2-3. Chromaticity Characteristics
( Tc=65C )
Ellipse
Oval parameter
Nominal
CCT
Center Point
Color Region
Major Axis
a
Minor Axis
b
( x, y )
Rotation Angle
θ
0.00774
0.00834
0.00939
0.00822
0.00411
0.00408
0.00402
0.00354
57.28
2700K
3000K
4000K
5000K
( 0.4577 , 0.4098 )
( 0.4339 , 0.4032 )
( 0.3818 , 0.3796 )
( 0.3446 , 0.3551 )
53.17
54.00
59.62
3-step MacAdamellipse
* Color region stay within MacAdam 3-step ellipse fromthe chromaticity center.
* θ is the angle between the major axis of the ellipse and the x-axis, and a and b are the major and minor semi-axes of an ellipse.
(Ref. IEC 60081:1997 AnnexD)
x-y chart CIE1931
0.45
2,700K
3,000K
Black
Body
Locus
4,000K
0.40
0.35
0.30
5,000K
0.30
0.35
0.40
0.45
0.50
x
4
Ref.CE-P3410 12/04
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