Patent application number | Description | Published |
20100005890 | METHOD OF DETERMINING PROPAGATION TIME OF ULTRASONIC FROM MOVABLE BODY AND SYSTEM THEREOF - For precisely determining a position of an electronic pen using ultrasonic, only a direct wave arriving first at a reception device is detected without being affected by a reflected wave of an ultrasonic signal to count a propagation time of the electronic pen. | 01-14-2010 |
20100286949 | POSITION DETERMINATION SYSTEM, TRANSMISSION DEVICE AND RECEPTION DEVICE, AND POSITION DETERMINATION METHOD - Positions of a plurality of transmission devices are precisely detected by a direct wave arriving first at a reception device without being affected by other ultrasonic signals from the transmission device. | 11-11-2010 |
20110015880 | ULTRASONIC PROPAGATION TIME MEASUREMENT SYSTEM - High-quality and high-speed electronic pen drawing performance is ensured without being affected by noise of an ultrasonic signal which is generated by an apparatus using ultrasonic such as a motion detector. In an ultrasonic receiver for use in ultrasonic propagation time measurement, an external environment noise is measured to first determine a frequency. Thereafter, centered around the frequency, a band elimination filter having a several kHz band is structured as software to again measure an external environment noise. This sequence is repeated until a signal intensity lowers below a predetermined value. When the signal intensity fails to lower below the predetermined value even after a predetermined number of repetitions of the sequence, a transmission output on the side of an electronic pen as an ultrasonic transmission source is increased or an ultrasonic oscillation frequency is changed. | 01-20-2011 |
20110116345 | POSITION DETECTION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, POSITION DETECTION METHOD AND POSITION DETECTION PROGRAM - To enable precise calculation of a propagation time of a direct wave which arrives the earliest from an ultrasonic emission source without being affected by a reflected wave. A plurality of ultrasonic signals generated based on a plurality of M sequences different from each other are propagated from a transmission side to a reception side, whereby the reception side executes processing of correlation between each model waveform of the plurality of M sequences and a waveform of each ultrasonic signal and detects a subsidiary peak of a correlation value appearing when both waveforms partly coincide with each other to, starting with the smallest one of subsidiary peaks detected by all the correlation processing, determine a plurality of corresponding M sequences. The transmission side selects an M sequence differing in each transmission cycle from among the determined plurality of M sequences and sends out an ultrasonic signal modulated by the selected M sequence and an electromagnetic wave signal to the reception side. The reception side calculates a value of correlation between the ultrasonic signal and a model waveform, detects a first main peak of the calculated correlation value and calculates an ultrasonic propagation time from a time point of the reception of the electromagnetic wave signal and a time point of the detection of the main peak. | 05-19-2011 |
20110223799 | CONTACT - A contact of which the quality of crimping of a crimp portion can be easily and accurately determined. The crimp portion of the contact includes a bottom portion that supports conductors of electrical wires, and two side portions that are continuous with opposite sides of the bottom portion and are bent such that they hold the conductors therein. Three marks are formed in an outer surface of each side portion along a longitudinal direction of the contact. | 09-15-2011 |
20110261654 | OPTIMUM PSEUDO RANDOM SEQUENCE DETERMINING METHOD, POSITION DETECTION SYSTEM, POSITION DETECTION METHOD, TRANSMISSION DEVICE AND RECEPTION DEVICE - To enable precise calculation of a propagation time of a direct wave which arrives fastest from an ultrasonic generation source without being affected by a reflected wave of an ultrasonic signal. | 10-27-2011 |
20110320165 | ELECTRONIC PEN SYSTEM, POSITIONAL VARIATION MEASURING DEVICE, DISPLAY METHOD, AND PROGRAM - Disclosed is an electronic pen system wherein re-calibration can be easily carried out when a receiver is re-attached or when the position of the receiver is varied after calibration to adjust the position of the pen with respect to the receiver to the position of the pen on the image projected by a projector or the like. The system comprises a measuring means for measuring the angle of variation from the initial setting of the receiver for measuring the position of the electronic pen to the re-setting of the receiver and the amounts of movement in the horizontal direction and the vertical direction from the initial setting to the re-setting and a display means for reflecting the measured angle of variation and the measured amounts of movement in the horizontal direction and the vertical direction on the trace of the electronic pen after the re-setting. | 12-29-2011 |
20120113753 | POSITION DETECTION SYSTEM, TRANSMISSION DEVICE AND RECEPTION DEVICE, AND POSITION DETECTION METHOD - A position detection system, includes at least one moving body (MB) including a transmission device simultaneously emitting a trigger signal indicating transmission timing and an ultrasonic signal obtained by modulating a signal of a frequency as a reference by pseudo random sequence data having high self-correlativity, and a reception device detecting MB position. The reception device includes ultrasonic reception units, a unit calculating a correlation value between a waveform of the ultrasonic signal and a model waveform of the pseudo random sequence, a unit subjecting the waveform of the ultrasonic signal and the model waveform to calculate a correlation value between the two waveforms, a unit calculating a propagation time of each ultrasonic to arrive at each of the ultrasonic reception units from trigger signal reception to correlation peak detection, and a unit calculating MB position from the ultrasonic propagation time and the interval length between the ultrasonic reception units. | 05-10-2012 |
20120194486 | DIGITAL PEN SYSTEM AND PEN-BASED INPUT METHOD - A digital pen system includes: a rod-shaped digital pen that periodically transmits a signal including information about a direction of the digital pen; and a receiving apparatus that detects a position and direction of the digital pen in three-dimensional space based on the signal, calculates a intersection of an extension line of the digital pen in a longitudinal direction thereof and a display screen of a display apparatus, and enables the display apparatus to perform pen-based input at the intersection. | 08-02-2012 |
20120198937 | ULTRASONIC WAVE TRANSMITTER DEVICE, ULTRASONIC WAVE PROPAGATION TIME MEASUREMENT SYSTEM AND ULTRASONIC WAVE PROPAGATION TIME MEASUREMENT METHOD - An ultrasonic wave transmitter device includes an ultrasonic wave driving circuit that modulates an ultrasonic wave based on a pseudorandom signal to generate an ultrasonic wave driving signal, and an ultrasonic wave transmitter driven by the ultrasonic wave driving signal to send out an ultrasonic wave signal of a frequency higher than a fundamental frequency of the ultrasonic wave driving signal. The ultrasonic wave transmitter includes a cylindrically-shaped piezoelectric or magnetostrictive element sending out the ultrasonic wave signal and an ultrasonic wave absorber that covers part of a base member holding the piezoelectric or magnetostrictive element. | 08-09-2012 |