Advantages of LCD TVs

LCD panels are two layers of polarizer and liquid crystal pasted together. When current pass through individual crystals these liquid crystals change their orientations. So they either block or pass the back light through them. The amount of light pass through depends on the signal. So here the light is coming from the backlight and no light is produced by the LCD.

Since LCD TVs don’t have any phosphors like CRT or plasma, they consume less power. It is the power required for backlight fluorescent tube. Because of this there is no radiation problem associated with.

LCD TVs ADVANTAGES over Plasma
No burn-in of static images.

Cool running temperature.

Higher image brightness over Plasma.

Low power consumption, than plasma counterpart.

Longer display life is expected. The backlight lamp usually has life span of more than 60,000 hrs.

Disadvantagedof LCD

LCD TVs have low contrast ratios than Plasma TVs. So in a considerably bright room, the blacks will not be 100% black. They look dark grey.

LCD TVs are associated with motion blur in fast moving pictures. It is an inherent artifact of LCD TV. Present day LCD panels use higher refresh rate so that the image appears smooth without blur. Normally they use 120 to 240 Hz refresh rates.

Very large screen panels are not available. Normally they are limited to less than 46”. But plasma can go up to 65 and more.

Dead pixel issues. Just like plasma burn-in LCD panels have a rare dead pixel problem. In that case the particular pixel remains lit or black. So they are either black or white. These individual dead pixels cannot be repaired. When the number of dead pixels become higher than manufacturer standard or if they are annoying then the panel need to be replaced.

LCD TVs are more expensive than plasma TVs.