US 5,331,214 A · Load control device having abnormal condition detecting for serial signal line, transmitter and receiver

Abstract

In a load control device of the present invention, an operation signal provided by any one of a group of input switches in an operation input section is converted into a serial signal by a signal transmitting section, and the serial signal is applied through a serial signal line to a signal receiving section. In response to the serial signal, the signal receiving section outputs a response signal for driving a load, or a headlamp or a running light. When no response signal is provided, a NAND circuit applies a signal to an automatic lamp control section to automatically control the lighting of the lamp. That is, when the signal transmitting and receiving system becomes out of order, the lighting of the lamps is automatically controlled, which eliminates difficulties encountered when a vehicle is run during night.

Claims15

Dependent claims

A load control device comprising:

an operation input section provided with a plurality of input switches;
signal transmitting means for outputting an operation signal provided in response to an operation of said operation input section through a serial signal line;
sensor means for outputting a detecting signal in accordance with external conditions;
signal receiving and control means including a control section for outputting a control signal in response to at least one signal of the group consisting of (1) a signal derived from said operation signal and (2) said detecting signal, said signal receiving and control means including a signal receiving section responding to an abnormal condition of said signal transmitting means or said serial signal line or to an abnormal internal condition to yield an abnormal signal as said derived signal;
and
load controlling means for controlling a load in accordance with said control signal of said control means.

3 more elements

Dependencies are inferred from the claim text.

Load control device having abnormal condition detecting for serial signal line, transmitter and receiver

Life of this patent

Load control device having abnormal condition detecting for serial signal line, transmitter and receiver

Life of this patent

Abstract

Claims15