TWM473525U - Optical lens - Google Patents

Description

optical lens

The present invention relates to an optical lens, and more particularly to an optical lens in which microlenses are arranged in a spiral shape to uniform the output source of the LED and to improve the output light pattern.

Light Emitting Diode (LED) is a kind of semiconductor component. We convert electrical energy into light energy by semiconductor compound to achieve luminous effect. The light-emitting diode has high energy conversion efficiency at low light level, so it has power consumption. It has the advantages of small quantity, long life, high stability, and no ultraviolet radiation. It has been widely used in general household, commercial office, outdoor and mobile lighting, and replaces traditional non-directional illumination such as lamps and incandescent bulbs. source.

Since the light-emitting diodes use a combination of a blue light wafer and a fluorescent powder to emit white light, the concentration of the fluorescent powder and the placement position may cause uneven output of the light source, thereby affecting the illumination quality and causing the user to reduce the use. Willingness.

In view of the above, a device using a light-emitting diode as a light source is often provided with a light guiding element/lens to guide the light outward to achieve uniform light output. A conventional light guiding lens 100 as shown in FIG. 1a utilizes a microlens 12 (Micro Lens) arranged in a honeycomb shape, wherein the microlenses have a radius of curvature R, and the tops of each microlens are spaced apart from each other by an arrangement pitch. The P is provided to improve the uneven light of the light-emitting diode, so that the light source output in the local area is relatively uniform.

However, as shown in FIG. 1b, although the honeycomb arrangement of the conventional light guiding lens can diffuse light, the honeycomb arrangement causes the microlens to assume a hexagonal shape, and the light passes through these hexagonal microlenses, which makes The edge light pattern is hexagonal.

Therefore, the present invention provides an optical lens to solve the problem of uneven output light source of the light emitting diode and to improve the output light type.

The technical means used in the present invention to solve the problems of the prior art is an optical lens, which is suitable for a light source, comprising: a lens base having a light incident side and a light exiting side, the light incident side being adjacent to the light source, and the lens base body. A plurality of sub-lens portions are disposed on the light-emitting side, and the sub-lens portions are arranged in a spiral shape on the light-emitting side, wherein the sub-lens portions have the same or different radiance of curvature of the illuminating surface, and the same or different arrangement pitches.

In an embodiment of the present invention, the lens base further includes a receiving groove on the light incident side, and the light source is received in the receiving groove.

In an embodiment of the present invention, the light-emitting surface of the sub-lens portions is a polygonal surface.

In an embodiment of the present invention, the light exiting surface of the sub-lens portions is a curved surface.

In an embodiment of the present invention, the spiral shape of the sub-lens portions arranged on the light-emitting surface is a single spiral arm.

In an embodiment of the present invention, the helical shape of the sub-lens portions arranged on the light-emitting surface is a multi-rotor arm.

In an embodiment of the present invention, the lens base has a central light exiting surface at the center of the light exiting side, and the sub-lens portions are arranged at the periphery of the central light exiting surface.

By adjusting the technical means used in this creation, by adjusting each sub-perforation The spacing between the mirror portions or the radius of curvature is changed, and the light of the light-emitting diode can be uniformly diffused through the sub-lens portion to prevent the output light from being excessively concentrated in certain regions. In addition, since the sub-lens portions are arranged in a spiral shape on the light-emitting side, when the output light source of the edge is gradually weakened, the outer-edge contour of the output light pattern remains circular, thereby improving the output light pattern.

The specific embodiments of the present invention will be further described by the following examples and accompanying drawings.

Referring to Figures 2a to 2d, Figure 2a shows a side view of the optical lens of the first embodiment of the present invention, and Figure 2b shows a top view of the first embodiment of the present creation, and Figure 2c shows the second embodiment. A schematic cross-sectional view of the first embodiment of the present invention, and a second diagram showing the illuminance map of the first embodiment of the present creation.

Referring to FIGS. 2a to 2d, the optical lens 100a according to the first embodiment of the present invention is applied to a light source L, and includes a lens substrate 1. The lens substrate 1 is a cup-shaped structure having an upper width and a lower width, and has a light-incident side S1 and a light-emitting side S2, and includes a receiving groove 11 and a plurality of sub-lens portions 12a. The lens base 1 can be made of a transparent material such as silicone, acryl, glass or polycarbonate. The accommodating groove 11 is disposed at the bottom of the lens base 1 adjacent to the light incident side S1, and the light source L can be accommodated therein. The shape of the accommodating groove 11 may be U-shaped or may have a plurality of protrusions on the inner wall surface to change the direction of the light of the light source L, so that the output light is more concentrated or diverged, and the creation is not limited thereto. Required.

The sub-lens portion 12a is composed of a plurality of microlenses which are convexly disposed on the light-emitting side S2 of the lens base 1 and have a light-emitting surface and a light-emitting surface radius of curvature, and the light-emitting surface end of each of the sub-lens portions 12a is The ends of the light-emitting surfaces of the other sub-lens portions 12a are spaced apart from each other by an arrangement pitch. In this reality In the embodiment, the light-emitting surface of each of the sub-lens portions 12a is a curved surface, and all have the same radius of curvature R1. When disposed, each of the sub-lens portions 12 is spaced apart by a different arrangement pitch, and the plurality of sub-lens portions 12a are on the light-emitting side S2. The center is the origin, and is arranged in a spiral shape above the light exiting side S2, and the spiral is a single spiral arm. Incidentally, the facet surface of the sub-lens portion 12a may be a triangular face, a quadrangular face, a pentagonal face, or other polygonal face, as needed. In the present embodiment, the shape of the sub-lens portions 12a includes a pentagonal surface and a quadrangular surface.

Specifically, as shown in Fig. 2c, the sub-lens portions 121a to 123a have the same curvature radius R, and the arrangement pitch of the sub-lens portion 121a and the tip end of the light-emitting surface of the sub-lens portion 122a is P1, and the sub-lens portion 122a and the sub-lens portion 122a The arrangement pitch of the tips of the light-emitting surfaces of the lens portion 123a is P2, that is, the sub-lens portions 121a, 122a, and 123a are spaced apart by a different arrangement pitch. However, in other embodiments, the sub-lens portions 121a, 122a, and 123a may have the same radius of curvature R and be spaced apart by the same arrangement pitch P (i.e., P1 = P2).

In detail, when the light source L emits light, the light enters the lens substrate 1 from the light incident side S1 and is transmitted to the light exiting side S2 to enter the sub-lens portion 12a. The light is evenly distributed through the light exiting surface of the sub-lens portion 12a. The area needed. Since the sub-lens portion 12a is spirally arranged on the light-emitting side S2, when the output source of the edge is weakened, the outer contour of the output light pattern remains circular, as shown in FIG. 2d, thereby making it The output light pattern of the light-emitting diode is improved, so that the output light pattern can be improved to be circular. Further, by adjusting the arrangement pitch between each of the sub-lens portions 12a, the light of the light source L can be concentrated/diffused to the desired region by the sub-lens portion 12a, and the output light of the light-emitting diode is prevented from being excessively concentrated/diffused to a specific region. And make the light output more uniform.

Please refer to Figure 3a and Figure 3b. Figure 3a shows the creation. 2 is a top view of the optical lens of the second embodiment, and FIG. 3b is a cross-sectional view showing the optical lens of the second embodiment of the present invention. As shown, it is the optical lens 100b of the second embodiment of the present invention and is similar to the optical lens 100a of the first embodiment, but the difference is that each sub-lens portion 12b of the optical lens 100b has a different radius of curvature and Arrange the spacing. As shown in FIG. 3b, the curvature radii of the sub-lens portions 121b, 122b, and 123b are R1, R2, and R3, respectively, and the arrangement pitch of the sub-lens portion 121b and the sub-lens portion 122b is P1, and the sub-lens portion 122b and the sub-lens portion. The arrangement pitch of 123b is P2. With such an arrangement, the manufacturer can adjust the radius of curvature of the sub-lens portion 12b as needed, so that the output light of the output light source of the light-emitting diode is more uniform than the optical lens 100a.

In addition to the above-described arrangement, the plurality of sub-lens portions 12b can be disposed on the light-emitting side S2 with different curvature radii and the same arrangement pitch, and the effect of uniformly outputting the light source and improving the output light pattern can be achieved.

Depending on the output light type, there may be other variations in the spiral shape in which the sub-lens portions are arranged. Referring to FIGS. 4 to 6, FIG. 4 to FIG. 6 are views showing the optical lens of the third to fifth embodiments of the present invention. As shown in Fig. 4, it is the optical lens 100c of the third embodiment of the present invention. It is similar to the optical lens 100a of the first embodiment, but has a circular central light-emitting surface Sc at the center of the light-emitting side S2, and each of the sub-lens portions 12c is arranged in a single rotation from the outer edge contour of the central light-emitting surface. Since the arm is spiral, the optical lens 100c can form an output light pattern different from the optical lens 100a of the first embodiment. It should be noted that the central light-emitting surface Sc may be a convex surface, a concave surface or a flat surface, and the shape of the central light-emitting surface Sc may be any shape, and the present invention is not limited thereto. Figure 5 shows an optical lens 100d of the fourth embodiment of the present invention, which is optical with the second embodiment. The lens 100b is similar, but the difference is that each of the sub-lens portions 12d is arranged from the center to the center of the light-emitting side S2 in a spiral shape of a double-wrap arm, and thus an output light different from the optical lens 100b of the second embodiment can be formed. type. Fig. 6 is a view showing an optical lens 100e according to a fifth embodiment of the present invention, which is different from the optical lens 100d of the fourth embodiment in that the sub-lens portion 100e is arranged in a spiral shape of a three-legged arm, and thus can be formed and fourth. The optical lens 100d of the embodiment is different in output light type.

In addition to the spiral shape described above, the optical lens of the present invention can also be provided with a plurality of sub-lens portions by a spiral involute of a multi-spiral arm, a Fermat spiral or other spirals, depending on actual needs and applications.

According to the above configuration, the sub-lens portions 12a of the optical lens 100a of the present invention are arranged in a spiral shape to improve the output light pattern, and the arrangement pitch and the curvature radius of the sub-lens portions 12a can be the same or different, and thus According to the actual application, the light is evenly outputted or the output light is concentrated in the desired area, so that the illumination of the LED is more efficient and widely used.

It can be seen from the above embodiments that the optical lens provided by the present invention has industrial use value, so the original operation has been in conformity with the requirements of the patent. The above description is only for the preferred embodiment of the present invention, and those skilled in the art can make other improvements according to the above description, but these changes still belong to the creative spirit of the creation and the following definitions. In the scope of patents.

100‧‧‧Conventional Light Guide Lens

100a, 100b, 100c, 100d, 100e‧‧‧ optical lenses

1‧‧‧Lens base

11‧‧‧ accommodating slots

12‧‧‧Microlens

12a, 12b, 12c, 12d, 12e‧‧‧ sub-lens

P, P1, P2‧‧‧ arrangement spacing

R, R1, R2, R3‧‧‧ radius of curvature

S1‧‧‧ light side

S2‧‧‧ light side

Sc‧‧‧Central glazing

Fig. 1a shows a top view of a conventional light guiding lens; Fig. 1b shows a schematic cross-sectional view of a conventional light guiding lens; Fig. 1c shows a conventional light guiding lens with x as a horizontal axis and y Illumination diagram of the xy plane of the vertical axis; Figure 2a shows the side view of the optical lens of the first embodiment of the present invention Figure 2b is a top view of the optical lens of the first embodiment of the present invention; Figure 2c is a schematic cross-sectional view showing the optical lens of the first embodiment of the present invention; The illuminance diagram of the optical lens of an embodiment; the 3a is a top view of the optical lens of the second embodiment of the present invention; and the 3b is a schematic cross-sectional view of the optical lens of the second embodiment of the present invention; 4 to 6 are views showing an upper view of the optical lenses of the third to fifth embodiments of the present invention.

100a‧‧‧ optical lens

12a‧‧‧Sub-lens section

S2‧‧‧ light side

Claims (7)

An optical lens is applied to a light source, comprising: a lens base having a light incident side and a light exiting side, the light incident side being adjacent to the light source, wherein the lens base body is provided with a plurality of sub-lens portions on the light exiting side, The sub-lens portions are arranged in a spiral shape on the light-emitting side, wherein the sub-lens portions have the same or different radiance of curvature of the illuminating surface, and the same or different arrangement pitch. The optical lens of claim 1, wherein the lens base further comprises a receiving groove on the light incident side, the light source being received in the receiving groove. The optical lens of claim 1, wherein the light-emitting surfaces of the sub-lens portions are polygonal faces. The optical lens of claim 1, wherein the light-emitting surfaces of the sub-lens portions are a curved surface. The optical lens according to claim 1, wherein the spiral portions of the sub-lens portions arranged on the light-emitting surface are single-rotating arms. The optical lens according to claim 1, wherein the spiral shape of the sub-lens portions arranged on the light-emitting surface is a multi-rotor arm. The optical lens according to claim 1, wherein the lens substrate has a central light-emitting surface at a center of the light-emitting side, and the sub-lens portions are arranged at a periphery of the central light-emitting surface.