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Message |
DaViD_BRaNDoN
Posts: 18
Phone Model:
Nokia 6260
Service Provider:
Celcom |
 
Sun Jul 11, 2004 5:14 am |
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I saw reviews that Z600 has TFD LCD and T630 has TFT LCD. What's the difference between TFD and TFT?
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DaViD_BRaNDoN
Posts: 18
Phone Model:
Nokia 6260
Service Provider:
Celcom |
Wed Jul 14, 2004 12:55 pm |
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No clue...?
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Comander_57
Posts: 16
Phone Model:
SE T610
Service Provider:
Telstra |
Mon Jul 19, 2004 9:03 pm |
G'Day,
Suprised no-one has cleared this issue up for u yet, look at ur keyboard and notice that the D & F keys are right next to each other. The review u have read obviously has a miss print. FYI:
T610: 65,000 colour 16 bit STN LCD SCREEN
T630: 65,000 colour 16 bit TFT LCD SCREEN
Z600: 65,000 colour 16 bit TFT LCD SCREEN
The dif between TFT and STN is that TFT has the circutry placed under the glass which makes the refresh rate much faster than an STN screen. They also look a lot ritcher and brighter in colour, but best of all they dont wash out in sunlight.
SO TO RECAP... THERE IS NO SUCH THING AS TFD SCREENS.
Hope this helped,
Camander 
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marc_rivz
Posts: 10
Phone Model:
Sony Ericsson T610
Service Provider:
Telstra (Australia) |
Wed Jul 21, 2004 5:19 am |
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What do u mean "wash out" by the sunlight?
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Allen
Posts: 2212 |
Wed Jul 21, 2004 6:15 am |
Once upon a time screens used STN (Super Twisted Nematic) LCDs. They were cheap, inexpensive to manufacture, and consumed low power. But as applications started getting more advanced, the STN soon became insufficient for user's needs. STNs have a problem with "ghosting," which is when remnants of the previous screen are still noticeable when the screen changes to a new image. When fast refresh rates are needed like for games, the STN fails miserably. They usually display 256 colors, 4,096 colors, and 65,000 colors.
In the late 1960s, the TFD (Thin Film Diode) was invented by "sandwiching" diodes between two thin pieces of glass and placing it on the screen. The result is faster refresh rates and minimal ghosting because now there is no need to scan for lines on the screen. The diodes are places directly on the screen. And power consumption is as low as STNs which make it ideal for phones. They usually display 65,000 colors.
Finally, the TFT (Thin Film Transistor) came around and produced even more crystal clear images with faster refresh rates than TFD. As phones increase to more and more colors, TFD couldn't handle it. So TFT is usually used with displays of 4,096 colors, 65,000 colors, and 260,000 colors. But with the increased colors, refresh rates, and clarity, the power consumption is much higher resulting in more frequent battery charging.
Allen 
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DaViD_BRaNDoN
Posts: 18
Phone Model:
Nokia 6260
Service Provider:
Celcom |
Thu Jul 22, 2004 8:34 am |
| Allen wrote: | Once upon a time screens used STN (Super Twisted Nematic) LCDs. They were cheap, inexpensive to manufacture, and consumed low power. But as applications started getting more advanced, the STN soon became insufficient for user's needs. STNs have a problem with "ghosting," which is when remnants of the previous screen are still noticeable when the screen changes to a new image. When fast refresh rates are needed like for games, the STN fails miserably. They usually display 256 colors, 4,096 colors, and 65,000 colors.
In the late 1960s, the TFD (Thin Film Diode) was invented by "sandwiching" diodes between two thin pieces of glass and placing it on the screen. The result is faster refresh rates and minimal ghosting because now there is no need to scan for lines on the screen. The diodes are places directly on the screen. And power consumption is as low as STNs which make it ideal for phones. They usually display 65,000 colors.
Finally, the TFT (Thin Film Transistor) came around and produced even more crystal clear images with faster refresh rates than TFD. As phones increase to more and more colors, TFD couldn't handle it. So TFT is usually used with displays of 4,096 colors, 65,000 colors, and 260,000 colors. But with the increased colors, refresh rates, and clarity, the power consumption is much higher resulting in more frequent battery charging.
Allen |
Thanks for the great info. I thought of switching to SE Z600 but now I'll just stick with my current SE T630 (for its TFT LCD).
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DaViD_BRaNDoN
Posts: 18
Phone Model:
Nokia 6260
Service Provider:
Celcom |
Thu Jul 22, 2004 8:37 am |
| Comander_57 wrote: | G'Day,
Suprised no-one has cleared this issue up for u yet, look at ur keyboard and notice that the D & F keys are right next to each other. The review u have read obviously has a miss print. FYI:
T610: 65,000 colour 16 bit STN LCD SCREEN
T630: 65,000 colour 16 bit TFT LCD SCREEN
Z600: 65,000 colour 16 bit TFT LCD SCREEN
The dif between TFT and STN is that TFT has the circutry placed under the glass which makes the refresh rate much faster than an STN screen. They also look a lot ritcher and brighter in colour, but best of all they dont wash out in sunlight.
SO TO RECAP... THERE IS NO SUCH THING AS TFD SCREENS.
Hope this helped,
Camander |
Dude, it's not only 1 review. I've googled (and read tons of it) everywhere for SE Z600 specs and reviews. And you know what, all of it mentioned TFD.
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gforce
Posts: 858
Phone Model:
N6600. Looking around for a cheap 6630.
Service Provider:
Orange |
Mon Jul 26, 2004 2:27 am |
Yup, the Z600 definitely has a TFD screen.
@Allen Thanks for the detailed reply.....
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marc_rivz
Posts: 10
Phone Model:
Sony Ericsson T610
Service Provider:
Telstra (Australia) |
Mon Jul 26, 2004 3:09 am |
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What do u mean "wash out" by the sunlight?
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leond
Posts: 2
Phone Model:
6210
Service Provider:
Orange |
Tue Jul 27, 2004 4:28 am |
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There's a good article on MD-TFD at the Mobile Phone Directory if that's any help
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