Barco OVERVIEW D 50" Installation Manual page 85

8.5.4.3 Degamma
Use Service | Color/Brightness | Degamma to change the gamma value.
A list of the available gamma values pop up. The current setting is indicated by a white dot.
Disable applies a gamma value of "1"
For OverView D series, do NOT use any of the TI gamma values.
gamma = 2.7 should be used with utmost care!
Influence of White Peaking on Gamma
For DLP projection engines which use the white segment and spoke light recapture, the influence of the gamma
value on white and on gray levels is much higher. The primary colors and secondary colors are not affected. The
following table shows the selected gamma value and its effective equivalent:
gamma value (White Peaking value = 0)
1.0
2.0
2.2
2.3
2.7
Due to the White Peaking, for white and gray (R=G=B) even a gamma value of "1"
(disabled) results in a non-linear effective gamma curve and thus in a non-linear
response.
OverView D 50" – DOC-3303-5 – installation manual – Revision 10 – September 2006
effective gamma value (White Peaking value = 10)
1.6
3.2
3.4
3.6
4.0
September 2006 ________________________________ ________________________________________________________
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September 2006 September 2006
8. Final Adjustment and Configuration
list of available gamma values
________________________ 8-17
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Figure 8-20