A low‐power 262k‐color SOG (System‐On‐Glass) LCD has been developed for mobile applications. It is integrated with a DC‐DC converter and driver circuits that contain 6‐ bit DACs, and it consumes less than 5 mW in operations with a single voltage power supply of 2.5 V.
A system-on-glass (SOG) DRAM intended for integrated framememories of 262k-color QCIF+ displays has been developed. An integrated codec circuit reduces the number of memory cells and layout area by a factor of 2/3. By combining the SOG-DRAM, which has a data retention time of over 16.6 ms, with an embedded controller that enables simultaneous access for writing and reading, a frame-memory has been created. The operation was verified by chip measurement and demonstration.
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