Welcome to Bucaro TecHelp!

Bucaro TecHelp
HTTPS Encryption not required because no account numbers or
personal information is ever requested or accepted by this site

About Bucaro TecHelp About BTH User Agreement User Agreement Privacy Policy Privacy Site Map Site Map Contact Bucaro TecHelp Contact RSS News Feeds News Feeds

Anatomy of a Liquid Crystal Display (LCD)

Before about the year 2000, most desktop computers used cathode ray tube (CRT) monitors. Liquid crystal displays had been used on laptop computers since the mid 1980s. Color LCD displays have a sandwich-like structure as shown below.

Liquid crystal sandwich

One layer of the sandwich has liquid crystal between two glass plates. One glass plate has a matrix of thin film transistors on it. The liquid crystal layer is sandwiched between two polarizing filters, one polarizinglight vertically and the other polarizing light horizontally. Behind the sandwich-like structure is a fluorescent back light.

A pixel (picture element) is the smallest component of an image, creating a single dot in the picture. Each individual pixel is divided into three cells, or subpixels, which are colored red, green, and blue by the outer glass plate. To address a particular subpixel, its row is switched on, and then a charge is to the correct column.

Liquid crystals move depending upon the charge applied to a tiny capacitor by its related transistor. Each subpixel can be controlled independently to yield thousands of possible colors for each pixel.

More Computer Anatomy Articles:
• Understanding PC Data Buses
• Understanding The Speed Of New Pci Express Data Bus
• Basic PC Anatomy Inkjet Printers
• The Universal Serial Bus
• Understanding Your Motherboard
• How Hard Disks Work
• How Does Wireless Internet Work?
• CompTIA A+ Training Kit - Safety Issues
• PC Technician Street Smarts: A Real World Guide to CompTIA A+ Skills
• A Definitive Guide on How to Choose Your New PC

RSS Feed RSS Feed

Follow Stephen Bucaro Follow @Stephen Bucaro

Fire HD
[Site User Agreement] [Privacy Policy] [Site map] [Search This Site] [Contact Form]
Copyright©2001-2019 Bucaro TecHelp 13771 N Fountain Hills Blvd Suite 114-248 Fountain Hills, AZ 85268