[opendtv] Re: Reports from the Society for Information Display (SID) convention
- From: Jeroen Stessen <jeroen.stessen@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 1 Jun 2005 13:11:42 +0200
Hello,
Mark Schubin wrote in his 20050601 TTT:
> - Reports from the Society for Information Display (SID) convention:
I was there, all week.
> - Peter Putman says:
He presented a seminar about HDTV, which I could not attend.
> "(1) Samsung showed both their 82-inch LCD monitor (which had brightness
> uniformity/banding problems) and their 102-inch plasma (looked much
better).
True. Both were awesome, huge. The LCD output 600 nits white, the plasma
output 1000 peak (small area) but only 100 nits average (large area).
Both were 1920x1080p resolution.
> "(2) Samsung also showed a 40-inch AM-OLED screen and is partnering with
> DuPont on OLED products and processes.
I've seen it. I was not too much impressed by the picture quality.
It was dim, yellowish, and full of bad pixels. Still, it is an amazing
achievement to be able to do this with an amorphous silicon backplane.
It had 4 sub-pixels, by the way: RGB+white. RGBW is becoming popular
for various display types that use (lossy) color filters, mainly LCD.
The Samsung OLED is white, with filters on top, hence the RGBW.
> "(3) LG.Philips had a display showing unique ways to combine LEDs and
> cold cathode fluorescent lamps (CCFLs) for improved color rendering,
They call it the "hybrid backlight".
> lower power consumption, and higher brightness levels.
than a LED-only backlight... !
By the way, wide color gamut was quite a big issue this year.
> "(4) LG Philips also showed new 37-inch, 42-inch, and 47-inch 1920x1080
> pixel TFT LCD arrays, suitable for monitors or TVs.
Yes. Note that 1080p is a bit high for a 37" TV...
> "(5) Samsung had a pocket DLP projector (800x600) running with LumiLEDS
> LED illumination.
So did Philips, I think, but I was paid to watch other things.
There was a whole session on LED illumination for projectors, and it
seems to become a feasible solution, even for larger rear-projectors.
> "(6) Philips showed their Aptura lighting technology which improves
> black levels. The backlight source is modulated according to scene
> brightness.
Backlight dimming was only a minor part of the improvement, a much
larger part was the "scanning" part of the backlight, and that it was
an HCFL backlight ! Each of the 8 lamps is turned on for only 1/3 of
the time, or less, and this improves the motion smear a lot.
> Color rendering is also improved.
That was a different set-up, where they use two sets of HCFL lamps
with different phosphors. With field-sequential illumination this
creates 6 primaries, for a (somewhat) larger color gamut.
Mitsubishi with LumiLeds showed an LCD with field-sequential backlight
consisting of 3+3 LEDs, for a color gamut that was a whole lot larger.
They showed a static image next to a print inside a Gretag-MacBeth
light box, and to the eye the pictures had identical colors, even for
critical deep red and saturated cyan colors. Unfortunately, but
predictably, our photos of the display showed different colors !
> "(7) Numerous TFT LCD polarizing films were shown that greatly improve
> off-axis viewing of TFT LCD displays; one demo was as good as any CRT
> or plasma display in terms of wide viewing angles, on-axis and off-axis.
Yes. Some LCD types need this more than others, they depend heavily on
these compensation foils. Polarizing films is the wrong word, I think.
> "(8) LG Philips had demonstrations of pulsed backlights and black
> frame insertion to solve the LCD motion 'smear' problem.
> They both worked very well.
It is a similar approach as our scanning backlight, only implemented
with different components. Their demo video was not so well chosen.
> "(9) Osram had an enormous white LED backlight that lit up half the
> aisle near their booth. You really needed sunglasses to see it, it
> hurt my eyes!
Hey, ALL backlights are painfully bright, if you operate them naked.
If you want 600 nits front-of-screen brightness, and a white LCD passes
only 4-6% of the light, then the backlight must make 10000-15000 nits !
> "(10) Brillian showed their 67-inch 1920x1080 LCoS TV, they are still
> looking for an OEM partner and also had to borrow $4M just to stay in
> business this quarter.
There were some papers on LCoS solutions, but some of these were
"farewell" type of papers. Especially those from Philips Research
had a painful tone to us. Game over.
> "(11) Toshiba and Canon finally showed up to present two papers on
> SED technology. They are still shooting for the 36-inch category,
> despite what was said at CES. It is the battle line between plasma
> and LCD right now.
People were crowding at the author interview, hoping to see a demo
of the SED display. But they had brought none. Rumour was that this
is the end of SED. I do not know if this is true.
> iFire also had a 37-inch FED which they showed privately, aimed at
> the same market.
I did not see it, and on their stand they only showed their plans
for the factory that they are building now. It is NOT an FED, it is
an EL display. It is a blue display, with conversion dyes (or
phosphors ?) for making red and blue. It seems an interesting concept,
that may well compete with FED.
Daan den Engelsen gave an interesting seminar about the temptation
of FEDs, and they are still not ready for production.
> "(12) Attendance was well over 6,000 this year."
With short courses, seminars, application tutorials, symposium,
business conference, business seminars and an exhibition, that
is not even a large number. There was so much to see and do.
(Mark:)
> I caution everyone that only a very tiny fraction of what gets
> reported at SID ever makes it to the market.
Indeed, many papers are of the "farewell" type, though you don't
always know which. Philips at least has announced that we will
invest 40 million Euro in the production of (HCFL) backlights.
There were some interesting 3D displays, with two microdisplays,
with volumetric rendering in 20 planes, with lenticular screens
for multi-view autostereoscopic rendering, and an RPTV from JVC
for which you had to wear polarizing glasses. That one had by
far the best picture, so I will take the glasses, thank you.
I think that I've seen one CRT on the entire exhibition: an
ultra-slim real-flat type from Samsung. Some companies can now
also make ultra-slim rear projectors, e.g. a 60" that is only
some 6" deep. That's less than a flat panel on its stand...
And these projectors (with microdisplays inside, typically DLP)
have surprisingly good uniformity and geometry. Amazing, but
soon you can buy a plasma panel for almost the same price.
Greetings,
-- Jeroen
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| From: Jeroen H. Stessen | E-mail: Jeroen.Stessen@xxxxxxxxxxx |
| Building: SFJ-5.22 Eindhoven | Deptmt.: Philips Applied Technologies |
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