CA1064089A - Rectangular headlamp filament shield - Google Patents
Rectangular headlamp filament shieldInfo
- Publication number
- CA1064089A CA1064089A CA272,586A CA272586A CA1064089A CA 1064089 A CA1064089 A CA 1064089A CA 272586 A CA272586 A CA 272586A CA 1064089 A CA1064089 A CA 1064089A
- Authority
- CA
- Canada
- Prior art keywords
- headlamp
- filament
- set forth
- lens
- shield
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
- F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
- F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
Abstract
ABSTRACT OF THE DISCLOSURE
A filament shield is disclosed which eliminates much of the lower beam glare caused by the shape of a rectangular headlamp. The shield is shaped to prevent light from the filament from impinging on the planar sidewalls of the reflector.
A filament shield is disclosed which eliminates much of the lower beam glare caused by the shape of a rectangular headlamp. The shield is shaped to prevent light from the filament from impinging on the planar sidewalls of the reflector.
Description
R:ECTA~GULAR HE~D~M~P FI~ lENT SMIEI.D
This invention relate~ to vehicle headlamps and, in particular, to rectangular vehicu:Lar headlamps adapted to produce one ox more light bPams, at least one of which is a depressed beam suit~ble for use when passi:ng vehicles travel-ing in the opposîte direction.
In the automotive industry, the size9 shape, and placament of headlamp~ as well as t:he optical performarlce of ` headlamps are sub]ec~ to regulation by an agency o~ the Federal Government. A recent change in these regulations has enabled the use of headlamp~ ha~ing a rectangular shape when viewed from the front.
The re~tangular shape of the lens i~ ena~lad by cutting the paraboloidal reflector with planes ~herein re ~erred to as "sidewalls") to produce the desired shape at ~he open end of the paraboloid. When gla~s having the prescribed shape is aluminiæed (given a ~eflective coating, usually on ~- the inner ~urface of tha paraboloid), the sidewalls a~e also ; made reflective.
2G A finished lamp, having the reflecto~ thu~ described, produces considerable glare in use, i.e,~ undesirable hi~h levels of lightO On the "low beam" setting, extraneous ligh~
has been found above the~corr~ct high intensity area of the beam pattern. Much of this light cornes jErom the lower side-wall of l:he lamp. I~ight re:Elec:ted from the upper sidewall, when fuxther reflected by bumpers or other refl~ ting sur~aces around ~h~3 headlarnp, adds tv the glars, as does light from the left and right sidewalls. This glare rr~ it di~Eicult to 6 ~ LD 7 0 6 7 meet the gover~ment regulations noted above and makes the lamp inerior in adverse weather conditions ~here backs~atter impedes visibility, e.g., rain, ~og, and snc,w.
The problem has been recognized in the indu~try, and the solution to date ha~ been to ~urn away some o~ the coating from the sidewall~ of the l,~mp. Unfortunately, when the coating is r~moved from the sida~alls 3 it i~ also removed, to a lesser extent~ from the paraboloidal surface. This xeduces ~he e~ectiveness of the reflector and, hence, the maximum candle power o~ the lamp. In addition, the burni.ng process is not uniform from lamp to lamp and is detrimental to lamp appearance.
In lower beam headlarnps, xound or rectangu~ar, a filament shield is used over the lower beam filament to prevent light from the filament from goiny direc~ly to the lensO In round lamps, control of the beam is thus assured by the ref lector and the lens prescription. So ~ar as is k~own 9 no one has proposed using a filament shield to pre~ent light from reaching poxtions oE the reflector of a headlamp~
For e~ample 9 see U.S. Paten~ Nos. 2 9 277 9 563, 2,366,~2;
This invention relate~ to vehicle headlamps and, in particular, to rectangular vehicu:Lar headlamps adapted to produce one ox more light bPams, at least one of which is a depressed beam suit~ble for use when passi:ng vehicles travel-ing in the opposîte direction.
In the automotive industry, the size9 shape, and placament of headlamp~ as well as t:he optical performarlce of ` headlamps are sub]ec~ to regulation by an agency o~ the Federal Government. A recent change in these regulations has enabled the use of headlamp~ ha~ing a rectangular shape when viewed from the front.
The re~tangular shape of the lens i~ ena~lad by cutting the paraboloidal reflector with planes ~herein re ~erred to as "sidewalls") to produce the desired shape at ~he open end of the paraboloid. When gla~s having the prescribed shape is aluminiæed (given a ~eflective coating, usually on ~- the inner ~urface of tha paraboloid), the sidewalls a~e also ; made reflective.
2G A finished lamp, having the reflecto~ thu~ described, produces considerable glare in use, i.e,~ undesirable hi~h levels of lightO On the "low beam" setting, extraneous ligh~
has been found above the~corr~ct high intensity area of the beam pattern. Much of this light cornes jErom the lower side-wall of l:he lamp. I~ight re:Elec:ted from the upper sidewall, when fuxther reflected by bumpers or other refl~ ting sur~aces around ~h~3 headlarnp, adds tv the glars, as does light from the left and right sidewalls. This glare rr~ it di~Eicult to 6 ~ LD 7 0 6 7 meet the gover~ment regulations noted above and makes the lamp inerior in adverse weather conditions ~here backs~atter impedes visibility, e.g., rain, ~og, and snc,w.
The problem has been recognized in the indu~try, and the solution to date ha~ been to ~urn away some o~ the coating from the sidewall~ of the l,~mp. Unfortunately, when the coating is r~moved from the sida~alls 3 it i~ also removed, to a lesser extent~ from the paraboloidal surface. This xeduces ~he e~ectiveness of the reflector and, hence, the maximum candle power o~ the lamp. In addition, the burni.ng process is not uniform from lamp to lamp and is detrimental to lamp appearance.
In lower beam headlarnps, xound or rectangu~ar, a filament shield is used over the lower beam filament to prevent light from the filament from goiny direc~ly to the lensO In round lamps, control of the beam is thus assured by the ref lector and the lens prescription. So ~ar as is k~own 9 no one has proposed using a filament shield to pre~ent light from reaching poxtions oE the reflector of a headlamp~
For e~ample 9 see U.S. Paten~ Nos. 2 9 277 9 563, 2,366,~2;
2 ~ 858 9 467, 2, 880 J 347; 2, 987 9 643; and 37136,91~ in which the ~ilament shield does not cut of~ the filament light going to the reflec~or. In U.S. Patent ~7OS. 2,795,722 and 3~908,144, it may appear that such is the caser However, what i9 actually provided are kwo sets of optics in a singl~ struc~ure to obtain a two~color li~ht output, usually red and white~ ~
~L3~ .
In view of the foregoing, it is therefoxe an objec-t of the present .invention to provide an improved rectangu:Lar headlamp.
~D6~
Another object of the present in~ention i~ to pro-vide an all-weather rectangular headlamp~
A further ob]ect of the present invention is to provide an improved filament shield for a rectangula:r headlamp.
Ano~her object of the pr~sent invention i~ ~o reduce the glare from a rectangular headlamp by blocking the filamant light from selected portions of th2 reflect:or.
The foregoing objects are achieved in the present invent~on wherein the filament 3hield comprises a first ¦
surface having a cross se~tion which is g~ometricall~ similar to the shape o~ the lens. Attached to the sides of thQ ~hield are tabs having shapes geometrically similar to the respective sidewall adjacent each tab and aligned wi~h respect to a filament of the lamp to p*event light from the filament ~rom impinging on the sidewalls.
~--~ ' .
FIG. 1 illustrate~ a rectangular headlamp in accordance with the present invention.
FIG. 2 is a perspective view of a fil~ment shield in accordance wlth the present inventionO
FIG. 3 is a perspective view of arl alternative embodiment o~ a filamenk shield in ac~ordance with th2 present invention .
. .
DESCRIPTION OF THE P~ E~RED EMBODIMENTS
In FIG. 1, lamp 10 comprises a cover gla~s or lens 11 sealed to a pressed glass reflector 12 about the perlph~ry thereof. Reflector ~2 is in khe shape of a parfiboloidal re-~lector intersec~ed by plan~s ~orming ~op, bottom9 left~ and ri~ht sid~walls, o~ which ~op sidewall 13 and bottom sidewall , . .. . :-. . : ~
14 are illustrated in FIG. l. The inner surface of reflec~or 12 is provided with a coating 15 of a suitable light-reflecting material such as aluminum or silver. As illustrated in FIG. 1, in accordance with the present invention, it i3 unnecessary to remove the reflective coating from the ~idewalls~
Loca~ed in the ~egion of the focu~, o~ the paraboloidal surface formed by re1ector 12 are one or more filaments, ~uch as filaments 16 and 17 which are connected by leads 18 and l9 to contacts 21 in the manner known in th0 art. As known in th~ art, one of filaments 15 and li is posikioned at the focus of re1ector 12 while the othe~ filament is po~itioned sl.ightly ¦
o~f ~ocus to form an upper be~m pattern. In the particular case illustrated, the invention is shown as embodied in a headlamp having two filaments with separate fila~nents for ¦
selectively producing either a l~wex beam for u~e whe~ passing vehicles traveling in the opposite direction or an upper beam for use in open country. It should be understood however th~t the i~ventiorl is applicab7 e as well to single ilament head-lamps for producing only one licJh~ b~n such as~ for example~
a lower beam.
In accordance with the present invention, headlamp lO is provided with a light-inter~epting shield 23 which is mounted in front o~ filaments 16 and 17 and is ~haped to inter cept not only the light which would directly impin~e upon lens ll, but also the light that would impinge on cextai~ portions o~ reflector 12, specifically the sidewalls. ~ile shield 23 may be held in place by any suitable means, it is preferably supported in lamp lO by being crimped or otherwise secured to a rigid support wire~ which in turn is secur~d in the s~me manner as fil~ment lead-in wir~ 18 and l9~
. .
FIG. 2 illustrates in perspective the configuration of shi~ld 23 which partially surrounds fil~lents 16 and 17.
Specifically, shield 23 comprises a planar c;urface 24 having a shape that is geometrically similar to the cross section of lens 11. By geometrically similar is meant that the shadow cas~ by planar sur~ace 24 is approximataly I:he same shape as lens 11~ Connected to suxf ace 24 at the edges thereof ar. e a plurali~y of tabs 25-28 which serve to shield the sidewalls and are geometrically similar to the sidewalls so that ~le light from neither f ilament can directly impinge upon the respective. sidewall adjacent each tab.
Dué to surface 24, lens 11 does not receive light directly from either filament 16 or filament 170 Tabs 25-28 prevent light :Erom directly impinging upon any o:E the ~;ide-walls. Thus, it is not necessary to buxn off the reflective CQating from any of the sidewalls of the lamp in accordance with the present invention. This increases the uniformity of coating obtain~ble in each lamp and, additi-onally~ reduces the glare produced by the lamp in a~suring ~hat direct light impinges only upon the desired portions of re~lec~or 12 so that the light emitted by lamp 10 is more carefully controlle.d.
FIG. 3 illustrates an alterna~ive embodiment o ~he present invention in which shield 30 is provided with a non plan~r surface 31 for shielding len~ rom direct ligh~
from the filaments. The ~hape of surface 31 is not rri~ica provided that sur~ace 31 tenminates in a plane and the inter-section of surface 31 and that pl~ne define a shape ~eomet~
ri~ally similar to the shape of len~ llo Similarlyl t~bs 32-35 ~eed not be planar but may have any desixed suxface so long as the projection of the shapes of tabs 32-35 by ~ila-ments 16 and 17 coxxesponds to the shape of the respect:ive ... , ., .. :
1~64~8g LD 7067 sidewall adjacent each tab.
In addition, shield 30 may be provided with aperture 36 for enabling direct lig~t fxom one of f:Llaments 16 and 17 to impinge on lens 11, for example, when the lamp is used to produce an upper driving beam ~or use in opell country. As is known by those of skill in the axt, the shape of aperture 36 depends upon the beam pa~tern characterlstics desired~ as more fully described in the aforementioned U.S. Patent NoO
~L3~ .
In view of the foregoing, it is therefoxe an objec-t of the present .invention to provide an improved rectangu:Lar headlamp.
~D6~
Another object of the present in~ention i~ to pro-vide an all-weather rectangular headlamp~
A further ob]ect of the present invention is to provide an improved filament shield for a rectangula:r headlamp.
Ano~her object of the pr~sent invention i~ ~o reduce the glare from a rectangular headlamp by blocking the filamant light from selected portions of th2 reflect:or.
The foregoing objects are achieved in the present invent~on wherein the filament 3hield comprises a first ¦
surface having a cross se~tion which is g~ometricall~ similar to the shape o~ the lens. Attached to the sides of thQ ~hield are tabs having shapes geometrically similar to the respective sidewall adjacent each tab and aligned wi~h respect to a filament of the lamp to p*event light from the filament ~rom impinging on the sidewalls.
~--~ ' .
FIG. 1 illustrate~ a rectangular headlamp in accordance with the present invention.
FIG. 2 is a perspective view of a fil~ment shield in accordance wlth the present inventionO
FIG. 3 is a perspective view of arl alternative embodiment o~ a filamenk shield in ac~ordance with th2 present invention .
. .
DESCRIPTION OF THE P~ E~RED EMBODIMENTS
In FIG. 1, lamp 10 comprises a cover gla~s or lens 11 sealed to a pressed glass reflector 12 about the perlph~ry thereof. Reflector ~2 is in khe shape of a parfiboloidal re-~lector intersec~ed by plan~s ~orming ~op, bottom9 left~ and ri~ht sid~walls, o~ which ~op sidewall 13 and bottom sidewall , . .. . :-. . : ~
14 are illustrated in FIG. l. The inner surface of reflec~or 12 is provided with a coating 15 of a suitable light-reflecting material such as aluminum or silver. As illustrated in FIG. 1, in accordance with the present invention, it i3 unnecessary to remove the reflective coating from the ~idewalls~
Loca~ed in the ~egion of the focu~, o~ the paraboloidal surface formed by re1ector 12 are one or more filaments, ~uch as filaments 16 and 17 which are connected by leads 18 and l9 to contacts 21 in the manner known in th0 art. As known in th~ art, one of filaments 15 and li is posikioned at the focus of re1ector 12 while the othe~ filament is po~itioned sl.ightly ¦
o~f ~ocus to form an upper be~m pattern. In the particular case illustrated, the invention is shown as embodied in a headlamp having two filaments with separate fila~nents for ¦
selectively producing either a l~wex beam for u~e whe~ passing vehicles traveling in the opposite direction or an upper beam for use in open country. It should be understood however th~t the i~ventiorl is applicab7 e as well to single ilament head-lamps for producing only one licJh~ b~n such as~ for example~
a lower beam.
In accordance with the present invention, headlamp lO is provided with a light-inter~epting shield 23 which is mounted in front o~ filaments 16 and 17 and is ~haped to inter cept not only the light which would directly impin~e upon lens ll, but also the light that would impinge on cextai~ portions o~ reflector 12, specifically the sidewalls. ~ile shield 23 may be held in place by any suitable means, it is preferably supported in lamp lO by being crimped or otherwise secured to a rigid support wire~ which in turn is secur~d in the s~me manner as fil~ment lead-in wir~ 18 and l9~
. .
FIG. 2 illustrates in perspective the configuration of shi~ld 23 which partially surrounds fil~lents 16 and 17.
Specifically, shield 23 comprises a planar c;urface 24 having a shape that is geometrically similar to the cross section of lens 11. By geometrically similar is meant that the shadow cas~ by planar sur~ace 24 is approximataly I:he same shape as lens 11~ Connected to suxf ace 24 at the edges thereof ar. e a plurali~y of tabs 25-28 which serve to shield the sidewalls and are geometrically similar to the sidewalls so that ~le light from neither f ilament can directly impinge upon the respective. sidewall adjacent each tab.
Dué to surface 24, lens 11 does not receive light directly from either filament 16 or filament 170 Tabs 25-28 prevent light :Erom directly impinging upon any o:E the ~;ide-walls. Thus, it is not necessary to buxn off the reflective CQating from any of the sidewalls of the lamp in accordance with the present invention. This increases the uniformity of coating obtain~ble in each lamp and, additi-onally~ reduces the glare produced by the lamp in a~suring ~hat direct light impinges only upon the desired portions of re~lec~or 12 so that the light emitted by lamp 10 is more carefully controlle.d.
FIG. 3 illustrates an alterna~ive embodiment o ~he present invention in which shield 30 is provided with a non plan~r surface 31 for shielding len~ rom direct ligh~
from the filaments. The ~hape of surface 31 is not rri~ica provided that sur~ace 31 tenminates in a plane and the inter-section of surface 31 and that pl~ne define a shape ~eomet~
ri~ally similar to the shape of len~ llo Similarlyl t~bs 32-35 ~eed not be planar but may have any desixed suxface so long as the projection of the shapes of tabs 32-35 by ~ila-ments 16 and 17 coxxesponds to the shape of the respect:ive ... , ., .. :
1~64~8g LD 7067 sidewall adjacent each tab.
In addition, shield 30 may be provided with aperture 36 for enabling direct lig~t fxom one of f:Llaments 16 and 17 to impinge on lens 11, for example, when the lamp is used to produce an upper driving beam ~or use in opell country. As is known by those of skill in the axt, the shape of aperture 36 depends upon the beam pa~tern characterlstics desired~ as more fully described in the aforementioned U.S. Patent NoO
3,13~,914.
There is thus provided by the present in~ention an improved lignt shield for rectangular headl~mps which both xeduces the glare from these headlamps and, at the sa~e time~
simpli~ies the manufacture thereof. As is apparent to those of skill in the art, various modifications can he made within the spirit and scope of the present invention. For example, it i~ within he contemplation of the present inv~ntion to use a non-lit filament as part of the shield in a multifilament lamp. Specifically, in a two-filament lamp~ part o.~ t~b 34 wa~ removed 91nCe it was preventing light from upper beam coil 17 from reachin~ the paraboloidal surface. However3 when coil 16 is incandescent, coil 17 shields lower sidewall 14 in addition to tab 34.
e ., .
.
i ~
, :
, .
There is thus provided by the present in~ention an improved lignt shield for rectangular headl~mps which both xeduces the glare from these headlamps and, at the sa~e time~
simpli~ies the manufacture thereof. As is apparent to those of skill in the art, various modifications can he made within the spirit and scope of the present invention. For example, it i~ within he contemplation of the present inv~ntion to use a non-lit filament as part of the shield in a multifilament lamp. Specifically, in a two-filament lamp~ part o.~ t~b 34 wa~ removed 91nCe it was preventing light from upper beam coil 17 from reachin~ the paraboloidal surface. However3 when coil 16 is incandescent, coil 17 shields lower sidewall 14 in addition to tab 34.
e ., .
.
i ~
, :
, .
Claims (8)
1. In a rectangular headlamp having a lens, a reflector in the shape of a paraboloid intersected by four planes which form the sidewalls thereof, and at least one filament positioned in the region of the focus of said paraboloid, the improvement comprising:
filament shield means having a first portion positioned between said filament and said lens and a second portion comprising a plurality of tabs positioned between said filament and respective sidewalls, wherein said first portion is geometrically similar to said lens and said tabs are geometrically similar to the respective sidewalls.
filament shield means having a first portion positioned between said filament and said lens and a second portion comprising a plurality of tabs positioned between said filament and respective sidewalls, wherein said first portion is geometrically similar to said lens and said tabs are geometrically similar to the respective sidewalls.
2. The headlamp as set forth in claim 1, wherein said first portion is planar.
3. The headlamp as set forth in claim 1, wherein said first portion is three-dimensional.
4. The headlamp as set forth in claim 1, wherein said tabs are attached to the periphery of said first portion.
5. The headlamp as set forth in claim 4, wherein said shield means is completely opaque.
6. The headlamp as set forth in claim 4, wherein said first portion contains an aperture for selectively permitting light from said filament to reach said lens directly.
7. The headlamp as set forth in claim 6, wherein said headlamp comprises two filaments, one of which intersects the focus of said paraboloid.
8. The headlamp as set forth in claim 7, wherein said filament shield means includes a non-lit one of said fila-ments.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/669,985 US4029985A (en) | 1976-03-24 | 1976-03-24 | Rectangular headlamp filament shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064089A true CA1064089A (en) | 1979-10-09 |
Family
ID=24688528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA272,586A Expired CA1064089A (en) | 1976-03-24 | 1977-02-24 | Rectangular headlamp filament shield |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4029985A (en) |
| JP (1) | JPS52116674A (en) |
| CA (1) | CA1064089A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2392323A1 (en) * | 1977-05-23 | 1978-12-22 | Cibie Projecteurs | NEW RECTANGULAR OPENING AUTOMOTIVE SPOTLIGHT |
| US4280173A (en) * | 1978-06-19 | 1981-07-21 | General Electric Company | Heat shield for plastic headlamp |
| NL184550C (en) * | 1982-12-01 | 1989-08-16 | Philips Nv | GAS DISCHARGE LAMP. |
| US4642514A (en) * | 1984-09-28 | 1987-02-10 | Gte Products Corporation | Automobile headlight with combined heat and light shield |
| DE3540130C1 (en) * | 1985-11-13 | 1987-04-02 | Hella Kg Hueck & Co | Headlights for motor vehicles |
| US4754373A (en) * | 1986-10-14 | 1988-06-28 | General Electric Company | Automotive headlamp |
| US4882660A (en) * | 1986-11-13 | 1989-11-21 | General Motors Corporation | Headlamp assembly |
| US4740875A (en) * | 1987-05-07 | 1988-04-26 | Gte Products Corporation | Motor vehicle headlight having lens with glare prevention means |
| US4987343A (en) * | 1988-10-03 | 1991-01-22 | General Electric Company | Vehicle headlamp |
| JPH07109721B2 (en) * | 1990-08-07 | 1995-11-22 | 株式会社小糸製作所 | Vehicle headlights |
| DE19544012A1 (en) * | 1995-11-27 | 1997-05-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric light bulb with anti-dazzle device and method for producing such a lamp and anti-dazzle device for an electric light bulb |
| US5993035A (en) | 1998-03-09 | 1999-11-30 | Trans Technology Engineered Components, Llc | Combined light shield and heat shield for headlight |
| US6450670B1 (en) | 1999-09-15 | 2002-09-17 | North American Lighting, Inc. | Lamp assembly with heat transfer system |
| US20040202004A1 (en) * | 2003-04-09 | 2004-10-14 | Guide Corporation, A Delaware Corporation | Bifunctional headlamp having a rotating shield with integral actuator |
| EP2066965A1 (en) * | 2006-09-13 | 2009-06-10 | Philips Intellectual Property & Standards GmbH | Lamp for motor vehicles |
| CN111322587B (en) * | 2018-12-13 | 2022-09-02 | 深圳市中光工业技术研究院 | Light source device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE536105A (en) * | 1954-03-02 | |||
| DE1197825B (en) * | 1963-05-07 | 1965-08-05 | Bosch Gmbh Robert | Headlights for motor vehicles |
| GB1221946A (en) * | 1967-08-16 | 1971-02-10 | Lucas Industries Ltd | Sealed beam lamps |
| JPS5034784U (en) * | 1973-07-27 | 1975-04-14 | ||
| GB1477138A (en) * | 1973-11-14 | 1977-06-22 | British Sealed Beams Ltd | Filament shields |
| US3898451A (en) * | 1974-07-29 | 1975-08-05 | Gen Motors Corp | Rectangular sealed beam headlamp unit |
-
1976
- 1976-03-24 US US05/669,985 patent/US4029985A/en not_active Expired - Lifetime
-
1977
- 1977-02-10 JP JP1311877A patent/JPS52116674A/en active Pending
- 1977-02-24 CA CA272,586A patent/CA1064089A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52116674A (en) | 1977-09-30 |
| US4029985A (en) | 1977-06-14 |
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