HDJD-JD06 Avago Technologies US Inc., HDJD-JD06 Datasheet - Page 10

• Manufacturer Part Number: HDJD-JD06
• Description: KIT DEV RGB COLOR SENSOR 16-QFN
• Manufacturer: Avago Technologies US Inc.

Specifications of HDJD-JD06

• Sensor Type: Light, Color Sensor
• Sensing Range: RGB
• Interface: Analog
• Voltage - Supply: 4.5 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADJD-E622-QR999
• For Use With/related Products: ADJD-E622-QR999
• Lead Free Status / RoHS Status: Not applicable / Not applicable

XYZ -> Yxy
The tristimulus values X, Y and Z define a color in the CIE
XYZ space. The CIE XYZ is a 3D linear color space, and
the results are not easily visualized. Because of this, CIE
also defined a color space in 1931 for graphing color in
2D independent of lightness, the Yxy color space. The
Y is the lightness component of color while the xy are
the chromaticity coordinates calculated from the XYZ
tristimulus values. The concept of color can be divided
into two parts: brightness and chromaticity. For example,
the color white is a bright color, while the color grey is
considered to be a less bright version of that same white.
In other words, the chromaticity of white and grey are
the same while their brightness differs.
The x and y are calculated based on the following for-
mula:
Y is identical to tristimulus value Y.
XYZ -> L*a*b*
CIE L*a*b* (CIELAB) is the most complete color model
used conventionally to describe all the colors visible to
the human eye. The three parameters in the model rep-
resent the lightness of the color (L*, L*=0 yields black and
L*=100 indicates white), its position between magenta
and green (a*, negative values indicate green while posi-
tive values indicate magenta) and its position between
yellow and blue (b*, negative values indicate blue and
positive values indicate yellow).
CIE 1976 L*a*b* is based directly on the CIE 1931 XYZ
color space as an attempt to linearize the perceptibility
of color differences, using the color difference metric de-
scribed by the MacAdam ellipse. The non-linear relations
for L*, a*, and b* are intended to mimic the logarithmic
response of the eye.
10
CIE xy chart
The CIE xy chart can be access in the following 2 ways:
1. Click on CIE xy Chart button at features section at the
2. Click menu View -> CIE xy Chart.
To view the CIE xy chart real time, user had to activate
the color chart/ conversion. Then a circle will appear
showing the color measured by the color sensor at the
CIE xy chart.
main GUI.
Method 2
Circle (Color Space Indicator)
Method 1
CIE xy coordinate