High Picture Quality 3.4 cm (1.35-Type) 1.05M-dot Wide XGA
HDTV Projector LCD for the Coming Digital Age
LCX037BL
As the trend towards digital TV broadcasting acceler-
ates, the needs for large screen high picture quality
displays are growing rapidly. The HDTV LCD projec-
tor is expected to become one of the mainstays of
this area.
To respond to these hopes, Sony has now developed
a new 3.4 cm (1.35-Type) 720P digital HDTV LCD that
adopts Sony鈥檚 unique high picture quality circuit tech-
nology and optimal pixel design technology.
This device, the LCX037BL, is an HDTV front projec-
tor LCD, a device that will be indispensable for home
theater displays in the digital age.
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Achieves high transmittance (17%) as a 3.4 cm
(1.35-Type) 1.05M-dot wide XGA LCD.
Improved contrast and completely horizontal
crosstalk-free due to display the adoption of the
Dot-Line inversion drive method.
Vertical crosstalk-free up to the HD format due
to the adoption of the 2STEP dot sequential
precharge method.
Brightness shading-free due to the adoption of
OCS (on-chip spacer) technology.
Vertical crosstalk-free due to adoption of a high
light resistance device structure (DMS*
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Up/down and/or right/left inversion functions
Built-in input level conversion circuits
3.4 cm (1.35-Type) LCD
for 720P Digital HDTV
Sony has achieved an aperture ratio of
52% and an optical transmittance of
17% in a wide XGA display (1366H
脳
768V) LCD with 1.05M dots. Achiev-
ing this required the introduction of a
unique new Sony-developed structure
(DMS), the development and introduc-
tion of a new fabrication process, and
the use of high-precision LCD orienta-
tion technology. As a result, this device
can provide bright fine-grained display
of digital HDTV broadcasts, and can
create bright but subtle pictures even on
a large screen.
High Picture Quality
Achieved
By adopting Sony鈥檚 unique newly-
developed picture quality improving
鈥淒ot-Line inversion drive method,鈥?/div>
complete crosstalk-free is achieved.
(See figure 1.) Due to this drive tech-
nology and an optimized pixel design
that reduces the amount of light leak-
ing around pixels, Sony was able to im-
prove the contrast to over 350:1 when
VSIG =
鹵5.0
V. Furthermore, to achieve
vertical crosstalk-free display even for
video formats such as HDTV that have
an extremely short blanking period,
Sony developed the new 2STEP dot se-
quential precharge drive method. (See
figure 2.) The LCX037BL achieves high
uniformity while supporting even higher
brightness levels by using both the high
light resistance DMS structure and the
OCS (on-chip spacer) structure in the
surface of the device structure. (See fig-
ure 3.) Additionally, by using the
CXD3503R color shading correction
IC, end products can provide fine-
grained correction not only for the color
shading due to the LCD panel itself, but
also that due to the optical system. This
allows end products to provide excel-
lent image uniformity.
Ease of Use
At the same time, Sony has also devel-
oped the new CXD3504R as a system
IC for the LCX037BL, which adopts a
new drive method. A system structure
consisting of the CXA3512R high-
voltage sample-and-hold IC, which has
an excellent reputation, and the
CXD2467AQ, which integrates both a
programmable TG and RGB drivers on
a single chip, can create an environment
that can take full advantage of the
characteristics of this LCD panel. (See
figure 4.)
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DMS: Dual Metal Shield
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We developed the LCX037BL
with the goal of achieving the
superb picture quality required
to satisfy the home theater
market. We developed a new
LCD drive technique, a new device
structure, and a new system IC
for this product. All of us in the
development team strove to
improve the LCD characteristics
as much as possible. We are
confident that the LCX037BL will
be rated number one in the home
theater market.
SONY
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