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why is the t610 screen stn and not tft? |
chungagoring
Joined: Jul 25, 2002
Posts: > 500
From: Madrid, Spain
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firstly, i have to admit that i really don't know the advantages of tft screens to stn screens. t610 screen is 65k colours, so i wonder, does it really matter if it's tft or stn? i believe that a 65k colour screen is always going to look great.
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[ This Message was edited by: chungagoring on 2003-05-06 17:38 ] |
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Rashkae
Joined: Jun 03, 2002
Posts: > 500
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TFT and STN are all LCD screens...
The difference is in the implementation. Aside from bright daylight situations (where STN screens look dark) the T610 screen looks fantastic! |
chungagoring
Joined: Jul 25, 2002
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From: Madrid, Spain
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from what you say, i then guess the important issue is not "tft or stn" but "number of colours" and "lighting quality".
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ozzie_uk
Joined: Feb 28, 2003
Posts: 54
From: London, UK
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Simple - battery life. |
ynohtna
Joined: Dec 27, 2002
Posts: 278
From: PH
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Grab hold of a p800 or a nokia 3650 and compare it to a samsung t100 and really see the diference.What more of the latest models v200,t500.In terms of brightnes and color vividness and hues,the TFT beats the STN.The only drawback i think of the TFT is it is a power guzzler;it consumes battery faster than the STN.
With re to d meaning of these 2:
Stn=super twisted nematic
Tft=thin film transistor(m nt so sure)
I stand to be corrected.Tnx for the help for the enlightenment of many readers here.
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simon69c
Joined: Feb 24, 2003
Posts: 177
From: Southampton, UK
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Well this is my (layman's) understanding of it (please correct if way off the mark!)...
The difference is essentially that TFT is an active matrix in that it turns pixels both on and off. An STN screen is a passive matrix - it turns the pixels on but not off - they turn themselves 'off' after a short delay of not being 'on'.
The result is that STN screens can sometimes appear blurry if there is a rapid amount of change in what is being displayed (aka ghosting) as the pixels don't quite keep up with what should be displayed as they don't turn off fast enough. A TFT screen will keep up much faster since all the pixels are being actively turned on and off as required. TFT screens consume a lot more power though and are so quite rare in devices like mobile phones where power is a premium. The few phones that do employ TFT screens (e.g. Samsung T100) tend to have much poorer battery performance. Hence if the manufacturers can make STN screens good enough they make much more sense than TFT for mobile phones. |
roopi
Joined: May 30, 2002
Posts: 55
From: b'ham uk
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excellent explanation simon69c, you said everything that needs to be said on the subject
TFT - Thin Film Transistor - a transistor sandwiched behind every LCD pixel, pushing it on or off
[ This Message was edited by: roopi on 2003-05-06 18:01 ] |
znawfal
Joined: Mar 17, 2003
Posts: 25
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I have a question re the topic:
i ve been doing some research and i learnt that TFT screens use a A/C current thus the ability to turn pixels on and off (and u dont really need a screen saver) while a STN uses a D/C current (thus we need a screen saver and it is not able to force a pixel off)...
If this is true, (at least on a PC screen), please someone tell me how can a phone like Samsung utilise an A/C current.. thanks
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roopi
Joined: May 30, 2002
Posts: 55
From: b'ham uk
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errr... not sure about that. anybody else know? |
chungagoring
Joined: Jul 25, 2002
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From: Madrid, Spain
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@ynohtna
but p800 screen is tft. 3650 is stn i think. the only difference between these and t100's is that they're just 4096.
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Freak
Joined: Aug 31, 2002
Posts: 349
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Quote:
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On 2003-05-06 19:45, chungagoring wrote:
@ynohtna
but p800 screen is tft. 3650 is stn i think. the only difference between these and t100's is that they're just 4096.
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Is P800 TFT? i thought it was STN? |
robpow
Joined: Jan 20, 2002
Posts: 70
From: London, UK
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Was reading some interesting guesses at the difference between different screen types above... 
The important difference between active matrix (TFT) and passive matrix (STN) is that the TFT screen has a number of dedicated control transistors per pixel which makes the response time and clarity of the screen much better. A passive matrix screen has only control transistors per row and column of pixles meaning cheaper displays but less speed and contrast.
Matt |
chungagoring
Joined: Jul 25, 2002
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From: Madrid, Spain
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@freak
p800 screen looks so totally amazingly great that must be tft 
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Freak
Joined: Aug 31, 2002
Posts: 349
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Quote:
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On 2003-05-06 20:26, chungagoring wrote:
@freak
p800 screen looks so totally amazingly great that must be tft
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yes, P800 screen is very god, but i´m not to sure that it is a TFT! |
FRiC
Joined: Mar 27, 2003
Posts: 123
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TFT has transistors on each pixel, while STN has transistors by rows and columns. That's why TFT screens can have "bad pixels", while STN screens will have an entire row or column go blank.
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Posted: 2003-05-06 18:06
