Runco QUANTUM Q-750D - Manual (Page 77)

Operation
Q-750d Series Installation/Operation Manual 61
PRE
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IMINAR
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If excess ambient light washes out the image and it becomes difficult or impossible to
see details in dark areas, lower the gamma setting to compensate. This improves
contrast while maintaining good details for blacks. Conversely, if the image is washed
out and unnatural, with excessive detail in black areas, increase the setting.
• Color Temp: Select Color Temp from the Display Color menu to adjust the color
temperature. Color temperature establishes the “color of gray” by adjusting the 75%
white point to various color points.
What are “color points?” A “color point” is an x/y coordinate pair that defines a
color’s location on the standard CIE chromaticity graph, shown in Figure 4-7. (CIE
stands for “Commission Internationale de l’Éclairage” (International Commission on
Illumination), the organization responsible for color measurement and management
standards.)
Figure 4-7. CIE 1931 Chromaticity Diagram
• Simple: Select Simple mode from the Color Temp menu (with the Q-750d, this is
the only choice) to choose one of four color temperature presets: 5500K, 6500K,
7500K and 9300K. The default setting, 6500K, is appropriate for most situations.
Higher settings produce a “bluer” picture; lower ones impart a reddish hue to the
image.
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
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x
y
2000 2222 2500 2857
3333
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5714
6667
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10000
D50
D65
D93