CN111765435B - Method for improving vertical illumination uniformity of blackboard lamp - Google Patents
Method for improving vertical illumination uniformity of blackboard lamp Download PDFInfo
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- CN111765435B CN111765435B CN202010673009.4A CN202010673009A CN111765435B CN 111765435 B CN111765435 B CN 111765435B CN 202010673009 A CN202010673009 A CN 202010673009A CN 111765435 B CN111765435 B CN 111765435B
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- lens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
Abstract
The invention discloses a blackboard lamp capable of improving the vertical illuminance uniformityA process for homogeneity comprising the steps, step (1): determining a horizontal distance x between the light source and the wall surface and a vertical distance y between the light source and the bottom of the blackboard; step (2): according to the top illumination LA of blackboard ═ phi/x2And the bottom illumination LC of the blackboard is phi/(x)2+y2) Calculating a proportionality coefficient delta (LA/LC), manufacturing a long-strip-shaped and outward-convex lens, wherein the thickness of the lens is gradually reduced from top to bottom, and determining the thickness t of the top of the lens according to the actual size requirementTop roofOr lens bottom thickness tBottomIn terms of delta-the thickness t of the top of the lensTop roofLens bottom thickness tBottomCalculating the thickness t of the top of the lensTop roofOr lens bottom thickness tBottom. The blackboard lamp manufactured by the invention has uniform illumination and less glare, and the unified glare value UGR of the lamp is less than or equal to 15 when the illumination uniformity of the blackboard surface is about 0.9.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a method for improving the vertical illumination uniformity of a blackboard lamp.
Background
The existing blackboard lamp, because it is not accurate to analyze the light output of the lamp to shine to the illumination of each area above and below the blackboard that sets up vertically quantitatively, it is unclear that the attenuation of the light is inversely proportional to the quadratic of the propagation distance (optical path) of the light, when the optical system of the lamp is designed, the directional emission and the light distribution of the light, and the structure of the lens filter to the light all lack the rational design, cause to shine in the upper and lower area of the blackboard, form the unusual bright eye of the area near the lamp, the area far away from the lamp looks dim, the uniformity is not good, there is the glare phenomenon at the same time. Therefore, there is a need for improvements in the prior art to avoid the disadvantages of the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for improving the vertical illumination uniformity of a blackboard lamp.
The invention is realized by the following technical scheme:
a method for improving the uniformity of vertical illumination of a blackboard lamp comprises the following steps,
step (1): determining a horizontal distance x between the light source and the wall surface and a vertical distance y between the light source and the bottom of the blackboard;
step (2): according to the top illumination LA ═ phi/x of the blackboard2And the bottom illumination LC of the blackboard is phi/(x)2+y2) Calculating a proportional coefficient delta to be LA/LC, manufacturing a long strip-shaped and outward convex lens, wherein the thickness of the lens is gradually reduced from top to bottom, and determining the thickness t of the top of the lens according to the actual size requirementTop roofOr lens bottom thickness tBottomIn terms of delta-the thickness t of the top of the lensTop roofLens bottom thickness tBottomCalculating the thickness t of the top of the lensTop roofOr lens bottom thickness tBottom。
Further, when the light source is a cambered surface light source, the thickness t of the bottom of the lens isBottomIs 1 mm.
Further, when the light source is a plane light source, the thickness t of the bottom of the lens isBottomIs 1.5 mm.
Further, Φ is a luminous output of the light source.
Further, the lens is provided with a first arc surface and a second arc surface.
Compared with the prior art, the invention has the advantages that through reasonable light splitting design of the lens, light rays are distributed and irradiated to a short distance less and light rays distributed and irradiated to a long distance more after passing through the lens, so that the illumination of the blackboard lamp is uniform, the glare is reduced, and when the illumination uniformity of the blackboard surface is about 0.9, the unified glare value UGR of the lamp is less than or equal to 15.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 view of illumination for improving uniformity of vertical illumination of a blackboard lamp according to the present invention.
In the figure: 1-a light source; 2, a wall surface; 3-the ground; 4-a lens; 5-blackboard; 6-a first arc surface; 7-second arc surface.
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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for improving the uniformity of the vertical illuminance of the blackboard lamp of the invention as shown in figure 1 comprises the following steps,
step (1): determining a horizontal distance x between the light source 1 and the wall surface 2 and a vertical distance y between the light source 1 and the bottom of the blackboard 5;
step (2): according to the top illumination LA of blackboard ═ phi/x2And the bottom illumination LC of the blackboard is phi/(x)2+y2) Calculating a ratio coefficient delta to be LA/LC, manufacturing a long and outward convex lens 4, gradually reducing the thickness of the lens 4 from top to bottom, and determining the thickness t of the top of the lens according to the actual size requirementTop roofOr lens bottom thickness tBottomIn terms of delta-the thickness t of the top of the lensTop roofLens bottom thickness tBottomCalculating the thickness t of the top of the lensTop roofOr lens bottom thickness tBottom。
Φ is the luminous output of the light source 1.
The lens 4 is provided with a first arc surface 6 and a second arc surface 7, and the first arc surface 6 and the second arc surface 7 have stronger focusing and diverging effects on light rays, so that the uniform brightness of the light rays irradiated at different distances can be controlled more conveniently.
Example 1
Determining a lens bottom thickness tBottom1mm, the horizontal distance x between the light source 1 and the wall surface 2 is 0.35m, the vertical distance y between the light source 1 and the bottom of the blackboard 5 is 1.2m, and the top thickness t of the lens is calculatedTop roof12.76mm, the illuminance of the blackboard lamp is uniform, the glare is less, and the unified glare value UGR of the lamp is less than or equal to 15 when the illuminance uniformity of the blackboard surface is about 0.9.
Example 2
Determining a lens bottom thickness tBottom1.5mm, the horizontal distance x between the light source 1 and the wall surface 2 is 0.5m, and the distance between the light source 1 and the bottom of the blackboard 5 isThe vertical distance y is 1.2m, and the thickness t of the top of the lens is calculatedTop roofThe thickness is 10.14mm, the illumination of the blackboard lamp is uniform, the glare is less, and the unified glare value UGR of the lamp is less than or equal to 15 when the illumination uniformity of the blackboard surface is about 0.9.
Through reasonable light splitting design of the lens 4, after light passes through the lens 4, the light with a short distribution irradiation distance is less, the light with a long distribution irradiation distance is more, the illumination of the blackboard lamp is uniform, glare is reduced, and when the illumination uniformity of the blackboard surface is about 0.9, the unified glare value UGR of the lamp is less than or equal to 15.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and equivalents thereof.
Claims (3)
1. A method for improving the uniformity of vertical illumination of a blackboard lamp is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step (1): determining a horizontal distance x between the light source and the wall surface and a vertical distance y between the light source and the bottom of the blackboard;
step (2): according to the top illumination LA of blackboard ═ phi/x2And the bottom illumination LC of the blackboard is phi/(x)2+y2) Phi is the light flux output of the light source, a proportionality coefficient delta is calculated to be LA/LC, a long strip-shaped and outward-convex lens is manufactured, the lens is provided with a first arc surface and a second arc surface, the thickness of the lens is gradually reduced from top to bottom, and the thickness t of the top of the lens is determined according to the actual size requirementTop roofOr lens bottom thickness tBottomIn terms of delta-the thickness t of the top of the lensTop roofLens bottom thickness tBottomCalculating the thickness t of the top of the lensTop roofOr lens bottom thickness tBottom。
2. The method for improving the uniformity of the vertical illuminance of a blackboard lamp according to claim 1, characterized in that: when the light source is a cambered surface light source, the thickness t of the bottom of the lensBottomIs 1 mm.
3. The method for improving the uniformity of the vertical illuminance of a blackboard lamp according to claim 1, characterized in that: when the light source is a plane light source, the thickness t of the bottom of the lensBottomIs 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010673009.4A CN111765435B (en) | 2020-07-14 | 2020-07-14 | Method for improving vertical illumination uniformity of blackboard lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010673009.4A CN111765435B (en) | 2020-07-14 | 2020-07-14 | Method for improving vertical illumination uniformity of blackboard lamp |
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| CN111765435A CN111765435A (en) | 2020-10-13 |
| CN111765435B true CN111765435B (en) | 2022-05-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287763A (en) * | 2011-08-09 | 2011-12-21 | 深圳亚锐光电科技有限公司 | Oriented emergent light lens |
| WO2015090134A1 (en) * | 2013-12-16 | 2015-06-25 | 宏力照明集团有限公司 | Method and device for greatly increasing irradiation range of street lamp |
| CN206846612U (en) * | 2017-06-30 | 2018-01-05 | 成都欧盛光电科技有限公司 | Spreadlight lens for blackboard lights |
| CN110486655A (en) * | 2019-07-23 | 2019-11-22 | 广东德洛斯照明工业有限公司 | A kind of lighting system of the cloth lamp on sound barrier |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5626059B2 (en) * | 2011-03-23 | 2014-11-19 | 市光工業株式会社 | Vehicle lighting |
| CN103807806B (en) * | 2014-01-22 | 2016-01-20 | 宏力照明集团有限公司 | The light distributing method of the COB module LED street lamp lens in 3,5 tracks can be irradiated to |
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2020
- 2020-07-14 CN CN202010673009.4A patent/CN111765435B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287763A (en) * | 2011-08-09 | 2011-12-21 | 深圳亚锐光电科技有限公司 | Oriented emergent light lens |
| WO2015090134A1 (en) * | 2013-12-16 | 2015-06-25 | 宏力照明集团有限公司 | Method and device for greatly increasing irradiation range of street lamp |
| CN206846612U (en) * | 2017-06-30 | 2018-01-05 | 成都欧盛光电科技有限公司 | Spreadlight lens for blackboard lights |
| CN110486655A (en) * | 2019-07-23 | 2019-11-22 | 广东德洛斯照明工业有限公司 | A kind of lighting system of the cloth lamp on sound barrier |
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| CN111765435A (en) | 2020-10-13 |
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Address after: 528400 Building D, No. 1, Yongxing North Road, Henglan, Zhongshan City, Guangdong Province Patentee after: Guangdong Shikang Lighting Technology Co.,Ltd. Address before: 2 / F, 14 Xinmao Industrial Avenue, Henglan Town, Zhongshan City, Guangdong Province, 528400 Patentee before: Guangdong Shikang Lighting Technology Co.,Ltd. |