×

Planar alphanumeric display

  • US 4,291,307 A
  • Filed: 03/19/1979
  • Issued: 09/22/1981
  • Est. Priority Date: 03/19/1979
  • Status: Expired due to Term
First Claim
Patent Images

1. A plural character alphanumeric display, in which said display is comprised of two panels in spaced superimposed relationship with an optical medium therebetween, and said characters comprise complementary arrays of conductive segments at plural character locations on both said panels in aligned superimposed relationship adapted to be driven in a pattern by the application of a voltage to selected segments on both of said panels, the invention wherein each of said characters is comprised of a plurality of segments including a first group of segments forming the periphery of the character and a second group of segments radially disposed within the character, there being a like number of segments in each group, and wherein on a first of said panels the segments of the first group of each character are connected for driving connection to a voltage source, and the segments of the second group of each character are connected for driving connection to a voltage source, with the connection from both groups from each character being in multiple with the conductors from the like group of said other characters, and in which on the other panel, the segments of each character are paired with the segment of each pair being in alignment with separate groups within the character and each pairing is connected to a like pairing of the remaining characters for multiplexing of characters in a two step sequence by selective driving of selected pairings simultaneously with selective driving of the first and second groups of respective successive characters to illuminate selected alphanumeric characters at each of said locations.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×