Summarizing the above entries, there are three concerns:
1- What if an LED burns out? 2- What if an LED "dims" over time? 3- It isn't true-black, because they pump up the brightness to get their "1,000,000:1 levels"
1 - If an LED burns out, you go to your warranty card, and you have them replace either your entire set, or the faulty LED. That's what warranties are for. That's the best that any TV manufacturer can do for you (LCD, Plasma, CRT, whatever).
2 - If an LED goes dim, then the set can presumably detect the variation in impedance, and pump more power to that LED. I am not just taking a guess here. This set (by LG) can individually dim and brighten the LEDs. It controls them with some kinda on board logic system which is very responsive.
3 - The 1,000,000:1 is not achieved solely by brightening the backlight. It is achieved in part by the ability to DIM the backlight LEDs. This way, areas where there is no light being shown (black parts of the screen) are dimmed from the rear, rather than relying on the LCD's "windowshade" technique of just trying to block out all light.
It is this windowshade technique which is the LCD's Achilles' heel. The fact that the projected light is always at the same intensity, and therefore to get black, you have to try hard to "cover it up". You end up with the black areas of your screen giving just "dark gray". But this technology allows areas which are entirely dark to be dimmed down to near total black. LG has fixed the problem that plagues LCD here.
But what about the areas of the screen where there is "some" light. (Imagine the moon on the left side of the screen, on a darkened sky). Those areas will be tricked by your own eye. You look near the moon, and its not completely dark... bummmer... but luckily your eyes compensate, because you're looking at the moon. Your pupil dilation decreases (in milliseconds).
When you look to other (black) areas, your pupils re-dilate, but now you are looking at areas where the LEDs themselves are progressivly dimmed (as they move away from the part with the moon). See?
HP has had plenty of time to fine-tune its finger-friendly TouchSmart software, and now, its newest model, the TouchSmart 610, ushers in a fresh design, highlighted by a hinge that allows the display to slide down and lie nearly flat.
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Summarizing the above entries, there are three concerns:
1- What if an LED burns out?
2- What if an LED "dims" over time?
3- It isn't true-black, because they pump up the brightness to get their "1,000,000:1 levels"
1 - If an LED burns out, you go to your warranty card, and you have them replace either your entire set, or the faulty LED. That's what warranties are for. That's the best that any TV manufacturer can do for you (LCD, Plasma, CRT, whatever).
2 - If an LED goes dim, then the set can presumably detect the variation in impedance, and pump more power to that LED. I am not just taking a guess here. This set (by LG) can individually dim and brighten the LEDs. It controls them with some kinda on board logic system which is very responsive.
3 - The 1,000,000:1 is not achieved solely by brightening the backlight. It is achieved in part by the ability to DIM the backlight LEDs. This way, areas where there is no light being shown (black parts of the screen) are dimmed from the rear, rather than relying on the LCD's "windowshade" technique of just trying to block out all light.
It is this windowshade technique which is the LCD's Achilles' heel. The fact that the projected light is always at the same intensity, and therefore to get black, you have to try hard to "cover it up". You end up with the black areas of your screen giving just "dark gray". But this technology allows areas which are entirely dark to be dimmed down to near total black. LG has fixed the problem that plagues LCD here.
But what about the areas of the screen where there is "some" light. (Imagine the moon on the left side of the screen, on a darkened sky). Those areas will be tricked by your own eye. You look near the moon, and its not completely dark... bummmer... but luckily your eyes compensate, because you're looking at the moon. Your pupil dilation decreases (in milliseconds).
When you look to other (black) areas, your pupils re-dilate, but now you are looking at areas where the LEDs themselves are progressivly dimmed (as they move away from the part with the moon). See?