Re: [OT?] Refresh rates for LCD screens?


Dave Martindale wrote:
> jg.campbell.ng@xxxxxxxxx writes:
>
> >My model for CRT displays has a display processor scanning through
> >image pixel memory cells in raster order and sending grey level values
[...]
>
> >What is an equivalent refresh model for LCD screens? Assume analogue --
> >though I might need an exact explanation of the difference between
> >analogue and digital in this context.
>
> In the case of LCD screens, there is local memory *in the LCD
> controller* to remember the state of every pixel in the screen.
> Because of this, there are two parts to "refreshing" an LCD screen:
> getting the data from the computer frame buffer (graphics card) to the
> LCD controller, and then driving the LCD panel itself.
>
> The first part of the process is done *as if* the LCD was a raster
[...]

Dave,

What a superb and comprehensive answer -- at least IMHO having dug out
bits of information in the period since I asked the question.

You may be aware of the uninformative drivel one finds about this
subject on the web; and I'm not aware of an up to date textbook that
covers the topic properly.
Oddly enough, after giving up on the wider web, I did find something
useful on uk.comp.os.linux.

Very many thanks. Very many hours saved for me; I'm writing notes for a
graphics course.

Best regards,

Jon C.

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