The differences in performance between LCDs and plasmas are almost negligible at this point where there are minor advantages and disadvantages to both.
Newer plasmas are less susceptible to this thanks to improved technology and features such as screen savers, but burn-in can still be a problem. However, after a few days most burnt-in images will fade & mash; they are no longer permanent.
LCD (Video Memory)
Burn in is one of the most commonly misunderstood concepts regarding television displays. Burn in is a phenomenon associated to television products, where a static image left on the screen, over time, can permanently wear itself into the display. This phenomenon is generally associated to phosphor based television displays, such as tubes, CRT rear projection, and plasma.
A common question is if LCD televisions are susceptible to burn in. The most common answer to this question is no, LCDs are immune to burn in. However, this answer is somewhat of a half-truth. It is a fact that LCD displays are immune to phosphor wear, simply because LCD televisions do not use phosphor to create a television image.
LCD displays have certain characteristics that do not make them completely immune to static images. On LCD displays it's kindly referred to as "video memory." LCD panels use a complicated process of organizing liquid crystal molecules into a twisted or untwisted state, which allows polarized light to pass through the liquid crystal substrate. Over time, it is possible the liquid crystals can "get used to" the state of twist they are in, causing a static image, similar to phosphor burn-in, appear on the screen.
You'll only get video memory buildup on an LCD television if you try to do it on purpose.
LCD finally caught up to the quality of plasma with the introduction of LED-backlighting. Instead of lighting the screen with fluorescent tubes, as is traditional, it uses banks of LED lights. There are two types of LED lighting: direct and edge. Direct back-lighting results in better images as manufacturers are able to turn sections of the screen lighting off & mash; meaning better contrast. Edge-lighting is as it sounds, using a series of LEDs along the edge of the screen to light the LCD panel. The TV then uses mirrors and light guides to illuminated the screen. Most thin LCDs will use this method. Look out for more LED-backlit screens this year, but they are NOT a new category of screen, and not to be confused with OLED.
Motion blur is not as significant with the newer 120hz LCD TV's
I would put this LCD on your list of Tv's to consider.
52" Toshiba 52XV545U
- Elegant double skin high-gloss black finish
- CineSpeed 10-bit LCD panel
- ClearFrame 120Hz anti-blur technology with 5:5 pulldown
- SRT upconversion improves the look of 480i/480p/720p resolution sources
- AutoView automatically adjusts the picture based on ambient room light
- 4 x HDMI v1.3 â€” accepts signals up to 1080p (60Hz, 24Hz)
- Optical digital audio output for DolbyÂ® Digital
- Detachable swivel stand/wall-mountable (bracket not included)
- ColorBurstâ„¢ Wide Color Gamut CCFL - Same lighting used in high-end Sony HDTVs.
- 5:5 pulldown / 24P support
- Semi-matte screen helps reduce glare
- Gaming mode that drastically reduces blur from high-speed console (PS3, Xbox 360) gaming.
- Lower contrast ratio than competing Samsung A650/A750/A850 lines, but negligible.
- Speakers arenâ€™t that great
Note: The 42â€³ 42XV545U uses a LCD panel made by LG/Philips where as a the 46â€³ 46XV545U and 52â€³ 52XV545U use LCD panels made by Samsung; the Samsung LCD panels have slightly better contrast and response time.
Toshiba 52XV545U Specification Sheet (PDF)