I want to buy my parents a 40 or 42 inch flat screen TV the living room at home is small, so I can

Plasma belongs to the principle of inert gas imaging,The biggest advantage is that it will never be produced when the picture is moving,The phenomenon of tailing and shadowing,And imaging is also similar to the picture tube TV we applied in the past,Its biggest disadvantage is that it is too heavy,And the power consumption is very high,For now,LED is the most advanced product,It is also the most energy-saving product,I looked at the model you wrote above,I personally recommend that you buy Samsung's40D6000,In fact, Samsung's picture quality is very delicate, And you're looking at a good Samsung machine, as for Sharp, to tell the truth, I don't know a lot, but I know that Sharp's appearance is very average, as for what technology you're talking about, those are invisible things, how to say it.

Plasma is referred to as PDP, I agree with the statement about PDP upstairs, and add that relatively speaking, PDP has a long life as LED, because there are many circuit boards behind the PDP screen, and if any one is broken, the whole thing will be broken, in fact, the PDP repair rate is indeed higher than that of LED.

If you don't have a bad money to buy LED, it is recommended to buy Sharp, because many of the LEDs sold by Samsung in China are bought in Taiwan, not produced by Samsung itself, and the Sharp screen is the original Japanese screen, which is still better than the Taiwan screen. You can also ask the seller,If Samsung TV uses Samsung's own screen,Of course, it's not bad,You can buy it。

As for which model, I don't think it matters, you mainly value its features. TVs of the same brand and series,The chips used,The so-called technology is similar。

And then what is it4Color Technology、Swift engine、Cool open TV,It's a gimmick,The technology of various brands of TVs is almost the same。