Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Copyright © 2005 by The McGraw-Hill Companies,

Slides:



Advertisements
Similar presentations
Computer Graphics Prof. Muhammad Saeed. Hardware (Display Technologies and Devices) III Hardware III Computer Graphics August 1,
Advertisements

Chapter 5 – Part 2 Input and Output
Monitors and Sound Systems
Computer Graphics- SCC 342
Introduction to Raster scan display C A E D C Computer Aided Engineering Design Centre.
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies,
Lecture 5 Video and Sound.
Monitors and Sound Systems lesson 5 This lesson includes the following sections:  Monitors  PC Projectors  Sound Systems.
Display Devices Display device: output device that presents output visually Monitor/Display screen: The display device used with desktop computers, notebook.
General Monitor Info! By Merk and Cody!. Glowy-ness Actually known as Luminance, which is an indicator of how bright the surface will appear. Since human.
EET 450 – Advanced Digital Video Display Systems.
Output Devices Lecture 4 Output Devices Md. Mahbubul Alam, PhD PRESENTED BY MD. MAHBUBUL ALAM, PHD 1.
Your Interactive Guide to the Digital World Discovering Computers 2012.
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies,
Computer Monitors B. Konkoth. Types of monitors CRT Cathode Ray Tube LCD Liquid Crystal Display.
Terms 1. VGA VGA - Short for Video Graphics Array, VGA is a popular display standard developed by IBM and introduced in 1987 VGA provides 640 x 480 resolution.
Monitors and Sound Systems section 3A This lesson includes the following sections: · Monitors · PC Projectors · Sound Systems.
Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals Presentation 40 – Displays and Resolution.
Examining Display Devices Computer Concepts Unit B.
1 CCTV SYSTEMS CCTV MONITORS. 2 CCTV SYSTEMS A monitor simply allows remote viewing of cameras in a CCTV system from a control room or other location.
 A monitor or display is an electronic visual display for computers.  The monitor consists of : o the display device o circuitry o enclosure The display.
Monitor. The Basics Often referred to as a monitor when packaged in a separate case, the display is the most-used output device on a computer. The display.
Lecture Computer Applications to Business 1 Video and Sound.
Standard Grade Computing COMPUTER STUDIES Standard Grade OUTPUT DEVICES Chapter 17.
LIS508 lecture 6: output devices Thomas Krichel
Information and Communication Technology Fundamentals Credits Hours: 2+1 Instructor: Ayesha Bint Saleem.
Peter Norton, 6 th edition By: Rena Essa. Lesson 4A: Video and Sound.
Seeing, Hearing, and printing Data
10-1 Video Section Objectives After completing this section you will be able to:  Describe the components of the video subsystem  Differentiate.
Output Thomas W. Davis. What is Output? Output it data that has been processed into a useful form Output includes: Monitors Printers Speakers Etc.
PC Maintenance: Preparing for A+ Certification Chapter 16: Monitors.
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies,
Peripherals The term peripherals refers to all hardware devices that are attached to your computer and are controlled by your computer system Peripherals.
CHAPTER 1 Installing and Supporting I/O Devices Suraya Alias.
display screens and ergonomics
Lecture No. 3.  Screen resolution  Color  Blank space between the pixels  Intentional image degradation  Brightness  Contrast  Refresh rate  Sensitivity.
Video Monitor Uses raster scanning to display images –Beam of electrons illuminates phosphorus dots on the screen called pixels. Starting at the top of.
Introduction to Display Devices. Monitor Overview Display device that forms an image by converting electronic signals from the computer into points of.
Video Monitor CRT: Cathode Ray Tube
Monitors and Sound Systems Section 3A. Objectives List the two most commonly used types of computer monitors. Explain how a CRT monitor displays images.
Hardware used in Multimedia Systems. Hardware demands on multimedia systems Multimedia puts huge demands on a computer system, so designers and users.
Lecture # 4 Output Devices. Output Devices Devices that convert machine language into human understandable form. Output can be in display form, on paper.
Introduction to Graphical Hardware Display Technologies
2/1 A Look at Monitors Roll call Video: monitors Step-by-step lecture.
INPUT AND OUTPUT COMPUTER DEVICES PENGANTAR TEKNOLOGI INFORMASI (A)
Nicole Juli Nicolás Uriarte 1o 1 St.Brendan´s 2011.
Computer Fundamentals MSCH 233 Lecture 5. The Monitor A Monitor is a video screen that looks like a TV. It displays both the input data and instructions,
Output devices Prof. K Regis. Types of output devices Monitor Printer Speaker Plotter.
K.B.H.POLYTECHNIC,MALEGAON CAMP, MALEGAON. Computer Hardware & Maintenance. S.Y.C.M/I.F Guided By :- Mr.K.S.Pawar. Lecturer in Computer Department.
Introduction to Computers Lesson 3A. home Two Kinds of Monitors Cathode ray tube (CRT) Flat-panel display.
10/19 Monitors CRT monitors: Flat-panel displays Electron guns
Week 9 Monitors and output to the screen. Monitors, also known as Visual display units (V.D.Us) Desktop computers contain a Cathode Ray Tube (C.R.T.)
Components of Computer. Output The data that has been processed into useful information is called output. Types –Screen – soft copy –Printer – hard copy.
1.  The primary output device in a graphics system is a video monitor. These monitors are based on Cathode Ray Tube (CRT) design.  CRT is a vacuum tube/electron.
The Cathode Ray Tube Monitor
Video Display and Audio Systems Basic PC Maintenance, Upgrade and Repair Mods 1 & 2.
Display devices and interfaces
DISPLAY DEVICES CIS 10, Group #1 April 01, 2006 C. X. A. L. K. H. A. V. ((( L. C.
FIFTH MEETING.
Chapter 02 Video and Sound.
CSC 101 Introduction to Computing Lecture 6
Types of monitors CRT Cathode Ray Tube LCD Liquid Crystal Display.
McGraw-Hill Technology Education
Video, Sound and printer
Introduction to Computers
Monitors and Sound Systems
Chapter 2 Overview of Graphics Systems
This lesson includes the following sections:
McGraw-Hill Technology Education
McGraw-Hill Technology EducationCopyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology EducationCopyright © 2006.
Presentation transcript:

Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved.

Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Chapter 3A Video and Sound

4A-3 Monitors Most common output device Connects to the video card Categorized by color output –Monochrome One color with black background –Grayscale Varying degrees of gray –Color Display 4 to 16 million colors

Monitors Cathode Ray Tube (CRT) –Most common type of monitor –Electrons fired from the back –Electrons excite phosphor to glow –Phosphor is arranged in dots called pixels –Dot mask ensures proper pixel is lit –3 Electron beams for colored CRTs –A pixel contain 3 phosphors for colored CRTS –Shadow mask used to align electron beams

Monitors

CRT color –Phosphor dots arranged in triads –Red, green, and blue dots –Three colors blend to make colors –Varying the intensity creates new colors

Monitors Raster Scan The beam paints one line across the screen from left to right. It then quickly flies back to the left side, moves down slightly and paints another horizontal line, and so on down the screen, like this:

Monitor horizontal retrace - the beam moving back to the left at the end of each line vertical retrace - movement from bottom to top.

Monitors CRT drawbacks –Very large –Very heavy –Use a lot of electricity

Monitors Liquid Crystal Display (LCD) –Commonly found on laptops –Desktop versions exist –Solve the problems of CRT

Monitors

Passive matrix LCD –Pixels arranged in a grid –Pixels are activated indirectly Row and column are activated –Animation can be blurry

Monitors Active matrix LCD –Each pixel is activated directly –Pixels have 4 transistors One each for red, green, blue One for opaqueness –Transistors arranged in a thin film –Animation is crisp and clean

Monitors Drawbacks to LCD –More expensive than CRT –Must sit directly in front of screen –Can be more fragile than CRT

Monitors Paper-white displays –High contrast between fore and background Electro-luminescent displays (ELD) –Similar to LCD –Uses phosphor to produce light Plasma monitor –Gas is excited to produce light

Monitors Ports –VGA Port Because most CRT monitors require the signal information in analog form and not digital, they typically use an analog connection.

Monitors Ports –DVI Port DVI keeps data in digital form from the computer to the monitor. There's no need to convert data from digital information to analog information.

Monitors Ports –HDMI Port

Monitors and Video Cards Monitors impacts user effectiveness Monitors should have –Crisp text –Clear graphics –Adjustable controls –Clear edges

Monitors and Video Cards Size of monitor –Measured in inches –Measured diagonally –Actual size Distance from corner to corner –Viewable size Useable portion of the screen

Monitors and Video Cards

Dual/Triple Monitors Setups

Monitors and Video Cards Resolution –Number of pixels on the screen –Higher number creates sharper images –Higher number creates smaller images

Monitors and Video Cards Refresh rate –Number of time the screen is redrawn –Modern equipment sets this automatically –Improper settings can cause eyestrain

Monitors and Video Cards Dot pitch –Distance between the same color dots –Ranges between.15 mm and.40 mm –Smaller creates a finer picture –Should be less than.22

Monitors and Video Cards Aspect ratio –4:3 –16:9 –720p or 1080p

Monitors and Video Cards More Details regarding LCDs –Brightness or Luminance –Contrast Ratio The contrast ratio rates the degree of difference of an LCD monitor's ability to produce bright whites and the dark blacks. Good LCDs have a ratio of 20000:1 –Response Rate The response rate indicates how fast the monitor's pixels can change colors.

Video Cards Function is to generate and output images to display Device between the CPU and monitor Better cards result in better output Removes burden of drawing from CPU Have their own processor and RAM Modern cards have up to 2 GB RAM Capable of rendering 3D images

Video Cards

Components of a Video Card –GPU A GPU is a dedicated processor optimized for accelerating graphics. The processor is designed specifically to perform floating point calculations, which are fundamental to 3D graphics rendering. –Video BIOS The video BIOS or firmware contains the basic program, which is usually hidden, that governs the video card's operations and provides the instructions that allow the computer and software to interact with the card.

Video Cards –Video memory The memory capacity of most modern video cards ranges from 128 MB to 4 GB –RAMDAC Random Access Memory Digital-to-Analog Converter, converts digital signals to analog signals for use by a computer display that uses analog inputs such as CRT displays. –Outputs

Ergonomics and Monitors Eyestrain –Fatigue of the eyes –Steps to avoid Choose a good monitor Place the monitor 2 – 3 feet away Center of screen below eye level Avoid reflected light Keep refresh rate at 75

Ergonomics and Monitors Electronic magnetic fields (EMF) –Generated by all electronic devices –EMF may be detrimental to health –Steps to avoid Keep the computer at arms length Take frequent breaks Use an LCD monitor

Data Projectors Replaced overhead and slide projectors Project image onto wall or screen LCD projectors –Most common type of projector –Small LCD screen –Very bright light –Require a darkened room

Data Projectors Digital Light Projectors –A series of mirrors control the display –May be used in a lighted room

Sound Systems Integral part of the computer experience Capable of recording and playback Speakers –2.0 –2.1 –5.1 –7.1

Sound Systems Sound card –Device between the CPU and speakers –Converts digital sounds to analog –Can be connected to several devices –Modern cards support Dolby Surround Sound

Sound Systems Headphones and headsets –Replacement for speakers and microphones –Offer privacy –Does not annoy other people –Outside noise is not a factor –Headsets have speakers and a microphone

Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill Technology Education Chapter 3A End of Chapter