$20 for iPhone Back Glass Repair at Nation Wireless ($40 Value)

Hot Springs

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In a Nutshell

certified cellular tech Trevor Nation breathes new life into iPhones with skillful back glass repair

The Fine Print

Promotional value expires 90 days after purchase. Amount paid never expires. Limit 1 per person, may buy 2 additional as gifts. Must use promotion value in 1 visit. Valid for Back Glass replacement for IPhone model 4 or 4S only. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Without modern electronics, mankind would have limited access to Bach's symphonies, Hitchcock's films, and Bob Saget's dog and baby voiceovers. Stock up on entertaining appliances with this Groupon.

The Deal

  • $20 for one iPhone 4/4S back glass replacement ($40 value)

Liquid Crystals and LCDs: How Cell Phones Resemble Carrots

A smartphone's tiny screen relies on the strange properties of liquid crystals. Check out Groupon's study of LCDs to learn how they create the vivid pictures in your pocket.

The term liquid crystal seems a contradiction, but a liquid crystal is actually neither a liquid nor a solid—it's both, stuck in a sort of chemical limbo with its molecules somewhere between the liquid and solid phases. When an electrical current passes through a liquid crystal, its molecular orientation changes, and so does the direction of light that passes through it. By sandwiching these crystals between polarized glass and manipulating the current passing through them, your phone is able to control the light they channel, resulting in the high-contrast images that appear on screen. Although our brains only see each pixel as a single dot, each consists of red, blue, and green subpixels that, when lit at various intensities, can emit more than 16 million colors.

Despite their advanced applications, liquid crystals are not a recent discovery. They were first identified in the late 19th century by a scientist studying cholesterol extracted from carrots—a natural source of liquid crystals, as are human beings and most other living things, which tend to have them in their cell membranes. Liquid crystals and LCDs were the subject of research and patent applications throughout the early 20th century—including one filed by Marconi’s Wireless Telegraph Company in 1936—and finally hit consumer electronics in the early 1970s, when they were introduced in wristwatches.

Customer Reviews

Very quick and efficient service.
Jeri E. · January 2, 2012
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    Hot Springs

    3107 Albert Pike Rd.

    Hot Springs, AR 71913

    +15017817401

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High-tech products and accessories, from smartphones to laptop cases
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