HUE033106T2 - Lamp with a lamp vessel coated in places - Google Patents

Description

Lámpa részben bevont íémpabpriva!

LAMP WITH A LAMP VF SSL L COATED IN PLACES

eismiEiioN

[00011The Invemiph-fflátts tőiig lamp ín icppfdanci; with the preamble of claim i, .%, Prior art |0iil|iucp a lamp lst for example., disclosed In she disclosure documenl·. DE 40 39 948 Al. This document describes a Palo#an mepnpescant lamp for # motor vehicle headlight with two incandescent filaments for the mifb beam and dipped: beam, the lamp vessel pf which is provided with a multi-layer coating In the region of the pipped beam incandescent ilia ment. so as to generate yellow light.

[00031 DE 1Q2 47 983 A1,£P 0 772 378 A^ Of 10::10 64P D| and P§ dnudose lamps with mated lamp vessels. :i!i :ëm^ÈMMiMÉÊÊÊmÉËm [0004] It is the object of the invention to provide a generic, lamp with an improved coating of the lamp vessel., which reduces the dazzle effect of the lighting means, without diminishing the lummence, that is to say, the Summation intensity in the main radiation direction of the lamp. {$005jin atxordai^è j^itfÉihé lüHhööh the said object is achieved by the features of fdatm i. Particularly advantageous embodiments of the invention are described m the dependent daims, f||(||jlhp InyenP« lamp pbosessas s lamp base and a lamp vessel fixed therein, together with atdeast one lighting means arranged within the lamp vessel^ wherein an at least partially light absorbing coating Is arranged on the surface of the lamp vessel, which coating is arranged on a section of the lamp vessel that is close to the base and extend* a* far a* a maximum height above the lamp base thabls lesplfhah the Hejghtsqf the at least one lighting means above the iamp base.

[(.1()07] By means of thés coating the light beams that leave the lamp m the mg ion that a; close to the base, and do not make any significant contribution to the dermed dkun inai me function, m accordance with the invention are partially absorbed., or, in on example that. t§ not part of the invention, are' completely absorbed. In particular in the case of a vehicle headlight lamp., which is used, for example, to implement a dipped beam., the kpn tern ν>·- that leasv t m lamp sr toe region that is dose to the base, and contribute to the illumination of the area near I he vehicle and to the visibility values above the light-dark cut-off, but do not moke any significant contribution to the region near the light-dark cut-off important for read illumination, in accordance with the Invention are partially absorbed by the coating, or, in an example that is not part of the invention, are co m p le tel y a hso r bed, [0008)The coating of the Inventive lamp thus contributes, «least in the case of a vehicle headlight lamp, to the reduction of the da Tail e effect of the ffhing mea«s, owing to the absorption of the light beams contributing to the visibility values above the: light-dark cut-off. On the other hand, the coating of the inventive lamp the section of the iamp vessel located opposite the lighting means and enclosing the lighting: means, so that the light beams that make the primary contribution to the illumination intensity m the region near the light-dark cut-off important for road illumination are not weakened by the coating. In particular, with an inventive lamp, which, for example, is used as a vehicle headlight iamp, a high illumination intensify can therefore be achieved in the region important for road illumination near the light-dark cut-off, with at the same time a reduction of the darde effect of the lighting means.

[0008)In an exemplary lamp the coating Is designed to be opaque, in accordance with the invention the coating is designed such that it preferably parbaHy or completely absorbs light from a prescribed spectral range. In an exemplary lamp that possesses only one lighting means, for example one incandescent filament., the coating can be designed to be opaque so as to reduce the casks effect. Alternatively, in the case, of the inventive lamp, which possesses; phly οηρ Sighting means, for example one incandescent flamant, the coatihi can however lisp be designed such that it preferably absorbs light from a prescribed spectral range. Its Sever#ptefpCSoh # the thickness and the material used tor thi ciating, iy inferably absorbing light from a prescribed spectral range, the coloured appearance of the biáilifpiM Tf&fh thiifègtPh df tm. lemp vmmi îhhf# close ts ihf Iss® finÉif colour gpf. looks bteoc|y tOtpThe headlamp. on The section pf the #%at is ciopsto the base extends preferably as far as the lamp base &m covers; thp lurfige of the section of the lamp vessel that so close to the base completely. The sealed section of the lamp vessel protruding info the lamp base preferably remains unc.oated, In order to avasd any problems w«th the mounting.

[GO id Vine inventive lamp is provided with a further coatmg, which is arranged on the:; surface of a section of the lamp vessel that is remote from, and faces away from, the lamp base. This further boating defends in the direction of the iamp base as far as a minimum height, above the lamp base, which is greater than the sum of the height of the at least one lighting means above the lamp base, and the extent of the at least one lighting means in the direction of the longitudinal extent Of the lamp. Formulated In other vvordf, the further coating on the section of the lamp vessel that is remote from the base, and the coating on the section of trie iamp vessel that is dose to the base, are separated by an annular uncoated section of the lamp vessel enclosing the at Mast One lighting means. The further coating also preferably cavern the dome of the lamp vessel, if this has not already been designed to be opaque to light. By means of the further coating the darde effect of the inventive lamp is further reduced, because the light, beams from the end section of the lamp vessel that is remote from the base, which also do not make any important contribution to the desired illumination power function, in accordance with the invention are now also partially absorbed, or. In an example that is not part of the :i nveh tigrp a re qgm pie t el y abso rb ed ÍOQI2|For the above-cited reasons, the further coating of the lamp, in a nem-mvershye example. Is also designed to be opaque to light, or alte?natively and in accordance with the invention, is designed such that it preferably absorbs light from a prescribed spectral range.

[.00:1 3]The invention is preferably applicable to Incandescent lamps that have one or two incandescent filaments as lighting means, and is partieu|arly;:pp:ferpity appijiaplp fo incandescent lamps for vehicle headlights. tiOMpp ifcgordahce with same preferred examples of embodiment of the invention, the löÄtly# mmp possesses twb; ; insandésééri. filament is.arraag^p at a first height above the lamp base, and the second incandescent filament «s arranged at a second lower height above the lamp base in the Interior of the lamp vessel,, and wherein the coating is arranged on a section of the samp vessel that is close to the base and extends over a maximum height above the lamp base: that is less hum the first height and greater than the second height, Bv means of the coating, which in this case preferably absorbs light from a prescribed spectral range, as has already been explained above., the dazzle effect originating from the first incandescent filament is reduced, Without the light beams transmitted from the first Ihcahdescent filament m the main emission direction thereby being weakened by the coating., since the coating does not extend onto the section of the lamp vessel enclosing the first incandescent filament. The above-cited coating Is arranged on the lamp vessel In the region of the second incandescent filament, and is preferably designed such that the section of the lamp vessel provided with the coating that is dose to the, base annularly encloses the second incandescent filament. By this means the colour temperature or the colour of the light emitted from the second incandescent element can be altered by means of the coating on the section of the lamp vessel that Is dose to the base, In accordance with the Invention this coating is designed such that it absorbs ught from the long-wave spectral i^b|d:;:|i,e,:frbm! the range of the red, yellow and green fight) more strongly than light from the short-wave spectral range (i.e. from the range of the blue and violet light). By this means, as has already been explained above.» the dazzle effect of the light originating from the first incandescent filament can be reduced, and moreover the dölbäri emitted by the second incandescent filament can he raised to a value in the range from approx. 3500 Kelvin to 4500 Kelvin.

[0015] in accordance with the invention the above-described two-filament incandescegl lamp possesses a further coaflngpwblch is arranged on a section of the lamp veil that is remote from and faces away from the lamp base., and which extends in the direction of the iamp::pie-:Ä:Wr ^I.rÂÉppumheight above the lamp base that is greater than toe si m at ih*» height oi the hrd uvano -rer t o nr -it ^ove the lamp base and uv ' of the first incandescent element in the direction of the lopgitydlhal iMht of thg lamp.

By this means the dazzle effect of the light originating from the first incandescent-filament is further reduced,

Hi. 'Ws^ßmMSM ,ρΐΐΜ^ [00)6]The invention is elucidated In more detail In .w|^l:;^||:|^::;.vytth theiaiimf ipriferted examples of embodiment Here:

Figure 1 shows a side view of a lamp in accordance with an exemple that Is not part of the invention.

Figure 2. shows a side vsew of a lamp Inaçprdanee i& a best example # embed I mem of t"e -mambón, fsgyre 3 shows a side view of a lamp in accordance With a second Maniple of the invention that is not pact of the invention«

Figure 4 shows a side view of a lamp in accordance with the second example of embodiment of the invention, [0017}Figure 1 shows a schematic representation of the structure of the halogen incandescent lamp In accordance with a first example that is not part of the invention. These halogen incandescent lamps take the form of a so-called H? lamp, and are provided for operation at a nominal voltage of 12 volts in a motor vehicle, The power consumption of this lamp at an operating voltage of 13,2 volts Is approx. 55 watts.

[OOlBjThis halogen men ^descent lamp possesses a glared, essentially cylindrical, lamp vessel 100, whrch at one end is provided with a base 102, Within the lamp vessel 100 is arranged an; axially-aligned Incandescent coli 103, whose coil outlets, encaild by molybdenum tubes, are in each paie yielded to power supply wires 104, 1 Oil The two power supply wires 104>. 1J5 erá li each case connected in an electrically conducting manner w^h^n-^pppal^imln#fi06, A0? of the base 102, The lamp vessel IDl consists of a quarts glass or a tempered glass, for example aluminium silicate glass, [OOlSjThe dome 101 of the lamp vessel ss designed to be opaque to light and Is provided with a track costing. The section 1010 of the lamp vessel 101 arranged In the immediate vicinity of the lamp base 102 ;s fitted on Its outer surface with a coating 108. This coating starting ltom |0e lamp base 102, extends as far as a maximum heigil Hg glove the lamp basa 102 that is equal to or less than the h£ig&t3% -OlltidliMPbdtSiifit Cili 3:03 above the lamp base 102, The coaling iO&Üitends annularly over the Whole of the outer surface of toe section 1010 of the lamp vessel 100 that is dose to the base and Is arranged underneath the incandescent coll 103, |0020)The editing IDS takes the form, for example, of an interference filter coifing With I filter edgearfanged in a narrow range of light wavelengths, in which the filter underftpsi pl|ransition from high to low absorptiorty-'ordtia^tis in accordance with US 8,369,910, which, for example, absorbs yedow, red and green light more strongly toon bine and violet light, bo the ease of an interference flierfhe niter edge is set, for example, such that the interference filter absorbs long-«wave iightHO particular the light colours of red. yellow and green, more strongly than short-wave light! such as, for example, blue and violet light. The absorption mvei of tho interference filter can be set to the desired level by way of additional absorber layers in the interference filter. In the case of a dip coating in accordance with US 6,369,510 both the absorption level, and also the colour temperature of the coating 10B can be controlled by way of the layer thickness.

[0023 ] fhgure 2 depicts a samp in accordance with the hrsr example of embodiment of the invention, Ttus lamp differs from the lamp m accordance with the first example that is not part of the invention only so that the lamp vessel 100 has a further soaring !0i on the outer surface of a section 1011 of the lamp vessel that ss remote asm the base, and is arranged in the immediate vicinity of the» lamp vessel dome 109, in all oilier details MM lamp represented *n Figure 2, >n accordance with the first example of embodiment, corresponds to the iamp depicted in Figure 1 in accordance with the first example that is not part of the invention, [00221 The same reference symbols are therefore used in Figures t and 2 for identical pasts of the lamp. The further coating 109, starting from the edge of the dome 10.1, extends in The direction Of the lamp base 102 as far as a minimum height H« above the lamp base 102, which is the same as or greater than the sum of the height Hw of the : incandescent coll 103 above the iamp base 102 and the extent L of the incandescent cod i:03 in the direction of the longitudinal extent of the iamp. The further coating 109 is of identical design to the coating 108. in the case of the iamp in accordance with the firs! example of embodiment Of the invention, only: the section of the lamp vessel 100 .irmulüÿ enclosing the incandescent coil 10:3:11 thus designed so as to be:uncoated. f0023!Uowever, m an-example that is not part of the 109 can alternatively be designed to be opaque to light, or can have different filter properties so that they absorb light from various spectral ranges more strongly m order to giyelo the lamp another appearance, [00241 Figure 3 represents a lamp in accordance Is net part of the invention. Tins lamp takes the form of a halogen incandescentiampylih particular an H4 iamp, which is intended for deployment, in the headlight of a.:il5bW'Vähldi.P>; (Öö25]This incandescent lamp possesses a glaaed lamp vessel 300,, which ;s fixed m a metallic base 302, The dome 301 of the lamp vessel 300 Is designed to be opaque to light and is provided, for example, with a hiacx coating. Within the lamp vessel 300 are arranged a first incandescent coil 303 for the purpose # generálig the dipped beam light, arid a second incandescent cod 304 for the purpose of generating the main beam sight, tdidfher with a dipped: beam cap dû$< TM:i^dÄnäeiiid#:'^ö«s föl, 304 consist of tungsten, and the dipped beam cap 30S consists of a molybdenum plate. Three power supply wires 30?, 308, 309, which are produced in molybdenum, serve to provide the mountings arid the electrical power supplies to the incandescent, colls 303, 304, The power supply Wires 30?, 308, 309 are fixed In a bridge 310 of quarts gsass, are led out of the sealed end of the lamp vessel 300, and in each case an- connected With an eiectncel contact 320, 321 of the base 302. The fsrst end of the first incandescent coil 303 is connected with the first, powep supply wire 307. The second end of the first incandescent coil 303 m fixed on the dipped beam cap 30S. Here the dipped beam cap 30S, together with the first 30? and third power supply wires 309, also serves to provide the power supply to the first Incandescent cod 303, The; second mcgqdpcent C0U 304 is fixed onto the power supply wires 308, 309.

[0020] The section 3010 of the lamp vessel 302, arranged in the Imptedlate vicinity of the lamp base 300, is fitted on its outer surface with a coating 33Ô, ffispating 330, starting : from the lamp base 302, extends as far as a maximum height-¾ above the lamp base 302, which is equal to or less than the height H? of the first incandescent coil 303 above the lamp base 302., and is greater than the height of the second incandescent cod 304; above the lamp base 302, The coaling 308 extends annyfarly over the whole Of the outer surface of the section 3020 that js dose to the base of the lamp vessel 300., and Is arranged underneath the first incandescent coil 303. In particular the coating 339 annuiarly encloses the second incandescent coil 304. |002?]Tne coating 330 takes the form, for example, of an interference fiber coating with a filter edge arranged in a narrow songe of hqht waveienphl^fb which the filter Uüáeng^i' i tligh to low âbsorptldh,^Â:Mliii;:#tiê form of a dip coating

IhJiiÈsqiiaqWWltit it; *§§0, which absorbs ylhbw, rad and: green light more étÂfly^hémblu«.· af$f" víöíet light, In the ease of an interference fílten||i£,:f$i«f í^í4|f selildch: that theThferference filter absorbs long-wave light, in particular thedlghtTdliUis iffbtóy.^ÉllóW'aöi-0^0% morn strongly than short-wave light, such -m, :fèr and violet light. Tina absorption:level gf:;|:h^:''tp^r^rfpce biter can be set to the desired fgyoi by way of adtbtionaf absorb?* savers in the interference filter, In! the case of a dip coating in accordance with US 6,36^..510 the absorption level of the coaimg 330 a no also of the light €anl||:ibiitrbiigd; by way of the foyer thickness, 10028] ihe coatmg 330 reduces the dszsie effect of Use light originating from thé first Knr\im> cn\ sOh 303 and \ masev b'C eok i ‘ temp uoh oo U ikp't o omohng ness toe second incandescent coil 304, [0029]Figure 4 depicts a lamp m accordance with the second example of embodiment of toe invent i ^ us iamo o **em “rom the moy f at,, > parse auto the se^o s example that is not part of the invention only in that the lamp vessel 300 has a further coating 340 on the outer surface of a section 30Π of the lamp vessel that is remote from the base,, and is arranged in the ! ítvc eel iota vicinity of the lamp vessel dome 301. in ail other details the lamp represented m Figurer 4 In accordance with the second example of embodiment corresponds to Use lamp depicted in Figure 3 in accordance w4h the second example that is not part- of the invention. The same reference symbols are therefore used 1rs Figures 3 and 4 for Identical parts of the lamp, The further coating 340, starting from the edge of the dorne 301., extends in the direction of the iamp base 302 as far as a nanImai height Hj above the iamp base 302., which is the same as or greater than the suns of the height H, of the first incandescent coil 303 above the iamp base 302 and the extent LI of the first incandescent cod 303 in the direction of the longitudinal extent of the tamp. The further coating 340 Is of identical design to the coating 330, in the case of the iamp in accordance with the second example of embodiment of the invention only the section of the iamp vessel 300 anhularly enclosing the first incandescent coii 303 Is thus designed so os to be uncoated.

[OOlOjThe inyentlphUs not limited to the above examples of embodiment described in more detail.

[00311 For example., die coatsng 330 depicted sn Figures 3 and 4 can also be designed with a light absorption, level that is reduced, either in a stepwise manner or continuously, from the lamp base m the direction of the lamp vessel dome 30 L In particular the coating 330 can he designed such that a region annuiariy enclosing the second Incandescent edit 3i4y which extends between the heights H* and Ms, has a lower tight absorption than in the region between the height H,, and the iamp base 302. In a sirnple manner tbit can be achieved by means of a fedoced layer thickness of the coating 330 in ihe·regtear'l^^^nlIÉt -heights M« encloses the second incandescent coii Í0ö32jj Alternatively, howeví?r: the coaUhtf 330depleted In figures 3 and 4 cÄalM Μ designed such that It extends from the lamp base 302 only as for as the height H*, and mus Use hump vessel 300 Is uncoated 1rs the region of the two incandescent cods 303, 304, [00331 Moreover, the lamp vessel dome 101, 301, instead of the black coating., can also have a ooatmg of another colour, for example* a silver colour. Alternatively however, the black coating of the lamp vessel dome iOi, 30'J can also he omitted, and, for example* the further coating 109 con instead extend as far as the lamp vessel dome 101- [0034]The invention can furthermore also be applied to incandescent lamps, which have an incandescent coil aligned transverse to the lamp vessel axis, such as for example H3 lamps.

Claims (2)

izé baöáitoí :: i g ê hÿpbhtëk A lamp head cap (102, 302) and a lamp cap (10,6, 300) therein and at least one fitting element (103, 303) disposed within the lamp bulb {100, 300), wherein said lamp envelope (300, 300) interacts with said head; (IÔ.10, 301.0) is provided with a light absorbing coating (108, 330) which is &amp; Lamphead {102} above a maximum height (H *>. H <) which is equal to or less than the height (H **, kb) of the at least one violet element (M3, 303) above the lamp head (102, 302) and wherein, at the distal end of the lamp head (100, 300) opposite to the head of the lamp head (102, 302), an additional light-absorbing coating (109) is provided which is the lamp head (102, "0 ?!"). , o ¾ *, ¾! p! af!, 02, 30 ') »the life of today sneoavv and XH <not the rJ is the same or larger, at least one world element (103, 303) lamp head (102, 302) the sum of the height of the height (H j, Hj) and the at least one world element ft, 11 measured along the longitudinal direction of the lamp direction, is that the coating (108, 330) extends between the head (blade 3010) and the further coating (100) on the distant spacing of development {10-11, 3011} the Fragrance (100): edge: it is unmounted to the at least one illuminating element (103, 303), without the coating. characterized by the fact that the uncoated lamp envelope section is annular, and the coating is at least partially absorbed by the coating (109) and the shotgun (109) so that the light is red, yellow and green. range absorbs more strongly, sample light in the blue and violet spectral range. The lamp of claim 1, wherein the coating (108, 330) and the further coating (100) are formed as an interference filter coating, wherein the filter is a filter. is configured so that the interfering filter suppresses red, shade and green long wavelength light and sehhen as blue and violet wavy waves, or as a dipping coating that absorbs red, yellow and green light more than the two and violet lights. % A lamp according to claim 1 or 2, wherein at least one of the refiners is an ÄIMI (1.03, 303). The lamp of claim 1 or 2, wherein the first filament (303) is arranged at a first height (H>) above the lamp head (302), the second filament (304) is at a second, lower height (H,) is located above the lamp head (302) in the interior of the lamp envelope (300), wherein the coating (330) at the head (3010) near the head of the lamp body (300) at the height of the lamp head (302) at a maximum height (H). the same or less, mini <§2 also height (1¾} and larger than the second magnet (¾¾ i <A á> lamp according to demand, with the cover (330) with the ssakggg (3010) the thread ^ aburan {300} rings the second mussel (004) in the form of a ring. $> -MI "S. Claims coughing or lobby sseHnti lamp, which is formed by a lorn bulb.