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8.6.3.3 Example for using the CLO feature for maintaining brightness over time
Maintaining the brightness
•
Adjust lightsource power to desired setting, e.g. 80%
•
Enable the CLO
•
The projector will maintain the brightness at 80%
The CLO adjusts the power to the light source to maintain the light output over time. As there is a degradation
over time in both optical components and light source, the time frame the CLO can maintain the light output is
dependent on how much initial headroom is available. I.e. if the power is set to 90%, the initial headroom will
be more quickly spent by the degradation and the time frame for which the CLO can keep the desired
brightness will be lower than for e.g. starting at 80%. See example below.
Image 8–73 The time scale is only used as an example and does not represent real-life data.
The time scale is only used as an example and does not represent real-life data.
8.6.4 CLO scale
8.6.4.1 CLO scale
CLO scale
The CLO scale feature enables linear dimming. The light source power of the projector is not linear, so
adjusting it to e.g. 50% could result in a different light output than the desired 50% of the initial light output.
The lack of linearity could result in it deviating up to 5% from the desired target. The CLO scale ensures that
the dimming scale is linear, meaning that the desired output level of the light source will be the same as the
setting in the projector.
Having the light source power dimming linear also enables it to be used to set the same power value to
multiple projectors.
The same prerequisites apply for this feature regarding the degradation of the light source and the initial set-
point chosen for the light source power.
The CLO scale can be set and / or monitored using the property:
•
illumination.clo.scale
Содержание F400
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