Switch device of high-voltage metal steaming discharge light and front light device of vehicle

A metal vapor and discharge lamp technology, which is applied in the field of vehicle headlamp devices and high-pressure metal vapor discharge lamp turn-on devices, can solve the problems of fluctuation solutions, and the characteristics of high-pressure metal vapor discharge lamps are not provided.

Inactive Publication Date: 2004-09-22
HARISON TOSHIBA LIGHTING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the invention disclosed in Japanese Patent No. 3249145 does not provide a solution to the problems caused by fluctuations in the characteristics of high-pressure metal vapor discharge lamps.

Method used

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  • Switch device of high-voltage metal steaming discharge light and front light device of vehicle
  • Switch device of high-voltage metal steaming discharge light and front light device of vehicle
  • Switch device of high-voltage metal steaming discharge light and front light device of vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0107] This embodiment is a high-pressure metal vapor discharge lamp lighting device used for lighting a mercury-free lamp in a headlight device for an automobile. figure 1 Among them, DC is a direct current power supply, SW1 is a power switch, OC is a lamp circuit, CC is a controller, IG is a discharger, and HPL is a high-pressure metal vapor discharge lamp. Next, each constituent element will be described.

[0108] The DC power supply DC is composed of a storage battery with a DC voltage of 12V.

[0109] The power switch SW1 is connected in series between the direct current power supply DC and the lighting circuit OC described later, and manages the flickering of the high-pressure discharge lamp HDL.

[0110] About the light circuit OC

[0111] The light-on circuit OC is composed of a switching voltage regulator DC / DC and a converter DC / AC.

[0112] About Switching Regulator DC / DC

[0113] Switching voltage regulator DC / DC is mainly composed of output transformer T, con...

Embodiment

[0157] Airtight container 1 : made of quartz glass, with an outer diameter of 6 mm, an inner diameter of 2.7 mm, and a surrounding portion length of 7.0 mm.

[0158] Electrode 3: made of tungsten, shaft diameter 0.35 mm, radius of curved surface at the tip that becomes the starting point of arc 0.175 mm, distance between electrodes 4.2 mm, protruding length 1.4 mm.

[0159] Discharge media

[0160] Metal halide: ScI 3 -NaI-ZnI 2 =0.4mg

[0161] Xenon: 10 atmospheres at 25°C.

[0162] Electrical characteristics: Lamp power 35W, lamp voltage 42V (when any item is stable).

[0163] About circuit work

[0164] Regarding circuit work at low temperature start

[0165] When starting at a low temperature below room temperature, since a certain period of time has elapsed since the last time the lamp was turned off, the high-pressure metal vapor discharge lamp HPL is cooled to at least room temperature. In this state, when the power switch SW1 is closed, the switching regulator D...

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PUM

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Abstract

There is disclosed a high-pressure metal-vapor discharge lamp lighting apparatus comprising control means (CC) constituted to supply a lamp power larger than a rated lamp power from lighting circuit means (OC) and light a high-pressure metal-vapor discharge lamp (HPL) and to subsequently control the lighting circuit means (OC) in such a manner that the lamp power is successively reduced in accordance with predetermined reduction ratio characteristics to settle at the rated lamp power and to be capable of varying the reduction ratio characteristics in accordance with fluctuations of rising characteristics of a quantity of light in the high-pressure metal-vapor discharge lamp (HPL).

Description

technical field [0001] The present invention relates to a high-pressure metal vapor discharge lamp lighting device capable of increasing the light intensity of a high-pressure metal vapor discharge lamp early, and a vehicle headlamp device using the lighting device. Background technique [0002] A method for turning on a high-pressure gas discharge lamp for automobile headlights, such as the method disclosed in Japanese Patent No. 3249145. [0003] In this method, the DC voltage of the battery is converted into an AC voltage, and the AC voltage is supplied to the arcing device for igniting the high-pressure gas discharge lamp, and the lamp voltage and / or lamp current are measured, and the lamp voltage and and / or the actual and target values ​​of the lamp current are compared. During the rated period of the high-pressure gas discharge lamp after arcing, use the change of alternating current to supply auxiliary electric power on top of the operating electric power of the high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/24H01J61/20H05B41/288H05B41/38
CPCH05B41/382H05B41/2882H05B41/386H01J61/125H01J61/827Y02B20/204Y02B20/00H05K7/1405
Inventor 石冢明朗
Owner HARISON TOSHIBA LIGHTING CORP
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