Plasma versus LCD TVs PDF

Preview

Summary

lkjhgf jgf jhg jhg jhg jh jk h hg k iuy iuy oiu oiu iu oiuy oiuy igf oiuy kjhgf kjhgf kiu kjhg khgf kjhg kjhg kjhg kjhg kjhg kjhg...

Description

Date: Monday, July 19, 2021

Name: Halla Zarroug

Plasma versus LCD TVs For this assignment you will be writing a report based on the guiding questions. You should use a variety of resources to help in your research. Some of these resources can be source materials from the library, magazines, newspapers, and relevant websites. Your report should be written using correct grammar and spelling. Be sure to reference your information. Guiding Questions:

1. Who contributed to the invention of the LCD and Plasma TV and what did s/he contribute? George H. Heilmeier, of the Radio Corporation of America (RCA), is an electrical engineer who helped design a type of screen display that projected images using liquid crystals in the 1960s – technology that is today found in phones, digital watches, computer monitors, and flat-screen televisions. He introduced the professional world to a liquid crystal display in 1968. It works best at a temperature of around 80°C. That is when flat television that hung like a picture on the wall, became a reality.

2. Who was the first to invent a LCD and Plasma TV? Professors Donald Bitzer and Gene Slottow, as well as graduate student Robert Willson, invented the first prototype for a plasma display monitor in July 1964 at the University of Illinois. Successful plasma televisions, on the other hand, were not available until the development of digital and other technologies. A plasma display is an emissive flat panel display that uses phosphors that are stimulated by a plasma discharge between two flat panels of glass to produce light.

3. Describe how a LCD and Plasma TV work. Provide details about the nature of the pixels and contrast ratio, and source of light that each uses. Include a diagram showing how the light and colour is produced. Plasma TVs have a slight advantage over LCD TVs in terms of overall picture quality, although LCDs are catching up thanks to advances such as LED backlighting. The most significant distinction is in display technology. Plasma televisions produce light using ultraviolet light. Millions of red, green, and blue picture elements are placed between two slabs of glass in plasma televisions. Each pixel element in plasma has an inert gas that creates ultraviolet turning and excites phosphors inside the colour elements to produce light when charged. LCD panels trap a liquid crystal solution between two sheets of polarised glass and display it on a screen. The liquid crystals rotate when an electric current travels through them, changing the polarisation of the light travelling through them in response to the applied voltage. As a result, more or less light passes through the polarised glass and reaches the display's face. LCD panels do not produce light; instead, they filter or subtract light from a backlight source to form the image on the panel surface. The contrast ratio compares the darkest black to the brightest white. With a contrast ratio of up to 3000:1, plasma TVs excel in this area. LCD TVs have a contrast ratio of up to 1000:1, however, this parameter is calculated differently for LCDs, so the comparison isn't fair. Regardless, plasma TVs have a higher contrast ratio than LCD TVs.

Plasma TV

LCD TV

4. What are some of the advantages and disadvantages each type of TV.

Advantages: Plasma TV

● Excellent brightness (since it uses direct lighting from phosphorus, and not a backlighting system like LCD TVs, the image is

Disadvantages: ● Expensive ● Susceptible to phosphor burn-in ● Shorter life span ● Not as high resolution as LCD (highest resolution

LCD TV

crisper and brighter) ● PC monitor-capable (It can be plugged directly into any PC) ● Progressive by nature (A scanning electron beam is not used to form a picture in plasma systems. Instead, all of the pixels on the screen are illuminated at the same time. As a result, any plasma system will display progressive video sources.) ● A wide viewing angle

offered today is 720p resolution) ● Poor reproduction of black (black appears as grey)

● Extremely high resolutions are available. (LCDs have no trouble reaching HDTV resolutions.) ● Color is fantastic. (LCDs have excellent colour reproduction, with the ability to recreate colours across the spectrum in stunning detail.) ● They produce a higher-quality image. LCDs, instead of using a standard bulb as a light source, employ an LED light. Because the LED emits a more natural light. ● Efficiencies in

● For their size, they are slightly more expensive. ● Blacks have a low rate of reproduction. (LCDs do a poor job of replicating dark images when compared to directview tube displays.) ● Viewing angle is restricted. (LCDs have a poor viewing angle by design.) You won't get a nice view unless you sit almost exactly in front of the screen.) ● Brightness is limited (The LCD displays have lower contrast and are harder to view in a brightly lit room)

energy ( LCD HDTVs are possibly the most environmentally friendly HDTVs.) ● Capable of using a computer monitor ● There will be no burn-in (long lasting) ● LCDs are built to support progressivescan sources like progressive-scan DVDs and HDTV. LCDs have millions of tiny transistors that can be controlled individually by the display's "brains."

5. Based on the information you’ve collected, which type of TV do you think you would buy and why? After researching and collecting information on both plasma TVs and LCD TVs, I realized that both types of TVs provide excellent picture quality, but they do so in different ways. It all just depends on the buyer and what they want and need when they come looking for a new TV.

6. References https://www.thoughtco.com/history-of-plasma-television-1992321, https://www.dummies.com/consumer-electronics/home-theater/pros-and-cons-ofplasma-displays/, https://www.cnet.com/tech/home-entertainment/plasma-vs-lcdwhich-is-right-for-you/...