[opendtv] Re: Philips ClearLCD technique for motion sharpness
- From: "Prinyar Boon" <Prinyar.Boon@xxxxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 21 Jan 2005 16:27:48 -0000
Fingers-crossed-for=20the=20=3D20%'s
Jeroen=20and=20I=20have=20discussed=20this=20before=20between=20us.=20We=20=
have=20an=20aged=20LCD
TFT=20panel=20in=20the=20lab.=20=20A=20circular=20zone=20plate=20who's=20p=
hase=20is=20changing=20at
a=20critical=20speed=20gives=20a=20STATIC=20residual=20pattern=20of=20the=20=
zone=20plate=20when
the=20source=20is=20removed.=20=20If=20you=20then=20do=20the=20classic=20w=
aving=20of=20your
fingers=20in=20front=20of=20your=20eyes=20you=20apparently=20see=20interla=
ce=20twitter=20-=20the
TFT=20panel=20was=20being=20driven=20with=20a=20progressive=20image.
This=20is=20the=20effect=20of=20the=20combination=20of=20the=20two=20effec=
ts=20that=20Jeroen
desribes.
Prin
Prinyar=20Boon
Snell=20&=20Wilcox=20Ltd
Liss=20Mill
GU33=207BD
email:=20prinyar.boon@xxxxxxxxxxxxxxx
Tel:=20+44=20(0)2392=20489=20280=20direct
Fax:=20+44=20(0)1730=20894=20341
www.snellwilcox.com
-----Original=20Message-----
From:=20opendtv-bounce@xxxxxxxxxxxxx=20[mailto:opendtv-bounce@xxxxxxxxxxxx=
g]
On=20Behalf=20Of=20jeroen.stessen@xxxxxxxxxxx
Sent:=2021=20January=202005=2016:15
To:=20opendtv@xxxxxxxxxxxxx
Subject:=20[opendtv]=20Re:=20Philips=20ClearLCD=20technique=20for=20motion=
=20sharpness
Hi,=20
I=20wrote:=20
>>=20image=20retention.
John=20Golitsis=20wrote:=20
>=20Everybody=20had=20thought=20it=20impossible=20on=20an=20LCD-based=20di=
splay
Well...=20not=20everybody...=20It=20is=20very=20possible.=20Even=20if=2030=
=20Hz=20polarity
inversion=20is=20applied=20then=20it=20can=20still=20beat=20with=20a=20res=
idu=20of=2030=20Hz=20line
flicker=20from=20an=20imperfect=20de-interlacer=20and=20cause=20a=20DC=20v=
oltage=20component
on=20the=20cell.=20This=20then=20causes=20some=20image=20retention,=20whic=
h=20manifests=20as=20a
30=20Hz=20flickering=20after-image,=20and=20only=20goes=20away=20after=20a=
=20long=20time.=20Some
LCDs=20are=20much=20more=20sensitive=20to=20this=20than=20others,=20so=20b=
e=20careful=20when
supplying=20your=20own=20(cheap)=20de-interlacer...=20(PC=20!)=20
It=20is=20of=20course=20not=20"burn-in"=20as=20we=20know=20it,=20i.e.=20ph=
osphor=20wear.=20
It=20is=20a=20change=20of=20physical=20properties=20of=20the=20LC=20cell=20=
by=20ion=20transport.=20
But=20it=20can=20be=20just=20as=20annoying,=20and=20nobody=20knows=20for=20=
sure=20how=20long=20it
takes=20to=20fade=20away.=20One=20LCD=20thermometer=20in=20my=20home=20is=20=
more=20or=20less
destroyed=20because=20I=20left=20it=20running=20for=20too=20long=20on=20an=
=20almost=20empty
battery.=20That=20low=20battery=20warning=20was=20apparently=20not=20for=20=
nothing=20!=20
Regards,
--=20Jeroen=20
+-------------------------------+---------------------------------------
-+
|=20From:=20=20=20=20=20Jeroen=20H.=20Stessen=20=20=20|=20E-mail:=20=20Jer=
oen.Stessen@xxxxxxxxxxx
|
|=20Building:=20SFJ-5.22=20Eindhoven=20=20|=20PHILIPS=20Applied=20Technolo=
gies
|
|=20Phone:=20=20=20=20++31.40.2732739=20=20=20=20=20|=20Visiting=20&=20mai=
l=20address:=20Glaslaan=202
|
|=20Mobile:=20=20=20++31.6.44680021=20=20=20=20=20|=20NL=205616=20LW=20Ein=
dhoven,=20the=20Netherlands
|
|=20Pager:=20=20=20=20++31.6.65133818=20=20=20=20=20|=20Website:=20http://=
www.pdsl.philips.com/
|
+-------------------------------+---------------------------------------
-+
=20
=20
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