Most manufacturers will warranty their lamps for a set period of time, but outside of the warranty it is the consumers responsibility. It is commonly thought that DLP's will last longer, but their most problematic issue is a bad lamp, which could cost up to 400 dollars to fix.DLP units are usually lighter in weight, because there are less internal components.LCD units tends to produce a sharper image, but with the "Screen Door Effect" this may cause noticeable problems.DLP units can produce a higher contrast video with deeper black levels than an LCD.LCD units can develop irreparable pixels, which can leave small blank spots on your screen.LCD units typically have better color saturation than DLP.DLP technology has a competitive advantage over LCD in reduced pixilation, because the pixels are much closer together and produce a cleaner image.
common complaint of LCD technology is the "Screen Door Effect" which causes the image to appear pixilated.Even if the specs were a bit inflated this would still amount to a fantastic contrast ratio, on the order of 5 times that of a traditional CRTĭLP (Digital Light Projetion) - (add in after Letti comment.Thanks ) A unit shown by Toshiba at a Japanese trade show in April of 2005 even had it’s contrast ratio up to an incredible 100,000 to 1 by significantly reducing black luminance.use up to one-third less power than PDP panels of the same size.
produce pictures that are as bright as CRT pictures and they don't have the slight time delay sometimes seen with LCDs and PDPs (plasma display panels),. SED display is only an inch or two thick, depending upon screen size. These electrons are then accelerated by a higher voltage into a beam similar to that in a CRT display Electrons are ejected when a voltage of about 16 to 18 V is applied to the emitters. One of the plates is coated with phosphors the other is mounted with electron emitters. basic construction is two glass plates separated by a vacuum. since the 1990s, is a combination of CRT (cathode ray tube) and LCD (liquid crystal display) technologies. under development by Toshiba and Canon Inc. SED (Surface-conduction Electron-emitter Display) This promises to keep prices low as the technology is implemented. have fewer parts than LCD or plasma and can be manufactured using a novel ink jet printing process. At around 2mm deep, OLEDs are much thinner than either a plasma or LCD. Power usage is very low, less than 1/2 that of a traditional LCD display. have a wide viewing angle like a plasma display. emits it’s own light, so it requires no backlight and has better contrast than a traditional LCD. Developed by Kodak and Pioneer, this technology has been used for a few years in car stereo and cell phone displays. 
However, the latest generation of plasma displays from NEC is claimed to have a 60,000 hour life. Plasma displays should last 20,000 – 25,000 hours and LCDs should give 30,000+ hours of useful life.LCD TVs are a bit more expensive than plasmas at 42" and larger sizes,.
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Plasmas are also better at producing full motion video than LCDs because of the response time of the LCD panels, although this difference is disappearing. Plasmas generally have an edge in the ability to produce deeper blacks and more saturated colors than LCDs. This burn-in occurs when plasma units are used to display static images such as video game screens and stock or sports tickers. LCDs are immune to the burn-in that can affect plasma displays. CRT to LCDs to Plasma to OLED / SED / DLP
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