Vehicular front headlight

A technology for headlights and vehicles, which is applied to headlights, vehicle lighting systems, lighting devices, etc., can solve problems such as inappropriate light sources, and achieve the effects of suppressing temperature rise, suppressing the reduction of light flux of light sources, and suppressing changes in luminous color.

Inactive Publication Date: 2004-10-13
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the brightness of the light-emitting diode increases, its calorific value also increases. Therefore, there is a problem that the luminous flux of the light source decreases or the luminous color changes as the temperature of the light-emitting diode increases. It is not suitable as a light source for vehicle headlights.

Method used

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  • Vehicular front headlight
  • Vehicular front headlight
  • Vehicular front headlight

Examples

Experimental program
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Embodiment Construction

[0037] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0038] figure 1 It is a front view showing a vehicle headlamp 10 according to an embodiment of the present invention; figure 2 yes figure 1 The II-II line profile.

[0039]The vehicle headlamp 10 places 15 lamp units 20, 22 in the lamp chamber 16 composed of the lamp body 12 and the plane light-transmitting cover 14 installed on the front opening of the lamp body. Three rows are arranged below; at the front end portion in the lamp house 16, extending reflectors 18 are provided around these lamps 20, 22.

[0040] The 10 lamp units 20 in the upper and middle rows are lamp units for forming light distribution patterns for low beams; the 5 lamp units 22 in the lower row are lamp units for additional lighting when forming light distribution patterns for high beams .

[0041] These 15 lamp units 20 and 22 are supported by a common metal support member 24 . The metal su...

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Abstract

A plurality of lighting units using light emitting diodes as light sources is accommodated in a lamp housing in such a state as to be supported on a common metallic support member provided tiltably. When a part or all of the lighting units are turned on, the light emitting diodes generate heat with a light emission. These light emitting diodes are supported on the common metallic support member. Also in the case in which any of the lighting units is turned on, therefore, the heat generated by the light emitting diodes is moved to the metallic support member having a large heat capacity through boards and light source support blocks by a heat conducting function. Consequently, a rise in the temperatures of the light emitting diodes can be suppressed.

Description

technical field [0001] The invention relates to a vehicle headlamp, which is composed of a plurality of lamp units using semiconductor light-emitting elements as light sources to form various light distribution patterns. Background technique [0002] Until now, light-emitting diodes are mostly used as light sources in vehicle signal lights such as taillights. [0003] For example, "Patent Document 1" discloses a vehicle signal lamp in which a plurality of lamp units using light emitting diodes as light sources are arranged. [0004] [Patent Document 1] JP-A-2001-332104. [0005] At present, the high brightness of light-emitting diodes is being promoted, and the trend of using such light-emitting diodes as light sources for vehicle headlights is on the rise. [0006] However, when the brightness of the LED increases, the amount of heat generated also increases. Therefore, there is a problem that the luminous flux of the light source decreases or the luminous color changes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q1/06F21S8/10F21V14/02F21V19/00F21V29/00F21V31/03F21W101/10F21Y101/02
CPCF21S48/335F21S48/1163F21V29/004F21V29/225F21S48/25F21V29/006F21S48/1159F21S48/328F21Y2101/02F21V29/2256F21Y2115/10F21S41/148F21S41/151F21S41/155F21S43/50F21S45/43F21S45/48F21S45/60F21S45/47F21W2102/00F21V29/74
Inventor 八木诚一郎大石和民井上贵司佐佐木胜
Owner KOITO MFG CO LTD
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