Directory: Obsessable table of contents

Join Obsessable Sign In
advertisement

LCD

LCD, or liquid crystal display, is a thin, flat display used in computer monitors, televisions, digital cameras and other consumer electronic devices. Originally invented at the end of the 19th century and developed extensively over the last 30 years, LCD technology works by passing an electrical current through a liquid crystal material sandwiched between two pieces of polarized glass or "substrate." Molecules in the liquid crystal solution respond to the electrical current by aligning in such a way that they allow only specific levels of light from a backlight passing through the first substrate to continue onwards to the second subtrate, creating the images and colors seen on the display panel.

Often used in battery-powered electronics due to relatively low power consumption, LCD panels contain one of two types of matrices that determine the state of pixels on the display: active matrix or passive matrix. Passive matrix LCDs are cheaper to manufacture but have slower response time and tend to produce fuzzy, lacking in contrast images. Active matrix LCDs use thin-film transistors or TFTs to store the electrical state of each pixel while other pixels are being updated. Active matrix LCD displays tend to provide a brighter, sharper image than passice matrix LCDs at the same size, as well as providing wider viewing angles.

The main features to consider when purchasing an LCD monitor or TV

  • resolution
  • response time
  • viewable size (length of the display along its diagonal)
  • matrix type (passive or active)
  • viewing angle
  • brightness
  • contrast ratio
  • input ports

 

Technology news All News

All News

MarketPlace