Ref.CE-P3410 12/04

2-3. Chromaticity Characteristics

4

2700K

( 0.4577 , 0.4098 )

3000K

( 0.4339 , 0.4032 )

4000K

( 0.3818 , 0.3796 )

5000K

( 0.3446 , 0.3551 )

(Ref. IEC 60081:1997 AnnexD)

( Tc=65C )

Color Region

Nominal

CCT

Center Point

( x, y )

Oval parameter

Major Axis

a

Minor Axis

b

Ellipse

Rotation Angle

θ

0.00834

0.00408

53.17

* Color region stay within MacAdam 3-step ellipse from the 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.

3-step MacAdam ellipse

0.00774

0.00411

57.28

0.00939

0.00402

54.00

0.00822

0.00354

59.62

0.30

0.35

0.40

0.45

0.30

0.35

0.40

0.45

0.50

x

x-y chart CIE1931

4,000K

3,000K

2,700K

5,000K

Black

Body

Locus