BenQ W770ST user manual Selecting the aspect ratio, About the aspect ratio

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Selecting the aspect ratio

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

1.Press Aspect to show the current setting.

2.Press Aspect repeatedly to select an aspect ratio to suit the format of the video signal and your display requirements.

•Using the OSD menu

1.Press MENU/EXIT and then press About the aspect ratio / Manual background until the Display menu is highlighted.

2.Press Manual background to highlight Aspect Ratio.

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

About the aspect ratio

1.Auto: Scales an image proportionally to fit the projector's native resolution in its horizontal or vertical width. This is suitable for the incoming image which is neither in 4:3 nor 16:9 and you want to make most use of the screen without altering the image's aspect ratio.

2.Real: This setting displays the image in a one-to-one pixel mapping without alteration or resize in the center of the projection. This is most suitable for use with PC source inputs.

3.4:3: 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.

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 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.

5.Anamorphic: 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

15:9 picture

4:3 picture

4:3 picture

4:3 picture

16:9 picture

Using the projector

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Contents User Manual W750/W770ST Digital Projector Home Cinema SeriesPositioning your projector Table of contentsConnecting with video Warranty and CopyrightImportant safety instructions Do not cover the projector with any item Lead, which is contained in solder Mercury, which is used in the lamp Moisture condensationAvoid volatile liquids DisposalRemote control Shipping contentsOverview Some of the accessories may vary from region to regionCeiling mounting the projector Replacing the remote control batteriesRemote control effective range 8 Overview Vivid color reproduction Projector featuresHigh picture quality High brightnessRear and lower side view Projector exterior viewSee Connecting with video equipment on page 19 for connection details Front and upper side viewControl panel Controls and functionsRemote control Choosing a location Positioning your projectorObtaining a preferred projected image size How to determine the recommended screen size for a given distanceWidth Projection dimensionsDiagonal Heightinch Vertical offsetlens Installation for a 43 ratio screenLowest ImageHeight Preparations Connecting with video equipmentConnecting HDMI devices 20 Positioning your projector Connecting component-video devicesConnecting S-Video or video devices Connect the projector to a computer with a VGA cable Connecting a computerTurning the projector on Using the projectorENTER Fine-tuning the image size and claritySelecting an input source Securing the projector Using the menusUsing a security cable lock Input Password page displays Utilizing the password functionSetting a password If you forget the password26 Using the projector Entering the password recall procedureChanging the password Disabling the password functionCorrecting picture distortion Adjusting the projected imageAdjusting the projection angle Setting the User 1/User 2/User 3 mode Using the preset and user modesSelecting a preset mode Fine-tuning the selected picture modeAdjusting Contrast Fine-tuning the picture qualityResetting the picture mode Adjusting BrightnessSelecting a color temperature Adjusting ColorAdjusting Tint Adjusting SharpnessControlling image clarity Advanced picture quality controlsSetting Black Level Setting a preferred color temperatureColor Management Selecting a Gamma settingAdjusting Brilliant Color among Red , Green , Blue , Cyan , Magenta and Yellow Setting Film ModeSetting 3D Comb Filter Muting the sound Adjusting the soundAdjusting the sound level Turning off the Power On/Off Ring ToneAbout the aspect ratio Selecting the aspect ratioOSD menus can be displayed on those unused black areas Magnifying and searching for detailsUsing the 3D menus Watching 3D contentOperating in a high altitude environment Connecting 3D video devicesStop watching 3D content if you feel fatigue or discomfort Take appropriate breaks when watching 3D contentTurning the projector off Personalizing the projector menu displayLocking control keys Cinema/Dynamic/Standard/User 1/User 2/User 3/3D On-Screen Display OSD menusPreset Mode On-Screen Display OSD structureInformation System SetupBasic AdvancedPicture menu Display menu Audio Setup menuSystem Setup Basic menu Closed Caption Enable System Setup Advanced menuReset Lamp Timer Resetting the lamp timer on page 51 for detailsThis menu shows you the current operating status of the projector Information menuCare of the projector Additional informationExtending lamp life Lamp informationGetting to know the lamp hour until the next hour lamp warning appears Timing of replacing the lampReplacing the lamp Install a new lamp for optimal performance. If the projector isLift the handle so that it stands up Disconnect the lamp connector from the projector3. Remove the lamp cover from the projector Loosen the screw that secures the lampResetting the lamp timer Power IndicatorsPowering up The projector needs to cool for 90 seconds after the powerThe projector may be in a poorly ventilated location The internal temperature is too highThe intake ventilation or the exhaust ventilation is blockednecessary. See page Troubleshootingswitched on. See page ring. See pageMechanical SpecificationsOptical Electrical76.5 Unit mmCeiling mount screws M6 x 8 Max. L = 8 mm 127.7253.47 74.5102.84 133.97BenQ Notebook FrequencyXGA60 XGA120Supported timing for 3D signal with Top-Bottom and Side-by-Side format BenQ Notebook Pixel Freq. MHz Supported timing for 3D signal with Side-by-Side formatRefresh rate Hz H. Freq. KHzNTSC 62 Using the projectorSupported timing for EDTV and HDTV via Component inputs Supported timing for Video and S-Video inputsDisclaimer Warranty and Copyright informationWarranty Copyright
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