Christie M Series User Manual Download

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Section 3: Operation

M Series User Manual

3-31

020-100009-05 Rev. 1 (09-2010)

• DYNAMIC IRIS POSITION

Set the fixed manual Dynamic Iris position as a percentage of fully open.

• MODE

Set the Dynamic Iris Mode for the current channel.

Off

will place the Dynamic Iris in a fully open position.

Manual

mode allows the user to adjust the level of light to statically increase the black levels.

Dynamic

mode

allows the Dynamic Iris to open/close based on the frame content and Dynamic Iris Settings control. This will
produce optimal black levels.

NOTE:

On DLV projector models, the Dynamic mode of the Dynamic Iris is not

available. In Constant Intensity mode, Dynamic Iris control is disabled on the menus. In Constant Power
mode, only manual Dynamic Iris control is available.

• DYNAMIC IRIS SETTINGS

There are 3 predefined settings: ‘Dark Scenes’, which produces high contrast ratios, is for movies primarily
consisting of dark content, i.e. thriller or horror scenes. ‘Medium Scenes’ is for video content containing a
moderate level of dark scenes, i.e. action movie. ‘Light Scenes’ is for movies containing only a few dark
scenes, i.e. animation or a PC source. The 4 User settings allow you to fine tune the Dynamic Iris and save
your own settings.

• SENSITIVITY

Adjusts how sensitive the Dynamic Iris control algorithm is to small bright objects entering and leaving an
image, such as stars or candles. With a lower sensitivity value these small bright objects are more likely to be
ignored, producing a more stable light level for the image, with the side effect that some detail in those bright
objects will be lost. It is often best to adjust the sensitivity and white compression together to find the optimal
settings.

• OPEN SPEED

The open speed of the Dynamic Iris represents the maximum Dynamic Iris change per frame. Increasing this
value will allow the Dynamic Iris to travel further in a frame. Decreasing this value will allow for a more
gradual change. A slower value will reduce any flicker in the image, but it will also mean that the Dynamic Iris
will not react quickly to a scene that suddenly becomes much brighter; resulting in a image that will show a
significant loss of detail for several frames.

• CLOSE SPEED

The close speed of the Dynamic Iris represents the maximum Dynamic Iris change per frame. Increasing this
value will allow the Dynamic Iris to travel further in a frame. Decreasing this value will allow for a more
gradual change. A slower value will reduce any flicker in the image, but it will also mean that the Dynamic Iris
will not react quickly to a scene that suddenly becomes much darker, resulting in an image that does not have
as much contrast as it could for several frames.

• WHITE COMPRESSION

The level of white compression adjusts amount of detail in bright parts of dark scenes. It does not eliminate the
detail in affected areas (as the sensitivity control does) but merely reduces it. The amount of detail reduction
depends on the average level of brightness in the scene, and the setting of this control. The brighter the scene
the less impact this control will have. It is often best to adjust the sensitivity and white compression together to
find the optimal settings.

• COPY FROM

This control allows you to copy the Dynamic Iris Settings from an existing profile to the current profile.