LCD Contrast
  It is necessary to consider the application when designing a LCD. How will it be used? Will the end user be sitting or standing?

If the LCD is to be viewed from above (12 o'clock), a top view display will be required. If from below (6 o'clock),
then a bottom view LCD is the proper choice but not with AMP DISPLAY LCD products which are equally
viewable from 6 - 12 o'clock thanks to our proprietary technology. Viewing angle is a function of cell spacing,
which is the gap between the two glass plates that make up all LCD's. Standard TN displays are usually
configured with cell gaps of 6 to 8 microns, which results in a 2ND MINIMA LCD. A 5 to 6 micron cell gap
results in a 1ST MINIMA display, which will produce a viewing angle of 175º. A collateral benefit of reduced cell
gaps is a speedier response time.


Contrast

Is a function of the following:

 1. Ambient lighting condition
 2. Polarizer type
 3. Fluid type
 4. Multiplex ratio.
 5. RMS voltage. The higher the voltage, the higher the contrast.


The portions of the LCD that are turned on and off to produce images are called SEGMENTS. During the manufacturing process, indium tin oxide is etched away on the glass substrate. There are a variety of image
types:

1. 7 segment
2. 14 segment
3. 5x7 dot matrix
4. 5x8 dot matrix
5. Pixels or dots - graphic LCD's
6. Annunciators (or symbols)




 
Technology