STEPPING MOTOR CONTROL CIRCUIT, MOVEMENT AND ANALOG ELECTRONIC CLOCK

Title:

STEPPING MOTOR CONTROL CIRCUIT, MOVEMENT AND ANALOG ELECTRONIC CLOCK

Document Type and Number:

Japanese Patent JP2014181956

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To securely rotate with less energy by carrying out appropriate correction drive when no-rotation is detected or when there is the possibility of erroneous detection of non-rotation despite the fact of rotation.SOLUTION: A stepping motor control circuit comprises, as a correction drive pulse P2, correction drive pulses P2, P2' of two or more types, which are different in energy from each other. When a rotation detection determination circuit 114 detects non-rotation of a stepping motor 109, a control part drives the stepping motor 109 with the first correction drive pulse P2. When the circuit 114 erroneously detects non-rotation although the stepping motor 109 has rotated, the control part drives the stepping motor 109 with the second correction drive pulse P2', which is less in energy than the case where the non-rotation is detected.

Inventors:

YAMAMOTO KOSUKE

Application Number:

JP2013055354A

Publication Date:

September 29, 2014

Filing Date:

March 18, 2013

Export Citation:

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Assignee:

SEIKO INSTR INC

International Classes:

G04C3/14; H02P8/02

Attorney, Agent or Firm:

Kentaro Kuhara
Noriaki Uchino
Nobuyuki Kimura

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