Light emitting diode wristwatch with angular display

Details Light emitting diode wristwatch with angular display Light emitting diode wristwatch with angular display

1975-03-28

1976-08-17

Weldon, Ulysses

58 23R, G04C 300

Patent

active

039746372

ABSTRACT:
Disclosed is a solid state wristwatch having an active electro-optical display in the form of light emitting diodes. The display is mounted on one sloping side of a groove in a circular module frame and comprises a ceramic substrate having the display on one side and a large scale integrated circuit on the other. The angular orientation of the display coincides with the axis of an angularly oriented viewing window constructed so that the watch case shades at least part of the display. Viewing under bright daylight is enhanced and through ambient light responsive control of current to the display, battery energy under most viewing conditions is conserved.

REFERENCES:
patent: 3566602 (1971-03-01), Bergey et al.
patent: 3576099 (1971-04-01), Walton
patent: 3757511 (1973-09-01), Burgess et al.
patent: 3768247 (1973-10-01), Fujita
patent: 3800525 (1974-04-01), Bergey
patent: 3823551 (1974-07-01), Riehl
patent: 3849979 (1974-11-01), Tanji
patent: D225429 (1972-12-01), Vuilleumier
patent: D229213 (1973-11-01), Sasaki

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