CN111503558B - Close-range installation high-uniformity LED blackboard lamp lens - Google Patents
Close-range installation high-uniformity LED blackboard lamp lens Download PDFInfo
- Publication number
- CN111503558B CN111503558B CN202010344005.1A CN202010344005A CN111503558B CN 111503558 B CN111503558 B CN 111503558B CN 202010344005 A CN202010344005 A CN 202010344005A CN 111503558 B CN111503558 B CN 111503558B
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- light
- mirror body
- total reflection
- light incident
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- 238000009434 installation Methods 0.000 title claims abstract description 12
- 239000011324 bead Substances 0.000 claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 206010025421 Macule Diseases 0.000 abstract description 3
- 208000002173 dizziness Diseases 0.000 abstract description 3
- 235000009537 plain noodles Nutrition 0.000 description 8
- 238000005286 illumination Methods 0.000 description 7
- 230000004313 glare Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a near-installation high-uniformity LED blackboard lamp lens, which comprises a first light incident surface, a second free-form surface light incident surface, a total reflection surface, a first light emergent surface, a second light emergent surface and a lens body, wherein the lens body comprises a total reflection mirror body and a refraction mirror body; the lens for the near-mounted high-uniformity LED blackboard lamp eliminates the macula phenomenon generated by the rectangular facula edge formed by the LED chip of the LED lamp bead light source through the lens body by improving the surface parameters of the two light incident surfaces of the lens body; the rectangular light spots are more uniform by matching the total reflection curved surface of the total reflection mirror body and the second free light incident surface of the refraction mirror body with the first light emergent surface and the second light emergent surface; the light emitted by the lens of the blackboard lamp can not cause dizziness of eyes of a teacher, so that comfort of the teacher lamp and comfort of students when viewing blackboard contents are enhanced.
Description
Technical Field
The invention relates to the field of illumination, in particular to a lens of a near-mounted high-uniformity LED blackboard lamp.
Background
The LED is used as a fourth-generation illumination light source, and has the advantages of small volume, low power consumption, high brightness, high response speed and the like, thereby becoming a preferred energy-saving and environment-friendly light source. Because the LED light source is a lambertian light source, the light emitting angle is large, and a large amount of energy loss can be caused when the LED light source is directly used for illumination. Therefore, the secondary light distribution element is used for carrying out secondary light distribution on the LED light source, so that the utilization rate of the LED light source is improved. Common secondary light distribution elements include an LED lens and a reflector cup.
Most of the existing blackboard lamp lenses are at medium angles, and the cross section of the existing blackboard lamp lenses is the total internal reflection lens outline. During installation, the existing blackboard lamp is far away from the blackboard, light spots irradiated on the blackboard are uneven, yellow spots exist at the edges of the light spots, and the influence of large-angle light on glare of eyes of teachers, which is caused by poor light control effect, affects the actual use experience of the lamp.
Disclosure of Invention
The invention aims to provide a near-mounted high-uniformity LED blackboard lamp lens, which can solve the problems of uneven light spots, yellow spots on edges, serious glare and the like of the conventional blackboard lamp.
In order to achieve the above object, the following scheme is provided: the utility model provides a high degree of consistency LED blackboard lamp lens of short-range installation, this high degree of consistency LED blackboard lamp lens of short-range installation includes first income plain noodles, second free-form surface income plain noodles, total reflection curved surface, first play plain noodles, second play plain noodles and lens body, the lens body includes total reflection mirror body and refracting mirror body, total reflection mirror body and refracting mirror body structure as an organic whole, the downside and the refracting mirror body upside of total reflection mirror body are connected, first income plain noodles is located the left downside of total reflection mirror body, total reflection curved surface is located the upside of total reflection mirror body, first play plain noodles is located the right side of total reflection mirror body, second free-form surface income plain noodles is located the left side of refracting mirror body, second play plain noodles covers the right side and the downside of refracting mirror body.
Further, the first light-emitting surface is a plane or a free-form surface light-emitting surface slightly protruding outwards, the second light-emitting surface is a free-form surface light-emitting surface protruding outwards, and the first light-emitting surface and the second light-emitting surface are in smooth seamless connection.
Further, the first light incident surface is a plane or a free curved surface, the second free curved surface light incident surface is a concave free curved surface light incident surface for generating polarized light, and the first light incident surface and the second free curved surface light incident surface are in seamless connection in a 7 shape.
Further, the surfaces of the first light incident surface and the second free-form surface are both in a frosted structure.
Further, the upper right end of the total reflection mirror body is provided with a strip cube structure for assembly, and the lower left end of the refraction mirror body is also provided with a strip cube structure for assembly.
Further, the total reflection curved surface is a smooth curved surface or a scaly surface formed by combining a plurality of smooth curved surfaces.
Further, the first light-emitting surface and the second light-emitting surface are arc texture structural surfaces or frosted structural surfaces.
Further, the lens body is made of transparent materials.
Further, the lens body is formed by an injection molding process.
Further, when the LED lamp pearl light source of the short-distance-mounted high-uniformity LED blackboard lamp lens is used in combination with the short-distance-mounted high-uniformity LED blackboard lamp lens, a plurality of LED light sources are closely connected and arranged in a row according to the width of the LED lamp pearl light source, and the light emitting surface of the LED lamp pearl light source is positioned in a cavity formed by the first light incident surface and the second free-form surface.
The working principle and the advantages of the invention are as follows: the lens for the near-mounted high-uniformity LED blackboard lamp eliminates the macula phenomenon generated by the rectangular facula edge formed by the LED chip of the LED lamp bead light source through the lens body by improving the surface parameters of the two light incident surfaces of the lens body; the rectangular light spots are more uniform by matching the total reflection curved surface of the total reflection mirror body and the second free light incident surface of the refraction mirror body with the first light emergent surface and the second light emergent surface; the light emitted by the lens of the blackboard lamp can not cause dizziness of eyes of a teacher, so that comfort of the teacher lamp and comfort of students when viewing blackboard contents are enhanced.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is an assembly view of a blackboard lamp and blackboard with the intelligence of the present invention applied;
FIG. 5 is a polar graph of a light distribution curve of the present invention;
FIG. 6 is an illumination view of a blackboard with the blackboard lamp of the present invention applied thereto;
fig. 7 is a pseudo-color illumination chart of a blackboard to which the blackboard lamp of the present invention is applied.
Detailed Description
The following is a detailed description of the embodiments.
Reference numerals in the drawings of the specification include:
an LED lamp bead light source; 11a, a first light incident surface; 11b, a second free-form surface light incident surface; 12. a total reflection curved surface; 14a, a first light-emitting surface; 14b, a second light-emitting surface; 20. a lens body; 21. a total reflection mirror body; 22. refractive mirror body.
As shown in fig. 1 to 3, a close-range-mounted high-uniformity LED blackboard lamp lens includes a first light incident surface 11a, a second free-form surface light incident surface 11b, a total reflection surface 12, a first light emergent surface 14a, a second light emergent surface 14b, and a lens body 20, the lens body 20 includes a total reflection mirror body 21 and a refraction mirror body 22, the total reflection mirror body 21 and the refraction mirror body 22 are in an integral structure, the lower side of the total reflection mirror body 21 is connected with the upper side of the refraction mirror body 22, the first light incident surface 11a is located at the left lower side of the total reflection mirror body 21, the total reflection surface 12 is located at the upper side of the total reflection mirror body 21, the first light emergent surface 14a is located at the right side of the total reflection mirror body 21, the second free-form surface light incident surface 11b is located at the left side of the refraction mirror body 22, and the second light emergent surface 14b covers the right side and the lower side of the refraction mirror body 22.
The lens body 20 is a main structure body of the blackboard lamp lens, and is mainly divided into a total reflection mirror body 21 and a refraction mirror body 22, wherein the total reflection mirror body 22 is used for reflecting part of light rays emitted by the LED lamp bead light source 10, and the refraction mirror body 22 is used for refracting the light rays emitted by the LED lamp bead light source 10 to the blackboard surface as much as possible, so that the light rays emitted by the LED lamp bead light source 10 are more concentrated; the first light incident surface 11a is used for projecting light rays emitted by the LED light bead light source 10 onto the total reflection curved surface 12, the second free light incident surface 11b is used for projecting light rays of the LED light bead light source 10 onto the first light emergent surface 14a and the second light emergent surface 14b, the total reflection curved surface 12 can reflect light rays entering at the first light incident surface 11a onto the first light emergent surface 14a and the second light emergent surface 14b, and the first light emergent surface 14a and the second light emergent surface 14b can refract the light rays onto a blackboard.
As shown in fig. 1, the first light-emitting surface 14a is a planar or outwardly slightly convex free-form surface, the second light-emitting surface 14b is an outwardly convex free-form surface, and the first light-emitting surface 14a and the second light-emitting surface 14b are smoothly and seamlessly connected.
The first light emitting surface 14a and the second light emitting surface 14b are integrally and smoothly connected, so that shadows can be avoided when light passes through the two light emitting surfaces.
As shown in fig. 1 or fig. 3, the first light incident surface 11a is a plane or a free-form surface, the second free-form surface 11b is a concave free-form surface for generating polarized light, and the first light incident surface 11a and the second free-form surface 11b are seamlessly connected in a 7 shape.
The first light incident surface 11a is a plane or a free curved surface, and can direct and concentrate light onto the total reflection curved surface 12; the second free-form surface light-in surface 11b can irradiate the light of the LED light-bead light source 10 on the two light-out surfaces at a better angle.
The surfaces of the first light incident surface 11a and the second free-form surface light incident surface 11b are both frosted structures.
The two light incident surfaces are of frosted structures, so that the light of the LED lamp bead light source 10 can be prevented from being too intense and dazzling.
As shown in fig. 1, the upper right end of the total reflection mirror body 21 is provided with a long cubic structure for assembly, and the lower left end of the refraction mirror body 22 is also provided with a long cubic structure for assembly.
Wherein the elongated cube structures at the total reflecting mirror body 21 and the refracting mirror body 22 facilitate the installation of the blackboard lamp lens onto the lamp body of the blackboard lamp.
The total reflection curved surface 12 is a smooth curved surface or a scaly surface formed by combining a plurality of smooth curved surfaces.
The total reflection curved surface 12 is preferably a scaly surface formed by combining a plurality of smooth curved surfaces, and can emit light rays from multiple angles and reflect the light rays to a relatively concentrated position.
The first light emitting surface 14a and the second light emitting surface 14b are arc texture surfaces or frosted surfaces.
The two light-emitting surfaces are uneven and not smooth, and can refract light many times and prevent the light from being directly irradiated into eyes of a person.
The lens body 20 is made of transparent material.
The lens body 20 is formed by an injection molding process.
Among them, the lens body 20 is preferably made of PC.
As shown in fig. 4, in the blackboard lamp using the present blackboard lamp lens, the LED lamp bead light source 10 uniformly irradiates the blackboard with polarized light emitted from the present blackboard lamp lens, the horizontal distance from the light emitting surface of the blackboard lamp to the blackboard lamp is 350mm, the vertical distance is 350mm, and the height of the blackboard is 1300mm.
As shown in fig. 1, the length of the light emitting chip of the LED lamp bead light source 10 of the high-uniformity LED blackboard lens for short-distance installation is 3.5mm, the width is 2.8mm, and the height is 0.6mm, when the LED lamp bead light source 10 is used in combination with the high-uniformity LED blackboard lens for short-distance installation, a plurality of LED light sources are closely connected and arranged in a row according to the width of 2.8mm, and the light emitting surface of the LED lamp bead light source 10 is located in a cavity formed by the first light incident surface 11a and the second free-form surface 11b.
The light emitting surface of the LED bead light source 10 faces the refractive mirror 22, and the long side of the LED chip of the LED bead light source 10 is aligned with the total reflection curved surface of the total reflection lens 21, which can generate total internal reflection.
As shown in fig. 6 and 7, the present blackboard lamp lens is closely arranged with the LED lamp bead light sources 10 provided in a row to exhibit a uniform effect real illumination pattern and a pseudo-color illumination pattern as a whole.
As shown in fig. 5, the longitudinal light emission angle is about 15 degrees, the polarization is present, and the transverse light emission angle is about 80 degrees, which are the light distribution curves of the present blackboard lamp lens in the longitudinal and transverse directions.
The specific implementation process is as follows:
when the blackboard lamp is started, the LED lamp pearl light source 10 emits light, the light enters the refraction lens 22 through the second free-form surface light-in surface 11b, and then irradiates on the first light-out surface 14a and the second light-out surface 14b, and is refracted and irradiated on the surface of the blackboard through the two light-out surfaces; meanwhile, the light emitted from the side of the LED light source 10 enters the total reflection mirror body 21 through the first light incident surface 11a, and then irradiates the total reflection curved surface 12, the total reflection curved surface 12 reflects the light to the first light emergent surface 11a and the second light emergent surface 11b, and the two light emergent surfaces refract the light to the blackboard.
The near-mounted high-uniformity LED blackboard lamp lens eliminates the macula phenomenon generated by the edges of rectangular light spots formed by the LED chips of the LED lamp bead light source 10 through the lens body 20 by improving the surface parameters of the two light incident surfaces of the lens body 20; the rectangular light spots are more uniform by matching the total reflection curved surface 12 of the total reflection mirror body 21 and the second free light incident surface 11b of the refraction mirror body 22 with the first light emergent surface 14a and the second light emergent surface 14 b; the light emitted by the lens of the blackboard lamp can not cause dizziness of eyes of a teacher, so that comfort of the teacher lamp and comfort of students when viewing blackboard contents are enhanced.
The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (9)
1. A close-range installation high evenness LED blackboard lamp lens is characterized in that: the short-distance mounting high-uniformity LED blackboard lamp lens comprises a first light incident surface (11 a), a second free-form surface light incident surface (11 b), a total reflection surface (12), a first light emergent surface (14 a), a second light emergent surface (14 b) and a lens body (20), wherein the lens body (20) comprises a total reflection mirror body (21) and a refraction mirror body (22), the total reflection mirror body (21) and the refraction mirror body (22) are of an integrated structure, the lower side of the total reflection mirror body (21) is connected with the upper side of the refraction mirror body (22), the first light incident surface (11 a) is positioned at the left lower side of the total reflection mirror body (21), the total reflection surface (12) is positioned at the upper side of the total reflection mirror body (21), the first light emergent surface (14 a) is positioned at the right side of the total reflection mirror body (21), the second free-form surface light incident surface (11 b) is positioned at the left side of the refraction mirror body (22), and the second light emergent surface (14 b) covers the right side and the lower side of the refraction mirror body (22);
the first light-emitting surface (14 a) is a plane or an outwards slightly convex free-form surface light-emitting surface, the second light-emitting surface (14 b) is an outwards convex free-form surface light-emitting surface, and the first light-emitting surface (14 a) and the second light-emitting surface (14 b) are in smooth seamless connection.
2. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the first light incident surface (11 a) is a plane or a free curved surface, the second free curved surface light incident surface (11 b) is a concave free curved surface light incident surface for generating polarized light, and the first light incident surface (11 a) and the second free curved surface light incident surface (11 b) are in 7-shaped seamless connection.
3. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the surfaces of the first light incident surface (11 a) and the second free-form surface light incident surface (11 b) are both in frosted structures.
4. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the right upper end of the total reflection mirror body (21) is provided with a strip cube structure for assembly, and the left lower end of the refraction mirror body (22) is also provided with a strip cube structure for assembly.
5. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the total reflection curved surface (12) is a smooth curved surface or a scaly surface formed by combining a plurality of smooth curved surfaces.
6. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the first light-emitting surface (14 a) and the second light-emitting surface (14 b) are arc texture structural surfaces or frosted structural surfaces.
7. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the lens body (20) is made of transparent materials.
8. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the lens body (20) is formed by injection molding.
9. The near field installed high uniformity LED blackboard lamp lens according to claim 1, wherein: the LED lamp bead light source (10) of the short-distance installation high-uniformity LED blackboard lamp lens has the length of 3.5mm, the width of 2.8mm and the height of 0.6mm, and when the LED lamp bead light source (10) is combined with the short-distance installation high-uniformity LED blackboard lamp lens, a plurality of LED light sources are closely connected and arranged in a row according to the width of 2.8mm, and the light emitting surface of the LED lamp bead light source (10) is positioned in a cavity formed by the first light incident surface (11 a) and the second free-form surface light incident surface (11 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344005.1A CN111503558B (en) | 2020-04-27 | 2020-04-27 | Close-range installation high-uniformity LED blackboard lamp lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344005.1A CN111503558B (en) | 2020-04-27 | 2020-04-27 | Close-range installation high-uniformity LED blackboard lamp lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111503558A CN111503558A (en) | 2020-08-07 |
| CN111503558B true CN111503558B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010344005.1A Active CN111503558B (en) | 2020-04-27 | 2020-04-27 | Close-range installation high-uniformity LED blackboard lamp lens |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728502B (en) * | 2020-12-31 | 2022-12-06 | 美智光电科技股份有限公司 | Lenses and Lamps |
| CN113310031A (en) * | 2021-05-08 | 2021-08-27 | 江苏大学 | Polarizing lens of LED blackboard lamp |
| CN114963070B (en) * | 2021-06-28 | 2025-03-14 | 浙江光锥科技有限公司 | A projection lamp lens, a light emitting module and a projection lamp |
| CN114427673A (en) * | 2021-12-31 | 2022-05-03 | 赛尔富电子有限公司 | Lens and illumination method |
| CN116105093A (en) * | 2022-01-19 | 2023-05-12 | 厦门立达信照明有限公司 | Blackboard lamp lens and blackboard lamp |
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| CN111503558A (en) | 2020-08-07 |
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