The development of a new TFT-LCD that delivers high transmittance, a wide
viewing angle and high speed response by combining optically compensated
bend (OCB) and field-sequential technologies has been announced by Toshiba
Matsushita Display Technology.
Field Sequential technology does not require colour filters, differing from
general colour LCDs. Therefore, the Field Sequential method enables high
transmittance without any absorption loss. In the colour filter method, more
than 70% of back light brightness is absorbed by colour filters. Field
Sequential technology also delivers up to three times higher resolution by
not dividing each pixel; the colour filter method use three subpixels which
combine to form one RGB pixel.
This technology has great advantages but must be driven at least three times
as fast in order to show RGB signals, so a high-speed response LCD is
indispensable to realize its full performance.
Accordingly, the company has combined the high-speed response
characteristics of its OCB technology with field-sequential technology to
develop an LCD that provides: high transmittance (2.6 times higher than the
company's previous OCB panels); low power consumption; a wide viewing angle
(Upper/Lower 170 degree, Left/Right 170 degree); and fast response (3.3ms).
This results in an LCD with high brightness and ultra high resolution that
is suitable for applications including mobile AV, says the company.
