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    • 2. 发明授权
    • Electrical touch sensor and human interface device using the same
    • 电触摸传感器和人机界面设备使用相同
    • US07605805B2
    • 2009-10-20
    • US11145332
    • 2005-06-03
    • Deok-Young JungJae-Surk HongYoung-Ho Shin
    • Deok-Young JungJae-Surk HongYoung-Ho Shin
    • G09G5/00
    • G06F3/0383G06F3/03543G06F3/03547G06F2203/0339
    • An electrical touch sensor is provided. The electrical touch sensor includes: a touch detection part having at least one touch pad and generating a first signal having a same delay time regardless of whether the object is in contact with the touch pad and a second signal having a varied delay time according to whether the object is in contact with the touch pad; and a contact signal generator generating a contact signal in response to the delay time-difference between the first and second signals.Therefore, it is possible to increase operation reliability by precisely determining whether the object is in contact with the pad, when the object has charge accumulation characteristics more than a certain level, although its conductive is insufficient. In addition, the electrical touch sensor can determine whether the object is in contact with the pad using only one pad to reduce a layout area of a product.
    • 提供电触摸传感器。 电触摸传感器包括:触摸检测部分,具有至少一个触摸板,并且产生具有相同延迟时间的第一信号,而不管对象是否与触摸板接触,以及根据是否具有变化的延迟时间的第二信号 物体与触摸板接触; 以及接触信号发生器,响应于第一和第二信号之间的延迟时间差产生接触信号。 因此,虽然其导电性不足,但是当物体的电荷累积特性大于一定水平时,可以通过精确地确定物体是否与焊盘接触来提高操作可靠性。 此外,电触摸传感器可以使用仅一个垫来确定物体是否与垫接触以减少产品的布局面积。
    • 6. 发明授权
    • Photocurrent sensing circuit having stabilized feedback loop
    • 光电流检测电路具有稳定的反馈回路
    • US07129463B2
    • 2006-10-31
    • US10968535
    • 2004-10-19
    • Deok-Young Jung
    • Deok-Young Jung
    • H03F3/08
    • H01L31/02019H03F3/082
    • A photocurrent sensing circuit having a stabilized feedback loop comprises a photocurrent generator including a photodiode generating the photocurrent in proportion to an amount of incident light and applying the photocurrent to an output node, a switching unit applying the photocurrent applied to a control node to a voltage-generating capacitor when a shutter signal is in a first state, and applying a predetermined current to the control node when the shutter signal is in a second state, and a circuit stabilizer applying the photocurrent applied to the output node to the control node, and always forming a feedback loop of the photodiode through the photocurrent applied to the output node, wherein the circuit stabilizer comprises a first NMOS transistor forming the feedback loop of the photodiode in response to the photocurrent input to the output node when the predetermined current is applied to the control node, breaking the feedback loop and applying the photocurrent applied to the output node to the control node when the predetermined current is not applied to the control node, a second NMOS transistor always forming the feedback loop of the photodiode in response to the photocurrent applied to the output node, and a third NMOS transistor connected to the first and second transistors and the photodiode, and providing a current path for forming the feedback loop.
    • 具有稳定的反馈回路的光电流检测电路包括光电流发生器,其包括光电二极管,其产生与入射光量成比例的光电流并将光电流施加到输出节点;开关单元,将施加到控制节点的光电流施加到电压 当快门信号处于第一状态时,产生电容器,并且当快门信号处于第二状态时将预定电流施加到控制节点;以及电路稳压器,将施加到输出节点的光电流施加到控制节点,以及 总是通过施加到输出节点的光电流形成光电二极管的反馈回路,其中电路稳压器包括第一NMOS晶体管,当预定电流被施加到第一NMOS晶体管时,该第一NMOS晶体管响应于光电流输入到输出节点,形成光电二极管的反馈回路 控制节点,断开反馈回路并施加光电流 当所述预定电流不被施加到所述控制节点时,输出节点到所述控制节点;响应于施加到所述输出节点的光电流总是形成所述光电二极管的反馈回路的第二NMOS晶体管,以及连接到所述第一NMOS晶体管的第三NMOS晶体管 以及第二晶体管和光电二极管,并提供用于形成反馈回路的电流路径。