Abstract: A first driving signal is supplied to a first electrode of a vibrating body. A second driving signal is supplied to a second electrode of the vibrating body. A common driving signal is supplied to a common electrode of the vibrating body. A phase of the first driving signal is set changeable with respect to a phase of the common driving signal. A phase of the second driving signal is set changeable with respect to the phase of the common driving signal. Then, it is possible to switch a driving direction of a piezoelectric motor according to which phase of the first driving signal or the second driving signal is varied from the phase of the common driving signal. If the phase is simply changed, a switch is unnecessary. It is possible to reduce a driving circuit in size.

Abstract: A piezoelectric actuator includes a vibrating body including a piezoelectric device; a driving circuit that supplies a driving signal to the piezoelectric device; a phase difference detecting circuit that detects a phase difference between the driving signal and a detection signal detected based on vibration of the vibrating body; and a frequency controller that controls the frequency and power of the driving signal, wherein the frequency controller sets the power to an upper limit voltage value when the frequency is changed so that the phase difference falls within a predetermined range and sets the voltage to a lower limit voltage value smaller than the upper limit voltage value when the phase difference is outside the predetermined range.

Abstract: A pulse detector that detects a pulse signal originating from the pulse of a human body includes: a pulse wave sensor that detects and outputs a first pulse wave signal in which the pulse signal and a noise signal are mixed; and a first filtering unit that generates an adaptive spectral line enhancer based on the first pulse wave signal, divides the first pulse wave signal into a first signal and a second signal, and outputs a second pulse wave signal including at least the first signal.

Abstract: A first driving signal is supplied to a first electrode of a vibrating body. A second driving signal is supplied to a second electrode of the vibrating body. A common driving signal is supplied to a common electrode of the vibrating body. A phase of the first driving signal is set changeable with respect to a phase of the common driving signal. A phase of the second driving signal is set changeable with respect to the phase of the common driving signal. Then, it is possible to switch a driving direction of a piezoelectric motor according to which phase of the first driving signal or the second driving signal is varied from the phase of the common driving signal. If the phase is simply changed, a switch is unnecessary. It is possible to reduce a driving circuit in size.

Abstract: A drive device includes a movable member, plural piezoelectric motors that cause the movable member to move in a predetermined direction, a drive circuit that drives the plural piezoelectric motors, and plural relays that electrically connect or disconnect at least one of the plural piezoelectric motors to or from the drive circuit.

Abstract: A piezoelectric actuator includes a frequency controller that controls the frequency and power of the driving signal, wherein when the phase difference falls within a predetermined range, the control unit stores the value of the frequency of the driving signal as a first frequency memory value, sets a voltage to a upper limit voltage value, and performs control of adjusting the frequency of the driving signal so that the phase difference is maintained to be within a predetermined range, and when the frequency of the driving signal is changed from the first frequency memory value by an amount exceeding a first value determined in advance, the control unit stores the value of the frequency of the driving signal as a second frequency memory value and sets the voltage to a lower limit voltage value lower than the upper limit voltage value.

Abstract: A drive device includes plural moving portions, piezoelectric motors that move the moving portions, at least one drive circuit that drives the piezoelectric motors, and a connection/disconnection portion that connects and disconnects the piezoelectric motors and the drive circuit. The number of drive circuits is fewer than the number of piezoelectric motors.

Abstract: A piezoelectric actuator includes a frequency controller that controls the frequency and power of the driving signal, wherein when the phase difference falls within a predetermined range, the control unit stores the value of the frequency of the driving signal as a first frequency memory value, sets a voltage to a upper limit voltage value, and performs control of adjusting the frequency of the driving signal so that the phase difference is maintained to be within a predetermined range, and when the frequency of the driving signal is changed from the first frequency memory value by an amount exceeding a first value determined in advance, the control unit stores the value of the frequency of the driving signal as a second frequency memory value and sets the voltage to a lower limit voltage value lower than the upper limit voltage value.

Abstract: A beat detection device includes: a pulse wave sensor adapted to detect and output a pulse wave signal; a body motion sensor adapted to detect and output a body motion signal due to a body motion of a human body; a pulse wave signal filtering section adapted to generate an adaptive filter based on the body motion signal to extract a noise signal in the pulse wave signal, and to output a beat signal obtained by eliminating the noise signal from the pulse wave signal; and a filter coefficient setting section adapted to set a coefficient of the adaptive filter to be a predetermined value in response to detection of increase in a body motion change beyond a predetermined threshold value based on the body motion signal.

Abstract: A piezoelectric actuator includes a vibrating body including a piezoelectric device; a driving circuit that supplies a driving signal to the piezoelectric device; a phase difference detecting circuit that detects a phase difference between the driving signal and a detection signal detected based on vibration of the vibrating body; and a frequency controller that controls the frequency and power of the driving signal, wherein the frequency controller sets the power to an upper limit voltage value when the frequency is changed so that the phase difference falls within a predetermined range and sets the voltage to a lower limit voltage value smaller than the upper limit voltage value when the phase difference is outside the predetermined range.

Abstract: A piezoelectric actuator includes a frequency controller that controls the frequency and power of the driving signal, wherein when the phase difference falls within a predetermined range, the control unit stores the value of the frequency of the driving signal as a first frequency memory value, sets a voltage to a upper limit voltage value, and performs control of adjusting the frequency of the driving signal so that the phase difference is maintained to be within a predetermined range, and when the frequency of the driving signal is changed from the first frequency memory value by an amount exceeding a first value determined in advance, the control unit stores the value of the frequency of the driving signal as a second frequency memory value and sets the voltage to a lower limit voltage value lower than the upper limit voltage value.

Abstract: An electronic device includes a timer which measures a current time, a display which displays information based on the time, a receiver which, by receiving and decoding a signal, including time information indicating a standard time, which is encoded by means of a predetermined communication system, acquires the time information, and a controller which, as well as instructing the receiver to acquire the time information, corrects a deviation of the measured time, based on the time information, and instructs the display to display information based on the corrected time. The controller gives an instruction in such a way that no time period occurs in which both the receiver's operation of acquiring the time information, and the display's operation of displaying the information based on the corrected time, are executed.

Abstract: A pulse detector that detects a pulse signal originating from the pulse of a human body includes: a pulse wave sensor that detects and outputs a first pulse wave signal in which the pulse signal and a noise signal are mixed; and a first filtering unit that generates an adaptive spectral line enhancer based on the first pulse wave signal, divides the first pulse wave signal into a first signal and a second signal, and outputs a second pulse wave signal including at least the first signal.

Abstract: A PDP apparatus has a plurality of address driving modules (ADMs) connecting a PDP, a chassis, PDP address electrodes with an address driving circuit of the chassis side. The ADM has a flexible substrate on which wiring and a driver IC are mounted and an address substrate formed by a metal plate for holding/fixing the flexible substrate. With respect to a bracket of an attachment part of the chassis, the two adjacent ADMs are positioned by positioning pins and elongated holes at both ends of the address substrates, and attached and held/fixed by common fastening using a female screw portion, chipped portions, and a screw part. Reduction in the number of required parts and work man-hours, stable holding/fixing, etc. are realized in a driver module of a PDP apparatus.

Abstract: A time adjustment device has a reception unit that receives a prescribed signal containing time information transmitted by a base station, a display time information adjustment unit that adjusts the time information displayed by a time information display unit based on the time information, a base station identification information acquisition unit that gets base station identification information contained in the prescribed signal, and a time adjustment execution determination unit that decides based on the base station identification information whether the display time information adjustment unit adjusts the displayed time information using the time information from the prescribed signal.

Abstract: An electronic device includes a timer which measures a current time, a display which displays information based on the time, a receiver which, by receiving and decoding a signal, including time information indicating a standard time, which is encoded by means of a predetermined communication system, acquires the time information, and a controller which, as well as instructing the receiver to acquire the time information, corrects a deviation of the measured time, based on the time information, and instructs the display to display information based on the corrected time. The controller gives an instruction in such a way that no time period occurs in which both the receiver's operation of acquiring the time information, and the display's operation of displaying the information based on the corrected time, are executed.

Abstract: A time adjustment device has a reception unit that receives a prescribed signal containing time information transmitted by a base station, a display time information adjustment unit that adjusts the time information displayed by a time information display unit based on the time information, and a time information extraction signal supply unit that supplies only a time information extraction signal, and the time information is extracted from the prescribed signal using the time information extraction signal.

Abstract: A beat detection device includes: a pulse wave sensor adapted to detect and output a pulse wave signal; a body motion sensor adapted to detect and output a body motion signal due to a body motion of a human body; a pulse wave signal filtering section adapted to generate an adaptive filter based on the body motion signal to extract a noise signal in the pulse wave signal, and to output a beat signal obtained by eliminating the noise signal from the pulse wave signal; and a filter coefficient setting section adapted to set a coefficient of the adaptive filter to be a predetermined value in response to detection of increase in a body motion change beyond a predetermined threshold value based on the body motion signal.

Abstract: An electronic device includes a timer which measures a current time, a display which displays information based on the time, a receiver which, by receiving and decoding a signal, including time information indicating a standard time, which is encoded by means of a predetermined communication system, acquires the time information, and a controller which, as well as instructing the receiver to acquire the time information, corrects a deviation of the measured time, based on the time information, and instructs the display to display information based on the corrected time. The controller gives an instruction in such a way that no time period occurs in which both the receiver's operation of acquiring the time information, and the display's operation of displaying the information based on the corrected time, are executed.

Abstract: A time correction device has a reception unit that receives satellite signals transmitted from positioning information satellites orbiting the Earth; a time correction information storage unit that stores time correction information for correcting time information produced by a time information generating unit; and a time information correction unit for correcting the time information based on the time correction information. The satellite signals are transmitted by individual positioning information satellites, and contain a time-related information part denoting time-related information that is kept by each satellite, and a satellite information part denoting satellite information other than the time-related information. The time correction information is generated based on the time-related information.