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Low Power Consumption and High Picture Quality 2.0-inch 200K-dot Reflective Color LCD
ACX703AKM
By combining the ACX301AK, which concentrates Sony's lowtemperature polysilicon TFT LCD technology, with Sony's unique and superlative reflective technology, Sony has succeeded in developing a revolutionary small reflective panel, the ACX703AKM, that achieves low power, high resolution, high contrast, high reflection ratio, and the ability to display pure white. This device is optimal for use in digital still cameras, which require low power and high picture quality. Sony has developed, at the same time, two drive IC options to powerfully support this reflective LCD panel. One is the single-chip IC CXA3268R, and the other is a two-chip system timing generator IC CXD2472R. Thus the ACX703AKM can respond to a wide range of product planning needs.
s Reflective LCD based on the ACX301AK 2.0-inch 200K-dot color LCD High contrast provided by the ECB mode reflective color LCD High reflection ratio provided by a diffusing reflective electrode which adopts the RMP structure Natural color and pure white display provided by BDM technology Supports NTSC/PAL 16:9 mode Powerfully supported by related products. s s
s s s
Low-power Circuits Used
The ACX703AKM uses the same circuits as the ACX301AK 2.0-inch 200K-dot color LCD. These internal circuits are all formed from low-temperature polysilicon TFTs, and thus this product achieves a power consumption of 50 mW when 12-V drive is used. Thus this product, through the use of low-power circuits, is a panel system that strives for even more ultralowpower consumption, which is a feature of reflective LCD panels that do not require a backlight.
Sony's Unique Reflective LCD Panel Technology
In addition to low-power technology, Sony has taken full advantage of the unique high picture quality technologies, including ECB* 1 mode, the RMP*2 structure, and the BDM*3 technology, all of which achieve improved brightness and higher contrast. This has resulted in the achievement of a reflection ratio of 28% and a contrast ratio of 19:1.
*1: Electrically Controlled Birefringence *2: Random Multi Profile *3: Birefringence Dispersion Matching
Related Products that Powerfully Support the ACX703AKM and the ACX300 Series
Sony provides two types of system as the ACX703AKM drive ICs to support customer needs. One is a two-chip structure based on existing driver ICs using the CXD2472R as the timing generator. (See figure 1.) The other is a single-chip structure based on the CXA3268R, and allows reduced space and a smaller number of components. (See figure 2.) These options allow customers to select a structure that fits their product designs. Both these drive ICs can also drive the ACX300AK, ACX301AK, and ACX302AK*4, which are transmissive panels. Sony is also releasing, at the same time, a backlight specially designed for use with the ACX301AK, which is a 2.0-inch 200K-dot transmissive panel. The ACX301AK backlight adopts a unified structure with the panel itself, and thus can achieve the light weight, small-sized, and low power that are optimal for digital still camera applications.
*4: See pages 22 and 23 for more information on the ACX300AK, ACX301AK, and ACX302AK.
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Sony has developed the reflective LCD of the ACX301AK . While the ACX703AKM, which takes full advantage of Sony's unique highperformance reflective LCD technology, is a high-resolution reflective LCD, this product is designed to achieve low power consumption. This device, along with Sony's drive ICs that support all types of application, form a powerful combination that is strongly differentiated from the competition. I strongly recommend that you look into this product.
Video signal (NTSC or PAL)
R
RGB drivers
G B
FRP, HDO VST, VCK, EN, DWN, WIDE, HST, HCK, RGT
LCD panels ACX703AKM ACX300AK ACX301AK ACX302AK
CSYNC
CXD2472R
FRP, BLK
Psig/Vcom Gen.
PSIG, VCOM
s Figure 1 ACX703AKM Drive System Block Diagram (Two-chip Structure)
s Photograph 1
Backlight Designed for Use with the ACX301AK
VDD POF* 3V
2
Video signal*1 (RGB or Y/color difference) (NTSC or PAL) CSYNC or HD, VD*1
R, G, B VST, VCK, EN, DWN, WIDE, HST, HCK, RGT
CXA3268R
PSIG, VCOM
LCD panels ACX703AKM ACX300AK ACX301AK ACX302AK
s Table 1
Item
ACX301AK Backlight Module Specifications
BL specifications 4200 nt 0.48 W Side light -- Module specifications 250 nt -- -- 50.2 x 43.6 x 5.8 t Wire Wire 9500K Approximately 8 g +0.5-mm pitch 24-pin flexible cable 6500K Approximately 21 g
SDAT, SCK, SEN
Center brightness Tube power Structure External dimensions Harness
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
TC Weight
s Figure 2 ACX703AKM Drive System Block Diagram (Single-chip Structure)
s Table 2
2.0-inch Reflective LCD Specifications
2.0-inch 200K-dot LCD 880 x 228 Delta arrangement 46 x 134 m 44.2 x 49.8 x 2.2 t 76% 28% 19:1 Whole panel 50 mW 230 mW (When a single chip structure is used)
Item Number of active pixels (H x V) Pixel arrangement Dot pitch Package dimensions Aperture ratio Reflection ratio Contrast Power consump- Whole tion system

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