公开(公告)号：US10362281B2

公开(公告)日：2019-07-23

申请号：US15289219

申请日：2016-10-10

Applicant: OSRAM GmbH

Inventor： Michael Heise ,  Marc Czichy ,  Bastian Dobler

IPC: H04N9/31

Abstract: A projection apparatus includes a discharge lamp; a control apparatus for controlling a discharge current through the lamp. The apparatus is designed in a first drive mode, to control the discharge current having an amplitude profile; in a second drive mode, to control the discharge current in accordance with the amplitude profile; and to change between the first mode and the second mode. The time difference between two changes is given by a first time interval, and the time difference between the change from the first mode to the second mode and a next instance of leaving the second mode is given by a second time interval. The apparatus further includes a control device to determine a first manipulated variable depending on a control deviation determined by the difference between a target voltage value and a measured voltage value, and to determine the first and/or the second time interval therefrom.

公开(公告)号：US20170104966A1

公开(公告)日：2017-04-13

申请号：US15289219

申请日：2016-10-10

Applicant: OSRAM GmbH

Inventor： Michael Heise ,  Marc Czichy ,  Bastian Dobler

IPC: H04N9/31

CPC classification number: H04N9/3155 ,  H04N9/3114 ,  H04N9/3182

Abstract: A projection apparatus includes a discharge lamp; a control apparatus for controlling a discharge current through the lamp. The apparatus is designed in a first drive mode, to control the discharge current having an amplitude profile; in a second drive mode, to control the discharge current in accordance with the amplitude profile; and to change between the first mode and the second mode. The time difference between two changes is given by a first time interval, and the time difference between the change from the first mode to the second mode and a next instance of leaving the second mode is given by a second time interval. The apparatus further includes a control device to determine a first manipulated variable depending on a control deviation determined by the difference between a target voltage value and a measured voltage value, and to determine the first and/or the second time interval therefrom.