And though some manufacturers claim longer life than that, lamps do dim progressively with age. You won't be faced with the $350 (or thereabouts) lamp replacement cost that a set with a conventional UHP lamp will demand after about 2,000 hours. Plus, in theory at least, LEDs should last the life of the set. No more waiting until Tuesday for a lamp to warm up at turn-on or cool down at turn-off. It turns on and off nearly instantaneously. There are, however, at least two very real benefits to LED lighting. However, according to Texas instruments, a key improvement over a color wheel implementation is that the LEDs can be turned on in any order and for any length of time depending on the program material.
Rather than segments on a color wheel, it's the red, green, and blue LEDs that flash in sequence in this design. All single-chip designs require sequential color display, relying on the viewer's persistence of vision to knit them all together. Rainbows from here are caused by the sequential, rather than simultaneous, flashing of the primary colors. I still see rainbows here (though I admit to being very sensitive to them-some people aren't). Can this eliminate the rainbow effect that has been a persistent issue with single-chip DLP designs? At least in this Samsung set, it does not. LED lighting also eliminates the color wheel used in lamp-based, DLP displays. Fortunately, the Samsung can be set up for more accurate colors than it delivers out of the box-though even the latter are above average in accuracy-if you choose the right Color Gamut. While manufacturers can-and do-use an expanded color space as a selling point, the fact remains that wider than standard color points distort all the colors produced by a set.
While this may be true, the more important consideration is whether LEDs can provide an accurate color gamut-one that conforms to the high-definition ATSC color space as closely as possible. One of the claims made for LEDs is a wider color gamut than more conventional light sources. Since LED lighting is the full-house technology in this particular Samsung set, we'll begin there. This Samsung, like its stable mates in the 87S series, employs LEDs as a light source rather than the usual projection lamp. But what is new here is the light source. DLP, of course, isn't particularly new in digital displays. Samsung's HL-T5687S ($2,599) employs DLP imaging, a technology not available to flat panels. But, more importantly, they are still cheaper, per inch of screen area, than flat panels.Īnd rear projection sets are coming up with their own, new, technical innovations. The new rear projection displays are far smaller, lighter and shallower, than the old CRT space hogs.
While the rear projection set has fallen on slow times on the sales floor, most manufacturers, including Samsung, make both flavors of one-piece video displays. Not to hang on the wall mind you-studies show that most buyers use them on a stand-but because they're, well, cool. Everyone, it seems, wants a flat panel television these days.
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