公开(公告)号：DE602007006942D1

公开(公告)日：2010-07-15

申请号：DE602007006942

申请日：2007-04-25

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： TOLLE TOBIAS GEORG ,  SCHREEL LUDO VALERE MAURICE ,  DEPPE CARSTEN

IPC: H05B41/292

公开(公告)号：WO2007132369A2

公开(公告)日：2007-11-22

申请号：PCT/IB2007051526

申请日：2007-04-25

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  TOLLE TOBIAS GEORG ,  SCHREEL LUDO VALERE MAURICE ,  DEPPE CARSTEN

Inventor： TOLLE TOBIAS GEORG ,  SCHREEL LUDO VALERE MAURICE ,  DEPPE CARSTEN

IPC: H05B41/292

CPC classification number: H05B41/2928 ,  H04N9/3144 ,  H04N9/3155 ,  H05B41/384 ,  Y02B20/206

Abstract: The invention describes a method of shutting down a high pressure discharge lamp (1) in which a pair of electrodes (2) is disposed in an arc tube (3), which method comprises reducing, upon receipt of a shut-down request (SR), the lamp power (P) towards a reduced power level (PR) required to sustain a long-term arc discharge between the electrodes (2), and driving the lamp (1) towards the reduced power level (PR) for a reduced power duration before completely shutting down the lamp power (P), whereby, prior to reducing the lamp power (P) towards the reduced power level (PR), the lamp power (P) is reduced to an undershoot power level (Pu), which undershoot power level (Pu) is lower than the reduced power level (PR) required to sustain a long- term arc discharge between the electrodes (2), and the lamp is driven at this undershoot power level (Pu) for an undershoot power duration (tu) before increasing the lamp power (P) again to approach the reduced power level (PR). Moreover the invention describes an appropriate driving unit (4) for driving a high pressure discharge lamp (1) and an image rendering system (40), particularly a projector system, comprising such a driving unit (4).

Abstract translation: 本发明描述了一种关闭其中一对电极（2）设置在电弧管（3）中的高压放电灯（1）的方法，该方法包括在接收到关闭请求（SR ），朝向维持电极（2）之间的长期电弧放电所需的降低功率电平（PR）的灯功率（P）），并且朝向降低的功率电平（PR）驱动灯（1）以减少 在完全关闭灯泡功率（P）之前的功率持续时间，由此，在将灯功率（P）降低到降低功率水平（PR）之前，灯功率（P）减小到下冲功率水平（Pu） 其功率水平（Pu）低于在电极（2）之间维持长期电弧放电所需的降低的功率电平（PR），并且灯以该下冲功率电平（Pu）被驱动用于下冲功率 在再次提高灯功率（P）以接近降低的功率电平（PR）之前的持续时间（tu）。 此外，本发明描述了用于驱动高压放电灯（1）和图像渲染系统（40）的合适的驱动单元（4），特别是包括这种驱动单元（4）的投影仪系统。