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|Hitachi Releases HD66770/HD66771/HD667P00
Controller Driver Chip Set
for TFT Color LCDs in Mobile Phones, etc.
Tokyo, May 17, 2001--Hitachi, Ltd. (TSE: 6501) today announced the
HD66770/HD66771/HD667P00 graphics display LCD controller driver chip
set for TFT color LCD panels installed in digital mobile phones and
similar products. Sample shipments will begin in June 2001 in Japan.
Use of this chip set makes it possible to provide a 132 × 176-pixel large-screen display and 65,536-color display. In addition, an 8-color display mode is included for primary-color display as a means of reducing power consumption. This function enables current dissipation to be held down by halting unnecessary tone level power supply in 8-color display. As a result, power consumption, including the panel, has been held to the same low level as color STN LCD panel displays, at 5 mW for 65,536-color display and 3 mW for 8-color display.
To reduce power consumption during normal operation, a partial display function is provided that enables only a part of the screen display area to be driven. The upper and lower display areas can be driven independently, enabling display to be performed with a lower LCD drive duty*1. For example, when displaying seven lines of icons at the top of the screen and 17 message lines in the center, both displays can be driven at a duty of 1/24, reducing the TFT panel charge/discharge current.
A high-speed burst RAM function is incorporated for writing data to the display RAM, enabling processing to be performed at a maximum speed of 160 Mbps. This makes it possible to write large quantities of data, such as color image data, and to achieve high-speed display rewriting for moving picture display. Also provided is an external VSYNC synchronization function, especially useful for moving picture display, which allows photographic images to be displayed on an LCD screen in synchronization with a signal from a camera built into a mobile phone, for example, ensuring smooth image display.
Supported mounting methods are COG*2 mounting, in which the device is directly mounted face-down on the LCD glass, COF*3 mounting, in which the device is mounted face-down on a flexible film substrate, and custom TCP*4 mounting.
Hitachi plans to further expand the product lineup in the future to provide support for even larger screen sizes.
< Typical Applications >
Mobile phones handling e-mail and WWW content services
Mobile phones supporting high-speed data transfer (W-CDMA, GSM, etc.)
< Prices in Japan > (For Reference)
|WRITTEN BY Corporate Communications Division