CN113551171B - Dizziness-preventing optical structure and illumination die - Google Patents
Dizziness-preventing optical structure and illumination die Download PDFInfo
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- CN113551171B CN113551171B CN202110832454.5A CN202110832454A CN113551171B CN 113551171 B CN113551171 B CN 113551171B CN 202110832454 A CN202110832454 A CN 202110832454A CN 113551171 B CN113551171 B CN 113551171B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 26
- 238000005286 illumination Methods 0.000 title claims abstract description 19
- 208000002173 dizziness Diseases 0.000 title abstract description 15
- 238000010586 diagram Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 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
- F21S6/00—Lighting devices intended to be free-standing
- F21S6/002—Table lamps, e.g. for ambient lighting
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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
- F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
- F21V5/004—Refractors for light sources using microoptical elements for redirecting or diffusing light using microlenses
-
- 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
- F21V5/008—Combination of two or more successive refractors along an optical axis
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
-
- 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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses an anti-dizziness optical structure, which comprises a light source, a first lens unit and a second lens unit. The light source is used for emitting light beams. The first lens unit is used for receiving the light beam emitted by the light source and diffusing the light beam. The second lens unit is provided with a flat second light incident surface and a second light emergent surface with a free-form surface structure, receives the light beam diffused by the first lens unit from the second light incident surface, and refracts and diffuses part of the light beam from the second light emergent surface. The second lens unit is used for carrying out total internal reflection on light rays with partial incident angles larger than or equal to a critical angle in the light beams diffused by the first lens unit. The optical structure of the invention can realize uniform large-angle (within 50 degrees) light distribution, and can effectively prevent human eye dizziness when the optical structure is used for normal working and study illumination.
Description
Technical Field
The invention relates to the technical field of lighting lamps (table lamps), in particular to an anti-dizziness optical structure and a lighting lamp.
Background
The current desk lamp market mainly uses direct type desk lamps and light guide plate type desk lamps as main stream lighting lamps, and the optical scheme of the two lighting lamps is simple and mature. The direct type desk lamp shown in fig. 1 mainly comprises a lamp body formed by a shell 1 and a mask 2, a light source plate arranged in the shell 1 and an LED light source 3. As shown in fig. 2, the light guide plate type desk lamp also comprises a lamp body formed by enclosing the shell 4 and the face mask 5, a reflective paper 6 arranged on the bottom surface of the shell 4, a light source plate and an LED light source 7 arranged on the side surface of the shell 4, and a light guide plate 8 arranged between the reflective paper 6 and the face mask 5.
However, the light distribution of the two lamps is basically lambertian, so that the illumination uniformity of the desktop is not high, which is specifically shown as follows: the brightness right below the lamp cap is too high, the table top right below the lamp cap is used as the center of a circle, and the illuminance is rapidly reduced along with the increase of the irradiation radius, so that the requirements of national standards on uniformity are hardly met. Meanwhile, as the light distribution is lambertian, the light is sufficient in a large-angle direction, the brightness is high, and the glare is strong when the device is used, so that the comfort level and the eye health are affected.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an anti-dizziness optical structure and a lighting lamp, which can realize uniform large-angle (within 50 degrees) light distribution, uniformly illuminate a desktop and effectively prevent human eye dizziness when the anti-dizziness optical structure is used for normal working and study lighting.
To achieve the above object, an embodiment of the present invention provides an anti-dizziness optical structure including a light source, a first lens unit, and a second lens unit.
The light source is used for emitting light beams.
The first lens unit is used for receiving the light beam emitted by the light source and diffusing the light beam.
The second lens unit is provided with a flat second light incident surface and a second light emergent surface with a free-form surface structure, receives the light beam diffused by the first lens unit from the second light incident surface, and refracts and diffuses part of the light beam from the second light emergent surface.
The second lens unit is used for carrying out total internal reflection on light rays with partial incident angles larger than or equal to a critical angle in the light beams diffused by the first lens unit.
In one or more embodiments of the present invention, the first lens unit is a light-expanding lens unit, the light-expanding lens unit has a concave first light-in surface and a convex first light-out surface, and the first light-in surface and the first light-out surface both adopt free-form surface structures.
In one or more embodiments of the present invention, the surface bus bar of the first light incident surface, the first light emergent surface, and the second light emergent surface conform to the following parameterized curves:
wherein P (t) is a curve control point; b (t) is a coordinate point on the curve; i is the ith control point; n is the number of control points; t is a coefficient, and its value is i/(n+1).
The embodiment of the invention also provides an illumination mould, which comprises a shell, a light source module, a first lens module and a second lens module.
The housing has a mounting cavity.
The light source module is configured in the mounting cavity and used for emitting light beams.
The first lens module is arranged in the mounting cavity and covers the light source module, and the first lens module receives and diffuses the light beam emitted by the light source module.
The second lens module is configured on the shell and covers the installation cavity, the second lens module comprises one or more second lens units arranged in an array mode, each second lens unit is provided with a flat second light inlet surface and a second light outlet surface with a free-form surface structure, and the second lens module receives the light beams diffused by the first lens module and refracts and diffuses part of the light beams.
The second lens module further performs total internal reflection on light rays with partial incident angles larger than or equal to a critical angle in the light beams diffused by the first lens module.
In one or more embodiments of the present invention, the first lens module includes one or more first lens units, and the light source module includes one or more LED light sources, each of which corresponds to one of the first lens units.
In one or more embodiments of the present invention, the first lens units each have a concave first light incident surface and a convex first light emergent surface, and the first light incident surface and the first light emergent surface each adopt a free-form surface structure.
In one or more embodiments of the present invention, the second light emitting surface of the second lens unit is configured in a concave structure.
In one or more embodiments of the present invention, the surface bus bar of the first light incident surface, the first light emergent surface, and the second light emergent surface conform to the following parameterized curves:
wherein P (t) is a curve control point; b (t) is a coordinate point on the curve; i is the ith control point; n is the number of control points; t is a coefficient, and its value is i/(n+1).
In one or more embodiments of the present invention, after the light emitted by the light source module is diffused by the first lens module and the second lens module, an included angle between the light emitted from the second light emitting surface and the second light incident surface is greater than or equal to 40 °.
In one or more embodiments of the present invention, the first lens module is a light-expanding lens module, the second lens module is a fly-eye lens module, an optical cavity is formed between the fly-eye lens module and the light-expanding lens module, and part of the light diffused by the first lens module is reflected by the fly-eye lens module and then folded back into the optical cavity.
Compared with the prior art, the anti-dizziness optical structure and the lighting lamp provided by the embodiment of the invention adopt the combination of the light expansion lens and the fly-eye lens, can realize uniform large-angle (within 50 degrees) light distribution, uniformly illuminate the desktop, and can effectively prevent human eyes from being dizziness when the anti-dizziness optical structure and the lighting lamp are used for normal working and learning.
Drawings
Fig. 1 is a schematic cross-sectional structure of a direct type desk lamp in the prior art;
FIG. 2 is a schematic cross-sectional view of a prior art light guide plate type desk lamp;
FIG. 3 is a schematic optical path diagram of an anti-blooming optical structure of an embodiment of the invention;
FIG. 4 is a perspective view of a lighting fixture according to an embodiment of the present invention;
FIG. 5 is a cross-sectional detail view of a lighting fixture of an embodiment of the present invention;
FIG. 6 is a graph comparing a table top illuminance distribution A of a lighting fixture according to an embodiment of the present invention with a table top illuminance distribution B of a lighting fixture according to the prior art;
fig. 7 is a diagram showing a comparison between a light distribution C of a lighting device according to an embodiment of the present invention and a light distribution D of a lighting device according to the related art.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 3, an embodiment of the present invention provides an anti-halation optical structure comprising a light source 10, a first lens unit 20 and a second lens unit 30.
The light source 10 is an LED light source for emitting a light beam.
The first lens unit 20 is a light-expanding lens unit, which has a concave first light-in surface 21 and a convex first light-out surface 22, and the first light-in surface 21 and the first light-out surface 22 are both in free-form surface structures. The first lens unit 20 is used for receiving the light beam emitted from the light source 10 and performing first diffusion on the light beam.
The second lens unit 30 is a fly-eye lens unit, which has a flat second light incident surface 31 and a second light emergent surface 32 with a free-form surface structure, and the second lens unit 30 receives the light beam diffused by the first lens unit 20 from the second light incident surface 31 and refracts and diffuses a part of the light beam from the second light emergent surface 32.
The second lens unit 30 further performs total internal reflection on a portion of the light beam diffused by the first lens unit 20, where the incident angle is greater than or equal to the critical angle.
In the above embodiment, since the refractive index n1 of the second lens unit 30 is larger than the refractive index n2 of air, when light enters the air with a lower refractive index from the second lens unit 30 with a higher refractive index, the refracted light will disappear when the incident angle is larger than a certain critical angle θc (the light is far away from the normal), and all the incident light will be reflected without entering the air with a lower refractive index.
Wherein the critical angle
In an embodiment, the surface bus bars of the first light incident surface 21, the first light emergent surface 22, and the second light emergent surface 32 conform to the following parameterized curves:
wherein P (t) is a curve control point, B (t) is a coordinate point on the curve, i is an ith control point, n is the number of control points, t is a coefficient, and the value is i/(n+1).
In an embodiment, the surface types of the first light incident surface 21, the first light emergent surface 22 and the second light emergent surface 32 can be precisely controlled by controlling and optimizing the parameters, so as to control the incident angle of the light, thereby realizing the control of the optical refraction direction and whether total internal reflection is performed.
The light distribution of prior art luminaires is substantially lambertian. The lambertian light distribution has the following law: light intensity at any angle = center light intensity × cos (θ). The lambertian light distribution tends to have low illuminance uniformity. Illuminance generally=light intensity/distance 2, as the irradiation radius increases, the distance from the irradiated position to the light source increases, and the relationship between illuminance and distance is inversely square, so that the speed of attenuation is high. In the application aspect of the desk lamp, the specific expression is as follows: the brightness right below the lamp cap is too high, the table top right below the lamp cap is taken as the center of a circle, and the illumination intensity is rapidly reduced along with the increase of the irradiation radius. Therefore, the optical structure in the prior art is difficult to meet the requirements of national standards on uniformity of contrast. Meanwhile, as the light distribution is lambertian, the light is sufficient in a large-angle direction, the brightness is high, and the glare is strong when the device is used, so that the comfort level and the eye health are affected. (luminance in any direction = intensity in that direction/light source projected area in that direction = center intensity =cos (θ)/light emitting surface area =center intensity/light emitting surface area. Luminance is therefore an amount that does not change with changes in direction, resulting in luminance that is still strong in large angular directions, affecting use).
As shown in fig. 3 to 5, an embodiment of the present invention further provides an illumination module, which includes a housing 400, a light source module 100, a first lens module 200 and a second lens module 300.
The housing 400 is composed of a bottom plate 401 and a side plate 402, and the side plate 402 and the bottom plate 401 enclose a mounting cavity 403. The light source module 100 and the first lens module 200 are disposed in the mounting cavity 403, and the second lens module 300 may be disposed on the side plate 402 by gluing and close the mounting cavity 403.
The light source module 100 includes one or more LED light sources arranged in an array, and the LED light sources are all disposed on the bottom plate 401 and are used for emitting light beams.
The first lens module 200 also includes one or more first lens units 20 arrayed on the base 401, where each first lens unit 20 corresponds to and covers one LED light source, and the first lens module 200 receives and diffuses the light beam emitted by the light source module 100.
The first lens unit 20 has a concave first light incident surface 21 and a convex first light emergent surface 22, and the first light incident surface 21 and the first light emergent surface 22 are both in free-form surface structures.
The second lens module 300 includes one or more second lens units 30 arranged in an array, each of the second lens units 30 has a flat second light incident surface 31 and a second light emergent surface 32 with a free-form surface structure, and the second light emergent surface 32 is configured as a concave surface structure. The second lens module 300 receives the light beam diffused through the first lens module 200 and refracts and diffuses a portion of the light beam.
The second lens module 300 further performs total internal reflection on a portion of the light beams diffused by the first lens module 200, where the incident angle is greater than or equal to the critical angle.
In an embodiment, the surface-type bus bars of the first light incident surface 21, the first light emergent surface 22 and the second light emergent surface 32 conform to the following parameterized curves:
wherein P (t) is a curve control point, B (t) is a coordinate point on the curve, i is an ith control point, n is the number of control points, t is a coefficient, and the value is i/(n+1).
The desktop illuminance distribution and the antiglare angle are used as optimization targets, and software (lighttools, etc.) is used to automatically control and optimize various parameters of the parameterized curve, so that the included angle θ between the light emitted from the second light emitting surface 32 and the second light incident surface 31 is greater than or equal to 40 ° after the light emitted from the light source module 100 is diffused by the first lens module 200 and the second lens module 300 respectively.
In one embodiment, the antiglare angle (included angle θ) has a trend relationship with the lens surface type in the second lens module, that is, the shallower the compound eye lens surface type concave, the smaller the antiglare angle; the deeper the compound eye lens surface type recess, the larger the antiglare angle.
In an embodiment, an optical cavity is formed between the first lens module 200 and the second lens module 300, and a portion of the light diffused by the first lens module 200 is reflected by the second lens module 300, and then returns back to the optical cavity and disappears.
As shown in fig. 6, fig. 6A is an illuminance distribution of a table top of an illumination mold of the present invention, and fig. 6B is an illuminance distribution of a table top of a conventional illumination mold (a table lamp in the background art); the color from white to black indicates the illuminance from large to small. By comparison, it can be clearly seen that the illumination distribution A of the illumination mould provided by the invention has small brightness variation and obviously larger illumination range compared with the illumination distribution B of the tabletop of the traditional illumination mould (the table lamp in the background technology), and the whole tabletop is uniform.
As shown in fig. 7, fig. 7 is a light distribution diagram of a lamp (C is a light distribution diagram of an illumination mold of the present invention; D is a light distribution diagram of a conventional lambertian type), and another parameter description of fig. 6 shows that, compared with the conventional lambertian type distribution (D), the illumination mold of the present invention has a wider angle and a wider irradiation range.
Compared with the prior art, the anti-dizziness optical structure and the lighting lamp provided by the embodiment of the invention adopt the combination of the light expansion lens and the fly-eye lens, can realize uniform large-angle (within 50 degrees) light distribution, uniformly illuminate the desktop, and can effectively prevent human eyes from being dizziness when the anti-dizziness optical structure and the lighting lamp are used for normal working and learning.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. An anti-glare optical structure comprising:
a light source that emits a light beam;
a first lens unit for receiving and diffusing the light beam emitted from the light source; and
the second lens unit is provided with a flat second light incident surface and a second light emergent surface with a free-form surface structure, and receives the light beam diffused by the first lens unit from the second light incident surface and refracts and diffuses part of the light beam from the second light emergent surface;
the second light-emitting surface of the second lens unit is configured into a concave structure;
the combination of the first lens unit and the second lens unit can realize uniform light distribution at an angle of 50 degrees or less;
the second lens unit is used for carrying out total internal reflection on light rays with partial incident angles larger than or equal to a critical angle in the light beams diffused by the first lens unit;
the first lens unit is a light-expanding lens unit, the light-expanding lens unit is provided with a first concave light-in surface and a first convex light-out surface, and the first light-in surface and the first light-out surface both adopt free-form surface structures;
the surface bus bar of the first light incident surface, the first light emergent surface and the second light emergent surface accords with the following parameterization curve:
wherein P (t) is a curve control point, B (t) is a coordinate point on the curve, i is an ith control point, n is the number of control points, t is a coefficient, and the value is i/(n+1).
2. An illumination die, comprising:
a housing having a mounting cavity;
the light source module is configured in the mounting cavity and used for emitting light beams;
the first lens module is arranged in the mounting cavity and covers the light source module, and the first lens module receives and diffuses the light beam emitted by the light source module; and
the second lens module is configured on the shell and covers the mounting cavity, and comprises one or more second lens units arranged in an array manner, each second lens unit is provided with a flat second light inlet surface and a second light outlet surface with a free-form surface structure, and the second lens module receives the light beams diffused by the first lens module and refracts and diffuses part of the light beams;
the second lens module is used for carrying out total internal reflection on light rays with partial incident angles larger than or equal to a critical angle in the light beams diffused by the first lens module;
the first lens module comprises one or more first lens units, the light source module comprises one or more LED light sources, and each LED light source corresponds to one first lens unit respectively;
the first lens units are respectively provided with a first concave light incident surface and a first convex light emergent surface, and the first light incident surface and the first light emergent surface are respectively in a free-form surface structure;
the second light-emitting surface of the second lens unit is configured into a concave structure;
the combination of the first lens unit and the second lens unit can realize uniform light distribution at an angle of 50 degrees or less;
the surface bus bar of the first light incident surface, the first light emergent surface and the second light emergent surface accords with the following parameterization curve:
p (t) is a curve control point, B (t) is a coordinate point on the curve, i is an ith control point, n is the number of control points, t is a coefficient, and the value of t is i/(n+1).
3. The illumination die according to claim 2, wherein the first lens module is a light-expanding lens module, the second lens module is a fly-eye lens module, an optical cavity is formed between the fly-eye lens module and the light-expanding lens module, and part of the light rays diffused by the light-expanding lens module are reflected by the fly-eye lens module and then reflected back into the optical cavity.
4. The illumination module according to claim 3, wherein an included angle between the light emitted from the second light emitting surface and the second light incident surface is greater than or equal to 40 ° after the light emitted from the light source module is diffused by the first lens module and the second lens module, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832454.5A CN113551171B (en) | 2021-07-22 | 2021-07-22 | Dizziness-preventing optical structure and illumination die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832454.5A CN113551171B (en) | 2021-07-22 | 2021-07-22 | Dizziness-preventing optical structure and illumination die |
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| Publication Number | Publication Date |
|---|---|
| CN113551171A CN113551171A (en) | 2021-10-26 |
| CN113551171B true CN113551171B (en) | 2023-09-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050055396A (en) * | 2003-12-08 | 2005-06-13 | 엘지전자 주식회사 | Optical device |
| CN105556374A (en) * | 2013-08-22 | 2016-05-04 | 飞利浦照明控股有限公司 | Optical system for uniform illumination |
| CN109154682A (en) * | 2016-05-19 | 2019-01-04 | 飞利浦照明控股有限公司 | Optical output device and design method |
| CN113126308A (en) * | 2021-04-16 | 2021-07-16 | 深圳市花生未来科技有限公司 | Optical module, display device and lighting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020085390A1 (en) * | 2000-07-14 | 2002-07-04 | Hironobu Kiyomoto | Optical device and apparatus employing the same |
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2021
- 2021-07-22 CN CN202110832454.5A patent/CN113551171B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050055396A (en) * | 2003-12-08 | 2005-06-13 | 엘지전자 주식회사 | Optical device |
| CN105556374A (en) * | 2013-08-22 | 2016-05-04 | 飞利浦照明控股有限公司 | Optical system for uniform illumination |
| CN109154682A (en) * | 2016-05-19 | 2019-01-04 | 飞利浦照明控股有限公司 | Optical output device and design method |
| CN113126308A (en) * | 2021-04-16 | 2021-07-16 | 深圳市花生未来科技有限公司 | Optical module, display device and lighting device |
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Denomination of invention: Anti dizziness optical structure and lighting mold Granted publication date: 20230919 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jiaxing Economic Development Zone sub branch Pledgor: Jiaxing Zhuoguang Intelligent Technology Co.,Ltd. Registration number: Y2024330000768 |