Seiko Epson Corporation

Nippon Antena Kabushiki Kaisha

Teruhiko Fujisawa

Shunsuke Koyama

Hiroyuki Chihara

Katsuyuki Honda

Jun Matsuzaki

Takashi Kawaguchi

Osamu Urano

Shinji Nakamiya

Makoto Okeya

Shuichi Tamura

Fumiaki Miyahara

Isao Oguchi

Osamu Shinkawa

Hiroshi Yabe

Yoshitaka Iijima

Norio Hama

Kenji Iida

Tadashi Aizawa

Hiroyuki Kojima

Joji Kitahara

Akihito Uetake

Koji Kitazawa

Noriaki Shimura

Tadao Kadowaki

Sho Matsuzaki

Koichi Ito

Hideo Fukuchi

Toshihiro Mitani

Akira Washizawa

Takanori Miura

Akio Mamuro

An electronic watch includes a case having electrical conductivity, a cover member attached to the case, a hand, a hand shaft to which the hand is attached, and an antenna disposed to overlap the cover member in plan view from a first direction, the antenna being configured to receive a predetermined radio wave, the cover member is made of a material that shortens a wavelength of the radio wave, the case includes a facing surface facing a side surface of the cover member, the facing surface being located within a predetermined dimension from the side surface, and in the first direction, a height dimension from an end portion of the facing surface positioned farthest from the antenna to a farthest portion of the cover member positioned farthest from the antenna is equal to or greater than 1/60 of the wavelength shortened by the cover member.

Electronic watch having improved antenna function

A radio-controlled timepiece includes a receiver configured to receive satellite radio waves including first time information, a short-range receiver configured to receive radio waves including second time information transmitted from a mobile device, an operating device configured to accept instruction operation, a reception controller configured to selectively execute first reception processing of acquiring the first time information by operating the receiver at a preset time and second reception processing of acquiring the second time information by operating the short-range radio receiver in response to the instruction operation from the operating device, and a time correction controller configured to correct a display time based on the first time information acquired in the first reception processing or the second time information acquired in the second reception processing.

Radio-controlled timepiece, system, and method for controlling radio-controlled timepiece

An electronic watch includes an annular antenna base material including an upper surface, an outer circumferential surface, a bottom surface, and an inner circumferential surface, a first antenna element provided at the outer circumferential surface, and a second antenna element provided at the inner circumferential surface, wherein at least one of the first antenna element and the second antenna element includes a feed terminal coupled to a feed portion, and a distance between the first antenna element and the second antenna element is greater than 0 mm and less than or equal to 2 mm.

Electronic watch

An electronic watch includes a GPS receiver, a first time correction unit configured to correct time using the time information received by the GPS receiver, a beacon receiver configured to receive a beacon signal containing beacon identification information transmitted from a beacon installed indoors, a first storage unit configured to store beacon identification information and time difference information corresponding to the beacon identification information, a second time correction unit configured to correct a time difference using the beacon signal received by the beacon receiver and the time difference information stored in the first storage unit, and a button configured to accept a reception instruction of the beacon signal, which is operated by an operator. The beacon receiver is configured to receive a beacon signal when the button accepts the reception instruction.

Electronic watch and method of correcting time difference

Provided is an electronic timepiece that receives satellite signals more easily when satellite signal is received automatically. The electronic timepiece has a time display that displays time by the position indicated by a rotating first hand; a planar antenna that receives satellite signal transmitted wirelessly from a satellite; a receiver connected to the planar antenna; and a controller that operates the receiver when a specific condition is met. The planar antenna includes a dielectric substrate, and an antenna patch disposed to the substrate. The center of the patch antenna being disposed in the range between 6:00 and 11:00 on the time display.

Electronic timepiece

A thin electronic timepiece can receive satellite signals and standard time signals. An electronic timepiece has a planar antenna for receiving satellite signals, a bar antenna for receiving standard time signals, a time display unit with a plurality of hands, a plurality of motors for driving the hands, a battery, and a timepiece case. In a plan view of the electronic timepiece, the planar antenna, bar antenna, and battery are disposed to positions not mutually superimposed; the plural motors are disposed inside the timepiece case at positions not superimposed in plan view with the planar antenna and bar antenna; and at least one of the plural motors is disposed superimposed in plan view with the battery inside the timepiece case.

An electronic timepiece having a case of which at least part is metal, a magnetic shield, and a planar antenna can suppress a drop in the sensitivity of the planar antenna. The electronic timepiecehas a caseof which at least part is metal, and hands and a movement disposed inside the caseThe movement includes a circuit boarda planar antennaattached to the circuit board, a motor that drives the hands, and magnetic shieldssuperimposed in plan view with at least part of the motor and not superimposed in plan view with the planar antenna. The shortest distance Dbetween the antenna electrodeof the planar antennaand the metal part of the caseis greater than the shortest distance Dbetween the antenna electrodeand the magnetic shield

A timepiece includes a case that is made of a conductive material, a bezel that is made of a nonconductive material, a patch antenna that is disposed inside the case and at the back side of the dial, and a bezel that is made of a ceramic.

Timepiece with internal antenna

An electronic timepiece having a satellite signal receiver; a standard time signal receiver; a storage battery; a voltage detection circuit that detects the remaining capacity of the storage battery; a satellite signal reception controller; and a standard time signal reception controller. The satellite signal reception controller operates the satellite signal receiver when the battery capacity detected by the voltage detection circuit is greater than or equal to a first threshold and the automatic reception condition is met. The standard time signal reception controller operates the standard time signal receiver when the automatic reception condition for the standard time signal is met whether the reserve power is greater than or equal to the first threshold and when the reserve power is less than the first threshold.

Electronic timepiece and control method of an electronic timepiece

An electronic timepiece has a base plate made from a non-conductive material, and a planar antenna disposed on the back side of the base plate. The planar antenna has a dielectric substrate and an antenna electrode disposed to the base plate side of the dielectric substrate. An exposed area not superimposed with the antenna electrodeis formed on the surface of the dielectric substrate. The base plate has a through-hole overlapping at least part of the antenna electrode in plan view, and a cover part overlapping at least part of the exposed surface in plan view.

An electronic timepiece has a time display unit including a dial made from a non-conductive material, and hands; and a movement that drives the hands. The movement includes a circuit board, a planar antenna attached to the circuit board, a stepper motor that drives the hands, and a battery. The planar antenna, the stepper motor, and the battery are disposed to positions overlapping the time display unit in plan view, and not overlapping each other in plan view.

An electronic timepiece has a case; an annular antenna housed in the case; a time display unit that is disposed on the inside of the antenna, and includes a dial and hands that rotate on a center pivot; and a battery compartment housing a storage battery that feeds the antenna. The antenna is not superimposed with the storage battery held in the battery compartment when seen from the direction perpendicular to the dial.

Growing community of inventors

Shiojiri, Japan

Teruhiko Fujisawa