.
  • the light ray 310 passes through the total reflection process at the first incident surface, and then enters the total incident reflection with respect to the relative incident surface of the first incident surface at the same incident angle as that of the first incident surface. Accordingly, the light ray 310 may travel in the longitudinal direction of the light pipe 300 while continuously generating total reflection at the prism portion 304.
  • the light pipe 300 when the light ray 310 proceeds at an angle of 90 ° with the center line of the light pipe 300, the incident angle from the prism portion 304 When the total reflection condition is satisfied, the light ray 310 satisfies the total reflection condition at any point of the prism portion 304, which is known in the case of the light pipe according to the first embodiment of the present invention with reference to FIG. 10. Same as seen.
  • FIG. 17 is a perspective view showing a light pipe according to a fourth embodiment of the present invention
  • FIG. 18 is a sectional view showing a light pipe according to a fourth embodiment of the present invention.
  • FIG. 18 is a cross-sectional view showing a light pipe according to a fourth embodiment of the present invention, wherein the light rays shown here represent only components horizontal to the cross section with respect to the light rays traveling in three dimensions inside the light pipe.
  • the light pipe 400 includes a body portion 402 and a prism portion 404.
  • the body portion 402 has a hollow 406 is formed to penetrate in the longitudinal direction, the hollow 406 is formed in the shape of a figure combined with two circular arcs and the same two straight lines facing each other with the same cross-section do.
  • the outer surface of the body portion 402 is provided with a plurality of prism portion 404 in the longitudinal direction, the prism portion 404 is composed of a reflecting portion 412 and the angle adjuster 414.
  • the light ray 410 generated from the light source 408 is reflected by the total reflection condition in the prism portion 404 according to Snell's law, and by repeating this process, the light ray 410 is the length of the light pipe 400. Proceed in the direction. In addition, since the medium filling the hollow 406 of the light pipe 400 is air, the light ray 410 may proceed with little transmission loss.
  • the light pipe 400 according to the fourth embodiment of the present invention has a conventional light pipe in that the cross section of the hollow 406 is formed in the shape of a figure in which two identical circular arcs and two same straight lines face each other. There is a distinctive feature.
  • the shape of the prism portion 404 is determined according to the relative positions of the light source 408 and the light pipe 400.
  • the angle of vertex between the body portion 402 and the reflecting portion 412 in the right triangle which is a cross section of the angle adjusting portion 414 constituting the prism portion 404, is determined by the light beam 410 of the light pipe 400. It is equal to the size of the angle of refraction when it is incident and refracted by the inner surface 416 of the body portion 402 to proceed in parallel with the cross section of the ().
  • the angle of refraction of the light ray 410 is determined according to the refractive index of the light pipe 400 and the angle of incidence of the light ray 410, the magnitude of the angle of incidence of the light source 408 and the body portion 402. It depends on the relative position between the sides.
  • the shape of the prism portion 404 determined according to the relative position between the light source 408 and the inner surface 416 of the body portion 402 is a portion and a circular arc formed in a cross-section of the hollow 406 It is determined individually for each part that consists of:
  • the portion constituted by the straight line is determined by Figs. 8 and 7 as in the case of the light pipe according to the first embodiment of the present invention.
  • the portion constituted by the arc is determined by Figs. 15 and 14 as in the case of the light pipe according to the third embodiment of the present invention.
  • the light ray 410 generated from the light source 408 is incident on the light pipe 400 and reflected from the prism portion 404 under total reflection conditions according to Snell's law.
  • the light rays 410 totally reflected by the prism portion 404 are totally reflected by the counter prism portion 404 at the same angle of incidence and travel in the longitudinal direction of the light pipe 400.
  • the light ray 410 undergoes total reflection at the first incident surface, and then enters the total incident reflection with respect to the relative incident surface of the first incident surface at the same incident angle as the incident angle at the first incident surface. Accordingly, the light ray 410 may travel in the longitudinal direction of the light pipe 400 while continuously generating total reflection at the prism portion 404.
  • the light pipe 400 according to the fourth embodiment of the present invention when the light beam 410 proceeds at an angle of 90 ° with the center line of the light pipe 400, the incident angle at the prism portion 404 When the total reflection condition is satisfied, the light ray 410 satisfies the total reflection condition at any point of the prism portion 404, which is known in the case of the light pipe according to the first embodiment of the present invention with reference to FIG. Same as seen.
  • the light pipe according to the fourth embodiment of the present invention has the advantage of being able to reduce the volume of the light pipe and to form a beautiful appearance when used for signage.
  • the vertex angle of the isosceles triangle constituting the cross section of the angle adjusting section is the inner surface (102, 202, 302, 402) of the body (102, 202, 302, 402) by the light beam (110, 210, 310, 410) generated from the light source proceeds in parallel with the cross section of the light pipe (100, 200, 300, 400) 116, 216, 316, and 416 are formed in the same size as the angle of refraction when incident and refracted. This is to allow the light beams 110, 210, 310, and 410 to travel in the longitudinal direction of the light pipes 100, 200, 300, and 400 while continuously generating total reflection.
  • FIG. 19 is an exploded perspective view showing the configuration of a light pipe according to a fifth embodiment of the present invention.
  • the light pipe 500 according to the fifth embodiment of the present invention further includes a filter unit 520 in the light pipe described in the first to fourth embodiments of the present invention. do.
  • the filter unit 520 converts a color of light generated from the light source 508.
  • the filter unit 520 includes a reflector 522 that reflects light rays generated from the light source 508.
  • the reflector 522 is located at one end of the light pipe 500, thereby reflecting the light beams generated from the light source 508 and proceeding to the other side of the light pipe 500.
  • the filter unit 520 includes a color filter 524.
  • the color filter 524 is disposed on the front surface of the reflector 522 and includes one or more colored layers 526. The light incident on the color filter 524 is converted in color while passing through the colored layer 526.
  • the color filter 524 is a circular glass plate, and is made of a material of a dichroic coating (Dichroic Coating), color glass or polycarbonate according to the purpose of the light pipe 500.
  • the color filter 524 is made of a material of the glass plate treated with a dichroic coating.
  • the filter unit 520 includes a motor 528 for rotating the color filter 524.
  • the motor 528 rotates the color filter 524 to convert the color of light emitted to the outside of the light pipe 500.
  • the light pipe 500 according to the fifth embodiment of the present invention may be applied as a device for converting white light generated from the light source 508 into various colors when used for a signage or various displays. That is, the light pipe 500 emits light of various colors to the outside by the light beams generated from the light source 508 passing through the color filter 524.
  • the prism portion and the light pipe are arranged in parallel, mass production is possible by extrusion of polycarbonate or acrylic resin, and the thickness of the light pipe maintains the shape of the light pipe according to the characteristics of the material. And can be determined within a range that can withstand external shocks.
  • the light pipe according to each embodiment of the present invention when the light pipe according to each embodiment of the present invention is applied to signage and display applications, uniform light emission is required on the surface of the light pipe.
  • the length of the light pipe When the length of the light pipe is short, light may be uniformly emitted from the surface.
  • total reflection may be performed by roughening a smooth surface or attaching a light diffusion film to the inside or the outside of the light pipe. It is desirable to allow light to be emitted out.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

La présente invention concerne un tube fluorescent. Le tube fluorescent (100) de la présente invention comprend un corps principal (102), lequel comprend un alésage creux (106) formé dans le sens de la longueur et, une pluralité de prismes (104) formés sur une surface extérieure du corps principal (102) dans le sens de la longueur. Chacun des prismes comprend une partie réfléchissante (112) possédant une section transversale en forme de triangle isocèle rectangle et, une partie réglage d'angle (114) interposée entre le corps principal (102) et la partie réfléchissante (112) et, cette partie réglage possède une section transversale avec un angle vertical dont la taille est déterminée par la position d'une source lumineuse. Cette partie réglage d'angle (114) présente la forme d'un triangle rectangle possédant une base inférieure formée par l'hypoténuse du triangle isocèle rectangle. Ce tube fluorescent est intéressant dans la mesure où il n'est pas nécessaire qu'une source lumineuse soit positionnée au centre de la section transversale du tube, ce qui améliore l'efficacité de fabrication. Par ailleurs, le tube fluorescent de l'invention possède une surface intérieure qui peut non seulement prendre la forme cylindrique mais également une grande variété de formes de sorte que ce tube fluorescent peut être utilisé dans des panneaux publicitaires et dans des afficheurs, réduisant ainsi la consommation électrique. Le tube fluorescent de l'invention est capable de transmettre la lumière à une certaine distance d'une manière efficace.
PCT/KR2009/000296 2008-02-04 2009-01-20 Tube fluorescent WO2009099276A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009801040817A CN101939674A (zh) 2008-02-04 2009-01-20 光管
US12/866,109 US20110002139A1 (en) 2008-02-04 2009-01-20 Light pipe

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2008-0011150 2008-02-04
KR20080011150 2008-02-04
KR1020080040602A KR100970741B1 (ko) 2008-02-04 2008-04-30 광 파이프
KR10-2008-0040602 2008-04-30

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WO2009099276A3 WO2009099276A3 (fr) 2009-10-29

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR870008206A (ko) * 1986-02-21 1987-09-25 도날드 밀러 셀 프리즘 광도파관에서 방사된 빛의 제어방법 및 장치
KR20010037014A (ko) * 1999-10-13 2001-05-07 성재갑 전반사 필름
KR20060107457A (ko) * 2002-01-23 2006-10-13 오므론 가부시키가이샤 면광원 장치, 확산판 및 액정표시 장치

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR870008206A (ko) * 1986-02-21 1987-09-25 도날드 밀러 셀 프리즘 광도파관에서 방사된 빛의 제어방법 및 장치
KR20010037014A (ko) * 1999-10-13 2001-05-07 성재갑 전반사 필름
KR20060107457A (ko) * 2002-01-23 2006-10-13 오므론 가부시키가이샤 면광원 장치, 확산판 및 액정표시 장치

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