System and method for canceling dark photocurrent in a color sensor circuit
    1.
    发明授权
    System and method for canceling dark photocurrent in a color sensor circuit 有权
    在彩色传感器电路中消除暗光电流的系统和方法

    公开(公告)号:US07889249B2

    公开(公告)日:2011-02-15

    申请号:US12832303

    申请日:2010-07-08

    IPC分类号: H04N9/64 H04N5/217

    摘要: A system and method for canceling dark photocurrent in a color sensor circuit is disclosed. A color sensor is described including a color sensor circuit, a dark color sensor circuit, and a differential amplifier circuit. The color sensor circuit receives photocurrent from a color component of a light input. The color sensor circuit outputs a first voltage indicating intensity of the color component. The dark color sensor circuit receives dark photocurrent and outputs a second voltage indicating an offset voltage. The differential amplifier circuit is coupled to the color sensor circuit and to the dark color sensor circuit. The differential amplifier circuit receives the first and second voltages and outputs a final output that cancels contributions of the offset voltage in the first voltage due to the dark photocurrent.

    摘要翻译: 公开了一种在彩色传感器电路中消除暗光电流的系统和方法。 描述了一种颜色传感器,其包括颜色传感器电路,深色传感器电路和差分放大器电路。 颜色传感器电路从光输入的颜色分量接收光电流。 颜色传感器电路输出指示颜色分量的强度的第一电压。 深色传感器电路接收暗光电流并输出指示偏移电压的第二电压。 差分放大器电路耦合到彩色传感器电路和暗色传感器电路。 差分放大器电路接收第一和第二电压,并输出由于暗光电流而消除第一电压中的偏移电压的贡献的最终输出。

    Two-terminal LED device with tunable color
    2.
    发明申请
    Two-terminal LED device with tunable color 审中-公开
    双端LED设备,可调色

    公开(公告)号:US20060273331A1

    公开(公告)日:2006-12-07

    申请号:US11147056

    申请日:2005-06-07

    IPC分类号: H01L33/00

    CPC分类号: H05B33/0866 H05B33/0815

    摘要: A two-terminal light-emitting diode (“LED”) device has a first terminal and a second terminal, and a first color LED and a second color LED. An intensity control device is coupled to the first color LED and a control circuit controls the intensity control device so as to produce a selected light intensity from the first color LED according to a control signal provided to the first terminal. The control signal also provides electrical power to the first color LED and to the second color LED.

    摘要翻译: 两端子发光二极管(“LED”)器件具有第一端子和第二端子,以及第一颜色LED和第二颜色LED。 强度控制装置耦合到第一颜色LED,并且控制电路根据提供给第一终端的控制信号控制强度控制装置以便从第一颜色LED产生所选择的光强度。 控制信号还为第一颜色LED和第二颜色LED提供电力。