Now a days almost all the mcu projects use a normal 16x2 char LCD or the LED to display the data, but the problem with those 16x2 LCD and LED is , they consumes a lot of power , they are very thick , bulky and the font size is really very small , and if you go for a big font size then they are really very expensive and some times we just don't want that may lines and character , what we want is just a 3 - 4 digit numbers and a big display font size.
so here is a quick tutorial on how to use a microchip pic mcu to drive an 4 common 7 segment lcd .
TYPES OF SEGMENTED(controller les "RAW") LCD
These type of LCD have no controllers built in all they are is just a liquid crystals sandwiched between to pieces of glass and sometimes a reflective plate at the back. The LCD who have that plate on the back (like my LCD has) called reflective and the LCD who don't have those plate looks quite a transparent called Transreflective.
There is another criteria for classification of the raw lcd glasses
Non Multiplexed (single Common) ( STATIC )