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VA – Vertically Aligned LCD Monitors

In late 1996, Fujitsu unveiled a TFT-LCD panel that used a new type of liquid crystal (LC) material that is naturally horizontal and has the same effect as IPS, but without the need for the extra transistors. Fujitsu used this material (which was developed by Merck of Germany) for its displays from mid-1997 onwards.

In the vertically-aligned (VA) system, the LC molecules are aligned perpendicular to the substrates when no voltage is applied, thus producing a black image. When a voltage is applied, the molecules shift to a horizontal position, producing a white image. With no voltage, all the LC molecules, including those at the boundaries with the substrates, are completely perpendicular. In this state the polarised light passes through the cell without interruption from the LC molecules and is blocked by the front polarise. Because the blockage is complete, the quality of black produced in this way is excellent and the viewer sees this black from all viewing angles.

As well as an excellent viewing angle of 140 degrees all round, these VA panels can achieve faster response speeds because there is no twisted structure and the LC molecules are simply switched between the vertical and horizontal alignments. They’re also capable of maximum contrast ratios of the order of 300:1, with no power penalty.

  • VA – Vertically Aligned LCD Monitors
  • What in the LCD is IPS!?
  • ThinCRT Flat Panels
  • TFT LCD Monitors
  • LCD Resolutions and Picture Scaling
  • Liquid Crystal Light Polarisation in LCD Monitors
  • Polysilicon Flat Panels
  • Plasma Flat Panels
  • PALCD Flat Panels
  • OLED Flat Panels
  • MVA – Multi-domain Vertical Alignment in LCD Monitors
  • LEP Flat Panels
  • LED Flat Panels
  • LCD – Liquid Crystal Displays
  • IPS – In-Plane Switching LCD Monitors
  • HAD Flat Panels
  • Flat Panel Feature Comparisons
  • FED Flat Panels
  • Digital Flat Panels
  • DSTN LCD monitors
  • Creating Colour in LCD Displays
  • Flat Panel ALiS Technology

Filed Under: Flat Panel Displays

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