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    • 5. 发明授权
    • Light sensing circuit, method of driving the same, and touch panel including the light sensing circuit
    • 光感测电路,驱动电路的方法以及包括光感测电路的触摸面板
    • US08289298B2
    • 2012-10-16
    • US12568931
    • 2009-09-29
    • Deok-Young ChoiYong-Sung ParkDo-Youb KimSoon-Sung AhnIn-Ho Choi
    • Deok-Young ChoiYong-Sung ParkDo-Youb KimSoon-Sung AhnIn-Ho Choi
    • G06F3/042
    • G06F3/0412G06F3/042
    • A light sensing circuit, a method of driving the same, and a touch panel including the light sensing circuit, the light sensing circuit including a photodiode generating current according to the brightness of light incident from the outside; a driving transistor having a first electrode to which a first power voltage is applied, a second electrode, and a gate electrode electrically connected to a cathode of the photodiode; a first reset transistor having a first electrode to which an initialization voltage is applied, a second electrode connected to the gate electrode of the driving transistor, and a gate electrode to which a previous scan signal is applied; and a shielding capacitor disposed between the gate electrode of the driving transistor and the cathode of the photodiode. Accordingly, the brightness of light incident on the photodiode can be accurately determined by initializing the cathode of the photodiode by using a constant voltage.
    • 光感测电路,其驱动方法以及包括光感测电路的触摸面板,所述光感测电路包括根据从外部入射的光的亮度产生电流的光电二极管; 具有施加有第一电源电压的第一电极的驱动晶体管,与所述光电二极管的阴极电连接的第二电极和栅电极; 第一复位晶体管,具有施加初始化电压的第一电极,连接到驱动晶体管的栅电极的第二电极和施加了先前扫描信号的栅电极; 以及设置在驱动晶体管的栅电极和光电二极管的阴极之间的屏蔽电容器。 因此,通过使用恒定电压初始化光电二极管的阴极,可以准确地确定入射到光电二极管上的光的亮度。
    • 9. 发明申请
    • LIGHT SENSING CIRCUIT, METHOD OF DRIVING THE SAME, AND TOUCH PANEL INCLUDING THE LIGHT SENSING CIRCUIT
    • 光感测电路,其驱动方法以及包含光感测电路的触控面板
    • US20100097334A1
    • 2010-04-22
    • US12568931
    • 2009-09-29
    • Deok-Young ChoiYong-Sung ParkDo-Youb KimSoon-Sung AhnIn-Ho Choi
    • Deok-Young ChoiYong-Sung ParkDo-Youb KimSoon-Sung AhnIn-Ho Choi
    • G06F3/041H01J40/00
    • G06F3/0412G06F3/042
    • A light sensing circuit, a method of driving the same, and a touch panel including the light sensing circuit, the light sensing circuit including a photodiode generating current according to the brightness of light incident from the outside; a driving transistor having a first electrode to which a first power voltage is applied, a second electrode, and a gate electrode electrically connected to a cathode of the photodiode; a first reset transistor having a first electrode to which an initialization voltage is applied, a second electrode connected to the gate electrode of the driving transistor, and a gate electrode to which a previous scan signal is applied; and a shielding capacitor disposed between the gate electrode of the driving transistor and the cathode of the photodiode. Accordingly, the brightness of light incident on the photodiode can be accurately determined by initializing the cathode of the photodiode by using a constant voltage.
    • 光感测电路,其驱动方法以及包括光感测电路的触摸面板,所述光感测电路包括根据从外部入射的光的亮度产生电流的光电二极管; 具有施加有第一电源电压的第一电极的驱动晶体管,与所述光电二极管的阴极电连接的第二电极和栅电极; 第一复位晶体管,具有施加初始化电压的第一电极,连接到驱动晶体管的栅电极的第二电极和施加了先前扫描信号的栅电极; 以及设置在驱动晶体管的栅电极和光电二极管的阴极之间的屏蔽电容器。 因此,通过使用恒定电压初始化光电二极管的阴极,可以准确地确定入射到光电二极管上的光的亮度。