LCDs follow a different set of rules than CRT displays offering advantages in terms of bulk, power consumption and flicker, as well as "perfect" geometry. They have the disadvantage of a much higher price, a poorer viewing angle and less accurate colour performance. While CRTs are … [Read more...]
LCD Light Polarisation
LCD is described as a transmissive technology because the display works by letting varying amounts of a fixed-intensity white backlight through an active filter. The red, green and blue elements of a pixel are achieved through simple filtering of the white light. Most liquid crystals … [Read more...]
Creating Colour in LCD Displays
In order to create the shades required for a full-colour display, there have to be some intermediate levels of brightness between all-light and no-light passing through. The varying levels of brightness required to create a full-colour display is achieved by changing the strength of the … [Read more...]
DSTN LCD monitors
A normal passive matrix LCD comprises a number of layers. The first is a sheet of glass coated with metal oxide. The material used is highly transparent material so as not to interfere with the quality of the image's integrity. This operates as a grid of row and column … [Read more...]
Digital Flat Panels
An important difference between CRT monitors and LCD panels is that the former require an analogue signal to produce a picture and the latter require a digital signal. This fact makes the setup of an LCD panel's position, clock and phase … [Read more...]
FED Flat Panels
Some believe FED (field emission display) technology will be the biggest threat to LCD's dominance in the panel display arena. FEDs capitalise on the well-established cathode-anode-phosphor technology built into full-sized CRTs using this in … [Read more...]
Flat Panel Feature Comparisons
The table below provides a feature comparison between a 13.5in passive matrix LCD (PMLCD) and active matrix LCD (AMLCD) and a 15in CRT monitor: Display Type Viewing Angle Contrast Ratio Response Speed Brightness Power … [Read more...]
HAD Flat Panels
All of the displays discussed hitherto - whether they're made of liquid crystal, phosphors or plastic - have one thing in common; they're two-dimensional. However, British start up Reality Vision is in discussion with a number of foreign … [Read more...]
IPS – In-Plane Switching LCD Monitors
In-Plane Switching (IPS) was one of the first refinements to produce significant gains in the light-transmissive characteristics of TFT panels. Jointly developed by Hosiden and NEC, it is a technology that addresses the two main issues of a standard twisted nematic (TN) TFT … [Read more...]
LCD – Liquid Crystal Displays
Liquid crystals were first discovered in the late 19th century by the Austrian botanist, Friedrich Reinitzer, and the term liquid crystal itself was coined shortly afterwards by German physicist, Otto Lehmann. Liquid crystals are almost transparent substances, exhibiting the … [Read more...]
