[SI-LIST] : digital display interface

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From: sara.franci@esaote.com
Date: Thu Apr 13 2000 - 08:19:42 PDT


I?m interested about a digital transmission standard for connecting PC?s
graphic adapter directly to the LCD display without any AD conversion. I?ve
found more than one;in particular the principal are:

   DVI from DDWG (Digital Display Working Group)

   DFP from VESA (Video Electronics Standards Association)

   OpenLDI from National Semiconductor

So there isn?t a unique standard yet, but it seems that monitor manufacturer
have choosen DVI standard. In fact Philips and Nec have started to sell LCD
monitor with DVI input connectors.

One of the major difference between these standards is the technology used: both
DVI and DFP use TMDS (transition minimised differential signalling) a Silicon
Image component, while OpenLDI use LVDS (low voltage differential signalling)
from National semiconductors.

We use LVDS technology to drive LCD display trough a digital connection, but we
don?t have experienced in TMDS at all. Does anyone use these component? When is
it to prefer TMDS instead of LVDS?

Thanks.

Sara

ESAOTE S.p.A. Ing. Sara Franci
Research & Product Development Design Quality Control
Via di Caciolle,15 tel:+39.055.4229306
I- 50127 Florence fax:+39.055.4223305
e-mail: sara.franci@esaote.com

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