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High-Transmittance/Low-Power Transmissive Color 8.8 cm (3.5-type) 123K-Dot LCD Panel
ACX310AK
The 3.5-type color LCD panel is widely used as the monitor in digital video cameras. Sony has already released the 200K-dot ACX302BK as a highresolution low-temperature polycrystalline silicon TFT LCD. Now, to expand its lineup of LCD panels, Sony is releasing the 123K-dot ACX310AK, which provides the same functions as the ACX302BK.
s s 8.8 cm (3.5-type) 123K-dot LCD panel High transmittance (9.5%) achieved by lowtemperature polycrystalline silicon TFT technology Low power consumption: 50 mW (when a 12 V power supply is used) Analog full-color display Wide aspect ratio display function Up/down and/or right/left inversion functions
s s s s
Supports Flexible EndProduct Design
With the release of the ACX310AK 3.5type color LCD panel for digital video cameras in addition to the 200K-dot ACX302BK high-resolution panel, Sony now provides a lineup of two models in this type of product. This means that in the future, the user product line can be expanded using only low-temperature polycrystalline silicon TFT LCDs, thus increasing flexibility in end-product design. Additionally, the external panel dimensions were designed to match those of existing amorphous silicon TFT LCDs, thus flexibly supporting needs for changing the panel type.
High Transmittance Achieved
As a result of optimized pixel design using Sony's low-temperature polycrystalline silicon TFT technology, this device achieves the high aperture ratio of 80%. Furthermore, by adopting a new pixel structure, Sony was able to radically increase the optical transmittance over that provided by conventional amorphous silicon TFT LCD panels, achieving a value of 9.5% in the ACX310AK. (See table 1.)
Even Lower Power and Improved Ease of Use
By using unique Sony-developed circuit technology, Sony was able to achieve the lowest power for this class of panel in the ACX310AK. (See table 1.) Furthermore, by incorporating voltage stepup and negative voltage generation circuits in addition to the functions that have been provided in earlier products, the up/down and/or right/left inversion functions and the wide aspect ratio display functions, Sony was able to obviate the need for certain of the power-supply voltages previously provided externally to the panel. This improves the ease of use of this panel. (See figure 1.) Sony is now developing a new system-on-chip IC (the CXA3549R) that will integrate both timing generator and control functions on a single chip. This new single-chip IC will make drive circuit design significantly easier. (See figure 2.)
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With the release of the ACX310AK announced here in addition to the ACX302BK, Sony has expanded its lineup of 3.5-type color LCD panels. Furthermore Sony has already released 2.5type color LCD panels. I strongly recommend that you try these Sony low-temperature polycrystalline silicon TFT LCD panels. I am confident that these panels can provide product differentiation in your DVC products.
Horizontal level sifter and shift register
+12.0 V +12.0 V +3.0 V PSIG VDD SLVSG 1 F Zener diode RD4.3UM
COM
Buffer
Vertical shift register
Vertical shift register
RED
Cs
LC
Y/color difference R/G/B
GREEN BLUE COM Cext/Rext VDDG Rext Cext
New singlechip IC (CXA3549R)
HST HCK1 HCK2 VST VCK DWN EN RGT REF WIDE
LCD panel ACX310AK
Voltage step-up generation circuit Level shifter Negative voltage generation circuit
VSSG VSS 1 F Zener diode RD2.7UM
COM pad
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
s Figure 1 Panel Block Diagram
TESTL COM VST VCK EN DWN VDD VSS VDDG VSSG SLVSG WIDE HST REF TEST Cext/Rext HCK2 HCK1 PSIG GREEN RED BLUE RGT TESTR
s Figure 2 System Block Diagram
s Table 1 3.5-type Transmissive LCD Panel
Item Screen size Number of active dots (H x V) Screen aspect ratio Pixel arrangement Dot pitch Contrast ratio Supply voltage Display method Panel dimensions (W x H x t (mm)) Power consumption Number of colors (mW) (V) (m) Optical transmittance (%) ACX302BK 8.8 cm (3.5 type) 200K dots (880 x 228) 4:3 RGB delta 80 (H) x 231 (V) 8.8 200 : 1 12 NTSC/PAL 78.8 x 63.3 x 2.2 60 Analog full color ACX310AK 8.8 cm (3.5 type) 123K dots (560 x 220) 4.3 : 3 RGB delta 129 (H) x 229 (V) 9.5 200 : 1 12 NTSC/PAL 85.0 x 63.3 x 2.2 50 Analog full color

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