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Lighting controller of lighting device for vehicle

一种控制装置、控制方法的技术，应用在道路车辆、信号装置、照明装置等方向，能够解决增加LED数量、不能实现车辆用灯具小型化及低成本化等问题，达到提高耐久性及安全性、低成本化、防止耐久性低下的效果

Active Publication Date: 2009-07-01
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is impossible to reduce the size and cost of vehicle lamps by increasing the number of LEDs or using a heat transfer device.

Method used

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  • Lighting controller of lighting device for vehicle
  • Lighting controller of lighting device for vehicle
  • Lighting controller of lighting device for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0097] Next, regarding the lighting control device for a vehicle lamp according to the first embodiment of the present invention, refer to figure 1 Be explained. figure 1 The configuration of the lighting control device for a vehicle lamp according to the present invention is shown.

[0098] The lighting control device 1 for a vehicle lamp includes: a single switching regulator 10; LEDs 40-1 to 40-N as semiconductor light sources; current drive units 30-1 to 30-N as current drive means; circuit 25; temperature detector 23.

[0099] The switching regulator 10 includes: capacitors C1 , C2 ; a transformer T; a parasitic diode D1 ; an NMOS transistor 11 ; and a switching regulator control circuit 18 . Both ends of the capacitor C1 are connected to power input terminals 15 and 16 , respectively, and both ends of the capacitor C2 are connected to output terminals 19 and 20 , respectively. The power input terminal 15 is connected to the positive terminal of the vehicle battery 13 ...

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PUM

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Abstract

A lighting controller of a lighting device for a vehicle includes M (M is an integer of one or more) switching regulators for supplying driving currents to first to Nth (N is an integer of one or more) semiconductor light sources; first to Nth current driving portions; a temperature detector; and a control circuit. The first to Nth current driving portions include first to Nth current detecting portions connected to the semiconductor light sources and serving to detect the driving currents respectively; and first to Nth switching portions connected to the semiconductor light sources respectively. The first to Nth current driving portions operates the switching portions corresponding to magnitudes of the driving currents detected by the current detecting portions respectively. The temperature detector detects a temperature and sends a temperature detecting signal when the detected temperature is equal to or higher than a pre-specified temperature. The control circuit controls the current driving means in order to decrease the driving currents to be supplied to the semiconductor light sources upon receipt of the temperature detecting signal. The control circuit sets a priority of each of the semiconductor light sources for decreasing the driving current and decreases the driving current in order from the semiconductor light source having a highest priority.

Description

technical field [0001] The present invention relates to a lighting control device for a vehicle lamp and a lighting control method thereof, and more specifically, to a lighting control device for a vehicle lighting device and a lighting control method thereof for controlling the lighting of a semiconductor light source composed of a semiconductor light emitting element. . Background technique [0002] Conventionally, as a vehicle lamp, it is known to use a semiconductor light emitting element such as a light emitting diode (Light Emitting Diode, hereinafter abbreviated as "LED") as a semiconductor light source. Lighting control device for lighting. [0003] Some of the above lighting control devices include a single switching regulator, a plurality of current drive units, and a control unit (for example, refer to Patent Document 1). [0004] A single switching regulator includes a transformer, a capacitor, a diode, an N-channel metal oxide semiconductor (Negative Channel M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02G05F1/46F21V29/00B60Q1/00H01L33/00F21W101/02F21Y101/02H05B44/00F21W107/10
CPCH05B33/089H05B33/0854B60Q11/00H05B45/18H05B45/56B60Q1/00
Inventor 北河孝悦中村则之伊藤昌康
Owner KOITO MFG CO LTD
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