Microdisplay subsystem of a wireless handheld computer

A wireless handheld computer in a telephone handset form factor is being developed. The Communicator device contains a StrongArm SA-1110 microprocessor, and a high-resolution color microdisplay and a virtual image display system. The current optical system is based on a viewfinder style eyepiece. The system under development will have a flip out mirror, reducing the overall package size. The existing display is an analog 4-input 800 by 600 pixel device. The next generation display is an integrated digital display based on a sampled-ramp architecture. The processor interface uses a shadow frame buffer for efficient graphics memory access.