Illuminating device for digital display wristwatches

Claim 1

An electronic timepiece comprising quartz crystal oscillator means producing a high frequency time standard signal; divider circuit means for producing a low frequency time signals in response to said high frequency time standard signals; liquid crystal display means for digital display of time; driving circuit means intermediate said divider circuit means and said liquid crystal display means for applying driving signals to said display means in response to said time signals applied thereto; a light source disposed proximate to said liquid crystal display means for illuminating same; a single power source for energizing said oscillator means, said divider means, said driving circuit means, and said light source; manually operable time correcting switches disposed externally to said electronic timepiece; switching circuit means adapted to selectively connect said time correcting switches to said divider circuit means when said switching circuit means is in a first mode for the selective correction of digital display of time by said time correcting switches, said switching circuit means being adapted to selectively connect at least one of said time correcting switches to said light source when said switching means is in a second mode for the selective actuation of said light source by said correcting switches; and control switch means connected to said switching circuit means for selecting one of said first and second modes.