From VDR Wiki
Displays are mostly used to display channel informations, as are shown on the shortly on the OSD after channel switching.
There are basically three display types
|Type||Remark||Needed VDR plugin||Bild|
|Alphanumeric LC-Displays||Letter and digits only||LCDproc||Display with 20x4 characters|
|Graphic LC-Displays||black and white only||GraphLCD||Display mit 240x128 Pixeln|
|Colored TFT-Displays||Plugin in early beta state||GraphTFT|
The graphic LC-Displays are relatively expensive. Therefor some people uses the PSone LCD for purposes other than intended.
LCDs are working on the basis of liquid crytals in contrast to VFDs (Vacuum Fluorescent Display) which are working with fluorescent gases and have a greater contrast.