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Analog electronic watch

An electronic watch and stepper motor technology, applied in the field of analog electronic watches, can solve the problem of inability to improve the fast forward speed of the motor, and achieve the effect of low power consumption

Active Publication Date: 2010-08-25
CITIZEN WATCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment approach 1

[0063] FIG. 1 is a block diagram showing the configuration of an analog electronic timepiece according to Embodiment 1 of the present invention. In addition, the analog electronic watch in this embodiment is an example of an analog electronic watch.

[0064] As shown in FIG. 1 , an analog electronic watch (analog electronic watch) 1 according to this embodiment includes, as main components, a display unit 2 provided with pointers, a stepping motor 3 as a pointer driving unit, and a control unit as a pointer driving unit. The motor drive part 4, the pointer position detection unit 5, the pointer position detection unit control part 6, the detection cycle change part 7, the correction amount calculation part 8 as the pointer position correction amount calculation unit, the timing part 9, and the main factor of the pointer position deviation The impact detection part 10 of the detection unit.

[0065] The stepping motor 3 is rotationally controlled based on a drive pulse signal ...

Embodiment approach 2

[0113] 6 is a block diagram showing the configuration of an analog electronic timepiece according to Embodiment 2 of the present invention. The analog electronic timepiece 1 a according to the present embodiment includes an external magnetic force detection unit 11 as means for detecting a factor of hand position deviation. In addition, other configurations are the same as those of Embodiment 1 shown in FIG. 1 , and thus redundant descriptions are omitted.

[0114] In the external magnetic force detection part 11, a rotation detection circuit (not shown) that detects the rotation / non-rotation of the rotation of the rotor based on the induced voltage generated with the rotation of the rotor of the stepping motor 3 is also used to detect magnetic flux from the outside. The magnetic force (magnetic field) of the circuit, and detects the magnetic force (external magnetic force) from the outside to the analog electronic watch 1.

[0115] When there is an electronic instrument (suc...

Embodiment approach 3

[0120] 7 is a block diagram showing the configuration of an analog electronic timepiece according to Embodiment 3 of the present invention. The analog electronic timepiece 1b according to the present embodiment includes a temperature detection unit 12 as means for detecting factors of hand position deviation. In addition, other configurations are the same as those of Embodiment 1 shown in FIG. 1 , and thus redundant descriptions are omitted.

[0121] In the present embodiment, the timekeeping unit 9 includes a rate correction unit (not shown) that corrects the rate of difference with respect to temperature of a crystal oscillator as an oscillation signal source, and the rate corrector has a temperature sensor so that Obtain temperature information for correcting the differential rate. Therefore, the temperature detection unit 12 may also be used as the temperature sensor of the differential correction unit, and a temperature sensor dedicated to the temperature detection unit ...

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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. ,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04C3/00G04C9/08
CPCG04C3/14
Inventor 藤井辉彦北泽勋行川昌昭内田高行莲实隆行池卓丙
Owner CITIZEN WATCH CO LTD
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