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Light source control device

A light source control and light source technology, applied in the direction of light source, electric light source, lighting device, etc., can solve problems such as broken wires, complicated wiring around LEDs, poor conduction, etc.

Active Publication Date: 2015-09-09
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the case of using the bypass method described in Patent Document 1, the wiring around the LED is complicated
If the wiring is complicated, there is a problem that the possibility of poor conduction such as poor contact or disconnection increases.

Method used

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Examples

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Embodiment Construction

[0029] Hereinafter, the same or equivalent constituent elements, components, and signals shown in the respective drawings are assigned the same reference numerals and redundant descriptions are appropriately omitted. In addition, in each drawing, a part of members that are not important for the description will be omitted and shown. In addition, the symbols attached to voltage, current, resistance, etc. are sometimes used to indicate each voltage value, current value, or resistance value as necessary.

[0030] In this specification, the so-called "the state in which part A is connected to part B" includes not only the case where part A and part B are physically connected directly, but also the case where part A and part B are connected via other means that will not affect the electrical connection state. The case of indirect connection of components. Similarly, the so-called "a state in which part C is placed between part A and part B" includes, in addition to the case where ...

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PUM

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Abstract

A light source control device comprises a first bypass switch connected in parallel to one part of semiconductor light sources, and a second bypass switch connected in series to the first bypass switch and in parallel to another part of the semiconductor light sources. In a connection line connecting a connection node between the first and the second bypass switches and a connection node between the one part and the another part of the semiconductor light sources, a polarity of a current flowing in the connection line when the first bypass switch is off and the second bypass switch is on is opposite to a polarity of the current flowing in the connection line when the first bypass switch is on and the second bypass switch is off. When a poor continuity is generated in the connection line, the first and the second bypass switches are forcedly turned on.

Description

[0001] This application is a divisional application based on the Chinese National Application No. 201310216840.7 (light source control device) filed on June 3, 2013, the content of which is quoted below. technical field [0002] The invention relates to a light source control device for controlling a light source. Background technique [0003] In recent years, semiconductor light sources such as LEDs (Light Emitting Diodes) that have a longer service life and lower power consumption have replaced conventional halogen lamps with filaments in vehicle lamps such as headlights. The degree of light emission of an LED, that is, the brightness, is related to the magnitude of current flowing through the LED. Therefore, when an LED is used as a light source, a lighting circuit for adjusting the current flowing through the LED is required. [0004] In Patent Document 1, the present applicant proposes a technology in which an LED matrix is ​​used as a light source and each LED is turne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/083H05B33/089H05B45/48H05B45/54
Inventor 村松隆雄武田仁志伊藤昌康村上健太郎
Owner KOITO MFG CO LTD