ETC ACX301AK Low-temperature polysilicon tft lcd Datasheet

Low-temperature Polysilicon TFT LCDs
Evolving Towards Higher Picture Quality Picture and Lower Power
200K-dot Transmissive Color LCDs in 2.0, 2.5, 3.5-inch Sizes
ACX300AK, ACX301AK, ACX302AK
The ACX300 Series (the ACX300AK, ACX301AK, and ACX302AK) are
even more highly evolved low-temperature polysilicon TFT LCD
panels than the earlier models that have been used as small-sized monitors that meet the needs for high picture quality in AV equipment such
as digital still cameras and digital video cameras. As such, these new
products can truly be called the next generation products.
These panels, which take full advantage of the latest low-temperature
polysilicon TFT process technology and polysilicon TFT circuit technology, can achieve reduced power consumption, higher definition, and
increased transmittance at the same time, and promise radically increased competitiveness for products that incorporate them.
Industry’s Highest Resolution
Achieved by Taking Maximum
Advantage of the Lowtemperature Polysilicon TFT
By taking advantage of not only the
high-mobility transistor performance,
which is a feature of the low-temperature polysilicon TFT, but also high
aperture ratio pixel design, Sony
succeeded in increasing the horizontal
resolution by 20% over earlier Sony
models. The ACX300 Series products
take full advantage of Sony’s low-temperature polysilicon TFT technology to
achieve the high transmittance of
current 100K to 120K-dot class products (increased by 15% over 2.5-inch
Sony products) despite being 200K-dot
high definition products. This improved
definition provides smooth, finegrained high-quality picture without
apparent dots.
V
O
I
C
E
ST LCD Corporation has begun
LCD panel production now. Moreover, they will be producing a full
product line of panels from an
early date. Pictures that are faithfully reproduced down to the
finest detail by advanced lowtemperature polysilicon TFT technology will become standard in
small-sized LCD monitors from
now on. I strongly recommend that
you try these products.
Low-Power Technology
To respond to the trend towards lower
power in digital video cameras and other
AV equipment, the ACX300 Series
adopts a precise power control system
for each drive circuit block in the panel,
and also adopts a 12-V supply voltage.
This reduces the panel power consumption by 60% over earlier models, and
achieves the low power consumption of
50 mW (typical) (60 mW for the
ACX302) when 12-V drive is used.
Since all timing signal inputs accept 3-V
level signals, the LCD system power
can be reduced in products that include
these panels. Furthermore, since the
drive system uses the Sony CXA3268R
low power highly integrated IC, which
integrates the precharge signal (Psig)
and other signals that were previously
generated as external devices, the number of external components in the LCD
system can be reduced.
■
Number of active dots: 200K
(delta arrangement)
■
Horizontal resolution: 440 TV
lines
■
Low power consumption
■
Supports 3-V drive signals
■
Supports NTSC/PAL 16:9 mode
■
Up/down and/or right/left inversion functions
■
AG (anti-glare) coatings
■
Thin form-factor panel using
0.7-mm glass
Lineup Supports a Wide
Range of Applications
— From digital still cameras
to small TV sets —
All of the unique TFT process and highquality technology developed by Sony,
the industry leader in low-temperature
polysilicon TFT panel development, is
applied in the ACX300 Series smallsized LCD panels. The product line includes three sizes: 2 inches (the
ACX301), 2.5 inches (the ACX300) and
3.5 inches (the ACX302), and thus includes a screen size optimal for almost
any product, from digital still cameras
to video cameras and small TV sets.
Furthermore, since all models have the
same system structure, it is extremely
easy to create a series of related application products.
High-Quality Panels
Supplied from a New Factory
The ACX300 Series panels are manufactured by ST LCD Corporation, which
is a joint venture between Sony Corporation and TOYODA AUTOMATIC
LOOM WORKS, LTD. and is located
in Aichi prefecture. These products are
manufactured on a fully automatic line
equipped with the world’s largest and
highest performance clean room. Lowtemperature polysilicon TFTs are
formed on the world’s largest glass substrates in this high-quality line. Even
more than before, Sony is the leading
source for high-quality panels.
(The ACX302 has vertical shift registers on both sides of the screen.)
Horizontal level shifter and shift register
(bidirectional scanning)
R
RGB
drivers
G
B
FRP, HDO
VST, VCK, EN, DWN,
WIDE, HST, HCK, RGT
ACX300AK
ACX301AK
ACX302AK
FRP, BLK
LC
PSIG, VCOM
RGT
TESTR
RED
BLUE
PSIG
GREEN
HCK1
HCK2
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Coxt/Rext
EN
8
REF
VST
VCK
7
TEST
COM
6
HST
5
CS
4
WIDE
3
VSSG
2
VSS
1
TESTL
Com
Pad
■ Figure 1 ACX300AK/301AK/302AK Drive System Block
Diagram (Two-chip Structure)
Negative
voltage generation circuit
Vertical
level
shifter
HVDD
Psig/Vcom
gen.
CS
DWN
CXD2472R
VVDD
CSYNC
COM
LCD
panels
Vertical shift register
(bidirectional scanning)
Video signal
(NTSC or PAL)
■ Figure 3 ACX300AK/301AK/302AK Block Diagram
VDD
2
POF*
3V
Video signal*1
(RGB or Y/color
difference)
(NTSC or PAL)
R, G, B
CXA3268R
CSYNC or
HD, VD*1
VST, VCK, EN, DWN,
WIDE, HST, HCK, RGT
PSIG, VCOM
SDAT, SCK, SEN
LCD
panels
ACX300AK
ACX301AK
ACX302AK
Three-line serial
communication
(microcomputer
etc.)
*1: When the internal sync separator is not used, CSYNC or HD and VD are
used as the input sync signal.
When the internal sync separator is used, sync on green (RGB) or sync on
Y (Y/color difference) is used as the input sync signal.
*2: Power saving pin
■ Figure 2 ACX300AK/301AK/302AK Drive System Block
Diagram (Single-chip Structure)
■ Table 1
Panel Specifications Comparison
ACX300AK
Screen size
(mm2)
Package dimensions (mm2)
57.8 × 47.85
Optical transmittance (%)
49.8 × 44.2
78.8 × 63.3
56.75 × 163.75
46 × 134
80 × 231.25
7.0
6.0
8.5
11.4 to 14.0
Supply voltage (V)
Power consumption* (mW)
ACX302AK
880 × 228 = 200,640
Total number of dots
Dot pitch (µm × µm)
ACX301AK
40.48 × 30.55
70.4 × 52.725
49.94 × 37.34
(6.24 cm diagonal) (5.07 cm diagonal) (8.80 cm diagonal)
50
60
*: Supply voltage: 12 V
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