ILLUMINATION DEVICE HAVING COLOUR SEPARATING PANEL FOR RECYCLING REDUNDANT LIGHT Russian patent published in 2012 - IPC H04N9/31 

FIELD: information technology.

SUBSTANCE: light source (100) includes at least one light-emitting diode (LED) (104), e.g., in a LED matrix which generates short wavelength light. One or more wavelength converting elements (114A), e.g., luminophor elements, convert at least a portion of the short wavelength light from the LED (104) into longer wavelength, e.g., red or green. A dichroic element (110), placed between a LED and wavelength converting element(s), transmits light from the LED and reflects longer wavelengths from the wavelength converting element(s). The colour selection panel (120) selects the colour of light to be formed using the light source (100) and which has to be recycled for another option for conversion by the wavelength converting element(s) (144A) or for reflection by the dichroic element (110). The colour selection panel (120) can operate in one or both spatial and time domains.

EFFECT: reduced volume and higher energy-efficiency of light sources.

15 cl, 10 dwg