BenQ W20000, W5000 user manual Selecting the aspect ratio, About the aspect ratio

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W20000-en.book Page 30 Monday, October 22, 2007 3:35 PM

English

Selecting the aspect ratio

The "aspect ratio" is the ratio of the image width to the image height. Digital TV is usually in 16:9 ratio, which is the default for this projector, and most analog TV signals and DVDs are in 4:3 ratio.

With the advent of digital signal processing, digital display devices like this projector can dynamically stretch and scale the image output to a different aspect than that of the image input source. Images can be stretched in a linear manner so the whole of the image is stretched equally, or non-linearly, which distorts the image.

To change the projected picture ratio (no matter what aspect the source is):

Using the remote control

Press one of the aspect ratio buttons to suit the format of the video signal and your display requirements.

Using the OSD menu

1.Press MENU and then press / until the Display menu is highlighted.

2.Press to highlight Aspect Ratio.

3.Press / to select an aspect ratio to suit the format of the video signal and your display requirements.

About the aspect ratio

1.Anamorphic (ANA): Scales an image so that it is displayed in the center of the screen with a 16:9 aspect ratio. This setting stretches and resizes linearly, except that it treats the vertical and horizontal dimensions independently. It stretches the height of the source image until it reaches the full projected height, and stretches the width of the source image until it reaches the full projected width. This may alter the projected aspect, depending upon the original aspect of the source image. Anamorphic is most suitable for images which are already in a 16:9 aspect, like high definition TV, as it displays them without aspect alteration.

2.4:3: Scales a picture so that it is displayed in the center of the screen with a 4:3 aspect ratio. This is most suitable for 4:3 pictures like computer monitors, standard definition TV and 4:3 aspect DVD movies, as it displays them without aspect alteration.

3.Letter Box (LB): Scales a picture to fit the projector’s native resolution in its horizontal width and resize the picture’s height to the 3/4 of the projection width. This may produce a picture greater in height than can be displayed, so part of the picture is lost (not displayed) along the top and bottom edges of the projection. This is suitable for the display of movies which are presented in letter box format (with black bars on the top and bottom).

Display

Aspect Ratio

Anamorphic

Keystone

 

Position

 

Overscan Adjustment

0

PIP

PC & Component YPbPr Tuning

S-Video

 

 

EXIT Back

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16:9 picture

4:3 picture

16:9 picture

Letter Box format picture

4.Wide: Stretches the picture horizontally in a non-linear manner, that is,

the edges of the picture are stretched more than the center of the picture

 

 

to prevent distortion of the central part of the picture. This is suitable for

 

 

4:3 picture

occasions where you want to stretch the width of a 4:3 aspect picture to

the width of a 16:9 aspect screen. It does not alter the height. Some

 

 

widescreen movies have been produced with their width squashed down

 

 

to the width of a 4:3 aspect, and are best viewed when restretched back to

 

 

their original width using this setting.

 

 

30 Using the projector

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Contents Welcome W20000/W5000 Digital Projector Home Cinema SeriesTable of contents Important safety instructions Do not block the ventilation holes while During operation. It may harm your sightDo not step on the projector or place any objects upon it Disposal Moisture condensationAvoid volatile liquid Ceiling mounting the projectorRemote control operation Shipping contentsRemote control batteries OverviewProjector features Front and upper side view Connector panelProjector exterior view Rear viewControls and functions Control panelRemote control Positioning your projector Choosing a locationObtaining a preferred projected image size Shifting the projection lens verticallyDetermine the aspect ratio of your screen, 169 or 43? Widescreen ratio screen dimension table Projection dimensionsInstallation for a 169 ratio screen With min Position Zoom Cm C Cm DInstallation for a 43 ratio screen Min Max Highest Lowest ImageDiagonal Best video quality Connecting with video equipmentPreparations Better video qualityConnecting Hdmi devices Connecting Rgbhv devicesConnecting component-video devices Connecting S-Video or video devices Connecting a computerConnect the projector to a computer with a VGA-BNC cable Using the OSD menu Using the projectorUsing the remote control or projector Turning the projector onUse / to highlight the System Setup menu Using the menusFine-tuning the image size and clarity Adjust the projected picture to the size that youSetting a password Using a security cable lockUtilizing the password function If you forget the passwordDisabling the password function Entering the password recall procedureChanging the password Confirm the new password by re-entering the new passwordCorrecting picture distortion Adjusting the projected imageAdjusting the projection angle Two parallel sidesFine-tuning the selected picture mode Using the preset and user modesSelecting a preset mode Using the remote controlRenaming user modes Setting the User 1/User 2/User 3 modeResetting the picture mode Enter and ExitFine-tuning the picture quality Advanced picture quality controls Setting Black LevelSelecting a color temperature Controlling image clarityTo adjust and store the settings Setting a preferred color temperatureTo set a preferred color temperature Color ManagementAdjusting contrast ratio via Iris Adjusting Brilliant ColorSelecting a Gamma setting Using the remote controlTheir original width using this setting Selecting the aspect ratioAbout the aspect ratio Operating in a high altitude environment Using Panamorph lenses optionalTo activate High Altitude Mode Suitable for use with PC and Rgbhd source inputsPIP source conflict list Disabled functions for the active windowsDisplaying more than one image source simultaneously Highlight PIP and press / to select OnCreating your own startup screen Personalizing the projector menu displayLocking control keys Turning the power off Commands during the cooling processOn-Screen Display OSD menus On-Screen Display OSD structureSystem Setup SetupInformation Picture -- Basic menu Picture -- Advanced menuSystem Setup menu Display menuAdvanced Setup menu Source ResolutionInformation menu Lamp HoursAdditional information Care of the projectorTo clean the filter Resetting the filter timerGetting to know the lamp hour Setting Auto OffLamp information Extending lamp lifeTiming of replacing the lamp Replacing the lampTighten the screws securing the lamp box Pulling it too quickly may cause the lamp toResetting the lamp timer After the startup logo, press Menu and then press / untilIndicators Troubleshooting Optical SpecificationsDimensions ElectricalTiming chart Format Resolution Refresh rateHz Freq.KHz Pixel Freq.MHzSupported timing for Hdmi input Supported timing for Video and S-Video inputsCopyright Warranty and Copyright informationWarranty DisclaimerEEC statement for European users Regulation statementsFCC statement for United States users MIC statement