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Electronic timepiece

An electronic watch and stepper motor technology, applied in the field of electronic watches, can solve problems such as increased power consumption

Active Publication Date: 2011-10-12
CASIO COMPUTER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, if the position detection of the pointer is continuously performed from the detection of the stop of the pointer to the detection of the next rotation of the pointer while supplying the drive pulse to the stepping motor, the output of the drive pulse and the position detection of the pointer have no effect. land use many times, resulting in a significant increase in power consumption

Method used

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  • Electronic timepiece
  • Electronic timepiece
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Examples

Experimental program
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Embodiment Construction

[0027] Hereinafter, referring to the drawings, embodiments of the present invention will be described.

[0028] figure 1 is a block diagram of an entire electronic watch showing an embodiment of the present invention, figure 2 It is a schematic diagram showing the counter and the data storage unit formed on the RAM of the embodiment.

[0029] The electronic watch 1 of the present embodiment rotates the second hand 2, the minute hand 3 and the hour hand 4 (see Figure 8A ) to display the time. Such as figure 1 As shown, the electronic watch 1 includes: a central processing unit (CPU) 11, which performs overall control on the clock 1; an analog block 19, which includes a plurality of pointers (second hand 2, minute hand 3 and clock 4) and drives these pointers 2, 3 and 4 to rotate them; a photodetector 20, which performs position detection of the second hand 2; a read only memory (ROM) 12, which stores a control program and control data executed by the CPU 11; a random acce...

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PUM

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Abstract

Disclosed is an electronic timepiece, comprising: hands which indicate time to display the time; a stepping motor which performs a stepping drive of the hands; a drive control section which supplies the stepping motor with drive pulses; a hand movement examining section which examines whether the hands are moving or not; and awaiting control section which temporarily interrupts a supply of the drive pulses by the drive control section to be in a waiting state, when the hand movement examining section judges that the hands are stopped, wherein the supply of the drive pulses by the drive control section and an examination of whether the hands are moving or not by the hand movement examining section are respectively restarted, after the waiting control section has released the waiting state.

Description

technical field [0001] The invention relates to an electronic watch which uses a pointer to display time and is equipped with a pointer position detection mechanism. Background technique [0002] In an electronic watch whose pointer is driven by a stepping motor, for example, if a strong magnet is located near the electronic watch, the rotor of the stepping motor sometimes does not rotate although a driving pulse is supplied, resulting in failure to drive the pointer. [0003] Conventionally, there has been proposed an electronic watch equipped with a function of detecting the position of its hands (see, for example, Japanese Patent Application Laid-Open No. 2009-085674) by forming a penetration hole (penetration hole) in each gear that rotates in cooperation with the hands, respectively. ), and the penetration hole is set to appear at the detection position when the pointer is at a predetermined position, so that the penetration hole is detected with a photochopper or the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04C3/14
CPCG04C3/143
Inventor 青木信裕
Owner CASIO COMPUTER CO LTD