Do fixed pixel projectors convert interlaced to non-interlaced?

Discussion in 'Displays' started by Brian Dobbs, Jul 1, 2003.

  1. Brian Dobbs

    Brian Dobbs Ambassador

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    I can't seem to find information as to whether fixed pixel projectors such as LCDs or DLPs convert an interlaced signal to a non-interlaced signal by themselves. I would assume they do, but i have no proof.

    I have an LCD projector and I run an S-Video signal to it for the time being (until i get some component cables) When I get really close to the screen and look at static images (ex. DVD menus), I notice that the image 'shakes' (vertically I think) for lack of a better term. The 'shaking' is really apparent when looking at a horizontal line somewhere on the picture, which could even mean the border between the movie picture and the black border on top or bottom of the picture. I assume this tells me the picture is interlaced because isn't the 'shaking' eliminated when viewing a progressive scan signal?
     
  2. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    If it is interlaced, you will see scan lines. Simple as that.

    Every LCD and DLP projector I have seen will upconvert everything to progressive and fit its pixel array.

    Regards
     
  3. Brian Dobbs

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    I'm a little confused...

    If the projectors upconvert the signal to progressive, you'll still see scan lines? Are the scan lines what causes the shaking?
     
  4. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    Sometimes poor upconversion might be it ... but the image is still progressive.

    Regards
     
  5. Rick Guynn

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    Fixed-panel displays are progressive in nature, so they either deinterlace for themselves or must be fed an interlaced signal from an outside source. Some units do it better than others.

    RG
     

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