Patent ID: 7579795

Claim:
A driving control device for a brushless motor having a rotor and a plurality of coils with different phases, the driving control device comprising: a detection target configured to rotate in synchronization with rotation of the rotor, the detection target having formed thereon a pattern representing modulation information; a detector configured to read the pattern and to output modulated output signals; a demodulator configured to demodulate the modulated output signals and to obtain demodulated information; a controller configured to control rotation of the rotor on the basis of at least the demodulated information obtained by the demodulator; and an output-signal-information detector configured to detect output-signal information regarding the modulated output signals, wherein the controller detects an absolute angle of the rotor or positions of magnetic poles of the rotor on the basis of the demodulated information obtained by the demodulator and the output-signal information detected by the output-signal-information detector.