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LG.Philips, E Ink team on 10-inch flex display

Posted by inet - 2005-10-20

MANHASSET, N.Y. — Electronic paper display technology E Ink Corp. and thin-film-transistor (TFT) liquid crystal display supplier LG.Philips LCD have developed a 10.1-inch flexible electronic paper display the companies believe is the largest flexible display produced to date.

The tablet-size display, to be shown at the FPD International trade show in Japan, measures less than 300 microns thick. The thin paper-white display achieves super VGA (600 x 800) resolution at 100 pixels per inch and has a 10:1 contrast ratio with four grayscale levels.

The team-up between E Ink (Cambridge, Mass.) and LG.Philips LCD (Seoul, South Korea) is interesting, as the current dominance of LCD technology is perceived to be one obstacle to the mass acceptance of flexible display technology.

E Ink developed a material, called Imaging Film that looks like printed ink on paper and has been designed for use in paper-like electronic displays. The E Ink Imaging Film uses 100 times less energy than a LCD because it can hold an image without power and without a backlight, said the company.

LG.Philips LCD and E Ink selected a steel foil that could be supplied by Sumitomo Corp. in high volume. Developed by Nippon Steel Corp, the thin flexible foil can easily withstand the high temperatures of TFT production.

LG.Philips LCD combined both materials to manufacture the display panel at an existing pilot TFT line in Korea. LG.Philips and E Ink jointly designed the display electronics and produced the final prototype.

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