This paper describes the development of a thermal energy watch. The Cal. 6C is the thermal energy watch that converts body heat into power. The watch has an ultra compact power generation system with a power generation monitoring function and a power saving function that gradually stops the hands when no power is generated. It also has a fully automatic perpetual calendar function valid through February 28, 2100.
New trans-reflective type display comprising two stacked liquid crystal cells with reflective polarizers has been developed. The first TN panel is operated as a "metal-shutter" which has transparent and specular states. The second TN panel displays information while the "metal-shutter" opens. The display provides a unique combination of attractive variation in design and excellent legibility. These characteristics allow the display to be used effectively in application to digital watches.
This paper describes a fiberprobe optical memory head with a coupled-cavity-laser configuration. The optical feedback efficiency was both theoretically and experimentally analyzed as a function of the clearance and the inclination angle of the probe to the recording-medium surface. The feedback efficiency was numerically estimated from the theoretical analysis for the various position conditions of the probe, and the estimation process was verified by the experiment assuming a light output proportional to the feedback efficiency. The experiment also confirmed that the data signal can be correctly detected in the on-track condition, and that high-sensitivity detection of tracking-error signals can be performed by a sampled-servo control method.