CN115013756A - Light-emitting device and lamp - Google Patents
Light-emitting device and lamp Download PDFInfo
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- CN115013756A CN115013756A CN202110247318.XA CN202110247318A CN115013756A CN 115013756 A CN115013756 A CN 115013756A CN 202110247318 A CN202110247318 A CN 202110247318A CN 115013756 A CN115013756 A CN 115013756A
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- light
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- emitting device
- reflecting portion
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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
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S6/00—Lighting devices intended to be free-standing
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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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
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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
- F21V7/00—Reflectors for light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to the technical field of lamps and discloses a light-emitting device and a lamp, wherein the light-emitting device comprises two light-emitting mechanisms which are arranged at intervals and form an included angle, and the light-emitting mechanisms comprise: the reflecting cup comprises a first reflecting part and a second reflecting part which are connected with each other, and the reflecting surface of the second reflecting part is a concave cambered surface; the first light-emitting assembly is arranged on one side, far away from the second light-reflecting portion, of the first light-reflecting portion and arranged along the length direction of the first light-reflecting portion, and the light part emitted by the first light-emitting assembly can irradiate the light-reflecting surface of the first light-reflecting portion and the light-reflecting surface of the second light-reflecting portion. Most of light rays emitted by the first light-emitting component are directly or reflected to the areas below and in front of the light-emitting mechanism, so that the utilization rate of the light rays is improved; the light emitted by the light-emitting device covers the right front part of the light-emitting device and the areas on the left side and the right side of the right front part, the illumination intensity is uniform, and visual fatigue is not easy to generate.
Description
Technical Field
The invention relates to the technical field of lamps, in particular to a light-emitting device and a lamp.
Background
In the existing desk lamp design in the market, most of the lampshade is of a decorative type, and the geometrical shape of the section of the desk lamp does not consider the matching of the angle of the lampshade, a reflective material and a light source; the light of the desk lamp directly irradiates the desktop, the illumination area comprises a bright spot area, a bright area and a dark light area from inside to outside, and the illumination intensity is extremely uneven. If the desk lamp is used for learning or working, eyes of people can be stimulated, and visual fatigue is easy to generate after a long time.
Therefore, a light emitting device and a lamp are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a light-emitting device and a lamp, which have uniform illumination intensity and are not easy to cause visual fatigue.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, a light emitting device is provided, including two intervals and the light emitting mechanism that is the contained angle setting, light emitting mechanism includes:
the reflecting cup comprises a first reflecting part and a second reflecting part which are connected with each other, and the reflecting surface of the second reflecting part is a concave cambered surface;
the first light-emitting assembly is arranged on one side, away from the second light reflecting portion, of the first light reflecting portion and is arranged along the length direction of the first light reflecting portion, and the light part emitted by the first light-emitting assembly can irradiate the light reflecting surface of the first light reflecting portion and the light reflecting surface of the second light reflecting portion.
As a preferable technical solution of the light emitting device, the reflective cup further includes a third reflective portion, the third reflective portion is connected to the first ends of the first reflective portion and the second reflective portion, and a reflective surface of the third reflective portion is a concave arc surface.
As a preferable embodiment of the light-emitting device, the curvature of the light-reflecting surface of the third light-reflecting portion is larger than the curvature of the light-reflecting surface of the first light-reflecting portion.
As a preferable technical solution of the light emitting device, the light reflecting surface of the first light reflecting portion is a concave arc surface, and a curvature of the light reflecting surface of the first light reflecting portion is smaller than a curvature of the light reflecting surface of the second light reflecting portion.
As a preferred technical solution of the light emitting device, the first light emitting assembly includes a first lamp panel and a plurality of first light emitting elements, and the plurality of first light emitting elements are arranged on the first lamp panel at intervals along a length direction of the first light reflecting portion;
the first lamp plate and the reflection surface of the first reflection portion are arranged in an acute angle.
As a preferred technical scheme of a light emitting device, the light emitting mechanism further includes a second light emitting assembly, which is disposed at the second end of the first light reflecting portion, and the second light emitting assembly includes a second lamp panel and a plurality of second light emitting members disposed along the length direction of the second lamp panel at intervals.
As an optimal technical scheme of the light emitting device, the first lamp panel and the second lamp panel are both PCBs.
As a preferred technical scheme of the light-emitting device, the light-emitting device further comprises a shell, wherein two light-transmitting openings are formed in the shell, the light-emitting mechanism is arranged in the shell, and the two light-emitting mechanisms are respectively positioned at the two light-transmitting openings;
the light-emitting mechanism further comprises a light-transmitting component, wherein the light-transmitting component comprises a light-transmitting plate, and the light-transmitting plate is arranged on the light-transmitting opening.
As a preferable technical solution of the light emitting device, the light transmission component further includes a honeycomb-shaped grating disposed at the light transmission opening.
In a second aspect, a luminaire is provided, comprising:
a lamp body;
the light-emitting device is arranged on the lamp body.
The invention has the beneficial effects that:
the light rays irradiated to the reflecting surface of the first reflecting part by the first light-emitting assembly are reflected to the lower part of the reflecting cup and the area outside the second reflecting part; the light irradiated to the reflecting surface of the second reflecting part is reflected to an area which is close to the reflecting cup and below the reflecting cup; a part of light emitted by the first light-emitting component irradiates an area below and in front of the reflecting cup; the most of the light emitted by the first light-emitting component is directly emitted or reflected to the area below and in front of the light-emitting mechanism, so that the utilization rate of the light is improved.
First light-emitting component sets up along the length direction of anti-light cup, can make light shine to anti-light cup uniformly on, shine to anti-light cup below and the light ratio in the place ahead more even. First light emitting component sets up and through the reflection of anti-light cup along anti-light cup's length direction, can make the light that light-emitting mechanism sent shine to light-emitting mechanism's below and the region in the place ahead uniformly, makes the illumination intensity of the light that light-emitting mechanism sent more even, is more close the natural light, is difficult for making the people produce visual fatigue. The two light-emitting mechanisms are arranged at an included angle, so that light rays emitted by the light-emitting mechanisms are crossed and can cover the area between the two light-emitting mechanisms, the light rays emitted by the light-emitting device can cover the area in the right front and the area at the left side and the right side of the right front of the light-emitting device, the illumination intensity is uniform, and visual fatigue is not easy to generate.
Drawings
FIG. 1 is a first schematic structural diagram of a light-emitting device according to the present invention;
FIG. 2 is a second schematic structural diagram of a light-emitting device according to the present invention;
FIG. 3 is a schematic diagram of a light-emitting mechanism provided by the present invention;
FIG. 4 is a schematic diagram illustrating a first partial structure of a light-emitting mechanism according to the present invention;
fig. 5 is a schematic view of a partial structure of a light emitting mechanism according to a second embodiment of the present invention.
In the figure: 10. a light emitting mechanism; 1. a light reflecting cup; 11. a first light reflecting portion; 12. a second light reflecting portion; 13. a third light reflecting portion; 2. a first light emitting assembly; 21. a first light emitting member; 22. a first lamp panel; 3. a second light emitting element; 31. a second light emitting member; 32. a second lamp panel; 4. a light transmissive component; 41. a light-transmitting plate; 42. a grating;
20. a housing; 201. a light-transmitting opening.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1 to 5, the present embodiment discloses a light emitting device, which includes two spaced light emitting mechanisms 10 disposed at an included angle.
The light emitting mechanism 10 comprises a reflective cup 1 and a first light emitting assembly 2, the reflective cup 1 comprises a first reflective part 11 and a second reflective part 12 which are connected with each other, and the reflective surface of the second reflective part 12 is a concave arc surface. The first light emitting assembly 2 is disposed on one side of the first light reflecting portion 11 far away from the second light reflecting portion 12, and is disposed along the length direction of the first light reflecting portion 11, and the light portion emitted by the first light emitting assembly 2 can irradiate the light reflecting surface of the first light reflecting portion 11 and the light reflecting surface of the second light reflecting portion 12. The second light reflecting portion 12 and the first light emitting element 2 are respectively disposed near front and rear sides of the light emitting device.
The light rays irradiated to the reflecting surface of the first reflecting part 11 by the first light-emitting component 2 are reflected to the areas below the reflecting cup 1 and outside the second reflecting part 12; the light irradiated to the reflecting surface of the second reflecting part 12 is reflected to the area which is near to the reflecting cup 1 and below the reflecting cup 1; a part of light emitted by the first light-emitting component 2 irradiates the area below and in front of the reflecting cup 1; most of the light emitted by the first light-emitting component 2 is directly emitted or reflected to the area below and in front of the light-emitting mechanism 10, so that the utilization rate of the light is improved.
The first light-emitting component 2 is arranged along the length direction of the reflection cup 1, so that light can be uniformly irradiated on the reflection cup 1, and the light irradiated below and in front of the reflection cup 1 is uniform. The first light-emitting component 2 is arranged along the length direction of the reflective cup 1 and is reflected by the reflective cup 1, so that light rays emitted by the light-emitting mechanism 10 can be uniformly irradiated to the area below and in front of the light-emitting mechanism 10, the illumination intensity of the light rays emitted by the light-emitting mechanism 10 is uniform and is relatively close to natural light, and visual fatigue of people is not easy to generate. The two light-emitting mechanisms 10 are arranged at an included angle, so that light rays emitted by the light-emitting mechanisms 10 are crossed, the area between the two light-emitting mechanisms 10 can be covered, the light rays emitted by the light-emitting device can cover the area in the right front and the area at the left side and the right side of the right front of the light-emitting device, the illumination intensity is uniform, and visual fatigue is not easy to generate.
In particular, the angle between the two light emitting means 10 is an obtuse angle, in particular 110 ° to 150 °, preferably 140 ° in the present embodiment. The reflecting surface of the first reflecting part 11 is a concave arc surface, and the curvature of the reflecting surface of the first reflecting part 11 is smaller and is similar to a plane shape; the curvature of the light reflecting surface of the first light reflecting part 11 is smaller than that of the light reflecting surface of the second light reflecting part 12, the curvature of the light reflecting surface of the second light reflecting part 12 is larger, and one side of the second light reflecting part 12 far away from the first light reflecting part 11 and the first light reflecting part 11 form an included angle of approximately 90 degrees.
First light-emitting component 2 includes first lamp plate 22 and a plurality of first light-emitting component 21, and a plurality of first light-emitting component 21 set up on first lamp plate 22 along first lamp plate 22's length direction interval ground. First lamp plate 22 is PCB, and first light-emitting component 21 specifically is RGBW lamp pearl for the lamp pearl, and the lamp pearl is integrated on first lamp plate 22, sets up the connector on first lamp plate 22, and first lamp plate 22 of being convenient for is connected with the power, can also control the luminance and the colour etc. of lamp pearl through first lamp plate 22. The first lamp panel 22 and the reflective surface of the first reflective portion 11 are disposed at an acute angle, so that most of the light emitted by the first light-emitting element 21 is irradiated on the reflective surfaces of the first reflective portion 11 and the second reflective portion 12, preferably, in this embodiment, the first lamp panel 22 and the reflective surface of the first reflective portion 11 form an included angle of 60 °.
The reflective cup 1 further comprises a third reflective portion 13, the third reflective portion 13 is connected to the first ends of the first reflective portion 11 and the second reflective portion 12, the third reflective portion 13 is located at one end, away from the two reflective cups 1, of each other, the reflective surface of the third reflective portion 13 is a concave arc surface, and the curvature of the reflective surface of the third reflective portion 13 is larger than that of the reflective surface of the first reflective portion 11. The side of the third light reflecting portion 13 remote from the first light reflecting portion 11 forms an angle of approximately 90 ° with the first light reflecting portion 11, and the difference in curvature between the third light reflecting portion and the second light reflecting portion 12 is small.
The light irradiated to the light reflecting surface of the third light reflecting part 13 is reflected to the area close to the first end of the light reflecting cup 1, so that the illumination intensity near the end part of the light reflecting cup 1 is almost the same as that in the middle area, and the phenomenon of dim edge is avoided.
The light emitting mechanism 10 further includes a second light emitting assembly 3 disposed at a second end of the first light reflecting portion 11, and the second light emitting assembly 3 includes a second lamp panel 32 and a plurality of second light emitting members 31 disposed along a length direction of the second lamp panel 32 at intervals. The second lamp panel 32 is a PCB, the second light-emitting component 31 is a lamp bead, specifically, an RGBW/rgbwo lamp bead, the lamp bead is integrated on the second lamp panel 32, and the second lamp panel 32 is provided with a plug connector, so that the second lamp panel 32 can be conveniently connected with a power supply; the brightness and color of the lamp beads can be controlled by the second lamp panel 32. The reflecting surfaces of the second lamp panel 32 and the second reflecting portion 12 are perpendicular to each other, so that most of light emitted by the second light emitting element 31 irradiates the reflecting surfaces of the first reflecting portion 11, the second reflecting portion 12 and the third reflecting portion 13, and the utilization rate of the light is improved.
The light emitted from the second light emitting component 3 to the second light reflecting portion 12 is reflected to the first end of the light reflecting cup, the two light emitting mechanisms 10 are arranged at an included angle, so that the light emitted from the light emitting mechanisms 10 is crossed, and the illumination brightness of the middle crossed area (i.e. the position right in front of the light emitting device) is higher than that of the two sides, namely the illumination intensity of the main using area is slightly higher, but the light emitted from the second light emitting component 3 can be emitted to the non-crossed area, so that the illumination intensity of the area illuminated by the light emitting device is more uniform.
Preferably the light emitting device further comprises a housing 20 and the light emitting means 10 further comprises a light transmissive component 4. Two light-transmitting openings 201 are formed in the housing 20, the light-emitting mechanism 10 is disposed in the housing 20, and the two light-emitting mechanisms 10 are respectively located at the two light-transmitting openings 201. Light from the light emitting mechanism 10 can be emitted through the light-transmitting opening 201 for illumination.
The light transmission component 4 includes a light transmission plate 41 and a honeycomb grating 42, the light transmission plate 41 is disposed on the light transmission opening 201 to seal the light transmission opening 201, and specifically, the light transmission plate 41 can be fixed on the housing 20 by bonding or clipping. The light-transmitting plate 41 can prevent dust from entering the housing 20, and protect the light-reflecting cup 1, the first light-emitting assembly 2 and the second light-emitting assembly 3 from being polluted and damaged. The grating 42 is disposed at the light-transmitting opening 201, and specifically, may be disposed at the inner side or the outer side of the light-transmitting plate 41, and may be fixed on the light-transmitting plate 41 by an adhesive manner, or may be integrally formed with the light-transmitting plate 41. The grating 42 can shield a part of light, so that the softness of the light is improved, and the light is prevented from being too strong and dazzling.
The embodiment also discloses a lamp, which comprises a lamp body and the light-emitting device, wherein the light-emitting device is arranged on the lamp body. The lamp can be a desk lamp, a floor lamp or a ceiling lamp.
The desk lamp using the light-emitting device has the advantages that light irradiates the desktop in front of the desk lamp, the desk lamp is mainly concentrated in the position in front of the desk lamp, the illumination brightness is uniform, and visual fatigue is not easily caused no matter a user learns or works.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The light-emitting device is characterized by comprising two light-emitting mechanisms (10) which are arranged at intervals and form an included angle, wherein each light-emitting mechanism (10) comprises:
the light reflecting cup (1) comprises a first light reflecting part (11) and a second light reflecting part (12) which are connected with each other, and the light reflecting surface of the second light reflecting part (12) is a concave arc surface;
the first light-emitting assembly (2) is arranged on one side, away from the second light-reflecting portion (12), of the first light-reflecting portion (11) and arranged along the length direction of the first light-reflecting portion (11), and the light part emitted by the first light-emitting assembly (2) can irradiate the light-reflecting surface of the first light-reflecting portion (11) and the light-reflecting surface of the second light-reflecting portion (12).
2. The light-emitting device according to claim 1, wherein the light-reflecting surface of the first light-reflecting portion (11) is a concave curved surface, and the curvature of the light-reflecting surface of the first light-reflecting portion (11) is smaller than that of the light-reflecting surface of the second light-reflecting portion (12).
3. The light-emitting device according to claim 1, wherein the reflector cup (1) further comprises a third reflector portion (13), the third reflector portion (13) is connected to the first ends of the first reflector portion (11) and the second reflector portion (12), and a reflective surface of the third reflector portion (13) is a concave arc surface.
4. A light-emitting device according to claim 3, characterized in that the curvature of the light-reflecting surface of the third light-reflecting portion (13) is larger than the curvature of the light-reflecting surface of the first light-reflecting portion (11).
5. The lighting device according to claim 1, wherein the first lighting assembly (2) comprises a first lamp panel (22) and a plurality of first lighting elements (21), the plurality of first lighting elements (21) are arranged on the first lamp panel (22) at intervals along the length direction of the first light reflecting part (11);
first lamp plate (22) with the acute angle setting is personally submitted with the reflection of light of first reflection of light portion (11).
6. The light-emitting device according to claim 5, wherein the light-emitting mechanism (10) further comprises a second light-emitting assembly (3) disposed at the second end of the first light-reflecting portion (11), and the second light-emitting assembly (3) comprises a second lamp panel (32) and a plurality of second light-emitting members (31) disposed at intervals along the length direction of the second lamp panel (32).
7. The lighting device of claim 6, wherein the first and second light panels (22, 32) are both PCBs.
8. The light-emitting device according to claim 1, further comprising a housing (20), wherein the housing (20) has two light-transmitting openings (201), the light-emitting mechanism (10) is disposed in the housing (20), and the two light-emitting mechanisms (10) are respectively located at the two light-transmitting openings (201);
the light-emitting mechanism (10) further comprises a light-transmitting component (4), wherein the light-transmitting component (4) comprises a light-transmitting plate (41) which is arranged on the light-transmitting opening (201).
9. A light emitting device according to claim 8, wherein the light transmissive member (4) further comprises a cellular grating (42) arranged at the light transmissive opening (201).
10. A light fixture, comprising:
a lamp body;
the lighting device of any one of claims 1-9, disposed on the luminaire body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247318.XA CN115013756B (en) | 2021-03-05 | 2021-03-05 | Light-emitting device and lamp |
| PCT/CN2022/077385 WO2022183947A1 (en) | 2021-03-05 | 2022-02-23 | Light-emitting device and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247318.XA CN115013756B (en) | 2021-03-05 | 2021-03-05 | Light-emitting device and lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115013756A true CN115013756A (en) | 2022-09-06 |
| CN115013756B CN115013756B (en) | 2023-07-21 |
Family
ID=83064944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110247318.XA Active CN115013756B (en) | 2021-03-05 | 2021-03-05 | Light-emitting device and lamp |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115013756B (en) |
| WO (1) | WO2022183947A1 (en) |
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| CN108180411A (en) * | 2012-12-21 | 2018-06-19 | 安溪县智睿电子商务有限公司 | A kind of luminance regulating method of desk lamp |
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| CN211010917U (en) * | 2019-11-28 | 2020-07-14 | 深圳市豪恩智能物联股份有限公司 | Desk lamp |
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| CN111998258A (en) * | 2020-08-18 | 2020-11-27 | 深圳市康视佳网络科技发展有限公司 | Eye-protecting lamp adopting ergonomic technology |
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| CN115013756B (en) | 2023-07-21 |
| WO2022183947A1 (en) | 2022-09-09 |
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