Seiko Instruments Inc

Tamotsu Maesawa

Kenji Ogasawara

Akira Takakura

Kazuhiro Koyama

Kazumi Sakumoto

Tomohiro Ihashi

Kosuke Yamamoto

Ayumi Matsumoto

Dai Terasawa

Teruo Kato

Hideki Okuda

Yasunori Hara

Keisuke Tsubata

Tetsuya Nobe

Takayuki Nomura

Provided is a communication system that includes an electronic timepiece and a communication apparatus, in which, when the electronic-timepiece communication unit demands a communication connection to the communication apparatus, the communication-apparatus control unit inquires whether or not the electronic timepiece is included in the connection approval list that is stored in the communication-apparatus storage unit, in which, in a case where the electronic timepiece is included in the connection approval list, the communication-apparatus communication unit establishes a communication connection to the electronic timepiece and performs data communication through which at least clock time data is sent to the electronic timepiece, and in which, in a case where the electronic timepiece is not included in the connection approval list, the communication-apparatus communication unit does not establish the communication connection to the electronic timepiece.

Communication system, communication method, electronic timepiece, and communication apparatus

There is provided a timepiece including a high-load rotation position detection unit that detects a high-load rotation position that is a rotation position of a wheel when a rotational load of a rotor that transmits rotor's rotation to the wheel and rotates a pointer clockwise is greater than that during normal hand movement and a drive signal output unit that outputs a sub-drive signal having energy greater than that of a main drive signal that is output during the normal hand movement and less than that of an auxiliary drive signal that is output when the rotor does not rotate by the main drive signal in a case where the rotation position of the wheel is the high-load rotation position.

Timepiece and timepiece motor control method

A portable timepiece includes a case, a power receiving coil accommodated in the case, a bypass member configured to include a soft magnetic material, and a first band that is internally equipped with the bypass member, and that is transformable so as to dispose the bypass member between the power receiving coil and a charging device when charging is performed using the charging device.

Portable device and portable timepiece

A proposed electronic apparatus is capable of charging a secondary battery and performing data communication using a solar cell while suppressing effects of ambient light even when the intensity of light radiated to the solar cell is low. The electronic apparatus includes a control circuitand a resistance. The control circuitreceives data based on an output voltage of a solar cell. The resistanceis connected between electrodes of the solar cell. The control circuitcontrols a resistance value of the resistancebased on whether during an operation of receiving data or not.

Electronic apparatus and control method

A portable timepiece includes a case, a power receiving coil accommodated on a rear surface side in the case, a bypass member configured to include a soft magnetic material, and a first band that is attached to the case, that is internally equipped with the bypass member, and that enables the bypass member to be disposed between the power receiving coil and a charging device when charging is performed using the charging device.

An electronic device includes at least an acquisition unit, an input unit, a time correction amount calculation unit, and a transmitting unit. A timepiece includes at least a receiving unit, a power storage unit, a drive unit, and a control unit. The input unit receives an input of the time displayed by the display unit of the timepiece. The time correction amount calculation unit calculates a time correction amount for correcting the time of the timepiece from a difference between the time, the input of which is received by the input unit and the current time acquired by the acquisition unit. The transmitting unit transmits the time correction amount to the timepiece by using light. The receiving unit receives the time correction amount. The power storage unit stores electricity by using power converted from the light. The drive unit drives the indicating hand. The control unit corrects the time displayed by the indicating hand, based on the time correction amount received by the receiving unit. The control unit controls a power storage period in the power storage unit and a receiving period in the receiving unit so as to receive the time correction amount in the receiving period.

Time correction system, electronic device, timepiece, and program

An electronic device includes a solar cell, a secondary battery that is charged by the solar cell, and a control circuit that switches between a charging period during which the charging of the secondary battery from the solar cell is performed and a communication period during which an optical signal is received by the solar cell. The optical signal includes a synchronization signal indicating the transmission of data and the data, and the communication period is configured to detect the synchronization signal. The control circuit extends the communication period to enable the solar cell to receive the whole data included in the optical signal.

Electronic device, communication system, and method of controlling electronic device

An electronic device includes a display part having a light source which transmits an optical signal, a direction detection part for detecting a direction of orientation of a display screen of the display part, and a controller for transmitting data by the optical signal from the display part to an electronic timepiece when the direction of orientation of the display screen detected by the detection part faces a predetermined direction.

Electronic device, communication method and recording medium

A time correction system includes a timepiece, and an electronic device that corrects the time of the timepiece. The electronic device includes a display unit, a time data acquisition unit, a control unit that causes the display unit to display an instruction time of the electronic timepiece, based on the current time, and that calculates a time correction amount from a difference between the current time and the instruction time, and a light source that transmits the time correction amount to the electronic timepiece. The electronic timepiece includes an input unit that receives an operation input for correcting the time displayed by a display unit, a solar cell that receives the time correction amount from the electronic device, and a control circuit that corrects the time displayed by an indicating hand of the display unit, based on the time correction amount.

An electronic timepiece includes a solar power source, a voltage stabilizer circuit that generates a constant voltage by using power supplied from the solar power source, and a control circuit that clocks the time by driving a rotating body at first hand operation speed and at second hand operation speed which is faster than the first hand operation speed. The control circuit selects a voltage of the solar power source so as to drive the rotating body in a case of the first hand operation speed, and selects at least any one voltage of the constant voltage and the voltage of the solar power source so as to drive the rotating body in a case of the second hand operation speed.

Growing community of inventors

Chiba, Japan

Tamotsu Maesawa