| CRT TVs ruled at the top of large screen display | | | | the heavy glasses used in CRT are dispensed |
| technology since the year 2007, when their | | | | with. This takes off a large chunk of weight load |
| dominance ended. That year saw the worldwide | | | | from the TV. Furthermore, the thickness of the |
| sales of CRT being overtaken by the sales of | | | | screen display is less in case of LCD. Theoretically, |
| LCD TV. Coming from the era of great | | | | LCD technology based TVs can be made in any |
| technological feats achieved in the TV technology, | | | | size. The only limiting factor will be production |
| the Liquid Crystal Display (LCD) technology has | | | | yields. The more the yield the wider is the screen |
| many advantages over the Cathode Ray Tube | | | | size. The image quality of the current LCD TV is |
| (CRT) technology. | | | | better than the earlier versions. The innovation |
| The tube in the CRT TV has to maintain vacuum | | | | involving the ‘Overdrive' technology and the |
| since the electrons could have got deflected due | | | | adding of memory to hold the contents of the |
| to the presence of the gas molecules. The | | | | display, has improved the response times |
| passing of the current excites the electrons and | | | | significantly. Further improvement is likely by |
| the same need to be focused on to the display | | | | making use of ‘super-sampling'. The contrast |
| after accelerating their motion. This heated the | | | | ratio is another area where these TVs are |
| tube and also restricted the use of display screen | | | | evolving technologically. The ‘dynamic |
| to up to 30 inches in width. The various quality | | | | backlighting' is being made use of to improve the |
| parameters were inferior and audio-visuals did not | | | | contrast ratios so that the black or near black |
| give a great viewing experience as compared | | | | scenes do appear black. |
| with the current display devices. | | | | |
| | | | | If someone were to assume that the LCD TVs |
| LCD technology removed these limitations and | | | | are better in power consumption as compared to |
| provided many new and exciting features. The | | | | the CRT, than that is not the case. These |
| CCFLs provide the back light (can also be replaced | | | | consume almost same amount of power as the |
| by LEDs) in a LCD TV. The white light is | | | | CRT ones, so you cannot think of effecting |
| selectively filtered. Millions of shutters and the | | | | savings on your power bill by getting the LCD |
| associated colour filters ensure that only the red, | | | | based TV installed. |
| green and blue light is made to pass through them | | | | LCD TV technology is still evolving and it cannot |
| in a measurable quantity. It make use of the | | | | be said that the best of LCD has been achieved. |
| principles of polarization of light to display the light | | | | There is a lot of scope for improvement in the |
| in the image colours on the screen. The small | | | | image quality parameters where it rivals like |
| vacuum in LCD is contained in the CCFLs only. | | | | plasma TVs and even the good old CRT TVs still |
| | | | | score over better. |
| The LCD displays are far lighter in weight since | | | | |