ViewSonic Projector LS820 User Manual

							24
Changing HDMI input settings
In the unlikely event that you connect the projector to a device (such \
as DVD or Blu-
ray player) via the projector’s HDMI input jack, and the projected picture displays the 
wrong colors, please change the color space settings to one that complie\
s with the 
color space settings of the output device.
To perform this operation:
1.  Open the OSD menu and enter  Display > HDMI settings Menu.
2.  Press [Enter].
3.  Select HDMI format, then press / to select a suitable color space according to 
the color space settings of the output device.
•	RGB: Changes the color space to RGB.
•	 YUV: Changes the color space to YUV.
•	 Auto: Sets the projector to automatically detect the color space settings of\
 the 
color space.
4.  Select HDMI Range, then press / to select a suitable color range according to the 
color range settings of the output device.
•	Enhanced:  Changes HDMI color range to 0-255
•	 Normal:  Changes HDMI color range to 16-235.
•	 Auto:  Sets the projector to automatically detect the HDMI range of the inpu\
t signal.
This function is only available when the HDMI input jack is being used.
Please refer to equipment documentation to gain more details on color sp\
ace and HDMI range 
settings.  
						

							25
Adjusting the projected image
Adjusting the projection angle
The projector is furnished with an adjustment 
support peg. The adjustment support peg may 
be used to adjust projection height and projection 
angle along the vertical axis. The user may 
turn the adjustment support peg to make fine 
adjustments to projection angle and position of 
the projected image until it reaches the desired 
location.
If the projector is placed on an uneven surface or where the screen and \
projector 
are not perpendicular to each other, the projected image may be subject to keystone 
(trapezoidal) distortion. For more details on projection calibration, \
please refer to 
“Correcting keystone”.
Auto-adjustments to the image
You may need to optimize picture quality in some cases. To do this, press and hold 
the [Auto Sync] button of the remote control. Within 5 seconds, the buil\
t-in Intelligent 
Auto Adjust function will re-adjust the values of Frequency and Clock to prov\
ide the 
best picture quality.
The current source information will be displayed in the upper left corne\
r of the screen 
for 3 seconds.
When	using	Auto	Adjust	function,	the	entire	screen	will	turn	black.
This	function	is	only	available	when	PC	D-Sub	input	signal	(analog	RGB)	is	selected.
Auto-adjustments to image clarity
The focusing ring can be turned to adjust image clarity.  
						

							26
Correcting keystone
Keystone distortion is a problem where the projected image becomes trape\
zoidal in shape 
(keystone distortion) as a result of poor projection angle.
To correct this situation, you should adjust projector height and use the\
 following steps to 
correct the issue manually.
• Using the remote control
1.  Press 
/// to display the Keystone Correction page.
2.  Press 
 to initiate Keystone Correction at the 
top of the image. Press 
 to initiate Keystone 
Correction at the bottom of the image. Press 
 to initiate Keystone Correction at the right 
side of the image. Press 
 to initiate Keystone 
Correction at the left side of the image.
Press Press
• Using the OSD menu
1.  Open the OSD menu and open  Display > 
Keystone Correction menu.
Press Press
2. Press the  button to initiate Keystone Correction at the top of the image or press\
 
the 
 button to initiate Keystone Correction at the bottom of the image.
3.  Open the OSD menu and open  Display > Keystone Correction menu.
4.  Press [Enter]. This will bring up the  Keystone Correction page.
5.  Select Vertical and then press 
 to initiate Keystone Correction at the top of the 
image or press 
 to initiate Keystone Correction at the bottom of the image.
6.  You can also select  Horizontal and then press 
 to initiate Keystone Correction at 
the right side of the image. Press 
 to initiate Keystone Correction at the left side of 
the image.  
						

							27
Adjusting the 4 corners
You may manually adjust the irregular shapes and 
sizes of the rectangular image manually.
1. To display the  Corner Adjustment page, please 
follow any one of these steps:
i.  Press [Enter].
ii.  Open the OSD Menu and enter  Display > 
Corner Adjustment menu and press [Enter]. 
This will bring up the  Corner Adjustment 
page.
2.  Press /// to select the corner you wish to   
adjust, and then press [Enter].
3.  Press / to select a suitable adjustment 
method and then press [Enter].
4.  As shown in the screen, (/ to perform 45 
degree adjustments and  /// to perform 
90 degree adjustments). Please press  /// 
to adjust the shapes and size. You can press 
[Menu] or [Exit] to return to the previous step. 
Press and hold [Enter] for 2 seconds to reset the 
settings of the selected corner.
Adjusting Keystone Correction will reset Corner 
Adjustment settings.
To	display	this	page,	press	
and hold [Enter] for 2 
seconds to reset the 
settings for all 4 corners.
Shows the corner that 
you have selected.
	 After	making	Corner	 Adjustment	settings,	you	will	no	longer	be	able	to	adjust	certain	aspect	
ratios or time sequences.  
In	case	you	need	to	perform	these	changes,	please	reset	the	settings	for	all	4	corners.	  
The following message will be displayed:  
						

							28
Zoom	out	for	detailed	review
You may need to expand the image to inspect details in the projected imag\
e. Use the 
arrow keys to move the images.
• Using the remote control
1.  Press the 
 on the remote to bring up the Zoom Bar.
2.  Press  repeatedly to expand the image to the desired dimension.
3.  To browse the image, press [Enter] to switch to displacement mode and use\
 the 
arrow keys (, , , ) to move the image for browsing.
4.  To shrink the image, press [Enter] again to return to the Zoom In/Out fun\
ction and 
press  repeatedly to restore the image to its original size. You can also press the 
[Auto Sync] button on the remote control to restore the image to its ori\
ginal size.
•  Using the OSD menu
1.  Open the OSD menu to enter Display > Zoom menu.
2.  Press [Enter]. This will bring up the Zoom Slider.
3.  Repeat Steps 2-4 listed above in the Remote Control Use chapter.
The image can only be inspected after zooming out. You can zoom out further to inspect details.
Selecting the aspect ratio
The 'aspect ratio' is the ratio of the image width to the image height. \
Most analog TV 
and computers have a 4:3 aspect ratio, while digital TV and DVDs have 16:9 aspect 
ratios.
With the advent of digital signal processing, digital display devices li\
ke this projector 
can dynamically stretch and scale the image output to a different aspect than that of 
the image input signal.
To change the projected image ratio (no matter what aspect the source is\
):
1.  Open the OSD Menu and enter  Display > Aspect ratio menu.
2.  Press / to select an aspect ratio that suits the format of the video signal and\
 your 
display requirements.  
						

							29
About the aspect ratio
	
In	the	picture	below,	the	black	portions	are	inactive	areas	and	the	white	portions	are	active	
areas. OSD menus can be displayed on those unused black areas.
1.   Auto: Proportional scaling of an image to fit the 
projector’s natural resolution in its horizontal 
width. This is suitable where the incoming image 
is neither in 4:3 nor 16:9 aspect ratios but where 
you want to make most use of the screen without 
altering the image’s aspect ratio.
Image 16:10
Image 16:9
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 such as those for 
computer monitors, standard definition TV, and 
4:3 aspect DVD movies as these can be displayed 
without aspect alteration.
Image 4:3
3. 16:9: Scales a picture so that it is displayed 
in the center of the screen with a 16:9 aspect 
ratio. This is most suitable for images which are 
already in a 16:9 aspect such as high definition 
TV because as these can be displayed without 
aspect alteration.
Image 16:9
4. 2.35:1:  Scales a picture so that it is displayed at 
the center of the screen with a 2.35:1 aspect ratio 
without change.
Image 2.35:1  
						

							30
Optimizing the image
Selecting a picture mode
The projector is preset with several predefined picture modes. You may choose one of 
these modes that best fits your operating environment and input signal picture type.To select an operation mode that suits your need, please follow the steps\
 described 
below.
•  Press [Color Mode] repeatedly until you arrive at the mode you desire.
•  Enter Display > Color mode menu and press  / to select the required mode.
Picture modes for different types of signals
The following lists the Picture modes that can be used for different signal types.
1.  Brightest: Maximizes the brightness of the projected image. This mode is suitable 
when using projectors in environments such as well-lit rooms where extra\
-high 
brightness is required.
2.  Dynamic mode: Used during daytime demonstration to match PC and notebook 
computer color tones. The projector will also refer to the projected contents and use 
dynamic PC functions to optimize image quality.
3.  Standard mode:  Used during daytime demonstration to match PC and notebook 
computer color tones.
4.  ViewMatch	sRGB	mode: Switches between high brightness levels or precise color 
functions.
5.  Movie Mode:  Applicable for playing colored movies, video clips from digital cameras,\
 
or DVs from a PC input in darker (dim) environments to achieve the bes\
t viewing 
effects.
The available light source modes will be based upon the selected color m\
ode.
Using Screen Color
When the projection surface is colored (such as walls that are painted \
in colors other than 
white), the Screen Color function can be used to calibrate the color of the projected image 
in order to prevent color offsets between the source and color of the projected image.
To use this function, go to Display > Screen Color menu, and press / to select 
the color that is closest to that of the projection surface. Several pre\
set color options 
are available, namely:  white board, green board and blackboard. These setup 
functions may differ according to model type.
This function is only available when PC or HDMI input signals were selec\
ted.  
						

							31
Fine-tuning of image quality in user modes
You may use several user-defined functions if the projector detects certain signal 
types. You can make adjustments to these functions based on your needs.
Adjusting	Brightness
Enter Display > Brightness	menu and then press 
 / .
The higher the value, the brighter the image. And 
lower the setting, darker the image.
Adjusting this control allows the black area of the image to appear just\
 as black to 
reveal details within.
Adjusting Contrast
Enter Display > Contrast menu and then press 
/.
The higher the value, the greater the contrast. After 
adjusting  brightness, this function may be used 
to set the peak-white level that matches the input 
signal and observed environment of your choice.
Adjusting Color
Enter Display > Advanced > Color menu and press  /.
Lower settings produce less color saturation. If the setting is too high\
, colors on the 
image will be overpowering, which makes the image unrealistic.
	 This	function	is	only	available	when	the	input	signals	are	S-Video,	Video,	 YPbPr	(digital)	or	
YCbCr	(digital).
Adjusting Tint
Enter Display > Advanced > Tint menu and then press  /.
The higher the value, the more reddish the picture becomes. The lower the value, the 
more greenish the picture becomes.
This	function	is	only	available	when	the	input	signals	are	S-Video,	Video,	 YPbPr	(digital)	or	
YCbCr	(digital).
Adjusting Sharpness
Enter Display > Advanced > Sharpness menu and then press  /.
Higher settings produce sharper images. The lower the value, the softer the picture 
becomes.
This	function	is	only	available	when	the	input	signals	are	S-Video,	Video,	 YPbPr	(digital)	or	
YCbCr	(digital).  
						

							32
Adjusting	Brilliant	Color
Enter Display > Advanced >	Brilliant	Color	menu, and then press  /.
This feature utilizes a new color-processing algorithm and system level \
enhancements to 
enable higher brightness while providing truer, more vibrant colors of the projected image. 
Brightness levels of mid-tone areas commonly seen in videos and natural \
landscapes 
are increased by more than 50%, allowing the projector to generate image\
s in realistic 
and true colors. To acquire this quality of images, please select the level you desire. If\
 not 
required, set this option to  OFF.
Reducing image noise
Enter Display > Advanced > Noise Reduction menu, and then press  /.
This function is capable of reducing image noise generated electrically \
by different media 
players. Higher settings will provide lower image noise.
This	function	is	only	available	when	PC,	Video,	or	S-Video	input	signals	were	selected.
Selecting a gamma setting
Enter Display > Advanced > Gamma menu, and then press / to choose the desired 
settings.
Gamma refers to the relationship between input source and image brightne\
ss.
Selecting a Color Temperature
Enter Display > Color Temperature  menu, and then press /.
Options available to Color Temperature settings will depend on the choice of the signal type.
1.  Cool: Provides the highest color temperature.  Cool colors allow the image to display 
white colors with the more blue undertones compared to other temperature\
s.
2.  Neutral: White colors in the image will be provided with a light blue undertone\
.
3.  Normal: Maintains a normal white color tone.
4.  Warm: White colors in the image will be provided with a light red undertone.\
Setting a preferred color temperature
1. Enter Display > Color Temperature  menu.
2.  Press / to select Cool, Neutral, Normal or Warm, and press [Enter].
3.  Press / to select the item you wish to change, then press  / to adjust its value.
•	 Red	Gain/Green	Gain/Blue	Gain : Adjusts the contrasts of the red, green, and 
blue colors.
•	 Red	Offset/Green	Offset/Blue	Offset: Adjusts the brightness of red, green, and 
blue colors.  
						

							33
Color Management
Only in permanent installations with controlled lighting levels such as \
boardrooms, lecture 
theaters, or home theaters, should color management be considered. Color\
 management 
provides fine color control adjusent to allow for more accurate color reproduction, should 
you require it.
If you have purchased a test disc that contains various color test patte\
rns that can be used 
to test the color presentation of monitors, TVs, and projectors, any image from the disc can 
be projected on screen and adjusted using the Color Management menu.
To adjust the settings:
1. Open the OSD menu, go to Display > Advanced > 
Color Management menu.
2.  Press [Enter] to bring up the Color Management 
page.
3.  Select Original Color , then press / and select 
any one of the colors from red, yellow, green, cyan, 
blue, or magenta.
Red
BlueGreen
Cyan
Magenta Yellow
4. 
Press  to select the Tint, then press / to select the range. Enlarging the range 
will include colors composed of higher proportions of 2 similar colors. \
  
Please refer to the illustration to the right for how the colors relate \
to each other.  
For example, if you select red and set the range to 0, you will only sel\
ect pure red 
areas of the projected image. Increasing the range will include shades o\
f red closer 
to yellow and magenta.
5.  Press  and select Saturation, then press / to adjust its values according to 
your preferences. The effect of each adjustment will be immediately reflected upon 
the image.  
For example, if you select Red and set its value at 0, only the saturati\
on of pure red 
will be affected.
  Saturation is the amount of that color in a video picture. Lower setting\
s produce less saturated 
colors.	 A	setting	of	0	will	remove	that	color	from	the	image	entirely.	If	the	saturation	is	too	high,	
that color will be overpowering and unrealistic.
6.  Press  and select Gain, then press / to adjust its values according to your 
preferences. This affects the contrast level of the primary color selected. The effect of 
each adjustment will be immediately reflected upon the image.
7.  Repeat steps 3 to 6 to carry out other color adjustments.
8.  Make sure you have made all of the desired adjustments.
9.  Press [Exit] to save the settings and exit.