Lighting with white LED before supply without screening, CITIZEN electronics to improve the color standard 90%

CITIZEN Electronics (Headquarters: Yamanashi City, Yoshida, Fuji) announced that the company in the production of white LED in the lighting, the color management standard McAdam elliptical 3-STEP range narrowed to the original 1/9. Although the white LED for lighting needs strict color management, but the same batch of color will still appear deviation, so before the need for screening. Therefore, reducing the color deviation has become a major issue.

LED color management generally adopted by the American Standards Institute LED lighting product range of color standards ANSI C78.377". CITIZEN electronics use after the accumulation of basic research, precision machining technology and manufacturing technology, based on the specific color coordinate deviation management to obtain accurate color, to achieve a production more than ANSI C78.377 follow strict color management standard: McAdam 3-STEP standard ellipse. McAdam ellipse 3-STEP is David Lewis MacAdam according to the visual color test management standards, in the XY chromaticity diagram for the identification of specific central color change standard deviation. Define the color range that is indistinguishable from a central color.

In accordance with this standard of mass production products will not need to be screened before delivery, can improve the manufacturing efficiency, while the purchase of the manufacturer can also specify the LED light-emitting color, improve the quality of lighting products. Support McAdam elliptical 3-STEP packaging are "CL-L103", "CL-L251" and "CL-L233" these three series, color temperature 4000K, 3500K, 3000K and 2700K four kinds of LED. We are scheduled to supply samples from April 2010, and mass production in June. CITIZEN electronics, said the support of the LED packaging and color temperature will continue to increase.

Can be more stringent color management