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High-intensity discharge lamp

A technology for high-intensity discharge lamps and discharge capacitors, which is applied to high-pressure discharge lamps, discharge lamps, and gas discharge lamps. It can solve problems such as the influence and disadvantage of light radiation characteristics, and achieve the effects of improving efficiency and reducing thermal stress

Active Publication Date: 2014-08-13
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Another disadvantage lies in the fact that with such protrusions and / or recesses in the wall of the inner tube and / or the outer tube, the light radiation properties can be affected, for example, with regard to shadowing effects
This is especially disadvantageous in the case of lamps used together with reflectors, e.g. in headlight units of automobiles, since this can significantly degrade the desired distribution of the radiated light

Method used

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Embodiment Construction

[0030] figure 1 A typical construction of a high-intensity discharge lamp is shown in longitudinal section, which involves the above-mentioned problems during start-up and steady-state operation. The lamp is provided for horizontal operation and comprises an inner tube or bulb 1 and an outer tube or bulb or lamp vessel 2 (only a part of which is shown) surrounding the inner bulb 1 .

[0031] The inner bulb 1 comprises a first central part or discharge vessel 11 having a first diameter d1 for enclosing the discharge volume. At axially opposite ends of the discharge vessel 11 there are provided a first elongated constriction 12 and a second elongate constriction 13 for enclosing electrical contacts for electrodes (not shown) extending into the discharge vessel 11 And a gas discharge is excited between the electrodes. The inner bulb 1 is enclosed by a substantially cylindrical outer bulb 2 having a second diameter d2.

[0032] According to figure 2 In the first embodiment of...

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Abstract

A high-intensity discharge (HID) lamp comprising an inner bulb (1) with a discharge vessel (11) and an outer bulb (2), especially for application in an automotive headlight unit is disclosed. A lamp design is proposed by which high thermal stresses and increased quartz temperatures during run-up and steady state operation of the lamp are avoided so that the light output and the lifetime of the lamp is improved. This is substantially achieved by a positioning of the inner and the outer bulb (1, 2) such that a longitudinal axis of the inner bulb (1) is displaced in the operating position of the lamp above a longitudinal axis of the outer bulb (2) so that the distance between the discharge vessel (11) and the outer bulb (2) at the top side of the lamp is decreased and the distance between both at the bottom side is correspondingly increased.

Description

[0001] related application [0002] This application is a divisional application of the Chinese patent application with the application number 200680017971.0 and the invention name "High Intensity Discharge Lamp" filed on May 17, 2006. technical field [0003] The invention relates to a high-intensity discharge (HID) lamp, which includes an inner bulb with a discharge vessel and an outer bulb, and is especially suitable for a car headlight unit. Background technique [0004] High-intensity discharge lamps, and in particular those proposed for use in headlight units of vehicles, operate at high power. In addition, due to the fact that a point light source is required in order to achieve a prescribed radiation characteristic within a specific reflector design, such lamps must have small dimensions. [0005] Usually, such HID lamps consist of an inner bulb (which encloses a discharge gas and a salt filling) and an outer bulb or lamp vessel which surrounds the inner bulb to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/34H01J61/52
CPCH01J61/34H01J61/523H01J61/30H01J61/84
Inventor M.哈克
Owner LUMILEDS HLDG BV
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