Analog electronic watch

Abstract

An analo electronic watch is comprised of a display unit (2) for displaying a time by its hands, a step motor (3) for driving the hands, a motor driving unit (4) for controlling and driving the step motor at a prescribed hand driving interval in an ordinary case, a hand position detecting means for detecting positions of the hands, a hand position detecting means control unit (6) for intermittently controlling and driving the hand position detecting means (5) at a first detecting period, which is longer than the hand driving period, and a detecting period changing unit (7) for instructing thehand position detecting means (5) of changing the detecting period. When the detecting period changing unit (7) detects a detecting period changing condition, while the hand driving period for the step motor (3) is maintained, the detecting period changing unit (7) changes the hand position detecting period of the hand position detecting means (5) from the first detecting period to a second detecting period.

Description

technical field [0001] The present invention relates to an analog electronic watch capable of detecting the deviation of the pointer position and automatically correcting the displayed time (hand position) even when the displayed time (hand position) is deviated due to the influence of impact or external magnetic force. [0002] (Claim of Priority) [0003] This application claims priority based on Patent Application No. 2006-057589 filed with Japan Patent Office on March 3, 2006, and the contents thereof are incorporated herein. Background technique [0004] For an analog electronic watch such as a wristwatch, the current time can be confirmed by the rotational positions of the hour hand, that is, the hour hand, the minute hand, and the second hand. However, when such an analog electronic watch receives an impact, for example, the stepping motor, which is the driving motor inside, does not rotate at a constant step but rotates in a certain direction with multiple steps. ,...

AI Technical Summary

Problems solved by technology

Therefore, in consideration of the influence of the rotor vibration of the motor (stepping motor) and the stability of the optical sensor, in order to detect the pointer position with high precision, the fast forward speed of the motor (stepping motor) cannot be increased.

[0012] In addition, as the main factors of the pointer position deviation of the analog electronic watch, the above-mentioned impact, external magnetic force, surrounding environment (temperature, humidity) state, surrounding pressure (water pressure, air pressure) state, heavy load, When the power supply is equipped with a solar battery, the ambient light state, the overcharged state, etc., but the invention described in the above-mentioned Patent Document 1 does not have a sensor for detecting the main factors of these hand position deviations, so the main cause of these hand position deviations is generated from the clock. It takes time from the start of one of the factors until the pointer position deviation is detected

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