2-3. Chromaticity Characteristics
( Rated current, Tj=85C )
Oval parameter
Nominal
CCT
Center Point
Ellipse
Rotation Angle
Color Region
Major Axis
a
Minor Axis
b
( x, y )
θ
0.00774
0.00834
0.00951
0.00939
0.00822
0.00411
0.00408
0.00417
0.00402
0.00354
57.28
2,700K
3,000K
3,500K
4,000K
5,000K
( 0.4436 , 0.3843 )
( 0.4216 , 0.3773 )
( 0.3980 , 0.3673 )
( 0.3749 , 0.3545 )
( 0.3427 , 0.3322 )
53.17
52.97
54.00
59.62
3-step MacAdamellipse
* Color region stay within MacAdam3-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
Black
Body
0.40
Locus
2,700K
3,000K
3,500K
0.35
0.30
4,000K
3-step
[ Brilliant ]
5,000K
0.30
0.35
0.40
0.45
0.50
x
Note : Citizen Electronics maintains chromaticity ( x, y ) +/-0.005
4
Ref.CE-0148P-201801