Bedienungsanleitung Optoma HQView-300 Series (Seite 24 von 30) (Englisch)

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3.10. Multiple Unit

The HQView-310 and HQView-320 have a Multiple Unit menu to set up each unit for use in a multi

screen application.

Multiple screens are stitched together to provide a bigger display with higher resolution than a single

display. Each display is driven by a separate HQView unit. Each HQView unit gets the same graphics or

video input signal through a distribution amplifier. The HQView unit cuts out and resizes the image to

display the part of the image assigned to the corresponding screen. In a multi projection display the

individual projections typically are chosen to overlap to give seamless transitions. Overlapping regions

are illuminated by multiple projectors and are brighter than non-overlapping regions. For a uniform

brightness over the total display the brightness in the overlapping regions has to be reduced

electronically.

Important: When using multiple HQView units to drive one single large screen, it is essential that all

HQView units are I/O locked, otherwise motion tear will be observed at the boundaries of the image

processed by each HQView unit. It is also essential that all HQView units are setup for the same

processing latency (either all units are in Best Picture mode or all units are in Low Latency mode).

3.10.1. Auto Zoom

Settings: On, Off

Switches on the auto zoom resizing the video image to display the assigned part of the total image.

AutoZoom is switched off automatically when the on-screen menu is activated and that menu cannot be

properly displayed. The menu is scaled to a certain extend by the warp engine and may exceed the size

of the screen. Also, only the active video area can be used for the on-screen menu. This would crop the

menu and make it impossible to navigate. A message will indicate such situations. After having done the

change AutoZoom can be reactivated.

3.10.2. Units Wide/Units High

Settings: 1, 2, 3, 4/ 1, 2, 3, 4

Provides the HQView unit information of the multi screen installation. The number of horizontally and

vertically installed screens or projectors is entered.

3.10.3. Horizontal Pos/Vertical Pos

Settings: 0 to (Units Wide – 1) in steps of 1/ 0 to (Units High – 1) in steps of 1

Provides the HQView unit information which window of the total image it is assigned to and has to

process (cut out and resize).

3.10.4. Blend Width

The blend width menu provides sliders to set up the overlap region for left, right, top and bottom blend

region. The overlap is set up in output pixels with a range of up to a quarter of the output resolution. For

a configuration with two projectors in horizontal direction the overlap can be higher to allow 16:9 images

to fit on two combined projectors with an aspect ratio of 4:3 or 5:4.

An offset for the blend region can be set-up as well. The region between the edge and the start of the

blend area is black. The total pixels of blend area and offset region is limited by the same amount of

pixels as for an offset of zero.

Note: Each HQView unit needs to be provided with the exact same value for left and right blend region.

Top and bottom blend region have to be identical as well, but don´t need to have the same value as left

and right. The HQView units do not communicate between each other and thus they have to make an

assumption for auto zoom calculations and that is overlap of the neighbouring (and those beyond)

projectors is identical.

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