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    DISPLAY LED DRIVE CIRCUIT
    4.
    发明公开
    DISPLAY LED DRIVE CIRCUIT 有权
    LED控制电路电路的显示器

    公开(公告)号：EP1615195A4

    公开(公告)日：2007-06-20

    申请号：EP04714887

    申请日：2004-02-26

    申请人： KOMADEN CORP

    发明人： NAKAJIMA CHIAKI

    IPC分类号： G09G3/14 ,  G09F13/20 ,  G09G3/32 ,  H01L33/00

    CPC分类号： G09G3/32 ,  G09G3/14 ,  G09G3/2003 ,  G09G2300/0814 ,  G09G2300/088 ,  H05B33/083 ,  H05B33/086

    摘要： A display LED drive circuit is configured as follows. For example, a constant current circuit, a green display LED circuit, and a red display LED circuit are connected in series and a resistor circuit having a resistor causing a potential difference identical to each of the display LED is connected in parallel to each of the LED circuits. A corresponding switching element of the display LED circuit and a corresponding switching element of the resistor circuit connected in parallel are controlled to be opened and closed in opposite ways. Another route connected to a source circuit in parallel is connected to a constant current circuit, a blue display LED circuit, and a constant voltage diode in series. The blue display LED circuit is connected in parallel to a resistor circuit as has been described above. A predetermined voltage is taken out from the output terminal by the constant voltage diode and supplied to a control circuit. Thus, it is possible to reduce the number of constant current circuits, current consumption, and the cost, thereby improving the power source use efficiency.

    MATRIX DISPLAY DEVICE WITH PHOTOSENSITIVE ELEMENT
    6.
    发明公开
    MATRIX DISPLAY DEVICE WITH PHOTOSENSITIVE ELEMENT 审中-公开
    矩阵显示设备具有光敏元件

    公开(公告)号：EP1547057A1

    公开(公告)日：2005-06-29

    申请号：EP03797413.6

    申请日：2003-08-08

    申请人： Koninklijke Philips Electronics N.V.

    发明人： JOHNSON, Mark, T. ,  GIRALDO, Andrea

    IPC分类号： G09G3/32

    CPC分类号： G09G3/3233 ,  G09G3/2014 ,  G09G3/3241 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/088 ,  G09G2310/0251 ,  G09G2320/0261 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2360/148

    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.

    ELECTROLUMINESCENT DISPLAY DEVICES
    7.
    发明公开
    ELECTROLUMINESCENT DISPLAY DEVICES 审中-公开
    电致发光显示装置

    公开(公告)号：EP1537555A1

    公开(公告)日：2005-06-08

    申请号：EP03793988.1

    申请日：2003-08-22

    申请人： Koninklijke Philips Electronics N.V.

    发明人： FISH, David, A.,Philips Int. Property & Stand. ,  CHILDS, Mark, J.,Philips Int. Property & Stand.

    IPC分类号： G09G3/30 ,  G09G3/32

    CPC分类号： G09G3/3233 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/088 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2360/148

    摘要： In an active matrix electroluminescent display device, a storage capacitor (24) is provided for storing a voltage to be used for addressing a drive transistor (22). A discharge photodiode (27) is provided for discharging the storage capacitor in dependence on the light output of the display element, and an input data voltage applied to the pixel is changed by an amount corresponding to the threshold voltage of the drive transistor. The changed data voltage is applied between the gate and source of the drive transistor. In this device the initial voltage on the gate of the drive transistor is modified so as to remove the dependency of the light output on the threshold voltage, so that threshold voltage variations can be tolerated.

    摘要翻译： 在有源矩阵电致发光显示装置中，提供存储电容器（24）以存储用于寻址驱动晶体管（22）的电压。 提供放电光电二极管（27），用于根据显示元件的光输出使存储电容器放电，并且施加到像素的输入数据电压改变对应于驱动晶体管的阈值电压的量。 改变的数据电压施加在驱动晶体管的栅极和源极之间。 在该装置中，驱动晶体管的栅极上的初始电压被修改以消除光输出对阈值电压的依赖性，使得阈值电压变化可以被容忍。

    ACTIVE MATRIX ELECTROLUMINESCENT DISPLAY DEVICE
    8.
    发明公开
    ACTIVE MATRIX ELECTROLUMINESCENT DISPLAY DEVICE 审中-公开
    有源矩阵电致发光显示装置

    公开(公告)号：EP1129446A1

    公开(公告)日：2001-09-05

    申请号：EP00958523.3

    申请日：2000-09-06

    申请人： Koninklijke Philips Electronics N.V.

    发明人： SHANNON, John, M. ,  KNAPP, Alan, G.

    IPC分类号： G09G3/32

    CPC分类号： G09G3/3233 ,  G09G3/3241 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/088 ,  G09G2320/043 ,  G09G2360/148 ,  H01L27/3269

    摘要： An active matrix electroluminescent display device in which the drive current through an electroluminescent display element (20) in each pixel (10) in a drive period is controlled by a driving device (22) based on a drive signal applied during a preceding address period and stored as a voltage on an associated storage capacitor (36). In order to counteract the effects of display element ageing, through which the light output for a given drive signal level diminishes over time, the pixel includes electro-optic discharging means (38) coupled to the storage capacitor and responsive to the display element's light output to leak stored charge and to control the integrated light output of the display element in the drive period. For improved control, the discharging means is arranged to rapidly discharge the capacitor at a controlled point in the drive period, upon the drive of the display element falling to a low level. A photoresponsive transistor can conveniently be utilised for this purpose.

    摘要翻译： 一种有源矩阵电致发光显示装置，其中在驱动周期中每个像素（10）中通过电致发光显示元件（20）的驱动电流由驱动装置（22）根据在前一寻址周期期间施加的驱动信号来控制，以及 作为电压存储在相关联的存储电容器（36）上。 为了抵消显示元件老化的影响，通过该老化，给定驱动信号电平的光输出随时间减小，该像素包括耦合到存储电容器并响应于显示元件的光输出的电光放电装置（38） 泄漏存储的电荷并且在驱动周期中控制显示元件的集成光输出。 为了改进控制，放电装置被布置成在驱动显示元件的驱动下降到低电平时在驱动时段中的受控点处快速放电电容器。 为此目的可以方便地使用光响应晶体管。

    Method and apparatus for selective enabling of addressable display elements
    9.
    发明公开
    Method and apparatus for selective enabling of addressable display elements 审中-公开
    Vorrichtung und Verfahren zur selektiven Aktivierung von adressierbaren Anzeigeelementen

    公开(公告)号：EP0969445A1

    公开(公告)日：2000-01-05

    申请号：EP99304752.1

    申请日：1999-06-17

    申请人： SUN MICROSYSTEMS, INC.

    发明人： Rindal, Abraham ,  Law, Michele ,  Miseli, Joseph

    IPC分类号： G09G3/20

    CPC分类号： G09G3/2085 ,  G09G3/20 ,  G09G2300/088 ,  G09G2310/0267 ,  G09G2310/0275

    摘要： A method and apparatus for driving a plurality of addressable elements consist of driving and selectively enabling one or more addressable elements arranged as an MxN array using two drivers. A first and a second driver are used to drive first and second signals at slightly different frequencies on a first and a second display conductor. A plurality of pixels, coupled between the first and second display conductors, is addressed according to a pixel location in which the first signal is approximately in phase with the second signal. The pixel scan rate is proportional to the difference between the first and second signal frequencies. The first and second conductors may contain a plurality of delay elements and tap-off points. Conducting lines may be terminated by their characteristic impedance to prevent any reflection of the traveling signals. The matrix display pixels are selectively enabled by modulating an amplitude of the first signal and/or an amplitude of the second signal when the selected pixel location(s) is addressed so that the voltage differential between the first and second signals is sufficient to enable the addressed pixel.

    摘要翻译： 用于驱动多个可寻址元件的方法和装置包括使用两个驱动器来驱动和选择性地启用被布置为MxN阵列的一个或多个可寻址元件。 第一和第二驱动器用于在第一和第二显示导体上以稍微不同的频率驱动第一和第二信号。 耦合在第一和第二显示导体之间的多个像素根据其中第一信号与第二信号大致同相的像素位置被寻址。 像素扫描速率与第一和第二信号频率之间的差成比例。 第一和第二导体可以包含多个延迟元件和分接点。 导线可以通过其特性阻抗来终止，以防止行进信号的任何反射。 当所选择的像素位置被寻址时，通过调制第一信号的幅度和/或第二信号的幅度来选择性地启用矩阵显示像素，使得第一和第二信号之间的电压差足以使能 寻址像素。