US 4,540,292 A · Electronic calendar display

Abstract

An electronic calendar display in which each column always corresponds to a particular day of the week is disclosed. Each display element in each column includes a group of display segments which are selectively activated to display a number corresponding to a day of the month. Seven display elements are used to form a row representing a week, and six such rows may be arranged to represent an entire month. In addition, twelve month displays may be arranged to represent a year. The circuitry which updates the display segments includes a look-up table stored in a read-only memory which indicates the display segments to be activated for the current month and year. In the preferred embodiment, this circuitry also includes a microprocessor and the display includes alphanumeric display elements which can display a message. A keyboard or other interface permits an operator to enter the message. A watch is used to provide an indication of the current time and to signal when the display should be updated. In addition, the operator may push buttons to change the calendar data displayed.

Claims35

Dependent claims

A device for displaying calendar data, comprising:

a display for displaying data, comprising a first plurality of rows of discrete display elements, each display element in each row being in a respective column, each column always displaying a particular day of the week which is unique to that column such that each respective column always displays the same day of the week even when the data being displayed is changed by an updating circuit, each display element being selectively activable to display one of a plurality of date symbols, each date symbol representing a day of a month, the rows being arranged parallel to each other for displaying the calendar weeks of a month;
and
said updating circuit being for updating said display and for selectively activating the display elements to display the date symbols representing the days of each calendar week of the current month in a respective row and to display the date symbol representing each day of the current month in the column always displaying the day of the week on which that day falls, said updating circuit further being for automatically updating said display at the end of each current month to display the date symbols corresponding to the days of the following month.

Dependencies are inferred from the claim text.

Electronic calendar display

Life of this patent

Electronic calendar display

Life of this patent

Abstract

Claims35