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    • 3. 发明授权
    • Coordinate input apparatus
    • 坐标输入装置
    • US5684277A
    • 1997-11-04
    • US508326
    • 1995-07-27
    • Masaki TokiokaAtsushi TanakaYuichiro YoshimuraRyozo YanagisawaKatsuyuki KobayashiHajime Sato
    • Masaki TokiokaAtsushi TanakaYuichiro YoshimuraRyozo YanagisawaKatsuyuki KobayashiHajime Sato
    • G06F3/043G06F3/033G08C21/00G09G3/02
    • G06F3/0433
    • A coordinate input apparatus which can attain an accurate coordinate input operation, includes a sensor for detecting an input variation. The vibration is amplified, and an envelope detection circuit generates the envelope of the amplified vibration. A gate signal generation circuit receives the envelope and a second-order differential signal of the envelope generated by an inflection point detection circuit. The gate signal generation circuit attenuates the envelope and adds a predetermined offset to the attenuated envelope. The gate signal generation circuit compares the sum signal with the second-order differential signal to generate a gate signal. In the duration of the gate signal, a tg comparator detects, as a group delay time, a time up to the zero cross point of the second-order differential signal, and a tp comparator detects, as a phase delay time, a time up to the zero cross point in a predetermined order of a phase signal. An arithmetic control circuit calculates the coordinate position of a vibration input source on the basis of these delay times.
    • 可以获得精确的坐标输入操作的坐标输入装置包括用于检测输入变化的传感器。 振动被放大,包络检测电路产生放大振动的包络。 门信号发生电路接收包络线和由拐点检测电路产生的包络的二阶差分信号。 门信号发生电路使包络衰减,并向衰减的包络增加预定的偏移。 门信号发生电路将和信号与二阶差分信号进行比较以产生门信号。 在门信号的持续时间中,tg比较器作为组延迟时间检测到二阶差分信号的零交叉点的时间,并且tp比较器作为相位延迟时间检测时间 以相位信号的预定顺序移动到零交叉点。 算术控制电路基于这些延迟时间来计算振动输入源的坐标位置。
    • 5. 发明授权
    • Coordinates input apparatus with a plate member separated by a gap from a vibration transmission plate
    • 使具有与振动传播板间隔开的板构件的输入装置进行坐标
    • US06570558B2
    • 2003-05-27
    • US08775201
    • 1996-12-30
    • Yuichiro YoshimuraAtsushi TanakaRyozo YanagisawaKatsuyuki KobayashiMasaki TokiokaHajime Sato
    • Yuichiro YoshimuraAtsushi TanakaRyozo YanagisawaKatsuyuki KobayashiMasaki TokiokaHajime Sato
    • G09G500
    • G06F3/0433
    • An influence by a vibration which is transmitted in the air is reduced, thereby preventing an erroneous detection of coordinates or a deterioration in a detecting precision. An elastic resin sheet is arranged on a coordinates input surface side of a vibration transmission plate so as to have a gap between the resin sheet and the vibration transmission plate and is fixed by an adhesive layer. When coordinates are inputted by a vibrator pen, namely, when a vibration is inputted, the resin sheet is warped by a writing pressure of the vibrator pen and the resin sheet comes into contact with the vibration transmission plate. Therefore, the vibration applied by the vibrator pen is efficiently transmitted to the vibration transmission plate. On the other hand, a vibration transmitted from the air is reflected by the boundary on both surface sides of the resin sheet and by the surface of the vibration transmission plate by a difference between acoustic impedances, so that the vibration entering the vibration transmission plate is remarkably reduced.
    • 在空气中传递的振动的影响减小,从而防止错误的坐标检测或检测精度的劣化。 弹性树脂片被布置在振动传播板的坐标输入表面侧,以便在树脂片和振动传播板之间具有间隙,并通过粘合剂层固定。 当通过振动笔输入坐标时,即当输入振动时,树脂片被振动笔的书写压力扭曲,并且树脂片与振动传播板接触。 因此,振动笔施加的振动被有效地传递到振动传播板。 另一方面,从空气传递的振动由树脂片的两面的边界和振动传播板的表面之间的声阻抗之间的差异反射,使得进入振动传播板的振动为 明显减少