AUTOMATIC LOCATION-DETECTING COMBINATION ANALOG AND DIGITAL WRISTWATCH

摘要

A wristwatch (10) having a 24-hour analog display, a 12-hour digital display (28), an LCD display (30, 36) of the current phase of the moon and of the local times of sunrise and sunset "the daylight/darkness ratio" (32, 34). The watch includes a microprocessor (40) that may be manually set to display local time and celestial information by entering actual longitude and latitude or by scrolling through an alphabetical listing of preprogrammed cities. The watch may also reset itself automatically via reception and interpretation of location-identifying radio frequency broadcasts, such as airport beacon and aircraft flight control VORs, or GPS, FM radio stations, and local cell phone transmitters (52).