TW201923303A - Light distribution module - Google Patents

Abstract

A light distribution module for controlling a light distribution of a light source is provided. The light distribution module includes a lens and an optical cover. The lens has a first light incident surface and a first light emitting surface opposite to the first light incident surface, and a containing recess located at one side of the first light incident surface, wherein the containing recess is configured to contain the light source. The optical cover covers the lens, and has a second light incident surface and a second light emitting surface opposite to the second light incident surface, wherein the second light incident surface is located between the first light emitting surface and the second light emitting surface, and the second light incident surface has a plurality of sub-curved surfaces. Boundaries between adjacent sub-curved surfaces are bent-shaped with respect to the adjacent sub-curved surfaces.

Description

Light distribution module

The present invention relates to an optical module, and more particularly to a light distribution module.

In the design of conventional lighting devices, the light source is placed on an optical housing to produce the desired light shape. In order to meet the lighting regulations of different countries and the different lighting requirements in different regions, the same lighting device often needs to design several kinds or even dozens of optical covers to meet the lighting requirements of road lighting. Regulations and lighting requirements in the area.

However, lighting devices for road lighting often require long-term development and are costly. Moreover, the demand for each type of lighting device also means an additional maintenance cost. Therefore, for manufacturers of lighting devices for producing road lighting, there is a need for a lighting device that can reduce the number of lighting devices that can be developed in accordance with national regulations and various needs.

The invention provides a light distribution module, which can reduce the development quantity of the light distribution module.

An embodiment of the present invention provides a light distribution module for controlling light distribution of a light source, including a lens and an optical cover. The lens has a first light incident surface, a first light emitting surface opposite to the first light incident surface, and a receiving recess on a side of the first light incident surface, wherein the receiving recess is for receiving the light source. The optical cover covers the lens and has a second light incident surface and a second light exit surface, wherein the second light incident surface is located between the first light emitting surface and the second light emitting surface, and the second light incident surface has a plurality of sub-lights Surface. The intersection of these adjacent sub-surfaces exhibits a transitional appearance with respect to these sub-surfaces. One of the lens and the optical housing produces a first shape that is rotationally symmetric or non-rotationally symmetric, and the other of the lens and the optical housing produces a second shape that is rotationally symmetric.

Based on the above, the light distribution module in the embodiment of the present invention includes a lens and an optical cover. The lens and the optical cover generate a first light shape that is rotationally symmetric or non-rotationally symmetric, and the other of the lens and the optical cover generates rotational symmetry. The second light shape. Therefore, the light distribution module of the present invention can produce a desired light shape through a combination of a lens and an optical cover, thereby greatly reducing the number of designs of the optical cover.

The above described features and advantages of the invention will be apparent from the following description.

1A is a side elevational view of a lighting device in accordance with a first embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the illumination device of FIG. 1A taken along the optical axis A. FIG. 2A-2C are schematic views of three sub-surfaces of an optical housing in accordance with an embodiment of the present invention. 3A-3B are perspective views of lenses in accordance with an embodiment of the present invention. 3C and 3D are schematic cross-sectional views of the lens of FIG. 3B along the second major axis B2 and the first major axis B1, respectively. 4A-4B are schematic perspective views of a lens according to another embodiment of the present invention. 4C and 4D are schematic cross-sectional views of the lens of FIG. 4B along the longitudinal direction B3 and the lateral width direction B4, respectively. 5A-5B are perspective views of a lens according to still another embodiment of the present invention. 5C and 5D are schematic cross-sectional views of the lens of FIG. 5B along the longitudinal direction B3 and the transverse direction B4, respectively. 6A-6B are schematic perspective views of a lens according to still another embodiment of the present invention. Figure 6C is a cross-sectional view of the lens of Figure 6B. 7A-7B are perspective views of an optical housing in accordance with an embodiment of the present invention. 7C is a cross-sectional view of the optical housing of FIG. 7B. Figure 7D is a top plan view of the optical housing of Figure 7A. 8A-8B are perspective views of an optical housing according to another embodiment of the present invention. 8C and 8D are schematic cross-sectional views of the optical housing of FIG. 8B along the lateral width direction C4 and the longitudinal direction C3, respectively. Figure 8E is a top plan view of the optical housing of Figure 8A. 9A-9B are perspective views of an optical housing according to still another embodiment of the present invention. 9C and 9D are schematic cross-sectional views of the optical cover of FIG. 9B along the lateral width direction C4 and the longitudinal direction C3, respectively. Figure 9E is a top plan view of the optical housing of Figure 9A.

For convenience of explanation, the weft of the optical cover in some of the drawings is only illustrated, and is not all shown. For example, the weft of the optical cover of Fig. 7B is only indicated by three wefts.

Referring to FIG. 1A and FIG. 1B , the illumination device 10 of the embodiment includes a light source 110 and a light distribution module 100 . The light distribution module 100 is used to control the light distribution of the light source 110. The light distribution module 100 includes a lens 120 and an optical cover 130. The lens 120 has a first light-incident surface 121, a first light-emitting surface 122 opposite to the first light-incident surface 121, and a receiving recess 123 on a side of the first light-incident surface 121. 123 is used to accommodate the light source 110. In the present embodiment, the lens 120 of FIG. 1B is the lens 120D of FIG. 6A. However, the present invention is not limited thereto, and the lens 120 may be replaced by the lens 120A of FIG. 3A, the lens 120B of FIG. 4A, the lens 120C of FIG. 5A, or a lens of another shape as needed.

The optical cover 130 covers the lens 120 and has a second light-incident surface 131 and a second light-emitting surface 132. The second light-incident surface 131 is located between the first light-emitting surface 122 and the second light-emitting surface 132. The diffractive surface 131 has a plurality of sub-curves 133. The junctions 133f, 133g of the adjacent sub-curves 133 exhibit a transitional appearance with respect to the sub-curves 133. The lens 120 and one of the optical housings 130 generate a first light shape that is rotationally symmetric or non-rotationally symmetric, and the lens 120 and the other of the optical housings 130 generate a second light shape that is rotationally symmetric. In the present embodiment, the optical housing 130 of FIG. 1B is the optical housing 130A of FIG. 7A. However, the present invention is not limited thereto, and the optical cover 130 may be replaced by the optical cover 130B of FIG. 8A, the optical cover 130C of FIG. 9A, or the deformation of other optical covers as needed.

In this embodiment, the light source 110 is, for example, a light emitting diode (LED). However, the present invention is not limited thereto, and the light source 110 may also be a laser diode, an incandescent lamp, a mercury lamp, a halogen lamp, a fluorescent lamp or other suitable light source.

In this embodiment, the lens 120 may be a suitable material such as polycarbonate (Polycarbonate, PC), polymethylmethacrylate (PMMA), silicone or optical glass, preferably pressure. Cree, which has high light extraction efficiency and can be produced by injection molding. The optical cover 130 may be a suitable material such as polycarbonate, acryl, silicone or glass, preferably polycarbonate, which has better weather resistance and can be produced by injection molding. In addition, for the large-sized light distribution module 100, the optical cover 130 may also be made of optical glass.

Moreover, in the embodiment, the optical cover 130 may further be provided with a diffusing agent for enhancing the ability of the optical cover 130 to homogenize the light. The second light-emitting surface 132 of the optical cover 130 may be coated with a scratch-resistant hard coating layer to increase the structural strength of the optical cover 130.

Specific features of the optical housing 130 of the illumination device 10 in the embodiment of the present invention will be described next.

Referring to FIG. 1B again, in the embodiment, the thickness H1 of the optical cover 130 of the illumination device 10 near the center of the sub-curved surface (for example, the sub-curved surface 133a) of the edge of the optical cover 130 to the second light-emitting surface 132 is greater than that of the optical device. The center of the outer cover 130 has a sub-curved surface (for example, the sub-curved surface 133b) to a thickness H2 of the second light-emitting surface 132. The distance between each sub-curved surface 133 and the second light-emitting surface 132 decreases from an end near the edge of the optical cover 130 toward an end near the center of the optical cover 130.

In addition, the second light incident surface 131 of the optical housing 130 has a ridge shape at the boundary 133f of the sub-curved surface 133 adjacent to the optical axis A of the optical housing 130 (for example, FIG. 1B, FIG. 2A to FIG. 2C and FIG. 7D, wherein FIG. 7D clearly shows that the junction 133f has a convex ridge shape), and the second light incident surface 131 of the optical housing 130 is adjacent in the direction from the edge of the optical housing 130 to the center of the optical housing 130. The intersection 133g of the curved surface has a step difference (for example, FIG. 1B, FIG. 2A to FIG. 2C, and FIG. 7C, wherein FIG. 1B and FIG. 7C clearly show that the boundary 133g has a step difference).

It is to be noted that the second light incident surface 131 of the optical housing 130 of the embodiment of the present invention includes a plurality of sub-curves 133, as compared with a Fresnel lens, which is a continuous smooth curved surface in the direction of the optical axis. The boundary 133f of the sub-curved surfaces 133 adjacent in the direction around the optical axis A of the optical housing 130 has a ridge shape. Therefore, the structure of the second light incident surface 131 of the optical housing 130 of the embodiment of the present invention is different from the structure of the Fresnel lens.

Furthermore, in the embodiment, the sub-curved surface 133 of the optical cover 130 has the function of homogenizing the light distribution, but the invention is not limited thereto, and the sub-curved surface 133 may also be designed to concentrate light or generate as needed. Other light shapes. A specific embodiment in which the sub-curved surface 133 homogenizes the light distribution will be described in detail below.

Referring to FIG. 2A to FIG. 2C, first, a broken line in FIGS. 2A and 2B indicates a line connecting the ridges of the intersection 133f of the adjacent sub-curves 133 of the respective curved surfaces of the sub-curves 133c and the sub-curves 133d, The other dotted line indicates an extension line of a point at which the respective curved surfaces of the sub-curved surface 133c and the sub-curved surface 133d are the shortest distance from the second light-emitting surface 132, wherein the distance between the two broken lines of the sub-curved surface 133c is 0.5 mm, and the sub-curved surface 133d The distance between the two broken lines is 1.0 mm. In addition, the angle between the lowest point of the curved surface of the sub-curved surface 133e of FIG. 2C and the highest point of the curved surface is 60 degrees.

Table I

Table 1 shows the divergence effect of the sub-curved surface 133c, the sub-curved surface 133d, and the sub-curved surface 133e. Specifically, a light source 110 is outputted toward the optical housing 140 in the direction of 45 degrees of the central axis B thereof. The output angle of the light of the light source 110 ranges from 5 degrees. Therefore, the sub-curved surface 133c diverges the range of 5 degrees to 32 degrees, and the divergent effect is low; the sub-curved surface 133d diverges the range of 5 degrees to 98 degrees, and the divergent effect is medium; and the sub-curved surface 133e diverges the range of 5 degrees. At 110 degrees, its divergence effect is high. Therefore, the sub-curved surface 133 of the optical cover 130 can be designed as one of the sub-curved surface 133c, the sub-curved surface 133d and the sub-curved surface 133e according to environmental requirements to generate a desired light shape or divergence effect, and the present invention does not For example, the sub-curved surface 133 of the optical cover 130 may also be a combination of the sub-curved surface 133c, the sub-curved surface 133d, and the sub-curved surface 133e to generate other specific light shapes.

Therefore, the optical cover 130 of the embodiment of the present invention can generate a desired light distribution according to the structure of the sub-curved surface 133, and is not limited to focusing light or A light distribution that diverges light.

The lens 120 and the optical housing 130 generate a first shape that is rotationally symmetric or non-rotationally symmetric, and the lens 120 and the other of the optical housing 130 generate a second shape that is rotationally symmetric. Specifically, a first light shape that is rotationally symmetric or non-rotationally symmetric is generated for the lens 120, and the optical housing 130 produces a rotationally symmetric second light shape embodiment; or, the optical housing 130 produces rotationally symmetric or non-rotationally symmetric The first light shape, and the lens 120 produces a rotationally symmetric second light shape embodiment.

Hereinafter, the first light shape in which the lens 120 generates rotational symmetry or non-rotational symmetry is described. For example, in FIGS. 3A to 6C, the lens 120A to the lens 120D respectively have a first light shape in which the lens 120A can generate non-rotational symmetry, and the lens 120B can be A first rotational shape that produces rotational symmetry, a lens 120C that produces a rotationally symmetrical first light shape, and an embodiment in which the lens 120D can produce an axisymmetric first light shape, and the optical housing 130 produces a rotationally symmetric second light shape, such as A rotationally symmetrical second light shape is produced for the optical housing 130A of Figures 7A-7C.

In the present specification, "rotational symmetry" means that after a pattern is rotated by an angle of less than 360 degrees around the axis of symmetry, the pattern coincides with the pattern before the rotation, and the figure is a rotationally symmetrical figure. For example, the square is a 90 degree rotationally symmetric pattern (because the square will coincide with the rotation before every 90 degrees of rotation of the square), the rectangle is a 180 degree rotationally symmetric pattern, and the triangle is 120 degrees of rotational symmetry. In addition, "axisymmetric" means that after every angle of rotation of a figure about the axis of symmetry, the figure will coincide with the front of the rotation, that is, the axis symmetry is the rotational symmetry of any angle, and the axisymmetric circle is, for example, a circle.

First, referring to FIG. 3A to FIG. 3D, the lens 120A in this embodiment has a first long axis B1 in a direction perpendicular to the central axis B of the light emitted by the light source 110, and the receiving groove 123 is perpendicular to The direction of the central axis B of the light emitted by the light source 110 has a second major axis B2, the direction of the first major axis B1 is different from the direction of the second major axis B2, and the lens 120A produces a first shape that is not rotationally symmetric. In this embodiment, the first major axis B1 is perpendicular to the second major axis B2, the first light-emitting surface 122 is not mirror-symmetrical in a direction perpendicular to the first major axis B1, and the receiving groove 123 is in the second The direction of the long axis B2 is not mirror symmetrical. In addition, in the embodiment, the first light-emitting surface 122 is mirror-symmetrical in a direction perpendicular to the second long axis B2, and the receiving groove 123 is mirror-symmetrical in the direction of the first major axis B1.

Referring to FIG. 4A to FIG. 4D again, the lens 120B in this embodiment has a longitudinal direction B3 and a lateral width direction B4. In FIG. 4A and FIG. 4B, the protrusions on the first light-emitting surface 122 are shown by solid lines, and the depressions are shown by broken lines. That is, the first light exit surface 122 has a cross-shaped protrusion 124, and the orthographic projection 124 of the cross-shaped protrusion 124 on a reference plane perpendicular to the optical axis C of the lens 120B (eg, in the xz plane of FIG. 3A) The direction of extension is inclined with respect to the longitudinal direction B3 and the lateral direction B4. In FIG. 4A, the protrusions on the first light incident surface 121 are shown by solid lines, and the depressions are shown by broken lines. That is, the first light incident surface 121 has a cross recess 125, and the extending direction of the orthogonal projection 124' on the reference plane (for example, in the xz plane of FIG. 4A) is opposite to the longitudinal direction B3 and The width direction B4 is inclined. In the present embodiment, the longitudinal direction B3 and the lateral width direction B4 of the lens 120B are perpendicular to each other, so that the lens 120B generates a first light shape that is rotationally symmetric (for example, 180 degrees rotationally symmetric); and in other embodiments, the lens The longitudinal direction B3 and the lateral direction B4 of 120B are not perpendicular to each other, so that the lens 120B can generate a first light shape that is not rotationally symmetric.

Referring to FIGS. 5A to 5D again, the lens 120C in this embodiment has a longitudinal direction B3 and a lateral width direction B4. In FIGS. 5A and 5B, the protrusions on the first light-emitting surface 122 are shown by solid lines, and the depressions are shown by broken lines. That is, the first light exit surface 122 has a cross-shaped protrusion 126 that is orthographically projected 126 on a reference plane perpendicular to the optical axis C of the lens 120C (eg, in the xz plane of FIG. 5A). The direction of extension is the same as the longitudinal direction B3 and the lateral direction B4. In FIG. 5A, the protrusions on the first light incident surface 121 are shown by solid lines, and the depressions are shown by broken lines. That is, the first light incident surface 121 has a cross-shaped recess 127, and the extending direction of the orthographic projection 126' of the cross-shaped recess 127 on the reference plane (for example, in the xz plane of FIG. 5A) is the same as the longitudinal direction B3 and Horizontal width B4. In the present embodiment, the longitudinal direction B3 and the lateral width direction B4 of the lens 120C are perpendicular to each other, and thus the lens 120C generates a first light shape that is rotationally symmetric (for example, 180 degrees rotationally symmetric); and in other embodiments, the lens The longitudinal direction B3 and the lateral direction B4 of the 120C are not perpendicular to each other, so that the lens 120C can generate a first light shape that is not rotationally symmetric.

Referring to FIG. 6A to FIG. 6C , the first light-incident surface 121 of the lens 120D and the first light-emitting surface 122 are axially symmetric, and the side surface 128 of the first light-incident surface 121 is closer to the first The steeper the apex 129 of the light exit surface 122.

In addition, referring to FIG. 7A to FIG. 7C , in the embodiment, the second light-emitting surface 131 of the optical cover 130A is axially symmetric, wherein the sub-curved surfaces 133 are arranged in a plurality of layers around the optical axis A of the optical cover 130A. And the optical housing 130A produces a rotationally symmetrical second light shape.

The lens 120A to the lens 120D based on the above-described FIGS. 3A to 6C may generate a rotationally symmetrical or non-rotationally symmetrical first light shape, and the optical housing 130A of FIGS. 7A to 7C generates a rotationally symmetrical second light shape. Therefore, the light distribution module 100 of the present embodiment can select one of the above four lenses 120A-120D to be combined with the optical cover 130A according to requirements, that is, the illumination device 10 of the embodiment can combine four different lights. Shaped lighting device 10. It is worth mentioning that the lens 120D can produce an axisymmetric light shape, and the optical housing 130A can also produce a rotationally symmetrical light shape, so in the combination of the lens 120D and the optical housing 130A, the lens 120D can produce an axisymmetric first The light shape (or second light shape) and the optical housing 130A can produce a rotationally symmetrical second light shape (or first light shape).

Hereinafter, the second light shape in which the lens 120 is rotationally symmetric is illustrated. For example, the lens 120D of FIGS. 6A to 6C can generate an axisymmetric second light shape, and the optical housing 130 generates a first light shape that is rotationally symmetric or non-rotationally symmetric. Embodiments, such as optical enclosures 130B and 130C of Figures 8A-9E, can produce a mirror-symmetrical first light shape.

First, referring to FIG. 6A to FIG. 6C, the lens 120D of the present embodiment can generate an axisymmetric second light shape. The same features can be referred to the above description, and thus will not be described again.

Furthermore, referring again to FIGS. 8A to 9E, the optical housings 130B and 130C in this embodiment have a longitudinal direction C3 and a lateral width direction C4. The optical housings 130B and 130C are mirror-symmetrical in the longitudinal direction C3, and are non-mirror-symmetric in the lateral direction C4, and the optical housings 130B and 130C generate non-rotationally symmetrical first light shapes, wherein the sub-curves 133 are longitudinal The longitudinal direction C3 is mirror-symmetrical and is non-mirror-symmetrical in a multi-layered annular arrangement in the lateral direction C4. The plurality of layers of annular arrays adjacent to the center of the optical enclosures 130B and 130C (e.g., adjacent to the sub-curved surfaces 133b) are annular in a heart shape. Further, in the present embodiment, the optical housing 130B of FIG. 8A is different in height from the optical housing 130C of FIG. 9A. That is, the thickness of the illumination device collocated with the optical housing 130B of FIG. 8A may be greater than the thickness of the illumination device that is mated with the optical housing 130C of FIG. 9A.

The lens 120D based on the above-described FIGS. 6A to 6C can generate an axisymmetric second light shape, and the optical housings 130B and 130C of FIGS. 8A to 9E can generate a mirror-symmetrical first light shape. Therefore, the light distribution module 100 of the present embodiment can select one of the two types of optical housings 130B and 130C to be combined with the lens 120D according to requirements, that is, the light distribution module 100 of the embodiment can be combined into two types. Different light-shaped light distribution modules 100.

It is worth mentioning that, according to the above embodiment, there are four embodiments in which the lens is in the first light shape and the optical cover is in the second light shape, and the lens is in the second light shape and the optical cover is in the first light shape. There are two types, so that a total of six different light distribution modules 100 can be combined. However, the invention is not limited thereto, and the width to height ratio of the optical cover can also be designed according to the actual needs of the light shape or the light distribution.

The characteristics of the light distribution that can be produced by the lens 120 and the optical cover 130 in accordance with the above-described embodiments of the present invention will be described below, followed by an embodiment in which the optical cover is at different width to height ratios.

Figure 10 is a diagram showing the light distribution of a light source in an embodiment of the present invention. 11A and FIG. 11B are diagrams showing the distribution of light patterns in the direction of the first major axis B1 and the direction of the second major axis B2 after the light source of FIG. 10 passes through the lens of FIG. 3A. 11C and FIG. 11D are respectively a light distribution pattern produced by the light shape of FIGS. 11A and 11B after passing through the optical cover of FIG. 7A. FIG. 12A is a light distribution diagram of the light source of FIG. 10 after passing through the lens of FIG. 6A. FIG. Figure 12B is a light pattern diagram of the light shape of Figure 12A after passing through the optical housing of Figure 7A.

Referring to FIG. 10 to FIG. 11D, the light source of FIG. 10 is a light-emitting diode. As shown in FIG. 10, the light source of the selected light source is concentrated, so that the ability of the lens 120 and the optical cover 130 to generate a light shape can be detected. Next, since the lens 120A has mirror symmetry in the direction of the first major axis B1 (for example, FIG. 3D), the light shape of FIG. 11A also has mirror symmetry; otherwise, since the lens 120A does not have the second major axis B2 direction Symmetry (e.g., Figure 3C), and thus the light shape of Figure 11B does not have symmetry. It is worth mentioning that, in Fig. 11C and Fig. 11D, the distribution of the light shapes of Fig. 14C and Fig. 11D is relatively average compared with 11A and Fig. 11B, and it can be seen that the sub-curved surface 133 of the optical cover 130A has the effect of uniformizing the light distribution.

Referring to FIG. 10, FIG. 12A and FIG. 12B, since both the lens 120D and the optical cover 130A used in FIGS. 12A and 12B have rotational symmetry, a light symmetry having a rotational symmetry can be produced. Similar to the distribution of the light shapes of FIGS. 11C and 11D described above, the distribution of the light shapes of FIG. 12B is relatively average compared to FIG. 12A, so that it is also known that the sub-curves 133 of the optical cover 130A have uniform light distribution. The function.

Next, a light distribution (light energy distribution, that is, an iso-illuminance line diagram) which can be produced in accordance with the combination of the lens and the optical cover in the above embodiment will be briefly described. Hereinafter, the first light shape in which the lens generates rotational symmetry or non-rotational symmetry is described, and the optical cover produces a light distribution of the rotationally symmetrical second light-shaped embodiment, and the optical cover is firstly rotated to generate rotationally symmetric or non-rotationally symmetric first light. And the lens produces a light distribution of a second symmetrical embodiment of the rotational symmetry.

Figure 13A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 3A. Figure 13B is an isometric diagram of the light distribution produced by the light distribution of Figure 13A after passing through the optical enclosure of Figure 7A. Figure 14A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A. Figure 14B is an isometric diagram of the light distribution produced by the light distribution of Figure 14A after passing through the optical enclosure of Figure 7A. Figure 15A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 4A and then through the optical housing of Figure 7A. 15B is an isometric diagram of the light distribution produced by the light source of FIG. 10 after passing through the lens of FIG. 5A and then passing through the optical housing of FIG. 7A.

First, it is explained that the lens produces a rotationally symmetrical or non-rotationally symmetrical first light shape, and the optical housing produces a light distribution of a rotationally symmetric second light shaped embodiment. In the diagram of the iso-illuminance line, the units of the horizontal axis and the vertical axis are in units of the height set by the light distribution module of the present invention, for example, at a height of 10 feet, and the number indicated by the iso-illuminance line is Illuminance, the unit is fc (Lm / ft ² , that is, the flow per square foot). In addition, the dotted line is the line of half the maximum intensity.

Referring to FIG. 13A and FIG. 13B, the light distributions of FIGS. 13A and 13B have an asymmetrical characteristic, and the light distribution is also distributed on the vertical axis. Therefore, if used as a road illumination device, it can be set as The lower side of the vertical axis of Figs. 13A and 13B is biased toward the side of the sidewalk (or the side of the house), and the upper side of the vertical axis of Figs. 13A and 13B is biased toward the side of the lane, that is, both the lane and the sidewalk. Illumination, and the light distribution on the side of the lane is small, while the light distribution on the side of the sidewalk is large.

14A and 14B, since the lens 120D of FIG. 6A and the optical cover 130A of FIG. 7A are both rotationally symmetric, the light distributions of FIGS. 14A and 14B also have rotational symmetry.

Furthermore, please refer to FIG. 15A and FIG. 15B at the same time. If FIG. 15A is compared with FIG. 15B, the light distribution of FIG. 15B is relatively uniform, so it is suitable for general wide-range illumination; and the light distribution of FIG. 15A is relatively narrow and concentrated. Therefore, it is suitable for lighting of narrow roads/ways. For example, projecting light perpendicular to the direction of the road reduces the amount of light energy that is projected onto the houses on both sides of the road.

Next, it is explained that the optical housing produces a rotationally symmetrical or non-rotationally symmetrical first light shape, and the lens produces a light distribution of a rotationally symmetric second light shaped embodiment.

Figure 16A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A and then through the optical housing of Figure 8A. Figure 16B is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A and then through the optical housing of Figure 9A.

Referring to FIG. 16A and FIG. 16B simultaneously, if FIG. 16A is compared with FIG. 16B, the light distribution of FIG. 16A is narrower on the horizontal axis, and has a pole-ratio of 4 times in the range of 0.1 fc, and FIG. 16B is horizontal. The distribution on the shaft is wide, with a 5 times pole height ratio in the 0.1 fc range. Therefore, FIG. 16B can have a wider pitch in the arrangement of the spacing between the lamp post and the lamp post.

Next, embodiments of different width to height ratios of the optical housing according to the above-described embodiments of the present invention will be described.

Figure 17 is a cross-sectional view showing a lighting device in accordance with a second embodiment of the present invention. Figure 18 is a cross-sectional view showing a lighting device in accordance with a third embodiment of the present invention. Figure 19 is a cross-sectional view showing a lighting device in accordance with a fourth embodiment of the present invention.

Referring to FIG. 1B , in the embodiment, the illumination device 10 further includes a reflective base 140 , wherein the light source 110 , the lens 120 and the optical cover 130 are disposed on the reflective base 140 , and the reflective base 140 has a light source 110 The central axis B of the light is sandwiched by a reflecting surface 142 of the first angle α. The light emitted by the light source 110 has a second angle β between the maximum intensity direction E and the central axis B after passing through the lens 120. For example, the light shape of FIG. 11A has a maximum intensity in a direction of ±60 degrees, the light shape of FIG. 11B has a maximum intensity in a direction of -30 degrees, and the light shape of FIG. 12A has a maximum intensity in a direction of ±45 degrees. . Preferably, the second angle β is less than or equal to the first angle α, so that the illumination device 10 can illuminate the maximum intensity direction E of the light shape on the road according to the actual road condition, but the invention does not Limited.

Further, in the illumination device 10 of the present embodiment, the reflection base 140 has a flange 141 whose thickness in the direction parallel to the central axis B of the light emitted from the light source 110 is H, and the optical cover 130 is close. The distance from the bottom of the light source 110 to the flange 141 in the direction away from the top of the light source 110 in the direction of the parallel central axis B (i.e., the flange height) is T. In an embodiment of the present invention (for example, the lighting device 10 of FIG. 18), H≦T, the optical cover 130 can be completely concealed within the flange 141 of the reflective base 140, thereby reducing the chance of being damaged by foreign matter impact. In other embodiments of the invention (eg, illumination device 10 of FIG. 1B and illumination device 10 of FIG. 17), H>T, optical enclosure 130 may be self-cleaning via, for example, rain or dew flow. Ability.

Furthermore, the outer diameter of the optical cover 130 in the direction perpendicular to the central axis B is D. It is worth mentioning that although the present invention does not limit the size and ratio of the thickness H and the outer diameter D of the optical cover 140, in order to optimally implement the present invention, the D/H of the present embodiment is optimal when H>T. It falls within the range of 0.5 to 25. For example, the D/H of the illumination device 10 of FIG. 1B may be 4.24, wherein the outer diameter D is 212 mm and the thickness H is 50 mm; the D/H of the illumination device 10 of FIG. 17 may be 2.4, wherein the outer diameter D The thickness H is 88 mm for 212 mm; and the D/H of the illumination device 10 of Fig. 18 can be 21.2, wherein the outer diameter D is 212 mm and the thickness H is 10 mm.

Furthermore, the second light-emitting surface 132 of the optical cover 130 of the illumination device 10 in the above embodiment may be an integrated design, that is, the second light-emitting surface 132 of the optical cover 130 is a smooth curved surface, and the interior of the illumination device 10 can be Sealed to achieve dust and water resistance, it has better environmental pollution resistance, which means lower maintenance costs. In addition, the optical cover 130 may have a refractive power when the thickness is greater than about 1.5 mm. Therefore, a thicker thickness is required to obtain sufficient refracting power compared to the conventional illumination device. The optical cover 130 in the above embodiment is more The thin thickness can still have sufficient refractive power, so the lighting device 10 in the above embodiment can also reduce the manufacturing cost.

In addition, in the present embodiment, the height of the flange may be according to design requirements, and the invention is not limited thereto, and the invention may include a flangeless one, that is, T may be zero. Moreover, in the above embodiment, the first angle α of the reflective surface 142 of the reflective base 140 of FIGS. 1B, 17 and 18 is less than 90 degrees, but the invention is not limited thereto, for example, as shown in FIG. The first angle α of the reflective surface 142 of the reflective base 140 of the optical module 1100 may also be greater than or equal to 90 degrees.

Light distribution of the illumination device 10 of the embodiment of the present invention based on the description of the lens 120, the optical housing 130, and the reflective base 140 of the illumination device (for example, the illumination device 10 of FIGS. 1B, 17 and 18) of the above-described embodiments of the present invention Can be divided into four types. Specifically, referring to FIG. 1B, FIG. 17, and FIG. 18, the first type of light distribution is (for example, the illumination device 10 of FIG. 18): the intensity distribution of the light emitted by the light source 110 after passing through the optical cover 130 at the far field. In the above, the light energy in the direction of the optical axis A of the optical housing 130 is greater than or equal to 90 degrees, and the ratio of the total energy of the light after passing through the optical housing 130 is 0%, and the light is in the light after passing through the optical housing 130. The ratio of the light energy in the direction of 80 degrees to 90 degrees of the axis A to the total energy is less than 10%.

In another embodiment, the second type of light distribution is that the light emitted by the light source 110 is on the far-field light intensity distribution after passing through the optical housing 130, and is greater than or equal to 90 degrees with the optical axis A of the optical housing 130. The ratio of the light energy in the direction to the total energy after passing through the optical housing 130 is less than 2.5%, and the light energy in the direction of 80 to 90 degrees from the optical axis A after passing through the optical housing 130 accounts for the total energy. The ratio is less than 10%.

In still another embodiment, the third type of light distribution is that the light emitted by the light source 110 is on the far-field light intensity distribution after passing through the optical housing 130, and is greater than or equal to 90 degrees with the optical axis A of the optical housing 130. The ratio of the light energy in the direction to the total energy after passing through the optical housing 130 is less than 5%, and the light energy in the direction of 80 to 90 degrees from the optical axis A after passing through the optical housing 130 accounts for the total energy. The proportion is less than 20%.

Furthermore, the fourth type of light distribution is (for example, the illumination device 10 of FIG. 1B and the illumination device 10 of FIG. 17): the light emitted by the light source 110 passes through the optical housing 130 on the far-field light intensity distribution, in the optical The ratio of the light energy in the direction in which the optical axis A of the outer cover 130 is greater than or equal to 90 degrees to the total energy after passing through the optical housing 130 is not limited, and the light is clipped to the optical axis A after passing through the optical housing 130. The ratio of light energy to total energy in the direction of 90 degrees is also not limited.

Based on the above, the light distribution module and the illumination device of the embodiment of the present invention include a lens and an optical cover, and the lens and the optical cover generate a first shape that is rotationally symmetric or non-rotationally symmetric, and another rotation of the lens and the optical cover generates rotation. Symmetrical second light shape. Therefore, the light distribution module and the illumination device can generate a desired light shape through the combination of the lens and the optical cover, can conform to the installation regulations of the illumination device, and are suitable for various road conditions. In addition, the combination of the light distribution module and the illumination device of the embodiment of the present invention through the lens and the optical cover can greatly reduce the design number of the optical cover compared to the conventional illumination device.

20 is a perspective view showing an assembled structure of a lighting device according to an embodiment of the invention. Referring to FIG. 20, in the embodiment, the reflective base 240 of the illumination device 10 of FIG. 20 may be the reflective base 140 of FIG. 1B. Additionally, the optical enclosure 230 of the illumination device 10 of FIG. 20 can be the optical enclosure 130 of FIG. 1B. That is, the optical housing 230 of the illumination device 10 of FIG. 20 can be the optical housing 130A of FIG. 7A, the optical housing 130B of FIG. 8A, the optical housing 130C of FIG. 9A, or an optical housing used according to other requirements. This is limited to this.

In addition, in the embodiment, the illumination device 10 can be assembled on the reflective base 240 by means of a screw lock, a mechanical snap, an elastic platen, a hand-turn card slot or a combination thereof, but the present invention does not In the above manner, the optical cover 230 can also be assembled on the reflective base 240 by other suitable means, such as magnetic attraction, pasting, and the like.

In summary, the light distribution module and the illumination device of the embodiment of the present invention include a lens and an optical cover, and the lens and the optical cover generate a first shape of rotational symmetry or non-rotational symmetry, and the lens and the optical cover are another A second light shape that produces rotational symmetry. Therefore, the light distribution module and the illumination device can generate a desired light shape through the combination of the lens and the optical cover, can conform to the installation regulations of the illumination device, and are suitable for various road conditions. In addition, the combination of the light distribution module and the illumination device of the embodiment of the present invention through the lens and the optical cover can greatly reduce the design number of the optical cover compared to the conventional illumination device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Lighting device

100, 1700, 1800, 1900‧‧‧ light distribution module

110‧‧‧Light source

120, 120A, 120B, 120C‧‧‧ lens

121‧‧‧First entrance

122‧‧‧The first glazing

123‧‧‧ accommodating grooves

124‧‧‧cross-shaped bulges

124’, 126’‧‧‧ orthographic projection

125‧‧‧cross-shaped depression

126‧‧‧Cross-shaped bulge

127‧‧‧Cross-shaped depression

128‧‧‧ side

129‧‧‧ vertex

130, 130A, 130B, 130C, 230‧‧‧ optical cover

131‧‧‧Second entrance

132‧‧‧Second glazing

133, 133a, 133b, 133c, 133d, 133e‧‧‧ subsurfaces

133f, 133g‧‧ ‧ junction

140, 240‧‧‧reflecting base

141‧‧‧Flange

142‧‧‧reflecting surface

250‧‧‧ buckle

A, C‧‧‧ optical axis

B‧‧‧Center axis

B1‧‧‧ first long axis

B2‧‧‧ second long axis

B3, C3‧‧‧ longitudinal direction

B4, C4‧‧‧ horizontal direction

D‧‧‧OD

E‧‧‧Maximum intensity direction

H, H1, H2‧‧‧ thickness

T‧‧‧ distance

Α‧‧‧first angle

Β‧‧‧second angle

1A is a side elevational view of a lighting device in accordance with a first embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the illumination device of FIG. 1A taken along the optical axis A. FIG. 2A-2C are schematic views of three sub-surfaces of an optical housing in accordance with an embodiment of the present invention. 3A-3B are perspective views of lenses in accordance with an embodiment of the present invention. 3C and 3D are schematic cross-sectional views of the lens of FIG. 3B along the second major axis B2 and the first major axis B1, respectively. 4A-4B are schematic perspective views of a lens according to another embodiment of the present invention. 4C and 4D are schematic cross-sectional views of the lens of FIG. 4B along the longitudinal direction B3 and the lateral width direction B4, respectively. 5A-5B are perspective views of a lens according to still another embodiment of the present invention. 5C and 5D are schematic cross-sectional views of the lens of FIG. 5B along the longitudinal direction B3 and the transverse direction B4, respectively. 6A-6B are schematic perspective views of a lens according to still another embodiment of the present invention. Figure 6C is a cross-sectional view of the lens of Figure 6B. 7A-7B are perspective views of an optical housing in accordance with an embodiment of the present invention. 7C is a cross-sectional view of the optical housing of FIG. 7B. Figure 7D is a top plan view of the optical housing of Figure 7A. 8A-8B are perspective views of an optical housing according to another embodiment of the present invention. 8C and 8D are schematic cross-sectional views of the optical housing of FIG. 8B along the lateral width direction C4 and the longitudinal direction C3, respectively. Figure 8E is a top plan view of the optical housing of Figure 8A. 9A-9B are perspective views of an optical housing according to still another embodiment of the present invention. 9C and 9D are schematic cross-sectional views of the optical cover of FIG. 9B along the lateral width direction C4 and the longitudinal direction C3, respectively. Figure 9E is a top plan view of the optical housing of Figure 9A. Figure 10 is a diagram showing the light distribution of a light source in an embodiment of the present invention. 11A and FIG. 11B are diagrams showing the distribution of light patterns in the direction of the first major axis B1 and the direction of the second major axis B2 after the light source of FIG. 10 passes through the lens of FIG. 3A. 11C and FIG. 11D are respectively a light distribution pattern produced by the light shape of FIGS. 11A and 11B after passing through the optical cover of FIG. 7A. FIG. 12A is a light distribution diagram of the light source of FIG. 10 after passing through the lens of FIG. 6A. FIG. Figure 12B is a light pattern diagram of the light shape of Figure 12A after passing through the optical housing of Figure 7A. Figure 13A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 3A. Figure 13B is an isometric diagram of the light distribution produced by the light distribution of Figure 13A after passing through the optical enclosure of Figure 7A. Figure 14A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A. Figure 14B is an isometric diagram of the light distribution produced by the light distribution of Figure 14A after passing through the optical enclosure of Figure 7A. Figure 15A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 4A and then through the optical housing of Figure 7A. 15B is an isometric diagram of the light distribution produced by the light source of FIG. 10 after passing through the lens of FIG. 5A and then passing through the optical housing of FIG. 7A. Figure 16A is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A and then through the optical housing of Figure 8A. Figure 16B is an isometric diagram of the light distribution produced by the light source of Figure 10 after passing through the lens of Figure 6A and then through the optical housing of Figure 9A. Figure 17 is a cross-sectional view showing a lighting device in accordance with a second embodiment of the present invention. Figure 18 is a cross-sectional view showing a lighting device in accordance with a third embodiment of the present invention. Figure 19 is a cross-sectional view showing a lighting device in accordance with a fourth embodiment of the present invention. 20 is a perspective view showing an assembled structure of a lighting device according to an embodiment of the invention.

Claims (20)

A light distribution module for controlling light distribution of a light source, the light distribution module comprising: a lens having a first light incident surface, a first light emitting surface relative to the first light incident surface, and a a receiving groove on one side of the first light incident surface, wherein the receiving groove is for receiving the light source; and an optical cover covering the lens and having a second light incident surface and a first a second light-emitting surface, wherein the second light-incident surface is located between the first light-emitting surface and the second light-emitting surface, and the second light-incident surface has a plurality of sub-curves, and the boundary of the adjacent sub-surfaces is opposite to The sub-surfaces exhibit a transitional appearance, wherein the lens and the optical enclosure produce a first shape that is rotationally symmetric or non-rotationally symmetric, and the lens and the optical enclosure produce a second rotation symmetry Light shape. The light distribution module of claim 1, wherein the second light exiting surface is axisymmetric. The light distribution module of claim 1, wherein the sub-curves are arranged in a plurality of layers around the optical axis of the optical cover, and the optical cover generates the second light shape. The light distribution module of claim 1, wherein the lens has a first major axis in a direction perpendicular to a central axis of the light emitted by the light source, the receiving groove being perpendicular to the light source The direction of the central axis of the emitted light has a second major axis, the direction of the first major axis being different from the direction of the second major axis, and the lens produces the first optical shape that is non-rotationally symmetric. The light distribution module of claim 4, wherein the first major axis is perpendicular to the second major axis. The light distribution module of claim 4, wherein the first light-emitting surface is not mirror-symmetrical in a direction perpendicular to the first long axis, and the receiving groove is on the second long axis The direction is not mirror symmetrical. The light distribution module of claim 1, wherein the lens has a longitudinal direction and a lateral width direction, and the first light-emitting mask has a cross-shaped protrusion, the cross-shaped protrusion being perpendicular to the An extending direction of the orthographic projection on a reference plane of the optical axis of the lens is inclined with respect to the longitudinal direction and the lateral direction, the first light-receiving mask having a cross-shaped recess, the cross-shaped recess being on the reference plane The extending direction of the orthographic projection is inclined with respect to the longitudinal direction and the lateral direction, and the lens produces the first light shape that is rotationally symmetric. The light distribution module of claim 1, wherein the lens has a longitudinal direction and a lateral direction, the first light-emitting mask has a cross-shaped protrusion, and the cross-shaped protrusion is perpendicular to the An orthographic projection on a reference plane of the optical axis of the lens extends in the same direction as the longitudinal direction and the lateral direction, the first light-receiving mask having a cross-shaped recess, the cross-shaped recess being positive on the reference plane The extension direction of the projection is the same as the longitudinal direction and the lateral direction, and the lens produces the first light shape that is rotationally symmetric. The light distribution module of claim 1, wherein the first light incident surface of the lens is axially symmetric with the first light exit surface. The light distribution module of claim 9, wherein a side surface of the first light incident surface is steeper as it approaches an apex of the first light exiting surface. The light distribution module of claim 1, wherein the optical cover has a longitudinal direction and a lateral direction, and the optical cover is mirror-symmetrical in the longitudinal direction, and is in the lateral direction Non-mirror symmetrical, and the optical enclosure produces the first shape that is non-rotationally symmetric. The light distribution module of claim 11, wherein the sub-curved surfaces are mirror-symmetrical in the longitudinal direction and are non-mirror-symmetrical multilayer annular arrangements in the lateral direction. The light distribution module of claim 12, wherein the plurality of annular arrays of the plurality of layers adjacent to the center of the optical enclosure have a heart-shaped annular shape. The light distribution module of claim 1, further comprising a reflective base, wherein the light source, the lens and the optical cover are disposed on the reflective base. The light distribution module of claim 14, wherein the reflective base has a reflective surface that is at a first angle with a central axis of the light emitted by the light source, and the light emitted by the light source passes through the A maximum intensity direction behind the lens has a second angle with the central axis, and the second angle is less than or equal to the first angle. The light distribution module of claim 14, wherein the reflective base has a flange, and the optical cover has a thickness H in a direction parallel to a central axis of light emitted by the light source, the optical cover The distance from the bottom of the light source to the flange at a distance from the top of the light source in a direction parallel to the central axis is T, and H ≦ T. The light distribution module of claim 14, wherein the reflective base has a flange, and the optical cover has a thickness H in a direction parallel to a central axis of light emitted by the light source, the optical cover The distance from the bottom of the light source to the flange at a distance from the top of the light source in a direction parallel to the central axis is T, and H > T. The light distribution module of claim 1, wherein the optical cover has a thickness H in a direction parallel to a central axis of light emitted by the light source, and the optical cover is perpendicular to the central axis. The upper outer diameter is D, and D/H falls within the range of 0.5 to 25. The light distribution module of claim 1, wherein a boundary of adjacent sub-curved surfaces in a direction surrounding an optical axis of the optical housing has a convex ridge shape. The light distribution module of claim 1, wherein the intersection of the sub-curved surfaces adjacent in the direction from the edge of the optical housing to the center of the optical housing has a step.