How to convert a Conventional CRT to LCD Display?

[Antonyb]

Hi,
For a conventional CRT electromagnetic deflection (X and Y coil) voltage is fed to the CRT and the necessary video is also fed as input.
By keeping the inputs as same, is there a solution to connect to the LCD display?:!: What kind of converter or what has to be done to make it compatible for the LCD display?:?:

 

[FvM]

You can buy a converter from RGB/Hsync/Vsync to digital LCD, I guess also for other video standards. Any LCD display
with an analog video input has the respective function built-in.

 

[Antonyb]

Dear FvM,
But how about a monochrome signal. Say for an old oscilloscope being replaced by a LCD display... for and LCD a VGA signal has to be generated. But how to generate a VGA from the analog X, Y and video voltage.

 

[Antonyb]

Hi all.
Does any know how to achieve this..?
A typical monochrome display with X, Y and Video signal to a LCD Display (with VGA)..?

 

[deepuj]

I have never done this. But the theory seems to be pretty simple. Assuming that the LCD controller chip has (x,y) and Amplitude input lines:

In a CRT display, X, Y and Video inputs are all analog. So it is evident that we will need to convert this to Digital to be used in an LCD display.

X and Y simply represent the position. So a simple high speed ADC should do the trick.

The video signal (to make it simple let us assume it is a monochromatic signal) represents the brightness of the pixel represented by the X and Y signals. So a digitally converted video signal can do the job for the pixel brightness as well.

You will need to decide the sampling speed of the ADC based on the video stream bandwidth.

Please note that the three signals should be highly synchronized (so keep the signal lines as similar as possible regarding physical dimensions).

Hope this helps.