WO2012041006A1

WO2012041006A1 - Antiglare led lens and led lamp thereof

Info

Publication number: WO2012041006A1
Application number: PCT/CN2011/001606
Authority: WO
Inventors: 杨毅博
Original assignee: Yang Yibo
Priority date: 2010-09-28
Filing date: 2011-09-22
Publication date: 2012-04-05

Abstract

An LED lamp comprises an LED lens. The LED lens is used for preventing glare, and reducing the light intensity of a local area. The LED lens comprises an incidence surface (2) and an emergence surface (3). The incidence surface (2) and/or the emergence surface (3) are/is divided into four areas (a, b, c, d) by two intersecting planes, and several continuous micro curved surfaces (1) are provided in each area (a, b, c, d). The central axis formed by the intersecting planes coincides with the optical axis of the LED light source (4). The several micro curved surfaces (1) are arranged in sequence from the central axis to the edge of the lens. The LED lens can prevent the generation of glare by the diffusion effect of the micro curved surfaces (1). The mutual light distribution of the two symmetrical areas in the four areas (a, b, c, d) makes the light emitted from the whole lens become uniform.

Description

― Description Book

Anti-glare LED lens and LED lamp

Technical field

The invention relates to an anti-glare LED lens and an LED lamp.

Background technique

In the context of the global energy shortage worry, energy conservation is an important issue for us in the future. In the field of lighting, the application of LED lighting products is attracting the attention of the world. LED is a new type of green light source. It must be the trend of future development. The concentrated display of LED lighting in the 2008 Beijing Olympic Games gave people a new understanding of LED and effectively promoted the development of China's semiconductor lighting industry. At present, China's semiconductor industry is big but not strong, and its core competitiveness still needs to be further improved. The design of the living room lamps in the 21st century will be dominated by the design of LED lamps, and at the same time fully reflect the development trend of energy-saving, healthy, artistic and humanized lighting, and become the leading of the room lighting culture. Research data shows that because LED is a cold light source, semiconductor lighting itself does not have any pollution to the environment, compared with 3⁄4 incandescent lamps and fluorescent lamps, the power saving efficiency can reach more than 90%. At the same brightness, the amount of electricity is only 1/10 of that of an ordinary incandescent lamp and 1/2 of that of a fluorescent tube. If we replace 50% of our current traditional lighting with LEDs, the annual electricity saved in China is equivalent to the sum of the power generation of a Three Gorges Power Station, and its energy saving benefits are considerable. LED lamp DC drive, no stroboscopic; no infrared and ultraviolet components, no radiation pollution, high color rendering and strong directionality; good dimming performance, no visual error when color temperature changes; Low heat, safe to touch; these are not available with incandescent and fluorescent lamps. It can provide comfortable lighting 3⁄4, X can meet people's physiological health needs well, is a healthy light source to protect eyesight and protect the ear. LfiD lamps are small in size and light in weight, and can be combined with LEDs of different light colors to form various modules with soft illumination. Installed in the living room, the light source of the room lighting fixtures may be from the ground, walls, windowsills, furniture, accessories and so on. Unlike traditional illumination lamps, LEDs have the characteristics of point light source, high brightness, and narrow beam output. LED lamps should first be considered to fully utilize the limited luminous flux to the effective illumination range. Therefore, effective control of the distribution of light, so that the light emitted by the LED is distributed in the part that needs to be irradiated, and also takes into account the generation of glare, is a higher requirement put forward by the designers of the new LED lamps.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide an anti-glare LED lens and an LED lamp which prevent glare generation and reduce the intensity of light in a local area. The first technical solution adopted by the anti-glare LED lens of the present invention is that: the portion irradiated by the LED light source includes an incident surface and an exit surface, and the incident surface or/and the exit surface are divided into four by two intersecting planes. The central axis formed by the intersecting plane coincides with the optical axis of the LED light source, and each of the regions is provided with a plurality of curved surfaces, and the plurality of curved surfaces are sequentially arranged from the central axis toward the lens edge. Further, the plurality of curved surfaces are concave curved surfaces or convex curved surfaces, and the concave curved surface or the convex convex curved surface may be a regular curved surface or an irregular curved surface. Further, the two intersecting faces are perpendicular to each other to divide the incident face or the exit face into four regions.

Further, the lens is square or circular or other polygonal shape.

The invention further relates to a luminaire comprising the above-mentioned anti-glare LED lens, which specifically comprises a lamp body, a heat sink, a circuit board, a susceptor, at least one LED light source fixed on the pedestal, the number of the LED optical lenses In accordance with the LED light source, the lamp body, the heat sink, the circuit board and the base are sequentially connected, the LED optical lens housing the LED light source and positioning the LED light source on the central axis. The second technical solution adopted by the anti-glare LED lens of the present invention is as follows: the portion of the anti-glare LED lens that is illuminated by the LED light source includes an incident surface and an exit surface, and the incident surface or the exit surface includes a central diffusion curved surface. And a peripheral diffusion curved surface extending to the periphery, the peripheral diffusion curved surface being divided into at least four regions by at least two planes intersecting one axis, the intersecting axis coincides with an optical axis of the LED light source, and each region is composed of a plurality of The surface is composed of a plurality of curved surfaces arranged in order from the inner side to the outer side of the peripheral diffusion curved surface. In a preferred embodiment, the central diffusion curved surface is composed of a plurality of closely arranged concave or convex curved surfaces; or the central diffusion curved surface is an independently existing large concave curved surface or convex curved surface. In a preferred embodiment, the central diffusion curved surface is a multi-layered corrugated curved surface. Further, the lens is square or circular or other polygonal shape.

The invention also relates to a luminaire comprising the above-mentioned anti-glare LED lens, the lamp comprising a housing, a lamp cap and a circuit board inside the housing, an LED light source and a heat sink, wherein the anti-glare LED lens cover is disposed on the LED On the light source, the LED light source is located on the intersecting axis described above.

Further, the luminaire further includes a mirror mounted around the LED light source. The beneficial effects of the present invention are: Since in the first scheme, the lens portion illuminated by the LED light source is divided into four regions on the incident surface or/and the exit surface by two intersecting planes (in the second scheme, the lens is referred to as a lens) a portion of the entrance surface or the periphery of the exit surface, that is, a peripheral diffusion curved surface, the central axis formed by the intersecting plane coincides with the optical axis of the LED light source, and each of the regions is provided with a plurality of curved surfaces, and the plurality of curved surfaces are The central axis 佝 the edge of the lens is arranged in sequence, and the curved surface can diffuse the light emitted by the LED light source, reduce the local light intensity of the LED light source, and reduce the human string feeling. Moreover, the two intersecting planes are divided into four regions symmetric with each other. When the light passes through two mutually symmetric regions, the light will diffuse in a symmetric direction, so that the four regions will form two vertical diffused light distributions. The light in the four areas is easy to form a uniform light distribution effect, and the entire LED light fixture looks like a surface light source. DRAWINGS

1 is a schematic structural view of a lens according to an embodiment of the present invention;

Figure 2 is a cross-sectional view taken along line X of Figure 1;

Figure 3 is a schematic view showing the diffusion of light rays along the X-axis direction of the lens in the first embodiment;

4 is a structural view of an LED lamp in the first embodiment;

Figure 5 is a schematic view showing the lens in the LED lamp of the first embodiment in a square shape;

6 is a schematic view showing the lens in the LED lamp of the first embodiment in a circular shape;

7 is a schematic diagram of an LED lamp composed of four square lenses in the first embodiment; FIG. 8 is a schematic structural view of the LED lamp in the second embodiment of the present invention;

Figure 9 is a schematic view showing the peripheral diffusion surface of the lens in the second embodiment divided into four regions;

Figure 10 is a schematic view showing the non-uniform division of the peripheral diffusion surface of the lens in the second embodiment;

11 is a schematic view showing a central diffusion surface of the lens in an embodiment of the second embodiment; FIG. 12 is a schematic view showing a peripheral diffusion surface of the lens divided into a plurality of regions in the second embodiment;

Fig. 13 is a view showing a corrugated curved surface in which the center diffusion surface of the lens is a plurality of layers in the second embodiment.

detailed description

Embodiment 1:

As shown in FIG. 1, FIG. 2 and FIG. 3, the LED optical lens of the present invention comprises a plane 2 and an exit surface 3, and is divided into four regions by the two intersecting planes on the incident surface 2 or the exit surface 3 , b, c, d (in Figure 1 is divided into four regions on the incident surface 2, the angular bisector of the two symmetric regions are respectively X-axis, Y-axis), and each surface has a plurality of curved surfaces on the incident surface 1 The curved surface 1 is a concave curved surface or a convex curved surface, and may be a regular curved surface or an irregular curved surface. The plurality of curved surfaces 1 are arranged in order from the central axis of the two intersecting planes to the outer edge. In the above four regions, the angle bisectors of the two regions that are symmetrical with each other are divided into an X-axis and a Y-axis and are phased. Mutually perpendicular, in the X-axis direction of FIG. 3, light emitted by the LED illuminator located above the central axis passes through the area ό and the area d on the incident surface 2, and then exits from the exit surface 3, passing through the area c and the area d. The light rays are respectively diffused along the X-axis direction, and the two symmetrical regions are mutually distributed to form uniform and non-glare light, and the diffusion on the Y-axis is consistent with the X-axis. Therefore, the light emitted by the LED passes through the lens to form a large surface light source, and does not appear to be glare. Of course, there are cases in which four regions are divided on the incident surface 2 and the exit surface 3, and the concave curved surface 1 is provided.

In order to achieve a more desirable effect, a large concave spherical curved surface 11 is provided at the center intersection of the two intersecting lines, where the spherical curved surface 11 is not a completely regular spherical surface in some cases, but is composed of four parts. The curved surface composed of different curvatures is similar to the spherical surface; the light of the upper LED diffuses through the spherical curved surface 11 to further uniformize the light intensity, effectively reducing the brightness of the central portion. And the two intersecting lines can be arranged to be vertically divided into four regions, so that the illumination effect of the adjacent two regions is the same, and a more uniform light line can be obtained, which is the best solution.

The LED lamp shown in FIG. 4 includes a lamp body 7, a heat sink 8, a circuit board 9, a base 10, an LED light source 4 fixed on the base, the number of LED optical lenses 6 and LEDs. The light source 4 is adapted, the lamp body 7, the heat sink 8, the circuit board 9 and the base 10 are connected in sequence, the LED optical lens 6 covers the LED chip 5 and the LED chip 5 is placed at two intersecting planes Above the central axis, the LED optical lens 6 is either a force-shape (Fig. 5) or a circular shape (Fig. 6).

The LED lamp shown in FIG. 7 is different from the lamp shown in FIG. 4 in that it comprises four LED light sources 4 and four lenses 6, and the four lenses 6 can be connected together, and each of the LED light sources 4 externally mounting a lens 6, only one of the heat sink 8, the circuit board 9, the base 10, the heat sink 8 and the circuit board 9 and the base 10 are fixedly connected. The LED light source 4 is fixed to the susceptor 10. In this embodiment, the number and brightness of the LED light sources 4 can be adjusted according to the size of the indoor space, and the LED light sources 4 equipped with the plurality of lenses 6 can be combined into one light fixture. a plurality of lights on the susceptor 10 on which the LED light source 4 is mounted The source forms an infinite number of bright spots on the setting lens 6, and the entire lens 6 appears to be a huge light source, so that the way of dispersing light makes people not feel glare.

Embodiment 2:

As shown in FIG. 8 , the lamp according to the embodiment includes a housing 6 , a lamp base 7 , a circuit board 4 located inside the housing 7 , an LED light source 2 and a heat sink 5 . The anti-glare LED lens 1 is disposed in the housing. On the LED light source 2, the LED light source 2 is located on the central axis of the lens; and a mirror 2 for increasing the light utilization rate is further disposed around the LED light source 2.

As shown in FIG. 9, the anti-glare LED lens 1 includes an incident surface and an exit surface, and the incident surface or the exit surface includes a central diffusion curved surface 101 and a peripheral diffusion curved surface 102 extending to the periphery (FIG. 9 is FIG. 8 a bottom view of the incident surface of the lens shown), the peripheral diffusion curved surface 102 is divided into four regions a, b, c, d by two intersecting planes, and the incident surface of each region is provided with a plurality of curved surfaces, the curved surface 1 The concave curved surface or the convex curved surface may be a regular curved surface or an irregular curved surface; the plurality of curved surfaces are sequentially arranged from the inner side to the outer side edge. The four regions in Fig. 9 are divided into four regions, and the light emitted by the LED lamp located above the central axis passes through the region a and the region c on the incident surface, and then exits from the exit surface, and is incident from the region a and the region c. The light rays are respectively diffused toward the direction of the symmetrical region, that is, the two symmetrical regions &, c are mutually distributed to form uniform and non-glare rays, and the diffusion of the regions b and d is consistent with the above. Therefore, the light emitted by the LED passes through the lens to form a large surface light source, which does not appear to be glaring.

The central diffusing curved surface 101 located at the central position of the lens is composed of a plurality of closely arranged concave or convex curved surfaces; as another embodiment, the central diffusing curved surface 101 may also be a single large concave curved surface or convex. a curved surface (as shown in FIG. 11); as another embodiment, the central diffusion curved surface 101 may also be a multi-layered corrugated curved surface, and a curved surface form sequentially arranged from the inner side to the outer side in the above regions a, b, c, and d Similar (as shown in Figure 13).

Referring to FIG. 10, the anti-glare LED lens is square, and its incident surface also includes a central diffusion curved surface 101 and a peripheral diffusion curved surface 102 extending to the periphery. Unlike FIG. 9, the peripheral diffusion curved surface 102 is not equally divided into four. Areas, only two areas in the opposite position are required Symmetrical.

Referring to FIG. 12, the anti-glare LED lens incident surface also includes a central diffusion curved surface 101 and a peripheral diffusion curved surface 102 extending to the periphery, but as an extension, the peripheral diffusion curved surface 102 is divided by three planes intersecting one axis. For the six regions, the intersecting axis coincides with the optical axis of the LED light source, and each region is also arranged by a number of small curved surfaces from the inner side to the outer edge to form a corrugated curved shape, and each of the two symmetrical positions is mutually Light distribution; it can be understood that the peripheral diffusion curved surface 102 can also be expanded into more even-numbered regions.

Claims

An anti-glare LED lens, the portion illuminated by the LED light source includes an incident surface and an exit surface, wherein: the incident surface or/and the exit surface are divided into four regions by two intersecting planes, The central axis formed by the intersecting plane coincides with the optical axis of the LED light source, and each of the regions is provided with a plurality of curved surfaces, and the plurality of curved surfaces are sequentially arranged from the central axis toward the lens edge.

The anti-glare LED lens according to claim 1, wherein the plurality of curved surfaces are concave curved surfaces or convex curved surfaces. ,

The anti-glare LED lens according to claim 1, wherein the two intersecting planes are perpendicular to each other to divide the incident surface or the exit surface into four regions.

The anti-glare LED lens according to claim 1, wherein the lens is square or circular.

An LED lamp comprising the anti-glare LED lens of claim 1, comprising: a lamp body, a heat sink, a circuit board, a base, and at least one LED light source fixed on the base, The number of LED optical lenses is adapted to the LED light source, the lamp body, the heat sink, the circuit board and the base are sequentially connected, the LED optical lens covers the LED light source and the LED light source is located at the center On the axis.

An anti-glare LED lens, the portion illuminated by the LED light source includes an incident surface and an exit surface, wherein: the incident surface or the exit surface includes a central diffusion curved surface and a peripheral diffusion curved surface extending to the periphery, The peripheral diffusion curved surface is divided into at least four regions by at least two planes intersecting one axis, the intersecting axis coincides with the optical axis of the LED light source, and each region is composed of a plurality of curved surfaces, and the plurality of curved surfaces are The inner side of the peripheral diffusion curved surface is arranged in order from the outer side.

The anti-glare LED lens according to claim 6, wherein: the central diffusion curved surface is composed of a plurality of closely arranged concave or convex curved surfaces.

The anti-glare LED lens according to claim 6, wherein: said center The diffused surface is a multi-layered corrugated surface.

An LED lamp comprising the anti-glare LED lens of claim 6, comprising: a housing, a lamp cap, and a circuit board inside the housing, an LED light source and a heat sink, the anti-glare LED lens The cover is disposed on the LED light source, and the LED light source is located on the intersecting axis.

The LED lamp according to claim 9, wherein the LED lamp further comprises a mirror mounted around the LED light source.