CN112539361B - High-uniformity blackboard lamp lens - Google Patents
High-uniformity blackboard lamp lens Download PDFInfo
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- CN112539361B CN112539361B CN202011464395.2A CN202011464395A CN112539361B CN 112539361 B CN112539361 B CN 112539361B CN 202011464395 A CN202011464395 A CN 202011464395A CN 112539361 B CN112539361 B CN 112539361B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Drawing Aids And Blackboards (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a high-uniformity blackboard lamp lens which is long-strip-shaped, wherein the left part of the lens is provided with a light inlet cavity, the right part of the lens is provided with a light outlet cavity, the two sides of the lens are provided with an A reflecting surface and a B reflecting surface, the upper part and the lower part of the light outlet cavity are provided with an upper light outlet surface and a lower light outlet surface, and the top end and the bottom end of the light outlet cavity are respectively provided with an A mounting structure and a B mounting structure; the light inlet cavity comprises a side surface A light inlet surface, a side surface B light inlet surface and an inclined bottom light inlet surface which are subjected to line sunning treatment; the included angle between the bottom light incident surface and the reference surface is 80-88 degrees; the light-emitting cavity comprises a side surface A light-emitting surface, a side surface B light-emitting surface and an inclined bottom light-emitting surface which are subjected to line sunning treatment; the LED light-emitting chip is arranged on one side of the light inlet cavity. The invention has uniform light emission, can effectively solve the glare problem of teachers, can not cause glare to students, and can solve the problems of rainbow spots and yellow spots on the edge of the blackboard surface.
Description
Technical Field
The invention belongs to the technical field of lighting lamps, and particularly relates to a high-uniformity blackboard lamp lens.
Background
With the increasing importance of the country on the eye health of teenagers, the reduction of the myopia rate of the teenagers becomes an important part of the deepened education and reform. The creation of comfortable and healthy eye environment is the key for protecting the eyesight health of students and promoting the high-efficiency learning of the students. According to research, the most urgent problem to be solved for blackboard lamps in classroom environments of primary and secondary schools is that (1) the blackboard surface illumination and uniformity are insufficient, cannot meet the basic requirements of national standards, and affects the eyesight health of students; (2) The blackboard lamp has a serious glare problem on teachers, which influences the teaching of the teachers, but the deflection angle of the lens is too large, which can cause glare on students; (3) The blackboard lamps and lanterns shine and have yellow spot or rainbow spot all around the facula on the blackboard face, influence the student and look over the blackboard face content, influence student and mr's comfort level of going on class.
Disclosure of Invention
The invention aims to provide an anti-glare high-uniformity blackboard lamp lens.
In order to solve the technical problem, the high-uniformity blackboard lamp lens is strip-shaped, the left part of the high-uniformity blackboard lamp lens is provided with a light inlet cavity, the right part of the high-uniformity blackboard lamp lens is provided with a light outlet cavity, and two sides of the high-uniformity blackboard lamp lens are provided with A reflecting surfaces b 1 And B reflecting surface B 2 The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c adopting a sun pattern 4 And a lower light-emitting surface c 5 The top end and the bottom end are respectively provided with an A mounting structure d 1 And B mounting structure d 2 (ii) a It is characterized in that the light inlet cavity comprises a side surface A light inlet surface a processed by adopting a sun print 1 And a side light incident surface A 3 And an inclined bottom light incident surface a 2 (ii) a Bottom light incident surface a 2 The included angle alpha between the reference surface and the reference surface is 80 degrees to 88 degrees; side surface light incident surface a 1 And a side light incident surface A 3 And a bottom light incident surface a 2 Are all plane; side surface incident light surface a 1 The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a 3 Forming an acute angle with the reference plane e; the light-emitting cavity comprises a side surface A light-emitting surface c processed by adopting a sun print 1 And a side light-emitting surface c of the B side surface 3 And an inclined bottom light-emitting surface c 2 (ii) a The LED light-emitting chip is arranged on one side of the light inlet cavity.
The A reflecting surface b 1 And B reflecting surface B 2 All are inward-bent reflecting cambered surfaces, A reflecting surface b 1 Has a cross-sectional arc length smaller than that of the reflecting surface B 2 Cross-sectional arc length of (a).
The bottom light emitting surface c 2 Is a cambered surface, and the included angle beta between the chord surface f and the reference surface e is 83-89 degrees.
The bottom light emitting surface c 2 The included angle beta between the plane and the reference plane e can be 83-89 degrees.
The side surface A is provided with a light-emitting surface c 1 Side surface of B light-emitting surface c 3 Are all plane, and the A side surface has a light-emitting surface c 1 An acute angle formed between the reference surface e and the light emergent surface c is smaller than that of the side surface B 3 An acute angle formed between the A side face and the reference plane e, and a light-emitting surface c of the A side face 1 Is less than the length of the light emergent surface c of the side surface B 3 Cross-sectional length of (a).
The side surface A is provided with a light-emitting surface c 1 And a side light-emitting surface c of the B side surface 3 Or can be cambered surface, and the side surface A is provided with a light-emitting surface c 1 The chord plane and the reference plane e form an acute angle smaller than the light-emitting plane c of the side surface B 3 The chord plane and the reference plane e form an acute angle, and the side surface A has a light-emitting surface c 1 Is less than the length of the section of the light emergent surface c of the side surface B 3 Cross-sectional length of (a).
The upper light-emitting surface c 4 And a lower light emitting surface c 5 Are all plane and the upper light-emitting surface c 4 Is less than the light emitting surface c below 5 Cross-sectional length of (a).
The A mounting structure d 1 And B mounting structure d 2 Are different in thickness.
Preferably, the bottom light incident surface a 2 The included angle alpha between the reference plane and the A side surface is 84.23 degrees, and the A side surface is a light incident surface a 1 An acute angle formed between the reference plane e and the B side light incident plane a is 15.6 degrees 3 An acute angle formed between the reference plane e and the reference plane e is 8.76 degrees; bottom light emitting surface c 2 Is a cambered surface, and the included angle beta between a chord surface f and a reference surface e is 87.63 degrees; side A light emitting surface c 1 And a side light-emitting surface c of the B side surface 3 Are all plane, and the A side surface has a light-emitting surface c 1 An acute angle formed between the reference plane e and the B side surface light-emitting surface c is 58.86 degrees 3 The acute angle with the reference plane e is 61.83 degrees.
Preferably, the bottom light incident surface a 2 The included angle alpha between the reference surface and the A side surface light incident surface a is 80.08 degrees 1 An acute angle formed between the reference plane e and the B side light incident surface a is 12.34 degrees 3 An acute angle of 6.44 degrees is formed between the base plane e and the reference plane e; bottom light emitting surface c 2 Is a plane, and forms an included angle beta of 87.63 degrees with the reference plane e; side A light emitting surface c 1 And a side light-emitting surface c of the B side surface 3 Are all cambered surfaces, and the side surface A is provided with a light-emitting surface c 1 The chord plane and the reference plane e form an acute angle of 58.86 degrees, and the side surface B light-emitting plane c 3 Is at an acute angle of 61.83 deg. to the base plane e.
Has the advantages that:
the lens of the blackboard lamp related in the invention emits light uniformly, the uniformity of the light irradiated on the blackboard surface with the height of 1200mm can reach 0.8, the illumination intensity is more than 500lx, and the national standard is met; the vertical distance between the installation position and the blackboard is short, and the lens does not need to rotate by too large angle, so that the glare problem of teachers can be effectively solved, and the glare of students can not be caused; the light-entering cavity surface and the light-emitting cavity surface of the blackboard lamp lens adopt a line-drying process, so that the problems of rainbow spots and yellow spots on the edge of the blackboard surface are solved; the blackboard lamp lens structure is small in size, light in weight and capable of reducing cost.
Drawings
FIG. 1 is a cross-sectional view of the present invention.
Fig. 2 is a schematic view of the overall structure of the present invention.
Fig. 3 is a polar plot of a light distribution curve of the present invention.
Fig. 4 is a view of the installation position of the present invention.
FIG. 5 is a simulation diagram of the light spot uniformity effect on the blackboard surface.
Detailed Description
In order to make the technical problems, technical solutions and effects solved by the present invention more clear, some embodiments are described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are exemplary only, and are not to be considered as limiting the invention.
The terms upper, lower, left, right, top, bottom, top surface, bottom surface, etc. are used only for clearly describing the positional relationship of the parts, but these terms should not be construed as limiting the scope of the present invention.
As shown in fig. 2, the high uniformity blackboard lamp lens of the present invention has an overall elongated shape.
As shown in figure 1, the high uniformity blackboard lamp lens of the invention has a light-in cavity at the left part, a light-out cavity at the right part, and reflecting surfaces A at the upper and lower sides 1 And B reflecting surface B 2 The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c 4 And a lower light emitting surface c 5 (ii) a For the matching of the blackboard lamp lens and the aluminum shell of the blackboard lamp, the top end and the bottom end of the blackboard lamp lens are respectively provided with an A mounting structure d convenient for mounting and fixing 1 And B mounting structure d 2 (ii) a The LED light-emitting chip is 3.5mm long, 2.8mm wide and 0.7mm thick, is arranged on one side of the light-entering cavity, and a set distance exists between the light-emitting surface of the LED light-emitting chip and the left end face of the blackboard lamp lens so as to improve heat dissipation; the long side of the LED light-emitting chip is parallel to the stretching direction of the blackboard lamp lens, and the short side of the LED light-emitting chip is parallel to the left end face of the blackboard lamp lens.
The light incident cavity comprises a side surface A light incident surface a adopting line sunning treatment 1 And a side light incident surface A 3 And an inclined bottom light incident surface a 2 (ii) a Bottom light incident surface a 2 The included angle alpha between the reference plane e and the reference plane e is 80-88 degrees; side surface incident light surface a 1 And a side light incident surface A 3 And a bottom light incident surface a 2 Are all plane; side surface light incident surface a 1 And a side light incident surface a of the B side surface 3 Inclined to the reference plane e, the light incident surface a of side A 1 The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a 3 Forming an acute angle with the reference plane e; side surface incident light surface a 1 Has a cross-sectional length greater than that of the light incident surface a on the side surface B 3 Cross-sectional length of (a). By arranging the A side light incident surface a 1 And B side light incident surface a 3 Is incident on the reflecting surface a 1 And B reflecting surface B 2 How much light is; by arranging the A side light incident surface a 1 And B side light incident surface a 3 To control the angle of inclination of the incident surface a to the reflecting surface b 1 And B reflecting surface B 2 The angle of the light.
The A reflecting surface b 1 And B reflecting surface B 2 All are inward-bent reflecting cambered surfaces; a reflecting surface b 1 Has a cross-sectional arc length smaller than that of the reflecting surface B 2 Cross-sectional arc length of (a).
The light-emitting cavity comprises a side A light-emitting surface c adopting line-drying treatment 1 Side surface of B light-emitting surface c 3 And an inclined bottom light-emitting surface c 2 . Bottom light-emitting surface c 2 Can be an inward-bent cambered surface, and the included angle beta between a chord plane f and a reference plane e is 83-89 degrees; bottom light emitting surface c 2 The included angle beta between the plane and the reference plane e is 83-89 degrees; side A light emitting surface c 1 And a side light-emitting surface c of the B side surface 3 The planes can be all planes which incline to the reference plane e respectively, and also can be all cambered surfaces which incline to the reference plane e respectively; side A light emitting surface c 1 Has a cross-sectional length smaller than that of the light emergent surface c of the side face B 3 Cross-sectional length of (a).
The upper light-emitting surface c 4 And a lower light-emitting surface c 5 Are all vertical planes processed by line drying, and the upper light-emitting surface c 4 Is less than the light emitting surface c below 5 Cross-sectional length of (a).
The cross-sectional lengths described above all refer to the lengths shown in fig. 1.
The side surface A is provided with a light incident surface a 1 And the B side light incident surface a 3 A reflection surface b 1 And B reflecting surface B 2 Side A light emitting surface c 1 And a side light-emitting surface c of the B side 3 And a top light-emitting surface c 4 And a light exit surface c above B 5 Adopt asymmetric design, all be synergistic effect and realized blackboard lamp lens polarisation to make from the facula of emergence more even.
The A mounting structure d 1 Is less than the thickness of the mounting structure D 2 The thickness of (2) so that an installer can distinguish the left end and the right end of the lens of the blackboard lamp and is used for fool proofing.
The bottom light incident surface a 2 Is smaller than the bottom light-emitting surface c 2 Is sized to enter the light surface a from the bottom 2 The incident light is sufficiently diffused.
Side surface light incident surface a 1 And a side light incident surface A 3 And a bottom light incident surface a 2 And a light emitting surface c above the A 4 And a light exit surface c above B 5 Side A light emitting surface c 1 Side surface of B light-emitting surface c 3 And a bottom light-emitting surface c 2 All through shining the line and handling, when solving the macula lutea problem, also can play even facula effect, improve blackboard face degree of consistency.
The transverse and longitudinal light distribution curve diagram of the blackboard lamp lens is shown in fig. 3, the transverse light emitting angle is 110 degrees, and the longitudinal light emitting angle is 23 degrees.
As shown in figure 4, the height of the blackboard is 1200mm, the distance between three blackboard lamps equipped with the blackboard lamp lens is 350mm, the distance between the light-emitting surface of the blackboard lamp lens and the blackboard is 430mm, and the vertical distance is 170mm. The graph of the uniform effect illumination of the blackboard lamp lens matched with the LED light-emitting chip is shown in figure 5. As can be seen from FIG. 5, the uniformity of the light on the surface of the blackboard with the height of 1200mm can reach 0.8, and the illumination intensity is more than 500lx.
The blackboard lamp lens is made of PMMA and is prepared by adopting an injection molding process.
Claims (2)
1. A high-uniformity blackboard lamp lens is in a strip shape, the left part of the lens is provided with a light inlet cavity, the right part of the lens is provided with a light outlet cavity, and the two sides of the lens are provided with A reflecting surfaces b 1 And B reflecting surface B 2 The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c adopting line-drying treatment 4 And a lower light-emitting surface c 5 The top end and the bottom end are respectively provided with an A mounting structure d 1 And B mounting structure d 2 (ii) a It is characterized in that the light incident cavity comprises a side surface A light incident surface a adopting line sunning treatment 1 And a side light incident surface A 3 And an inclined bottom light incident surface a 2 (ii) a The A side light incident surface a1, the B side light incident surface a3 and the bottom light incident surface a2 are planes; the light-emitting cavity comprises a side A light-emitting surface c adopting line-drying treatment 1 Side surface of B light-emitting surface c 3 And an inclined bottom light-emitting surface c 2 (ii) a The LED light-emitting chip is arranged on one side of the light-entering cavity; bottom light incident surface a 2 The included angle alpha between the reference surface and the A side surface light incident surface a is 84.23 degrees 1 An acute angle formed between the reference plane e and the B side light incident surface a is 15.6 degrees 3 An acute angle formed between the reference plane e and the reference plane e is 8.76 degrees; the bottom light emitting surface c 2 Is a cambered surface, the side surface A is a light-emitting surface c 1 Side surface of B light-emitting surface c 3 Are all plane; bottom light-emitting surface c 2 The included angle beta between the chord plane f and the reference plane e is 87.63 degrees; and the side surface A has a light-emitting surface c 1 An acute angle formed between the reference plane e and the B side surface light-emitting surface c is 58.86 degrees 3 An acute angle of 61.83 degrees is formed between the base plane e and the reference plane e; the A reflecting surface b 1 And B reflecting surface B 2 Are all inward-bent reflecting cambered surfaces, A reflecting surfaces b 1 Has a cross-sectional arc length smaller than that of the reflecting surface B 2 Cross-sectional arc length of (a).
2. A high-uniformity blackboard lamp lens is in a strip shape, the left part of the lens is provided with a light inlet cavity, the right part of the lens is provided with a light outlet cavity, and the two sides of the lens are provided with A reflecting surfaces b 1 And B reflecting surface B 2 The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c adopting line-drying treatment 4 And a lower light emitting surface c 5 The top end and the bottom end are respectively provided with an A mounting structure d 1 And B mounting structure d 2 (ii) a It is characterized in that the light inlet cavity comprises a side surface A light inlet surface a processed by adopting a sun print 1 And a side light incident surface A 3 And an inclined bottom light incident surface a 2 (ii) a Bottom light incident surface a 2 The included angle alpha between the reference plane and the reference plane is 80-88 degrees; side surface light incident surface a 1 And a side light incident surface A 3 And a bottom light incident surface a 2 Are all plane; side surface light incident surface a 1 The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a 3 Forming an acute angle with the reference plane e; the light-emitting cavity comprises a side A light-emitting surface c adopting line-drying treatment 1 Side surface of B light-emitting surface c 3 And an inclined bottom light-emitting surface c 2 (ii) a The LED light-emitting chip is arranged on one side of the light-entering cavity; side A light emitting surface c 1 Side surface of B light-emitting surface c 3 And a bottom light-emitting surface c 2 Are all cambered surfaces, and the bottom part is provided with a light emitting surface c 2 The included angle beta between the chord plane f and the reference plane e is 87.63 degrees; and the side surface A has a light-emitting surface c 1 The chord plane and the reference plane e form an acute angle of 58.86 degrees, and the side surface B light-emitting surface c 3 The chord plane of (a) and the reference plane (e) form an acute angle of 61.83 degrees; the A reflecting surface b 1 And B reflecting surface B 2 All are inward-bent reflecting cambered surfaces, A reflecting surface b 1 Has a cross-sectional arc length smaller than that of the reflecting surface B 2 Cross-sectional arc length of (a).
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| CN202011464395.2A CN112539361B (en) | 2020-12-09 | 2020-12-09 | High-uniformity blackboard lamp lens |
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| CN202011464395.2A CN112539361B (en) | 2020-12-09 | 2020-12-09 | High-uniformity blackboard lamp lens |
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| CN211060037U (en) * | 2019-12-25 | 2020-07-21 | 东莞雷笛克光学有限公司 | Inclined polarized lens and lamp |
| CN111609346A (en) * | 2020-05-28 | 2020-09-01 | 惠州雷士光电科技有限公司 | Blackboard lamp that sectional type throws |
| CN213746331U (en) * | 2020-12-09 | 2021-07-20 | 长春希达电子技术有限公司 | Blackboard lamp lens |
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