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Dot clock on an analog LCD

Discussion in 'Misc Electronics' started by Angus, Jul 19, 2005.

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  1. Angus

    Angus Guest

    Hi all

    I have a NEC LCD panel (NL10276AC24) and would like to drive it with
    signals from a standard graphics card (R, G, B, Vsync and Hsync).
    However the display also requires a pixel clock; although this would be
    possible to derive from the Vsync signal, would the display run without
    it?
    The datasheet (http://www.earthlcd.com/downloads/NEC 10276AC2402.pdf)
    does not really mention this in great detail, so presumably I will need
    the signal - does anyone have a schematic for deriving this clock, or
    is there a better way of driving the display?

    Thanks!

    Angus Thomson
     
  2. CWatters

    CWatters Guest

    The data sheet it clear you need it. That clock is telling the display when
    to sample the RGB inputs. see page 21 and onwards.

    I note that it also seems to be fussy about the order in which it's power
    rails come up.
     
  3. Angus

    Angus Guest

    Thanks for your help guys! Looks like I'll need to swot up on PLL's
    first. And there was me thinking it'd be easy!

    Cheers,
    Angus
     
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