Method for activating a deflection device for a projection device, a deflection device for a projection device, and a projection device

US9832434B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Ulrich Hofmann · Itzehoe, DE
• Frank Senger · Kaufbeuren, DE
• Thomas von Wantoch · Kiel, DE
• Christian Mallas · Schwentinental, DE
• Joachim Janes · Itzehoe, DE
• Manfred Weiss · Bad Liebenzell, DE

Key dates

• Filing date: Sep 29, 2015
• Grant date: Nov 28, 2017
• Expiry date: Dec 22, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/104
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A method for activating a deflection device comprising at least one deflection unit, for a projection device for projecting trajectories upon a projection surface, wherein the deflection device deflects electromagnetic radiation which is directed upon it, for producing trajectories, and the at least one deflection unit is activated by way of an activation signal delivered from a control device, for producing oscillations in each case with a turning amplitude at a direction change of the oscillation, about at least one deflection axis, wherein in the case of resonance, the oscillations have a maximal amplitude, at which the produced trajectories reach an edge of the projection surface. The activation signal is set in a manner such that the turning amplitude of the oscillations at least temporarily has a predefined value outside a region of the maximal amplitude of the oscillations, and an intensity distribution of the produced trajectories on the projection surface is achieved with a predefined intensity pattern. The document moreover relates to a deflection device as well as to a projection device.