(Japanese Site)
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| Sony to Commercialize Reflective Color TFT-LCDs in 1999
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July 13, 1998 (TOKYO) -- Sony Corp. developed reflective, color
polycrystalline silicon thin film transistor-liquid crystal
displays (TFT-LCDs) that operate at low temperatures, and it
exhibited them at a private technical show.
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The reflective panels are a 8.6-in. model with 1,024 x 384 pixels
and a 4-in. model with 320 x 240 pixels. Each model has a contrast
ratio of 17:1 and reflectance of 30 percent, both of which rank
high among reflective LCDs, according to the company.
Use of reflective LCD technology enables the development of thinner
and lighter displays because they do not need back lights and they
consume less energy.
Sony will commercialize the LCD technology for use in portable and
outdoor-use devices, such as camcorders, digital cameras, personal
digital assistants (PDAs) and handheld personal computers as early
as next spring.
CMOS driver circuits using low-temperature polycrystalline silicon
are integrated on its glass substrate. A digital to analog
converter, which also is implemented on the glass substrate, allows
direct input of digital signals.
Also, Sony is developing smaller low-temperature polycrystalline
silicon TFT-LCD panels suitable for use in digital cameras.
The company will commercialize a front-light-adapter panel that has
a light source to brighten the reflective LCD screen. This adapter
will be used in the darkness, when daylight or artificial lighting
is too dim to allow sufficient reflection, Sony said.
(Hi-Tech News Center)
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