摘要:
There is provided a coordinates input apparatus for detecting the coordinates of a point indicated by an instruction pen on a vibration transmitting plate made of a transparent tablet on the basis of the vibration transmission times on this plate. This apparatus comprises: a pen as vibration generating means for generating a vibration; a tablet as a vibration transmitting plate to transmit the vibration generated by the pen; vibration sensors which are arranged on the tablet and detect at a plurality of positions the vibrations transmitted by making the pen come into contact with the tablet; a microcomputer for obtaining the vibration transmission distances from the vibration transmission times of the vibrations detected by the sensors and for calculating the coordinate point on the tablet with which the pen is come into contact; an output device to output the coordinate point calculated by the microcomputer; an erroneous detection discriminating circuit to discriminate whether the coordinate point calculated is the erroneously detected coordinate point or not; and a controller for allowing a correction point calculating means to calculate and output a correction point in place of the erroneously detected coordinate point.
摘要:
A coordinate input apparatus includes a vibration pen, a vibration transmission plate, a plurality of vibration detecting units, a calculating unit, a memory unit, and a control unit. The calculating unit calculates vibration transmission times from a point designated by the vibration pen to the vibration detecting units, and calculates coordinate values of the designated point of the vibration pen. The memory unit stores the vibration transmission times from a first designated point of the vibration pen on the vibration transmission plate to the vibration detecting units and coordinate values of the first designated point. The control unit performs calculations on the basis of vibration transmission times from a second designated point calculated by the calculating unit to the vibration detecting units, the vibration transmission times from the first designated point and the coordinate values of the first designated point stored in the memory unit, thereby calculating coordinate values of the second designated point.
摘要:
There is provided a coordinates input apparatus in which a vibration input from a vibration pen having a piezoelectric transducer is detected by a plurality of vibration sensors attached to a vibration propagating plates such as an input tablet and the coordinates of this pen on the plate are detected. The tip of the vibration input pen is made of a material of a resin of the polyamideimide system such as thermoplastic polyamideimide or aromatic polyamideimide. With this material, a desired image can be smoothly input to the input tablet without scratching the glass surface thereof and the accurate coordinates can be detected.
摘要:
Disclosed is a coordinate input apparatus for detecting an input vibration from a vibration pen by a vibration sensor provided on a vibration transmitting plate to measure a vibration transmission time to the vibration pen to detect the input coordinates of the vibration pen on the vibration transmitting plate on the basis of the measurement result. The vibration pen is made wireless by incorporating all mechanisms required to generate the vibration. A drive timing for vibration input from the vibration pen and used as a measurement origin of the vibration transmission time is transmitted to a main body for performing the coordinate detection processing by bringing the vibration pen in temporary contact with the main body.
摘要:
A coordinate position correcting apparatus includes a setting device for setting in advance a coordinate to be input into a vibration input device, a correction coefficient calculator for calculating a correction coefficient as a ratio of the coordinate set by the setting device to a coordinate output by calculation, and a coordinate corrector for correcting the coordinate output by calculation on the basis of the correction coefficient calculated by the correction coefficient calculator.
摘要:
In a coordinates input apparatus in which a vibration input from a vibration pen is detected by a plurality of vibration sensors attached to a transparent vibration propagating plate such as an acrylic or glass plate and the coordinate position of the vibration pen is detected from the vibration propagation times until the vibration sensors, the sensors and the vibration proof material are arranged in a manner such that a distance between the attaching boundary surface of the vibration proof material attached to the peripheral portion of the vibration propagating plate and the center of each sensor which is attached to the input side than the attaching boundary surface of the vibration proof material lies within a range from 0.5 time to a value less than 1.0 time as large as the diameter of the sensor, preferably, within a range from 1.0 mm to a value less than 2.0 mm.
摘要:
A coordinate input apparatus for detecting a vibration transmitted from a vibration input pen by a plurality of vibration sensors arranged on a vibration transmission member, and for determining coordinates of the vibration input pen from vibration propagation times required between the position of the vibration input pen to the positions of the vibration sensors, includes a vibration-isolating member formed in a peripheral portion of the vibration transmission member. The vibration-isolating member has a multi-layered structure consisting of a plurality of vibration-isolating layers formed so that a layer nearer to the vibration transmission plate has a lower acoustic impedance than that of a layer farther from the vibration transmission plate.
摘要:
A coordinate input apparatus in which a vibration which was input by a vibration input pen is detected by vibration sensors attached to a vibration propagating plate such as a transparent glass plate or the like and the coordinates of the position of the pen on the plate are detected. The apparatus includes an envelope output circuit to output envelope signals of detection signals of the sensors; a filter circuit for filtering the envelope signals; a gate signal output circuit for detecting a portion, exceeding a predetermined threshold value, of the envelope signal output from the filter circuit and for outputting a gate signal; a first detector for detecting the peak of the envelope signal output from the envelope output circuit and for detecting the envelope signal by using the peak as a reference; a second detector for detecting a phase signal of the detection signal by using the leading edge of the phase signal as a reference in the period of time during which the gate signal output from the gate signal is output circuit; and a calculating circuit to calculate the position coordinates of the input pen on the basis of the propagation time of the envelope signal detected by the first detector and the propagation time of the phase signal detected by the second detector.
摘要:
A vibrating input pen used for a coordinate input apparatus for detecting a coordinate of an input position of a vibration by detecting the vibration input from the vibrating input pen to a vibration transmitting plate includes a vibration generating element for generating a vibration and a horn member forming a pen point of the vibrating input pen for transmitting the vibration generated from the vibration generating element. A positioning member positions the vibration generating element in relation to the horn member so that the direction of vibration of the vibration generating element coincides with the direction of vibration of the horn member and the axis of the vibration generating element coincides with the axis of the horn member.
摘要:
A coordinates input apparatus, for example, a digitizer, has a vibration propagation medium such as a transparent glass plate for allowing a vibration to propagate therethrough; an input pen for applying vibration to the vibration propagation medium; a vibration detector for detecting vibration applied by the input pen; an envelope output device for producing an envelope signal representing the envelope of the vibration detected by the vibration detector; a differentiator for conducting a differentiation of the envelope signal produced by the envelope output device so as to determine the peak; a controller adapted for determining, as the time of arrival of the vibration, a zero-cross point of the vibration that is located in the vicinity of a zero-cross point of the signal from the differentiator; and a computing device for computing the distance between the input pen and the vibration detector from the time determined by the controller.