Technology notes for a multi-touch device.

Screen Resolution

iPhone 320x480

new iPod 640x480

Wacom Cintiq 12WX 1600x1200

Touch resolution

Can be smaller than screen resolution

Newspaper-like UI

Magazines 133-150 lpi 200 dpi

Newspapers 85 lpi 150-200 dpi

High-quality book 200 lpi

Programming interfaces

Multitouch for Java

Qt 4.6 (Low-level and/or gesture events; not mature; LGPL)

Operating System support

Windows CE

Embedded Linux

Qt Embedded

Common technologies

E-paper (low resolution & refresh rate, no backlight needed)

OLED (expensive)

LCD (backlight needed)

Gesture support/pressure-sensing

Gesture support: need 2 points of contact

Pressure sensing: not needed

Overall suggestion of technology

LCD, capacitive touchscreen, Qt Embedded for software