BLUE LASER PUMPED GREEN LIGHT SOURCE FOR DISPLAYS
First Claim
1. An apparatus for emitting green light comprising:
- a semiconductor diode laser emitting light in an optical path having a dominant wavelength within the blue spectral region;
a substrate positioned in the optical path of the semiconductor diode laser; and
a material coupled to the substrate selected to absorb light emitted by the semiconductor diode laser and, in response, to emit light having a dominant wavelength within the green spectral region.
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Abstract
The invention relates to light sources and displays incorporating blue laser pumped light sources that provide green light. According to a first aspect of the invention, a green light source includes a semiconductor diode laser emitting light in an optical path having a dominant wavelength within the blue spectral region, a substrate positioned in the optical path of the semiconductor diode laser, and a material coupled to the substrate. The material is selected to absorb light emitted by the semiconductor diode laser and, in response, to emit light having a dominant wavelength within the green spectral region. According to a second aspect of the invention, an apparatus includes a lighting module for a display, the lighting module includes an array of red laser light sources, an array of blue laser light sources, and an array of green light sources according to the first aspect of the invention.
16 Citations
22 Claims
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1. An apparatus for emitting green light comprising:
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a semiconductor diode laser emitting light in an optical path having a dominant wavelength within the blue spectral region; a substrate positioned in the optical path of the semiconductor diode laser; and a material coupled to the substrate selected to absorb light emitted by the semiconductor diode laser and, in response, to emit light having a dominant wavelength within the green spectral region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising at least one lighting module for a display, the at least one lighting module including:
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an array of red laser light sources; an array of blue laser light sources; and an array of green light sources, each of the green light sources comprising a semiconductor diode laser emitting light in an optical path having a dominant wavelength within the blue spectral region, a substrate positioned in the optical path of the semiconductor diode laser, and a material coupled to the substrate selected to absorb light emitted by the semiconductor diode laser and, in response, to emit light having a dominant wavelength within the green spectral region. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification