LV13557B - Displaceable led system - Google Patents

Abstract

A replaceable LED system adapted to selectively transform the unidirectional glow of the LEDs / LED chips and/or any other semiconductor light emitting device into a more uniform glow for better visual appeal along with providing the system as a shock, vibration resistant and unbreakable unit for wide scale and safe application and use. The LED system of the invention avoids the inherent limitation of LEDs in generating unidirectional glow / illumination and favours a comfortable wider uniform visual glow / illumination from LEDs even in directions other than the direction of installation of the LED. The LED system is suitable for use in domestic applications such as general lighting, decorative lamp, night lamp etc. apart from wide scale applications as indicator systems in industrial and automotive application such as impact resistant and unbreakable front and rear indicator lights in vehicles, signal lights in railways, road traffic and aviation lights and like.

Description

REPLACEABLE LED SYSTEM

FIELD OF THE INVENTION

The present invention relates to the replacement of a LED (Light Emitting Diode) based lamp and in particular to a replaceable LED system whlch would be shock and vlbration resistant unbreakable and also adapted to selectively transform the unidinectional glovv into a more uniform glovv for better visual appeal and Its vvide scale advantageous use / application. The LED system of the invention thus avoids the problems of its fragile and loose operative connections and shortage of the inherent limitation of LEDs in generating unidirectional glow / iliumination and hence the favor of a more comfortable / attractive vvider uniform of visual glovv / iliumination from LEDs even in directions other than the directional installation of the LED. The LED system of the invention is suitable for use in domestic applications such as general lighting, decor lamp, night lamp etc. apart from vvide scale applications as indicator systems in industrial and

Ϊ automohve application such as front and rear Indicator llghts In vehides, signal 15 llghts in Railways, road traffic and aviation Iights and the like.

BACK GROUND ART

Ught Emitting Diodes (LEDs) is a weil-known lighting system vvhich is extensively used espea'aily for various indicator / decorative applications for both domestic and industrial use.

LEDs require fonvard operating voltage and current and usually connected in series vvith current limiting resistor and / or capadtor to control current supply. It is vvell knovvn to have LED based lamps as indicators vvhich comprises of polymeric or bakelite based holders vvhich house the LEDs and their operating drcuitry of various spedications induding those involving capacitor / resistor and rectifier based drcuitry. In particular, conventional LED units, LEDs / lamps, and operating lights are loosely inserted in the housing and at the front of the filter means is releasably secured to the said holder.

Whiie several booths of shapes and configurations of such conventional LED based lamps have vvith said loosely inserted operating drcuitry and releasable filter of various oolours have been found that such LED units suffer from certain disadvantages vvhich affected its performance and large scale usage. In particular, in such knovvn LED units, in instance the LED any component number get damaged, the whole unit indusive of the holder required complete replacement vvhich added to recurring cost of maintaining such unit. Also the front cover / filter vvas found to be fragile and got damaged on minor impact. Moreover, the operative connections being looseiy assembled, in case of vibrations / shocks during use the operative connections open up resulting in freguent failure of the unit

In our co-pending Indian Patent Application No. 152 / CAL / 99 dated 26.02. 99 there is a replaceable LED lamp consisting of:

atleast one LED vvith / vvithout its operating circuitry molded / housed vvith respect to atleast the polymeric base of the desired shape and configuration to fit the desired holder having a povver suppty and operativeiy connect said led to said povver source.

The above replaceabie LED lamp is a replaceabie variety and in case of damage to the lamp one can simply replace the lamp vvithout need for disposing the holder unit, vvhich as in conventional incandescent lamps can be continualfy used. Also the molding of the operative circuitry and the stable securing of the led through proper operating connections even in environments vvhere the lamp vvas subject to vibrations / shocks during use. Also in accordance with another aspect of the replaceable LED covered in our said eariier co-pending application, there is also a proposed releasable front cover / filter of translucent polymeric material adapted to favor better illumination (lumen output) from the unit.

The above discussed replaceable LEDs take care of some of the inherent problems of conventional LED units by way of a polymeric housing support, the possible use of translucent polymeric masks as a front cover / filter in such systems. for better illumination outputs from the unidirectional LEDs used in such systems. In fact, only the system of our co-pending application is based on the need for such a translucent front cover / filter for better lumen output, several other variants to LED units have been proposed over the years to improve upon the unidirectional illumination characteristics of LEDs for varied applications / uses.

US 3875456 discloses a multi-color semiconductor lamp comprising a plurality of light emitting diodes disposed close to one another and respectively emitting the light of different colors and a light scattering layer covering these light emitting diodes.

US 5,847,507 teaches the process and apparatus for producing an effective light emission over a broad portion of the visible spectrum. A slow containing a fluorescent dye is over molded to a short wavelength light emitter (e.g., a blue LED or iaser diode) placed in a reflector cup. The fluorescent dye absorbs atleast a portion of the light emitted by the diode and re-emits the light for a second, longer vvavelength. Concentration of the dye vvithin the slow can be varied to control the extent of a region vvithin the slow vvhere most of the light is re-emitted so the remaining portion of the slow can focus the light. One can readily and consistently tailor the color of the light emitted from the slow through seJection of the number and types of fluorescent dyes added to the slow, and through their relative concentrations. Inventory is reduced and there are no additional steps required for vvhen building varied color LEDs. One simply controls the color of the LED being made by selecting from one of several possible fluorescent dye-containing slow epoxies.

WO 0182385 describes a radiation-emitting semiconductor component vvith a luminescent conversion element placed at a recess of the base body. The cup-like area is molded inside the recess around the semiconductor body, vvhich contains the luminescent conversion element and coats the semiconductor body. The cup-like portion is formed as an indentation inside the recess or as an annular border on the base of the recess.

TW 561633 discusses an LED contract-emittable device, vvhich is to dispose of an LED chip on the substrate. The LED chip is bonded to the electrode circuit through a gold string and a fluorescent agent containing a resin protection cover is placed on the LED chip. The device is characterized in that: a colored slow is disposed on the LED chip packaged by a resin containing fluorescent agent, and the colored slow is made by injection of a material mixed by a PC plastic material vvith a small amount of ultraviolet light, yellow master, green master, red master, blue master, etc The assembly of the structure can convert the light generated from the LED into the light source having a color temperature of 2000 to 5000 DEG K.

US 2004105257 proposes a flashlight having a light-emitting diode light source with first and second leads extending there from, a povver source, a povver source frame endosing atleast a portion of the povver source; a housing containing light source and povver source, svvitch located adjacent povver source and operable to close a'rcuit including light source and povver source, and vvherein one or ali of follovving may be included (1) a key ring extension extending from a povver source frame or housing vvith the key ring extension

JO having an opening whereby an artide can be attached to the key ring extension and includes a key ring vvherein upon exerting a force against the key ring lock, the key ring lock is opened to permit the artide to be attached to the key ring extension ; (2) the housing is comprised of translucent material; and (3) the housing indudes atleast one side cover vvhich is not integral vvith the housing and the atleast one side cover being selected from anodized aluminum, anodized die, anodized die vvhich indudes indicia, die struck die, laser engraved die, and a side cover having a separate med.allion attached thereto.

. US 2004105262 proposes yet another light emitting diode chip or chip array mounted on a substrate is surrounded by one or more sidevvalls. The vvall has an uneven reflecting surface to diverge the light emitted from the LED chip or chip array. The «ali may have a triangular cross-sectlon so that the emitted light diverges in ali directions. When three double-sided reflecting vvalls surround three LED panels, the reflected light becomes omni directional hemispherically and can be used in a light bulb.

It vvould be vvell apparent from the above state of art, that vvhile various attempts have been made over the years to irriprove upon the unidirectional lllumination from LED based light sources / units involving translucent covere, lenses, fluorescent dyes, light scattering means, luminescent conversion elements and use of reflecting vvalls, it is found that considering the inherent characteristics of unidirectional light output from LED lamps, ali such knovvn boiling of LED units have an inherent limitation In the visual impact of glovv of such units is always best only when led from the front since the LEDs only provide light luminance unidirectional in the direction of its installation. None of these prior LED units either solve or attempt to resolve the inherent limitation of LED lighting units from LEDs to provide onfy unidirectional ifght emission due to vvhich there is clear limitation in achieving uniform multidirectional glow / lighting based on the cost effective LED sources. Most of the attempts have been made to improve the illumination of LEDs by maintaining their inherent unidirectional light emission characteristics. In fact vvhenever multidirectional glovv is desired from LED based units it has been the usual practice to selectively dispose multiple LEDs in various directions such that the unidirectional glovv from each of the multiple LEDs together cover a vvider area vvhich, hovvever, continue to maintain the unidirectionai and spedical directional glovv emanating from the corresponding LEDs.

So much consideration vvas given to improve the unidirectional light / lumen output from LED systems that the art preferred thin translucent from covers / filters in conventionally molded covers / filters vvhich vvere either permanently or releasable secured to the base / holder unit of the system. Such requireroents of thin / translucent covers for better lumen output and assembly of units as tvvo components front and rear (holder portion) usually lead to additional problems in terms of loose operative connection and fragile LED systems difficult to handle and use.

The above state of the art thus reveals the problems / limitations associated with vvith LEDs / LED systems in achieving multidirectional uniform glovv and possible attractive view of its glovv and also problems of loose, shock / vibration affecting operative connection of its units / assembling.

OBJECTS OF THE INVENTION

It is thus the base object of the present invention to provide a replaceable LED and / or LED chip based system / lamps or other semieonduetor light emitting device based system vvhich vvould be one hand shock, vibration resistant and unbreakable on the other hand such such that atleast the portion of the externaliy vievvable light emitting device the portion of the lamp aehieves the desired uniform glovv / jighttng free of any visible unidirectional glovv from the LEDs and / or LED chip or other semiconductor light emitting device inside the unit / system.

Another object of the present invention is directed to provide a replaceable shock, vibration reslstant and unbreakable LED and / or LED chip based lamp vvith uniform extreme glow / lighting finee of any visible unidirectional glow from the LEDs vvhich vvould be one hand cost effective and on the other hand simple to manufacture such LED units available at cost effective prices for a wide range of end use / applications.

Another object of the present invention is directed to a replaceable shock, vibration resistant and unbreakable LED and / or LED chip system vvith uniform extreme glovv vvhich would avoid the problem of knovvn conventional LED units and incandescent lamps in terms of loose contact due to vibrations / shocks and fragility and consequential breakage due to mishandling and / or acddental effects.

Another object is directed to provide replaceable shock, vibration resistant and unbreakable LED / LED chip vvith uniform extemal glovv, vvhich can be easily used and replaced as any conventional incandescent lamp.

Another object of the present invention is directed to provide a replaceable shock, vibration resistant, and unbreakable LED / LED chip unit or any semiconductor light emitting device vvith uniform glovv property vvhich vvould be one hand have effective illumination and on the other hand avoid the much desired unvvanted unidirectional illuminating effects of LEDs.

A further object of the invention is directed to provide a replaceable shock and vibration resistant LED / LED chip system / unit vvith uniform glovv property and robust and nonbreakable characteristics for easy and safe handling and large-scale application.

Further object of the invention is directed to provide a replaceable shock, vibration resistant and unbreakable LED / LED chip unit vvith uniform glovv property, vvhich can be safely and conveniently used even in environments of shock and vibration.

Further object of the present invention is to provide a replicable shock, vibration resistant and unbreakable L £ O / LED chip systems / units vvhich vvould be simple to manufacture vvithout the need for any expensive / heavy machinery and / or skilled expertise.

Another object is directed to provide reptaceable shodc, vibration resistant and unbreakable LED / LED chip lamps vvith uniform glovv property vvhich can be adapted for any desired shape and configuration for use in decorative and / or industrial applications and automotive applications. SUMMARV OF THE INVENTION its thus according to one aspect of the present invention there is provided a replaoeable LED sysbem vvith uniform customirectional glovv comprising: atieast one LED and / or LED chip, or any other semiconductor light emitting device vvith or vvithout operator drcuitry permanentfy and tightly held vvithin a shock, vibration resistant and unbreakable polymeric molding / housing vvith the extemally visibfe glow able portion effective to define a very uniform glow / illumination on any visibie unidirectional giow / illumination from LEDs and / or LED Chip, or any other semiconductor light emitting device inside.

In acoordance vvith another preferred aspect of the present invention there is provided a seamless ectemal surfaced reptaceabie LED system vvith uniform customized glow characteristics comprising:

atieast one LED and / or LED chip or any other semiconductor light emitting device, vvith or vvithout its operator drcuitry permanentfy and securedly held within a shodc, vibration resistant and unbreakable pofymer) c molding / housing having a seamless extreme surface vvith the extemaliy visibie glovv able portion selectively obtained to define a substantially uniform glovv / illumination on lighting free on any visibie unidirectional glovv / illumination from the LEDs Inside.

The above disdosed seamless variety provides for improved aesthetic Outlook and surface finish to the product of any shape and cortical configuration vvhich is unigue and spedal as far as LED lighbng «nite are concemed espedally spherical and / or with bumping Central portion shaped LED units are concemed .

In the above-disdosed replaceable LED system the selection of the polymeric rnouldīng / housmg material is such that one hand near the unit (nonemitting base portion) is preferabfy a soJid moiding of the pofymeric material of the desired shape and size alongvrith the operating drcuit and the LED ba $ ically targeted at maintaining the LED and operating units shock and vibration free to «rhile the front of the uunft (atleast the emitting front portion adapted for the mulUduectional glovv) is of selective soiid polymeric constitution such that same apart from being maintained shock and impact proof is also adapted to fmportantiy avoīd the all! unidirecbonal gtow of the LEDs vvhen vievved extemally to appear as a multi directional soothing and uniform glovv of the LED unit

For the purpose of the invention, selective molding can be obtained from suitabie and selective potymeric material selected from thermosetting polymer-like polystyrene, epoxy resin and / or thermoplastic potymers. Importantly, It is found by way of present invention that cost-effecttve polystyrene is best adapted for purposes of irnparting the uniform gknv properties to the system. OptionaHy, the thermosetting pofymers can include catafyst / accelerators. Suitabie catalysts include Methyf Ethyl Ketone (MEK), Methyl Ethyl Ketone Peroxide (HEKP), Tertiary Butyl Perortde (TBP), and Benzoyl Peroxlde.

The accelerators that can be suitabie for use indude cobalt salt preferably cobalt octate.

Importantly for emitting the front portion molding applied to the selective mutation guidance glovv it is important to seiectively control the selective use of the polymeric material espedalfy pofystyrene such that the same achievements the desired shock and impact proof characteristics and also transforms the visible glovving region of the unit into a muttidirectional gtout free of any visible unldirectional glovv from the LEDs and / or LED diode or any other semiconductor light emitting intensity of the LED and / or LED chip or any other semiconductor light emitting device used and reguired to be intemally scattered for a visual more uniform glow from outside. Such controlling of the constituent of the polymeric material for such purposes of the internal scattering is accomplished by introducing agents such as preferabfy petroieum product and / or by way of chemically defuslng inside the sdective and possibfe use of glass mold espedally for seamless system of the invention proposed proposedbefore. Altemativelv, for such purposes the pofymeric material can comprise milled filler povvder preferably phosphor povvder or any other suitable milled povvder ..

JO Moreover, for uniform glow characteristics of molding / housfng can consist of said sefedive potymeric molding material involving variety of cokMir pdymeric material to add ccfor and variety to visible uniform gtow of system.

In acoordance vvith a preferred aspect the polymeric material covering the LEDs is sefectjvefy provided to achieve said uniform extemai visible glow on lighting avovding the unidirecticnal glow from the LEDs.

In acoordance vvith a preferred aspect of the present invention there is provided a repiaceable LED system vrith uniform customirectional g! Ow characteristics comprising:

atieast one LED and / or LED chip or any semiconductor light emitting device, vrith or mthout operative orcuitry permanently? and securediy held vvithin a sbodc, vybration resistant and unbreatabfe pdymeric molding / houshtg vrith the extemaHy visible glovvabfe portion having an ex £ emal appearance vvhich facilitates the substantiaUy uniform gJow / illumination on the light free of any visible uniducationalglovv / fflu.

For the purposes of such unīforrrtf? hereundnated extemal appearance on lighting the pofymertc material preferably consisting of suitable agents such as preferabl? Petroleum product more preferabt? petroieum jelly and / or by way of chemlcally defusfng Inside the selective and possible use of glass mold espeūalfy for seamless variants of the system of invention proposedbefore. Aftemativefy, the pofymeric material can comprise miOed filler povvder preferabl / phosphor povvder or an? other suitable rrolted povvder.

In accordance vvith one aspect of the above disdosed replaceable LED unit involving the LED and / or LED dhip and operating circuit are together molded Involving said selected polymeric material such that atleast the extreme visible portion of the lamp vvhen fought to provide for uniform glovv from outside free of any visible unidirectional gtow from the LEDs inside.

It vvould be «Brother apparent that LED system of the invention is therefore directed to solve the problem of unidirectional light emanating from a simple cost effective product Importantfy, also apart from uniformity of visible light in all directions of molded housing LED and operating circuit io provide for vibration proof and water proof product adapted for more useful and widespread application even in vibration and shock environments such as machines, raifways and automotive industry such as Indicator lights and like reguiring uniform extemal gtow.

In accordance vvith yet another aspect of the polymeric molded LED system vvith 15 uniform gfow properties comprise tire retardant characteristics for vvider applications of such reptaceable LEDs.

In acoordance yet arrther aspect the reptaceable LED system and in particular the uniform glow region mark can be further provided vvith deoorative pattern or surface omamentation to add aesthetic value to the product.

in accordance wrth yet another aspect of the present invention there is provided a reptaceable LED system vvith uniform multidirectional extemal glovv on lighting comprising:

atleast one LED and / or LED chip cm * any semieonduetor light emitting device, vvith or vvithout its operating drcuitry permanently and securedly held vvithin received shock, vibration resistant and unbreakable potymeric molding / housing vvith only a select portion of the externally visible portion of the lamp appearing to have a uniform glovv on lighting free of any extemal unidirectional glow of the LED to provide a combination of said uniform glow region and visible unidirectional LED gfomng region of the extemal visible portion.

In accordance with this embodiment, the decor and aesthetic aspect of the LED system can be further improved upon by way of selectively providing uniformly glovving region and some region providing the unidirectional LED glow vevvabie.

In accordance with another aspect of the present invention there is provided a replaceable LED system with uniform glow on lighting comprising:

any geometric shaped molding comprising plnrality of LEDs and / or LED chip or any semiconductor light emitting device, vvith or vvithout its operating drcuitry permanentlv, securedly and unbreakabiy held vvithin a shock, vibration resistant and unbreakable polymeric molding / housing with extensively visible portion of the lamp having a uniform glow region of light free of any visible extemal untdirectional glow of the LEDs.

In accordance with another aspect of the present invention there is provided a replaceable LED system vvith uniform glow on lighting covering:

a bulb shaped molding consisting of a plurality of LEDs and / or LED chip, vvith or vvithout Rs operating tircuîtry permanentty and securedfy held vvithin a shock, vibration resistant and unbreakable polymeric molding / housing vvith the extreme portion of visible lamp having a uniform glow region of light free of any visible extemal unidirectional glovv of the LEDs.

In acoordance wfth the preferred aspect of the present invention there is provided a replaceabie LED system vvith uniform glovv on lighting comprising:

a rectangular or square shaped molding consisting of plurality of LEDs and / or LED chip, vvith or vvithout its operating drcuitry permanentfy and securedly held within shock, vibration resistant and unbreakable polymeric molding / housing vvith the extensively visible portion of the lamp having a uniform glovv of light free of any visibJe exbemal unidirectional glow of the LEDs.

ln according vvith yet another preferred aspect of the present Invention there is provided a replaceabie LED system vvith uniform glovv on lighting comprising;

a cyilndrical shaped molding consisting of a plurality of LEDs and / or LED chips, a vvith or a vvithout its operating drcuitry permanently and securedly held vvithin a shock, vibration resistant and unbreakable potymeric molding / housing vvith the extremely visible portion of the lamp having a uniform giow of light free of any visible exbemal unidirectial glovv vS the LEDs.

Importantfy, replaceable LEDs with urfonrify extemaUy vievvabJe glovv property of the invention can be used in any conventional holders and vvould not reguire any spedalized installation for its use. In case of any reenforcement replacement of the LED system the same can be simply taken out of the holder and a fresh one can be inserted in its place.

As a weil knovvn the operative components of the replaceable LED unit of the present invention indude basie components such as conventional LEDs and / or LED diode or any semieonduetor light emitting device, the reslstors, the diodes and capaators vvhich together are housed vrfthin the mouidings obtained of said poiymsric material.

In another aspect of the present invention, there is provided a process for manufacturing the repfaceable of the LED system vvith uniform glow characteristics comprising:

(i) providing molding / housing of the desired shape and configuration for molding the LED unit containing said LEDs and / or LED chlp or any semieonduetor light emitting device and vith or vvithout operating drcuitry and defining a rear and front portion;

(if) providing atieast one LED lamp and} or LED chlp and vvithout vvithout its operative dncuftry and molding using selective polymeric material to obtain a shock, vibration resistor and unbreakable unit vvith the extemaily visitrie gknvable portion of the system at the front having a uniform glow region of dghting free erf any visible extemal unidirectial glow of LEDs f LED chip, polymeric base being adapted to match desired Shape and configuration for fitting to holder and operative connection thereto.

In accordance with yet another aspect of the method of manufacture of the replaceable LED system, the vvith uniform mutOdīrecOonal extemal glovv on lightfng comprises: 12 providing atleast one LED and / or LED chip, vvith or «uthout its operating drcultry molded to provide a permanent and secured shoek and vibration resolving operative connection, said molding carried out using selective polymeric material such that the extremely visible portion of the larnp appears to have a uniform gtovv region of lighting free of any extemal unidirectional glow of the LED to provide a combination of said uniform glow region and visible unidirectional LED glovving region on the extemal visible portion.

In accordance with this method, the decorative and aesthetic aspect of the LED system can be further improved upon by way of selectively providing uniformly glovving region and some region providing the unidirectional LED glovv viewable.

In accordance with another aspect of the present invention there is provided a method for the manufacture of a replaceable LED system vvith uniform glovv on lighting oomprising:

providing any geometric or other molded mold comprising a plurality of LEDs 15 and / or LED chips, with or without the operating drcultry housed in a molding using a selective polymeric material to provide a permanent and secured shoek and vibration resolved operative connection, said molding carried out such that extemaHy visible portion of the famp provides for a uniform gfotv of light free of any visibte extemal unidirectional gknr of the LEDs.

In accordance with another aspect of the present invention there is provided a method for manufacturing a replaceable LED system with uniform glovv on lighting comprising:

providing a bulb shaped molding consisting of a plurality of LEDs and / or LED chlp vvith or vvithout its operating drcuîtry housed in molding done using a selective pofymeric material to provide a permanent and secured shoek and vibration resilient operative connection portion of the lamp appears a uniform glow of light free of any visible extemal unidirectional gtovv ofthe LEDs.

In accordance with the preferred aspect of the method of manufacture of the replaceable LED system vvith uniform glow on lighting comprising:

providing a rectangular or square shaped molding consisting of a plurallty of LEDs and / or LED chipping vvith or vvithout its operating circufcry housed by a molding carried out using said selective molding material to provide a permanent and secured shock and vibration resistant operative connection, said molding carried out such that the extemaffy visible portion of the lamp appears a uniform glovv of light free of any visible extemal unidirectional glovv of the LEDs.

In accordance with another preferred aspect of the present invention, there is provided a method for the manufacture of a replaceable LED system vvith uniform glow on lighting comprising:

to providing a cy) indrical shaped molding comprising the plurality of LEDs and / or LEDs. chip, vvith or vvithout its operating draiitry housed in a molding carried out using said selective molding material to provide a permanent and secured shock and vibration resistant operative connection, such an extemalty lamp appears a uniform glovv of Eght free of any visible extemal unidirectional glovv of the LEDs.

In accordance vvith a preferred aspect of the method of manufacture of the seamless replaceable LED sysbem vvith uniform customirectional extemaf glovv on lighting comprising: providing a glass mold;

providing atieast one LED and / or LED chip or any semiconductor light emitting device, vvith or without its operating external molding in said glass mold, vvhich is broken after molding is complete, to provide permanent and secured shock, vibration resistant and unbreakabte operative connection , said molding carried out such that the extemal surface is seamless and atieast a selective portion of the extemaiiy visible portion of the lamp appears to have a / uniform glovv on lighting free of any extemal unidirectional glovv of LED to provide a combination af said uniform glovv region and visible unidirectional LED glovving region on the extemal visible portion.

In accordance vvith another preferred aspect of the method of manufacture of a seamless replaceable LED system with uniform customized extemal glovv on lighting comprises: 14 providing a glass mold;

providing atleast one LED and / or LED chip or any semiconductor light emitting device, witb or vvithout its operating circuit in mold glass mold, vvhich is broken after molding is complete, to provide permanent and secured shock, vibration resistant and unbreakable operative connection , said molding carried out such that the extemal | y visible portion of the lamp is seamless and appear to have a uniform glovv on lighting hee of any ertemal unidirectional glovv of the LED.

The above process of glass molding spedfically facilitates obtaining seamless surface finish of replaceable LED systems cf the invention.

The base cf the unit is molded to match to any conventional holder means to facilitate the replaceable characteristics ofthe unit ofthe invention.

The period of setting of the polymeric material in the above process «ill depend upon the polymeric material also the process of molding vvhether follovving thermosetting and tbermoptastic pof / mers.

BRIEF DESCRIPTLON OF THE FIGURES

The Detail Of The Invention Of Its Objects And Advantages Are Exp !, here is a refinement to the non-limiting exempfary ilfustrations of the replaceable LED lamp vvith uniform gtotv characteristics vvith reference to the acoompany in figures vvherein:

Figure 1: Illustrates variety of a LED unit? disdosed in applicants co pending Indian Appficatīon no. 152 / CA1 / 99

Hgures2 & 3: also illustrates boil cf filter screens and surface patts thereon provided to try to avoid the unidirectional glow of LEDs as per the applicants co pending Indian Application no. 152 / CAL / 99;

Yeah

Figures 4 & 5 illustrate the arrangements for plurality of LEDs in

LED units to achieve multl directional glow;

Figure 6: illustrates the implementation of a replaceable LED vvith uniform giovv characteristics in accordance with the present invention;

Figures 7A to 7D: illustrating the LED system vvith the uniform glow of Fig. 6 in various cross-sections vvhich reveal the molded housing of the LEDs and its operating drruitry in accordance with the present invention;

Figure 8: shovvs a conventional LED based backlight in cars and automobiles.

Figure 9 illustrates an LED system of the invention vvith uniform giovv properties suitable for use as a backlight in cars / vehides;

Figure 10: illustrates a section of the LED system vvith uniform giovv properties suitable for use with a backlight in cars / vehicles of Figure 9;

Figures 11A to 11F illustrate the external uniformly glow able portions of a further boiler of LED system vvith uniform giovv properties in accordance with vvith the present invention.

Reference is first invited to Figure 1 vvhich shovvs a replaceabie LED unit in accordance vvith our eariier co-pending application. As shovvn in the figure, such a replaceable variety of operating drcuit and LEDs (LD) are supported by way of a molded base (BS). The rear of the unit is molded and provided vvith metallic cap such as to provide a releasable operative connection vvith respect to the holder providing the povver source. In such LED units the LEDs are usually visible from outside the vvhile glovving and the illumination from the unit is based on the unidirectional glow generated by the respective LEDs. Thus due to such unidirectional glovv since the LEDs are disposed facing the front the iliumination is appreciated only from the front of the unit and even if the sides of the unit are transparent styles due to the unidirectional glow of the glovv is not appreciated from the sides. Moreover, even at the front, the illumination is along the straight path of flashing from the LEDs and cannot provide any uniform glow in multiple directions.

As shovvn in Figures 2 and 3, in order to avoid problems with unidirectional glow from such units, attempts have been made to diffuse this unidirectional glow effect generated by LEDs using decorative filters (DF) vvith checkered or concentric surface sin. Hov / ever, use of such filters vvere found not sufficient to avoid problems of unidirectional light emission from

LEDs especially vvhere an unīform glovv in multidirection is desired.

Reference is novv invited to Figures 4 & 5 which illustrates further knovvn boil 15 of LED systems vherein order to achieve ali round visual effect the multiple

LEDs (LDs) are disposed not on the front but in ali other directions vvhere the light is desired to be visible. In such modified forms vvhile It is possible to have an iliumination in multiple directions at the expense of the added LEDs, howevever, the iliumination achieved style inherited the limitation of the unidirectional glow of

LEDs. Thus the visual effects In such modified forms also continued to be that of multiple unidirectional lights emanating from several LEDs vvithout any unīform glovv characteristics.

Reference is novv invited to Figure 6 illustrates an implementation of the LED system vvith uniform glovv characteristics in accordance with vvith the present invention. As vvould be apparent from Figure 6, unlike the system of Figure 4 the LEDs inside the bulb are not visible in the outer appearance and hence vvhen glovving the unidirectional light effect from the LEDs are transformed into a uniform glovv vvhich can be apparent / visible from ali directions.

7A to 7D illustrate the characteristics of the LED system vvith uniform glovv characteristics by way of the present invention. As cleariy illustrated in said figures, in accordance with this LED system of the invention the LED along the operating circuit are molded together and housed in said polymeric molding. The shaded portion in the figures will shovv the polymeric molded region (PM) vvith the LEDs (LD) and the operating drcuitry (OP) permanently secured inside. At the rear the molded portion is adapted to fit into the conventional holder and for the purpose the mint cap (MC) is provided for an effective operative connection vvhen installed vvith respect to the holder.

Figure 7D is a sectional view along AA 'of Figure 7C shoveling the disposition of the LEDs in the molded housing.

The polymeric material used is selechvely provided such as to effectively take care of blocking the unidirectional glovv from the LEDs and favor a more uniform external glovv in multiple directions as may be desired. Importantiy, the molding of the unit is attended preferable / involving agents to take care of avoiding the visual effects of the unidirectional light emission from the LEDs and maintaining an uniform glovv from outside in multiple directions.

It vvould be clearly visible from above that the LED system of the invention apart from maintaining the durabi! Ity and non-interruptible characteristics essentially also takes care of cost-effectively transformlng the unidirectional glovv of the LED to a more uniform extemal glovv by way of very simple process.

Reference is now invited to Figure 8 illustrated with a conventional LED based tail lamp used in automotive as brake light and the like. As a vvell knovvn such LED systems essentially involve base unit (BA) adapted to support plurality of LEDs (LD) facing the top .The operating circuitry is housed in the base (BA). The top of the unit is covered by colored usually red transparent polymeric cover (PC). As vvould be apparent from the figure is such a conventional LED based tail lamp units the visual effect of glovving is that of a conventional unidirectional glovv of LED. Therefore only from the front the glovv of the LEDs is properly appreciated vvhile the glovv of the unit vvhen the vevved from the side is not that prominent. It therefore dearly affects the purpose of the indicator system on vehicles vvhich should preferably shovv the glovv uniformly in ali visible directions uniformiy.

Also in sirch conventional units since the top cover (PC) is usually obtained from plastic material, very often it is experience that such light units break even on minor impact vvhich is very frequent in case of use as tail / brake lamp in vehides. Therefore as and vvhen the cover brakes or is damaged there is need for its immediate replacement. Moreover, this conventional unit is not shock and vibration resistant.

It is thus cleariy obvious that LED based tail lamps presentiy in the use of serious problems in terms of limitations of unidirectional glovv of LED and also subject to almost regular replacement / maintenance and it is also inflammable.

Reference is now invited to Figure 9 vvhich shovvs an implementation of a tail / brake lamp comprising the LED system vvith uniform extemely visible glovv in multiple directions grazing angle in accordance vvith the present invention. As shown in said figure by shade the polymeric molded housing (MH) doesn't shovv the LEDs inside. Selected polymeric molding is provided to achieve such purpose and t

provide for a more uniform glovv effect of the LEDs free of any effects of its unidirectional glovv properties. This takes care of one hand blocking the unidirectional glovv of LED and providing for uniform extemal glovv from ali direction and on the other hand due to its solid protected molding is directed to avoid problems of brakeage / damages in case of accidental impact / mishandling .

Fig. 10 illustrates a section of the molded housing (MH) of the LED (LD) and operating circuitry (OP) in the tail / brake lamp of Fig. 9. As is cleariy illustrated ali the LED (LD) and operating arcurtry (OP) are together coverer in molded housing (MH) are LEDs and operative circuitry (OC) are permanently housed vvithin the molding to take care of the unvvanted unidirection glovv effect generated by LEDs and also avoids the problem of operation failure in environments of shock and vibration as vvell as attain the desired break free characteristics in case of impact or mishandling.

The polymeric material used is selectively selected such that the extreme uniform glovv is achieved by lighting vvithout the visible unidirectional light generated by the respective LEDs. Preferably, this is achieved by providing a suitable turbidity imparting agent such as a preferred petroleum product and / or by way of chemically frosting inside the selective and possible use of a glass mold espedally for a seamless system of the invention proposedbefore. Alternatively, the polymeric material can comprise milled filler povvder preferably phosphor povvder or any other suitable milled povvder.

. As shown in Figures 6 and 9, various other variations of the LED system are provided in the Figures 11A to 11F.

It is thus possible for the present invention to provide a replaceable LED system / lamps vvhich vvouid be such that the extreme portion of the lamp caters to the reguired uniform glovv / lighting free of any externally visible unidirectional glovv of the respective LEDs . The replaceable LED system of the invention is one hand cost effective and on the other hand simple to manufacture making such uniformly glovv able LED units available at cost effective prices for a range of end use / applications. The system is also vibration / shock resistant and avoids problems of fragility and consequential breakage due to mishandling and / or accidental effects. The replaceable LED unit vvith uniform glovv property vvouid have long life and durable use even in environments of shock and vibration and it is also a freer retardant. The system is simple to manufacture vvithout the need for any expensive / heavy machinery and / or skilled expertise and importantly favors to obtain replaceable LEDs vvith seamless extreme range of shape and configuration for varied application uses as domestic, decorative and / or industrial applications .

Claims (11)

Claims 1. a replaceable light-emitting diode (LED) system with uniform, outward-looking glare, comprising at least one LED and / or LED microsystem and / or any other semiconductor-type light emitting device with a circuit layout necessary for the system to function; or without and permanently and securely enclosed in a shock-proof and vibration-proof non-destructive polymeric / casing of thermoactive polymer and / or thermoplastic polymers, the exterior visible part of which contains a substantially uniformly luminous and light-emitting area from the LED and / or LED the inside of a microchip and / or other device emitting a semiconductor type when illuminated freely with any unidirectional visible light. 2. Replaceable light-emitting diode (LED) system, contained in a seamless housing, with a smooth, externally visible, multi-directional shine, containing at least one LED and / or LED microsystem and / or any other semiconductor type light emitting device with a circuit arrangement necessary for the operation of the system, with or without, permanently and securely enclosed in a shock-proof and vibration-proof non-destructive polymeric form / sheath, formed without joints of thermoactive polymer and / or thermoplastic polymers, the exterior visible part of which contains a substantially uniform gloss and a light-emitting area emanating from an LED and / or LED chip and / or the interior of another semiconductor-type light emitting device when it is illuminated with any one-way visible gias. The replaceable diode (LED) system according to any one of claims 1 to 2, wherein said polymeric material comprises thermosetting polymeric materials, preferably selected from polystyrene or epoxy resin. The replaceable diode (LED) system according to any one of claims 1 to 3, wherein in said uniformly shining and light emitting region, the polymer material contains agents, preferably petroleum products, which cause it to be opaque and / or opaque. using chemical matting in glass form (or surface treatment to make it micro-rough, dull or textured). The replaceable diode (LED) system according to any one of claims 1 to 4, wherein said polymeric formulation comprises waterproof and / or fire retardant materials. The replaceable diode (LED) system according to any one of claims 1 to 5, wherein said uniformly shining region is provided with a decorative pattern or surface ornament. 7. A method of manufacturing a replaceable light emitting diode (LED) system which emits uniformly exterior light in a plurality of directions, comprising at least one LED and / or LED chip and / or any other semiconductor light emitting device having a circuit layout required by the system. operating with or without operation and inserting a device into a thermosetting polymer and / or thermoplastic polymer mold casing to provide system durability and shock and vibration resistance and non-destructive operation, wherein said mold casing is designed such that the part (s) shall be aligned such that it contains a uniformly shining area when illuminated by a unidirectional light that exits freely on the exterior of the LED-type device to provide a combination of said uniform shining area with the visible uniform shining areas on externally visible parts. 8. A method of fabricating a replaceable LED system, uniformly emitting exterior light in many directions, without joints, comprising forming a glass and at least one LED and / or LED chip and / or any other semiconductor type light emitting device having a circuit layout, necessary for the operation of the system, with or without it, and the forming of said thermosetting polymer and / or thermoplastic polymers in said glass form which is destroyed after forming to ensure the durability, shock and vibration resistance of said system and its non-destructive operation, wherein said shaping is accomplished such that the externally visible portion of the lamp comprises a uniformly shining area when illuminated by an exterior unidirectional light that exits freely from the outside onto the LED-type device and / or any other semiconductor-type light emitting device. A method for manufacturing a replaceable light emitting diode (LED) system, uniformly emitting external light in multiple directions, according to claim 8, wherein said polymeric material used comprises thermosetting polymers, preferably selected from polystyrene and epoxy resins. . A method of manufacturing a replaceable light emitting diode (LED) system emitting uniformly exterior light in a plurality of directions according to any one of claims 8 to 9, wherein at least one of the following is performed to obtain at least said uniform glow / illumination area. provided that: (i) the polymeric material used selectively contains agents, preferably of petroleum origin, which are (ii) added by chemical matting to the interior of the glass mold. A method of manufacturing a replaceable light emitting diode (LED) system, uniformly emitting external light in a plurality of directions, according to any one of claims 8 to 10, wherein said polymeric material used as a molded material comprises waterproof materials and / or fireproof materials. . 12. A replaceable light emitting diode (LED) system which emits uniformly exterior light in many directions, and a method of making it, the nature of which is described herein and illustrated by reference to the accompanying figures.