CN104482437A - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- CN104482437A CN104482437A CN201410769108.7A CN201410769108A CN104482437A CN 104482437 A CN104482437 A CN 104482437A CN 201410769108 A CN201410769108 A CN 201410769108A CN 104482437 A CN104482437 A CN 104482437A
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- Prior art keywords
- light source
- light
- group
- lighting device
- light guide
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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
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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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
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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
- F21V15/00—Protecting lighting devices from damage
- F21V15/02—Cages
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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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
Abstract
The invention discloses a lighting device. The lighting device comprises an LED (Light Emitting Diode) light source and an optical element, wherein the optical element optically treats light emitted by the LED light source; the LED light source comprises a first group of light sources distributed in the center and a second group of light sources positioned around the first group of light sources; the optical element comprises a hollow light guide part and a light transmitting part connected with the light guide part; a cavity is formed in the middle of the light guide part; the light guide part is positioned above the second group of light sources; the light of the second group of light sources is guided in a first direction through the light guide part and then is emitted out of the lighting device through the light transmitting part; part of the light of the first group of light sources passes through the cavity of the light guide part and is finally emitted out of the lighting device from the light transmitting part; the other part of the light of the first group of light sources passes through the light guide part in a second direction and is emitted out of the lighting device; an included angle is formed between the second direction and the first direction.
Description
[technical field]
The present invention relates to a kind of lighting device, especially LED light device.
[background technology]
Along with the application of LED, the outward appearance of lighting device can be designed increasing shape and present profile and the light efficiency of more different-effects.Traditional light fixture or light source are generally the structure that housing combines with optical mask, along with the development of technology, have some light fixtures or illumination component to pursue effect attractive in appearance, also start to apply light guide plate or light-guiding pillar to realize lighting effects attractive in appearance.Chinese patent application discloses No. CN103117114A, disclose a kind of scene mask and landscape lighting device, it comprises the view light source in mask shell and described mask shell, and described view light source comprises the LED light source of at least one color, by the LED light source that controls different colours in view light source simultaneously or the luminescence of part, thus different landscape ornamental effects can be provided according to different landscape device demands.
But, along with the requirement of illumination apparatus is more and more higher, we start to pursue convenient for production, manufacture simple, easy for installation, be easy to the modularity lighting device changed.And the illuminator structure with aesthetic of the prior art cannot adapt to modular needs.
Therefore, in order to overcome above-mentioned defect, be necessary the lighting device that a kind of improvement is provided.
[summary of the invention]
The object of the present invention is to provide a kind of lighting device.
To achieve these goals, the present invention adopts following technical scheme: a kind of lighting device, comprise LED light source, and the light that LED light source sends is carried out to the optical element of optical treatment, first group of light source that described LED light source comprises the center of being distributed in and the second group of light source be positioned at around first group of light source, the transmittance section that described optical element comprises hollow light guide section and is connected with described light guide section, the middle part of described light guide section forms cavity, described light guide section is positioned at the top of described second group of light source, the light of second group of light source again by described transmittance section penetrates described lighting device after leaded light by described light guide section on a first direction, the some light of described first group of light source is by finally penetrating described lighting device from described transmittance section after the cavity of described light guide section, another part light of described first group of light source penetrates described lighting device by described light guide section in a second direction, angle is formed between described second direction and described first direction.
Preferably, described light guide section in a first direction lengthwise extends, described transmittance section extends at second direction lengthwise, and described transmittance section width is in a second direction wider than width in a first direction, and described light guide section width is in a first direction wider than width in a second direction.
Preferably, light guide section and the transmittance section of described optical element are one-body molded, and described transmittance section is extended from described light guide section.
Preferably, the light guide section of described optical element is externally cylindrical, has at least one cross section for annular.
Preferably, first group of light source of described LED light source and second group of light source are positioned at same plane.
Preferably, described lighting device also comprises housing, and described housing has host cavity, and described LED light source is arranged in the host cavity of described housing thus is fixed on described housing, and described optical element is connected with described housing.
Preferably, described lighting device also comprises the diffusion layer of annular, and described diffusion layer, between described second group of light source and described light guide section, plays diffusion to the light of second group of light source.
Preferably, described lighting device also comprises support component, and described housing and described support component form the first reflection cavity and the second reflection cavity, and described cavity connects described first reflection cavity, and described light guide section or described diffusion layer connect described second reflection cavity.
Preferably, described diffusion layer is the diffuser plate of the host cavity being arranged in described housing, is positioned at the light inlet of described light guide section.
Preferably, described lighting device also comprises support component, described support component is fixed on the bottom of the host cavity of described housing, there is the reflecting part of a hollow, the sidewall of described reflecting part surrounds closed annular, thus forming a cavity, described first group of light source is positioned at the inner side of described reflecting part, and described second group of light source is positioned at the outside of described reflecting part.
Preferably, described reflecting part is the cylindrical of hollow, and its outer wall has the support portion of step, and the inside of described housing sidewall has step-like supporting walls, and described support portion and supporting walls position correspondence, common support fixes described diffusion layer.
Preferably, described support component also comprises the base with opening, and described base is connected with described reflecting part, and described opening at least comprises the first opening be positioned at inside described reflecting part, and described first group of light source is positioned at described first opening part.
Preferably, described base is annular, the maximum gauge of described bottom is greater than the maximum gauge of described reflecting part, comprise the Part I being positioned at described reflecting part inside and the Part II being positioned at described reflecting part outside, described first opening is positioned at described Part I, the inwall of described Part I and reflecting part forms the first reflection cavity, and the some light of described first group of light source is by optical element described in directive after the reflection of described first reflection cavity.
Preferably, described Part II also comprises some second openings, described second group of light source is corresponding with described second opening, and be positioned at described second opening one to one, outer wall and the described housing of described Part II, reflecting part form the second reflection cavity, and the some light of second group of light source is through diffusion layer described in the reflection mixed light of described second reflection cavity and directive.
Preferably, described lighting device also comprises diffusion part, and described diffusion part is arranged in the cavity of described light guide section or the cavity of described support member, and the light of described first group of light source is by transmittance section described in directive again after described diffusion part process.
Preferably, the described diffusion part being positioned at described cavity is shaping separately and be fixed on described transmittance section, or one-body molded with described transmittance section, or is formed on described transmittance section after described transmittance section is shaping again.
Preferably, described diffusion part in dish, comprise circular pedestal and extend from described pedestal, diameter expands and smooth extension gradually, described diffusion part has some fins towards the surface of described transmittance section.
Preferably, described fin is curved.
Preferably, described diffusion part also comprises becket, and described becket between described diffusion part and described transmittance section, and is positioned at the junction of described pedestal and extension.
Preferably, described transmittance section is cylindrical, and the maximum gauge of described transmittance section is greater than the maximum gauge of described light guide section, and described transmittance section height is in a first direction less than described light guide section height in a first direction.
Compared to prior art, lighting device of the present invention has following advantage: optical effect can variation, attractive in appearance, and structure is simple, manufactures, easy for installation.
[accompanying drawing explanation]
Fig. 1 is the side view of lighting device of the present invention.
Fig. 2 is the three-dimensional exploded view of lighting device of the present invention.
Fig. 3 is the sectional view of lighting device of the present invention.
[detailed description of the invention]
Please refer to shown in Fig. 1 to Fig. 3, a kind of lighting device 1 of present pre-ferred embodiments, comprise LED light source 11 and the light that LED light source 11 sends is carried out to the optical element 12 of optical treatment.First group of light source 111 that LED light source 11 comprises the center of being distributed in and the second group of light source 112 be positioned at around first group of light source 111, the transmittance section 121 that optical element 12 comprises hollow light guide section 120 and is connected with light guide section 120.The middle part of light guide section 120 forms cavity 123, and light guide section 120 is positioned at the top of second group of light source 112.The light of second group of light source 112 again by transmittance section 121 penetrates lighting device 1 after leaded light by light guide section 120 on a first direction.The some light of first group of light source 111 penetrates lighting device 1 by final after the cavity 123 of light guide section 120 from transmittance section 121, another part light of first group of light source 111 penetrates lighting device 1 by light guide section 120 in a second direction, forms angle between second direction and first direction.In the present embodiment, first direction is vertical direction, and the angle between second direction and first direction is greater than zero degree and is less than 180 degree, and namely first group of light source 111 has at least a part of light to penetrate lighting device 1 by light guide section 120 on the direction of non-vertical.Lighting device 1 of the present invention has at least two group light sources makes these two groups of light sources form different optical effects at the end face of optical element 12 and side by optical element 12, thus make the optical effect of lighting device 1 can variation, attractive in appearance, and structure is simple, to manufacture, easy for installation.Such as, second group of light source 112 can be set to color light source etc.
Optical element 12 is made up of transparent material, and the face of local can be had to be frosting or to have diffuse reflector, and making optical element 12 overall sparkling and crystal-clear penetrating, is externally the overall transparent body.
In the present embodiment, first direction is vertical direction, and second direction is horizontal direction, and first direction is perpendicular to second direction.In other embodiments, first direction can be also other angles with second direction.
The light guide section 120 of optical element 12 is externally cylindrical, has at least one cross section for annular.In the present embodiment, light guide section 120 cross section is in a second direction annular, and the light of first group of light source 111 is through annular sidewall injection light guide section 120.In other embodiments, light guide section 120 also can be designed to other column structures or irregular shape as required.
Transmittance section 121 is cylindrical, and the maximum gauge of transmittance section 121 is greater than the maximum gauge of light guide section 120, and transmittance section 121 height is in a first direction less than light guide section 120 height in a first direction.The opposing bottom surface in transmittance section 121 of light guide section 120 has some fins (not shown), and fin is uniformly distributed in the bottom surface of light guide section 120.Fin can make lighting device 1 viewed from direction, transmittance section 121 have the effect of shadow of rib one rib, in other embodiments, also can not arrange fin as required.
Light guide section 120 in a first direction lengthwise extends, and transmittance section 121 extends at second direction lengthwise, and transmittance section 121 width is in a second direction wider than width in a first direction, and light guide section 120 width is in a first direction wider than width in a second direction.In the present embodiment, light guide section 120 and the transmittance section 121 of optical element 12 are one-body molded, and transmittance section is extended from described light guide section, and externally, optical element 12 is rivet shape, makes optical element 12 handsome in appearance.
First group of light source 111 and second group of light 112 source of LED light source 11 are positioned at same plane.First group of light source 111 and second group of light source 112 are arranged at same plane, make first group of light source 111 and second group of light source 112 can be incorporated on same light source plate, convenient manufacture, installation.In other embodiments, even if first group of light source 111 and second group of light source 112 also can be arranged at Different Plane or be positioned at same plane, also can be positioned on different light source boards.
Lighting device 1 also comprises housing 13, and housing 13 has host cavity 131, and LED light source 11 is arranged in the host cavity 131 of housing 13 thus is fixed on housing 13, and optical element 12 is connected with housing 13 thus is assembled into one with housing 13.In the present embodiment, LED light source 11 is fixed on bottom housing 13.
Lighting device 1 also comprises the diffusion layer 14 of annular, and diffusion layer 14, between second group of light source 112 and light guide section 12, plays diffusion to the light of second group of light source 112.The dazzle that diffusion layer 14 can prevent second group of light source 112 from producing and granular sensation.In the present embodiment, diffusion layer 14 is for being arranged in the diffuser plate of the host cavity 131 of housing 13, and diffuser plate is fixed in housing 13.In other embodiments, diffusion layer 14 also can be the frosting of optical element 12, or the diffuse-reflective material layer of direct spraying on optical element 12 or be made up of diffusion film.Diffuser plate in the present embodiment, more convenient installation, and certain supporting role can be played to optical element 12.
Lighting device 1 also comprises support component 15, support component 15 to be fixed in the host cavity 131 of housing 13 and to be positioned at the top of the light source board of LED light source, there is the reflecting part 151 of a hollow, the sidewall of reflecting part 151 surrounds closed annular, thus form cavity 152, first group of light source 111 is positioned at the inner side of reflecting part 151, and second group of light source 112 is positioned at the outside of reflecting part 151.In the present embodiment, reflecting part 151 is the cylindrical of hollow, and its outer wall has the support portion 153 of step, and the inside of housing 13 sidewall has step-like supporting walls (not shown), and support portion 153 and supporting walls position correspondence, common support fixes diffusion layer 14.It is more firm that the arranging of the supporting walls of housing 13 can make diffusion layer 14 fixing, in other embodiments, can not arrange supporting walls as required, or fix diffusion layer 14 by other means.Further, when diffusion layer 14 be direct spraying on optical element 12 time, also support portion 153 and supporting walls can not be set.In the present embodiment, the lower end of light guide section 120, between reflecting part 151 and housing 13, also can change the fixed position of light guide section 120 and light guide section 120 lower end, position relationship between reflecting part 151 and housing 13 as required in other embodiments.
Support component 15 also comprises the base 154 with opening 155, and base 154 is connected with reflecting part 151.Base 154 is for better fixed support element 15.Opening 155 at least comprises the first opening 1550, the first group of light source 111 being positioned at reflecting part 151 middle inside and is positioned at the first opening 1550 place, and the some light of first group of light source 111 reflects rear directive optical element 12 by reflecting part 151.In the present embodiment, base 154 is annular, the maximum gauge of base 154 is greater than the maximum gauge of reflecting part 151, comprise the Part I 1540 being positioned at reflecting part 151 inside and be positioned at Part I 1540 with Part II 1542, first opening 1550 being positioned at reflecting part 151 outside.The inwall of Part I 1540 and reflecting part 151 forms the first reflection cavity 20, and the cavity 123 of optical element 12 is connected with the first reflection cavity 20, and the some light of first group of light source 11 is by directive optical element 12 after the reflection of the first reflection cavity 20.
Part II 1542 also comprises some second openings 1552, second group of light source 112 is corresponding with the second opening 1552, and be arranged in the second opening 1552 one to one, the outer wall of Part II 1542, reflecting part 151 and housing 13 form the second reflection cavity 21, light guide section 120 or diffusion layer 14 are connected with the second reflection cavity 21, in the present embodiment, diffusion layer 14 is connected with the second reflection cavity 21, and the some light of second group of light source 112 is through the reflection mixed light of the second reflection cavity 21 and directive diffusion layer 14.When first group of light source 111 and second group of light source 112 are positioned at same light source plate 113, base 154 is close to light source board 113 thus better fixed support element 15.
Lighting device 1 also comprises diffusion part 16, the light that diffusion part 16 is arranged in the cavity 123 of light guide section 120 or cavity 152, first group of light source 111 of support member 15 directive transmittance section 121 again after being processed by diffusion part 16.In the present embodiment, diffusion part 16 is arranged in cavity 123, the some light of first group of light source 111 can be transmitted from light guide section 120 on the one hand before diffusion, and another part light directive transmittance section 121 again after diffusion part 16, thus both met the penetrating sense of lighting device 1 entirety, when making again lighting device 1 viewed from side, transmittance section 121, do not have dazzle.
In the present embodiment, diffusion part 16 is shaping separately and be fixed on transmittance section 121.In the present embodiment, diffusion part 16 sticks in transmittance section 121, and in other embodiments, diffusion part 16 also can be fixed on transmittance section 121 by additive method.Diffusion part 16 in dish, comprise circular pedestal 161 and extend from pedestal 161, diameter expands and smooth extension 162 gradually, diffusion part 16 has some fins 163 to produce special light efficiency towards the surface of transmittance section 121.Fin 163 is curved.In other embodiments, diffusion part 16 also can be one-body molded with transmittance section 121, or directly frosting is made in the side in the face of cavity 123 of transmittance section 121, or direct spraying diffuse-reflective material is on transmittance section 121, and fin 163 also can be set to other shapes or not arrange.
Diffusion part 16 also comprises becket (not shown) to produce special light efficiency, and becket between diffusion part 16 and transmittance section 121, and is positioned at the junction of pedestal 161 and extension 162.In other embodiments, can diffusion part becket be set as required or the element that other produce special light efficiency is set.
Lighting device 1 also comprises diffusion film 17, and diffusion film 17 is rectangular, is attached at the inner side of the sidewall of light guide section 120.In other embodiments, also directly the inner side of light guide section 120 sidewall can be made frosting or spraying one deck diffuse-reflective material.
Should be noted that, embodiments of the invention have preferably implementation, and not any type of restriction is done to the present invention, any person skilled in art of being familiar with may utilize the technology contents of above-mentioned announcement change or be modified to equivalent effective embodiment, in every case the content of technical solution of the present invention is not departed from, the any amendment done above embodiment according to technical spirit of the present invention or equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (20)
1. a lighting device, comprise LED light source, and the light that LED light source sends is carried out to the optical element of optical treatment, first group of light source that described LED light source comprises the center of being distributed in and the second group of light source be positioned at around first group of light source, the transmittance section that described optical element comprises hollow light guide section and is connected with described light guide section, the middle part of described light guide section forms cavity, described light guide section is positioned at the top of described second group of light source, the light of second group of light source again by described transmittance section penetrates described lighting device after leaded light by described light guide section on a first direction, the some light of described first group of light source is by finally penetrating described lighting device from described transmittance section after the cavity of described light guide section, another part light of described first group of light source penetrates described lighting device by described light guide section in a second direction, angle is formed between described second direction and described first direction.
2. lighting device as claimed in claim 1, it is characterized in that: described light guide section in a first direction lengthwise extends, described transmittance section extends at second direction lengthwise, described transmittance section width is in a second direction wider than width in a first direction, and described light guide section width is in a first direction wider than width in a second direction.
3. lighting device as claimed in claim 1, is characterized in that: light guide section and the transmittance section of described optical element are one-body molded, and described transmittance section is extended from described light guide section.
4. lighting device as claimed in claim 1, is characterized in that: the light guide section of described optical element, externally for cylindrical, has at least one cross section for annular.
5. lighting device as claimed in claim 1, is characterized in that: first group of light source and second group of light source of described LED light source are positioned at same plane.
6. lighting device as claimed in claim 1, it is characterized in that: described lighting device also comprises housing, described housing has host cavity, and described LED light source is arranged in the host cavity of described housing thus is fixed on described housing, and described optical element is connected with described housing.
7. lighting device as claimed in claim 6, is characterized in that: described lighting device also comprises the diffusion layer of annular, and described diffusion layer, between described second group of light source and described light guide section, plays diffusion to the light of second group of light source.
8. lighting device as claimed in claim 7, it is characterized in that: described lighting device also comprises support component, described housing and described support component form the first reflection cavity and the second reflection cavity, described cavity connects described first reflection cavity, and described light guide section or described diffusion layer connect described second reflection cavity.
9. as the lighting device in claim 7 or 8 as described in any one, it is characterized in that: described diffusion layer is the diffuser plate of the host cavity being arranged in described housing, be positioned at the light inlet of described light guide section.
10. lighting device as claimed in claim 9, it is characterized in that: described lighting device also comprises support component, described support component is fixed on the bottom of the host cavity of described housing, there is the reflecting part of a hollow, the sidewall of described reflecting part surrounds closed annular, thus forming a cavity, described first group of light source is positioned at the inner side of described reflecting part, and described second group of light source is positioned at the outside of described reflecting part.
11. lighting devices as claimed in claim 10, it is characterized in that: described reflecting part is the cylindrical of hollow, its outer wall has the support portion of step, the inside of described housing sidewall has step-like supporting walls, described support portion and supporting walls position correspondence, common support fixes described diffusion layer.
12. lighting devices as claimed in claim 11, it is characterized in that: described support component also comprises the base with opening, described base is connected with described reflecting part, and described opening at least comprises the first opening be positioned at inside described reflecting part, and described first group of light source is positioned at described first opening part.
13. lighting devices as claimed in claim 12, it is characterized in that: described base is annular, the maximum gauge of described bottom is greater than the maximum gauge of described reflecting part, comprise the Part I being positioned at described reflecting part inside and the Part II being positioned at described reflecting part outside, described first opening is positioned at described Part I, the inwall of described Part I and reflecting part forms the first reflection cavity, and the some light of described first group of light source is by optical element described in directive after the reflection of described first reflection cavity.
14. lighting devices as claimed in claim 12, it is characterized in that: described Part II also comprises some second openings, described second group of light source is corresponding with described second opening, and be positioned at described second opening one to one, outer wall and the described housing of described Part II, reflecting part form the second reflection cavity, and the some light of second group of light source is through diffusion layer described in the reflection mixed light of described second reflection cavity and directive.
15. lighting devices as claimed in claim 1, it is characterized in that: described lighting device also comprises diffusion part, described diffusion part is arranged in the cavity of described light guide section or the cavity of described support member, and the light of described first group of light source is by transmittance section described in directive again after described diffusion part process.
16. lighting devices as claimed in claim 15, is characterized in that: the described diffusion part being positioned at described cavity is shaping separately and be fixed on described transmittance section, or one-body molded with described transmittance section, or are formed on described transmittance section after described transmittance section is shaping again.
17. lighting devices as claimed in claim 15, it is characterized in that: described diffusion part is in dish, comprise circular pedestal and extend from described pedestal, diameter expands and smooth extension gradually, described diffusion part has some fins towards the surface of described transmittance section.
18. lighting devices as claimed in claim 17, is characterized in that: described fin is curved.
19. lighting devices as claimed in claim 15, it is characterized in that: described diffusion part also comprises becket, described becket between described diffusion part and described transmittance section, and is positioned at the junction of described pedestal and extension.
20. lighting devices as claimed in claim 1, it is characterized in that: described transmittance section is cylindrical, the maximum gauge of described transmittance section is greater than the maximum gauge of described light guide section, and described transmittance section height is in a first direction less than described light guide section height in a first direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769108.7A CN104482437B (en) | 2014-12-12 | 2014-12-12 | A kind of illuminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410769108.7A CN104482437B (en) | 2014-12-12 | 2014-12-12 | A kind of illuminator |
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| CN104482437A true CN104482437A (en) | 2015-04-01 |
| CN104482437B CN104482437B (en) | 2016-08-24 |
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| CN110145722A (en) * | 2019-05-14 | 2019-08-20 | 德清阳瑞光学科技有限公司 | Optical instrument dust cover |
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| CN203979942U (en) * | 2014-06-30 | 2014-12-03 | 欧普照明股份有限公司 | A kind of light fixture |
| CN204268166U (en) * | 2014-12-12 | 2015-04-15 | 欧普照明股份有限公司 | A kind of lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108957621A (en) * | 2018-09-12 | 2018-12-07 | 东莞通华液晶有限公司 | A kind of annular light guide plate and automobile instrument mould group |
| CN110145722A (en) * | 2019-05-14 | 2019-08-20 | 德清阳瑞光学科技有限公司 | Optical instrument dust cover |
| CN110145722B (en) * | 2019-05-14 | 2024-04-09 | 德清阳瑞光学科技有限公司 | Dust cover for optical instrument |
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