Archived from groups: alt.tv.tech.hdtv (
More info?)
"Jack Dotson" <jdotson@stx.rr.com> wrote in message
news:NJ2xd.56635$yf.31807@fe2.texas.rr.com...
>
> "Leonard Caillouet" <no@no.com> wrote in message
> news:zr1xd.7426$jn.4425@lakeread06...
> >
> > "Jack Dotson" <jdotson@stx.rr.com> wrote in message
> > news:t_0xd.55865$yf.49413@fe2.texas.rr.com...
> >> True, I don't know why you keep seeing people say the LCD is going to
> >> have
> > a
> >> degraded picture, but not the DLP. I just don't get it. What is there
> >> to
> >> degrade other than the bulb?
> >
> > While I think that the reliability of LCD sets will be very good, The
DLP
> > system is simpler and should have a longer life, in terms of the DLP
chip
> > vs
> > the LCD panels. LCD is a transmissive technology, meaning that the
light
> > passes through the panel, while the DLP is reflective.
> >
> > The reason that you are seeing people say that LCD is going to have a
> > degraded pix is because over many years of application in projectors,
many
> > people have seen problems with LCD panels degrading. Many of these
> > problems
> > have to do with the application and the quality of the design. For
> > instance, when you go into bars and restaurants that have video
projectors
> > you will often see hazy images or splotches of color or faded yellowing
> > images. Some are just very dirty, some have bad panels due to heat
damage
> > from not being cleaned. Some just have bad panels because they do go
bad
> > sometimes. The most common failures are blue panels, which seem to be
> > more
> > sensitive to the UV from the lamps. Also, dirt and oil collecting on
the
> > panels = heat, heat increases the likelihood of failures. In home
> > applications many of these problems will be far less apparent and less
> > significant. Overall, however, the DLP system can tolerate much more
> > abuse
> > of this nature and the chip itself is quite durable.
> >
> > Both are quite good, but expect to see fewer and fewer LCD RPTVs over
the
> > next several years. Mostly, the DLP systems look better, and should be
> > more
> > reliable.
> >
> > Leonard
>
> Then why in the world would so many company's build LCD's if they know the
> DLP's are going to be much more reliable?
LCD is a well established technology that predates DLP by many years, DLP is
new and only one company, TI, builds the chips. Every major manufacturer
with any research capacity is working on technologies to replace LCD, and
the reflective technologies seem to be the future. I did not say that LCD
was much inferior to DLP, but there are advantages to the latter. LCD is
not a bad buying decision if you like the way it looks or see rainbowing in
the DLP. The fact is, however, that the problems with rainbowing are
minimal and much less than early designs, and LCD is rapidly becoming an
also-ran in performance at most price points.
Leonard