US20200240617A1 - Edge-lit Downlight Apparatus - Google Patents
Edge-lit Downlight Apparatus Download PDFInfo
- Publication number
- US20200240617A1 US20200240617A1 US16/439,703 US201916439703A US2020240617A1 US 20200240617 A1 US20200240617 A1 US 20200240617A1 US 201916439703 A US201916439703 A US 201916439703A US 2020240617 A1 US2020240617 A1 US 2020240617A1
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- US
- United States
- Prior art keywords
- lit
- edge
- downlight apparatus
- laminate
- protrusion
- 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.)
- Granted
Links
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 239000006260 foam Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 229920002799 BoPET Polymers 0.000 claims description 6
- 239000005041 Mylar™ Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004512 die casting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
-
- 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
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
- F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- 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
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/005—Sealing arrangements therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
- F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2105/00—Planar light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0085—Means for removing heat created by the light source from the package
Definitions
- the present invention is related to a downlight apparatus, and more particularly related to an edge-lit downlight apparatus.
- a conventional edge-lit downlight apparatus generally has the following drawbacks:
- the edge-lit downlight apparatus is mounted on the ceiling via a bracket and screws.
- Such installation method is inefficient and requires more installation time, which leads to higher installation cost.
- the downlight apparatus is usually not waterproof or the waterproof level is not high, which limits the scope of use. Also, there may be safety concerns in some applications.
- the present disclosure provides an edge-lit downlight apparatus configured with a reasonable structure, good heat dissipation effect and good light-emitting effect.
- the edge-lit downlight apparatus includes a surface housing having a base and a side wall, a laminate, and a light guide module located between the surface housing and the laminate.
- the edge-lit downlight apparatus further includes a circuit board located in a space formed by the surface housing, the light guide module and the laminate.
- the circuit board has an inner surface wall and an outer surface wall.
- the edge-lit downlight apparatus includes at least two first brackets, and each of the first brackets includes a body and a contacting part. For each of the first brackets, the body of the first bracket abuts against the side wall of the surface housing, and the contacting part of the first bracket extends outward from the body and abuts against the laminate.
- the edge-lit downlight apparatus includes a plurality of fasteners pass through the contacting parts of the first brackets, the laminate, and are removably connected to the surface housing.
- the outer surface wall of the circuit board contacts the side wall of the surface housing via a heat dissipation material, and there are a plurality of LED chips located on the inner surface wall of the circuit board.
- the circuit board may be ring-shaped or square-shaped.
- the circuit board may be flexible, and may be an aluminum-based printed circuit board.
- the surface housing may be made of plastic.
- the light guide module may include a diffuser, a light guide plate, a light reflector, and a foam layer.
- the surface housing may have a first protrusion, which is ring-shaped and coaxial with the surface housing.
- the laminate may abut against the first protrusion, and have a recess around the center of the laminate.
- the edge-lit downlight apparatus may further include a mylar film and a water-proof foam arranged between the second protrusion and the side wall of the surface housing.
- the first protrusion may have a top wall having a second protrusion, and the second protrusion is ring-shaped and coaxial with the surface housing.
- the edge-lit downlight apparatus may further include a back housing and at least two second brackets.
- Each of the second brackets includes a first part, a second part, and a third part. The first part is connected to the laminate, the second part abuts against the second protrusion, and the third part extends toward a center of the surface housing.
- the at least two first brackets may be L-shaped.
- the edge-lit downlight apparatus may further include a driving module located on the laminate.
- the laminate may have a first side facing a forward direction and a second side facing opposite to the forward direction, and the driving module is located on the second side of the laminate.
- the surface housing has a first protrusion, and the first protrusion is ring-shaped and coaxial with the surface housing.
- the laminate may abut against the first protrusion.
- the first protrusion may have a top wall having a second protrusion, which is ring-shaped and coaxial with the surface housing.
- the circuit board provided with the light module and the surface housing are adhered by heat dissipation material (e.g., heat dissipation tape or heat dissipation gel) so as to enhance the heat dissipation performance.
- heat dissipation material e.g., heat dissipation tape or heat dissipation gel
- the first brackets engage with the fasteners to increase the contact area, so that the positioning between the components may be more precise and firmer. In this way, the misalignment or gap of the optical components due to assembly issues may be avoided. It can be understood that such misalignment or gap may cause water ripple, which results in poor light-emitting effect. With the configuration proposed by the present disclosure, the optical efficiency and light quality may be greatly enhanced.
- FIG. 1 is a schematic view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure.
- FIG. 2 is a schematic view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure, where the back plate is removed.
- FIG. 3 is an enlarged view of the portion indicated by “A” in FIG. 2 .
- FIG. 4 is an exploded view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure.
- FIG. 5 is a cross sectional view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure.
- FIG. 6 is a schematic view of the edge-lit downlight apparatus in accordance with the second embodiment of the present disclosure.
- FIG. 7 is another perspective view of the edge-lit downlight apparatus in accordance with the second embodiment of the present disclosure.
- the present disclosure relates to the edge-lit downlight apparatus having good heat dissipation effect. Meanwhile, the first bracket and the fasteners are configured to improve the pressing effect of the laminate to the optical components, so the light-emitting effect may be enhanced.
- the edge-lit downlight apparatus includes a surface housing 10 having a base and a side wall, a laminate 20 , and a light guide module 30 located between the surface housing 10 and the laminate 20 .
- the surface housing 10 may be ring-shaped, and includes an L-shaped cross-section. A base of the surface housing 10 extends toward a central axis of the surface housing 10 to support other components of the edge-lit downlight apparatus.
- the edge-lit downlight apparatus further includes a circuit board 50 located in a space formed by the surface housing 10 , the light guide module 30 and the laminate 20 .
- the circuit board has an inner surface wall and an outer surface wall.
- the edge-lit downlight apparatus includes at least two first brackets 60 .
- the first brackets 11 are L-shaped, and each of the first brackets 60 includes a body and a contacting part.
- the first brackets 60 are symmetrical with respect to the central axis of the surface housing 10 .
- the body of the first bracket 60 abuts against the side wall of the surface housing 10 , and the contacting part of the first bracket 60 extends outward from the body and abuts against the laminate 20 .
- the edge-lit downlight apparatus also includes a plurality of fasteners 40 pass through the contacting parts of the first brackets 60 , the laminate 20 , and are removably connected to the surface housing 10 .
- the outer surface wall of the circuit board 50 contacts the side wall of the surface housing 10 via a heat dissipation material.
- the heat dissipation material may be a heat dissipation tape or heat dissipation gel.
- the circuit board 50 is ring-shaped.
- a light module 51 including a plurality of LED chips is located on the inner surface wall of the circuit board 50 to emit light toward the light guide plate 32 .
- the circuit board 50 may be aluminum-based, and may be an aluminum-based printed circuit board.
- the surface ring 10 may be made by plastic material. The circuit board 50 and the surface ring 10 could work together to provide good heat dissipation effect.
- the light guide module 30 includes a diffuser 31 , a light guide plate 32 , a light reflector 33 , and a foam layer 34 .
- the surface housing 10 has a first protrusion 11 , which is ring-shaped and coaxial with the surface housing 10 .
- the laminate 20 abuts against the first protrusion 11 of the surface housing 10 .
- the laminate 20 has a recess 21 around the center of the laminate 20 , and the recess 21 abuts against the foam layer 34 .
- the laminate 20 engages with the first protrusion 11 to provide better waterproof performance.
- the first protrusion 11 has a top wall having a second protrusion 12
- the second protrusion 12 is also ring-shaped and coaxial with the surface housing 10 .
- the edge-lit downlight apparatus further includes a mylar film 70 and a water-proof foam 71 arranged between the second protrusion 12 and the side wall of the surface housing 10 .
- One end of the water-proof foam 71 protrudes from the surface housing 10 in an axial direction of the surface housing 10 .
- the edge of the laminate 20 abuts against a sidewall of the second protrusion 12 .
- the body abuts against an inner sidewall of the second protrusion 12 .
- the water-proof foam 71 and the mylar film 70 are configured to enhance the waterproof level such that the edge-lit downlight apparatus may be adopted safely in a variety of applications.
- the edge-lit downlight apparatus include a back housing 80 and at least two second brackets 61 .
- Each of the second brackets 61 includes a first part, a second part, and a third part.
- the first part is connected to the laminate 20 , the second part abuts against the second protrusion 12 , and the third part extends toward a center of the surface housing 10 .
- the fasteners 40 may pass through a first part and the laminate 20 in sequence. And the fasteners 40 may be connected to or detached from the first protrusion 11 , such that the second brackets 61 may also press against the fasteners 40 . As an example, the fasteners 40 may be screws.
- the second protrusion 12 is configured with a plurality of openings such that the base and the first part may pass through.
- the openings extend toward a top of the second protrusion 12 in the axial direction.
- the first brackets 60 is L-shaped facing toward an external side of the surface housing 10
- the second brackets 61 is Z-shaped.
- the back housing 80 includes a bottom wall and a ring-shaped sidewall.
- the back housing 80 covers the surface housing 10 , and the opening of the back housing 80 faces toward the surface housing 10 .
- the laminate 20 and the light guide module 30 are respectively configured between the back housing 80 and the surface housing 10 .
- the sidewall of the back housing 80 is configured with at least two L-shaped notches 81 .
- One end of the notch 81 extends toward one end of the sidewall facing away the bottom wall in an axial direction of the back housing 80 .
- the at least two notches 81 respectively corresponds to the at least two second brackets 61 .
- the third part extends into the corresponding notch 81 and is movably disposed along the notch 81 .
- the bottom wall of the back housing 80 could fixed onto the ceiling.
- the surface housing 10 may be mounted by screwing in, pushing in, etc., so that the third part of the second bracket 61 is engaged with the notch 81 , and the installation and disassembly of the downlight apparatus can be quickly accomplished.
- the edge-lit downlight apparatus further includes a driving module 90 located on the laminate 20 .
- the laminate 20 has a first side facing a forward direction 100 and a second side facing opposite to the forward direction 100 , and the driving module 90 is located on the second side of the laminate 20 .
- FIG. 6 and FIG. 7 illustrate the second embodiment of the present disclose.
- the difference between the first embodiment and the second embodiment resides in that: in the second embodiment, the surface housing 10 is of a square structure. It can be understood that the structure of the surface housing 10 may also be in other shape.
- the present disclosure discloses an edge-lit downlight apparatus configured with good structure, good heat dissipation, and good light-emitting effect.
- the edge-lit downlight apparatus is provided with the circuit board having the light module adhering to the surface housing via heat dissipation material.
- the circuit board may be flexible aluminum-based printed circuit board, and the surface housing may be made by plastic materials.
- the heat generated by the LED chips may be efficiently dissipated by the flexible aluminum-based printed circuit board and the surface housing, so as to extend the life cycle of the edge-lit downlight apparatus.
- the L-shaped first brackets engage with the fasteners to increase the dimension of the contact areas, so that the positioning between the components may be more precise and firmer.
- the water-proof foam and the mylar film are configured to enhance the waterproof level such that the edge-lit downlight apparatus may be safely adopted in a variety of applications.
- the back housing may be fixed onto the ceiling. Alternatively, the back housing may also be assembled on the pre-fabricated fixed structure, and then the body of the downlight apparatus may be screwed in, pushed in, etc., which is quick and convenient.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
- The present invention is related to a downlight apparatus, and more particularly related to an edge-lit downlight apparatus.
- A conventional edge-lit downlight apparatus generally has the following drawbacks:
- 1) Generally the surface ring of a traditional edge-lit downlight apparatus is manufactured by the die-casting process so as to ensure it passes the Temperature Rise Test. However, the die-casting process is complex, time-consuming, and costly.
- 2) For a traditional edge-lit downlight apparatus, only screws are used to press the laminate against the optical components. The performance of light emission is not satisfactory.
- 3) Conventionally, the edge-lit downlight apparatus is mounted on the ceiling via a bracket and screws. Such installation method is inefficient and requires more installation time, which leads to higher installation cost.
- 4) The downlight apparatus is usually not waterproof or the waterproof level is not high, which limits the scope of use. Also, there may be safety concerns in some applications.
- The present disclosure provides an edge-lit downlight apparatus configured with a reasonable structure, good heat dissipation effect and good light-emitting effect.
- In one embodiment, the edge-lit downlight apparatus includes a surface housing having a base and a side wall, a laminate, and a light guide module located between the surface housing and the laminate. The edge-lit downlight apparatus further includes a circuit board located in a space formed by the surface housing, the light guide module and the laminate. The circuit board has an inner surface wall and an outer surface wall. The edge-lit downlight apparatus includes at least two first brackets, and each of the first brackets includes a body and a contacting part. For each of the first brackets, the body of the first bracket abuts against the side wall of the surface housing, and the contacting part of the first bracket extends outward from the body and abuts against the laminate. The edge-lit downlight apparatus includes a plurality of fasteners pass through the contacting parts of the first brackets, the laminate, and are removably connected to the surface housing. The outer surface wall of the circuit board contacts the side wall of the surface housing via a heat dissipation material, and there are a plurality of LED chips located on the inner surface wall of the circuit board.
- The circuit board may be ring-shaped or square-shaped. The circuit board may be flexible, and may be an aluminum-based printed circuit board.
- The surface housing may be made of plastic. The light guide module may include a diffuser, a light guide plate, a light reflector, and a foam layer. The surface housing may have a first protrusion, which is ring-shaped and coaxial with the surface housing. The laminate may abut against the first protrusion, and have a recess around the center of the laminate.
- The edge-lit downlight apparatus may further include a mylar film and a water-proof foam arranged between the second protrusion and the side wall of the surface housing.
- The first protrusion may have a top wall having a second protrusion, and the second protrusion is ring-shaped and coaxial with the surface housing.
- In some embodiments, the edge-lit downlight apparatus may further include a back housing and at least two second brackets. Each of the second brackets includes a first part, a second part, and a third part. The first part is connected to the laminate, the second part abuts against the second protrusion, and the third part extends toward a center of the surface housing.
- The at least two first brackets may be L-shaped.
- In some embodiments, the edge-lit downlight apparatus may further include a driving module located on the laminate.
- The laminate may have a first side facing a forward direction and a second side facing opposite to the forward direction, and the driving module is located on the second side of the laminate.
- In some embodiments, the surface housing has a first protrusion, and the first protrusion is ring-shaped and coaxial with the surface housing.
- The laminate may abut against the first protrusion. The first protrusion may have a top wall having a second protrusion, which is ring-shaped and coaxial with the surface housing.
- The advantages of the present disclosure include at least the following:
- (1) The circuit board provided with the light module and the surface housing are adhered by heat dissipation material (e.g., heat dissipation tape or heat dissipation gel) so as to enhance the heat dissipation performance.
- (2) The first brackets engage with the fasteners to increase the contact area, so that the positioning between the components may be more precise and firmer. In this way, the misalignment or gap of the optical components due to assembly issues may be avoided. It can be understood that such misalignment or gap may cause water ripple, which results in poor light-emitting effect. With the configuration proposed by the present disclosure, the optical efficiency and light quality may be greatly enhanced.
-
FIG. 1 is a schematic view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure. -
FIG. 2 is a schematic view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure, where the back plate is removed. -
FIG. 3 is an enlarged view of the portion indicated by “A” inFIG. 2 . -
FIG. 4 is an exploded view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure. -
FIG. 5 is a cross sectional view of the edge-lit downlight apparatus in accordance with the first embodiment of the present disclosure. -
FIG. 6 is a schematic view of the edge-lit downlight apparatus in accordance with the second embodiment of the present disclosure. -
FIG. 7 is another perspective view of the edge-lit downlight apparatus in accordance with the second embodiment of the present disclosure. - To make the objectives, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawings and the following embodiments, some embodiments are described in further detail. It is to be understood that the description is not to be considered as limiting the scope of the present invention.
- The present disclosure relates to the edge-lit downlight apparatus having good heat dissipation effect. Meanwhile, the first bracket and the fasteners are configured to improve the pressing effect of the laminate to the optical components, so the light-emitting effect may be enhanced.
- Refer to
FIGS. 1-5 . In a first embodiment, the edge-lit downlight apparatus includes asurface housing 10 having a base and a side wall, alaminate 20, and alight guide module 30 located between thesurface housing 10 and thelaminate 20. - The
surface housing 10 may be ring-shaped, and includes an L-shaped cross-section. A base of thesurface housing 10 extends toward a central axis of thesurface housing 10 to support other components of the edge-lit downlight apparatus. - The edge-lit downlight apparatus further includes a
circuit board 50 located in a space formed by thesurface housing 10, thelight guide module 30 and thelaminate 20. The circuit board has an inner surface wall and an outer surface wall. The edge-lit downlight apparatus includes at least twofirst brackets 60. In this embodiment, thefirst brackets 11 are L-shaped, and each of thefirst brackets 60 includes a body and a contacting part. - The
first brackets 60 are symmetrical with respect to the central axis of thesurface housing 10. For each of thefirst brackets 60, the body of thefirst bracket 60 abuts against the side wall of thesurface housing 10, and the contacting part of thefirst bracket 60 extends outward from the body and abuts against thelaminate 20. - The edge-lit downlight apparatus also includes a plurality of
fasteners 40 pass through the contacting parts of thefirst brackets 60, the laminate 20, and are removably connected to thesurface housing 10. The outer surface wall of thecircuit board 50 contacts the side wall of thesurface housing 10 via a heat dissipation material. The heat dissipation material may be a heat dissipation tape or heat dissipation gel. In this embodiment, thecircuit board 50 is ring-shaped. Alight module 51 including a plurality of LED chips is located on the inner surface wall of thecircuit board 50 to emit light toward thelight guide plate 32. - The
circuit board 50 may be aluminum-based, and may be an aluminum-based printed circuit board. Thesurface ring 10 may be made by plastic material. Thecircuit board 50 and thesurface ring 10 could work together to provide good heat dissipation effect. - Refer to
FIG. 4 . Thelight guide module 30 includes adiffuser 31, alight guide plate 32, alight reflector 33, and afoam layer 34. - Refer to
FIGS. 2, 4 and 5 . Thesurface housing 10 has afirst protrusion 11, which is ring-shaped and coaxial with thesurface housing 10. The laminate 20 abuts against thefirst protrusion 11 of thesurface housing 10. The laminate 20 has arecess 21 around the center of the laminate 20, and therecess 21 abuts against thefoam layer 34. The laminate 20 engages with thefirst protrusion 11 to provide better waterproof performance. - Refer to
FIG. 3 andFIG. 5 . Thefirst protrusion 11 has a top wall having asecond protrusion 12, and thesecond protrusion 12 is also ring-shaped and coaxial with thesurface housing 10. - Refer to
FIG. 4 andFIG. 5 . The edge-lit downlight apparatus further includes amylar film 70 and a water-proof foam 71 arranged between thesecond protrusion 12 and the side wall of thesurface housing 10. - One end of the water-
proof foam 71 protrudes from thesurface housing 10 in an axial direction of thesurface housing 10. The edge of the laminate 20 abuts against a sidewall of thesecond protrusion 12. The body abuts against an inner sidewall of thesecond protrusion 12. - In view of the above descriptions, the water-
proof foam 71 and themylar film 70 are configured to enhance the waterproof level such that the edge-lit downlight apparatus may be adopted safely in a variety of applications. - Refer to
FIGS. 2 and 4 . The edge-lit downlight apparatus include aback housing 80 and at least twosecond brackets 61. Each of thesecond brackets 61 includes a first part, a second part, and a third part. The first part is connected to the laminate 20, the second part abuts against thesecond protrusion 12, and the third part extends toward a center of thesurface housing 10. - In the embodiment, the
fasteners 40 may pass through a first part and the laminate 20 in sequence. And thefasteners 40 may be connected to or detached from thefirst protrusion 11, such that thesecond brackets 61 may also press against thefasteners 40. As an example, thefasteners 40 may be screws. - In order to conveniently take out the
first brackets 60 and thesecond brackets 61, thesecond protrusion 12 is configured with a plurality of openings such that the base and the first part may pass through. The openings extend toward a top of thesecond protrusion 12 in the axial direction. In this way, thefirst brackets 60 is L-shaped facing toward an external side of thesurface housing 10, and thesecond brackets 61 is Z-shaped. - The
back housing 80 includes a bottom wall and a ring-shaped sidewall. Theback housing 80 covers thesurface housing 10, and the opening of theback housing 80 faces toward thesurface housing 10. The laminate 20 and thelight guide module 30 are respectively configured between theback housing 80 and thesurface housing 10. The sidewall of theback housing 80 is configured with at least two L-shapednotches 81. One end of thenotch 81 extends toward one end of the sidewall facing away the bottom wall in an axial direction of theback housing 80. The at least twonotches 81 respectively corresponds to the at least twosecond brackets 61. The third part extends into the correspondingnotch 81 and is movably disposed along thenotch 81. - In view of the above, the bottom wall of the
back housing 80 could fixed onto the ceiling. Thesurface housing 10 may be mounted by screwing in, pushing in, etc., so that the third part of thesecond bracket 61 is engaged with thenotch 81, and the installation and disassembly of the downlight apparatus can be quickly accomplished. - Refer to
FIG. 2 andFIG. 4 . The edge-lit downlight apparatus further includes a drivingmodule 90 located on thelaminate 20. Particularly, the laminate 20 has a first side facing a forward direction 100 and a second side facing opposite to the forward direction 100, and the drivingmodule 90 is located on the second side of the laminate 20. -
FIG. 6 andFIG. 7 illustrate the second embodiment of the present disclose. The difference between the first embodiment and the second embodiment resides in that: in the second embodiment, thesurface housing 10 is of a square structure. It can be understood that the structure of thesurface housing 10 may also be in other shape. - In view of the above, the present disclosure discloses an edge-lit downlight apparatus configured with good structure, good heat dissipation, and good light-emitting effect. The edge-lit downlight apparatus is provided with the circuit board having the light module adhering to the surface housing via heat dissipation material. The circuit board may be flexible aluminum-based printed circuit board, and the surface housing may be made by plastic materials. The heat generated by the LED chips may be efficiently dissipated by the flexible aluminum-based printed circuit board and the surface housing, so as to extend the life cycle of the edge-lit downlight apparatus. The L-shaped first brackets engage with the fasteners to increase the dimension of the contact areas, so that the positioning between the components may be more precise and firmer. In this way, the misalignment or gap of the optical components due to assembly problems may be avoided. It can be understood that such misalignment or gap may cause water ripple, which results in poor light-emitting effect. With such configuration, the optical efficiency and light quality may be greatly enhanced. The water-proof foam and the mylar film are configured to enhance the waterproof level such that the edge-lit downlight apparatus may be safely adopted in a variety of applications. The back housing may be fixed onto the ceiling. Alternatively, the back housing may also be assembled on the pre-fabricated fixed structure, and then the body of the downlight apparatus may be screwed in, pushed in, etc., which is quick and convenient.
- The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the techniques and their practical applications. Others skilled in the art are thereby enabled to best utilize the techniques and various embodiments with various modifications as are suited to the particular use contemplated.
- Although the disclosure and examples have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the disclosure and examples as defined by the claims.
Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201920162060.1U CN209431246U (en) | 2019-01-30 | 2019-01-30 | A kind of ceiling lamp that side is luminous |
CN201920162060.1 | 2019-01-30 | ||
CN201920162060U | 2019-01-30 |
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US10724711B1 US10724711B1 (en) | 2020-07-28 |
US20200240617A1 true US20200240617A1 (en) | 2020-07-30 |
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Application Number | Title | Priority Date | Filing Date |
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US16/439,703 Active US10724711B1 (en) | 2019-01-30 | 2019-06-13 | Edge-lit downlight apparatus |
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CN (1) | CN209431246U (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US9188318B2 (en) * | 2012-09-12 | 2015-11-17 | Cooper Technologies Company | Light-emitting diode wave guide down light retrofit fixtures |
US9541270B2 (en) * | 2014-07-18 | 2017-01-10 | ETi Solid State Lighting Inc. | Integral LED light fixture |
US9921364B2 (en) * | 2015-01-03 | 2018-03-20 | CP IP Holdings Limited | Lighting arrangement |
US10209428B2 (en) * | 2014-12-26 | 2019-02-19 | Sharp Kabushiki Kaisha | Lighting device and display device |
WO2017206164A1 (en) * | 2016-06-03 | 2017-12-07 | 东莞励国照明有限公司 | Ceiling lamp provided with light guide plate, and mounting method therefor |
US10139085B2 (en) * | 2017-02-06 | 2018-11-27 | Habitex Corporation | Lamp device with lampshade fastened via arm latch |
EP3369985B1 (en) * | 2017-03-02 | 2020-06-10 | Signify Holding B.V. | Luminaire with light guide |
US10619808B2 (en) * | 2017-10-18 | 2020-04-14 | Good Earth Lighting, Inc. | Flat panel ceiling light with quick-change covers |
-
2019
- 2019-01-30 CN CN201920162060.1U patent/CN209431246U/en active Active
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CN209431246U (en) | 2019-09-24 |
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