CN113551171A - Anti-dizziness optical structure and illumination mold - Google Patents
Anti-dizziness optical structure and illumination mold Download PDFInfo
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- CN113551171A CN113551171A CN202110832454.5A CN202110832454A CN113551171A CN 113551171 A CN113551171 A CN 113551171A CN 202110832454 A CN202110832454 A CN 202110832454A CN 113551171 A CN113551171 A CN 113551171A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 238000005286 illumination Methods 0.000 title claims description 28
- 208000002173 dizziness Diseases 0.000 title abstract description 12
- 238000009434 installation Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 23
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000011521 glass Substances 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
- 239000003086 colorant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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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
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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
- F21V5/008—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
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- 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
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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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses an anti-halation 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 incoming surface and a second light outgoing surface of a free-form surface structure, receives the light beams diffused by the first lens unit from the second light incoming surface, and refracts and diffuses partial light beams from the second light outgoing surface. And the second lens unit is used for carrying out total internal reflection on part of light rays with the incident angle larger than or equal to the critical angle in the light beam 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 eyes from dizziness when the optical structure is used for lighting for normal work learning.
Description
Technical Field
The present invention relates to the field of lighting lamp (desk lamp) technology, and is especially one kind of anti-dazzle optical structure and lighting lamp.
Background
The existing desk lamp market mainly uses a direct type desk lamp and a light guide plate type desk lamp as mainstream lighting lamps, and the optical schemes of the two lighting lamps are simple and mature in technology. Referring to fig. 1, the direct type desk lamp mainly includes a lamp body enclosed by a casing 1 and a cover 2, a light source board disposed in the casing 1, and an LED light source 3. As shown in fig. 2, the light guide plate type desk lamp also includes a lamp body enclosed by a casing 4 and a face mask 5, a reflective paper 6 disposed on the bottom surface of the casing 4, a light source plate and an LED light source 7 disposed on the side surface of the casing 4, and a light guide plate 8 disposed between the reflective paper 6 and the face mask 5.
However, the light distributions of the two lamps are substantially lambertian, which results in that the uniformity of the illumination of the desk surface is often not high, which is expressed as follows: the brightness under the lamp holder is too high, the desktop under the lamp holder is taken as the center of a circle, the illumination is rapidly reduced along with the increase of the irradiation radius, and the requirement of national standard on the uniformity of the illumination is difficult to meet. Meanwhile, because the light distribution is lambertian, the light is sufficient in the large-angle direction, the brightness is high, the glare is strong when the glasses are used, and 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 skilled in the art.
Disclosure of Invention
The invention aims to provide an anti-dizziness optical structure and an illuminating lamp, which can realize uniform large-angle (within 50 degrees) light distribution, uniformly illuminate a desktop, and effectively prevent human eyes from dizziness when the anti-dizziness optical structure is used for normal work learning illumination.
To achieve the above object, an embodiment of the present invention provides an anti-glare 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 incoming surface and a second light outgoing surface of a free-form surface structure, receives the light beams diffused by the first lens unit from the second light incoming surface, and refracts and diffuses partial light beams from the second light outgoing surface.
And the second lens unit is used for carrying out total internal reflection on part of light rays with the incident angle larger than or equal to the critical angle in the light beam diffused by the first lens unit.
In one or more embodiments of the present invention, the first lens unit is a light diffusing lens unit, the light diffusing lens unit has a concave first light incident surface and a convex first light emitting surface, and the first light incident surface and the first light emitting surface both adopt a free-form surface structure.
In one or more embodiments of the present invention, the surface-type generatrix of the first light incident surface, the first light emitting surface, and the second light emitting surface conforms to the following parametric curve:
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 whose value is i/(n + 1).
The embodiment of the invention also provides an illumination die, 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 configured in the mounting cavity and covers the light source module, and the first lens module receives the light beam emitted by the light source module and diffuses the light beam.
The second lens module is arranged on the shell and covers the installation cavity, the second lens module comprises one or more second lens units arranged in an array, 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.
And the second lens module is also used for carrying out total internal reflection on part of light rays with the incident angle larger than or equal to the critical angle in the light beam 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 the LED light sources corresponds to one of the first lens units.
In one or more embodiments of the present invention, each of the first lens units has a concave first light incident surface and a convex first light emitting surface, and the first light incident surface and the first light emitting surface both adopt free-form surface structures.
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-type generatrix of the first light incident surface, the first light emitting surface, and the second light emitting surface conforms to the following parametric curve:
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 whose value is i/(n + 1).
In one or more embodiments of the present invention, after the light emitted from 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 diverging 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 diverging lens module, and a part of the light rays diverging by the first lens module are reflected by the fly-eye lens module and then are refracted 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 a desktop, and can effectively prevent human eyes from dizziness when the anti-dizziness optical structure and the lighting lamp are used for normal work learning and illumination.
Drawings
FIG. 1 is a schematic cross-sectional view of a direct-type desk lamp in the prior art;
FIG. 2 is a schematic cross-sectional view of a light guide plate type desk lamp in the prior art;
FIG. 3 is a schematic optical path diagram of an anti-glare optical structure in accordance with an embodiment of the present 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 diagram comparing a desktop illuminance distribution A of an illumination fixture according to an embodiment of the present invention with a desktop illuminance distribution B of an illumination fixture according to the prior art;
fig. 7 is a comparison graph of the light distribution C of the illumination lamp according to the embodiment of the present invention and the light distribution D of the illumination lamp according to the related art.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 3, an embodiment of the present invention provides an anti-glare optical structure including 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 diffusing lens unit, the light diffusing lens unit has a concave first light incident surface 21 and a convex first light emitting surface 22, and the first light incident surface 21 and the first light emitting surface 22 both adopt a free-form surface structure. 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 having a flat second light incident surface 31 and a second light emitting 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 emitting surface 32.
The second lens unit 30 also performs total internal reflection on a part of the light beams 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 greater than the refractive index n2 of air, when a light ray enters the air of lower refractive index from the second lens unit 30 of higher refractive index, the refracted light ray will disappear when the incident angle is greater than a certain critical angle θ c (the light ray is away from the normal), and all the incident light ray will be reflected without entering the air of lower refractive index.
Wherein the critical angle
In one embodiment, the surface-type generatrix of the first light incident surface 21, the first light emitting surface 22, and the second light emitting surface 32 conforms to the following parametric curve:
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 the value is i/(n + 1).
In an embodiment, the surface shapes of the first light incident surface 21, the first light emitting surface 22, and the second light emitting surface 32 can be precisely controlled by controlling and optimizing the above parameters, so as to control the incident angle of the light, thereby controlling the optical refraction direction and whether the light is totally internally reflected.
The light distribution of the prior art luminaire is substantially lambertian. The lambertian light distribution has the following regularity: the intensity at any angle is the central intensity cos (θ). The uniformity of illuminance tends to be low with lambertian light distribution. The illumination intensity is generally equal to the light intensity/distance ^2, the distance between the illuminated position and the light source is increased along with the increase of the illumination radius, and the relationship between the illumination intensity and the distance is in inverse square relation, so the attenuation speed is high. In the aspect of the application of the desk lamp, the specific expression is as follows: the brightness under the lamp holder is too high, the desktop under the lamp holder is taken as the circle center, 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 requirement of national standard on the uniformity of the contrast. Meanwhile, because the light distribution is lambertian, the light is sufficient in the large-angle direction, the brightness is high, the glare is strong when the glasses are used, and the comfort level and the eye health are affected. (the brightness in any direction is the light intensity in that direction/the projected area of the light source in that direction is the central light intensity (θ)/the light emitting surface area (θ) is the central light intensity/the light emitting surface area).
As shown in fig. 3 to 5, an embodiment of the invention further provides an illumination mold, 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 to form 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 can be disposed on the side plate 402 by gluing and seal 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 disposed on the bottom plate 401 and configured to emit light beams.
The first lens module 200 also includes one or more first lens units 20 arranged in an array on the bottom plate 401, each first lens unit 20 corresponds to and covers one LED light source, and the first lens module 200 receives and diffuses light beams emitted from the light source module 100.
The first lens unit 20 has a concave first light incident surface 21 and a convex first light emitting surface 22, and the first light incident surface 21 and the first light emitting surface 22 both adopt 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 emitting surface 32 with a free-form surface structure, and the second light emitting surface 32 is configured as a concave surface structure. The second lens module 300 receives the light beam diffused by the first lens module 200 and refracts and diffuses a portion of the light beam.
The second lens module 300 also performs total internal reflection on a part of the light beams diffused by the first lens module 200, wherein the incident angle of the part of the light beams is greater than or equal to the critical angle.
In one embodiment, the surface-type generatrix of the first light incident surface 21, the first light emitting surface 22 and the second light emitting surface 32 conforms to the following parametric curve:
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 the value is i/(n + 1).
The illumination distribution and the anti-glare angle of the desktop are used as optimization targets, and software (such as lighttools) is used to automatically control and optimize various parameters of the parametric 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 respectively diffused by the first lens module 200 and the second lens module 300.
In one embodiment, the anti-glare angle (included angle θ) has a certain trend relation with the lens surface type in the second lens module, i.e. the shallower the fly-eye lens surface type depression is, the smaller the anti-glare angle is; the deeper the fly-eye lens surface-type depressions, the larger the antiglare angle.
In one 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 to the optical cavity and disappears.
As shown in fig. 6, fig. 6A is an illuminance distribution of a table top of the lighting mold of the present invention, and fig. 6B is an illuminance distribution of a table top of a conventional lighting mold (a table lamp in the background art); the colors from white to black indicate the illumination from large to small. By contrast, it can be clearly seen that the desktop illuminance distribution a of the illumination mold of the present invention has a small change in illuminance distribution brightness, a significantly larger illuminance range, and a uniform entire desktop compared to the desktop illuminance distribution B of the conventional illumination mold (a desk lamp in the background art).
As shown in fig. 7, fig. 7 is a light distribution diagram of a lamp (C is a light distribution diagram of the lighting mold of the present invention; D is a light distribution diagram of a conventional lambert type), and another parameter description of fig. 6 is also provided.
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 a desktop, and can effectively prevent human eyes from dizziness when the anti-dizziness optical structure and the lighting lamp are used for normal work learning and illumination.
The foregoing descriptions of specific exemplary embodiments of the present invention have been 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 certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and 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 (10)
1. An anti-glare optical structure, comprising:
a light source emitting a light beam;
a first lens unit receiving and diffusing a light beam emitted from the light source; and
the second lens unit is provided with a flat second light incoming surface and a second light outgoing surface with a free-form surface structure, receives the light beam diffused by the first lens unit from the second light incoming surface, and refracts and diffuses part of the light beam from the second light outgoing surface;
and the second lens unit is used for carrying out total internal reflection on part of light rays with the incident angle larger than or equal to the critical angle in the light beam diffused by the first lens unit.
2. The anti-glare optical structure of claim 1, wherein the first lens unit is a light diffusing lens unit, the light diffusing lens unit has a concave first light incident surface and a convex first light emitting surface, and both the first light incident surface and the first light emitting surface adopt a free-form surface structure.
3. The antiglare optical structure of claim 2, wherein surface-type generatrices of the first light entry surface, the first light exit surface, and the second light exit surface conform to the following parametric 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 the value is i/(n + 1).
4. An illuminated mold, 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 configured in the mounting cavity and covers the light source module, and receives and diffuses light beams emitted by the light source module; and
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 which are arranged in an array, each second lens unit is provided with a flat second light incoming surface and a second light outgoing 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;
and the second lens module is also used for carrying out total internal reflection on part of light rays with the incident angle larger than or equal to the critical angle in the light beam diffused by the first lens module.
5. The illumination mold of claim 4, wherein the first lens module comprises one or more first lens units, and the light source module comprises one or more LED light sources, and each LED light source corresponds to one first lens unit.
6. The illumination mold as claimed in claim 5, wherein the first lens unit has a concave first light incident surface and a convex first light emitting surface, and the first light incident surface and the second light emitting surface both adopt free-form surface structures.
7. The illumination mold as claimed in claim 6, wherein the second light emitting surface of the second lens unit is configured as a concave structure.
8. The illumination mold according to claim 7, wherein the surface-shaped generatrix of the first light incident surface, the first light emergent surface and the second light emergent surface conforms to the following parametric curve:
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, and t is a coefficient with the value of i/(n + 1).
9. The illumination mold according to claim 8, wherein the first lens module is a diverging 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 diverging lens module, and a part of the light rays diverging from the diverging lens module are reflected by the fly-eye lens module and then return to the optical cavity.
10. The illumination mold as claimed in claim 9, wherein the light emitted from the light source module is diffused by the first lens module and the second lens module, and 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 °.
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 |
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| CN113551171A true CN113551171A (en) | 2021-10-26 |
| CN113551171B CN113551171B (en) | 2023-09-19 |
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Citations (5)
| 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 |
| 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 | An optical system for producing uniform illumination |
| CN109154682A (en) * | 2016-05-19 | 2019-01-04 | 飞利浦照明控股有限公司 | Optics output equipment 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 |
-
2021
- 2021-07-22 CN CN202110832454.5A patent/CN113551171B/en active Active
Patent Citations (5)
| 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 |
| 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 | An optical system for producing uniform illumination |
| CN109154682A (en) * | 2016-05-19 | 2019-01-04 | 飞利浦照明控股有限公司 | Optics output equipment 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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| CN113551171B (en) | 2023-09-19 |
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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 |