Projection system and method for operating a projection system to compensate for overshoot sequence
    1.
    发明授权
    Projection system and method for operating a projection system to compensate for overshoot sequence 失效
    用于操作投影系统以补偿过冲序列的投影系统和方法

    公开(公告)号:US07887196B2

    公开(公告)日:2011-02-15

    申请号:US11912343

    申请日:2006-04-21

    IPC分类号: G03B21/20 H05B37/02

    摘要: A method for operating a projection system (1) is described, wherein a brightness level (B1, B2, B3, B4, B5, B6) in an image (IM) is represented by the total length of a number of light switch-on phases within a particular image cycle (VT). A high pressure discharge lamp (2) of the projection system (1) is operated via a lamp driver with an essentially square-wave alternating current (IL) SO that an overshoot sequence (0), which occurs in the alternating current (IL) after a current zero crossing during operation of the high pressure discharge lamp (2), has a frequency so high that for each possible brightness level at least one full period (P) of the overshoot sequence (0) lies essentially within a light switch-on or switch-off phase (ts) following the zero crossing. A projection system (1) and a lamp driver (10) for a high pressure discharge lamp (2) in such a projection system (1) are also described.

    摘要翻译: 描述了一种用于操作投影系统(1)的方法,其中图像(IM)中的亮度级(B1,B2,B3,B4,B5,B6)由多个光接通的总长度 在特定图像周期(VT)内的相位。 投影系统(1)的高压放电灯(2)通过灯驱动器操作,该灯驱动器具有基本上为方波的交流(IL)SO,即在交流电(IL)中发生的过冲序列(0) 在高压放电灯(2)的操作期间的电流过零之后,具有如此高的频率,使得对于每个可能的亮度级,过冲序列(0)的至少一个全周期(P)基本上位于光开关 - 在零交叉之后的开启或关闭阶段(ts)。 还描述了在这种投影系统(1)中的用于高压放电灯(2)的投影系统(1)和灯驱动器(10)。

    Projection System and Method for Operating a Projection System
    2.
    发明申请
    Projection System and Method for Operating a Projection System 失效
    投影系统和投影系统的操作方法

    公开(公告)号:US20080273179A1

    公开(公告)日:2008-11-06

    申请号:US11912343

    申请日:2006-04-21

    IPC分类号: G03B21/20

    摘要: A method for operating a projection system (1) is described, wherein a brightness level (B1, B2, B3, B4, B5, B6) in an image (IM) is represented by the total length of a number of light switch-on phases within a particular image cycle (VT). A high pressure discharge lamp (2) of the projection system (1) is operated via a lamp driver with an essentially square-wave alternating current (IL) SO that an overshoot sequence (O), which occurs in the alternating current (IL) after a current zero crossing during operation of the high pressure discharge lamp (2), has a frequency so high that for each possible brightness level at least one full period (P) of the overshoot sequence (O) lies essentially within a light switch-on or switch-off phase (ts) following the zero crossing. A projection system (1) and a lamp driver (10) for a high pressure discharge lamp (2) in such a projection system (1) are also described.

    摘要翻译: 描述了用于操作投影系统(1)的方法,其中图像(IM)中的亮度级(B 1,B 2,B 3,B 4,B 5,B 6)由a 特定图像周期内的点亮开关相位数(VT)。 投影系统(1)的高压放电灯(2)通过具有基本上方波的交流(IL)SO的灯驱动器操作,在交流电(IL)中发生的过冲序列(O) 在高压放电灯(2)的操作期间的电流过零之后,具有如此高的频率,使得对于每个可能的亮度级,过冲序列(O)的至少一个全周期(P)基本上位于光开关 - 在零交叉之后的开启或关闭阶段(ts)。 还描述了在这种投影系统(1)中的用于高压放电灯(2)的投影系统(1)和灯驱动器(10)。