User manual

Section 3: Operation

3-70 Mirage S+/HD/WU, Matrix S+/HD/WU, Christie HD/DS+/DW, DLV User Manual

020-100001-07 Rev. 1 (11-2009)

Figure 3.22. Set Starting Points for Each Projector

4. SET BLEND WIDTH: On one projector, increase the Blend Width for an overlapping

edge (for example, if the projector’s image is on left, its right edge overlaps the

adjacent image—adjust Right Blend Width). Use the same setting on the second

projector for this shared edge.

5. Re-adjust width (both projectors) until the overly bright band at the midpoint of the

overlapping blends disappears or just changes to very light gray. For the shared

edge, use the same Blend Width setting on each projector. If the “best blend”

appears to be between two settings, choose the wider setting for both projectors.

CHECK BLEND: If the blended region appears too dark or light in relation to the rest

of the image:

 Increase Blend Midpoint in both projectors to “lighten” the overall blend,

decrease to “darken” the overall blend.

 Adjust Blend Shape in both projectors to fine-tune change the amount of mid-

gray intensity (as opposed to black/white) in the blend.

7. Repeat with remaining projectors / overlaps.

8. Check completed display wall with the desired external signal.

9. Adjust mechanical alignment if necessary to maintain perfect pixel-on-pixel

alignment over time.

In applications where you are projecting only white or light images, the Blend Width

may be slightly higher—set according to how much overlap you have between

images. Use the following as a guide (examples show overlapping width only—values

for overlapping height will differ):

 Recommended overlap is 12.5% - 25%

Similar to Edge Blending, Black Level Blending allows you to adjust the black level

hues of multiple adjacent projected images to create one large seamless display. Edge

blending must be enabled in order to use the Black Level Blending features.

The use of Black Level Blending feature and the use of Christie TWIST module are

mutually exclusive. On WU models, Keystone is only available when Christie TWIST

is in use. If Christie TWIST is installed and Black Level Blending is desired:

1. Disable use of warps or 2D Keystone.

2. Enable edge blending; if not enabled.

3. Enable Black Level Blending.

4. Power down the projector then power up again.

Black Level Blendin

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