Positive beam angle lens and luminaire and luminaire assembly having the same

Abstract

This invention relates to a lighting lens, specifically a positive beam angle lens and a lighting fixture and assembly incorporating the positive beam angle lens. It addresses the problems of excessive size, limited illumination range, and unevenness in existing reflective beam angle lenses. The lens comprises a hemispherical convex lens and a cylindrical mirror body located directly below the hemispherical convex lens. The diameters of the hemispherical convex lens and the cylindrical mirror body are equal. The hemispherical curved surface of the hemispherical convex lens serves as the light-emitting surface. The bottom center of the cylindrical mirror body is concave inward, forming a light source receiving chamber. The inner wall of the light source receiving chamber serves as the light-incident surface, and the center lines of the light-incident surface and the light-emitting surface are coaxial. This invention's positive beam angle lens features convex lenses for both the light-emitting and light-incident surfaces, effectively utilizing the refraction effect of light. This results in a smaller emission angle and a smaller lens structure, simplifying manufacturing, reducing cost, allowing for flexible adjustment of the reflection angle, facilitating installation / replacement, and broad applicability. It meets the needs of LED lighting fixtures with various emission angles, and is particularly suitable for high-power LED lighting fixtures with different emission angles.

Description

Technical Field

[0001] This invention relates to a lamp lens, specifically to a positive beam angle lens and a lamp having the positive beam angle lens. Background Technology

[0002] As traditional incandescent light bulbs gradually fade into history, fourth-generation solid-state light sources, represented by LEDs, are establishing a core leading position in the lighting field. LEDs (Light Emitting Diodes) have become a competitive new light source in the 21st century due to their high efficiency, pure light color, low energy consumption, long lifespan, and lack of pollution. With the continuous improvement of LED luminous flux and luminous efficacy, their application in lighting is becoming increasingly widespread. However, the surface light emission of LED chips follows a Lambertian distribution, making them unsuitable for direct application in lighting systems. Therefore, secondary light distribution design for LED light sources is particularly important.

[0003] Currently, high-power lighting fixtures typically use multiple LEDs arranged in a single array as their light source. Therefore, the corresponding light-distributing optics must also be designed as multi-module units. However, most multi-function light-distributing modules on the market currently use reflectors, typically employing beam-angle lenses. Such multi-function reflector modules generally suffer from excessive size. The smaller the beam angle of a beam-angle lens, the larger its structural dimensions and the more space it occupies. Because individual reflectors are relatively large, the overall size becomes even larger after integration, preventing a reduction in the overall design size of the lighting fixture and limiting its market application.

[0004] Furthermore, existing lenses project circular light spots, resulting in significant differences in light intensity between the center and the periphery. In situations requiring wide-area illumination in one direction and narrow-area illumination in another, such as road lighting, a wide illumination range and good lighting effect are needed along the road's direction, requiring a large angle. However, wide-area illumination is not necessary in the direction perpendicular to the road; otherwise, it would waste energy and cause light pollution to the surrounding environment. For existing circular LED lenses, the only solution is to install more lights along the road's direction, achieving the required light intensity through the superposition of light spots from adjacent lights. Even so, it's difficult to avoid a "ribbed road" lighting effect, where the illuminance is high directly below the lights and low in other areas, resulting in low and uneven average illuminance on the road surface. This uneven lighting directly affects driving safety. Summary of the Invention

[0005] To address the problems of excessive size, limited illumination range, and unevenness of existing reflective beam angle lenses, this invention provides a positive beam angle lens and a luminaire incorporating the positive beam angle lens.

[0006] The technical solution of the present invention is to provide a positive beam angle lens, which is characterized by: including a hemispherical convex lens and a cylindrical lens body located directly below the hemispherical convex lens and integrally formed thereon, the diameters of the hemispherical convex lens and the cylindrical lens body being equal; the hemispherical curved surface of the hemispherical convex lens serving as the light-emitting surface; the bottom center of the cylindrical lens body being recessed inward to form a light source receiving cavity, the inner wall of the light source receiving cavity serving as the light-incident surface, and the center lines of the light-incident surface and the light-emitting surface being coaxial.

[0007] Furthermore, the cavity inside the light source housing is shaped like a triangular prism; and one of the rectangular faces of the triangular prism is located at the bottom of the cylindrical mirror body, and the inner corners of the inner edges of the cavity are all rounded; the bottom of the cylindrical mirror body is defined as the XY plane, such that the light distribution surface along the XY plane is in the shape of a bat wing, and the light distribution surface along the YZ plane is in the shape of a teardrop.

[0008] Furthermore, the distance between the top center of the light source housing chamber and the center of the light-emitting surface is greater than the radius of the hemispherical convex lens; the Z-axis height of the light source housing chamber is equal to the radius of the hemispherical convex lens, and the X-axis dimension of the opening end of the light source housing chamber is greater than the radius of the hemispherical convex lens.

[0009] Furthermore, the positive beam angle lens has a Z-axis height of 18mm, the hemispherical convex lens has a radius of 8mm, the cylindrical lens body has a Z-axis height of 11.3mm, the light source receiving chamber opening has a Y-axis dimension of 8.3mm and an X-axis dimension of 9mm.

[0010] Furthermore, for ease of installation, the positive beam angle lens also includes an annular mounting member disposed at the bottom of the cylindrical lens body, with a protrusion on the end face of the annular mounting member.

[0011] The present invention also provides a lamp with a positive beam angle lens, which is characterized in that: it includes a mounting base, a plurality of LED beads and a plurality of the above-mentioned positive beam angle lenses; the plurality of LED beads are evenly arranged on the mounting base, and the positive beam angle lens is fastened to each LED bead and fixed on the mounting base.

[0012] Furthermore, the cavity inside the light source housing is cylindrical with rounded inner edges. The bottom of the cylindrical mirror is defined as the XY plane, so that the light distribution surface along the XY plane is teardrop-shaped, and the light distribution surface along the YZ plane is teardrop-shaped.

[0013] Furthermore, the distance between the top center of the light source housing chamber and the center of the light-emitting surface is equal to the radius of the hemispherical convex lens; the Z-axis height of the light source housing chamber is less than the radius of the hemispherical convex lens, and the X-axis and Y-axis dimensions of the opening end of the light source housing chamber are both greater than the radius of the hemispherical convex lens.

[0014] Furthermore, the Z-axis height is 15mm, the radius of the hemispherical convex lens is 8mm, the Z-axis height of the cylindrical lens body is 8.5mm, the Z-axis height of the light source housing chamber is 7mm, and the rounding radius is 2mm.

[0015] Furthermore, for ease of installation, the positive beam angle lens also includes an annular mounting member disposed at the bottom of the cylindrical lens body, with a protrusion on the end face of the annular mounting member.

[0016] The present invention also provides a lamp with a positive beam angle lens, which is characterized in that: it includes a mounting base, a plurality of LED beads and a plurality of the above-mentioned positive beam angle lenses; the plurality of LED beads are evenly arranged on the mounting base, and the positive beam angle lens is fastened to each LED bead and fixed on the mounting base.

[0017] The present invention also provides a lamp assembly with a positive beam angle lens, which is characterized in that it includes lamps with positive beam angle lenses of the above two types.

[0018] The beneficial effects of this invention are:

[0019] 1. The positive beam angle lens of this invention has convex lenses for both the light-emitting surface and the light-receiving surface, making reasonable use of the light refraction effect so that the smaller the light emission angle, the smaller the lens structure;

[0020] 2. The positive beam angle lens of this invention has a small structure, simple manufacturing, low cost, flexible adjustment of the reflection angle, convenient installation / replacement, and wide applicability. It meets the needs of LED lamps with various light emission angles, and is especially suitable for high-power LED lamps with different light emission angles.

[0021] 3. The positive beam angle lens of the present invention has a uniform light intensity distribution, and the distribution range is different in the horizontal and vertical directions. In practical applications, it has a high light efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the positive beam angle lens according to Embodiment 1 of the present invention;

[0023] Figure 2 This is a cross-sectional view of the positive beam angle lens along the yz plane according to Embodiment 1 of the present invention;

[0024] Figure 3 This is a front view of the positive beam angle lens according to Embodiment 1 of the present invention;

[0025] Figure 4 This is a bottom view of the positive beam angle lens according to Embodiment 1 of the present invention;

[0026] Figure 5 The light intensity distribution curve of the positive beam angle lens in Embodiment 1 of the present invention is shown.

[0027] Figure 6 This is a schematic diagram of the structure of the positive beam angle lens according to Embodiment 2 of the present invention;

[0028] Figure 7 This is a front view of the positive beam angle lens according to Embodiment 2 of the present invention;

[0029] Figure 8 This is a cross-sectional view of the positive beam angle lens along the yz plane in Embodiment 2 of the present invention;

[0030] Figure 9 This is the light intensity distribution curve of the positive beam angle lens in Embodiment 2 of the present invention;

[0031] The attached figures are labeled as follows: 1-hemispherical convex lens, 2-cylindrical lens body, 3-light source housing chamber, 4-ring mounting piece, 5-protrusion. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1 As shown, the positive beam angle lens in this embodiment is made of PC and includes a hemispherical convex lens 1 and a cylindrical lens body 2 integrally formed below the hemispherical convex lens. The diameters of the hemispherical convex lens and the cylindrical lens body are equal. The hemispherical curved surface of the hemispherical convex lens serves as the light-emitting surface of the lens. The bottom center of the cylindrical lens body is recessed inward to form a light source receiving chamber 3. The inner wall of the light source receiving chamber 3 serves as the light-incident surface, and the center lines of the light-incident surface and the light-emitting surface are coaxial.

[0035] Define the plane containing the bottom of cylindrical mirror body 2 as the XY plane, and combine it with... Figure 2 , Figure 3 and Figure 4 In this embodiment, the cavity inside the light source housing 3 is shaped like a triangular prism; and one of the rectangular faces of the triangular prism is located at the bottom of the cylindrical mirror body 2, and the inner corners of the cavity are all rounded.

[0036] To fix the positive beam angle lens to the outside of the LED beads, this embodiment also includes an annular mounting member 4 disposed at the bottom of the cylindrical lens body. A protrusion 5 is provided on the end face of the annular mounting member 4, and the mounting is achieved through the protrusion 5. Specifically, after the LED beads are evenly distributed on the fixing plate, the positive beam angle lens of this embodiment is then attached to the LED beads to form an LED lamp. Figure 5In this embodiment, the light-distributing surface of the positive beam angle lens in the XY plane (horizontal direction) is shaped like a bat wing, and the light-distributing surface in the YZ plane (vertical direction) is shaped like a teardrop. If applied to streetlights, it can solve the problem of uneven road surfaces and ensure driving safety. It can also be applied to ships. When it is determined that there is a foreign object in front of the vehicle, the positive beam angle lens can be used to check the surrounding environment of the foreign object.

[0037] from Figure 5 As can be seen, the light intensity distribution curve of the positive beam angle lens in this embodiment has an illumination range of 10° in the YZ direction and an illumination range of 50° in the XY plane direction.

[0038] The specific structural parameters of the positive beam angle lens in this embodiment are as follows:

[0039] The Z-axis height of the positive beam angle lens is 18mm;

[0040] The radius of the hemispherical convex lens is 8mm, the Z-axis height of the cylindrical lens body is 11.3mm, the Y-axis dimension of the opening end of the light source receiving chamber is 8.3mm, the X-axis dimension is 9mm, the apex angle of the triangular prism is 40°, the Z-axis thickness of the annular mounting part 4 is 1mm, and the Z-axis thickness of the protrusion is 0.6mm.

[0041] Example 2

[0042] like Figure 6 As shown, the positive beam angle lens in this embodiment is made of PC and also includes a hemispherical convex lens 1 and a cylindrical lens body 2 integrally formed below the hemispherical convex lens. The diameters of the hemispherical convex lens and the cylindrical lens body are equal. The hemispherical curved surface of the hemispherical convex lens serves as the light-emitting surface of the lens. The bottom center of the cylindrical lens body is recessed inward to form a light source receiving chamber 3. The inner wall of the light source receiving chamber 3 serves as the light-incident surface, and the light-incident surface and the light-emitting surface are coaxial.

[0043] Combination Figure 7 and Figure 8 Unlike Embodiment 1, the cavity inside the light source housing in this embodiment is cylindrical in shape and has rounded inner edges.

[0044] To fix the positive beam angle lens to the outside of the LED beads, this embodiment also includes an annular mounting member 4 disposed at the bottom of the cylindrical lens body. A protrusion 5 is provided on the end face of the annular mounting member 4, and the mounting is achieved through the protrusion 5. Specifically, after the LED beads are evenly distributed on the fixing plate, the positive beam angle lens of this embodiment is then attached to the LED beads to form an LED lamp.

[0045] like Figure 9In this embodiment, the light-distributing surface of the positive beam angle lens in the XY plane (horizontal direction) is teardrop-shaped, and the light-distributing surface in the YZ plane (vertical direction) is teardrop-shaped. It can be combined with the positive beam angle lens in Embodiment 1 and applied to marine lighting fixtures. The positive beam angle lens in this embodiment can be used to determine whether there are foreign objects in front of the vehicle. When there are foreign objects, the positive beam angle lens in Embodiment 1 can be used to check the surrounding environment of the foreign objects.

[0046] from Figure 9 It can be seen that the light intensity distribution curve of the positive beam angle lens in this embodiment has an illumination range of 10° in the YZ direction and an illumination range of 10° in the XY plane direction.

[0047] The specific structural parameters of the positive beam angle lens in this embodiment are as follows:

[0048] The Z-axis height of the positive beam angle lens is 15mm, the radius of the hemispherical convex lens is 8mm, the Z-axis height of the cylindrical lens body is 8.5mm, the Z-axis height of the light source housing chamber is 7mm, and the rounding radius is 2mm.

Claims

1. A positive beam angle lens characterized by: It includes a hemispherical convex lens (1) and a cylindrical mirror body (2) integrally formed below the hemispherical convex lens (1). The diameters of the hemispherical convex lens (1) and the cylindrical mirror body (2) are equal. The hemispherical curved surface of the hemispherical convex lens (1) serves as the light-emitting surface. The bottom center of the cylindrical mirror body (2) is recessed inward to form a light source receiving chamber (3). The inner wall of the light source receiving chamber (3) serves as the light-incident surface. The center lines of the light-incident surface and the light-emitting surface are coaxial. The cavity inside the light source housing (3) is shaped like a triangular prism; and one of the rectangular faces of the triangular prism is located at the bottom of the cylindrical mirror body (2), and the inner corners of the inner edges of the cavity are all rounded; the plane where the bottom of the cylindrical mirror body is located is defined as the XY plane, the XY plane is provided with mutually perpendicular XY axes, the direction along the X axis is the X direction, the direction along the Y axis is the Y direction, the vertical direction of the cylindrical mirror body (2) is the Z axis, and the direction along the Z axis is the Z direction; the light distribution surface of the positive beam angle lens in the XY plane is in the shape of a bat wing, and the light distribution surface in the YZ plane is in the shape of a teardrop; It also includes an annular mounting piece (4) set at the bottom of the cylindrical mirror body (2), and a protrusion (5) is provided on the end face of the annular mounting piece (4); The Z-direction thickness of the annular mounting part (4) is 1 mm, and the Z-direction thickness of the protrusion (5) is 0.6 mm.

2. The positive beam angle lens of claim 1, wherein: The distance between the top center of the light source receiving chamber (3) and the center of the light-emitting surface is greater than the radius of the hemispherical convex lens (1); the Z-direction height of the light source receiving chamber (3) is equal to the radius of the hemispherical convex lens (1); and the X-direction dimension of the opening end of the light source receiving chamber (3) is greater than the radius of the hemispherical convex lens (1).

3. A luminaire with a positive beam angle lens, characterized in that: It includes a mounting base, multiple LED beads, and multiple positive beam angle lenses as described in any one of claims 1-2; the multiple LED beads are evenly arranged on the mounting base, and the positive beam angle lens is fastened to each LED bead and fixed on the mounting base.

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