JP3127340U - Optical fiber lens used for LED - Google Patents

Abstract

An optical fiber lens applied to an LED is provided.
The present invention mainly solves the problem of light aging diode (LED) plastic lenses that are easily aged and unfavorable in illumination. A glass fiber optic lens is installed on the LED, and an optical fiber. The lens is composed of multiple unit optical fibers with the same numerical aperture (NA) arranged and fused, and each unit optical fiber lens has a transparent core, and the outside of the transparent core is covered with a clad, and each unit optical fiber is arranged and fused. Is a lens to be used. With this design, the illumination angle of the LED is changed by different optical fiber lenses with different NAs, and the LED gets a favorable illumination.
[Selection] Figure 1

Description

The present invention relates to an optical fiber lens used in an LED, and more particularly to an improvement in the basic structure of an optical fiber lens in a light emitting diode.

As shown in FIG. 16, the general light emitting diode (LED) structure includes a base 20, a light emitting element 21 such as GaN in the base 20, and a plastic lens 22 that covers the outside of the light emitting element 21. Thus, the protection of the light emitting element 21 and the light collecting effect are achieved.

In recent years, there have been improvements to light-emitting diode lenses. For example, in the idea of Taiwan Patent Certificate No. M245555 “Lens Unit for Increasing Light Intensity and its LED Signal Light”, a plurality of lens units are used. The lens disk is a folding / condensing unit that is composed of a disk-shaped main body and a stereotaxic column and is closely arranged on the disk-shaped main body and corresponds to a homogenous light source of a plurality of LED points. Each lens unit is a reflection / condensing unit, which is a rectangular pattern arranged horizontally or vertically (or horizontally / vertically) on one surface, or a small curved convex lens on the surface of each reflection / condensing unit. Each folding / condensing unit presents a single convex lens or a biconvex lens with rectangular patterns arranged horizontally or vertically (or horizontally / vertically).

1. The light-emitting diode shown in FIG. 7 is covered with a plastic lens 22, and the plastic lens 22 is likely to be aged and atomized by ultraviolet irradiation after a certain period of use (about 1 year), and the translucency of the lens 22 is preferable. It does not affect the LED lighting.
2. In addition, the known plastic lens 22 generates a light beam shielded by shadows due to the folding phenomenon of the plastic lens 22 after the light beam irradiation, and affects the illumination effect of the LED.
3. Furthermore, according to the idea of the aforementioned Taiwanese Patent M245555, a large number of circular light spots arranged in a close arrangement or a “folding / condensing unit” of a rectangular pattern are formed on the lens surface of the arc surface. Such a design has the effect of folding and condensing, but the lens is made of plastic, and there are problems similar to those described above, such as plastic aging and atomization.

  When these lenses are processed by glass, processing on the glass surface of the arc surface is troublesome to manufacture, and the surface processing of lenses with many illumination changes becomes complicated, and manufacturing difficulty and cost are also low. Get higher.

The present invention provides an optical fiber lens to be applied to an LED, fuses optical fiber cores, and arranges a plurality of unit optical fibers with the same numerical aperture (NA). The optical fiber of each unit is a transparent core. (Core), and the outside of the transparent core is coated with a cladding (Cladding) to solve the above problems.

  The structure of the present invention is that the optical fiber of each unit is a circular core, hexagonal core, octagonal core, colored transparent core, the core cross section is circular, elliptical, hexagonal, and each unit optical fiber in the core is the center of the lens Is a pyramid arrangement structure that exhibits a relative arrangement of oblique angles.

The following effects can be obtained by the present invention.
1. Illumination is preferred: Each unit optical fiber in the optical fiber lens of the present invention is a single transmission beam, so when a glass fiber optic lens is applied to the LED, the illumination intensity is better than the LED of the known plastic lens, doing it clearly.
2. Easy to manufacture: The structure of the present invention is an optical fiber of a unit consisting of a plurality of glasses, fused to an optical fiber lens by a vacuum high temperature method, polished on both sides, flattened, or made into an arc-shaped uneven mold, The lighting effect of condensing change can be achieved.
3. Aging and discoloration due to the influence of ultraviolet rays and long service life: The optical fiber of each unit of the present invention is made of glass. Therefore, even if it is exposed to the outside for a long time, the illumination intensity can be affected by irradiation with ultraviolet rays. Long service life.
4). Reduce the volume of the LED: The optical fiber lens of the present invention is manufactured in a flat plate shape and installed directly above the LED light emitting element, effectively reducing the LED lens height and reducing the LED volume.

  The present invention is an optical fiber lens applied to an LED. As shown in FIG. 1, the core of the optical fiber lens 10 includes a plurality of optical apertures 11 of the same numerical aperture (Numerical Aperture, NA) unit. The optical fiber 11 of the unit has a transparent glass core 110, and the transparent core 110 has a hexagonal shape, a circular shape, or an elliptical shape. In addition, the transparent core 110 is formed from a colored transparent glass. May be.

  Further, as shown in FIG. 1, the outside of each transparent core 110 covers a clad 111 having a different folding rate. The optical fiber 11 of each unit is arranged in a circular core (FIG. 1), and the outer periphery of the core is further covered with an outer cladding 12, and an optical fiber bundle rod is formed by high-pressure vacuum welding. The clad 12 is polished to complete the optical fiber lens of the present invention.

  When the present invention is applied to an LED, as shown in FIGS. 2 to 4, the optical fiber lens 10 of the present invention can be installed directly above the light emitting element 21 of the LED base 20 (FIG. 2). After the LED emits a light beam, the light beam generates a certain illumination range depending on the numerical aperture NA of the core 110 of each unit optical fiber 11, and the illumination range is different if the NA set by the core 110 is different.

  As shown in FIG. 3, when the NA of the core 110 of each unit optical fiber 11 is 0.1, the light exit angle generated by the light entering the core 110 is 11 degrees. When implemented, the effect of direct exposure to the illumination range (L1) is obtained.

  As shown in FIG. 4, when the NA of the core 110 of each unit optical fiber 11 is 0.44, the light exit angle generated by the light entering the core 110 is 52 degrees, so the present invention is implemented. The LED achieves an illumination effect with an angular diffusion illumination range (L2). As can be seen from this, the present invention can manufacture optical fiber lenses 10 with different NAs. Depending on the lighting requirements of the LED designer, an appropriate optical fiber lens 10 can be used as an LED lens, and the LED illumination range can be adjusted. Make adjustments more flexible and standardized so that they can be selected.

  In addition, as shown in FIG. 5, the optical fiber 11 of each unit of the present invention forms a hexagonal core optical fiber lens 100. Further, as shown in FIG. 6, each unit optical fiber 11 of the present invention may be an octagonal core optical fiber lens 10.

  As shown in FIG. 7, when the surface of the optical fiber lens 10 is polished into an arcuate surface 13, and the optical fiber lens 10 forms a convex lens form and is attached to the LED base 20, a large illumination range (L3) can be formed. it can.

  As shown in FIG. 8, the surface of the optical fiber lens 10 is polished to the arc concave surface 14, and the optical fiber lens 10 forms a concave lens shape, and when the LED base 20 is mounted, a reduced illumination range (L4) is formed. To do.

  As shown in FIG. 9, the lens of the present invention is integrally heat-pressed to the arched optical fiber lens 10 by a casting method at the time of manufacture, and the optical fiber lens 10 forms a similar convex lens and is installed on the LED base 20. At that time, the illumination range (L3) is further expanded.

  As shown in FIGS. 10 to 15, when the lens of the present invention is manufactured, at the same time as vacuum high temperature fusion, each unit optical fiber 11 in the core is obliquely arranged or expanded with respect to the lens center (S) A columnar arrangement structure of arrangement or a fan-shaped arrangement structure is formed.

  As shown in FIG. 10, each unit optical fiber 11 forms an oblique pyramid arrangement that inwardly shrinks toward the lens center (S), and the light beam that passes through the optical fiber lens 10 is a relative oblique weight of each unit optical fiber 11. The light is focused at the focal point (F) by state guidance.

  As shown in FIG. 11, the optical fiber lens 10 having a conical arrangement in which each unit optical fiber 11 is contracted toward the lens center (S) has its top surface polished to an arc-shaped surface 13 to provide an optical fiber according to the present invention. An embodiment of a convex lens of the lens 10 is configured.

  As shown in FIG. 12, the optical fiber lens 10 having a conical arrangement in which each unit optical fiber 11 is contracted inward toward the lens center (S) has its top surface polished to an arc concave surface 14 to provide the optical fiber lens of the present invention. Constitutes an embodiment of ten concave lenses.

  As shown in FIG. 13, each unit optical fiber 11 of the optical fiber lens 10 of the present invention forms a fan-like arrangement that expands outward toward the lens center (S), and the light beam that passes through the optical fiber lens 10 passes through each unit optical fiber 11. Induction produces a larger range of illumination.

  As shown in FIG. 14, the optical fiber lens 10 in the fan-like arrangement in which each unit optical fiber 11 is developed outward toward the lens center (S) has its top surface polished to an arc-shaped surface 13 to form a convex lens-shaped optical fiber lens 10. Form. Further, as shown in FIG. 15, the top surface of the optical fiber lens 11 is polished to an arc concave surface 14 to form another optical fiber lens 10 in the form of a concave lens.

It is sectional drawing of the optical fiber lens of this invention. It is a local three-dimensional sectional view when the optical fiber lens of the present invention is implemented with LEDs. It is a figure which shows the irradiation range when implementing the optical fiber lens of this invention with LED. It is a figure which shows another irradiation range when implementing the optical fiber lens of this invention with LED. It is sectional drawing by another Example of the optical fiber lens of this invention. FIG. 6 is a cross-sectional view of still another embodiment of the optical fiber lens of the present invention. FIG. 6 is a cross-sectional view of still another embodiment of the optical fiber lens of the present invention. FIG. 6 is a cross-sectional view of still another embodiment of the optical fiber lens of the present invention. FIG. 6 is a cross-sectional view of still another embodiment of the optical fiber lens of the present invention. It is sectional drawing by the Example of the conical arrangement of the optical fiber lens of this invention. It is sectional drawing by another Example of the conical arrangement of the optical fiber lens of this invention. It is sectional drawing by another Example of the conical arrangement of the optical fiber lens of this invention. It is sectional drawing by the Example of the fan-shaped arrangement | sequence of the optical fiber lens of this invention. It is sectional drawing by another Example of the fan-shaped arrangement | sequence of the optical fiber lens of this invention. FIG. 6 is a cross-sectional view of still another embodiment of the fan-like arrangement of the optical fiber lens of the present invention. It is a local solid sectional view of a known LED structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical fiber lens 100 Optical fiber lens 101 Optical fiber lens 11 Unit optical fiber 110 Transparent core 111 Cladding 12 Outer cladding 20 Base 21 Light emitting element 22 Plastic lens
L1-L5 lighting range
S lens center
F focus

Claims (10)

An optical fiber lens applied to an LED, wherein the optical fiber core is formed by arranging a plurality of unit optical fibers having the same numerical aperture, each unit optical fiber has a transparent core, and the outside of the transparent core is coated with a cladding. Optical fiber lens applied to LED, characterized by The optical fiber lens applied to the LED according to claim 1, wherein each unit optical fiber is arranged in a circular, hexagonal, or octagonal core. 2. The optical fiber lens applied to an LED according to claim 1, wherein each of the unit optical fibers is a colored transparent glass. 2. The optical fiber lens applied to an LED according to claim 1, wherein the core cross section of each unit optical fiber is circular, elliptical, hexagonal, and polygonal. 2. The optical fiber lens applied to an LED according to claim 1, wherein each unit optical fiber in the optical fiber lens core has a pyramid arrangement structure with an oblique relative arrangement with respect to the center of the lens. 2. The optical fiber lens applied to the LED according to claim 1, wherein each unit optical fiber in the optical fiber lens core forms an arrangement in which the inner optical fiber is inclined toward the center of the lens. 2. The optical fiber lens applied to the LED according to claim 1, wherein each unit optical fiber in the optical fiber lens core forms an oblique fan-shaped arrangement extending outward toward the center of the lens. 8. The optical fiber lens applied to an LED according to claim 1, wherein the surface of the optical fiber lens is polished into an arc-shaped surface. The optical fiber lens applied to an LED according to claim 1, wherein the surface of the optical fiber lens is polished into an arc concave surface. 8. The optical fiber lens applied to an LED according to claim 1, wherein the optical fiber lens is an arch type optical fiber lens.

Images