A paper-white chip-based display MCM package for portable IT products
1998
Recently we have developed a direct View reflective CMOS active matrix (AM) polymer dispersed (PD) liquid crystal (LC) display. A 3 mu m 15 V CMOS technology for the silicon backplane was chosen for its voltage compatibility with PDLC. The main features of this display ape: 1/16 VGA resolution, pixel size 80 mu m, response time suited for all video applications, integrated analog scanner circuits and fully integrated row drivers, a low cost back-end module for defining the pixel pads and light shielding, and a non-vacuum PDLC filling assembly technology.
A LVDS (low voltage differential signalling) link was chosen for the interfacing. Therefore a ceramic package was developed which contains the display chip plus other electronic components, including a LVDS receiver, a voltage step-up converter, a digital to analog converter and a video amplifier. This very simple interfacing (one 5V voltage supply and 3 signal pairs) and the low power consumption (750 mW) for the whole light weight package, makes this display system compatible with personal and mobile IT applications.
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