Digital electronic watch having calendar display arrangement

Abstract

An electronic watch is provided with means for digitally displaying time and date and day of the week by means of liquid crystal display elements. The display provides an indication of the second, minute and hour as well as an indication of whether it is morning or afternoon. The calendar display includes a plurality of liquid crystal display elements arranged in matrix form having seven columns each representing a day of the week and five rows each representing the weeks of the month. A plate having the days and dates of the month to be displayed is mounted on said liquid crystal element matrix by suitable means.

What is claimed is: 
     
       1. A digital electronic watch comprising a time standard oscillator for producing a high frequency time standard signal; circuit means for dividing said high frequency time standard signal into at least minute and hour display driving signals; liquid crystal display means for displaying time in response to said minute and hour driving signals; further circuit means for producing signals having a frequency of 1 pulse per day and 1 pulse per week from said first-mentioned circuit means; calendar display means including a matrix of liquid crystal elements having at least seven columns and a plurality of rows and means for sequentially actuating selected ones of said liquid crystal elements located at the intersection of an actuated row and an actuated column by sequentially actuating said columns in response to said signal having a frequency of 1 pulse per day and for sequentially actuating said rows in response to said signal having a frequency of 1 pulse per week. 
     
     
       2. A digital electronic watch as recited in claim 1, including switching means for the manual resetting of said means for applying actuating signals to said rows and columns for resetting said calendar display means. 
     
     
       3. A digital electronic watch as recited in claim 1, wherein said liquid crystal element matrix includes at least five rows. 
     
     
       4. A digital electronic watch as recited in claim 1, including overlay means dimensioned for registration with said liquid crystal element matrix and having the date and days of the week of the month to be displayed depicted thereon, and means for manually securing said overlay in registration with said matrix. 
     
     
       5. A digital electronic watch as recited in claim 1, wherein said minute and hour display means provide digital display of said minute and hour. 
     
     
       6. A digital electronic watch as recited in claim 5, including second display means, said second display means including six liquid crystal display elements, said first-mentioned circuit means being adapted to produce a 1-second signal, one of said six liquid crystal elements being actuated once each second in response to said 1-second signal, the other of said six liquid crystal elements being sequentially actuated in response to said 1-second signal at 10-second intervals. 
     
     
       7. A digital electronic watch as recited in claim 1, said watch including first switching means for selectively resetting said minute and hour display means, and second switching means for selectively resetting said means for actuating said columns and rows for resetting the calendar display means. .Iadd. 8. A digital electronic watch comprising a time standard oscillator for producing a high frequency time standard signal; circuit means for dividing said high frequency time standard signal into at least second, minute and hour display driving signals; digital display means for numerically displaying time in response to said minute and hour driving signals; and further display means for displaying seconds in response to said seconds driving signal, said seconds display means including a plurality of display elements, each said display element being representative of an increment of seconds and being sequentially actuated at least once at a predetermined interval of time, for each minute driving signal. .Iaddend. .Iadd. 9. A digital electronic watch as claimed in claim 8, wherein said predetermined interval of time is equal to sixty seconds divided by said number of further display elements. .Iaddend..Iadd. 10. A digital electronic watch as claimed in claim 8, wherein said plurality of display elements equals six. .Iaddend..Iadd. 11. A digital electronic watch as claimed in claim 9, wherein said plurality of display elements equals six. .Iaddend..Iadd. 12. An electronic watch as claimed in claim 8, wherein said further display means includes six elements, one of said elements being actuated once each second in response to said seconds driving signal and the remaining elements being sequentially actuated at an interval of time equal to ten seconds. .Iaddend..Iadd. 13. A digital electronic watch as claimed in claim 8, wherein said further display means includes six display elements, one of said display elements being energized once each second, the other of said six display elements being sequentially energized at ten second intervals. .Iaddend..Iadd. 14. A digital electronic watch as claimed in claim 8, wherein said numerical digital display means and said further display means are liquid crystal display elements. .Iaddend..Iadd. 15. A digital electronic watch as claimed in claim 12, wherein said numerical digital display means and said further display means are liquid crystal display elements. .Iaddend. .Iadd. 16. A digital electronic wristwatch as claimed in claim 9, having calendar display means including a matrix of display elements having at least seven columns and a plurality of rows, further circuit means coupled to said first-mentioned circuit means for producing signals having a frequency of one pulse per day and one pulse per week, and means for sequentially actuating selected ones of said display elements located at the intersection of an actuated row and actuated column by sequentially actuating said columns in response to said signal having a frequency of 1 pulse per day and for sequentially actuating said rows in response to said signal having a frequency of 1 pulse per week. .Iaddend. .Iadd. 17. A digital electronic timepiece as claimed in claim 16, wherein said matrix of display elements, said numerical display elements and said further display elements are liquid crystal elements. .Iaddend..Iadd. 18. A calendar display device comprising a time standard oscillator for producing a time standard frequency signal; circuit means for dividing said time standard frequency signal into lower frequency signals, and further circuit means in response to said lower frequency signals produced by said first-mentioned circuit means producing signals having a frequency of at least one pulse per day and one pulse per week, and a matrix of display elements having at least seven columns and a plurality of rows and means for sequentially actuating selected ones of said display elements located at the intersection of an actuated row and actuated column by sequentially actuating said columns in response to said signal having a frequency of one pulse per day and for sequentially actuating said rows in response to said signal having a frequency of one pulse per week. .Iaddend..Iadd. 19. A calendar display device as claimed in claim 18, wherein said matrix display elements are liquid crystals. .Iaddend.