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Efficient white lamp for vehicle headlight

A technology for headlights and vehicles, which is applied in the direction of headlights, vehicle parts, gas discharge lamp parts, etc., and can solve problems such as transmission efficiency that are not mentioned

Pending Publication Date: 2021-01-19
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] An example of a previous approach is: DE1 020080330 19A1 proposes an interfering and / or absorbing coating transmission close to the maximum of eye sensitivity, thus providing a high color temperature, but does not mention the material composition of the coating and its transmission efficiency ; and US6508573B1 proposes various red-absorbing metal oxides for thin films on glass bulbs for incandescent lamps, giving the lamp a color temperature of 4000 K

Method used

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  • Efficient white lamp for vehicle headlight
  • Efficient white lamp for vehicle headlight
  • Efficient white lamp for vehicle headlight

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Embodiment Construction

[0028] Various embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] figure 1 The range of colors achievable with the coating of an incandescent lamp according to the invention is shown. The x-axis 12 corresponds to the x-value of CIE 1931 xy-chromaticity and the y-axis corresponds to the y-value of CIE 1931 xy-chromaticity. The dashed line shows the Planckian locus 30 . Area 22 shows the area characterizing the white light emitted by incandescent lamps complying with the ECE R37 regulation (Regarding the adoption of uniform technical specifications for equipment and parts intended for, being fitted and / or used on wheeled vehicles agreement, and the conditions for mutual recognition of approvals granted based on these specifications. Regulation No. 37: Uniform provisions concerning the approval of the use of filament lamps in approved lamp units for motor vehicles and their trailers). The smaller shaded area 24 abo...

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Abstract

The invention describes an incandescent lamp for a vehicle headlight (50) comprising a transparent vessel (5), wherein the vessel (5) encloses at least one filament (3, 3a, 3b), wherein the vessel (5)is at least partly covered with a coating (7), wherein the coating (7) comprises at least one pigment, wherein the at least one pigment is arranged such that light emitted by the at least one filament (3, 3a, 3b) and traversing the coating (7) is transformed to transformed light (55), wherein the transformed light (55) is characterized by a chromaticity according to the CIE 1931 xy-chromaticity with y being in between the Planckian locus and y=0.5*x+0.205 and 0.36.

Description

technical field [0001] The invention relates to an incandescent lamp for vehicle headlights, in particular automobile headlights, which emits white light with high efficiency. The invention further relates to a vehicle headlight comprising such an incandescent lamp. Background technique [0002] Incandescent and similar halogen lamps used in automotive headlights (eg H1, H4, H7, H11) are often characterized by a white light with a yellowish tinge. Previous methods of improving light quality to a purer white came at the expense of reduced efficiency. [0003] An example of a previous approach is: DE1 020080330 19A1 proposes an interfering and / or absorbing coating transmission close to the maximum of eye sensitivity, thus providing a high color temperature, but does not mention the material composition of the coating and its transmission efficiency and US6508573B1 proposes various red-absorbing metal oxides for thin films on glass bulbs for incandescent lamps, giving the lam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01K1/32H01J61/35H01J61/40H01K9/08H01J9/20
CPCH01J9/20H01J61/35H01J61/40H01K1/32H01K9/08F21S41/162F21V3/00F21S41/12H01J9/205
Inventor J·科瓦尔斯基J-S·斯特拉特曼L·库珀M·D·帕库尔斯基
Owner LUMILEDS HLDG BV
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