Car side video assist system activated by light signal

A car side video assist system activated by light signals comprising:

• at least two car side cameras, an activation signal source, a video signal source switch processor, and a display device;
• wherein the car side cameras include at least one left side camera disposed on the left side of a car and at least one right side camera arranged at the right side of the car, for respectively capturing an image on the left side and an image on the right side of the car to form corresponding image signal sources that are output to the video signal source switch processor;
• the activation signal source comprising a left turn signal, a right turn signal or a warning signal defined by a substantially contemporaneous activation of both of the left and the right turn signals, the activation signal source outputting a light signal corresponding to a selected one of the left turn signal, the right turn signal or the warning signal;
• the light signal being sent to the video signal source switch processor by a connecting wire;
• the video signal source switch processor generating a camera power activation signal responsive to the light signal from the activation signal source to correspondingly select and activate the left side camera, the right side camera, or a combination thereof for capturing at least one image of the corresponding selected car side where the camera is located;
• the image captured at the corresponding car side is output to form at least one car side picture on the screen of the display device;
• the video signal source switch processor further includes a light signal interpretation processor, the light signal interpretation processor is configured to interpret whether the activated light signal is one of the left turn signal, the right turn signal or the warning signal, wherein the light signal interpretation processor initiates interpretation of the light signal after a preset critical time period defining a first time interval, the light signal interpretation processor continues the interpretation for a preset interpretation time period defining a second time interval, and then outputs an interpretation result to select and activate at least one camera upon completion of the preset interpretation time period, the light signal interpretation processor being configured to:
• (1) interpret any light signal detected with a signal duration less than the preset critical time period as no signal, (2) interpret the activation of left or right signals corresponding to detection of the left or right signals, respectively, within the preset interpretation time period or second time interval, and (3) interpret the warning signal corresponding to detection of both the left and the right signals within the preset interpretation time period or second time interval.