Rohm Co Ltd exhibited home electric appliances and healthcare devices that use dye-sensitized photovoltaic (PV) cells as power sources at a trade show in Japan.
The company assumes that power is generated for those items by using illumination light instead of solar light.
This time, Rohm showcased a wall clock and an "ultraviolet ray meter," which determines the existence of ultraviolet ray, at Techno-frontier 2010, a trade show that runs from July 21 to 23, 2010, in Tokyo. Both of them are powered only by dye-sensitized PV cells.
In addition, the company displayed a "wearable pulse wave sensor" though its power source is a normal battery at this time. It measures pulse waveforms at a fingertip by using an infrared sensor and wirelessly sends them to a monitor.
Rohm said that TV remotes, cordless phones, music players, wireless computer mice, notebook PCs and digital cameras can possibly be charged by using illumination light. The company also said that it used dye-sensitized PV cells because their wide variety of colors make it easy to design electric appliances and they have optical absorption properties best suited for indoor lighting.