US20140063830A1 - Lighting apparatus for vehicle and manufacturing method for the same - Google Patents
Lighting apparatus for vehicle and manufacturing method for the same Download PDFInfo
- Publication number
- US20140063830A1 US20140063830A1 US14/015,590 US201314015590A US2014063830A1 US 20140063830 A1 US20140063830 A1 US 20140063830A1 US 201314015590 A US201314015590 A US 201314015590A US 2014063830 A1 US2014063830 A1 US 2014063830A1
- Authority
- US
- United States
- Prior art keywords
- lighting
- lighting source
- circuit board
- printed circuit
- cover
- 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.)
- Abandoned
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Classifications
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- F21S48/00—
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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
- F21V3/00—Globes; Bowls; Cover glasses
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
-
- 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
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
-
- 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
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/19—Attachment of light sources or lamp holders
- F21S43/195—Details of lamp holders, terminals or connectors
-
- 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
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
- H05K3/305—Affixing by adhesive
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
- H05K2203/1305—Moulding and encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
Definitions
- the present invention relates to a lighting apparatus for a vehicle and a manufacturing method for the same. More particularly, the present invention relates to a flexible lighting apparatus for a vehicle and a manufacturing method for the same.
- a vehicle is provided with various lighting apparatus to a front and rear side of the vehicle for offering safety and driving convenience and the lighting apparatus is a headlight, a tailing, a turn signal lamp and so on.
- the lighting apparatus includes at least one lighting source for emitting light, and recently an LED (Light Emitting Diode), having enhanced luminance efficiency, is widely used as the lighting source.
- LED Light Emitting Diode
- a lighting apparatus including an LED as lighting source has been developed.
- the lighting apparatus having the LED as the lighting source basically includes a PCB (Printed Circuit Board) for mounting the LED, a heat sink mounted to the PCB for radiating heat of the LED, and a lens for distributing the light of the LED to the outside.
- PCB Print Circuit Board
- the lighting apparatus having the LED as the lighting source may further include a reflector for reflecting the light emitted from the LED, a shield for shutting out a part of the light emitting from the LED or a part of the light reflected by the reflector, a light guide for total reflection of the light emitted from the LED.
- the LED is disposed outside of the light guide and the emitted light from the LED is laminated into the light guide. So, when the light emitted from the LED passes into the light guide though air, optical loss or optical attenuation may happen so that luminance efficiency may be deteriorated.
- DRL Daytime Running Lighting
- a general lighting apparatus is formed with hardened elements and design of a vehicle is various and thus various design of a lighting apparatus are required for responding the various vehicle design.
- Various aspects of the present invention are directed to providing a lighting apparatus for a vehicle and a manufacturing method for the same having advantages of flexibility responding to a mounting portion of a vehicle for the lighting apparatus.
- a lighting apparatus for a vehicle may include a flexible printed circuit board of which at least one lighting source is mounted on an upper surface of the flexible printed circuit board, and a cover which is made of flexible material, and connected on the printed circuit board for the at least one lighting source to be disposed within the cover, wherein the cover distributes a light emitted from the at least one lighting source to an upper direction of the cover.
- the lighting apparatus further may include a reflective portion adhering to the upper surface of the printed circuit board between the printed circuit board and the cover for reflecting the light emitted from the at least one lighting source to distribute the light through the cover.
- the cover is made of transparent material.
- the cover is formed by UV (Ultraviolet) resin.
- a lighting surface is formed to a side of the at least one lighting source.
- the at least one lighting source is plural, and the plurality of lighting sources may include a first lighting source and a second lighting source of which each lighting surface faces each other.
- the at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source which are disposed apart from each other and of which each lighting surface faces the same direction, and a third lighting source of which a lighting surface faces toward between the first lighting source and the second lighting source, wherein the first lighting source, the third lighting source and the second lighting sources are arranged alternatively along the flexible printed circuit board.
- the at least one lighting source is a LED (Light Emitting Diode).
- the cover closely contacts to the printed circuit board.
- a manufacturing method for a lighting apparatus for a vehicle may include mounting at least one lighting source to a flexible printed circuit board of which a reflective portion is adhesive to an upper surface of the flexible printed circuit board, fixing the printed circuit board to a suction table, holding a boundary frame on the suction table for the printed circuit board inserted therein, supplying melted resin within the boundary frame for the at least one lighting source to be immersed within the resin, and hardening the resin.
- the suction table is connected to a vacuum device and an inside pressure of the suction table is selectively lowered by operation of the vacuum device, wherein a suction hole is formed to the suction table, and wherein the printed circuit board is fixed to the suction table through the suction hole by a negative pressure within the suction table.
- the manufacturing method further may include vibrating the suction table for leveling of the melted resin after immersing the at least one lighting source within the resin.
- the cover is made of transparent material.
- the cover is formed by UV (Ultraviolet) resin.
- the hardening the resin is executed by the lighting apparatus passing through a UV hardening device.
- a lighting surface is formed to a side of the at least one lighting source.
- the at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source of which each lighting surface faces each other.
- the at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source which are disposed apart from each other and of which each lighting surface faces the same direction, a third lighting source of which a lighting surface faces toward between the first lighting source and the second lighting source, and wherein the first lighting source, the third lighting source and the second lighting sources are arranged alternatively along the flexible printed circuit board.
- the at least one lighting source is a LED (Light Emitting Diode).
- the lighting apparatus may be easily mounted to a vehicle without regard to shape of a mounting portion to match the design of a vehicle with flexibility.
- FPCB Flexible Printed Circuit Board
- the lighting apparatus For the lighting source is disposed within the cover, thus luminance efficiency may be enhanced comparing a general lighting apparatus which is disposed outside of a cover.
- the lighting apparatus according to an exemplary embodiment of the present invention may be widely used as various lighting apparatus as a stop lamp, a turn signal lamp and so on.
- FIG. 1 is a drawing showing a lighting apparatus for a vehicle according to a first exemplary embodiment of the present invention.
- FIG. 2 is a drawing showing a lighting apparatus for a vehicle according to a various exemplary embodiments of the present invention.
- FIG. 3 and FIG. 4 are drawings showing a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention.
- FIG. 5 is a flowchart of a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention.
- FIG. 1 is a drawing showing a lighting apparatus for a vehicle according to a first exemplary embodiment of the present invention.
- a lighting apparatus 100 includes a flexible printed circuit board (FPCB) 10 and a cover 20 made of flexible material and disposed on the printed circuit board 10 .
- FPCB flexible printed circuit board
- the lighting source 12 may be an LED (Light Emitting Diode) and a lighting surface 11 is formed to a side of the lighting source 12 .
- two lighting source 12 a and 12 b as the first lighting source 12 a and the second lighting source 12 b as a set are disposed on the upper surface of the printed circuit board 10 of which each lighting surface 11 faces each other.
- 3 sets of the first lighting source 12 a and the second lighting source 12 b are disposed facing of which each lighting surface 11 faces each other, but is not limited thereto.
- At least one lighting source 12 will be denoted as the lighting source 12 for convenience description.
- a reflective portion 15 for reflecting the light emitted from lighting source 12 is disposed on the upper surface of the printed circuit board 10 .
- Patterns for reflecting emitted from lighting source 12 may be printed on the upper surface of the reflective portion 15 , and the reflective portion 15 may be thin film and adhered to the upper surface of the printed circuit board 10 .
- the reflective portion 15 is adhered to the upper surface of the printed circuit board 10 , a shield element for shutting out light passing to the other surface of the reflective portion 15 may not be required.
- the lighting source 12 is electrically connected to the printed circuit board 10 through the reflective portion 15 and protrudes from the reflective portion 15 .
- the intensity of radiation reflected by the reflective portion 15 may sufficiently be secured.
- the lighting source 12 is immersed within the cover 20 and disposed within the cover 20 . That is, the cover 20 closely contacts the reflective portion 15 and is disposed on the printed circuit board 10 , and distributes the light reflected by the reflective portion 15 through the upper portion thereof.
- the cover 20 is made of transparent material for distributing the light reflected by the reflective portion 15 .
- the cover 20 may be formed by resin, for example plastic material, is supplied on the reflective portion 15 of the printed circuit board 10 as melted state, and is hardened. And thus the lighting source 12 is immersed within the cover 20 and the cover 20 is connected with the printed circuit board 10 .
- the lighting source 12 is disposed within the cover 20 not outside of the cover 20 and the light emitted from lighting source 12 does not pass through air, thus the light may be prevented from being disappeared due to total reflection and also luminance efficiency may be improved.
- refractive index difference between the lighting source 12 and the air is about 2.
- the critical angle for total internal reflection is about 33.9 degree.
- the lighting source 12 since the lighting source 12 is disposed within the cover 20 , refractive index difference between the lighting source 12 and the UV resin is about 1.5. In this case, the critical angle for total internal reflection is about 52.4 degree, and thus luminance efficiency may be improved.
- a heat sink for radiating heat of the LED is required.
- thermal conduction rate of the UV resin is higher than that of the air, a separate heat sink is not required.
- melting temperature of the UV resin is relative low enough to immerse the lighting source 12 within the UV resin. That is, a general light guide functioning as the cover 20 is made of material injected with relatively high temperature. When the cover 20 is made of the material same as the general light guide and the lighting source 12 is immersed within the cover 20 , then the lighting source 12 may be damaged by the cover 20 with relative high temperature. So, in the exemplary embodiment of the present invention, the cover 20 is made of the UV resin with relatively low melting temperature to immerse the lighting source 12 therewithin.
- the UV resin may be made of acrylic material with excellent light transmitting characteristic for improving luminance efficiency.
- the cover 20 is made of acrylic UV resin with composition ratio as (a) Urethane acrylate 20-60 wt %, (b) lobornyl acrylate 20-60 wt %, (c) 2-Hydroxyproyl acrylate 10-40 wt %, (d) 2-Hydroxyethyl methacrylate 9-20 wt %, (e) additive 1-3 wt % per total weight.
- the printed circuit board 10 and the cover 20 of the lighting apparatus 100 are made of flexible material, so that the lighting apparatus 100 may be bent to match to a rounded surface of a vehicle.
- the lighting apparatus 100 according to the first exemplary embodiment of the present invention is bent in FIG. 1 .
- the lighting apparatus 100 may be flat as shown in FIG. 2 then the lighting apparatus 100 may be bent to match with a rounded surface of a vehicle to be mounted thereto.
- FIG. 2 is a drawing showing a lighting apparatus for a vehicle according to a second exemplary embodiment of the present invention.
- like reference numerals of the first exemplary embodiment represent the same constituent elements and repeated description will be omitted.
- the lighting source 12 includes the first lighting source 12 a and the second lighting source 12 b of which each lighting surface 11 faces each other.
- a lighting source 14 of a lighting apparatus 200 includes a first lighting source 14 a and a second lighting source 14 b which are disposed apart from each other and of which each lighting surface 13 faces the same direction, and a third lighting source 14 c of which a lighting surface faces toward between the first lighting source 14 a and the second lighting source 14 b.
- each lighting source 14 a , 14 b , and 14 c are disposed alternately, so that reduced numbers of the lighting source 14 may be disposed on the printed circuit board 10 comparing that of the first exemplary embodiment of the present invention.
- the intensity of radiation reflected by the reflective portion 15 may sufficiently be secured.
- the lighting surfaces 13 of the lighting sources 14 a , 14 b , and 14 c may be elongated.
- the lighting apparatus 100 and 200 according to the exemplary embodiments of the present invention is required to reduce total thickness of the apparatus for securing flexibility.
- manufacturing methods for the lighting apparatus 100 and 200 according to the first and second exemplary embodiment of the present invention will be described. Since the manufacturing methods for the lighting apparatus 100 and 200 according to the first and second exemplary embodiment of the present are the same, so the identical, so the manufacturing method for the lighting apparatus 100 according to the first exemplary embodiment of the present invention will be described as an example.
- FIG. 3 and FIG. 4 are drawings showing a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention
- FIG. 5 is a flowchart of a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention.
- a suction table 30 is disposed on a manufacturing line for fixing the flexible printed circuit board 10 .
- the suction table 30 is connected with a vacuum device 60 and negative pressure may be formed within the suction table 30 by the operation of the vacuum device 60 .
- a plurality of suction hole 35 is formed to the suction table 30 , and the thin and flexible printed circuit board 10 may be fixed to the suction table 30 through the suction hole 35 using the negative pressure formed by the operation of the vacuum device 60 .
- the lighting source 12 is mounted to the printed circuit board 10 made of flexible material where the reflective portion 15 is adhesive to the upper surface.
- the printed circuit board 10 may be cut at a predetermined size.
- the printed circuit board 10 is disposed on the suction table 30 where the suction hole 35 is formed, then the vacuum device 60 is operated to fix the printed circuit board 10 on the suction table 30 through the suction hole 35 at the step S 20 .
- a boundary frame 40 is held to the suction table 30 for covering circumference of the printed circuit board 10 at the step S 30 .
- melted resin is supplied within the boundary frame 40 though a resin supplier 50 for the lighting source 12 to be immersed within the resin at the step S 40 .
- the melted resin is hardened to be the cover 20 , and UV (Ultra Violet) resin may be used.
- the melted resin requires leveling process for flatting upper surface.
- the melted resin is viscous, thus leveling with gravity consumes lots of time.
- a vibrator 70 may be equipped for vibrating the suction table 30 to level the resin at the step S 50 so that leveling process time may be reduced.
- the resin is hardened at the step S 60 .
- the suction table 30 may be hardened passing through a hardening device.
- the hardening device may be a UV hardening device.
- the boundary frame 40 is removed from the suction table 30 and then manufacturing of the lighting apparatus 100 according to the first exemplary embodiment of the present invention is completed.
- the lighting apparatus 100 and 200 is flexible, and is easily mounted to a vehicle without regard to shape of a mounting portion to match the design of a vehicle with flexibility.
- weight of a vehicle may also be reduced.
- the lighting source is disposed within the cover, thus luminance efficiency may be enhanced comparing a general lighting apparatus which is disposed outside of a cover.
- the lighting apparatus according to the exemplary embodiments of the present invention may be widely used as various lighting apparatus as a stop lamp, a turn signal lamp and so on.
Abstract
Description
- The present application claims priority to Korean Patent Application No. 10-2012-0095826 filed on Aug. 30, 2012, the entire contents of which is incorporated herein for all purposes by this reference.
- 1. Field of the Invention
- The present invention relates to a lighting apparatus for a vehicle and a manufacturing method for the same. More particularly, the present invention relates to a flexible lighting apparatus for a vehicle and a manufacturing method for the same.
- 2. Description of Related Art
- Generally, a vehicle is provided with various lighting apparatus to a front and rear side of the vehicle for offering safety and driving convenience and the lighting apparatus is a headlight, a tailing, a turn signal lamp and so on.
- The lighting apparatus includes at least one lighting source for emitting light, and recently an LED (Light Emitting Diode), having enhanced luminance efficiency, is widely used as the lighting source. Thus, a lighting apparatus including an LED as lighting source has been developed.
- The lighting apparatus having the LED as the lighting source basically includes a PCB (Printed Circuit Board) for mounting the LED, a heat sink mounted to the PCB for radiating heat of the LED, and a lens for distributing the light of the LED to the outside.
- Also, the lighting apparatus having the LED as the lighting source may further include a reflector for reflecting the light emitted from the LED, a shield for shutting out a part of the light emitting from the LED or a part of the light reflected by the reflector, a light guide for total reflection of the light emitted from the LED.
- However, generally, the LED is disposed outside of the light guide and the emitted light from the LED is laminated into the light guide. So, when the light emitted from the LED passes into the light guide though air, optical loss or optical attenuation may happen so that luminance efficiency may be deteriorated.
- Recently, some countries employ a DRL (Daytime Running Lighting) for a vehicle, and intensive interesting in design of vehicle causes various contoured or bent surfaces of a vehicle.
- However, a general lighting apparatus is formed with hardened elements and design of a vehicle is various and thus various design of a lighting apparatus are required for responding the various vehicle design.
- The information disclosed in this Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
- Various aspects of the present invention are directed to providing a lighting apparatus for a vehicle and a manufacturing method for the same having advantages of flexibility responding to a mounting portion of a vehicle for the lighting apparatus.
- In an aspect of the present invention, a lighting apparatus for a vehicle may include a flexible printed circuit board of which at least one lighting source is mounted on an upper surface of the flexible printed circuit board, and a cover which is made of flexible material, and connected on the printed circuit board for the at least one lighting source to be disposed within the cover, wherein the cover distributes a light emitted from the at least one lighting source to an upper direction of the cover.
- The lighting apparatus further may include a reflective portion adhering to the upper surface of the printed circuit board between the printed circuit board and the cover for reflecting the light emitted from the at least one lighting source to distribute the light through the cover.
- The cover is made of transparent material.
- The cover is formed by UV (Ultraviolet) resin.
- A lighting surface is formed to a side of the at least one lighting source.
- The at least one lighting source is plural, and the plurality of lighting sources may include a first lighting source and a second lighting source of which each lighting surface faces each other.
- The at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source which are disposed apart from each other and of which each lighting surface faces the same direction, and a third lighting source of which a lighting surface faces toward between the first lighting source and the second lighting source, wherein the first lighting source, the third lighting source and the second lighting sources are arranged alternatively along the flexible printed circuit board.
- The at least one lighting source is a LED (Light Emitting Diode).
- The cover closely contacts to the printed circuit board.
- In another aspect of the present invention, a manufacturing method for a lighting apparatus for a vehicle may include mounting at least one lighting source to a flexible printed circuit board of which a reflective portion is adhesive to an upper surface of the flexible printed circuit board, fixing the printed circuit board to a suction table, holding a boundary frame on the suction table for the printed circuit board inserted therein, supplying melted resin within the boundary frame for the at least one lighting source to be immersed within the resin, and hardening the resin.
- The suction table is connected to a vacuum device and an inside pressure of the suction table is selectively lowered by operation of the vacuum device, wherein a suction hole is formed to the suction table, and wherein the printed circuit board is fixed to the suction table through the suction hole by a negative pressure within the suction table.
- The manufacturing method further may include vibrating the suction table for leveling of the melted resin after immersing the at least one lighting source within the resin.
- The cover is made of transparent material.
- The cover is formed by UV (Ultraviolet) resin.
- The hardening the resin is executed by the lighting apparatus passing through a UV hardening device.
- A lighting surface is formed to a side of the at least one lighting source.
- The at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source of which each lighting surface faces each other.
- The at least one lighting source is plural, wherein the plurality of lighting sources may include a first lighting source and a second lighting source which are disposed apart from each other and of which each lighting surface faces the same direction, a third lighting source of which a lighting surface faces toward between the first lighting source and the second lighting source, and wherein the first lighting source, the third lighting source and the second lighting sources are arranged alternatively along the flexible printed circuit board.
- The at least one lighting source is a LED (Light Emitting Diode).
- According to the lighting apparatus and the manufacturing method for the same of an exemplary embodiment of the present invention, the lighting apparatus may be easily mounted to a vehicle without regard to shape of a mounting portion to match the design of a vehicle with flexibility.
- For using FPCB (Flexible Printed Circuit Board) with light weight and flexibility, weight of a vehicle may also be reduced.
- For the lighting source is disposed within the cover, thus luminance efficiency may be enhanced comparing a general lighting apparatus which is disposed outside of a cover. Thus the lighting apparatus according to an exemplary embodiment of the present invention may be widely used as various lighting apparatus as a stop lamp, a turn signal lamp and so on.
- The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.
-
FIG. 1 is a drawing showing a lighting apparatus for a vehicle according to a first exemplary embodiment of the present invention. -
FIG. 2 is a drawing showing a lighting apparatus for a vehicle according to a various exemplary embodiments of the present invention. -
FIG. 3 andFIG. 4 are drawings showing a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention. -
FIG. 5 is a flowchart of a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention. - It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.
- In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
- Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “includes” and/or “including,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Throughout the specification, like reference numerals represent the same constituent elements.
- Exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings.
-
FIG. 1 is a drawing showing a lighting apparatus for a vehicle according to a first exemplary embodiment of the present invention. - Referring to
FIG. 1 , alighting apparatus 100 according to the first exemplary embodiment of the present invention includes a flexible printed circuit board (FPCB) 10 and acover 20 made of flexible material and disposed on the printedcircuit board 10. - At an upper surface of the printed
circuit board 10, at least onelighting source 12 is mounted thereto. Thelighting source 12 may be an LED (Light Emitting Diode) and alighting surface 11 is formed to a side of thelighting source 12. - In the present exemplary embodiment, two
lighting source first lighting source 12 a and thesecond lighting source 12 b as a set are disposed on the upper surface of the printedcircuit board 10 of which eachlighting surface 11 faces each other. - In the drawing, on the upper surface of the printed
circuit board 10, 3 sets of thefirst lighting source 12 a and thesecond lighting source 12 b are disposed facing of which eachlighting surface 11 faces each other, but is not limited thereto. - Hereinafter, at least one
lighting source 12 will be denoted as thelighting source 12 for convenience description. - A
reflective portion 15 for reflecting the light emitted fromlighting source 12 is disposed on the upper surface of the printedcircuit board 10. Patterns for reflecting emitted fromlighting source 12 may be printed on the upper surface of thereflective portion 15, and thereflective portion 15 may be thin film and adhered to the upper surface of the printedcircuit board 10. - Since the
reflective portion 15 is adhered to the upper surface of the printedcircuit board 10, a shield element for shutting out light passing to the other surface of thereflective portion 15 may not be required. - The
lighting source 12 is electrically connected to the printedcircuit board 10 through thereflective portion 15 and protrudes from thereflective portion 15. - Since the lighting surfaces 11 of the
first lighting source 12 a and thesecond lighting source 12 b are faced each other, the intensity of radiation reflected by thereflective portion 15 may sufficiently be secured. - The
lighting source 12 is immersed within thecover 20 and disposed within thecover 20. That is, thecover 20 closely contacts thereflective portion 15 and is disposed on the printedcircuit board 10, and distributes the light reflected by thereflective portion 15 through the upper portion thereof. - The
cover 20 is made of transparent material for distributing the light reflected by thereflective portion 15. - The
cover 20 may be formed by resin, for example plastic material, is supplied on thereflective portion 15 of the printedcircuit board 10 as melted state, and is hardened. And thus thelighting source 12 is immersed within thecover 20 and thecover 20 is connected with the printedcircuit board 10. - Since the
lighting source 12 is disposed within thecover 20 not outside of thecover 20 and the light emitted fromlighting source 12 does not pass through air, thus the light may be prevented from being disappeared due to total reflection and also luminance efficiency may be improved. - Also, since air space does not exist between the
lighting source 12 and thecover 20, medium the light passing though is reduced and incidence rate of the light to the cover 20 (transmissivity) may be improved. - The
cover 20 may be formed by UV (Ultraviolet) resin. Refractive index of the UV resin is higher than that of the air, and also thermal conduction rate of the UV resin is higher than that of the air. In the present exemplary embodiment, when the air is reference media (refractive index=1), the refractive index of the LED as thelighting source 12 is about 3, and the refractive index of the UV resin is about 1.5. - If the
lighting source 12 is disposed outside of thecover 20, refractive index difference between thelighting source 12 and the air is about 2. In this case, the critical angle for total internal reflection is about 33.9 degree. - However, in the present exemplary embodiment, since the
lighting source 12 is disposed within thecover 20, refractive index difference between thelighting source 12 and the UV resin is about 1.5. In this case, the critical angle for total internal reflection is about 52.4 degree, and thus luminance efficiency may be improved. - In general, a heat sink for radiating heat of the LED is required. However, in the present exemplary embodiment, since thermal conduction rate of the UV resin is higher than that of the air, a separate heat sink is not required.
- Also, melting temperature of the UV resin is relative low enough to immerse the
lighting source 12 within the UV resin. That is, a general light guide functioning as thecover 20 is made of material injected with relatively high temperature. When thecover 20 is made of the material same as the general light guide and thelighting source 12 is immersed within thecover 20, then thelighting source 12 may be damaged by thecover 20 with relative high temperature. So, in the exemplary embodiment of the present invention, thecover 20 is made of the UV resin with relatively low melting temperature to immerse thelighting source 12 therewithin. - The UV resin may be made of acrylic material with excellent light transmitting characteristic for improving luminance efficiency. For example, in the exemplary embodiment of the present invention, the
cover 20 is made of acrylic UV resin with composition ratio as (a) Urethane acrylate 20-60 wt %, (b) lobornyl acrylate 20-60 wt %, (c) 2-Hydroxyproyl acrylate 10-40 wt %, (d) 2-Hydroxyethyl methacrylate 9-20 wt %, (e) additive 1-3 wt % per total weight. - In the first exemplary embodiment of the present invention, the printed
circuit board 10 and thecover 20 of thelighting apparatus 100 are made of flexible material, so that thelighting apparatus 100 may be bent to match to a rounded surface of a vehicle. Thelighting apparatus 100 according to the first exemplary embodiment of the present invention is bent inFIG. 1 . However, thelighting apparatus 100 may be flat as shown inFIG. 2 then thelighting apparatus 100 may be bent to match with a rounded surface of a vehicle to be mounted thereto. -
FIG. 2 is a drawing showing a lighting apparatus for a vehicle according to a second exemplary embodiment of the present invention. In describing the second exemplary embodiment of the present invention, like reference numerals of the first exemplary embodiment represent the same constituent elements and repeated description will be omitted. - In the first exemplary embodiment, the
lighting source 12 includes thefirst lighting source 12 a and thesecond lighting source 12 b of which eachlighting surface 11 faces each other. Referring toFIG. 2 , however, in the second exemplary embodiment, alighting source 14 of alighting apparatus 200 includes afirst lighting source 14 a and asecond lighting source 14 b which are disposed apart from each other and of which eachlighting surface 13 faces the same direction, and athird lighting source 14 c of which a lighting surface faces toward between thefirst lighting source 14 a and thesecond lighting source 14 b. - According to the second exemplary embodiment of the present invention, the lighting surfaces 13 of each
lighting source lighting source 14 may be disposed on the printedcircuit board 10 comparing that of the first exemplary embodiment of the present invention. - And with the alternating disposition, the intensity of radiation reflected by the
reflective portion 15 may sufficiently be secured. - For securing sufficient intensity of radiation, the lighting surfaces 13 of the
lighting sources - The
lighting apparatus - Hereinafter, manufacturing methods for the
lighting apparatus lighting apparatus lighting apparatus 100 according to the first exemplary embodiment of the present invention will be described as an example. -
FIG. 3 andFIG. 4 are drawings showing a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention andFIG. 5 is a flowchart of a manufacturing method for a lighting apparatus according to an exemplary embodiment of the present invention. - Referring to
FIG. 3 toFIG. 5 , a suction table 30 is disposed on a manufacturing line for fixing the flexible printedcircuit board 10. - The suction table 30 is connected with a
vacuum device 60 and negative pressure may be formed within the suction table 30 by the operation of thevacuum device 60. - A plurality of
suction hole 35 is formed to the suction table 30, and the thin and flexible printedcircuit board 10 may be fixed to the suction table 30 through thesuction hole 35 using the negative pressure formed by the operation of thevacuum device 60. - If distance between each
suction hole 35 is equal or less than 20 mm, low pressure difference may fix the printedcircuit board 10 thereto without damage of the printedcircuit board 10. - At the step S10, the
lighting source 12 is mounted to the printedcircuit board 10 made of flexible material where thereflective portion 15 is adhesive to the upper surface. The printedcircuit board 10 may be cut at a predetermined size. - The printed
circuit board 10 is disposed on the suction table 30 where thesuction hole 35 is formed, then thevacuum device 60 is operated to fix the printedcircuit board 10 on the suction table 30 through thesuction hole 35 at the step S20. - Then, a
boundary frame 40 is held to the suction table 30 for covering circumference of the printedcircuit board 10 at the step S30. - Then melted resin is supplied within the
boundary frame 40 though aresin supplier 50 for thelighting source 12 to be immersed within the resin at the step S40. - In this case, the melted resin is hardened to be the
cover 20, and UV (Ultra Violet) resin may be used. - The melted resin requires leveling process for flatting upper surface. However, the melted resin is viscous, thus leveling with gravity consumes lots of time.
- Thus, a
vibrator 70 may be equipped for vibrating the suction table 30 to level the resin at the step S50 so that leveling process time may be reduced. - Then the resin is hardened at the step S60. In the present exemplary embodiment, since the resin may be formed by UV resin, the suction table 30 may be hardened passing through a hardening device. And the hardening device may be a UV hardening device.
- The
boundary frame 40 is removed from the suction table 30 and then manufacturing of thelighting apparatus 100 according to the first exemplary embodiment of the present invention is completed. - As described above, the
lighting apparatus - For using the flexible printed circuit board with light weight and flexibility, weight of a vehicle may also be reduced.
- For the lighting source is disposed within the cover, thus luminance efficiency may be enhanced comparing a general lighting apparatus which is disposed outside of a cover. Thus the lighting apparatus according to the exemplary embodiments of the present invention may be widely used as various lighting apparatus as a stop lamp, a turn signal lamp and so on.
- The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/923,143 US9992877B2 (en) | 2012-08-30 | 2015-10-26 | Manufacturing method for a lighting apparatus for a vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2012-0095826 | 2012-08-30 | ||
KR1020120095826A KR20140028768A (en) | 2012-08-30 | 2012-08-30 | A lamp apparatus for automobile and manufacturing method thereof |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/923,143 Division US9992877B2 (en) | 2012-08-30 | 2015-10-26 | Manufacturing method for a lighting apparatus for a vehicle |
Publications (1)
Publication Number | Publication Date |
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US20140063830A1 true US20140063830A1 (en) | 2014-03-06 |
Family
ID=50098580
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/015,590 Abandoned US20140063830A1 (en) | 2012-08-30 | 2013-08-30 | Lighting apparatus for vehicle and manufacturing method for the same |
US14/923,143 Active 2034-05-05 US9992877B2 (en) | 2012-08-30 | 2015-10-26 | Manufacturing method for a lighting apparatus for a vehicle |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US14/923,143 Active 2034-05-05 US9992877B2 (en) | 2012-08-30 | 2015-10-26 | Manufacturing method for a lighting apparatus for a vehicle |
Country Status (4)
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US (2) | US20140063830A1 (en) |
KR (1) | KR20140028768A (en) |
CN (1) | CN103672653B (en) |
DE (1) | DE102013109436A1 (en) |
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US20210193635A1 (en) * | 2018-09-11 | 2021-06-24 | Lg Innotek Co., Ltd. | Lighting module and lighting assembly including same |
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DE102015004693B4 (en) | 2015-04-11 | 2023-11-02 | Audi Ag | Lighting element, rear light, vehicle and manufacturing process for the lighting element |
US20170284623A1 (en) * | 2016-03-31 | 2017-10-05 | GM Global Technology Operations LLC | Methods and apparatus for free-form illumination assemblies |
EP3388732A1 (en) * | 2017-04-14 | 2018-10-17 | Valeo Iluminacion | Lighting device and manufacturing method |
EP3928028A1 (en) * | 2019-02-21 | 2021-12-29 | Hella Gmbh & Co. Kgaa | Lighting device, in particular lighting device for a vehicle |
US11325283B2 (en) * | 2020-03-17 | 2022-05-10 | GM Global Technology Operations LLC | Injected LED light assembly |
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Also Published As
Publication number | Publication date |
---|---|
CN103672653A (en) | 2014-03-26 |
CN103672653B (en) | 2016-06-08 |
KR20140028768A (en) | 2014-03-10 |
US9992877B2 (en) | 2018-06-05 |
US20160044793A1 (en) | 2016-02-11 |
DE102013109436A1 (en) | 2014-03-06 |
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Legal Events
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Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JAEHONG;OH, YOUNG SUB;LEE, BOCK CHEOL;AND OTHERS;REEL/FRAME:031120/0812 Effective date: 20130827 Owner name: KIA MOTORS CORPORATION, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JAEHONG;OH, YOUNG SUB;LEE, BOCK CHEOL;AND OTHERS;REEL/FRAME:031120/0812 Effective date: 20130827 Owner name: HYUNDAI MOBIS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JAEHONG;OH, YOUNG SUB;LEE, BOCK CHEOL;AND OTHERS;REEL/FRAME:031120/0812 Effective date: 20130827 |
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