Philips 170S9FB User Manual

e-Manual

Philips LCD Monitor Electronic User’s Manual

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Safety and Troubleshooting Information

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Safety Precautions and Maintenance

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FAQs

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Troubleshooting

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Regulatory Information

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Other Related Information

Safety and Troubleshooting Information

Safety precautions and maintenance

WARNING: Use of controls, adjustments or procedures other than those specified in this documentation may result in exposure to shock, electrical hazards and/or mechanical hazards.

Read and follow these instructions when connecting and using your computer monitor:

Operation:

● Keep the monitor out of direct sunlight and away from stoves or any other heat source.

● Remove any object that could fall into ventilation holes or prevent proper cooling of the

monitors electronics.

● Do not block the ventilation holes on the cabinet.

● When positioning the monitor, make sure the power plug and outlet are easily accessible.

● If turning off the monitor by detaching the power cable or DC power cord, wait for 6

seconds before attaching the power cable or DC power cord for normal operation.

● Please use approved power cord provided by Philips all the time. If your power cord is

missing, please contact with your local service center. (Please refer to Customer Care Consumer Information Center)

● Do not subject the LCD monitor to severe vibration or high impact conditions during

operation.

● Do not knock or drop the monitor during operation or transportation.

Maintenance:

● To protect your display from possible damage, do not put excessive pressure on the LCD

panel. When moving your monitor, grasp the frame to lift; do not lift the monitor by placing your hand or fingers on the LCD panel.

● Unplug the monitor if you are not going to use it for an extensive period of time.

● Unplug the monitor if you need to clean it with a slightly damp cloth. The screen may be

wiped with a dry cloth when the power is off. However, never use organic solvent, such as, alcohol, or ammonia-based liquids to clean your monitor.

● To avoid the risk of shock or permanent damage to the set, do not expose the monitor to

dust, rain, water, or excessive moisture environment.

● If your monitor gets wet, wipe it with dry cloth as soon as possible.

● If foreign substance or water gets in your monitor, please turn the power off immediately

and disconnect the power cord. Then, remove the foreign substance or water, and send it to the maintenance center.

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Safety and Troubleshooting Information

● Do not store or use the LCD monitor in locations exposed to heat, direct sunlight or

extreme cold.

● In order to maintain the best performance of your monitor and use it for a longer lifetime,

please use the monitor in a location that falls within the following temperature and humidity ranges.

❍ Temperature: 0-40°C 32-95°F ❍ Humidity: 20-80% RH

● IMPORTANT: Always activate a moving screen saver program when you leave your

monitor unattended. Always activate a periodic screen refresh application if your LCD monitor will display unchanging static content. Uninterrupted display of still or static images over an extended period may cause “burn in”, also known as “after-imaging” or “ghost imaging”, on your screen. "Burn-in", "after-imaging", or "ghost imaging" is a wellknown phenomenon in LCD panel technology. In most cases, the “burned in” or “afterimaging” or “ghost imaging” will disappear gradually over a period of time after the power has been switched off.

WARNING: Severe” burn-in” or “after-image” or “ghost image” symptoms will not disappear and cannot be repaired. The damage mentioned above is not covered under your warranty.

Service:

● The casing cover should be opened only by qualified service personnel.

● If there is any need for any document for repair or integration, please contact with your

local service center. (please refer to the chapter of "Consumer Information Center")

● For transportation information, please refer to "Physical Specifications".

● Do not leave your monitor in a car/trunk under direct sun light.

Consult a service technician if the monitor does not operate normally, or you are not sure what procedure to take when the operating instructions given in this manual have been followed.

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About This Manual

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About This Guide

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Notational Descriptions

About This Manual

About This Guide

This electronic user's guide is intended for anyone who uses the Philips LCD Monitor. It describes the LCD monitor's features, setup, operation and other important information. Its contents are identical to the information in our printed version.

It includes the following sections:

● Safety and Troubleshooting Information provides tips and solutions for common problems

as well as other related information you may need.

● About This Electronic User's Manual gives an overview of information included, along with

notation icon descriptions and other documentation for your reference.

● Product Information gives an overview of the monitor's features as well as the technical

specifications for this monitor.

● Installing Your Monitor describes the initial setup process and gives an overview of how to

use the monitor.

● On-Screen Display provides information on adjusting the settings on your monitor.

● Customer Care and Warranty contains a list of worldwide Philips Consumer Information

Centers along with help desk phone numbers and information on the warranty applicable to your product.

● Glossary defines technical terms.

● Download and Print Option transfers this entire manual to your hard drive for easy

reference.

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Notational Descriptions

The following subsections describe notational conventions used in this document.

Notes, Cautions and Warnings

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About This Manual

Throughout this guide, blocks of text may be accompanied by an icon and printed in bold or italic type. These blocks contain notes, cautions or warnings. They are used as follows:

NOTE: This icon indicates important information and tips that help you make better use of your computer system.

CAUTION: This icon indicates information that tells you how to avoid either potential damage to hardware or loss of data.

WARNING: This icon indicates the potential for bodily harm and tells you how to avoid the problem.

Some warnings may appear in alternate formats and may not be accompanied by an icon. In such cases, the specific presentation of the warning is mandated by the relevant regulatory authority.

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All rights reserved. Reproduction, copying, use, modification, hiring, renting, public performance, transmission and/or broadcasting in whole or in part is prohibited without written consent of Philips Electronics NV

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Product Information

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Your LCD Monitor

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Smartimage

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SmartContrast

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SmartSaturate

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SmartSharpness

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Lead-free Product

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Technical Specifications

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Resolution & Preset Modes

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Philips Pixel Defect Policy

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Automatic Power Saving

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Physical Specification

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Pin Assignment

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Product Views

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Physical Function

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SmartManage & SmartControl II

Product Information

Your LCD monitor

Congratulations on your purchase and welcome to Philips. To fully benefit from the support that Philips offers, register your product at. www.philips.com/welcome

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SmartImage

What is it?

SmartImage provides presets that optimize display for different types of content, dynamically adjusting brightness, contrast, color and sharpness in real time. Whether you're working with text applications, displaying images or watching

a video, Philips SmartImage delivers great optimized LCD display performance.

Why do I need it?

You want a LCD display that delivers optimized display all your favorite types of content, SmartImage software dynamically adjust brightness, contrast, color and sharpness in real time to enhance your LCD viewing experience.

How does it work?

SmartImage - software based on Philips award-winning LightFrame™ technology - analyzes the content displayed on your screen. Based on a scenario you select, SmartImage dynamically enhances the contrast, color saturation

and sharpness of images and video for ultimate display performance - all in real time with the press on a single button.

How to enable SmartImage?

拰濕蝴

Product Information

1. Press to

launch the SmartImage on screen display;

Keep press

to toggle between Office Work, Image Viewing, Entertainment, Economy, and Off;

3. The SmartImage on screen display will remain on screen for 5 seconds or you can also press”OK” to make confirmation.

4. When SmartImage is enabled, the sRGB scheme is disabled automatically. To use sRGB you need to disable SmartImage with the

button at the front bezel of your monitor.

Except using key to scroll down, you can also press buttons to choose and press “OK” to confirm selection and close the SmartImage OSD.There are five modes to be selected: Office Work, Image Viewing, Entertainment, Economy, and Off.

There are five modes to be selected: Office Work, Image Viewing, Entertainment, Economy, and Off.

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Product Information

1. Office Work: Enhances text and dampens brightness to increase readability and reduce eye strain. This mode

significantly enhances readability and productivity when you're working with spreadsheets, PDF files, scanned articles or other general office applications.

Image Viewing: This profile combines color saturation, dynamic contrast and sharpness enhancement to display photos

and other images with outstanding clarity in vibrant colors - all without artifacts and faded colors.

3. Entertainment: Ramped up luminance, deepened color saturation, dynamic contrast and razor sharpness displays every

details in darker areas of your videos without color washout in brighter areas maintaining a dynamic natural values for the ultimate video display.

Economy: Under this profile, brightness, contrast are adjusted and backlighting fine-tuned for just right display of

everyday office applications and lower power consumption.

5. Off: No optimization by SmartImage.

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SmartContrast

What is it?

or dimming backlighting for clear display of images on dark backgrounds.

Why do I need it?

You want the very best visual clarity and viewing comfort for every type of content. SmartContrast dynamically controls contrast and adjusts backlighting for clear, crisp, bright gaming and video images or displays clear, readable text for office work. By reducing your monitor's power consumption, you save on energy costs and extend the lifetime of

your monitor.

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Product Information

How does it work?

When you active SmartContrast which will analysis the content you are displaying in real time to adjust colors and control backlight intensity. This function can obviously enhance contrast in dynamic for more entertainment fun when viewing videos or playing games.

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SmartSaturate

What is it?

Smart technology that controls color saturation - the degree to which one on screen color is diluted by neighboring colors to deliver rich and vibrant images for more entertainment fun when you are viewing videos.

Why do I need it?

You want rich, vibrant images for more entertainment fun when viewing photos or videos

How does it work?

SmartSaturate dynamically controls color saturation - the degree to which on-screen color is diluted by neighboring colors to deliver rich, vibrant display for more entertainment fun when you are viewing images or videos in your display's Entertainment mode and is turned off for top quality display of office application and in the Economy mode to reduce power consumption

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SmartSharpness

What is it?

Smart technology that enhances sharpness when you need it for ultimate display performance and more entertainment fun when you are viewing videos or photos.

Why do I need it?

You want the ultimate in sharpness for more entertainment fun when viewing photos or videos.

How does it work?

Smart technology enhances sharpness when you need it for ultimate display performance and more entertainment fun when you are viewing videos or photos in the Entertainment mode and is turned off for top quality display of office applications and in the Economy mode to reduce power consumptions.

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Lead-free Product

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Product Information

Philips eliminated toxic substances like lead from its displays. Lead-free display helps protect your health and promotes environmentally sound recovery and disposal of waste from electrical and electronic equipment.Philips complies with the European Community stringent RoHS Directive mandating restrictions on hazardous substances in electrical and electronic equipment. With Philips, you can be confident that your display device does not harm the environment.

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Technical Specifications*

LCD PANEL

 Type

TFT LCD

 Screen size

17" visual

 Pixel Pitch

0.264 x 0.264 mm

 LCD Panel type

1280 x 1024 pixels R.G.B. vertical stripe

Anti-glare polarizer, hard coated

 Effective viewing area

337.9 x 270.3 mm

SCANNING

 Vertical refresh rate

56 Hz-75 Hz

 Horizontal Frequency

30 kHz - 83 kHz

VIDEO

 Video dot rate

140 MHz

 Input impedance

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Product Information

- Video 75 ohm

- Sync

2.2K ohm

 Input signal levels

0.7 Vpp

 Sync input signal

Separate sync Composite sync

Sync on green

 Sync polarities

Positive and negative

* This data is subject to change without notice.

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Resolution & Preset Modes

Maximum Resolution

- For 170S9 1280 x 1024 at 75 Hz

B. Recommended Resolution

- For 170S9 1280 x 1024 at 60 Hz

11 factory preset modes:

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Product Information

H. freq (kHz) Resolution V. freq (Hz)

31.469 720*400 70.087

31.469 640*480 59.940

35.000 640*480 66.667

37.500 640*480 75.000

37.879 800*600 60.317

46.875 800*600 75.000

49.725 832*624 74.550

48.363 1024*768 60.004

60.023 1024*768 75.029

63.981 1280*1024 60.020

79.976 1280*1024 75.025

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Automatic Power Saving

If you have VESA DPMS compliance display card or software installed in your PC, the monitor can automatically reduce its power consumption when not in use. If an input from a keyboard, mouse or other input device is detected, the monitor will 'wake up' automatically. The following table shows the power consumption and signaling of this automatic power saving feature:

Power Management Definition

VESA Mode Video H-sync V-sync Power Used

LED color

Active ON Yes Yes < 33W (typ.) Blue

Sleep OFF No No < 1 W

Blue

Blinking

Switch Off OFF - - < 0.8 W Off

This monitor is

ENERGY STAR

compliant. As an ENERGY STAR® Partner, PHILIPS has

determined that this product meets the

ENERGY STAR

guidelines for energy efficiency.

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Physical Specifications

拰濕蝴

Product Information

 Tilt

-5°+2/-0 ~+ 20°+3/-0

 Power supply

100 ~ 240 VAC, 50/60 Hz

 Power consumption

33W* (typ.)

 Temperature

0° C to 40 ° C (operating)

-20° C to 60° C (storage)

 Relative humidity

20% to 80%

 System MTBF

50K hours (CCFL 40K hours)

* This data is subject to change without notice.

1280 x 1024, standard size, contrast 50%, brightness max., 6500° K, full white pattern.

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Pin Assignment

1.The digital only connector contains 24 signal contacts organized in three rows of eight contacts. Signal pin assignments are listed in the following table:

No.

Signal Assignment

Pin No.

Signal Assignment

Pin No.

Signal Assignment

T.M.D.S. Data2-

9 T.M.D.S. Data1-

T.M.D.S. Data0-

2 T.M.D.S. Data2+ 10 T.M.D.S. Data1+

T.M.D.S. Data0+

3 T.M.D.S. Data2/4 Shield 11 T.M.D.S. Data1/3 Shield

T.M.D.S. Data0/5 Shield

4 No connect 12 No connect

No connect

5 No connect 13 No connect

No connect

6 DDC Clock 14 +5V Power

T.M.D.S. Clock Shield

7 DDC Data 15 Ground (for +5V)

T.M.D.S. Clock+

8 No connect

Hot Plug Detect

T.M.D.S. Clock-

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Product Information

2.The 15-pin D-sub connector (male) of the signal cable:

Pin No.

Assignment

Pin No.

Assignment

Red video input

DDC + 5 V

Green video input/SOG

Logic ground

Blue video input

Ground

Sense (GND)

Serial data line (SDA)

Cable detect (GND)

H. Sync / H+V. Sync

Red video ground

V. Sync

Green video ground

Data clock line (SCL)

Blue video ground

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Product Views

Follow the links to see various views of the monitor and its components.

Front View Product Description

拰濕蝴

Product Information

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Physical Function

Tilt

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佌拰濕蝴

Installing Your LCD Monitor

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Front View Produt Description

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Connecting to Your PC

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The Base

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Getting Started

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Optimizing Performance

Installing Your LCD Monitor

Front View Product Description

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1 To switch monitor's power On and Off

Input

To access the OSD menu

To adjust the OSD menu

To adjust brightness of the display

To change the signal input source Automatically adjust the horizontal position, vertical position, phase and

clock settings / Return to previous OSD level SmartImage.There are five modes to be selected: Office Work, Image

Viewing, Entertainment, Economy, and Off

Installing Your LCD Monitor

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Rear View

1 VGA input 2 DVI-D input * 3 AC power input 4 Kensington anti-thief lock

*available for selective models

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Installing Your LCD Monitor

Optimizing Performance

● For best performance, ensure that your display settings are set at 1280x1024, 60Hz.

Note: You can check the current display settings by pressing the 'OK' button

once. The current display mode is shown in OSD main controls called RESOLUTION.

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On-Screen Display

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Description of the On-Screen Display

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The OSD Tree

On-Screen Display

Description of the On Screen Display

What is the On-Screen Display?

On-Screen Display (OSD) is a feature in all Philips LCD monitors. It allows an end user to adjust screen performance or select functions of the monitors directly through an on-screen instruction window. A user friendly on screen display interface is shown as below :

Basic and simple instruction on the control keys.

In the OSD shown above users can press

buttons at the front bezel of the monitor to move

the cursor,

to confirm the choice or change.

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On-Screen Display

The OSD Tree

Below is an overall view of the structure of the On-Screen Display. You can use this as a reference when you want to work your way around the different adjustments later on.

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On-Screen Display

Resolution notification

This monitor is designed for optimal performance at its native resolution, 1280X1024@60Hz. When the monitor is powered on at a different resolution, an alert is displayed on screen: Use 1280x1024@60Hz for best results.

Display of the native resolution alert can be switched off from Setup in the OSD (On Screen Display) menu.

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Customer Care & Warranty

PLEASE SELECT YOUR COUNTRY/AREA TO REVIEW DETAILS OF YOUR WARRANTY COVERAGE

WESTERN EUROPE: Austria  Belgium  Denmark  France  Germany  Greece  Finland 

Ireland  Italy  Luxembourg  the Netherlands  Norway  Portugal  Sweden  Switzerland  Spain

 United Kingdom

EASTERN EUROPE: Czech Republic  Hungary  Poland  Russia  Slovakia  Slovenia  Turkey

LATIN AMERICA: Antilles  Argentina  Brasil  Chile  Colombia  Mexico  Paraguay  Peru 

Uruguay  Venezuela

NORTH AMERICA: Canada  USA

PACIFIC: Australia  New Zealand

ASIA: Bangladesh  China  Hong Kong  India  Indonesia  Japan  Korea  Malaysia  Pakistan 

Philippines  Singapore  Taiwan  Thailand

AFRICA: Morocco  South Africa

MIDDLE EAST: Dubai  Egypt

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Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Active matrix

This is a kind of liquid crystal display structure in which switching transistors are attached to each pixel to control the on/off voltage. It produces a brighter and sharper display with a broader viewing angle than a passive matrix display. Also refer to TFT (thin film transistor).

Amorphous silicon (a-Si)

A semiconductor material that is used to make the thin film transistors (TFTs) layer of an active matrix LCD.

Aspect ratio

The width-to-height ratio of the active area of a display. In general, most monitors have an aspect ratio of 4:3. Wide monitors or TVs have an aspect ratio of 16:9 or 16:10.

Backlight

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Glossary

The light source for a transmissive LCD. There are two techniques used in nowaday LCD designs. Most TFT LCD panels use CCFLs (cold cathode fluorescent light) and a diffuser panel directly behind the liquid crystal layer. New technology using Light Emitting Diodes (LED) are still under development.

Brightness

The dimension of color that is referred to an achromatic scale, ranging from black to white, also called lightness or luminous reflectance. Because of confusion with saturation, the use of this term should be discouraged.

CCFL(cold cathode fluorescent light)

These are the fluorescent light tubes providing the light for the LCD module. These tubes are generally very thin, approximately 2 mm in diameter.

Chromaticity

That part of color specification, which does not involve illuminance. Chromaticity is two-dimensional and specified by pairs of numbers such as dominant wavelength and purity.

CIE (Commission International de I'Eclairage)

The International Commission on Illumination, the primary international organization concerned with color and color measurement.

Color temperature

A measurement of the color of light radiated by an object while it is being heated. This measurement is express in terms of absolute scale, (degrees Kelvin). Lower Kelvin temperatures such as 2400° K are red; higher temperatures such as 9300° K are blue. Neutral temperature is white, at 6504° K. Philips monitors generally offers 9300° K, 6500° K, and user define.

Contrast

The luminance variation between light and dark areas in an image.

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Glossary

Contrast ratio

The ratio of luminance between the brightest white pattern and the darkest black pattern.

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D-SUB

A VGA Analog input connector. Your monitor comes with a D-Sub cable.

Digital Visual Interface (DVI)

The Digital Visual Interface (DVI) specification provides a high-speed digital connection for visual data types that is display technology independent. The interface is primarily focused at providing a connection between a computer and its display device. The DVI specification meets the needs of all segments of the PC industry (workstation, desktop, laptop, etc.) and will enable these different segments to unite around one monitor interface specification.

The DVI interface enables:

1. Reduce signal loss and video noise in signal due to less signal conversion.

2. Independent from display technology, and can be used on LCD, Plasma, LCOS, etc.

3. Plug and play through hot plug detection, EDID and DDC2B.

4. Digital and Analog support in a single connector (DVI-I only).

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Energy Star Computers Program

An energy conservation program launched by the US Environmental Protection Agency (EPA),

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Glossary

promotes the manufacture and marketing of energy-efficient office automation equipment. Companies joining this program, must be willing to commit themselves to manufacture one or more products capable of going into a low -power state (< 30 W) either after a period of inactivity, or after a predetermined time selected by the user.

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Gamma

Screen luminance as a function of video voltage approximately follows a mathematical power function of the input video signal, the exponent of which is called gamma.

Grayscale

An achromatic scale ranging from black through a series of successively lighter grays to white. Such a series may be made up of steps, which appear to be equally distant from one another. If the

Analog/ Digital converter is 8 bit, then the monitor can display at most 2

= 256 levels. For a color monitor, R.G.B. each color hads 256 levels. Thus, total color can display is 256x256x256= 16.7 million.

Hue

The main attribute of a color that distinguishes it from other colors. For example, a color may have a green, yellow, or purple hue. Color defined as having hue are know as chromatic colors. White, black, and grays possess no hue.

IPS (In Plane Switching)

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Glossary

A technique of improving the viewing angle of an LCD where the liquid crystal molecules are switched in the plane of the LCD layer rather than vertical to it.

LCD (liquid crystal display)

A display composed of liquid crystal suspended between two transparent sheets. The display is composed thousands of pixels which can be turned on or off with electrical stimulation. Thus,

colorful images/texts can be generated.

Liquid crystal

The compound found in liquid crystal displays. Liquid crystal reacts predictably when electrically stimulated. This makes it the ideal compound to turn LCD pixels "on" or "off." Liquid crystal is sometimes abbreviated as LC.

Luminance

A measure of the brightness or luminous intensity of light, usually expressed in units of Candelas per square meter (cd/m2) or foot Lamberts. 1 fL=3.426 cd/m2.

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Nit

A unit of luminance equal to 1 cd/m2 or 0.292 ftL.

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Glossary

Pixel

PICture Element; the smallest element on a computerized CRT or LCD image, and hence a display.

Polarizer

A light filter which only allows light waves of a certain rotation through. Polarized material with perpendicular filtering is used in LCDs to enclose the liquid crystal. The liquid crystal is then used as the medium which twists the light waves 90° in order to allow the light to pass through or not.

Refresh rate

The number of times per second the screen is refreshed or redrawn. This number is usually stated in Hz (Hertz) or cycles per second. A rate of 60 Hz is equal to 60 tomes per second.

SmartContrast

Unique technology that dynamically analyzes displayed content and automatically optimizes a LCD monitor's contrast ratio for maximum visual clarity and viewing enjoyment, stepping up backlighting for clearer, crisper and brighter images or dimming backlighting for clear display of images on dark backgrounds. For monitors with SmartContrast, contrast ratio achieves 3000:1, the highest available today in a desktop LCD monitor.

SmartControl II

SmartControl II is monitor-based software with an easy-to-use on-screen graphic interface that guides you through fine-tuning resolution, color calibration and other display settings including brightness, contrast, clock & phase, position, RGB, white point and - on models with onboard speakers - volume adjustments.

SmartImage

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Glossary

SmartResponse

SmartResponse is exclusive Philips technology that adjusts response time to application requirements, delivering faster response times for gaming and videos or better color saturation for viewing photos and static images

SmartManage Lite

SmartManage Lite is a system for monitoring, managing and checking status of display devices designed to meet the specific needs of growing small and medium-size businesses that minimizes costs and maximizes IT staff efficiency by remotely controlling key display settings, providing status reports, compiling usage data, overseeing energy consumption and deterring thefts

sRGB

sRGB is a standard for ensuring correct exchange of colors between different devices (e.g. digital cameras, monitors, printers, scanners, etc.)

Using a standard unified color space, sRGB will help represent pictures taken by an sRGB compatible device correctly on your sRGB enabled Philips monitors. In that way, the colors are calibrated and you can rely on the correctness of the colors shown on your screen.

Important with the use of sRGB is that the brightness and contrast of your monitor is fixed to a predefined setting as well as the color gamut. Therefore it is important to select the sRGB setting in the monitor's OSD.

To do so, open the OSD by pressing the OK button on the front of your monitor. Move the down button to go to Color and press OK again. Use the right button to go to sRGB. Then move the down button and press OK again to exit the OSD.

After this, please do not change the brightness or contrast setting of your monitor. If you change either of these, the monitor will exit the sRGB mode and go to a color temperature setting of 6500K.

Other: USB plug: An upstream and a downstream USB plug is provide for user's convenience.

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Glossary

TFT(thin film transistor)

Usually made from amorphous silicon (a-Si) and used as a switch to a charge storage device located below each sub-pixel on an active matrix LCD.

TrueVision

TrueVision is industry-leading, proprietary Philips testing and algorithm technology for monitor adjustment and fine tuning, an extensive process that ensures ultimate display performance in compliance with a standard four-times more stringent than Microsoft's Vista requirements from each and every monitor that leaves the factory - not just a few review samples. Only Philips goes to these lengths to deliver this exacting level of color accuracy and display quality in every new monitor.

USB or Universal Serial Bus

A smart plug for PC peripherals. USB automatically determines resources (like driver software and

bus bandwidth) required by peripherals. USB makes necessary resources available without user intervention.

● USB eliminates "case anxiety" -- the fear of removing the computer case to install add-on

peripherals. USB also eliminates adjustment of complicated IRQ settings when installing new peripherals.

● USB does away with "port gridlock." Without USB, PCs are normally limited to one printer,

two Com port devices (usually a mouse and modem), one Enhanced Parallel Port add-on (scanner or video camera, for example) and a joystick. More and more peripherals for multimedia computers arrive on the market every day. With USB, up to 127 devices can run simultaneously on a computer.

● USB permits "hot plug-in." There's no need to shut down, plug in, reboot and run set-up to

install peripherals. And no need to go through the reverse process to unplug a device.

In short, USB transforms today's "Plug-and-Pray" into true Plug-and-Play!

Hub

A Universal Serial Bus device that provides additional connections to the Universal Serial Bus.

Hubs are a key element in the plug-and-play architecture of USB. The Figure shows a typical hub. Hubs serve to simplify USB connectivity from the user's perspective providing low cost and complexity.

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