Lighting device comprising a plurality of controllable light-emitting diodes

US8299716B2 · kind B2 · utility

Assignee

• ARNOLD & RICHTER CINE TECHNIK GMBH & CO. BETRIEBS KG · DE

Inventors

• Erwin Melzner · Kirchseeon, DE
• Regine Kraemer · Munich, DE
• Michael Haubmann · Wien, AT
• Johann Hochreiter · Neulengbach, AT

Key dates

• Filing date: Aug 20, 2008
• Grant date: Oct 30, 2012
• Expiry date: Oct 12, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A lighting device comprising a plurality of lighting modules which include a module carrier on which a light source with a plurality of controllable light-emitting diodes emitting light of different wavelengths and arranged on a board, a temperature sensor and a module electronic are arranged. Said module electronic contains a digital circuit with a microcontroller for the local and autonomous signal processing, which actuates the LEDs in dependence on the temperature such that the brightness, color and chrominance of the light mixture composed of the LEDs emitting light of different wavelengths is constant. Said lighting modules being connected with other lighting modules or an external controller via a digital interface for transmitting the board temperature of the respective lighting module detected by means of the temperature sensor. A central master module or the external controller actuates the lighting modules such that a uniform brightness is obtained over the radiating surface.