686 results about "Black body" patented technology

Disclosed herein is a light fixture. The light fixture includes at least one first light source that emits at a peak wavelength in a range of approximately 380 nm to approximately 420 nm and at least one second light source that emits at a different peak wavelength, wherein a combined light output of the at least one first light source and the at least one second light source emits a colored light that is perceived as white light. The white light is defined by having a color rendering index (CRI) value of more than approximately 50. The at least one second light source that emits at a different peak wavelength consists of an xy coordinate on a International Commission on Illumination (CIE) 1931 xy color space diagram above a black body curve within a bounded area defined by a first line of approximately y=2.23989x−0.382773 and a second line of approximately y=1.1551x−0.195082. The combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 20%.

A method of adjusting the N components of an N component color signal (such as the 3 components of an RGB color signal) with respect to color temperature of illuminating light when imaging a colored subject, comprising the step of computing the difference between each of the components of the color signal for different temperatures of illuminating light, using an algorithm based on the spectral sensitivity of the imaging means and Planck's equation defining black body illumination to obtain N components whose values are independent of the color temperature of the illuminating light. Normalisation of the adjusted values renders the values independent of intensity of illumination and can also reduce the processing time for further processing of the signals. A technique for compensating for gamma correction which is commonly built in cameras, is disclosed.

The present invention relates to a system, method and tool for optimizing combination of Light Emitting Diodes (LEDs), and to an optimized combination of LEDs. The system and method provide a plurality of LEDs and corresponding specifications. Then, a color temperature and a color rendering index are selected. Calculations are performed for subgroups of LEDs. At least one optimized combination of LEDs having an optimized corresponding luminous flux is identified according to selected color temperature, color rendering index and LEDs' specifications. In another aspect, the present invention relates to a tool for optimizing white light generated by a combination of LEDs. The tool comprises a repository for storing specifications for the combination of LEDs, a selection module for selecting at least one of the following parameters: a color temperature, a color rendering index and a maximum shift variance from a black body locus, and a processing module for calculating for subgroups of LEDs resulting color temperature, color rendering index, luminous flux, and for identifying an optimized selection of LEDs. The present invention also relates to an optimized combination of LEDs for producing white light with high color rendering index, the combination of LEDs excluding blue LEDs.