LCD Television Liquid Crystal Display television is a television using LCD technology for its visual outputs. It is based on the properties of polarized light where 2 thin panels push together a thin liquid-crystal gel that is divided into individual pixels. An X/Y grid of wires then allows each pixel to be individually activated. Ethical Issues Television networks usually try to exercise professional judgment and avoid offending viewers. Some stations like to follow the code of conduct rules as a guideline. When a program does offend a viewer, certain outcomes can occur such as: 1. The viewer may write a letter of complaint to the television network. 2.The viewer may take legal suit against the television network, whether it be a certain department or individual. 3.The viewer can contact a consumer group and register a concern. It is then up to them to decide whether or not to make the complaint public. They can do this by : · Mailing complaints letters to the local newspaper about the programming or advertising. · Informal complaints. · Public demonstration. · Formal complaints such as a court. If the complaint viewer and the television network or group/individual do not resolve the issue, laws are in place to try and help resolve the dispute. No matter how big or small the dispute, the television network will not take it lightly. Because of the amount of complaints television networks receive, it was a necessity to form a group of professional television journalists to establish an ethical guide to programming and advertising. Sometimes even, these journalists are called to court. Impacts of LCD Televisions on society & the Environment Though LCD televisions are a new way of finding out the latest media news, statistics show that children concentrate more on watching TV rather than reading or writing. Statistics state that student achievement in both reading and writing has been declining in recent years. The NCES Reading Report Card shows that across grades 4, 8 and 12, no more than 40% achieved the ‘proficient’ level of reading and only 7% of 4th graders, 3% of 8th graders and 6% of 12th graders could read at the ‘advanced’ level. Television can also provoke migraines with its brightness and flickering lights Factors contributing to the Success or Failure Advantages: ° LCD televisions have a long life with the exception of having between 30 and 50 000 hours bulb life. ° It is fairly reasonable and good for still images such as computer display. ° It hangs on the wall making the television a space saver. ° It has reduced power consumption. ° Improved colour rendering that is more true to life since the white light is produced from frequencies that are closer to those of the three primary colours. ° Improved video performance that is similar to CRT TVs ° Longer life that is typical twice that of CCFL based models. ° Allow you to view both your PC and TV signal input. Future advantages: ° LCD panel makers are addressing their efforts towards the next generation LCD production techniques. These are expected to be lower in production costs– therefore rendering 50-inch LCD televisions more competitive against the same sized plasma display panel TVs. ° Sony president and chief operating officer, Kunitake Ando, said recently that future LCD televisions will be the centre of home entertainment networks, allowing consumers to access data and services found on other devices connected to the network. ° Other technology and consumer electronics companies, such as Microsoft, Intel and Philips, have recently begun exploring similar plans allowing vast amounts of visual data to be pumped from storage system LCD viewing systems in homes, boats and offices. Disadvantages: ° Pixel failure is a problem with no name LCD screens as they have extremely poor pixel policies. ° LCD screens also inherent delay problems. For example, when a fast moving object moves across a LCD screen, the delay of LCD technology causes a trail of the image; the screen cannot keep up. ° Known name 35 inch screens can get extremely expensive. ° Cheap no name LCD TV’s have very poor picture quality and poor video performance. ° For LCDs dot electrodes situated on every sub-pixel red green and blue. These, by contrast, are prone to failure over the life span of the LCD TV. They cannot be individually replaced. ° LCDs are difficult to produce in larger sizes while minimizing pixel defects.
This is seen by the fact that there are no displays greater than 32 inches. Factors affecting Lifecycle The backlight of an LCD television has a lifespan of roughly 50 000– 80 000 hours. This backlight can also be replaced if need be. Assuming that the TV gets 4 hours of viewing per day, an LCD would approximately last around 25 to 40 years. Other reasons can relate to the area in which the television is in. Climate can be a factor as overheating may cause the television to hibernate. The position in which the television is in (e.g.: where the televisions exhaust fan may also cause the television to overheat). The quality of care the owner has given the television is also a major factor. If the television has repairs before 25 years of its life, it is a major decrease in the life span of the television.