In this way, {TAIL ~ the exposure device} of {HEAD ~ the fourth aspect} is provided with the pulse width modulating device of the present invention which enables an improvement in the bit resolution of the pulse width modulating signal 
In this way , { TAIL ~ the exposure device } of { HEAD ~ the fourth aspect } is provided with the pulse width modulating device of the present invention which enables an improvement in the bit resolution of the pulse width modulating signal
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH