Patent ID: 8033238

Claim:
An indicator display device, comprising: a stepping motor; an indicator which is connected to the stepping motor and rotates by a driving force provided by the stepping motor; an indicator position detector which detects a relative position of the indicator with regard to the stepping motor; a gear which is combined with the stepping motor and outputs the driving force generated by the stepping motor; and a gear blade which is formed at a side of the gear so as to engage with the gear, and rotates together with the gear when the gear rotates; wherein: the indicator is combined with the gear blade and rotates together with the gear blade; the gear blade comprises a protrusion having a radius which is larger than a radius of a remaining portion of the gear blade; the indicator position detector detects a position of the protrusion; and when the indicator display device is turned on, the stepping motor is rotated until the position of the protrusion starts to be detected by the indicator position detector.