What is viewing angle? It's the angle framed on either side of the viewing course (or predisposition angle), where the differentiation of the display is still viewed as adequate. The expression 'viewing angle' is frequently utilized incorrectly with the expression 'viewing course' or 'inclination angle'... 

 LCD has a restricted viewing angle! They lose difference and get to be difficult to peruse at some viewing angles and they have more differentiation and are less demanding to peruse at others. The measure of the viewing angle is dictated by a few components, essentially the kind of Liquid Crystal Display fluid and the obligation cycle! Since the viewing angle has a tendency to be littler than a great many people would like, certain viewing bearing or inclination angle is outlined into the module at the time it is made! This implies the ostensible viewing angle is balanced from the perpendicular by some sum! A few forms of the LCD module are then offered with this predisposition set to distinctive angles or positions to suit however many applications as would be prudent! 
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     A STN character display running at an obligation cycle of 1/16 has a viewing angle of ±20 degrees and an inclination angle of 25 degrees!  For this illustration,  expect the display is a 12:00 (top) sort. At the point when the display is seen from 25 degrees over the vertical, it will have its most extreme complexity and best 'look'. On the off chance that the viewer moves his eye further over the display by an extra 30 degrees, he will see the display decrease interestingly. Moving the viewing position any further over the display will lessen its complexity to an unsatisfactory degree!

  Contrast Adjustment and Viewing Angle 

     Conforming the complexity voltage, VO, will impact the viewing bearing (predisposition angle) to some degree, however not the viewing angle. 12:00 display can be upgraded for a 6:00 viewing position by changing the differentiation voltage. A 12:00 display set for 6:00 viewing position won't have as extraordinary a complexity as an issue display set for 6:00 viewing position, and the other way around. Architects regularly need a display to be advanced for straight-on viewing. Either a 12: 00 or a 6: 00 module can be utilized; and the difference voltage can be balanced marginally to upgrade the display for that viewing position. In the case utilized over, the viewing angles of both the 6:00 and 12:00 modules really cover the perpendicular (or straight on) viewing position!--TEKSWO Display (Chimei Innolux TFT LCD Display Distributor)