Samsung Electronics Introduces World's First VGA-class TFT-LCD Driver IC for Mobile Phones
Seoul, Korea, Oct. 21, 2004: Samsung Electronics, a
leader in advanced silicon technology solutions, today
announced that it has developed a TFT-LCD driver IC
chip with VGA-class resolution capable of displaying
up to 260K colors for TFT-LCD panels in mobile phones.
Samsung's new driver ICs generates color using an
entirely new driving method, which is called sub-pixel
unit driving methodology. Contrary to existing color
display method that expresses color pixel by pixel,
this new method creates color at the sub-pixel level
representing more than two data from the same pixel.
By composing a new pixel with the sub-pixel on the
adjacent scanning line, 480*640 VGA resolution can be
attained from a 240*640 half-VGA panel.
Additionally, the problem of dark screen due to the
increased pixel density on high resolution panels has
been solved using 4-color (R-G-B-W) rendering
algorithm that greatly improves the brightness of TFT-LCD
panels. With this 4-color rendering algorithm, which
extracts white signal from R-G-B signal input and
processes 4-color R-G-B-W, the brightness of panel is
increased more than 50 percent.
The new driver IC has overcome the physically
impossible VGA-class and higher resolution images on
small size TFT-LCD panels of less than 2.4 inches by
resolving the vast space required for wiring
connections between the panel and driver IC. Darker
screens, due to the limited exposure area of a single
pixel, also have been settled by adopting the
sub-pixel rendering method and 4 color technology.
Conventional technologies for extracting white from
red, green and blue have been plagued with color
distortion when the white color is added by more than
15 percent. Samsung's new white-adding algorithm
prevents any color distortion, even when white is
fully added. At the same time, uniform color quality
is maintained between input and output,.
"Development of high-resolution displays is
urgently needed with the advent of camera phones,
video phones, TV phones and other new products that
require an entirely different level of image
quality," said Dr. Jin-tae Kim, vice president of
System LSI Division at Samsung Electronics. "The
4-color sub-pixel rendering technology we recently
developed will play a key role in the transition to
ultra-high-resolution panels for mobile products.
Moreover, our development of this new chip will put us
in an advantageous position in the hotly-contested
market for mobile size displays."
The new technology is a result of synergy between
respective business and R&D function at Samsung:
the semiconductor technology of System LSI Division
and the display technology of LCD Business, together
with the patented algorithm for adding the color white
from Samsung Advanced Institute of Technology (SAIT)
Samsung Electronics plans to begin using its VGA TFT-LCD
driver IC on high-end mobile phone models in the
second quarter of 2005. The company will then steadily
expand its application to other product lines.
Market analyst firm, iSuppli, estimates that the
market for mobile TFT-LCDs stands at 250 million units
this year and the number is predicted to surge to 530
million units in 2007.