CN217235401U - LED down lamp - Google Patents
LED down lamp Download PDFInfo
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- CN217235401U CN217235401U CN202220718830.8U CN202220718830U CN217235401U CN 217235401 U CN217235401 U CN 217235401U CN 202220718830 U CN202220718830 U CN 202220718830U CN 217235401 U CN217235401 U CN 217235401U
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Abstract
The utility model discloses a LED down lamp relates to LED light source application technical field, including the light source board, reflector and lens, the light source board is used for luminous and half intensity angle to be 25 ~ 30 degrees, and the first end opening of reflector is used for installing the light source board, and the opening diameter of first end is 30 ~ 35 millimeters, and the second end opening of reflector is used for installing lens, and the opening diameter of second end is 62 ~ 68 millimeters, and the terminal surface of second end is 40 ~ 45 millimeters to the distance between the terminal surface of first end, and the lateral wall of reflector is the paraboloid shape, makes the illuminance degree of consistency high.
Description
Technical Field
The utility model relates to a LED light source application technique field especially relates to a LED down lamp.
Background
Illuminance uniformity refers to the ratio of the minimum illuminance to the average illuminance on a given surface. The more uniform the light distribution, the better the illumination, the more comfortable the visual perception, and the closer the illumination uniformity is to 1, the better; conversely, smaller and more visually fatiguing.
The LED down lamp is a directional lighting lamp which is embedded into a ceiling and emits light downwards, and the existing LED down lamp generally has the problem of low illuminance uniformity, so that the LED down lamp with high illuminance uniformity is urgently needed to meet the use requirement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a LED down lamp to solve the problem that above-mentioned prior art exists, make the illuminance degree of consistency high.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a LED down lamp, including light source board, reflector and lens, the light source board is used for luminous and the half intensity angle is 25 ~ 30 degrees, the first end opening of reflector is used for the installation the light source board, just the opening diameter of first end is 30 ~ 35 millimeters, the second end opening of reflector is used for the installation lens, just the opening diameter of second end is 62 ~ 68 millimeters, the terminal surface of second end arrives distance between the terminal surface of first end is 40 ~ 45 millimeters, the lateral wall of reflector is the paraboloid shape.
Preferably, the light source board is used for giving out light and half intensity angle is 30 degrees, the opening diameter of first end is 33 millimeters, the opening diameter of second end is 65 millimeters, the terminal surface of second end to the distance between the terminal surface of first end is 42 millimeters.
Preferably, the light source plate comprises a bearing plate, an outer ring light source, an inner ring light source and a central light source;
the central light source comprises a first LED lamp bead which is fixedly arranged at the center of the bearing plate;
the inner ring light source comprises 7-9 second LED lamp beads, each second LED lamp bead is uniformly distributed on the bearing plate around the corresponding first LED lamp bead, and the diameter of a circle in which the center of each second LED lamp bead is located is 16-21 mm;
the outer ring light source comprises 7-9 third LED lamp beads, the third LED lamp beads are uniformly distributed on the bearing plate around the first LED lamp beads, and the diameter of a circle where the center of each third LED lamp bead is located is 24-29 mm.
Preferably, the number of the second LED lamp beads is 8, and the diameter of a circle where the center of each second LED lamp bead is located is 18 mm; the number of the third LED lamp beads is 8, and the diameter of a circle where the center of each third LED lamp bead is located is 26 millimeters.
Preferably, the lens is a Fresnel lens, the pitch of the lens is 0.25-0.35 mm, the focal length of the lens is 65-75 mm, and the diameter of the lens is 63-68 mm.
Preferably, the pitch of the lens is 0.3 mm, the focal length of the lens is 70 mm, and the diameter of the lens is 65 mm.
The utility model discloses for prior art gain following technological effect:
the utility model provides a LED down lamp is 30 ~ 35 millimeters through the opening diameter who sets up the first end of reflector, and the opening diameter of second end is 40 ~ 45 millimeters to the distance between the terminal surface of first end for the terminal surface of 62 ~ 68 millimeters and second end, can make the illuminance degree of consistency higher to more accord with popular demand.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a reflector of an LED tube light provided by the present invention;
fig. 2 is a schematic view of a light source plate structure of the LED tube light provided by the present invention;
fig. 3 is a schematic view of a lens structure of the LED tube light provided by the present invention;
fig. 4 is a schematic diagram showing the relationship between illuminance uniformity and pitch variation.
In the figure: the LED lamp comprises a reflector 1, a reflector 11, a first end, a second end 12, a light source plate 2, a first LED lamp bead 21, a second LED lamp bead 22, a third LED lamp bead 23 and a lens 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a LED down lamp to solve the problem that above-mentioned prior art exists, make the illuminance degree of consistency high.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.
The utility model provides a LED down lamp, as shown in fig. 1-3, including light source board 2, reflector 1 and lens 3, light source board 2 is used for luminous and half intensity angle to be 25 ~ 30 degrees, 11 openings in first end of reflector 1 are used for installing light source board 2, and the opening diameter of first end 11 is 30 ~ 35 millimeters, 12 openings in second end of reflector 1 are used for installing lens 3, and the opening diameter of second end 12 is 62 ~ 68 millimeters, the distance between the terminal surface of second end 12 to the terminal surface of first end 11 is 40 ~ 45 millimeters, the lateral wall of reflector 1 is the paraboloid shape.
Wherein, reflector 1 will throw the light reflection outside the target illumination face scope to the target illumination in, although reflector 1's spotlight effect is not like lens 3, but the material cost of speculum and the cost of processing can be cheaper than lens 3, consequently, the utility model provides a LED down lamp, including being applicable to reflector 1 of low-angle (half intensity angle is 25 ~ 30 degrees) LED light source, the opening diameter through the first end 11 that sets up reflector 1 is 30 ~ 35 millimeters, and the opening diameter of second end 12 is the terminal surface of 62 ~ 68 millimeters and second end 12 and is 40 ~ 45 millimeters to the distance between the terminal surface of first end 11, can make the illuminance degree of consistency higher to more accord with popular demand.
Preferably, the light source board 2 is used for emitting light, and the half-intensity angle is 30 degrees, the opening diameter of the first end 11 is 33 mm, the opening diameter of the second end 12 is 65 mm, and the distance from the end surface of the second end 12 to the end surface of the first end 11 is 42 mm.
In this embodiment, the structure of the reflector 1 with the parabolic sidewall is optimized, the basic size of the reflector 1 is analyzed by a controlled variable method, including the opening diameters of the two ends, and the influence of the change of the distance from the end surface of the second end 12 to the end surface of the first end 11 on the illuminance uniformity and the maximum light intensity, or the basic size and the target value are compared and analyzed to obtain the optimal structural parameters, wherein the basic design parameters are set to be that the reflectivity of the reflecting surface is 95%, the distance from the light source plate 2 to the receiving surface is 2 meters, the load electric power of the LED light source is 3 watts, the luminous efficiency is 95 lumens per watt, the output luminous flux is 285 lumens, and the half-intensity angle is 30 degrees;
when the diameter of the opening of the first end 11 of the reflector 1 is 25 mm, the diameter of the opening of the second end 12 is 50 mm, and the distance from the end face of the second end 12 to the end face of the first end 11 is 30 mm, the uniformity of the illumination of the target plane is 0.78, and the average illumination is 320 lux;
when the diameter of the opening of the first end 11 of the reflector 1 is 30 mm, the diameter of the opening of the second end 12 is 50 mm, and the distance from the end surface of the second end 12 to the end surface of the first end 11 is 30 mm, the uniformity of the illumination of the target plane is 0.81, and the average illumination is 290 lux;
when the diameter of the opening of the first end 11 of the reflector 1 is 35 mm, the diameter of the opening of the second end 12 is 50 mm, the distance from the end surface of the second end 12 to the end surface of the first end 11 is 30 mm, the uniformity of the illumination of the target plane is 0.76, and the average illumination is 350 lux;
when the diameter of the opening of the first end 11 of the reflector 1 is 30 mm, the diameter of the opening of the second end 12 is 60 mm, the distance from the end surface of the second end 12 to the end surface of the first end 11 is 30 mm, the uniformity of the illumination of the target plane is 0.85, and the average illumination is 270 lux;
when the diameter of the opening of the first end 11 of the reflector 1 is 30 mm, the diameter of the opening of the second end 12 is 70 mm, the distance from the end surface of the second end 12 to the end surface of the first end 11 is 30 mm, the uniformity of the illumination of the target plane is 0.76, and the average illumination is 330 lux;
when the diameter of the opening of the first end 11 of the reflector 1 is 30 mm, the diameter of the opening of the second end 12 is 60 mm, the distance from the end surface of the second end 12 to the end surface of the first end 11 is 45 mm, the uniformity of the illumination of the target plane is 0.83, and the average illumination 268 lux is obtained;
when the diameter of the opening of the first end 11 of the reflector 1 is 30 mm, the diameter of the opening of the second end 12 is 60 mm, and the distance from the end surface of the second end 12 to the end surface of the first end 11 is 60 mm, the uniformity of the illumination of the target plane is 0.78, and the average illumination is 330 lux.
The illuminance uniformity of the light source at the focal position is preferably uniform while the maximum light intensity is maximum, and then the illuminance uniformity decreases gradually towards both sides, and the decreasing rate of the illuminance uniformity is relatively small when going to the left, and the decreasing rate of the illuminance uniformity is relatively fast when going to the right. In the light distribution curve, the light source is positioned at the right side of the focus, the light condensation effect is good, and obvious light intensity change exists, so glare is easily caused, while the light source is positioned at the left side of the focus, the light outlet angle is large, but the light condensation effect is poor. As a result of orthogonal optimization design, when the opening diameter of the first end 11 of the reflector 1 is 33 mm, the opening diameter of the second end 12 is 65 mm, and the distance from the end face of the second end 12 to the end face of the first end 11 is 42 mm, the uniformity of the illumination and the light intensity projected on a target plane can reach the maximum value.
Further, as shown in fig. 2, the light source plate 2 includes a bearing plate, an outer ring light source, an inner ring light source and a central light source; the central light source comprises a first LED lamp bead 21, and the first LED lamp bead 21 is fixedly arranged at the center of the bearing plate; the inner ring light source comprises 7-9 second LED lamp beads 22, each second LED lamp bead 22 is uniformly distributed on the bearing plate around the first LED lamp bead 21, and the diameter of a circle where the center of each second LED lamp bead 22 is located is 16-21 mm; the outer loop light source includes third LED lamp pearl 23, the quantity of third LED lamp pearl 23 is 7 ~ 9, each third LED lamp pearl 23 evenly lays on the loading board around first LED lamp pearl 21, the circle diameter at the center place of each third LED lamp pearl 23 is 24 ~ 29 millimeters, guarantee through dicyclo cross distribution light source distribution structure that light can evenly be emergent, and when the quantity of second LED lamp pearl 22 is 7 ~ 9, the circle diameter at the center place of each second LED lamp pearl 22 is 16 ~ 21 millimeters, the quantity of third LED lamp pearl 23 is 7 ~ 9, when the circle diameter at the center place of each third LED lamp pearl 23 is 24 ~ 29 millimeters, the even outgoing effect of light is better.
Preferably, the number of the second LED lamp beads 22 is 8, and the diameter of the circle where the center of each second LED lamp bead 22 is located is 18 mm; the quantity of third LED lamp pearl 23 is 8, and the circle diameter at the center place of each third LED lamp pearl 23 is 26 millimeters, and the even emergent effect of light is best.
Further, as shown in fig. 3, the lens 3 is a fresnel lens, the pitch of the lens 3 is 0.25 to 0.35 mm, the focal length of the lens 3 is 65 to 75 mm, and the diameter of the lens 3 is 63 to 68 mm, so that the lens 3 has good light-gathering capability, and the lens 3 is mainly used for guiding light emitted by the light source plate 2 into a target plane and improving the uniformity of the illumination of emergent light, wherein the pitch, the focal length and the diameter are all design parameters of the fresnel lens.
Preferably, the pitch of the lens 3 is 0.3 mm, the focal length of the lens 3 is 70 mm, the diameter of the lens 3 is 65 mm, and the uniformity of the illumination of the emergent light is optimal.
In the present embodiment, the pitch is optimized, specifically, the pitch is gradually increased from 0.02 mm to 0.4 mm at intervals of 0.02 mm, and optical simulation is performed. And calculating the illumination uniformity according to a 9-point test method adopted in the backlight field. As shown in fig. 4, the illuminance uniformity did not change much during the pitch increments from 0.1 mm to 0.2 mm, the illuminance uniformity increased rapidly during the increments from 0.2 mm to 0.3 mm, the illuminance uniformity was at a maximum when the pitch was 0.3 mm, and the illuminance uniformity started to decrease from this point onward. When the pitch is 0.1 mm, 0.16 mm and 0.2 mm, light is intensively incident to two sides of the target area, and the middle area is darker; when the pitch is 0.3 mm, the overall uniformity of the display area is best; when the pitch is larger than 0.3 mm, the illumination intensity of the two sides of the display area is larger than that of the middle area.
The focal length and the diameter are optimized by the same method as the pitch optimization, the focal length is increased from 55 mm to 85 mm at intervals of 1 mm, the diameter is increased from 50 mm to 75 mm at intervals of 1 mm, and the general trend of the illumination uniformity is known to be enhanced along with the increase of the focal length and the diameter through result analysis, and the illumination uniformity reaches a maximum value of 0.83 when the focal length and the diameter are respectively 70 mm and 65 mm.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. The utility model provides a LED down lamp which characterized in that: including light source board, reflector and lens, the light source board is used for luminous and half intensity angle to be 25 ~ 30 degrees, the first end opening of reflector is used for the installation the light source board, just the opening diameter of first end is 30 ~ 35 millimeters, the second end opening of reflector is used for the installation lens, just the opening diameter of second end is 62 ~ 68 millimeters, the terminal surface of second end arrives distance between the terminal surface of first end is 40 ~ 45 millimeters, the lateral wall of reflector is the paraboloid shape.
2. An LED downlight according to claim 1, wherein: the light source board is used for luminous and half intensity angle to be 30 degrees, the opening diameter of first end is 33 millimeters, the opening diameter of second end is 65 millimeters, the terminal surface of second end arrives distance between the terminal surface of first end is 42 millimeters.
3. An LED downlight according to claim 1, wherein: the light source plate comprises a bearing plate, an outer ring light source, an inner ring light source and a central light source;
the central light source comprises a first LED lamp bead which is fixedly arranged at the center of the bearing plate;
the inner ring light source comprises 7-9 second LED lamp beads, each second LED lamp bead is uniformly distributed on the bearing plate around the corresponding first LED lamp bead, and the diameter of a circle where the center of each second LED lamp bead is located is 16-21 mm;
the outer ring light source comprises 7-9 third LED lamp beads, the third LED lamp beads are uniformly distributed on the bearing plate around the first LED lamp beads, and the diameter of a circle where the center of each third LED lamp bead is located is 24-29 mm.
4. An LED downlight according to claim 3, wherein: the number of the second LED lamp beads is 8, and the diameter of a circle where the center of each second LED lamp bead is located is 18 mm; the number of the third LED lamp beads is 8, and the diameter of a circle where the center of each third LED lamp bead is located is 26 millimeters.
5. An LED downlight according to claim 1, wherein: the lens is a Fresnel lens, the pitch of the lens is 0.25-0.35 mm, the focal length of the lens is 65-75 mm, and the diameter of the lens is 63-68 mm.
6. An LED downlight according to claim 5, wherein: the pitch of the lens is 0.3 mm, the focal length of the lens is 70 mm, and the diameter of the lens is 65 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220718830.8U CN217235401U (en) | 2022-03-30 | 2022-03-30 | LED down lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220718830.8U CN217235401U (en) | 2022-03-30 | 2022-03-30 | LED down lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217235401U true CN217235401U (en) | 2022-08-19 |
Family
ID=82843870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220718830.8U Active CN217235401U (en) | 2022-03-30 | 2022-03-30 | LED down lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217235401U (en) |
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2022
- 2022-03-30 CN CN202220718830.8U patent/CN217235401U/en active Active
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