CN105333318A - Wide Angle LED Lighting Unit - Google Patents

Abstract

The utility model provides a wide-angle LED lighting device, including the lamp shade, lens, LED light source board and the LED light source of setting on LED light source board, this lens sets up the top at this LED light source board, this lamp shade is bottom open-ended shell structure, this lamp shade bottom cover is established around this lens and LED light source board, the bottom of this lens is just being equipped with the incident plane to this LED light source, the middle part of this lens is equipped with refraction portion, this lens is equipped with first light distribution portion in the both sides of this refraction portion or around, this lens is equipped with second light distribution portion in the periphery of this first light distribution portion, this first light distribution portion and second light distribution portion are used for refracting the lateral wall or the bottom of this lamp shade with the light that shoots out from this LED light source. The LED lamp shade is provided with the first light distribution part and the second light distribution part which are used for refracting light rays emitted by the LED light source towards the side wall or the bottom of the lamp shade. Most of light rays emitted by the LED light source are irradiated out towards the side wall and the bottom of the lampshade, and the LED light source has the advantages of large-angle illumination and high optical efficiency.

Description

Wide Angle LED Lighting Unit

technical field

The invention relates to an LED lighting fixture, in particular to a large-angle LED lighting device.

Background technique

LED light sources have the advantages of high luminous efficiency, low heat generation, power saving and long life, so their applications are becoming more and more extensive. LED lamps will gradually replace traditional lighting fixtures such as incandescent lamps and halogen lamps. Some LED secondary optical lenses with adjustable beam angles on the market are plano-convex lenses or double-convex lenses, which do not have a total reflection design. Although this type of lens can produce a relatively uniform crescent-shaped spot, its optical efficiency is relatively low. Low. In addition, there are also some adjustable focus LED secondary optical lenses on the market that are total reflection lenses, which are composed of a light-gathering part in the middle and a total reflection part of the outer ring, but because the light-gathering part in the middle of the lens is two smooth upper and lower On the surface, when the light is concentrated, the square shadow of the chip will be transmitted, which is very unsightly. In existing lenses, it is common to have different focal lengths between the light-collecting part and the total reflection part of the outer ring, resulting in misalignment of the two parts of the light spots during focusing, and uneven dark or bright rings in the center of the light spots. Especially for linear lamps, there are very few cases where the horizontal light distribution angle of the entire lamp exceeds 180 degrees, and the linear effect of the light spot is poor, resulting in relatively limited applications.

Contents of the invention

In view of this, it is necessary to provide a large-angle LED lighting device with good light spot uniformity.

A large-angle LED lighting device, comprising a lampshade, a lens, an LED light source board and an LED light source arranged on the LED light source board, the lens is arranged above the LED light source board, the lampshade is a shell structure with an open bottom, and the lampshade The bottom cover is arranged around the lens and the LED light source board, the bottom of the lens is provided with an incident surface for the LED light source, the middle part of the lens is provided with a refraction part, and the lens is provided with a second A light distribution part, the lens is provided with a second light distribution part on the periphery of the first light distribution part, and the light emitted by the LED light source close to the central axis direction passes through the refraction part and then refracts toward the top of the lampshade. The light emitted by the light source deviates from the central axis direction and is emitted toward the first light distribution part, and the light emitted by the LED light source away from the central axis direction is emitted toward the second light distribution part. The first light distribution part and the second light distribution part use The light from the LED light source is refracted towards the side wall or the bottom of the lampshade.

Compared with the prior art, the large-angle LED lighting device is provided with a refraction part in the middle of the lens, and the refraction part can refract a part of the light toward the top of the lampshade to meet the light requirements of the top. At the same time, the first light distribution part and the second light distribution part are used to refract the light emitted from the LED light source toward the side wall or the bottom of the lampshade. Most of the light emitted by the LED light source is irradiated towards the side wall and the bottom of the lampshade. On the one hand, it achieves a large-angle lighting effect, and also enables most of the light to shine outward, with high optical efficiency. On the other hand, the aspect ratio of the light spot formed by the irradiated light is about 1, which can be applied to the lighting requirements of occasions with low installation height and large site area, such as rooms, classrooms and other occasions.

Description of drawings

Fig. 1 is a front view of a large-angle LED lighting device according to the first embodiment of the present invention.

Fig. 2 is a light path diagram of the large-angle LED lighting device shown in Fig. 1 .

Fig. 3 is a schematic perspective view of a lens in a linear structure in the large-angle LED lighting device shown in Fig. 1 .

FIG. 4 is a schematic perspective view of a structure in which the lens in the large-angle LED lighting device shown in FIG. 1 is a rotating body.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 to FIG. 4 for the large-angle LED lighting device according to the first embodiment of the present invention.

Please refer to FIG. 1 to FIG. 4 , a large-angle LED lighting device includes a lampshade 40 , a lens 20 , an LED light source board 10 and an LED light source 11 disposed on the LED light source board 10 . The lens 20 is disposed directly above the LED light source board 10 , the lampshade 40 is a shell structure with an open bottom, and the bottom of the lampshade 40 is disposed around the lens 20 and the LED light source board 10 . The lampshade 40 and the lens 20 are in a strip shape, and the LED light source board 10 is in a strip shape corresponding to the lens 20 . Certainly, in other embodiments, the lens 20 and the LED light source board 10 may also have other structures, for example, the lens 20 may be a rotating body structure, and meanwhile, the LED light source board 10 may be a circular plate structure. The bottom of the lens 20 is provided with an incident surface 21 facing the LED light source 11 , and the middle of the lens 20 is provided with a refracting portion 22 . The lens 20 is respectively provided with a first light distribution part on both sides of the refraction part 22 , and the lens 20 is provided with a second light distribution part on the periphery of the first light distribution part. It should be noted that the periphery referred to here refers to the outer side of the bottom of the first light distribution part on the lens 20 . The light 30 emitted by the LED light source 11 in the direction close to the central axis passes through the refraction portion 22 and then refracted toward the top of the lampshade 40 , and the light 30 emitted by the LED light source 11 deviates from the central axis and is emitted toward the first light distribution portion. The light 30 emitted by the LED light source 11 away from the central axis direction is emitted toward the second light distribution part, and the first light distribution part and the second light distribution part are used to direct the light 30 emitted from the LED light source 11 toward the lampshade 40 sidewall or bottom refraction. The lens 20 is integrally made of transparent or translucent material.

It should be understood that the central axis of the LED light source 11 refers to the axis vertically passing through the geometric center of the LED light source 11 and the LED light source board 10 . The light 30 emitted by the above-mentioned LED light source 11 close to the central axis refers to a range parallel to the central axis or at an angle less than 10 degrees. The range of the angle between the light emitted by the LED light source 11 that deviates from the central axis and the central axis is 3 degrees to 45 degrees, and the angle between the light emitted by the LED light source 11 that is away from the central axis and the central axis. 15 degrees to 90 degrees. The light emitted by the LED light source 11 in a direction away from the central axis is adjacent to the light emitted by the LED light source 11 in a direction away from the central axis.

By setting the refraction portion 22 in the middle of the lens 20 , the refraction portion 22 can refract a part of the light 30 toward the top of the lampshade 40 to meet the requirements of the light 30 at the top. At the same time, the first light distribution part and the second light distribution part are used to refract the light 30 emitted from the LED light source 11 toward the side wall or bottom of the lampshade 40 . Most of the light 30 emitted by the LED light source 11 is irradiated toward the side wall and the bottom of the lampshade 40 . On the one hand, a large-angle lighting effect is achieved, and most of the light 30 can be irradiated outward, so that the optical efficiency is high. On the other hand, the aspect ratio of the light spot formed by the irradiated light 30 is about 1, which can be applied to the lighting requirements of occasions with low installation height and large site area, such as rooms, classrooms and other occasions. The lens 20 is integrally made of a transparent or translucent material, such as plastic or glass, so that the lens 20 with a complex structure can be manufactured conveniently.

Please refer to FIG. 1 to FIG. 3 , the first light distribution part includes two first refraction sides 24 respectively arranged on both sides of the refraction part 22 , and the first refraction side 24 faces away from the LED light source relative to the refraction part 22 11 directions protruding setting. The second light distribution part includes two second refraction edges 23 respectively arranged on two sides of the first light distribution part. The second refraction side 23 is disposed adjacent to the first refraction side 24 , and the second refraction side 23 protrudes relative to the refraction portion 22 in a direction away from the LED light source 11 .

The first refraction side 24 includes a first reflection surface 241 and a first refraction surface 242, the first reflection surface 241 intersects with the first refraction surface 242 to form an acute angle, and the first refraction surface 242 faces the bottom or side of the lampshade 40 The first reflective surface 241 is used to reflect the light 30 from the LED light source 11 toward the first refraction surface 242, so that the light 30 passes through the first refraction surface 242 and emits toward the side wall or bottom of the lampshade 40 .

The first refraction edge 24 is arranged on both sides of the refraction portion 22 and protrudes upward. The first reflective surface 241 and the first refractive surface 242 can be correspondingly provided on the first refraction edge 24 . And the first refraction surface 242 is disposed toward the bottom or sidewall of the lampshade 40 . Therefore, the light 30 can be irradiated toward the side wall or bottom of the lampshade 40 after being refracted by the first refracting surface 242 after being emitted by the first reflecting surface 241 , so as to realize a large-angle lighting effect.

Please refer to FIG. 1 to FIG. 3 , the first reflective surface 241 is a convex arc structure facing away from the side wall or bottom of the lampshade 40 , and the first refracting surface 242 is convex toward the side wall or bottom close to the lampshade 40 curved structure. Therefore, the light 30 is reflected downward to the first refraction surface 242 through the first reflection surface 241 , and then the light 30 is irradiated toward the side wall or the bottom of the lampshade 40 through the first refraction surface 242 .

Please refer to FIG. 1 and FIG. 2, the second refraction edge 23 includes a second reflective surface 231 and a second refractive surface 232, the second reflective surface 231 intersects with the second refractive surface 232 to form an acute angle, the second reflective surface 231 It is used to reflect the light 30 toward the second refraction surface 232 , so that the light 30 passes through the second refraction surface 232 and exits toward the side wall or bottom of the lampshade 40 . The formation principle of the light 30 of the second refraction side 23 is the same as the formation principle of the light 30 of the first refraction side 24 , and the second refraction side 23 is arranged on the periphery of the first refraction side 24 . Therefore, the light 30 can be reflected by the second reflective surface 231 , and then refracted by the second refraction surface 232 to make the light 30 emit toward the side wall or the bottom of the lampshade 40 .

Please refer to FIG. 1 and FIG. 2, the incident surface 21 is a recessed groove structure facing away from the LED light source 11, the LED light source 11 is disposed in the incident surface 21, the incident surface 21 includes a first incident portion and is arranged on the Two second incidence portions on both sides of the first incidence portion, the first incidence portion is the bottom surface of the refraction portion 22, and the second incidence portions are respectively arranged corresponding to the first refraction side 24 and the second refraction side 23, The second incident portion protrudes toward the LED light source 11 to form an arc surface, and the second incident portion is used for converging the light 30 toward the first refraction side 24 and the second refraction side 23 . Most of the light 30 emitted by the LED light source 11 can be converged and directed to the first refraction side 24 and the second refraction side 23 , and finally irradiated outward, which greatly improves the optical efficiency.

Please refer to Fig. 4, the lens 20a of the second embodiment of the present invention can also be a structure of a rotating body, the first light distribution part includes first annular refraction edges 24a respectively arranged on the periphery of the refraction part 22a, and the second light distribution part It includes a second annular refraction edge 23a disposed on the periphery of the first light distribution part, the first annular refraction edge 24a and the second annular refraction edge 23 protrude toward a direction away from the LED light source 11 . The lens 20a is arranged as a rotating body structure, so as to be used in different lamp mounting bodies. The cross-sectional shapes of the first annular refraction side 24 a and the second annular refraction side 23 a can be the same as those in the above-mentioned first embodiment, because their positions relative to the LED light source 11 are consistent.

To sum up, the large-angle LED lighting device sets the refraction part 22 in the middle of the lens 20, and the refraction part 22 can refract a part of the light 30 toward the top of the lampshade 40 to meet the requirements of the light 30 at the top. At the same time, the first light distribution part and the second light distribution part are used to refract the light 30 emitted from the LED light source 11 toward the side wall or bottom of the lampshade 40 . Most of the light 30 emitted by the LED light source 11 is irradiated toward the side wall and the bottom of the lampshade 40 . On the one hand, a large-angle lighting effect is achieved, and most of the light 30 can be irradiated outward, so that the optical efficiency is high. On the other hand, the aspect ratio of the light spot formed by the irradiated light 30 is about 1, which can be applied to the lighting requirements of occasions with low installation height and large site area, such as rooms, classrooms and other occasions. The first refraction edge 24 is arranged on both sides of the refraction portion 22 and protrudes upward. Therefore, the light 30 can be emitted from the first reflective surface 241 , then refracted by the first refracting surface 242 and irradiated toward the side wall or bottom of the lampshade 40 , so as to realize large-angle illumination. The incident surface 21 is set to have a converging structure, so that most of the light 30 emitted by the LED light source 11 can pass through the incident surface 21 after converging, and finally irradiate outward, which greatly improves the optical efficiency. The lens 20 is integrally made of transparent or translucent material, so the lens 20 with complex structure can be manufactured conveniently.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (11)

1. a large-angle LED illuminating device, comprise lampshade, lens, LED light source plate and the LED light source be arranged on LED light source plate, these lens are arranged on the top of this LED light source plate, this lampshade is the shell structure of bottom opening, this lampshade bottom is located at around these lens and LED light source plate, it is characterized in that, the bottom of these lens is just provided with the plane of incidence to this LED light source, the middle part of these lens is provided with refraction part, these lens the both sides of this refraction part or around be provided with the first luminous intensity distribution portion, these lens are arranged with the second luminous intensity distribution portion at the outer of this first luminous intensity distribution portion, the light near wherein axis direction that this LED light source sends reflects through the top of this refraction part this lampshade backward, the light of what this LED light source sent depart from wherein axis direction is launched towards the first luminous intensity distribution portion, the light away from wherein axis direction that this LED light source sends is launched towards this second luminous intensity distribution portion, this the first luminous intensity distribution portion and the second luminous intensity distribution portion are used for the light that will penetrate from this LED light source towards the sidewall of this lampshade or bottom refraction.

2. large-angle LED illuminating device according to claim 1, it is characterized in that, this lampshade and this lens are string configuration, this LED light source plate be to should lens arrange string configuration, this the first luminous intensity distribution portion comprises two the first refractive limits being separately positioned on these refraction part both sides, and this second luminous intensity distribution portion comprises two the second refraction limits being separately positioned on these both sides, the first luminous intensity distribution portion.

3. large-angle LED illuminating device according to claim 2, it is characterized in that, this first refractive limit comprises the first reflecting surface and first refractive face, this first reflecting surface is crossing with this first refractive face forms acute angle, this first refractive is arranged facing to the bottom of this lampshade or sidewall, this first reflecting surface is used for by light towards the reflection of this first refractive face, to make light behind this first refractive face towards the sidewall of this lampshade or bottom injection.

4. large-angle LED illuminating device according to claim 2, is characterized in that, this first refractive limit protrudes out setting relative to this refraction part towards the direction away from this LED light source.

5. large-angle LED illuminating device according to claim 4, it is characterized in that, this first reflecting surface is towards away from the sidewall of this lampshade or the arcuate structure of bottom protrusion, and this first refractive face is towards near the sidewall of this lampshade or the arcuate structure of bottom protrusion.

6. large-angle LED illuminating device according to claim 2, is characterized in that, this second refraction limit is disposed adjacent with this first refractive limit, and this second refraction limit protrudes out setting relative to this refraction part towards the direction away from this LED light source.

7. large-angle LED illuminating device according to claim 6, it is characterized in that, this the second refraction limit comprises the second reflecting surface and the second plane of refraction, this second reflecting surface is crossing with this second plane of refraction forms acute angle, this second reflecting surface is used for by light towards the reflection of this second plane of refraction, to make light after this second plane of refraction towards the sidewall of this lampshade or bottom injection.

8. large-angle LED illuminating device according to claim 2, it is characterized in that, this plane of incidence is towards the groove structure caved in away from this LED light source, this LED light source is arranged in this plane of incidence, this plane of incidence comprises the first incident section and is arranged on two the second incident sections of these both sides, the first incident section, this first incident section is the bottom surface of this refraction part, described second incident section respectively corresponding described first refractive limit and the second refraction limit is arranged, described second incident section convexes to form cambered surface towards this LED light source, described second incident section is used for converging light towards this first refractive limit and the second refraction limit.

9. large-angle LED illuminating device according to claim 1, it is characterized in that, these lens are rotation body structure, this the first luminous intensity distribution portion comprises the first annular refractive limit being separately positioned on this refraction part periphery, this the second luminous intensity distribution portion comprises and is arranged on peripheral second annular refractive limit, this first luminous intensity distribution portion, and this first annular refractive limit and this second annular refractive limit all protrude out setting towards the direction away from this LED light source.

10. the large-angle LED illuminating device according to any one of claim 1-9, is characterized in that, these lens are made into integration by transparent or semitransparent material.

11. large-angle LED illuminating devices according to claim 1, it is characterized in that, the scope of light and this axis angulation that what this LED light source sent depart from wherein axis direction is 3 degree to 45 degree, what this LED light source sent is 15 degree to 90 degree away from the wherein light of axis direction and the scope of this axis angulation, and the light away from wherein axis direction that light and this LED light source of what this LED light source sent depart from wherein axis direction send is disposed adjacent.