Hash Trends of LCD vs LED Technologies

There’s no shortage of confusion in the television market as new technologies emerge. A prime example of this is the presence of two related yet different technologies in LCD and LED-based LCD high-definition televisions. Most older and currently less expensive displays use cold cathode fluorescent lighting, or CCFL. Newer and higher-end displays use light-emitting diodes, or LEDs. Added to this confusion is the fact that LED technology has two sub-genres: locally-dimmed and edge-lit. Although the core liquid crystal-based technology remains the same, the difference in the way the on-screen images are illuminated often results in considerable performance and price differences.

Shared Technology

Liquid crystal displays operate using a sandwich of technologies, all of which work together to form crisp images. A constrained layer of liquid crystal solution is applied between two layers of polarized glass. The liquid crystals inside the solution possess traits of both a solid and a liquid, and respond to magnetic fields. These fields are applied by the electrical current running through the solution, causing the crystals to twist and untwist to varying degrees. The amount of twisting is proportional to the amount of light emitted. This light passes through three primary color filters and on to the video processor, resulting in a beautiful HD image. Both traditional LCD and LED-based LCD panels perform these essential functions.

Traditional CCFL Backlighting

Cold cathode fluorescent lighting or CCFL bulbs comprise the majority of backlighting on computer and laptop monitors as well as televisions. This is a bright and relatively energy-efficient lighting type, bettered only by LED LCD displays. However, it does often create uneven black levels and relies upon the degree of twist in the LCD layer of the display to create a true black. This commonly results in black areas depicted as a dark gray, which limits color accuracy. CCFL-enabled LCDs are normally less expensive than LED-based LCDs as one would expect given the maturity of the format and inherent performance limitations.

Locally-Dimmed LED Panels

Black on a television display ideally represents the total lack of color or light. Locally-dimmed LCD LED displays create black by turning off the relevant diodes on the display, creating a total absence of light in the areas directed by the set’s video processor. The extreme difference between light and dark areas of an LED display create wide contrast ratios, a key metric used to differentiate modern displays. LED-based LCD sets often have contrast ratios in the millions-to-one range, meaning black images of space and black suits are truly black. Since color accuracy is an offshoot of contrast ratio, high-contrast displays are more likely to offer rich natural hues. The only drawback to this display type is the visibility of light “blooming” around bright objects, but this is typically offset through proper calibration.

Edge-Lit LEDs

The most common LED panel offers edge lighting. This type of display arranges its LEDs along the perimeter of the screen, using various optical tricks to evenly spread light throughout the screen. However, this technique often results in the edge of the display appearing brighter, becoming progressively dimmer as you look toward the center of the screen. As manufacturers move away from CCFL lighting on their smaller, budget-oriented displays, edge-lit LEDs without local dimming will increase in prevalence.

ARTICLES

How to Reset Apple iPhone Factory Settings An Apple ID is a digital credential that belongs to an Apple customer. Apple IDs are used for identification purposes, and allow users to quickly purc...
How to make aware children sleep in their parent’s room skip When you first brought your baby home, you knew you'd have to struggle through a few months of sleep deprivation with your newborn. What you didn't kn...
China Unicom 24/7 Customer Service Phone Numbers Welcome to Sevenbucket.com It is the source of customers’ trust and .sharing reliable information about Company’s around the world. We provide all Com...
How To Measure The Values of Kid’s Games Activities Playing games with your kiddo is a gamble. He might throw a fit when he doesn't win. You might stack the deck so he can win to avoid the meltdown. Or ...
Making Halloween Picture Frames for Kids Skip Halloween is all about costumes and candy, friends and fun. Make Halloween-themed picture frames to display seasonal art, a poem or a snapshot of your...
How to Create Rules for Babysitting a Grandchild Grandparents: Nature's babysitters. If your children are lucky enough to have grandparents around, and those grandparents are willing to watch them, y...
How to Sharing Viral News of iPhone 4S Tricks and Features Apple's iPhone 4S smartphone, announced on October 11, 2011, includes many features not found in its look-alike predecessor, the iPhone 4. Its computi...
How Toddlers Feel Importance of Parents Blessing You find the earliest references of a parent blessing children in Genesis 9:26-27. Blessing your child expresses your acceptance and approval of her a...
How to Share Safe Insect Repellents for Toddlers As a parent, you naturally want to protect your toddler from the discomfort of insect bites. Seeing him scratch away at itchy mosquito bumps or cry in...
Electronic Arts Baton Rouge:24/7 Customer Support Number Sevenbucket .com will support Customer Care Support& Customer Support Technical Assistance & Customer Email Support Assistance like Telephone ...
How to Find A Sleep-Deprived Toddlers A sleep-deprived toddler is often whiny, uncooperative and prone to tears or tantrums. Making sure your tyke gets appropriate rest is important not on...
How Technology Turns Written Words Into Audio Transforming words that are written, typed or printed on paper into audible speech involves two distinct processes. First, Optical Character Recogniti...
How to Share Louisville Children’s Activities Preschoolers Louisville, Kentucky, offers a plethora of activities for preschoolers and toddlers -- and children of all ages and budgets of all sizes. Kids can get...
“Mary, Mary Quite Contrary” Activities for Preschoolers Skip "Mary, Mary Quite Contrary" is a popular nursery rhyme that has been engaging children for hundreds of years. The rhyme, with its images of silver bel...
How to Make Phonemic Awareness with Preschooler If your preschooler knows a few letters of the alphabet and is showing an interest in reading, the time is just right for introducing him to phonics. ...
How Toddlers Learn About Biology of Compost The beauty of composting is that it's a process that bridges the inanimate world with the animate. Composting takes dead organic material, such as law...
Lessons on Fine Motor Skills Skip in Preschooler While your preschooler probably mastered many skills without too much trouble -- running, climbing and jumping to name a few -- learning to write with...
Altera Customer Service Support Phone Number Are you looking for Altera customer service support phone number & Customer Email Support Assistance like Telephone Number  ,Mobile Number ,Toll f...
Is Day Care Linked to Aggression in Children? You have enough on your plate balancing work and family -- bringing home a terror from day care wasn't in the contract you signed when you enrolled yo...
How Toddlers Know Potty Training Begins and Ends How Toddlers Know Potty Training Begins and Ends You're likely eager for the day to come when you no longer have to deal with diapers. But potty t...
How To Make Incremental Learning Approach in Children When you home school your children, it's hard to know which style of curriculum you should buy. Some materials use a spiraling method of teaching that...
Alabama State Companies Customer Care Phone Numbers In this article focus about which are the companies in Alabama State located in united states.Capitical of Alabama is Montgomery and largest city is B...
How to Face Raising Closely Spaced Toddlers If the signature on your child’s birth certificate was barely dry before you got pregnant again, your children will be so closely spaced apart, they m...
HEB Texas Grocery Customer Relations Toll free Numbers Are you looking for  Customer Care Service &  Support Technical Assistance ,Customer Email Support Assistance like Telephone Number  ,Mobile Numbe...
How to Teaching a Toddler to Play Tee Ball If you have bright dreams of your 2-year-old becoming the next Major League all-star, you might want to consider starting early. While toddlers aren't...

Author: vijayanand