LCD life

From: jpero_at_cgo.wave.ca <(jpero_at_cgo.wave.ca)>
Date: Sun Feb 15 17:10:24 1998

> On Sun, 15 Feb 1998 SUPRDAVE_at_aol.com wrote:
>
> > In a message dated 2/15/98 1:42:33 PM Eastern Standard Time,
> > higginbo_at_netpath.net writes:
> >
> > <<
> > I thought all the pixels that would go bad do so during the assembly
> > process. Do they go bad on their own over time?
> >
> > -John Higginbotham- >>
> >
> > yes, on lcd displays such as what IBM thinkpads use, individual pixels can go
> > bad. usually its not noticeable unless there is a solid colour on the screen
> > and then you can usually see it. i had a thinkpad once and had maybe one or
> > two burn out while i had it. like anything, they can go bad, but usually not
> > very many and almost never several at once.
>
> It sounds like you've got an active matrix (TFT) display. TFTs have one
> transistor per pixel, so you can see single points of failure like you've
> described. Other types of laptop displays (passive matrix LCD, gas
> plasma, and electroluminescent) address pixels by applying voltage at some
> (x,y) using a single x control and a single y control (OK, sometimes
> there are two or more independent panels to speed up the process). So, a
> failure will either result in an entire row of dead pixels, or somethimes
> an entire panel.
>
> -- Doug

Not always to TFT, I have a compaq SLT 386s/20 with a one dead pixel
stuck in off state, this is just simple LCD display. About
lamps, yeah, fluorsecent tubes or EL in anything do burn out from
age. But those tubes are easily replaceable in any case when you
KNOW where to get one. Simply by length, diameter and type of
coating.

But I would take TFT either mono or color any day.

:)

Jason D.
email: jpero_at_cgo.wave.ca
Pero, Jason D.
Received on Sun Feb 15 1998 - 17:10:24 GMT