Called Paperwhite, the new model has a black and white screen and comes with a light source which enables reading in a dark environment.
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Utilizing a light bulb as the light source, the light is reflected from a small DMD to the screen.
But while it lasted, work was a wellspring, a real source of light, the nurture of a beloved community.
The key advantage for OLED is that the panel itself emits light, eliminating the need for a light source behind it and keeping the overall structure very thin and light.
Although the exact mechanism is still not entirely understood, it turns out that illuminating the liquid crystal, applying a voltage across a small region of it, and then turning off the light source causes a small amount of charge to be stored in that region.
While LCD screens need a backlight to illuminate their crystals, OLED does not need a separate light source.
Looking at the Nook for a second, you can immediately isolate the top as the light source, with a stronger concentration and somewhat even distribution.
But, like the Nook, the light source creates a problem: blossoms of LED light appear at the bottom of the screen.
At one end of the tube is a source of ultraviolet light and at the other a detector.
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More than just supplying a battery-free source of light, though, the lantern can function as a charger, thanks to a USB port built into the casing.
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Capturing great audio with an external microphone and adding a light source to improve the picture are all important too.
Methods are already being developed to implant a light source inside the body which could be activated by remote control.
Over the past decade, they have become much more widely used as a light source as they are both bright and efficient.
In the top diagram the solar panel is completely exposed to a light source 1804 and all six electrode quadrants 1802 are producing electricity more or less equally.
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The advantage of the rival NTT technique, says Saruwatari Masatoshi, a senior researcher at the company's Optical Network Systems Laboratories, is that it uses only a single light source.
Until now, the existence of such a device -- which works by splitting light in a way that points to its source -- has only been hinted at in fleeting literary mentions.
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LatticePower, started by a physicist with skills and experience honed in China, is a good example of this new trend with its breakthrough technology for making a highly efficient source of light.
When combined with a suitable light source and projection optics, the array of mirrors can project an image.
Thanks to an energy saving LED light source, the light-weight presenters offer a long battery life of up to 80 minutes.
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Junior Seau was a source of light and life until injuries from football snuffed that out.
Users can simply mount the entire flashlight and charger as a unit by doorways and entryways to hazardous locations, thus providing a highly convenient and fully charged portable light source whenever it is needed.
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The glasses are equipped with a near-infrared light source, which confuses the software without affecting vision.
Because the universe is expanding, any wave of light emitted from a far-flung source is stretched out.
The light source is polarized by a Polarized Beam Splitter and reflects off of each of the chips.
Still, Light Reading reports that "a source whose familiar with those discussions" says Google is pushing the service hard to all cable TV operators.
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And since ultrasound travels in a tight line akin to laser light, the emergent tones are audible only in a narrow, cylindrical path from source to ear.
It catches even the dimmest light source and reflects it back with a bright flash.
They taught the rats to choose the active light source by poking their noses into a port to receive a sip of water as a reward.
You still have a light bulb or lamp as your picture source, but that's the essence of the similarities.
Robert noted with interest that there is abundant natural light from dawn to dusk that might provide a renewable source of electrical power.
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