University:
California State University, Northridge
Course:
COMP 222 | Computer Organization
Academic year:

2024
Views:

360

Pages:

17
Author:

Oscar Bishop

LCD Monitors LCDs Advantages & Disadvantages Advantages of LCDs • Physical Size – Compact and Lightweight – Space saving – Can be mounted on a wall or panel Advantages of LCDs • Display Size – Available at comparable in screen size as traditional CRT – Shown on the next slide, a 12.1" LCD display (left) has only a slightly smaller viewing area than a typical 14" CRT monitor. Newer, larger LCD monitors are also appearing that have 15", 17", and even larger screen sizes that are comparable to the largest CRT monitors. (One thing to note is that LCD monitors are typically sized by their actual viewable diagonal measurement, but CRTs typically are not.) Advantages of LCDs Advantages of LCDs • Power Consumption and Radiation Emission – Consume less energy and more durable • A typical CRT losses approximately 50% of its brightness after 10,000 hours. An LCD bulb will maintain its brightness anywhere from 25,000 to 50,000 hours. • LCD consumes fewer watts than a CRT. LCD will use an average 30 watts compared to 120 watts for the CRT. • Can reduce electric bill by 40-85%. • Uses a combination of fluorescent-based backlight, color filters, transistors, and liquid crystal to create and illuminate images. It blocks light rather emit light Advantages of LCDs • Power Consumption and Radiation Emission – Doest not emit Radiation – Not subject to Electromagnetic Interference Advantages of LCDs • Viewing – Cause less eyestrain – Does not flicker or glare Advantages of CRT • Color – Most are capable of displaying unlimited colors. • Resolution – Multiple video Resolutions. Advantages of CRT • Response Time – Faster response time. Critical to people who watch videos or play games on their PC’s. – The fastest LCD’s offer a response time of about 25 milliseconds as apposed to CRT’s that have a response time of about 13 milliseconds. Advantages of CRT • Viewing Angle – Look @ a very wide angle Disadvantages of LCDs • Resolution • Displays Native Resolutions (Resolution that it displays best) • Viewing Angle • Smaller, needed to be viewed more directly from the front. • From the side the images on an LCD screen can seem to disappear, or invert colors. • Newer displays that are coming out have a wider viewing angle so this is not as much of an issue as it has been in the past. Disadvantages of LCDs • Price – Upfront cost it is more costly but long-term cost but will conserve energy in the long run. – The energy savings may not be much for an individual use, but for a corporate office where 50 displays or more are in use, the energy savings might be more of an issue. Disadvantages of LCDs • Installation – Need a plug interface to connect to the computer. – Some require a special digital plug-interface in order to work . – Problem: is that this plug is not available on most computers, so another video card or adapter must be purchased to plug these LCD monitors into the computer. Disadvantages of LCDs • Response Time – It is much slower. The delay can cause a ghosting effect on images it displays. Disadvantages of CRTs • Physical size – Takes more desktop space. Disadvantages of CRTs • Power Consumption and Radiation Emission – Consumes more energy – Emits harmful radiation. The metal shield behind the glass of your monitor protects your body from a flood of radiation. – It holds a dangerous electrical charge even after turned off and can last up to several years and be hazardous and even deadly to anyone who opens a CRT monitor casing. – Know to cause fires due to electrical malfunctions and excessive heat if the ventilation holes are accidentally covered up.