Timepiece and chronometer with overlapping, separately driven analog and digital displays

Abstract

A timepiece and chronometer with a superimposed analog/digital display arrangement. The timepiece comprises a watch case with a back and a display area, a transparent crystal, an electrically-driven digital LCD display, a superimposed analog display comprising an hour hand, minute hand, and interior bezel, an electrical analog watch movement, and a digital display driver. The digital LCD display indicates passing seconds by incrementally displaying either digits 00 through 59 or digits 01 through 60 for one second each, either in dark numerals over a light background, or vice versa. The analog display is driven by an electrical watch movement located beneath the LCD display that comprises a battery, a timing standard, timing circuitry, a stem and crown assembly, and a hand moving assembly that extends upward through the center aperture of the LCD display and couples to the analog watch hands. The digital display driver, also located behind the LCD display, couples to the digital LCD display and comprises a second battery, a timing standard, and timing and display driving electronic components and circuitry. The analog movement and the digital display driver may share the same electrical ground, but otherwise are electrically isolated from one another.

Dependencies are inferred from the claim text.