ACX318 SONY | Alldatasheet

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Providing a full product line requires ramping up production for multiple products at the same time and thus we had to make un- reasonable demands on everyone involved. While it was difficult to achieve low-voltage drive without sacrificing the optical transmit- tance and narrow frame design advantages, I am confident we have created products that will be more than satisfactory. The monitor is the face the camera presents to the user. Give Sony’s “beautiful faces” a try in your digital camera products. Digital Camera LCD Product Line Features Low Power and Digital Interface Support ACX318/319/320/321/324 Sony has now completely revamped its LCD lineup to respond to the increasingly rapid growth in the digital camera market. These displays retain the 100% ratio viewing area and high picture quality of earlier Sony LCDs and at the same time achieve signifi- cantly lower power and digital interface support. This new product line contributes to increased end product design efficiency by providing a wide range of drive options and allowing the use of common drivers. I Low-temperature polycrystalline silicon LCD I High color purity I Low power I Digital interface support I Adjustment free (digital interface) I Narrow frame, thin form factor I Use of the same driver for multiple panels I Ratio viewing area: 100% Low Power Sony has reduced the supply voltage from 12 V to 8.5 V and achieved significant power reduction in these LCD panels by switching from the conventional COM DC drive to COM AC drive. (See figures 1 and 2.) Digital Interface Support The advantages of switching to digital include obviating the need for D/A converters, lower noise, and adjustment- free manufacturing. Of course, these prod- ucts also support use with a conventional analog interface. Extensive Lineup Since these products form an extensive product line in terms of both pixel counts and screen sizes, they can respond flexibly to differing end product sizes and concepts. (See figure 3.) Sony is also planning to expand this product line even further. Use of the Same Driver for Multiple Panels This extensive lineup allows drive using the same driver, even for the EVF prod- ucts. (See figure 4.) The CXM4006 is used with digital interface applications, and the CXM3005 is used with analog interface applications. Sony provides the digital drive CXM4007 for compatible drive with EVF units, and since only one driver is required, power consumption, space, and costs are reduced. Thinner Form Factor Sony has introduced thinner light guide plates, has actively promoted revised backlight structures, and has even introduced glass etching. Thinner form factors is another area where Sony leads the industry. (See figure 5.) For example, the ACX318ELN features a module thick- ness, including the backlight, of only 2.685 mm, the top level in the industry. Ratio Viewing Area: 100% In digital cameras it is critically important both when composing and taking images as well as when reviewing images to be able to see the whole image without any part being left out. All these panels sup- port the implementation of 100% ratio viewing area displays and viewfinders. High Color Purity The color filters are manufactured inter- nally by ST Liquid Crystal Display Corp., which manufactures the panels. This al- lows each color to be designed optimally for the panel, making high color purity color reproduction possible. Narrow Frames COG-less drive based on low-temperature polycrystalline silicon fabrication allows these panels to have extremely narrow frames. This is a particularly attractive feature for the design of digital cameras, in which smaller models with larger LCD monitors are now desired. Up/Down and/or Right/Left Inversion Functions Since these panels support up/down and/ or right/left inversion functions controlled with serial signals only, they provide increased design flexibility in, for example, digital cameras with a rotating monitor.

I Figure 2 Power Consumption Comparison (Example) I Figure 1 Low Power Principles I Figure 3 Extensive Lineup I Figure 5 Trend Towards Thinner 1.5-type PanelsI Figure 4 Using the Same Driver COM AC signal Video signal White Black Black White COM DC signal Video signal White Black Black White 12 V 0 V 8.5 V 0 V Conventional Drive Low-Power Drive *: The figure presents a rough overview of these signals. *: This data does not include the backlight. 100 150 200 250 Conventional Specifications Low-Power Specifications 150 LCD IC 205 mW 100 mW Power consumption (mW) 1.5 type 1.8 type 2.0 type 2.5 type (dots) 78K ACX321 ACX332 118K ACX318 ACX320 ACX324 235K ACX319 ACX330 Under development 78K dots LCD panel 235K dots CXM4006 (Digital interface) or CXM3005 (Analog interface) 118K dots EVF panel 235K dots *: Sony provides a compatible driver for both EVF and LCD drive. DSP Fck = 27/24 MHz 118K dots 4.0 mm 3.0 mm 3.5 mm 2.5 mm 2001 2002 2003 3.9 mm 2.98 mm 2.685 mm ACX318ELN (year)

  • Introduction of thin-form light guides
  • Structural analysis of backlight systems
  • Glass etching