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    • 2. 发明申请
    • APPARATUS AND METHOD FOR DRIVING TOUCH PANEL
    • 用于驱动触控面板的装置和方法
    • US20110227865A1
    • 2011-09-22
    • US13046125
    • 2011-03-11
    • Young Jin Baek
    • Young Jin Baek
    • G06F3/045
    • G06F3/0418G06F3/044
    • Disclosed herein is an apparatus and method for driving a touch panel, which the touch panel is insensitive to noise while increasing sensitivity rather than that of an output voltage generated by a change in capacitance. An apparatus for driving a touch panel includes a sampling unit for receiving a voltage generated by a change in the capacitance of the touch panel as an input, comparing the inputted voltage with a previously stored value, storing the voltage in a minimum value storage unit or a maximum value storage unit based on a comparison result, and performing a weighted average operation on the stored voltage with a value stored in an average storage unit to which a weight is applied; a multiplexer for receiving averages stored in the average storage unit and sequentially outputting the averages; a maximum/minimum subtracter for receiving minimum and maximum averages inputted from the multiplexer, applying a first gain to the minimum and maximum averages so as to amplify them, and applying a second gain to a difference between the amplified minimum and maximum averages; an analog to digital converter (ADC) for receiving an output inputted from the maximum/minimum subtracter and converting the output into a digital value; and a control unit for receiving an output inputted from the ADC, recognizing a touch of the touch panel, and controlling a gain of the maximum/minimum subtracter.
    • 这里公开了一种用于驱动触摸面板的装置和方法,触摸面板在增加灵敏度而不是由电容变化产生的输出电压的情况下对噪声不敏感。 用于驱动触摸面板的装置包括:采样单元,用于接收由触摸面板的电容变化产生的电压作为输入,将输入的电压与预先存储的值进行比较,将电压存储在最小值存储单元中;或 基于比较结果的最大值存储单元,并且使用存储在应用了权重的平均存储单元中的值对所存储的电压执行加权平均操作; 多路复用器,用于接收平均存储单元中存储的平均值并顺序地输出平均值; 用于接收从多路复用器输入的最小和最大平均值的最大/最小减法器,将第一增益应用于最小和最大平均值以便放大它们,以及将第二增益应用于放大的最小和最大平均值之间的差; 模数转换器(ADC),用于接收从最大/最小减法器输入的输出并将输出转换成数字值; 以及控制单元,用于接收从ADC输入的输出,识别触摸面板的触摸,以及控制最大/最小减法器的增益。
    • 7. 发明申请
    • APPARATUS FOR DRIVING TOUCH PANEL
    • 用于驱动触控面板的装置
    • US20110227864A1
    • 2011-09-22
    • US13045773
    • 2011-03-11
    • Young Jin Baek
    • Young Jin Baek
    • G06F3/045
    • G06F3/044G06F3/0418
    • Disclosed herein is an apparatus for driving a touch panel, which calibrates a drift of an output voltage, generated by a change of an external environment or touch panel, thereby having excellent noise characteristics, high touch sensitivity. The apparatus includes a touch panel having a plurality of pixels. Each of the pixels is connected to a first capacitor in which their electric charges are stored. A differential amplifier receives and amplifies the amount of electric charges generated by a change in the capacitance of the first capacitor of the touch panel, inputted through two input terminals and outputs the amplified voltage to two output terminals. An analog to digital converter (ADC) receives an output of the differential amplifier as an input and converts the output into a digital value. A reference voltage calibrator outputs positive and negative voltages to the differential amplifier and calibrates a reference voltage. An error calibrator outputs positive and negative voltages to the differential amplifier and calibrates two outputs of the differential amplifier within a voltage input range of the ADC. A controller feeds back the two outputs of the differential amplifier, which are beyond the voltage input range of the ADC, to the error calibrator.
    • 本文公开了一种用于驱动触摸面板的装置,其校准由外部环境或触摸面板的变化产生的输出电压的漂移,从而具有优异的噪声特性和高的触摸灵敏度。 该装置包括具有多个像素的触摸面板。 每个像素连接到其中存储电荷的第一电容器。 差分放大器接收并放大通过两个输入端输入的触摸面板的第一电容器的电容变化产生的电荷量,并将放大的电压输出到两个输出端子。 模数转换器(ADC)接收差分放大器的输出作为输入,并将输出转换为数字值。 参考电压校准器向差分放大器输出正电压和负电压,并校准参考电压。 误差校准器向差分放大器输出正电压和负电压,并在ADC的电压输入范围内校准差分放大器的两个输出。 控制器将超出ADC的电压输入范围的差分放大器的两个输出反馈到误差校准器。