Large GaAsP monolithic XY addressable LED arrays for continuous matrix displays

The purpose of this work was to fabricate large junction-isolated monolithic XY addressable LED arrays in GaAsP for use in continuous matrix displays. This work represents a significant advance over the current state of the art. Monolithic junction-isolated arrays have been fabricated incorporating two-level metal interconnections to form an XY addressable LED array. Each monolithic chip contains a 30 × 36 array (1080 LEDs), The LEDs are 0.005" square and are placed on 0.014" centers. Four of these monolithic array chips have been assembled side by side to form a continuous matrix display (4320 LEDs). This display has been used to display 32 α-N characters, 2 rows of 16 characters, using a 7 × 9 format in a 9 × 15 field which permits upper and lower case characters as well as some graphic information.