$20 for Installation of Temper Proof Glass Screen Protectors at Angels Repair Center ($40 value)

Multiple Locations

Value Discount You Save
$40 50% $20
Give as a Gift
Limited quantity available
1 bought

In a Nutshell

Technicians apply screen protectors to smartphones to prevent scratches

The Fine Print

Promotional value expires 180 days after purchase. Amount paid never expires. May be repurchased every 180 days. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price). Limit 1 per person, may buy 1 additional as gift. Must use promotional value in 1 visit. Valid only for option purchased. Valid only for iPhone 4, 4s, 5, 5c, 5s, 6, 6 Plus, Galaxy s3, s4, s5, and Note 4. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

The Deal

  • $20 for installation of temper proof glass screen protectors ($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

The staff was amazing I purchased this groupon and the same day I was able to get my iPad repaired They were so great that I decided to have them switch my phone protector as well I highly recommend this place It is a steal for this price Thank you for having this offer available
Kylian G. · December 16, 2015
Best service Fast and reliable ! Clean
Richard S. · December 14, 2015
Just picked it up So far so good
Arlene S. · October 21, 2015
Merchant Location Map
  1. 1

    Angels Repair Center

    1167 Deer Park Avenue

    North Babylon, NY 11703

    +16318555555

    Get Directions
  2. 2

    Angels Repair Center

    32 1st Ave

    Brentwood, NY 11717

    +16312456902

    Get Directions

High-tech products and accessories, from smartphones to laptop cases
15% Bonus Savings
Get an extra 15% off local restaurants, spas, salons, and more to use within 48 hours of your Goods order! See details
By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.
{}