DLP's and burn in

Archived from groups: alt.tv.tech.hdtv (More info?)

"jep" <a@b.c> wrote in message
news:g73u709cfvt0jltdqfp81vogpbhclmfmkn@4ax.com...
> I recently got a Samsung HLN617W DLP, and I have heard mixed reports
> about burn in... Can DLP televisions experience burn-in?

none
DLP is the technology least affected by still images

eventually though the lamp will "burn out" though just the sheer number of
hours on it, but they can be replaced

Archived from groups: alt.tv.tech.hdtv (More info?)

The primary advantage of DLP technology is that it doesn't not burn
phospher to produce an image, so it should last you a lot longer and
you have zero risk of burn-in.

-Jeremy


jep <a@b.c> wrote in message news:<g73u709cfvt0jltdqfp81vogpbhclmfmkn@4ax.com>...
> I recently got a Samsung HLN617W DLP, and I have heard mixed reports
> about burn in... Can DLP televisions experience burn-in?

Archived from groups: alt.tv.tech.hdtv (More info?)

"LarryLOOK" <anonlmp@yahoo.com> wrote in message
news:TL6dnU6n2bxDVx_dRVn-jg@comcast.com...
>
> "Randy Sweeney" <rsweeney1@comcast.net> wrote in message
> news:rbCdnZ-CPaf1suLdRVn-tA@comcast.com...
> >
> > "jep" <a@b.c> wrote in message
> > news:g73u709cfvt0jltdqfp81vogpbhclmfmkn@4ax.com...
> > > I recently got a Samsung HLN617W DLP, and I have heard mixed reports
> > > about burn in... Can DLP televisions experience burn-in?
> >
> > none
> > DLP is the technology least affected by still images
> >
> > eventually though the lamp will "burn out" though just the sheer number
of
> > hours on it, but they can be replaced
>
> My DLP lamp burned out in the 1st year (but not a big problem since I'm
> covered by the 3 yr plan). My kids use playstation endlessly - so if
there
> was a way to produce burn in they would have done it already.

Wow... you gotta have a TV on over 12 hours a day to eat through the bulb's
5000 hour life in one year

You must be really glad you didn't buy a phosphor based display!

Archived from groups: alt.tv.tech.hdtv (More info?)

"GGA" <crpediem@ptdprolog.net> wrote in message
news:GD2dncUL0OColB7dUSdV9g@ptd.net...
> Just because the bulb has a life expectancy of 5,000 hours doesn't mean it
> will last 5,000 hours.

Actually it should in this case.

HID bulbs have a very well understood aging / failure mechanism - simple
erosion of the electrodes by the arc and thus increasing operating voltage
over time.

In a properly designed system, they really should last 5000 hours with a
relatively low standard deviation of failures.

Archived from groups: alt.tv.tech.hdtv (More info?)

"Leonard Caillouet" <lcaillonospam@devoynet.com> wrote in message
news:YWFgc.26070$XP2.10452@lakeread06...
>
> "Randy Sweeney" <rsweeney1@comcast.net> wrote in message
> news:taednaB-bqMVvR7d4p2dnA@comcast.com...
> >
> > "GGA" <crpediem@ptdprolog.net> wrote in message
> > news:GD2dncUL0OColB7dUSdV9g@ptd.net...
> > > Just because the bulb has a life expectancy of 5,000 hours doesn't
mean
> it
> > > will last 5,000 hours.
> >
> > Actually it should in this case.
> >
> > HID bulbs have a very well understood aging / failure mechanism - simple
> > erosion of the electrodes by the arc and thus increasing operating
voltage
> > over time.
> >
> > In a properly designed system, they really should last 5000 hours with a
> > relatively low standard deviation of failures.
>
> Look again at the OEM ratings for HID lamps. Few are rated as high as
5000
> hours.
>
> So far, from what I have seen, the variance seems pretty high. We see
lots
> of lamps that don't make the rating that the maker of the set chooses to
> claim. The only LCD or DLP maker that I have seen so far that has had
lamp
> life that consistently exceeds their rating is Yamaha. What are they
doing
> differently? Well, nothing, except they looked at the numbers and choose
to
> rate their lamp life very conservatively. They sell lamps that the OEM
> rates as high as 2500 hours and rate them for 1000.
>
> HID lamps are like any other component and have variances in
manufacturing,
> application engineering, and user habits that lead to wide variations in
> life. Of all the lamps that I have replaced, I can think of only a
handfull
> of sets that came in with filters that looked like they had EVER been
> changed or cleaned.
>
> Leonard


I would speculate that the TV makers are skimping on the power supply -
either that or they are overdriving (or undersizing the bulb!) and eroding
the electrodes prematurely. I can understand this. A decent closed loop
inverter supply for HID's is expensive to build and TV guys have a cheap
streak a mile wide.