6 Screens Rear projection screen requirements Viewable from all angles High contrastFocusedMinimal reflectionCleaning of screens :Avoid to touch screens !!!!See user manual for cleaning instructions.HVA screenThe screen has a very good contrast level and wide viewing angles. The screen is recommended for all applications except where speckle is an issue.HVM screen (cross prism screen)While featuring higher brightness and about the nearly complete absence of speckles, this screen is softer and is more susceptible to color differences between screens. Thus the screen is recommended mainly for utilities applications with black background or for video intensive applications where the tiling color/brightness uniformity is less an issue, e.g. in non-backdrop broadcast applications or surveillance applications.HVX screen (single prism screen)This screen has a very high gain and consequently a very high brightness on-axis. This luminance level is most probably not in sync with the luminance level of other task areas in the control room. Due to the non-adequate luminance level, the big differences between brightness on-axis and off-axis, and due to the low vertical half gain angle and the trend to some ghost images.
7 Screens Screens can be mounted in different ways. Expand/shrink due to temperature and moistureCannedMinimal gap between screensVisible gapOnly 50” and front access 70 “Canned – seamlessNo gapScreens push against each otherOnly 50”StitchedSmall needle like wires hold the screens togetherNo gapsOnly from 70” onwardsBoth Seamless Canned and Stitched technology allow the screens to move, expand and contract, when the ambient conditions for the control wall change.Canned seamless: screens are pushed together with a spring system in the screen structure, the screens are not connected to each otherStitched: screens are stitched together with metal thread at time of installation.
8 Components : Projection Unit DVI 1 with loop throughDVI 2 with loop throughLAN interface (<-> GH1 Serial interface)Communication + power Interface to IULens (Two possible types XGA <> SXGA)Sealed optics coreCooled housing containing al electronics:PICO 4 board2nd input board (dual link DVI)formatter Board with DMD chip
9 Projector AlignmentCorrect geometry on the screen by tilting the projector in its frameService personnel only !Don’t touch screws that are fixed with Red paint. They are never needed for adjustments.Best sequence for alignment:KeystoneShiftRotateRepeat from Keystone until alignment is satisfactory
10 Components : Illumination unit Part list:Top lamp doorBottom lamp doorGlass window in lamp doorAir filter padMains Power SwitchStandby / Reset switchLamp selection switchLCD displayLight interface to PU with UV blocking filterAir interface to PUCommunication/power Interface to PUPower connection for mains cable
11 Components : Dual Lamp system 120W/132W lamptwo lamps in each projectorSwitch automatically upon failureLamp lift mechanismThis results inFast lamp replacementsPossibility to automatically re-calibrate the PU color sensor by comparing this color spectrum with the Sensors measurements.Lamp can be set from 120 to 132 Watt10 % more light, butBUT 6,000 hours instead of 10,000 hours expected lifetime !!!License required. (See BCM-BLM section)Option for alternative 180W lamps.A lot more light but,Expected lifetime 6000 hrs.
12 Components : Intelligent Lamps 120W/132W lamppowerLamp ID chipThe lamp swap is plug and play:Position via the sliders in the illumination unit ensures good contact for the power connectionThe lock hold the lamp in place.The OV2 lamps have a chip inside that stores :Serial numberLamp runtimeColor spectrumOptimal lift position (lamp optimization)Lamp is cooled by it’s own fanthe cooling goes through the housing of the lamp for better performanceAir inlet for burner coolingMounting handle and locking mechanism
13 Lamp cut-off voltage – lamp retry When lamps get older they canSimply stop working and refuse to start againExplode…… : no danger !The lamps are Ultra High Pressure (UHP) lamps.They contain two electrodes that start up and maintain an arc. This arc is the source of the light.As the lamp ages:The electrodes ware out.The resistance between the electrodes rises (With stable current: the voltage over the lamp rises)The light becomes dimmer as the glass is more and more blackenedWhen the voltage over the lamp in normal operation exceeds a certain value (cut-off voltage), the lamp driver will indicate lamp failure. However, the voltage rise could have multiple causes (voltage fluctuation).In that case, it is possible to reset the lamp and retry it.Often the lamp can be reignited and used again.However, if it no longer ignites, you should not try to ignite it again, but replace the lamp in stead.120W-132W cut-off voltage: 138VGraph not representative, for illustration purposes only !
14 Maintenance actions Defective lamp : Air Filter Replacement Retry lamp first (reset error + reselect lamp)When fails again (same day)Replace lampLamp warm-up – wait 2 min.Optimize the new lamp! (only possible in service mode).Air Filter ReplacementDependent on Contract and/or NeedDon’t shake the dirty filterDispose used filters – DO NOT CLEAN
15 Components : Typical delays & button functions Cooling / warming : 2 minColor stabilizing : 5 minOvertemp before shutdown : 5 minOn/Res button:Up1-3 sec: switch on from standby4-8 sec: toggle between IP address and error status> 10 sec: reset lamp errorDown1-3 sec: switch to standby4-8 sec: not used (yet)>10 sec: self diagnostic of IU
16 What’s inside the projector units ? TechnologyWhat’s inside the projector units ?
17 Technology : DLP chip DLP-chip technology One chip containing more than 1m mirrorsEach mirror representing one pixelPixel value is created through reflection time modulationSee movie...Movie:dlp_demo.exe
19 Technology : PU - Color sensor Allows the BCM software (see further) toHave equal brightness on every projectorHave equal color on every projector.
20 Barco Wall Control manager (BCM) Controlling all your walls from an easy to use software
21 Network Interfacing: Wall Control Network All projectors are connected to a network.Or directly to the customer bussiness networkOr isolated through the BCM server.Clients only connect the BCM server
22 BCM for administrators – simple view FeaturesOverview of cubesShows healthMultiple wallsCan generate reportsLogins/Passwords : (lowercase)operator/barcoadmin/barco
25 BCM: Brightness Lock 3 basic modes: Uncalibrated Brightness locked Brightness locking not active so dimmer wheel stays in last known position.Color correction not active so native colors are shown.Brightness lockedThe brightness is dynamically controlled with the dimmer wheel by using only the brightness information of the color sensor. The colors are static.Sense 6 (License required, see BLM)Next to Brightness, color is also dynamically controlled. This is done with the DMD chip.MENU, WALL, COLOR & BRIGHTNESS MODEUncalibrated:shipment standard (no calibration data available)Brightness locked: (Menu, Wall, Properties, Brightness Lock:)Disabled: Projector does not update any color or dimmer setting.Maximized: All projectors are continuously aligned for a light output equal to the highest output of the dimmest lampFixed: All projectors are continuously aligned for a light output equal to a set valueSense 6 (Menu, Wall, Properties, White Point & Gamut)Apply Average White: The average off all available lamps is calculated as white target. The gamut may be slightly less because of the adjustment. (preferred setting)Apply Max Gamut: To have maximum amount of available colors for all lamps, white target may differ from average.Set custom white point
26 BCM for administrators Problems or alarmsSeverity :GreenYellowOrangeRedRecommended solution
27 BCM: License Following options will require licenses: Hot standbySense6High power (120 -> 132 W)ScalingChecking for the required licenses:Via BCM, Help menuScaling: In case of a missing license file, the image is always shown original (native) resolution
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