Solid state lighting systems using oleds
AssigneeCree, Inc.
InventorPaul Kenneth Pickard
Life of this patent
Estimating the term…
Abstract
Solid state lighting systems using organic LEDs (OLEDs) are disclosed. Embodiments of the present invention provide a solid state lighting system and a luminaire wherein substantially white light is generated by a combination of an organic LED (OLED) and another type of solid state emitter. The other type of solid state emitter may be, for example, a conventional LED made from inorganic materials. The OLED is positioned so that substantially white light is emitted from the lighting system by mixing light from the two types of sources. In some embodiments, a dichroic mirror can also be used at the opening of a mixing chamber to prevent absorption of light from the OLED back into the mixing chamber or conventional LEDs within the mixing chamber.
Claims29
A lighting system comprising:
- at least one solid state emitter configured to emit light of a first color when energized;
- and
- an organic light emitting diode (OLED) configured to emit light of a second color when energized, the OLED positioned so that when the at least one solid state emitter and the OLED are energized the first and second colors of light mix.
An LED luminaire comprising:
- a plurality of blue-emitting LEDs in a mixing chamber;
- phosphor to form yellow light by wavelength conversion of a portion of the light from a blue-emitting LED;
- and
- an organic LED (OLED) that, when energized, emits red light, the OLED disposed at an opening of the mixing chamber so that the red light and blue-shifted yellow (BSY) light mix to for form substantially white light emitted from the LED luminaire.
A method of assembling a luminaire, the method comprising:
- providing a plurality of emitters configured to emit light of a first wavelength;
- providing a mixing chamber with an opening that light from the plurality of emitters passes through;
- installing an organic LED (OLED) configured to emit light of a second wavelength at the opening of the mixing chamber;
- connecting the mixing chamber to a heat sink;
- and
- providing power connections to the plurality of emitters and the OLED.
Dependencies are inferred from the claim text.