Petluri
Raghuram L.v. Petluri, Sunnyvale, CA US
Patent application number | Description | Published |
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20110216522 | Efficient LED-Based Illumination Module With High Color Rendering Index - An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm. | 09-08-2011 |
20120099290 | EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX - An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm. | 04-26-2012 |
20120224177 | LED BASED ILLUMINATION MODULE COLOR MATCHED TO AN ARBITRARY LIGHT SOURCE - LED based illumination modules are realized that are visually color matched to light sources not based on LEDs based on visually matched color spaces. A visually matched color space is employed to both instrumentally and visually match an LED based light source with a light source not based on LEDs. In one aspect, an LED based illumination module is realized to achieve a target color point in a visually matched color space within a predetermined tolerance. In another aspect, an LED based illumination module is realized to visually match a light source not based on LEDs. A target color point in the CIE 1931 XYZ color space is derived based at least in part on the spectrum of the visually matched LED based illumination module. LED based illumination modules visually matched to light sources not based on LEDs are realized based on the derived target color point. | 09-06-2012 |
Raghuram L.v. Petluri, Arlington Heights, IL US
Patent application number | Description | Published |
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20130343034 | EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX - An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm. | 12-26-2013 |
20150184813 | EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX - An illumination module emits light from at least one light emitting diode (LED) with a peak wavelength between 380 nanometers and 460 nanometers that is converted to a second colored light by interaction with at least four different photo-luminescent materials in a light conversion sub-assembly. A first photo-luminescent material has a peak emission at a wavelength that is within 55 nanometers of the peak wavelength of the light emitted from the LED. A second photo-luminescent material has a peak emission at a wavelength greater than 650 nanometers. A third photo-luminescent material has a peak emission at a wavelength that is more than 20 nanometers greater than the peak emission wavelength of the first photo-luminescent material. A fourth photo-luminescent material has a peak emission at a wavelength that is at least 20 nanometers less than the second photo-luminescent material. | 07-02-2015 |
Raghuram L.v. Petluri, Cerritos, CA US
Patent application number | Description | Published |
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20150316218 | EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX - An illumination module includes a light mixing cavity with an interior surface area and window that are physically separated from an LED. A portion of the window is coated with a first wavelength converting material and a portion of the interior surface area is coated with a second wavelength converting material. The window may be coated with LuAG:Ce. The window may also be coated with a third wavelength converting material with a peak emission wavelength between 615-655 nm where the spectral response of light emitted from the window is within 20% of a blackbody radiator at the same CCT. The LED may emit a light that is converted by the light mixing cavity with a color conversion efficiency ratio greater than 130 lm/W where the light mixing cavity includes two photo-luminescent materials with a peak emission wavelengths between 508-528 nm and 615-655 nm. | 11-05-2015 |