Matrix display device with photosensitive element
    41.
    发明申请
    Matrix display device with photosensitive element 有权
    具有感光元件的矩阵显示装置

    公开(公告)号:US20060038751A1

    公开(公告)日:2006-02-23

    申请号:US10528493

    申请日:2003-08-08

    IPC分类号: G09G3/30

    摘要: A matrix display device comprises an array of addressable pixels (10) each having a display element (20) and a control circuit for controlling the operation of the display element. The control circuit includes a charge storage capacitor (36) and a photosensitive device (40) coupled to the storage capacitor for regulating charge stored on the storage capacitor (36) in accordance with light falling on the photosensitive device (40). The control circuit further comprises means for independent voltage control (42) of a gate terminal of the photosensitive device (40), preferably a phototransistor. In this way a more efficient and flexible biasing of the phototransistor is possible. The means preferably comprise a second row line (42) being connected to the gate terminal of the photosensitive device (40). This additional line allows also the use of transistors of the same polarity for this type of pixel circuit, saving additional process masks (and costs). In addition, it becomes possible to use the phototransistor as a TFT switch. This dual function (phototransistor/TFT switch) enables the pixel circuit to provide additional features; for example duty-cycle techniques for motion blur compensation.

    摘要翻译: 矩阵显示装置包括每个具有显示元件(20)的可寻址像素阵列(10)和用于控制显示元件的操作的控制电路。 控制电路包括电荷存储电容器(36)和耦合到存储电容器的光敏器件(40),用于根据落在光敏器件(40)上的光来调节存储在存储电容器(36)上的电荷。 控制电路还包括用于光敏器件(40)的栅极端子的独立电压控制(42)的装置,优选光电晶体管。 以这种方式,光电晶体管的更有效和灵活的偏置是可能的。 该装置优选地包括连接到感光装置(40)的栅极端子的第二行线(42)。 这种额外的线还允许使用相同极性的晶体管用于这种类型的像素电路,从而节省额外的处理掩模(和成本)。 此外,可以使用光电晶体管作为TFT开关。 这种双功能(光电晶体管/ TFT开关)使像素电路能够提供额外的功能; 例如运动模糊补偿的占空比技术。