Method for defining the color group of an LED and LED module

Details Method for defining the color group of an LED and LED module Method for defining the color group of an LED and LED module

2005-05-31

2005-05-31

Pham, Long (Department: 2814)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

Plural light emitting devices

C356S402000, C356S406000

Reexamination Certificate

active

06900471

ABSTRACT:
Method for defining the color group of an LED which emits mixed-color, in particular white, light. The CIE color space is divided by means of a network with two sets of intersecting network lines, one set being provided by a set of Judd straight lines and the other set by the line for the color loci of a Planckian radiator and also the associated lines of constant threshold value deviation, so that the network has a plurality of network cells bounded by network lines. The color locus of the LED is determined, and the network cell is determined in which the color locus of the LED is located. The LED is assigned to the color group of the network cell.

REFERENCES:
patent: 5521708 (1996-05-01), Beretta
patent: 5770917 (1998-06-01), Yano et al.
K. Mahr et al., “Ein auf den Planckschen Strahler bezogenes Koordinatensystem für die Farbart”, Technish-wissenschaftliche Abhandlungen der Orsram Gesellschaft (1969) vol. 10, p. 283-292.
International Commission on Illumination, “Method of Measuring and Specifying Colour Rendering Properties of Light Sources”, Publication CIE No. 13.2, 1974 pp. 29-30.
Dr. Yoshi Ohno, “OSA Handbook of Optics, vol. III Visual Optics and Vision Chapter for Photometry and Radiometry” Oct. 20, 1999, pp. 10-13.
International Commission on Illumination, “COLORIMETRY”, Second Edition, Publication CIE No. 15.2, 1986, pp. 38 and A1.

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