CN114001321A - Atmosphere lamp with 3D effect - Google Patents
Atmosphere lamp with 3D effect Download PDFInfo
- Publication number
- CN114001321A CN114001321A CN202111297812.3A CN202111297812A CN114001321A CN 114001321 A CN114001321 A CN 114001321A CN 202111297812 A CN202111297812 A CN 202111297812A CN 114001321 A CN114001321 A CN 114001321A
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- China
- Prior art keywords
- lens
- light source
- effect
- reflector
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
-
- 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
- F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/05—Optical design plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2106/00—Interior vehicle lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention discloses an atmosphere lamp with a 3D effect, which comprises a lens, a light source component and a reflector, wherein the light source component is positioned between the lens and the reflector, the light source component and the lens and the light source component and the reflector are arranged at intervals, the lens is transparent and has certain reflectivity, and at least part of light rays emitted by the light source component are emitted into the lens at an acute angle of incidence. According to the invention, the 3D effect with different depths is formed by adopting a curved surface structure with radian or the 3D effect is achieved by adopting the display module through controlling the image change, which is not required to be the same as the prior art, the structure is simple, the cost is low, and the defect that the 3D effect cannot be formed due to the deformation of the structural part at the use moment is avoided.
Description
Technical Field
The invention relates to the technical field of atmosphere lamps, in particular to an atmosphere lamp with a 3D effect.
Background
The atmosphere lamp can build various atmospheres to meet the experience demand of the user, and different scenes need atmospheres with different light effects. There is also a need for an atmosphere lamp capable of backing up the atmosphere in a vehicle, and users have strong demand for this, so that the atmosphere lamp is increasingly applied to vehicles. Among them, the atmosphere lamp that can build 3D effect is also one of user's demands. The existing atmosphere lamp for creating the 3D effect is complex in structure or needs to be controlled by a display module to display and change, the cost is high due to the complex structure, the fault is easy to occur, and the service life and the user experience are reduced. For example, many existing atmosphere lamps with 3D effect need to use a structure with a certain arc curvature to reach different depths to form 3D effect, and such a structure is more costly and once the structure is deformed and the like without arc curvature, the 3D effect disappears, and the service life is reduced.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides an atmosphere lamp with 3D effect, which can solve the problem of creating 3D effect by atmosphere lamp.
The technical scheme for realizing the purpose of the invention is as follows: an atmosphere lamp with 3D effect comprises a lens, a light source component and a reflector, wherein the light source component is positioned between the lens and the reflector, and the light source component and the lens, the light source component and the reflector are arranged at intervals,
the lens is transparent and has a certain reflectivity,
at least a part of the light rays emitted by the light source component are emitted into the lens at an acute angle of incidence.
Further, the light source assembly, the lens and the reflector are fixedly connected at intervals by the connecting piece to be assembled together, or are assembled at intervals in the form of separate parts.
Further, the light source component comprises a plurality of bottom plates and a plurality of light emitting sources which are distributed and installed on each bottom plate.
Furthermore, a plurality of bottom plates enclose a closed ring, so that the luminous sources distributed on the bottom plates also enclose a closed ring.
Furthermore, all the light-emitting sources mounted on the same base plate are on the same straight line, and the distances from all the light-emitting sources on different base plates to the lens are the same.
Further, the lens, the light source assembly and the reflector are the same in outline shape, and the outline shape is triangular or rectangular or circular.
Further comprises a protective front shell and a protective rear shell which are fixedly connected together, a cavity is formed between the protective front shell and the protective rear shell, the lens, the light source component and the reflector are all arranged in the cavity,
at least one part of the area of one end of the protective front shell facing the lens is a transparent area.
Furthermore, the reflector is transparent and has a certain reflectivity, at least a part of light rays emitted by the light source component are emitted into the reflector at an acute angle of incidence, and the whole area of one end of the protective front shell facing the lens is a transparent area.
Furthermore, at least one part of the area of one end of the protective rear shell facing the reflection is a transparent area.
Further, the whole area of one end of the protective rear shell facing the reflection is a transparent area.
The invention has the beneficial effects that: according to the invention, the 3D effect with different depths is formed by adopting a curved surface structure with radian or the 3D effect is achieved by adopting the display module through controlling the image change, which is not required to be the same as the prior art, the structure is simple, the cost is low, and the defect that the 3D effect cannot be formed due to the deformation of the structural part at the use moment is avoided.
Drawings
FIG. 1 is an exploded schematic view of the present invention;
FIG. 2 is a schematic diagram of the working principle of the present invention;
FIG. 3 is a front view of a 3D effect display;
fig. 4 is a schematic view of the 3D effect from a left 45 ° viewing angle;
fig. 5 is a schematic view of the 3D effect from an upper 45 ° viewing angle;
FIG. 6 is a schematic view of the assembled structure;
FIG. 7 is a schematic diagram of the working principle of the mirror and mirror to obtain the image point;
in the figure, 1-protects the front shell, 2-lens, 3-light source component, 31-bottom plate, 32-light source, 4-reflector, 5-protects the back shell, 61-first ray, 62-second ray, 611-first sub-ray, 612-second sub-ray, 62-image point.
Detailed Description
The invention is further described below with reference to the drawings and the specific embodiments.
Example one
As shown in fig. 1-6, an atmosphere lamp with 3D effect includes a lens 2, a light source assembly 3 and a reflector 4, the light source assembly 3 is located between the lens 2 and the reflector 4, and the light source assembly 3 and the lens 2, and the light source assembly 3 and the reflector 4 are all arranged at intervals, that is, a certain distance is formed between the light source assembly 3 and the lens 2, and between the light source assembly 3 and the reflector 4. The light source assembly 3, the lens 2 and the reflector 4 may be assembled together by fixedly connecting them at intervals by connecting members, or may be assembled together at intervals in the form of separate parts.
In an alternative embodiment, the mirror 4 may be a flat mirror or a convex mirror, and the light rays may form an image point 62 on the mirror 4.
The lens 2 is transparent and has a certain reflectivity, that is, the lens 2 is completely transparent, the certain reflectivity means a reflectivity greater than 0 and less than 100%, and the transparency means an optical transparency greater than 0 and less than 1, so that a part of the light incident on the lens 2 penetrates out of the lens 2, and the other part of the light is reflected back to be incident on the reflector 4. For example, the lens 2 has a light transmittance of 10% and a reflectance of 90%, but may have a combination of light transmittance and reflectance of other parameter values.
The light source assembly 3 includes a plurality of base plates 31 and a plurality of light sources 32 disposed on each base plate 31, wherein at least a portion of the light emitted from each light source 32 is emitted into the lens 2 at an acute angle of incidence to prevent the light emitted from the light sources 32 from being emitted into the lens 2 at an angle of incidence perpendicular to the surface of the lens 2.
In an alternative embodiment, several bases 31 enclose a closed loop, so that the light sources 32 distributed on the bases 31 also enclose a closed loop, and the light sources 32 mounted on the same base 31 are in the same line, and the distances from all the light sources 32 on different bases 31 to the lens 2 are the same.
In an alternative embodiment, the lens 2, the light source assembly 3 and the reflector 4 are identically shaped, for example all triangular or rectangular or circular or other shapes. For example, a plurality of base plates 31 constitute a triangular frame, and the light source assembly 3 is formed by mounting the light emitting sources 32 on the base plates 31.
In an alternative embodiment, the atmosphere lamp further comprises a protective front shell 1 and a protective rear shell 5, the protective front shell 1 and the protective rear shell 5 are fixedly connected together by means of clamping or embedding or other mounting methods, a cavity is formed between the protective front shell 1 and the protective rear shell 5, and the lens 2, the light source assembly 3 and the reflector 4 are all mounted in the cavity, so that the atmosphere lamp can be integrally mounted on an automobile, for example, a front lamp or a rear lamp of the automobile body or an interior lamp in the automobile, so that a person can observe the atmosphere lamp to see a 3D effect. By installing the lens 2, the light source assembly 3 and the reflector 4 in the cavity, the parts can be effectively protected, and damage in the using process is prevented. Wherein, the one end that the shell just faced lens 2 before the protection has at least a partial region to be transparent region to the people's eye can see the 3D effect on the lens 2 through this transparent region. Preferably, the whole area of one end of the lens 2 is a transparent area, so that the 3D effect on the lens 2 can be completely seen, and the influence on the viewing effect caused by the shielding of part of the imaging points 62 by the protective front shell 1 is avoided.
The working principle is as follows: referring to fig. 2, a light source 32 of the light source assembly 3 emits two light rays (a first light ray 61 and a second light ray 62), the first light ray 61 enters the lens 2 at a certain angle (an acute angle), a part of the light ray (a first sub light ray 611) entering the lens 2 penetrates the lens 2 and forms an image point 62 on the lens 2, another part of the light ray (a second sub light ray 612) reflects from the lens 2 and then enters the reflector 4, the light ray reflected on the reflector 4 enters the lens 2 again at the same angle of incidence and forms a new image point 62 on the lens 2 again, and the operations are sequentially repeated, and the first sub light ray 611 is reflected by the reflector 4 for multiple times and forms multiple image points 62 on the lens 2 finally. Similarly, after the second sub-ray 612 is reflected by the reflector 4 for multiple times, multiple image points 62 are formed on the lens 2, and any two image points 62 do not overlap. Each imaging point 62 under the same light ray is in a straight line and the imaging distance from the lens 2 is increased continuously, the brightness of the imaging point 62 is higher when the imaging distance is shorter (i.e. the imaging point 62 is closer to the lens 2), and the brightness of the imaging point 62 is lower when the imaging distance is farther. When human eyes directly see the imaging point 62 on the lens 2 or see through the protective front shell 1, the light effect with different brightness can be seen, and a 3D effect is formed. When the lens 2 is a triangle or other closed structure, and the light source 32 of the light source assembly 3 forms a closed structure, the imaging points 62 formed on the lens 2 converge together with the increase of the imaging distance, and all the imaging points 62 form a closed and surrounding 3D effect, which has a more realistic 3D atmosphere, such as the closed and surrounding 3D effect shown in fig. 3-5, which forms a triangular closed 3D effect.
The end of the protective back shell 5 facing the reflector 4 is non-transparent.
According to the invention, the 3D effect with different depths is formed by adopting a curved surface structure with radian or the 3D effect is achieved by adopting the display module through controlling the image change, which is not required to be the same as the prior art, the structure is simple, the cost is low, and the defect that the 3D effect cannot be formed due to the deformation of the structural part at the use moment is avoided.
Example two
The difference from the first embodiment is that the reflector 4 is also transparent and has a certain reflectivity, and at least a part of the area of the end of the protective rear shell 5 facing the reflector 4 is a transparent area, so that human eyes can see the 3D effect on the reflector 4 through the transparent area. Preferably, the whole area of one end of the mirror 4 is transparent, so that the 3D effect on the mirror 4 can be completely seen, and the influence on the viewing effect caused by the shielding of part of the imaging points 62 by the protective rear shell 5 is avoided. The reflector 4 has the same function as the lens 2 of the first embodiment, so that the light emitted by the light source assembly 3 can penetrate out of the reflector 4 and obtain an image point 62 on the reflector 4, and then the 3D effect on the reflector 4 can be seen through the protective back shell 5.
Referring to fig. 7, in the embodiment, the light emitted by the light source assembly can obtain the image points 62 on the lens 2 and the reflector 4 at the same time, and the 3D effect can be respectively seen through the protective front shell and the protective rear shell, that is, the 3D effect can be seen from both the front and the back surfaces.
The invention can be used as an efficient lighting product to be applied to the field of new energy automobile lamps to replace the traditional decorative atmosphere lamp with high energy consumption, not only can play a role in lighting, but also has a role in atmosphere baking, the created 3D light effect has good modern science and technology sense, the visual impact force is great, the user is brought with good experience, the cost can be well reduced, and the efficiency can be well improved.
The embodiments disclosed in this description are only an exemplification of the single-sided characteristics of the invention, and the scope of protection of the invention is not limited to these embodiments, and any other functionally equivalent embodiments fall within the scope of protection of the invention. Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. An atmosphere lamp with 3D effect, which is characterized by comprising a lens, a light source component and a reflector, wherein the light source component is positioned between the lens and the reflector, and the light source component and the lens, the light source component and the reflector are arranged at intervals,
the lens is transparent and has a certain reflectivity,
at least a part of the light rays emitted by the light source component are emitted into the lens at an acute angle of incidence.
2. The ambience lamp with 3D effect as claimed in claim 1, wherein the light source assembly, the lens and the reflector are assembled together by fixedly connecting them at intervals via connectors, or alternatively, assembled together at intervals in the form of separate parts.
3. The ambience lamp with 3D effect as claimed in claim 1, wherein the light source assembly comprises a number of base plates and a number of light emitting sources mounted distributed on each base plate.
4. Ambience lamp with 3D effect according to claim 3, characterized in that several base plates enclose a closed ring, so that the luminous sources distributed mounted on the base plates also enclose a closed ring.
5. Atmosphere lamp with 3D effect according to claim 3 or 4 characterized in that the light sources mounted on the same base are in the same line and all light sources on different bases have the same distance to the lens.
6. The mood lamp with 3D effect as recited in claim 1, wherein the lens, the light source assembly, and the reflector have the same contour shape, and the contour shape is triangular or rectangular or circular.
7. The mood lamp with 3D effect as recited in claim 1, further comprising a protective front shell and a protective rear shell, the protective front shell and the protective rear shell being fixedly coupled together and defining a cavity therebetween, the lens, the light source assembly, and the reflector being mounted in the cavity,
at least one part of the area of one end of the protective front shell facing the lens is a transparent area.
8. The mood lamp with 3D effect as recited in claim 7, wherein the reflector is transparent and has a reflectivity, at least a portion of the light emitted from the light source module is emitted into the reflector at an acute angle of incidence, and the whole area of the end of the protective front shell facing the lens is transparent.
9. An ambience lamp with a 3D effect as claimed in claim 7, wherein at least a part of the end of the protective rear shell facing the reflection is transparent.
10. Atmosphere lamp with 3D effect according to claim 7, characterized in that the whole area of the end of the protective back shell facing the reflection is a transparent area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111297812.3A CN114001321A (en) | 2021-11-03 | 2021-11-03 | Atmosphere lamp with 3D effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111297812.3A CN114001321A (en) | 2021-11-03 | 2021-11-03 | Atmosphere lamp with 3D effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114001321A true CN114001321A (en) | 2022-02-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111297812.3A Pending CN114001321A (en) | 2021-11-03 | 2021-11-03 | Atmosphere lamp with 3D effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114001321A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607353A (en) * | 2003-10-14 | 2005-04-20 | 本田技研工业株式会社 | Automotive lighting apparatus |
| JP2006066130A (en) * | 2004-08-25 | 2006-03-09 | Koito Mfg Co Ltd | Marker lamp for vehicle |
| CN101187457A (en) * | 2006-10-24 | 2008-05-28 | 瓦莱奥.西尔瓦尼亚有限责任公司 | Three dimensional effect lamp assembly |
| CN102121655A (en) * | 2009-12-21 | 2011-07-13 | 法雷奥照明公司 | Signalling device for a vehicle with 3-D optical effect |
| CN102734701A (en) * | 2011-04-06 | 2012-10-17 | 索尼公司 | Light source device and display |
| CN103576303A (en) * | 2012-08-07 | 2014-02-12 | 堤维西交通工业股份有限公司 | Automotive composite reflection and refraction multiple-imaging device |
| CN203949066U (en) * | 2014-05-26 | 2014-11-19 | 比亚迪股份有限公司 | 3-D effect automobile lamp and the automobile with it |
| CN104421799A (en) * | 2013-09-02 | 2015-03-18 | 株式会社小糸制作所 | Vehicular Lamp |
| CN108895330A (en) * | 2018-03-30 | 2018-11-27 | 联想(北京)有限公司 | Electronic equipment |
| CN111219681A (en) * | 2019-01-15 | 2020-06-02 | 江西省绿野汽车照明有限公司 | Automobile lighting system and automobile |
| CN112797369A (en) * | 2019-11-14 | 2021-05-14 | 常州星宇车灯股份有限公司 | Light-emitting device for adjusting light of light-guide light-in end light source |
-
2021
- 2021-11-03 CN CN202111297812.3A patent/CN114001321A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607353A (en) * | 2003-10-14 | 2005-04-20 | 本田技研工业株式会社 | Automotive lighting apparatus |
| JP2006066130A (en) * | 2004-08-25 | 2006-03-09 | Koito Mfg Co Ltd | Marker lamp for vehicle |
| CN101187457A (en) * | 2006-10-24 | 2008-05-28 | 瓦莱奥.西尔瓦尼亚有限责任公司 | Three dimensional effect lamp assembly |
| CN102121655A (en) * | 2009-12-21 | 2011-07-13 | 法雷奥照明公司 | Signalling device for a vehicle with 3-D optical effect |
| CN102734701A (en) * | 2011-04-06 | 2012-10-17 | 索尼公司 | Light source device and display |
| CN103576303A (en) * | 2012-08-07 | 2014-02-12 | 堤维西交通工业股份有限公司 | Automotive composite reflection and refraction multiple-imaging device |
| CN104421799A (en) * | 2013-09-02 | 2015-03-18 | 株式会社小糸制作所 | Vehicular Lamp |
| CN203949066U (en) * | 2014-05-26 | 2014-11-19 | 比亚迪股份有限公司 | 3-D effect automobile lamp and the automobile with it |
| CN108895330A (en) * | 2018-03-30 | 2018-11-27 | 联想(北京)有限公司 | Electronic equipment |
| CN111219681A (en) * | 2019-01-15 | 2020-06-02 | 江西省绿野汽车照明有限公司 | Automobile lighting system and automobile |
| CN112797369A (en) * | 2019-11-14 | 2021-05-14 | 常州星宇车灯股份有限公司 | Light-emitting device for adjusting light of light-guide light-in end light source |
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