CNET reader Ray asks:Will leaving my TV powered on (but on black screen) for an extended period of time do any damage or affect the picture quality?Good question.
Not all HD is the same. For that matter, just because you have an HDTV, that doesn't mean you're actually watching high-definition video. A variety of factors could be conspiring to create an image that's not nearly as good as what your TV is capable of.
Make sure you're getting the most from your TV with this guide.… Read more
The hard-drive activity LED on your computer's front panel flashes when your HDD is active. It blinks reassuringly when you think your system has frozen up -- or it did, when computer cases still had HDD LEDs. Fewer and fewer PCs display HDD LEDs, though most motherboards still support them. No need for hardware mods with Free HDD LED. This portable freeware monitors your HDDs, including SSDs, and displays disk activity in a desktop widget and system tray icon. It monitors SATA and IDE internal drives as well as USB drives, which means it's compatible with most drives, … Read more
LEDs, or "light-emitting diodes," have come a long way since they were introduced as red, green, and blue computer indicator lights.
These days, LEDs are available in endless shapes and sizes, a wide variety of colors and neutrals, and offer many benefits over traditional incandescent lights.
For starters, LEDs can potentially cut energy usage by 25% in the U.S. How? Here's the science, made simple: incandescent bulbs convert most electricity to heat, whereas LED lights convert most of the energy into light. That's why LEDs don't give off heat the way traditional … Read more
Philips on Sunday will start selling an LED bulb that sets a new bar for performance -- and price.
The company will release the Philips L Prize LED on Earth Day for $50, which includes an "automatic incentive" from the company. The general-lighting bulb came out of the Department of Energy's L Prize competition to develop long-lasting, efficient, and less expensive LED lamps.
Philips claims its L Prize LED is the most efficient 60-watt LED equivalent and improves on features from Philips own existing LEDs.
It gives off 940 lumens, consumes 9.7 watts, and has a … Read more
When should you upgrade your TV? Every year sees new models that are bigger, better, with more features and lower pries. When is that point were the performance difference of a new TV is worth the hassle and the cost?
To find out, we have to take a look at how much better the current models are compare to what you have.
So let's take a look.… Read more
Cree is leaning on high design to get LED lighting onto lamp posts.
The company today introduced new lines of streetlights that use long-lasting and energy-efficient LEDs, including AeroBlades lamps which are an array of LED light sources in blade-like strips.
Cree also updated its traditional LED streetlights for overhead lighting and developed a lamp with traditional bulb designed to fit into historic districts.
The products are the first since Cree, which makes LED light sources, purchased Ruud Lighting to expand its lighting fixture business. LEDs are a good fit for street lights in that they last longer than other … Read more
By doubling the number of LEDs in the new iPad, Apple cut somewhat into battery life--particularly when used at full brightness--something you won't find on Apple's tech spec page.
Though the new iPad's battery is 1.7 times larger than the iPad 2's, all of those extra LEDs still take a toll on battery life at full brightness--as Raymond Soneira, president of DisplayMate Technologies, told CNET in a phone interview yesterday.
"The [power consumption of the] LEDs is 2.5X compared to the iPad 2, and the battery is 1.7X [larger]...so what happens … Read more
Reported heat issues with new iPad are most likely due to a combination of more backlights and more power needed to drive the backlights, an expert told CNET. This follows a CNET report attributing extra heat to the new iPad's A5X chip, also.
Apple has doubled the number of LEDs in the new iPad to achieve the same brightness as the iPad 2, driving up power requirements and therefore heat, Raymond Soneira, president of DisplayMate Technologies, said in a phone interview today.
"The LED power at maximum brightness is 2.5 times that of the iPad 2," … Read more
Finnair business travelers flying between Helsinki and Shanghai will soon have the chance to be test subjects on the effect that "brain stimulation" headphones have on jet lag.
The $240 earbuds, made and tested by Finnish company Valkee, already blast LED lights instead of music into desperate and willing ear canals with the intention of alleviating seasonal affective disorder. (The company has claimed, too, that the light helps improve reaction time--at least in Finnish hockey players.)
Now Valkee is working with the airline Finnair to determine whether the lights may instill a sense of well-being in long-distance … Read more