CN103843108A - Metal halide lamp for automotive headlamp and headlamp with said lamp - Google Patents
Metal halide lamp for automotive headlamp and headlamp with said lamp Download PDFInfo
- Publication number
- CN103843108A CN103843108A CN201280049045.7A CN201280049045A CN103843108A CN 103843108 A CN103843108 A CN 103843108A CN 201280049045 A CN201280049045 A CN 201280049045A CN 103843108 A CN103843108 A CN 103843108A
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- lamp
- light
- reflector
- diffusion part
- headlamp
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/827—Metal halide arc lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
Abstract
A discharge lamp and a headlamp with a discharge lamp are described. The discharge lamp10 includes a discharge vessel16 with electrodes 20 for generating an electrical arc. The discharge vessel includes a filling with a rare gas and metal halides. In order to avoid inhomogeneities from scattering at a salt pool 22 within the discharge vessel, the lamp further comprises a diffusing portion 24 arranged such that at least a portion of light emitted below a horizontal is diffused, and that light emitted above the horizontal is not diffused. A headlamp comprises a reflector 32 with an upper reflector portion 36 reflecting light emitted above a horizontal and a lower reflector portion 38 reflecting light emitted below. The diffusing portion 24 is arranged such that at least a portion of light reflected at the lower reflector portion 38 is diffused, and that light reflected at the upper reflector portion 36 is not diffused.
Description
Technical field
The present invention relates to discharge lamp and relate to the car headlamp that comprises discharge lamp.
Background technology
Nowadays in the forward lighting systems of automobile, use high-intensity discharge lamp.Light is produced by the electric arc in discharge vessel.In headlamp, thereby light is reflected the light distribution patterns that forms gained by reflector.
Nowadays the high-intensity discharge lamp using in car headlamp comprises filler in discharge vessel, and this filler comprises at least rare gas and the metal halide such as xenon.
US5299101 describes the car headlamp with the bubble of the discharge light with metal halide as light source being arranged in reflector.In the course of work of discharge lamp, a part of light sending is by the metal halide sediment scattering of discharge vessel bottom.The passage of scintillation light causing in order to eliminate scattering is thus arranged the lens with diffusing lens ladder in the front opening of reflector, so that the light diffusion of being launched and being reflected by the lower reflecting surface of reflector by metal halide sediment.
Summary of the invention
A target of the present invention is to propose for discharge lamp and the headlamp of required uniform light distribution patterns are provided.
This target is by solving according to the discharge lamp of claim 1 and by headlamp according to Claim 8.Dependent claims relates to the preferred embodiments of the present invention.
Discharge lamp according to the present invention comprises the discharge vessel having for generation of the electrode of electric arc.In this discharge vessel, exist and comprise such as the rare gas of xenon and the filler of metal halide.
In the work of lamp, a part of metal halide existing with liquid form can be deposited on the bottom of discharge vessel.The light sending from the electric arc between electrode can be scattered in " salt pond " that therefore form.But this optical diffusion effect is also non-constant.The accurate dimension in salt pond and position can be for example because the different operating (all like different acceleration etc.) of motor vehicles change.Equally, optical diffusion effect can be along with the lamp life-span difference, for example, due to flashing back of electrode.
Inhomogeneous in the light distribution patterns that scattering effect may cause producing from the optical system of headlamp (except reflector, can also comprise other optical elements such as photochopper and projecting lens).In addition, due to scattering effect non-constant, so be not easy to use the light quantity being transmitted into the roughly direction in salt pond from electric arc to design optical system obvious inhomogeneous in gained light distribution patterns in the case of not producing.Geometry, size and the spatial transmission rate of the variation in description of the present invention and salt pond are independently significantly improved the inhomogeneity method in gained light distribution patterns.
For this purpose, discharge lamp comprises the light diffusing diffusion part for making to send from electric arc.
Optical diffuser effect can be for example by the transparent part of lamp (such as being originally provided on the shell around discharge vessel with it or more preferably at discharge vessel) provide rough surface to obtain.Diffusion part is used so that its light scattering is passed in transmission.But contrary with the scattering effect at salt pond place, this diffuse effect is constant and reliable, and therefore can be used to design the optical system of headlamp.Optical diffuser effect can realize by the finishing of all like random distribution being obtained by blasting treatment, or also can realize by any regular surfaces pattern different from common flat surfaces alternatively.
But, because the optical diffuser effect relevant with large diffusion part also causes out of focus, so all light that the present invention proposes not to send from discharge lamp all should be diffused in diffusion part, be diffused at diffusion part place but diffusion part should be arranged so that the light only sending below horizontal line, and be not diffused at identical diffusion part place at the light above the horizon sending.Therefore, a large amount of light of sending from electric arc (such as, at least at the light above the horizon sending, but the light that preferably even a part is sent below horizontal line) at diffusion part place without undergoing diffusion.Therefore the size that, diffusion part has and position allow the light sending from discharge lamp according to the present invention still to comprise the high focused light part for the optical system of headlamp.Due to this diffusion part, at least for a part for the light sending below horizontal line, use (constant) scattering to obtain the light of the variation causing without undergoing the different size due to salt pond, position and geometry.
In the present context, refer in reflector may be orientated for generation of the lamp of the gained light distribution patterns of conventionally sending from the anterior level of motor vehicles such as the reference of " level " and " vertically ".As technical staff will understand, the discharge lamp being generally used in car headlamp is along horizontal alignment work.
Be not precluded within other positions (for example,, above the horizon) according to the diffusion part in the position below horizontal line provided by the invention the possibility of the diffuse component of other separation is provided.
According to a preferred embodiment, diffusion part is continuously and delimits, that is, do not make the light diffusing non-diffusion part of sending from electric arc be arranged in around diffusion part.Although may there are other diffusion parts for other objects on lamp, these preferably separate with diffusion part according to the present invention.
According to another preferred embodiment of discharge lamp, can on the transparent housing shell being provided in around discharge vessel, provide diffusion part.This outer casing (also referred to as external bulb) is nowadays Already in many discharge lamps, and for the object such as thermally-stabilised and/or ultraviolet filtering.According to the preferred embodiment, on outer casing, provide diffusion part.Although diffusion part is likely provided on the inner side of outer casing, especially preferred is to provide as film or coating or as the finishing in the outside of outer casing.Delimiting under the preferable case of diffusion part (that is, having the non-diffusion part around its layout), the diffusion part therefore forming preferably provides diffuse window from the teeth outwards, wherein keeps level and smooth and non-diffusion around its surface.
Discharge vessel can be made up of quartz glass.Equally, outer casing (if existence) can be made up of quartz glass.The rough surface that diffusion part can be used as quartz glass provides.This surface or " hair side " can for example provide by blasting treatment.Specifically, preferably provide rough surface by laser treatment (such as the preferred pulse laser by for rough surface structure is provided).In this context, though such as the surface texture in hole etc. with small distance formation adjacent one another are, this also will be understood to continuous diffusion part.Surface roughness should be enough by force to realize diffuse effect.Roughness Ra should be more than 6 μ m.The preferred value of surface roughness is 10-20 μ m.
Although diffusion part is effective for the optical effect of eliminating the variation being caused by salt pond, conventionally preferably only provides essential minimum scattering to limit out of focus at diffusion part place.Therefore, conventionally should limit as much as possible the size of diffusion part, in gained light distributes, still obtain required uniformity degree simultaneously.
According to a preferred embodiment, diffusion part is arranged as to the diffuse window providing in an only part for the bottom of the discharge vessel of shell.Therefore all light that, not send below horizontal line are all diffused.Diffuse window is the surf zone on the cylinder-shaped body at least substantially around electric arc (such as outer casing preferably) preferably.
Diffuse window can be arranged to cover the bottom of discharge vessel or outer casing, makes so all light of the potential site that passes through salt pond sending from electric arc all be diffused.In this way, will eliminate any different optical effect in salt pond, still reasonably limit scattered quantum, and therefore maintain focusing simultaneously.
But, according to another preferred embodiment, can further limit diffuse window.This,, because of as will be become apparent in conjunction with the preferred embodiments, can very differently use the different piece of the light sending from electric arc in car headlamp in the gained light distribution patterns forming.In favourable reflector design, for the most important region with regard to uniformity (, near the region of light distribution center), do not use the light directly vertically sending from arc center.In these favourable designs, be used for projecting to light distribution patterns center only with in vertical direction with angle send from lamp.Therefore,, according to a preferred embodiment, can axial dipole field arrange diffuse window, with a part of region between coated electrode.Therefore, limited the scope of diffuse window, at least a portion that makes to be like this transmitted into the light of vertical direction from electric arc diffusion part that can pass by.But, will pass through diffuse window with a part that becomes the light that predetermined angle sends from electric arc with lower vertical direction.This part light is preferably used for producing the center image of the electric arc in gained light distribution patterns just.
The size of diffuse window should be enough greatly so that required uniformity degree to be provided in gained light distribution patterns, but in addition should be as far as possible little.According to a preferred embodiment of the present invention, diffuse window has the axial length of 1 to 3 times corresponding to (axially) distance between electrode.The width of diffuse window is preferably to become 45 ° of +/-to 85 ° of light that send of +/-to be diffused with lower vertical direction.
Headlamp according to the present invention also comprises at least one reflector and comprises alternatively other optical elements such as photochopper and projecting lens except discharge lamp as above.
Lamp is arranged in and in reflector, makes the light sending from lamp be reflected by reflector.Reflector comprises different reflector sections, these parts at least comprise upper reflector part for being reflected in the light above the horizon sending from lamp and for be reflected in the light that sends from lamp below horizontal line reflector sections.
The diffusion part of lamp is arranged such that to be diffused from least a portion of the light of lower reflector sections reflection, and makes not to be diffused at the light of upper reflector part place reflection.
Preferably, headlamp provides the gained light distribution patterns that comprises bright/dark dead line.This bright/dark dead line (horizontal alignment conventionally, and s known as technical staff, can comprise the low-angle part that becomes to limit from horizontal line) be that the different illumination functions of acquisition (such as most important low beam illumination) are required.Between the low-intensity of bright/dark dead line more than dead line and following high strength, there is sharp contrast.Although bright/dark dead line can only be produced by the shape of reflector, in the context of the present invention preferably, bright/dark dead line is produced by the photochopper that is provided for the edge that ends photodistributed part.
According to a preferred embodiment of the present invention, lower reflector sections comprises different piece or the region of the different piece for forming gained light distribution patterns.Preferably, lower reflector sections comprise reflection from the light of discharge lamp for forming first time reflector sections of center image.Center image is the reflected image projecting near the electric arc in the region at the photodistributed center of gained.First time reflector sections can be defined as a part for lower reflector sections, but axial location is between the center, gap between lamp base and lamp electrode.
Preferably, diffusion part is arranged such that the light being transmitted in this direction being reflected at least a portion of first time reflector sections from lamp is diffused.Therefore, diffusion part is arranged in to the position corresponding to the light direction that is used for forming center image.This central area of gained light distribution patterns is most critical with regard to inhomogeneities (especially time become inhomogeneities).Because the scattering effect being caused by diffusion part is constant, so the shape of optical system and especially reflector can preferably be designed to form center image from the diffusion image of electric arc.Therefore, can realize the favourable uniform centre of gained light distribution patterns.
Due in favourable reflector design, first time reflector sections is disposed axially in after electrode, so diffusion part is preferably arranged in the direction more close with lamp base in axially offset manner with electrode.According to an especially preferred embodiment, the axial location of diffusion part is selected such that it extends axially the center, gap reaching at most between electrode and can not exceed this center.Therefore, center between electrode to the direction at diffuse window edge may with horizontal direction shape at an angle, this angle preferably 0 ° (, diffusion part is extended arrival center to the right) is to 10 ° (edge of, diffusion part is positioned at and the certain axial distance in center).
Accompanying drawing explanation
These and other aspects of the present invention, feature and advantage in connection with accompanying drawing with reference to the description of preferred embodiment and apparent and set forth, in accompanying drawing:
Fig. 1 illustrates the end view of an embodiment of discharge lamp;
Fig. 2 a illustrates according to the enlarged drawing of the discharge vessel of the lamp of Fig. 1 and external bulb;
Fig. 2 b illustrates the discharge vessel of Fig. 2 a and the sectional view of external bulb, and its middle section is to obtain along the line B-B in Fig. 2 a;
Fig. 3 illustrates the schematic side elevation of an embodiment of headlamp;
Fig. 4 illustrates the schematic diagram that is projected in the photodistributed projection screen sending from the headlamp of Fig. 3.
Embodiment
Fig. 1 illustrates the high-intensity discharge lamp for motor vehicle headlamp.Discharge lamp 10 comprises having machinery and the base 12 of electric connection and for generation of light, machinery and be electrically connected to the burner 14 on base 12.Burner 14 comprises quartz glass discharge vessel 16, and provides the cylindrical external bulb 18 of being made up of quartz glass around this discharge vessel 16.
In discharge vessel 16, electrode 20 is provided in discharge space, wherein its electrode tip is so that apart from d, axial arranged (Fig. 2 is a).According to most of automobile regulations, electrode distance d is approximately 4 mm, but can change according to different lamp type and regulations.
The filler of xenon and metal halide is provided in discharge space, makes like this between the dististyle of electrode 20, to light electric arc by applying high pressure.After lighting, the sealed electrical contact in the electric connection by via base 12 places and discharge vessel 16 is applied to electrical power and carry out pilot arc.Conventionally, carry out work for the discharge lamp of car headlamp with the steady operation power of 20 to 40 W.
Due to the structure of common corresponding discharge lamp and itself be known to the skilled for the available filler of difference of discharge vessel 16, thus following description will concentrate in target of the present invention, that is, and the possible scattering of the light sending from electric arc.
In the time of horizontal alignment work shown in discharge lamp 10 edges, the halid salt pond 22 of liquid metals will form in the bottom of discharge space.Therefore the light being transmitted into the direction of below from electric arc can depend on size, position and the optical property in salt pond 22 and be scattered.But these character in salt pond may be for example due to external force or along with the life-span of lamp 10 changes.In addition, the position in salt pond and size can change between the different lamps of discharge vessel with different interior shapes.Therefore, scattering effect also will change.In the embodiment of the discharge lamp 10 shown in Fig. 1, in the outer surface of external bulb 18, provide diffuse window 24.Although external bulb 18 of being made up of quartz glass itself is transparent, diffuse window 24 causes its a part of diffusion, makes like this light be transmitted, but scattering a certain amount of.In Fig. 1, this by relatively following both schematically show: be transmitted into the first example of the light beam 26 direction of the diffuse window 24 that passes by from electric arc, be not diffused window 24 scatterings but make like this it to be scattered at 22 places, salt pond; And the second light beam 28 sending from electric arc, it passes diffuse window 24 and is scattered there.
In the enlarged drawing of Fig. 2 a and Fig. 2 b more detail display diffuse window 24 with respect to the dististyle of electrode 20 and therefore with respect to size and the layout of electric arc.As visible, diffuse window 24 is continuous, that is, and and the complete diffusion of surf zone covering.In addition, diffuse window 24 is delimited, that is, around its external bulb 18 surface keep level and smooth and non-diffusion.In the embodiment shown, the axial length L of diffuse window 24 is approximately 2.5 times of distance d between electrode 20.Diffuse window 24 is arranged in the below, gap between electrode 20 in the axial direction also non-centrally, but arranges towards base 12 axial dipole fields.In the example shown, the axial dipole field of diffuse window 24 is arranged to the right hand edge 25 of diffuse window 24: compare more close base 12 center, gap between electrode 20.In the example shown, the center, gap from electrode in the perpendicular of the center longitudinal axis of lamp 10 start the angle beta that limits between vertical direction and the edge of diffuse window 24 be approximately 3 °.In different embodiment, the axial dipole field of window 24 can be different, make like this angle beta for example between 0 ° and 10 °, changing.
In circumference expansion, as from Fig. 2 b, diffuse window 24 is arranged to cover to become with lower vertical direction the direction of the angular range of +/-α=70 °.
Therefore, diffuse window 24 only covers a part for the lower half of light transmit direction.Specifically, angular extensions alpha can not extend to 90 ° of +/-, that is, and and the direction that is up to the standard, but diffuse window 24 remains on distance h under horizontal line, as shown in Figure 2 a.Therefore the light, being transmitted in horizontal direction is not diffused.
Fig. 3 illustrates car headlamp 30, and this headlamp comprises the reflector 32 of the socket 34 with the base 12 that holds lamp 10.Reflector 32 comprises the inner reflective surface with upper reflector part 36 and lower reflector sections 38.In addition, headlamp comprises photochopper 40 and projecting lens 42.
In the work of headlamp 30, thereby the utilizing emitted light of lamp 10 is reflected, is partly covered by photochopper 40 by reflector 32 and form gained light distribution patterns by projecting lens 42 projections subsequently.
Fig. 4 illustrates the symbology of this projection of gained light distribution patterns on screen.Light distribution patterns comprises bright/dark dead line 44 conventionally flatly stretching, and wherein sloping portion and horizontal line shape are at an angle.
As shown in symbol in Fig. 3, reflector 32 comprises that reflection is transmitted into the upper reflector part 36 of the light the peripheral part 54 of gained light distribution patterns from electric arc.In Fig. 3 and Fig. 4, corresponding light beam and the thus example of all edge images 46 of foundation are represented as dotted line.
As further shown in Figure 3, a part for lower reflector sections 38 is first time reflector sections 48, the light of its reflection from the electric arc of discharge lamp 10 to the core 52 of light distribution patterns, thus form center image 50.Center image 50 and corresponding light beam are represented as dotted line.First time reflector sections 48 is axially positioned between the center, gap between base 12 and the electrode 20 of lamp 10.
As being transmitted into light in the direction of first reflector sections 48 through diffuse window 24 from being relatively appreciated that from lamp 10 of Fig. 1 and Fig. 3.Correspondingly, first time reflector sections 48 is designed to the center image of diffusion a little 50 to project in the core 52 of gained light distribution patterns.
Therefore,, in the gained light distribution patterns shown in Fig. 4, the core 52 that is arranged to the center of close light distribution patterns is illuminated by the center image 50 of diffusion, is illuminated by all edge images 46 that are not diffused and be positioned at distance center neighboring area far away 54.In central area 52, illumination is uniformly and without undergoing the variation of position, size and the optical property in salt pond 22.
Although illustrate and describe in detail the present invention in accompanying drawing and above description, these explanations and description should be thought illustrative or exemplary and non-limiting; The present invention is not limited to disclosed embodiment.Specifically, although described preferred diffuse window 24 is not arranged between electrode 20 symmetrically, and the not whole distances between coated electrode, but symmetrical diffuse window is alternatively also likely provided, or there is in a longitudinal direction the diffuse window of larger extension.
In addition, in the embodiment shown, the light of lamp 10 is transmitted in all direction in spaces except diffuse window 24 without diffusion or concealed ground.S known as technical staff, there are discharge lamp known various modifications conventionally, comprise diffusing surface modification or shadowing elements, such as stria.Should emphasize, the difference of the present invention and these other diffusion/shadowing elements is: it is arranged to may be in the light diffusion of salt pond 22 places scattering, that is, diffuse window 24 is disposed in below horizontal line.But this is also not intended to get rid of substituting lamp, these lamps also comprise other shadowing elements or the diffuse component that are arranged in diverse location except the diffuse window 24 under electrode.Specifically, preferably, diffuse window 24 defines out with those other diffusions or shadowing elements, that is, non-diffusion part remains on around it.
Those skilled in the art are appreciated that and realize other variants of disclosed embodiment in the time that study accompanying drawing, disclosure content and the claim of enclosing are put into practice invention required for protection.
In the claims, word " comprises " or " comprising " do not get rid of other elements, and indefinite article " " or " one " do not get rid of multiple.The simple fact of some method of enumerating in mutually different dependent claims or different embodiment does not indicate the combination of these methods advantageously not use.Any reference symbol in claim should not be construed as limited field.
Claims (12)
1. a discharge lamp, it comprises:
-there is the discharge vessel (16) of the electrode (20) for generation of electric arc,
-wherein said discharge vessel (16) comprises filler, and described filler comprises at least rare gas and metal halide,
-wherein said discharge lamp further comprises diffusion part (24), described diffusion part is arranged such that at least a portion of the light of launching below horizontal line is diffused at described diffusion part place, and is not diffused at described diffusion part place at the described above the horizon light of transmitting.
2. discharge lamp according to claim 1, wherein
-described diffusion part (24) is continuous,
-and wherein non-diffusion part arrange around described diffusion part.
3. according to the discharge lamp described in claim 1,2, wherein
The transparent housing shell (18) providing around described discharge vessel (16) is provided-described lamp,
-and wherein said diffusion part (24) provide on the outside of described discharge vessel (16) or on the inner side or outside of described outer casing (18).
4. discharge lamp according to claim 3, wherein
-described discharge vessel (16) and/or described outer casing (18) are made up of quartz glass,
-and described diffusion part (24) comprise the rough surface of quartz glass.
5. according to the discharge lamp described in above claim, wherein
The diffuse window (24) only providing in a part for the bottom of described discharge vessel (16) or shell (18) is provided-described diffusion part (24).
6. discharge lamp according to claim 5, wherein
-described diffuse window (24) is arranged to cover the only part in the space between described electrode (20).
7. according to the discharge lamp described in claim 5 and 6, wherein
The axial length of-described diffuse window (24) is 1 to 3 times of distance (d) between described electrode (20).
8. a headlamp, it comprises at least:
-according to the discharge lamp (10) described in above claim, and
-reflector (32), wherein said lamp (10) is arranged in described reflector (32), make like this light that sends from described lamp (10) by described reflector (32) thus reflection forms gained light distribution patterns,
-wherein said reflector (32) at least comprise be reflected in the upper reflector part (36) of the light above the horizon sending from described lamp (10) and be reflected in the light that sends from described lamp (10) below horizontal line reflector sections (38),
-and wherein said diffusion part (24) be arranged such that at least a portion of light of locating reflection in described lower reflector sections (38) is diffused, and the light of locating reflection in described upper reflector part (36) is not diffused.
9. headlamp according to claim 8, wherein
-described headlamp is configured to be formed as comprising the gained light distribution patterns of bright/dark dead line from the light of described lamp (10) transmitting.
10. headlamp according to claim 9, described headlamp further comprises the photochopper (40) that is arranged to provide state clearly/dark dead line.
Headlamp described in one in 11. according to Claim 8 to 10, wherein
-described reflector (32) is shaped to make first time reflector sections (48) of described lower reflector sections (38) to reflect the light sending from described lamp (10) to form the center image (50) the central area that projects to described smooth distribution patterns,
-wherein said diffusion part (24) is arranged such that to send to be diffused at the light of described first time reflector sections (48) reflection from described lamp (10).
12. headlamps according to claim 11, wherein
-described first time reflector sections (48) is disposed in the position after the gap between described electrode (20) axially.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161542947P | 2011-10-04 | 2011-10-04 | |
| US61/542947 | 2011-10-04 | ||
| PCT/IB2012/055193 WO2013050914A1 (en) | 2011-10-04 | 2012-09-28 | Metal halide lamp for automotive headlamp and headlamp with said lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103843108A true CN103843108A (en) | 2014-06-04 |
| CN103843108B CN103843108B (en) | 2016-12-28 |
Family
ID=47215682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280049045.7A Expired - Fee Related CN103843108B (en) | 2011-10-04 | 2012-09-28 | Metal halide lamp and the headlamp with described lamp for car headlamp |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2745308B1 (en) |
| CN (1) | CN103843108B (en) |
| WO (1) | WO2013050914A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243501A (en) * | 1990-11-20 | 1993-09-07 | Koito Manufacturing Co., Ltd. | Automotive headlamp |
| EP0989587A1 (en) * | 1998-09-22 | 2000-03-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp and associated luminaire |
| US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
| CN1754246A (en) * | 2003-02-27 | 2006-03-29 | 皇家飞利浦电子股份有限公司 | High-pressure discharge lamp |
| CN101243537A (en) * | 2005-08-11 | 2008-08-13 | 电灯专利信托有限公司 | High-pressure discharge lamp |
| EP2190005A2 (en) * | 2008-11-25 | 2010-05-26 | Ngk Insulators, Ltd. | Light-emitting container for high-intensity discharge lamp and high-intensity discharge lamp |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2753914B2 (en) | 1992-02-05 | 1998-05-20 | 株式会社小糸製作所 | Automotive headlights |
| US5952768A (en) * | 1994-10-31 | 1999-09-14 | General Electric Company | Transparent heat conserving coating for metal halide arc tubes |
| DE10217480A1 (en) * | 2002-04-19 | 2003-11-06 | Philips Intellectual Property | Gas discharge lamp |
| DE102004005903A1 (en) * | 2004-02-05 | 2005-08-25 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High-pressure discharge lamp and method for producing a high-pressure discharge lamp |
| WO2009066244A2 (en) * | 2007-11-22 | 2009-05-28 | Philips Intellectual Property & Standards Gmbh | High-intensity discharge lamp |
-
2012
- 2012-09-28 WO PCT/IB2012/055193 patent/WO2013050914A1/en active Application Filing
- 2012-09-28 EP EP12788277.7A patent/EP2745308B1/en not_active Not-in-force
- 2012-09-28 CN CN201280049045.7A patent/CN103843108B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243501A (en) * | 1990-11-20 | 1993-09-07 | Koito Manufacturing Co., Ltd. | Automotive headlamp |
| US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
| EP0989587A1 (en) * | 1998-09-22 | 2000-03-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp and associated luminaire |
| CN1754246A (en) * | 2003-02-27 | 2006-03-29 | 皇家飞利浦电子股份有限公司 | High-pressure discharge lamp |
| CN101243537A (en) * | 2005-08-11 | 2008-08-13 | 电灯专利信托有限公司 | High-pressure discharge lamp |
| EP2190005A2 (en) * | 2008-11-25 | 2010-05-26 | Ngk Insulators, Ltd. | Light-emitting container for high-intensity discharge lamp and high-intensity discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013050914A1 (en) | 2013-04-11 |
| CN103843108B (en) | 2016-12-28 |
| EP2745308A1 (en) | 2014-06-25 |
| EP2745308B1 (en) | 2015-12-09 |
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