Projection device and method for projecting at least one image onto a projection surface

US10073335B2 · kind B2 · utility

Assignee

• OSRAM GmbH · DE

Inventors

• Marc Czichy · Berlin, DE
• Michael Heise · Erbach, DE
• Markus Baier · Munich, DE
• Norbert Magg · Berlin, DE
• Daniel Sixtensson · Potsdam, DE

Key dates

• Filing date: Sep 29, 2015
• Grant date: Sep 11, 2018
• Expiry date: Sep 29, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

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.