led tv keeps dimming
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FSPT_Tech
I want to buy an 40" - 46" HDTV (1080p) for my home to replace my 10 year old 40 " CRT TV. I've seen different types out there: Plasma, LED. LCD. What's the difference and which is considered best (quality-wise). Any references to links that explain the different types of TVs on the market now. I'm just now able to afford getting into 21st century technology and would like some help.
Answer
Confused about what type of TV to buy? LED LCD Plasma.. How to choose?
After all, there are so many acronyms and buzzwords to wrap your head around, such as 1080p, 120/240Hz, 24p, HDMI and LED backlighting. Huh?
Along with deciding how big a screen you want (which is usually tied to the size of your budget and the dimensions of your room), the next choice should be between LCD.LCD (LED Backlit) or Plasma â and all have their merits. Here, we'll describe each of these formats, and also point out their shortcomings.
LCD
What is it?
lcd tv 120mhzSimilar to your laptop computer's monitor, flat-panel LCD televisions use a liquid crystal display to produce a sharp and bright picture; these crystals are sandwiched between two panes of polarized glass, which are stimulated by an electric current and illuminated by fluorescent tubes housed behind the glass. Some newer LCD TVs, however, use LED-backlighting instead. LEDs, or light-emitting diodes, translate to a better-looking picture (see photo).
Pros
There are a number of advantages to buying a LCD televisions. For one, with more than three-quarters of all televisions embracing this technology, there is a lot of choice when it comes to manufacturers, models and sizes (13- to 103-inches, in fact). Competition, of course, breeds more aggressive pricing, too, which is good news for the consumer.
Flat-panel LCD televisions are also very thin, light and energy efficient, and are ideal for rooms with plenty of ambient light, which, for example, comes through large windows as they tend to absorb rather than reflect light (reflected light can obscure your view of the screen).
Cons
Until recently, LCD TVs didn't handle fast motion images as well as plasma TVs, resulting in a somewhat blurred image. Newer LCD TVs, though, have added technologies such as 120Hz frame doubling (or 240Hz frame quadrupling) to smooth out motion. It's still not as good as plasma, but much better than before. Also, LCD TVs used to have problems showing dark blacks (because a light was still on behind the pixel showing black, resulting in a more greyish hue). Many LCD televisions today use local-dimming with LED-backlighting (see next section) for improved contrast ratios (whiter whites and blacker blacks) - but, keep in mind, this is not an issue associated with plasma TVs.
http://www.price-rank.com/search/lcd%20tv
LCD (LED Backlit)
What is it? Not a Different Type of TV
led lcd tv backlighting backlitItâs tempting to think LEDs belong in a completely separate category beside LCD and plasma TVs, but in reality, an LED television is just a type of LCD TV. The proper term would really be "LED-backlit LCD TV," but that always seems to get truncated to "LED TV" in everyday conversation, perpetuating the confusion.
To understand how LEDs function in an LCD TV, think of an actual liquid-crystal panel as the plastic pegs in a Lite Brite. They hold a translucent image, but without a powerful backlight to punch through and light it up like a signboard, youâre not going to see much. On your old Lite Bright, an inefficient incandescent light did the job, but pretty unevenly. On a typical LCD TV, fluorescent lights provide the backlighting through a special plastic sheet called a light guide that distributes light from a fluorescent tube evenly over the surface of the TV. On an LED-backlit TV, fluorescent tubes are replaced with light-emitting diodes â LEDs â the same technology that probably lights up your digital watch, the buttons on your monitor, and the indicators on your stereo. They can be either situated along the edges of the TV like a fluorescent tube, or arranged directly behind the screen in a grid. But what difference does it make, and why would anyone spend so much money on it?
The Benefit of LEDs
The most obvious reason LEDs have fallen into favor in LCD TVs: theyâre simply more efficient. Although fluorescent lights do a decent job converting electricity to light in the big scale of things, LEDs perform even better. Typically, manufacturers claim an efficiency improvement of up to 30 percent over fluorescent-based sets, which can add up significantly over the lifetime of a TV, especially on larger screens that use more juice to begin with.
LEDs are also much smaller than tubes, even after accounting for the number of them needed to light an entire TV. That means LED-backlit televisions can be manufactured significantly thinner than their tube cousins. For instance, most of the ultra-thin televisions that measured under an inch thick at CES used LED backlights, because they add very little depth to the profile. Though commercial variants arenât quite as dramatically thin as these prototypes, theyâre significantly skinnier than their fluorescent-backlit counterparts, making them some of the most chic and living-room-friendly HDTVs out there.
For home theater enthusiasts, LEDs only matter for one reason: image quality. Because fluorescent tubes mu
How to sleep in a time where you are not used to?
Seju.
so when our 3 week christmas vacation came, i always sleep at 12 am and wake up at 10 or 11. now i developed this habit for 3 weeks and i got used to it. so that there is classes now, ihave to sleep 7 to 8 pm and wake at 4 am, but i cant!! i still have to wait for 12 am for me to get sleepy!! WHAT CAN I DO? AND I DONT WANT SLEEPING PILLS TOO!
Answer
this is something that you can do... but you WON'T. 2 hours before you want to go to sleep, shut off all light producing electronics, including the tv, computer, wii, phones, etc. the reason for this is that your brain needs to be quieted so it can gear down. what is there to do if you do all that???? why... read and study, what else?
http://www.wikihow.com/Sleep-Better
"Keep the room dark. Exposure to light during the time you're supposed to be sleeping can disrupt your body's internal cycles. This has been documented in studies surrounding circadian rhythms.[3] Turn your light off, or use a very dim night light. Pull curtains across, blinds down or shut the shutters, to prevent outdoor lights from shining on you. If you wake up and see any kind of bright light, you'll have a much harder time falling back asleep. Try to eliminate all sources of light, including windows, LED clocks, computer lights and cable boxes; by covering them with heavy paper, cloth covers or blue tack."
i am absolutely positive you will NOT do this. you're just too wired to let go.
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