Patent ID: 8934321
Filing Date: 2015-01-13
Classification: G04C

Abstract:
1. An analog quartz timepiece, comprising: a housing; one or more hands continuously rotating around a dial placed within the housing, the dial having sixty evenly spaced minute and/or second indicator marks thereon; a drive movement comprising gears and drive motors associated with the hands for timekeeping; a position sensor comprising a light transmitter and a light receiver which are positioned to define a reflective area bound by an angle range of +/−6 degrees to cover consecutive three minute or second indicator marks on the dial, said three minute or second indicator marks corresponding to start point, middle point and end point where the hands pass through the reflective area, where the light transmitter transmits a beam of light to any one of the hands passing through the reflective area and the light receiver receives the light reflected from the passing hand, wherein the start point is a point where the hand comes into the reflective area, the end point is a point where the hand comes out of the reflective area, and the middle point is a halfway point between the start point and the end point in the reflective area; and a processor connected to said drive movement and said position sensor, said processor being programmed to determine a position of the passing hand in the reflective area in correspondence to the reflection of the light from the hand, and to drive the movement to move the hand to a correct time position responsive to the determined position, and wherein the position of the passing hand is determined according to the following equations: wherein, Ts=the time at the start point where the hand comes into the reflective area; and