Title:
点灯制御装置
Document Type and Number:
Japanese Patent JP5244447
Kind Code:
B2
Abstract:
A lighting control device includes a current driving portion for DC-controlling or PWM-controlling an LED unit, and a disconnection detection portion for detecting disconnection of the LED unit. The disconnection detection portion has a latch circuit and a reset portion. The latch circuit provides a disconnection detection signal after it is detected that disconnection has occurred for a prescribed time. The reset portion resets the disconnection detection signal based on prescribed conditions.
Inventors:
Kotaro Matsui
Takayoshi Kitagawa
Takao Sugiyama
Takayoshi Kitagawa
Takao Sugiyama
Application Number:
JP2008117190A
Publication Date:
July 24, 2013
Filing Date:
April 28, 2008
Export Citation:
Assignee:
Koito Manufacturing Co., Ltd.
International Classes:
H05B37/02; H01L33/00
Domestic Patent References:
| JP2002299081A | ||||
| JP2003317978A | ||||
| JP58122236A |
Attorney, Agent or Firm:
Masanobu Iwata
Hiroshi Suda
Hiroshi Suda