Auto Sun Visor

Thread Starter

tonyt

Joined Jan 15, 2012
2
I have an idea for a sun visor that only blocks the area of the visor where the sun is located so that the rest of the visor area would allow visibility. Would this be useful?
 

crutschow

Joined Mar 14, 2008
23,312
Perhaps, but how would you locate where the sun is in relation to the drivers eyes, which is what you need to do?
 

Thread Starter

tonyt

Joined Jan 15, 2012
2
Perhaps, but how would you locate where the sun is in relation to the drivers eyes, which is what you need to do?
I was thinking of an array of phototransistors which have a directional response characteristic so that the one pointed most directly at the sun would have the greatest response. These phototransistors would correspond to a similar array of smart film segments on the sun visor, and the transistor receiving the maximum brightness would make the corresponding smart film segment opaque. The trick as you indicated is how to calibrate the transistor array to match the position of the driver's eyes!
 
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