The Solar Powered Clip Watch is a concept design by Mac Funamizu. The clip watch is meant to look like a button to help it not look out of place on any outer garment or bag. The time is displayed on the screen briefly once the screen has been pressed.
The Industrial Designer Mac Funamizu felt this concept dealt with the issue of getting your hands out of your pockets, or even pulling back gloves and layers of sleeves to see the time on a normal watch. By having the watch on outer garments, like your coat, the time would just be a simple press away. Of course you will need to press the watch face to display the time, which could still get your hands cold! Many just use their mobile phone to display the time, but with the rise in popularity in touch screens, which often do not respond well to operation by gloved fingers, this clip watch could be an excellent solution.
Because the clip watch has been designed to go on the outer layers of clothes it can make use of the light around it at all times, instead of being hidden away under sleeves and such like. A solar panel is part of the screen, taking in the light and using it to power the watch, so no issues with running out of power or replacing batteries. The watch screen only displays the time for a few seconds when pressed, as this is usually all that is needed when checking the time. This helps to conserve energy while helping the illusion that the watch is just another button.
Source: Yanko Designs