Designer Vadim Kibardin may still be looking for a manufacturer to produce his Black & White Clock, ( I doubt it as this post was originally written in 2009) but the idea is definitely worthy of serious consideration.
The four digit digital clock features OLED (Organic Light-Emitting Diode) lights that change from dark during the day to white at night for added visibility. Each figure has a self-contained power supply and independent touch sensitive control.
Powered by lithium-ion accumulators. 60 mm x 110 mm x 10mm each