公开(公告)号：US4820933A

公开(公告)日：1989-04-11

申请号：US139736

申请日：1987-12-30

申请人： Suk-Kwon Hong ,  Ho-Yol Bang ,  Hyun-Jun Shin

发明人： Suk-Kwon Hong ,  Ho-Yol Bang ,  Hyun-Jun Shin

IPC分类号： G02F1/133 ,  B60R1/04 ,  B60R1/08 ,  G02F1/13 ,  G09G3/18

CPC分类号： B60R1/088

摘要： A circuit for controlling a liquid crystal rear-vision mirror is disclosed. The liquid crystal rear-vision mirror is equipped in an automobile to sense the amount of lights incident upon the mirror itself from a headlight of another automobile following behind. When the level of incident lights goes higher than a pre-determined level, the circuit generates a pulse signal of a fixed period to make the liquid crystal shutter properly function so that the amount of said incident light reflecting from the mirror to the driver will be decreased to a level adequate to secure driving safety.

摘要翻译： 公开了一种用于控制液晶后视镜的电路。 液晶后视镜配备在汽车中，以从后面的另一辆汽车的前灯感测入射在镜子本身上的光量。 当入射光的电平高于预定电平时，电路产生固定周期的脉冲信号，以使液晶快门适当地起作用，使得从反射镜向驾驶员反射的入射光的量将为 降低到足以确保驾驶安全的水平。