An LED control signal calculation section outputs {TAIL ~ a control signal} to LED light sources based on {HEAD ~ a light control value} K1 as the higher one of K0 and Kmin 
An LED control signal calculation section outputs { TAIL ~ a control signal } to LED light sources based on { HEAD ~ a light control value } K1 as the higher one of K0 and Kmin
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH