| What does LCD TV mean and how does it function? | | | | an LCD TV should last for about 20 years. The life |
| LCD stands for liquid crystal display. Behind the screen | | | | span of an LCD TV is dependent on the back-light. |
| are a number of pixels followed by a fluorescent light. | | | | Since it uses a liquid crystal, there is nothing else which |
| When this light falls on the pixels, an electric current is | | | | can wear out other than the back-light. Technology |
| generated, creating light variations, which make up the | | | | has found a way around this problem by creating |
| vividly colored images that we see. Generally, the | | | | replaceable back-lights as well. |
| twisted nematic liquid crystal is used which has a | | | | Power consumption, which is perhaps a very important |
| naturally twisted crystalline structure. | | | | aspect, has a definite advantage in case of LCD TVs. |
| The screen size of an LCD TV varies between 13-46 | | | | LCD TVs utilize fluorescent back-lighting and so power |
| inches and it is about 2 inches deep in thickness. They | | | | consumption is low and steady. |
| are very light and so extremely easy to install. This | | | | LCD TVs are unaffected by changes in air pressure. |
| indicates that they require very little space and come | | | | This makes it a favorite among air travelers. The |
| with a very sleek look. In fact, they can very well be | | | | performance is consistent and the picture flawless, |
| compared to the fragile beauty of a woman! | | | | regardless of the altitude of the airplane. |
| Next is the consideration of the 'burn-in' factor. LCD | | | | There is much talk about mercury being used for the |
| TVs are not susceptible to 'ghosting' which results due | | | | fluorescent lighting. But, the manufacturers will |
| to premature dying out of the pixels. The uniquely | | | | vouch-safe for the fact that a nominal amount of |
| twisted crystals do not allow 'burn-in' or 'ghosting' to | | | | mercury is used. This mercury does not come in |
| happen. | | | | contact with the viewer and so is entirely harmless. |
| There has been a marked improvement in the refresh | | | | Some manufacturers are trying to incorporate |
| rate or response time of LCD TVs. Previously, the | | | | picture-in-picture feature in their monitors. This feature |
| images tended to lag behind and stay on screen for a | | | | enables a viewer to see one program on the full TV |
| period of time that was much more than necessary. | | | | screen while a few other programs can run in small |
| Recent technological advances have put all that | | | | windows in it. The viewer gets the added advantage |
| behind. Usually, the response time varies with the size | | | | to watch a particular program, while waiting for the |
| and quality of the LCD TVs. | | | | intermittent advertisements to end in another window. |
| The contrast ratio in the more advanced LCD TVs is | | | | Experiments are on to extend color reproductions in |
| 1000:1. The contrast ratio is measured by the ratio | | | | LCD TVs. The idea is to use two back-lights with |
| between the brightest white to the darkest black. The | | | | slightly differing intensities of colors in consecutive |
| scenario has improved here too. Research is on to | | | | frames. This will enable the viewer to experience a |
| push the ratio well past the 1000:1 mark. | | | | better and a more vivid picture using a more precise |
| Sixty-thousands hours is the average life span of an | | | | color variation. |
| LCD TV. So at an average viewing of 8 hours a day, | | | | |