Seiko Epson Corporation

Mikio Nagahara

Shinichi Mitsunaga

Naoki Gobara

Shunichi Mizuochi

Ikumi Watanabe

Akifumi Hayashi

Tomoyuki Kurata

Hiroshi Kaiho

Hideo Sasahara

Hiroshi Uozumi

Shigeru Imafuku

Satoshi Jobetto

Maho Terashima

Ryota Hirakawa

A service printer includes a printer printing unit that executes a print function, a scanning unit that executes a scan function, a printer communication unit that acquires, from a service providing server that provides a delivery service of delivering ink, status information indicating at least one of the status of a contract for use of the delivery service and the status of payment of the usage fee for the delivery service, and a printer controller that enables or disables execution of the print function and execution of the scan function based on at least one of the contract status and the payment status that are indicated by the status information acquired by the printer communication unit.

Printing apparatus, service providing system, and printing apparatus control method

A service providing server providing a delivery service delivering ink includes an obtaining section configured to obtain first use information associated with use of the delivery service by a first user, a determination section configured to determine a corresponding charge plan which is one of charge plans of the delivery service corresponding to the first use information obtained by the obtaining section based on the first use information obtained by the obtaining section, second use information associated with use of the delivery service by a second user, and a selected charge plan which is one of the charge plans of the delivery service selected by the second user, and a display controller configured to display corresponding charge plan information indicating the corresponding charge plan determined by the determination section in a terminal device of the first user.

Information processing apparatus, service providing system, and method for controlling information processing apparatus

A satellite signal receiver has a positioning error in a range from &#x2212;8 m to +8 m with a probability equal to or more than 95% when positioning in a reception environment with a signal strength equal to or more than &#x2212;135 dBm and average power consumption from start of positioning to first positioning equal to or less than 7 mW.

Satellite signal receiver

An integrated circuit for satellite signal reception includes a position calculation part and has a volume of 9.33 mmor less, and a time from measurement start to initial measurement of 120 seconds or less at a signal intensity of &#x2212;162 dBm or more and &#x2212;160 dBm or less.

Integrated circuit for satellite signal reception

A method of determining adequacy of acquisition includes: attempting to acquire a satellite signal from a satellite and decoding first satellite orbit data; and determining the adequacy of acquisition of the satellite signal by using the first satellite orbit data and second satellite orbit data that has been acquired from the satellite.

Method of determining adequacy and adequacy determining device

A cross correlation determination method includes: executing a first decoding of decoding a navigation message included in a received satellite signal using a first replica code and a second decoding of decoding the navigation message using a second replica code; and determining the occurrence of a cross correlation using the result of the first decoding and the result of the second decoding.

Cross correlation determination method and cross correlation determination device

A bit change determination method includes performing a correlation operation of a signal received from a satellite and a replica code, segmenting the signal using a bit transition timing of navigation message data and performing a first calculation to calculate the result of the correlation operation for a first period having N (N&#x2267;1) continuous unit periods with a bit period of navigation message data as a unit period, performing a second calculation to calculate the result of the correlation operation for a second period having M (M&#x3e;1) continuous unit periods adjacent to the first period, and determining whether a bit value changes or not at a boundary between the first period and the second period using the first and second calculation results.

Bit change determination method and bit change determination device

A position determination method includes: performing a positioning process that calculates a located position by performing positioning calculations using satellite signals; determining whether or not a convergence condition is satisfied based on current and preceding positioning results when the positioning process is performed, the convergence condition being specified as a condition for determining whether or not the positioning results of the repeated positioning processes have converged; and determining the located position calculated by the current positioning process to be an output position when the convergence condition is satisfied.

Position determination method, positioning device, and electronic instrument

An evaluation point E of a present position candidate corresponding to each satellite set is calculated based on an a priori residual (APR) (APR value), a PDOP value, and the number of satellites of the target satellite set according to E=k&#xb7;f(APR)+k&#xb7;f(PDOP)+k&#xb7;f(number of satellites). Evaluation coefficients kto kfor respectively weighting evaluation functions fto fare determined based on an APR average value.

Present position locating method

In the first positioning, a positioning process that calculates the present position based on acquired GPS satellite signals (step A) is performed a plurality of times. A number of times that the difference (position difference) &#x394;P between the calculated present located position and the preceding located position is successively equal to or less than a given value is counted using a position counter, and a number of times that the difference (time difference) &#x394;T between the present time error and the preceding time error is successively equal to or less than a given value is counted using a time counter each time the positioning process is performed (step A). A position threshold value and a time threshold value are determined by changing a reference threshold value by an amount corresponding to an APR average value (step A). When the position count value has reached the position threshold value (step A: YES) and the time count value has reached the time threshold value (step A: YES), the present position is determined to be the first located position and output (step A).

First output position calculation method, storage medium, positioning device, and electronic instrument

A terminal device includes a plurality of search channel sections which search for a positioning satellite, a candidate reception frequency calculation section which calculates a candidate reception frequency of a first acquisition target satellite by causing the search channel sections to perform the correlation accumulation process for a first accumulation time, a candidate frequency confirmation section which confirms reliability of the candidate reception frequency by causing the search channel sections to perform the correlation accumulation process for a second accumulation time longer than the first accumulation time, a final frequency calculation section which calculates a final frequency by causing the search channel sections to perform the correlation accumulation process for a third accumulation time longer than the second accumulation time, and a first difference calculation section which calculates a difference between an estimated synchronization frequency corresponding to each first acquisition target satellite and the final frequency.

Terminal device, positioning method, and recording medium

Estimation calculations for calculating an estimated present position are performed twice corresponding to each satellite set. The estimated present position calculated by the second estimation calculations is determined to be a present position candidate corresponding to the target satellite set. In the first estimation calculations corresponding to the first satellite set, the calculated satellite position and estimated pseudo-range of each GPS satellite are stored in caches. In the second estimation calculations, the satellite position of each GPS satellite is read from the cache. In the first estimation calculations corresponding to the second or subsequent satellite set, the satellite position and the estimated pseudo-range of each GPS satellite are read from the caches, and the satellite position and the estimated pseudo-range of the GPS satellite of which the satellite position and the estimated pseudo-range have not been stored in the caches are calculated and stored in the caches. In the second estimation calculations, the satellite position of each GPS satellite is read from the cache.

Present position locating method, positioning device, and electronic instrument

A positioning method that performs current position calculations and outputs a positioning result position includes searching for satellite signals transmitted from positioning satellites to acquire satellites, combining satellites among the acquired satellites to extract satellite sets used for positioning, performing first positioning calculations on each calculation-target satellite set among the extracted satellite sets using the satellite signals transmitted from the acquired satellites included in the calculation-target satellite set, performing second positioning calculations on each calculation-target satellite set among the extracted satellite sets using the satellite signals transmitted from the acquired satellites that are included in the calculation-target satellite set, but do not include a low-elevation-angle satellite, and determining whether or not a positioning result obtained using the calculation-target satellite set is appropriate based on the difference between a position calculated by the first positioning calculations and a position calculated by the second positioning calculations, the elevation angle of the low-elevation-angle satellite satisfying a given low elevation angle condition, and determining the positioning result position from the positions calculated by the first positioning calculations on the satellite sets for which the positioning result has been determined to be appropriate.

Growing community of inventors

Yamagata-mura, Japan

Mikio Nagahara