公开(公告)号：US10073335B2

公开(公告)日：2018-09-11

申请号：US15517176

申请日：2015-09-29

Applicant: OSRAM GmbH

Inventor： Marc Czichy ,  Michael Heise ,  Markus Baier ,  Norbert Magg ,  Daniel Sixtensson

IPC: G03B21/00 ,  G03B21/20 ,  H05B41/36 ,  H04N9/31 ,  H05B41/292

CPC classification number: G03B21/206 ,  G03B21/005 ,  G03B21/006 ,  G03B21/2026 ,  H04N9/3155 ,  H05B41/2888 ,  H05B41/2928 ,  H05B41/36 ,  Y02B20/202

Abstract: A projection device for projecting at least one image onto a projection surface is provided. According to the present disclosure, a control device of the projection device is designed, on the basis of an evaluation of at least one measured value of a measuring device of the projection device determined during a drive of a discharge lamp of the projection device with a current waveform to be checked, to check the current waveform in respect of its suitability for minimizing an electrode burn-back of a first electrode and a second electrode, and in the case of a positive check result, to retain the checked current waveform, and in the case of a negative check result, depending on a checked commutation vector characterizing the checked current waveform, to create, by means of a specifiable algorithm, a modified commutation vector that characterizes a modified current waveform.

公开(公告)号：US20170299954A1

公开(公告)日：2017-10-19

申请号：US15517176

申请日：2015-09-29

Applicant: OSRAM GmbH

Inventor： Marc Czichy ,  Michael Heise ,  Markus Baier ,  Norbert Magg ,  Daniel Sixtensson

IPC: G03B21/20 ,  G03B21/00 ,  H05B41/36

CPC classification number: G03B21/206 ,  G03B21/005 ,  G03B21/006 ,  G03B21/2026 ,  H04N9/3155 ,  H05B41/2888 ,  H05B41/2928 ,  H05B41/36

Abstract: A projection device for projecting at least one image onto a projection surface is provided. According to the present disclosure, a control device of the projection device is designed, on the basis of an evaluation of at least one measured value of a measuring device of the projection device determined during a drive of a discharge lamp of the projection device with a current waveform to be checked, to check the current waveform in respect of its suitability for minimizing an electrode burn-back of a first electrode and a second electrode, and in the case of a positive check result, to retain the checked current waveform, and in the case of a negative check result, depending on a checked commutation vector characterizing the checked current waveform, to create, by means of a specifiable algorithm, a modified commutation vector that characterizes a modified current waveform.