Product category:
Analogue and Mixed Signal ICs
News Release from: Oki Electric | Subject: Source driver LSI for large TFT LCDs
Edited by the Electronicstalk Editorial
Team on 15 February 2005
Driver puts more colour into
large-screen TFTs
Oki Electric has developed a source driver LSI for large TFT LCDs that achieves one billion colours in high resolution.
Oki Electric has developed a source driver LSI for large TFT LCDs that achieves one billion colours in high resolution Whereas other chip makers have an 8bit input with 16.7 million colour display, Oki's new chip, the ML9156, has a 10bit input with one billion colour display - boasting 60 times higher picture quality than other chips
This article was originally published on Electronicstalk on 10 Apr 2002 at 8.00am (UK)
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Oki is the world's first company to ship such a high picture quality chip in volume.
"Oki's driver chips for LCDs have been evaluated highly from our customers for the reliability and ability to drive large screens", said Akira Kamo, President of the Silicon Solutions Company at Oki.
"Because this newly developed chip can display one billion colours, users can enjoy watching movies on their LCD TVs with beautiful vivid colours".
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"We are proud to be the world's first company to provide such product in volume to our worldwide customers".
Using the thin, high quality, light and low power consumption features, LCDs are penetrating into various fields demanding LCD TVs to deliver cinema-quality viewing.
A 10bit driver is a key device to achieve such high quality.
However, with conventional technologies, the digital/analogue (D/A) convertor circuit that takes up most of the chip space would have been four times larger than that used in an 8bit driver chip, making the cost go up.
Oki overcame this technical hurdle by developing an innovative 10bit driver LSI that suppresses the increase of the D/A convertor circuit space to 1.3-fold and can be produced in volume at an affordable price range.
In addition, by increasing the maximum 256 tones in 8bit driver LSIs to a maximum of 1021 tones in the 10bit LSI, Oki can display the deeper and richer colours as well as the delicate black in dark scenes in movies.
Because LCD panels are used in various scenes, several developments to achieve high quality pictures such as wide viewing angle and improved response time of the liquid crystal are conducted.
Although the driving voltage in each liquid crystal varies in general, the maximum LCD voltage of the ML9156 covers a wide range from 10 to 16.5V, which responds to various LCD drive voltages.
In addition, by using reduced swing differential signalling (RSDS) for its data signal interface, the ML9156 enables low electromagnetic interference (EMI).
The chip also mounts output selection functions for various resolutions, which enables it to be used not only in mainstream large LCD TVs such as WXGA, HDTV but also to various resolution panels such as XGA, SXGA, SXGA+.
Oki has already delivered its product to Toshiba Matsushita Display Technology.
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