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What You'll Get
Over time, cell phones have become man's best friend, much to the chagrin of dogs and Jeremy, who's known man since elementary school. Get a better connection with this Groupon.
$55 for iPhone Screen Replacement (Up to $110 Value)
- Valid for iPhone 4 and 4S models
- Expert service technicians
- Repairs are made onsite
A smartphone's 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.
Liquid Crystals and LCDs: How Cell Phones Resemble Carrots
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.
The Fine Print
Promotional value expires 180 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Limit 1 per visit. Valid only for option purchased. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.
About CPR Cell Phone Repair
CPR Cell Phone Repair brings gadgets back to life with a variety of services. Its deft team repairs phones suffering from maladies such as water damage, cracked screens, and charging issues. Gamers take solace in CPR’s ability to expertly handle the popularly named “ring of death” that can plague consoles. They also repair LCD screens for tablets and laptops. Customer can mail in their gadgets, drop them off at the store, or sit comfortably and wait while their devices are fixed.