TWM508040U - Optical element - Google Patents

Description

Optical element

The invention relates to a light-emitting element, and in particular to an optical component suitable for changing a light-emitting angle, a luminosity distribution and an illuminance distribution of a light source generated by a light-emitting diode element, thereby adjusting an illumination area to meet different requirements of various types of lamps.

In recent years, the lighting market has been experiencing a wave of reforms due to its low power consumption, high efficiency and long life, which makes the LEDs widely used in displays instead of traditional light sources. And indoor and outdoor lighting, such as: street lights, table lamps or decorative light sources.

Compared with the conventional light source, the light-emitting diode has a small light-emitting angle, so that the entire illumination range is limited when applied to a lamp; or, because the forward light-emitting intensity is higher than the side light-emitting intensity, a uniform illumination effect cannot be provided.

Therefore, it is necessary to improve the projection illuminance, the illuminating angle, and the light uniformity caused by the small light-emitting angle of the light-emitting diode light source and the forward light intensity through the secondary optics.

One aspect of the present disclosure is to provide an optical component for changing illumination, illumination angle, and light uniformity of a light-emitting diode.

In an embodiment of the present invention, an optical component includes an optical lens having a light incident portion and a light exit portion connected to the light incident portion. The outer diameter of the light portion is larger than the outer diameter of the light-incident portion, and the outer diameter of the light-incident portion decreases as it goes away from the light-emitting portion, and the light-incident portion is formed with a groove, a plurality of light-guiding regions from the inside and the outside at the opposite connection light-emitting portion. In the total reflection area, the light guiding area surrounds the groove concentrically, and the total reflection area surrounds the light guiding area.

The light guiding regions may be designed to have the same height or different heights; when the light guiding regions are designed to have the same height, the distance between the bottom end and the bottom surface of the light guiding region may be increased along with the central axis away from the optical lens, or the light guiding region The distance between the bottom end and the bottom surface may decrease with a distance from the central axis of the optical lens; and when the light guiding area is designed to have different heights, the distance between the bottom end and the bottom surface of the light guiding area may be a certain value. Second, the light guiding regions can also be designed to have the same width or different widths.

In addition, the recess of the optical lens comprises a top wall which can be designed to be a flat surface, a convex surface or a concave surface, wherein when the top wall is convex, the passing light can be concentrated, and when the top wall is designed as a concave surface, it can diverge through The light.

Moreover, the light incident portion further comprises a surrounding wall, which is a surface adjacent to the light guiding region, and the surrounding wall is composed of a plurality of adjacent microlenses, and the microlenses are respectively convex arc columns to provide light mixing. The effect and increase the visual aesthetics.

With the design of the present invention, the illuminance, the illuminating angle and the light uniformity of the passing light can be effectively changed.

1, 1a, 1b, 3‧‧‧ optical lens

10, 10a, 10b, 30‧‧‧ into the Department of Light

100, 100a, 100b, 300‧‧‧ grooves

101‧‧‧ bottom

102, 102a, 102b, 302‧‧‧ light-guiding area

103, 303‧‧‧ total reflection zone

104, 104a, 104b, 304‧‧‧ top wall

108, 308‧‧‧ surrounding wall

110‧‧‧Microlens

111, 311‧‧‧ first connecting wall

112, 312‧‧‧ second connecting wall

12, 32‧‧‧Lighting Department

313‧‧ ‧ lens

4‧‧‧Reflecting ring

5‧‧‧Lighting diode

Θ‧‧‧ angle

D1‧‧‧first distance

D2‧‧‧Second distance

D3‧‧‧ third distance

H1‧‧‧first height

H2‧‧‧second height

H3‧‧‧ third height

W1‧‧‧first width

W2‧‧‧second width

W3‧‧‧ third width

1 is a perspective view of an optical element according to a first embodiment of the present invention.

2 is a cross-sectional view showing the optical element of the first embodiment of the present invention.

3 is a perspective view of the optical element of the second embodiment of the present invention.

4 is a cross-sectional view showing the optical element of the second embodiment of the present invention.

Fig. 5 is a cross-sectional view showing the optical element of the third embodiment of the present invention.

6 is a perspective view of an optical element according to a fourth embodiment of the present invention.

Figure 7 is a cross-sectional view showing the optical element of the fourth embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will be better understood from the following description of the preferred embodiments.

1 and 2 are respectively a perspective view and a cross-sectional view of the optical component of the first embodiment of the present invention. The optical component (not separately labeled) is applied to at least one of the light-emitting diodes, thereby changing the light intensity distribution of the light emitted by the light-emitting diode (ie, changing the light pattern of the light emitted by the light-emitting diode).

The optical element comprises an optical lens 1 which is made of plastic, glass, silicone or other light transmissive material, and has a light incident portion 10 and a light exit portion 12 connected to the light incident portion 10. The light exit portion 12 has a disk shape, and the outer diameter of the light exit portion 12 is larger than the outer diameter of the light incident portion 10. The outer diameter of the light incident portion 10 decreases as it goes away from the light exit portion 12, and the light incident portion 10 is connected to the light exit portion 12 oppositely. A groove 100, a plurality of light guiding regions 102 and a total reflection region 103 are formed from the inside to the outside. The light guiding region 102 surrounds the groove 100 concentrically, and the total reflection region 103 surrounds the light guiding region 102. The light incident portion 10 further includes a bottom surface 101, and the groove 100 and the light guiding region 102 are respectively recessed from the bottom surface 101 toward the light exit portion 12. The light incident portion 10 and the light exit portion 12 are integrally formed.

The thickness of the light guiding region 102 decreases as it moves away from the light exit portion 12, and the side profile from the optical lens 1 Viewed, the light guiding region 102 is generally tapered. The light emitting element is disposed on the light incident portion 10 and located below the groove 100. The light guiding region 102 is configured to transmit the divergent light generated by the light emitting element toward the light exiting portion 12, wherein the light guiding region 102 mainly changes the light transmitting direction by the principle of total reflection.

In the present embodiment, the optical lens 1 includes three light guiding regions 102. However, in actual implementation, the number of light guiding regions 102 can be adjusted according to actual required illumination, illumination angle, and light uniformity. As shown in FIG. 2, the bottom end of the light guiding region 102 closest to the groove 100 has a first distance d1 between the bottom end and the bottom surface 101, and has a first width w1 and a first height h1; The bottom end of the light guiding area 102 has a second distance d2 between the bottom end and the bottom surface 101, and has a second width w2 and a second height h2; the bottom end of the light guiding area 102 farthest from the groove 100 and the bottom surface 101 There is a third distance d3 between the three, and a third width w3 and a third height h3.

The second width w2 is the same as the first width w1, and the third width w3 is also the same as the first width w1; in other words, the light guiding regions 102 have the same width. The second height h2 is the same as the first height h1, and the third height h3 is also the same as the first height h1; in other words, the light guiding regions 102 have the same height. The first distance d1 is smaller than the second distance d2, and the second distance d2 is smaller than the third distance d3; in other words, the distance between the light guiding regions 102 and the bottom surface 101 increases as moving away from a central axis of the optical lens 1.

The light incident portion 10 includes a top wall 104 and a surrounding wall 108. The surrounding wall 108 is a surface where the total reflection region 103 is adjacent to the light guiding region 102. The surrounding wall 108 is composed of a plurality of adjacent microlenses 110. In the present embodiment, the microlenses 110 are each formed in a convex arc shape and may be parallel or at an angle to the central axis, and are radially convex toward the central axis of the optical lens 1. Wherein, the aforementioned central axis may be, for example, the light of the optical lens 1, and the optical lens 1 is centered on the central axis and disposed symmetrically with respect to the central axis. Microlens 110 The design can change the light transmission path, which provides a light mixing effect and can effectively increase the visual aesthetics. The light incident portion 10 further includes a first connecting wall 111 and a second connecting wall 112 that are alternately arranged between the top wall 104 and the surrounding wall 108. The top wall 104 is adjacent to one of the first connecting walls 111, and the angle θ between the top wall 104 and the first connecting wall is an obtuse angle greater than ninety degrees. In practical applications, the angle θ can also be designed as a right angle according to actual needs.

3 and 4 are a perspective view and a cross-sectional view of an optical component according to a second embodiment of the present invention. In the optical elements shown in Figs. 3 and 4, the optical lens 1a is similar to the optical lens 1 of the first embodiment, and the same elements are designated by the same reference numerals. It is worth noting that the difference between the two lies in the design of the light entering section 10.

In the present embodiment, the top wall 104a of the groove 100a of the light incident portion 10a is designed to be convex and protrudes in a direction opposite to the light exit portion 12, whereby the passing light can be effectively concentrated.

Further, in the present embodiment, the light guiding regions 102a have different widths and different heights, respectively. The light guiding area 102a closest to the groove 100a has a first width w1 and a first height h1, and the light guiding area 102a of the second adjacent groove 100a has a second width w2 and a second height h2, which is farthest from the groove 100a. The light guiding region 102a has a third width w3 and a third height h3. The light guiding regions 102a have different widths, the second width w2 is greater than the first width w1, and the third width w3 is greater than the first width w1. The light guiding regions 102a have different heights, wherein the second height h2 is greater than the first height h1, and the first height h1 is smaller than the third height h3. Moreover, the distance between the bottom end of the light guiding regions 102a and the bottom surface 101 is d.

The light guiding region 102a mainly changes the direction of light transmission by the principle of total reflection. The light regions 102a have different widths and heights, so that the total reflection angle of the light transmitted thereto is different, so that the uniformity of the passing light can be effectively changed. The functions and related descriptions of the other elements of the optical lens 1a are substantially the same as those of the optical lens 1 of the first embodiment, and will not be described herein.

5 is a cross-sectional view of an optical element according to a third embodiment of the present invention. In the optical element shown in Fig. 5, the optical lens 1b is similar to the optical lens 1 of the first embodiment, and the same elements are denoted by the same reference numerals. It is worth noting that the difference between the two lies in the design of the light incident portion 10b.

In the present embodiment, the top wall 104b of the groove 100b of the light incident portion 10b (not shown) is designed to be concave and recessed toward the light exit portion 12, whereby the passing light can be scattered.

The light guiding region 102b closest to the groove 100b has a first width w1 and a first height h1, and the light guiding region 102b adjacent to the groove 100b has a second width w2 and a second height h2, and the light guide farthest from the groove 100b The region 102b has a third width w3 and a third height h3. The second width w2 is the same as the first width w1, and the third width w3 is also the same as the first width w1; in other words, the light guiding regions 102b have the same width. The second height h2 is greater than the first height h1, and the third height h3 is greater than the first height h1; in other words, the heights of the light guiding regions 102b increase as they move away from the groove 100b. The first distance d1 is greater than the second distance d2, and the second distance d2 is greater than the third distance d3; in other words, the distance between the light guiding regions 102 and the bottom surface 101 decreases as moving away from the central axis of the optical lens 1b. The functions and related descriptions of the other elements of the optical lens 1b are substantially the same as those of the optical lens 1 of the first embodiment, and will not be described herein.

Referring to FIG. 6 and FIG. 7, the optical component of the fourth embodiment of the present invention is divided into Body map and section view. An optical component (not otherwise labeled) is applied to at least one of the light-emitting diodes 5 to change the light intensity distribution of the light emitted by the light-emitting diode. The optical element includes an optical lens 3 and a reflection ring 4.

The optical lens 3 is made of plastic, glass, silicone or other light transmissive material, and has a light incident portion 30 and a light exit portion 32 connected to the light incident portion 30. The outer diameter of the light-emitting portion 32 is larger than the outer diameter of the light-incident portion 30, and the outer diameter of the light-incident portion 30 decreases as it goes away from the light-emitting portion 32. The light-incident portion 30 is formed with a groove from the inside to the outer portion of the light-emitting portion 32. 300, a plurality of light guiding regions 302 and a total reflection region 303, the light guiding region 302 surrounds the groove 300 concentrically, and the total reflection region 303 surrounds the light guiding region 302.

The groove 300 has a top wall 304, and the top wall 304 is convexly curved in a direction opposite to the light exit portion 32. The light guiding region 302 has a frustoconical shape as viewed from a side cross section of the optical lens 3. In the present embodiment, the optical lens 3 includes two light guiding regions 302, and the light guiding regions 302 have substantially the same height and width.

The light emitting diode 5 is disposed on the light incident portion 30 and located below the recess 300. The reflection ring 4 is disposed on the light incident portion 30 and surrounds the light emitting diode 5 for reflecting the light emitted by the light emitting diode 5 to improve the stray light phenomenon at a large angle.

The light incident portion 30 includes a top wall 304, a surrounding wall 308, and a first connecting wall 311 and a second connecting wall 312 staggered between the top wall 304 and the surrounding wall 308. The top wall 304 is connected to one of the first connections. Wall 311, surrounding wall 308 abuts one of the second connecting walls 312.

The first connecting wall 311 is provided with a plurality of lenses 313, which are convex arcs or concave arcs, and are mainly used to change the transmission path of the light, thereby providing a light mixing effect and effectively increasing the visual aesthetics.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited, that is, the equivalent changes and modifications made by the scope of the novel application should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

1‧‧‧ optical lens

10‧‧‧Into the Department of Light

100‧‧‧ Groove

104‧‧‧ top wall

101‧‧‧ bottom

102‧‧‧Light Guide Area

108‧‧‧ Surrounding wall

110‧‧‧Microlens

12‧‧‧Lighting Department

Claims (15)

An optical component, which is suitable for forming a light-emitting module with a light-emitting component, the optical component comprising an optical lens, the optical lens has a light-injecting portion and a light-emitting portion connected to the light-incident portion, and an outer diameter of the light-emitting portion The outer diameter of the light-incident portion is larger than the light-emitting portion, and the light-incident portion is oppositely connected to the light-emitting portion, and a groove, a plurality of light-guiding regions are formed from the inside and the outside. A total reflection zone, the light guiding zones surround the groove concentrically. The optical component of claim 1, wherein the light guiding regions each have the same height. The optical component of claim 2, wherein the light incident portion further comprises a bottom surface away from the light exiting portion, and a distance between a bottom end of the light guiding regions and the bottom surface is away from a center of the optical lens The axis is incremented. The optical component of claim 2, wherein the light incident portion further comprises a bottom surface away from the light exiting portion, and a distance between a bottom end of the light guiding regions and the bottom surface is away from a center of the optical lens The axis is decreasing. The optical component of claim 1, wherein the light guiding regions have different heights. The optical component of claim 2, wherein the light incident portion further comprises a bottom surface away from the light incident portion, and a distance between a bottom end of the light guide regions and the bottom surface is a constant value. The optical component of claim 3, wherein the light guiding regions have the same width. The optical component of claim 3 or 4 or 6, wherein the light guide The zones have different widths. The optical component of claim 1, wherein the light incident portion further comprises a surrounding wall, a surface adjacent to the light guiding region of the total reflection region, wherein the surrounding wall is formed with a plurality of adjacent microlenses . The optical component of claim 9, wherein the microlenses are respectively convex or arcuate. The optical component of claim 9, wherein the light incident portion further comprises a top wall, and a plurality of first connecting walls and a plurality of second connections connected between the top wall and the surrounding wall and staggered a wall, wherein one of the first connecting walls is connected to the top wall, and one of the second connecting walls is connected to the surrounding wall. The optical component of claim 11, wherein the top wall is planar, convex or concave. The optical component of claim 11, wherein at least one of the first connecting walls is formed with a plurality of adjacent sub-lenses. The optical component of claim 13, wherein each of the secondary lenses has a convex arc shape or a concave arc shape. The optical component of claim 1, further comprising a reflective ring disposed corresponding to the recess and surrounding the light emitting component.