This is an app note.
The LCD is already lit with a backlight but it is about how the LCD manipulates the light.Description: This application note provides an introduction to the basics of LCD: its construction, physics behind its operation, and the different factors affecting its properties and performance.
Keywords: PIC18F97J94, PIC18F8XJ90, PIC18F6XJ90, PIC18F8XK90, PIC18F6XK90, PIC18F8X90, PIC18F6X90, PIC16(L)F1946/47, PIC16(L)F1938, PIC16(L)F1939, PIC16LF1906, PIC16LF1904/7, PIC16F913/916, PIC16F914/917, PIC16F946, PIC18F97J94 Plug-in Module, PIC16F917 Plug-in Module, LCD Explorer Demo Board, PICDEM LCD 2 Demo Board
http://www.microchip.com//wwwAppNotes/A ... e=en011075