---
title: Analog TFT calibration
layout: default
created: 2009-05-12 14:19:22 +0200
updated: 2009-05-12 14:19:22 +0200
toc: false
tags:
  - know-how
  - hardware
  - tft
  - calibration
---
If you have connected your TFT via an analog VGA cable, you might have some blurry vision or even flickering
in some cases. If the following picture shows some flickering or looks blurry, your display needs calibration.

![XOR pattern]({{ site.url }}/assets/xor_pattern_small.png)

To calibrate your display, go to [Randy Simons' page](http://randysimons.com/pagina_131_NL.xhtml) and do the following:

  - open the [sync pattern page](http://randysimons.com/overige/tftAutoAlignPattern/)
  - put your browser in full-screen mode (mostly by pressing <kbd>F11</kbd>)
  - issue the auto-calibration on your TFT display (most displays have a specific *"Auto"* button)
  - make sure the picture doesn't flicker anymore
  - exit full-screen mode (<kbd>F11</kbd> again)