LCD Monitor – Are they the same?

In Electronic on 18 March, 2006 at 6:25 am

They seem the same, so are they the same?

Response time?  Sure some are 4ms, some 8ms and some 12ms.  But in actual fact these figures might not be measuring the same thing.  Response time refers to the speed of pixels, how fast can they change from color to color.  A faster response time will not cause a “ghost” effect to appear in games and movies.  However, nowadays, the panels are fast enough that you will hardly get any that will be that bad.  Furthermore, the response time measured might be from gray to gray or black to white, depending on which is the fastest.  Thus, on average most panels are really responding at the same speed.

Contrast?  Brightness?  For contrast, a 500:1 is normally good enough, which is the standard nowadays anyway.  Brightness is actually quite adequate for any LCD panel, normally it is above 250 cd/m2.

So are there really any difference?  Luckily, there are, if not they won’t be price so differently.  I think the current most important difference is the color depth.

Color depth refers to the number of colors the panel can produce.  Currently there are 6 bit and 8 bit panels.  8 bits panel are the so called true color panel as it can display a total of 16.7 million colors.  This is the best panel if you are interested in watching movies on your monitor, or even for future gaming that is of a high definition.  6 bit panel can only display a total of 0.262 million colors.  This is actually the same color depth as the latest mobile phone display.  However, monitor manufacturer use a technique call dithering to help to increase the color depth in 6 bit panel.  This technique display two close colors very fast so that only one is seen and thus fool the eyes into thinking that it can see more colors.  With dithering the perceive color depth becomes 16.2 million colors.

A panel that can produce a total of 16.7 million colors is still the best for watching movies and graphic designing.


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