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Electronics => Beginners => Topic started by: coaxialgamer on May 18, 2018, 09:33:54 am

Title: Interfacing with an analog LCD screen and blanking
Post by: coaxialgamer on May 18, 2018, 09:33:54 am

Hello,
For a project of mine i need to generate a video display . I know how this works on CRT screens and i'm running the signal through VGA.

However , i thought about those older LCD screens that accept a vga input and that accept a regular analog signal . Being more compact , these displays are ideal for me.

My question is this : CRT's rely on blanking to move the beam around without drawing to the display . The extra time spent blanked is overscan.
But LCD's don't have a beam . what happens when a CRT would usually blank ? Does the LCD simply abstract it , or are any modifications required to the signal?

Title: Re: Interfacing with an analog LCD screen and blanking
Post by: bson on May 18, 2018, 12:27:26 pm

Panels of all kinds are still scanned and still have blanking intervals (porches).