TOKYO, March 8 /PRNewswire/ -- Toshiba Corporation today announced
innovations in the design and manufacture of low-temperature polysilicon thin
film transistor (TFT) liquid crystal displays (LCD) that significantly boost
pixel integration, enhance resolution, achieve a lower component count and
reduce the size of external printed circuit board, all while achieving savings
in power consumption and display cost.
Toshiba established its industry leadership in low-temperature polysilicon
TFT LCDs by commercializing the world's first large sized displays, and since
then has pioneered the development of ever-larger displays. The company today
reconfirmed its cutting-edge position with a series of important innovations,
including the integration of a digital-analog converter and amplifier into
display peripheral circuits and the first application of 3-micron process
technology to LCD manufacturing.
Toshiba's success in integrating the DAC and amplifier into the peripheral
circuits marks a key industry-first that cuts the number of external
components required for displays and the size of the PCBs housing those
displays. The present DAC supports display of 260,000 colors, a level
suitable for mobile information equipment.
The company's advance to 3-micron technology, at a time when other LCDs
still rely on the 4-micron process, brings with it numerous advantages,
starting with lighter, slimmer products. Circuit integration is boosted by
approximately five times over current low temperature polysilicon LCDs, and
the advanced level of process technology allows DAC and amplifier to be
integrated on the glass substrate -- a move that further cuts the peripheral
component count and increases display efficiency. Integration of the DAC and
amplifier analog circuits is achieved by advanced excimer laser anneal (ELA)
technology that improves electron mobility to a level 50% higher than in
current low temperature polysilicon LCDs, realizing a higher resolution.
These advances in integration technology support the concept of "System on
Glass," in which all external ICs are integrated on the glass substrate of the
LCD, without any use of PCBs. In reflective LCDs each dot integrates a 1-bit
SRAM, supporting lower power consumption during display of still pictures.
Toshiba recognizes the low-temperature polysilicon TFT LCD as offering the
most promising solution for mobile personal equipment of any commercialized
display. The displays are much lighter and slimmer than amorphous Si TFT
displays, and their use of crystallized silicon results in a brighter, more
responsive display offering higher resolution. The company currently deploys
the widest lineup of low-temperature polysilicon TFT LCDs on the market, for
application in cellular phones, personal digital assistants and portable PCs,
and will enhance display performance though application of its new
SOURCE Toshiba Corporation