Integrated composite semiconductor light-emitting display array having LED's and selectively addressable memory elements

A composite integrated circuit light-emitting display array comprising:

• a monolithic array of LED devices, each of said devices being adapted when energized to emit light observable from the front surface of said array, said monolithic array being constituted by a monolithic transparent GaP crystal, each of said LED devices constituting at least one diode having a separate p-n junction at which light is radiated, said junction being at the back surface of said crystal, said light being transmitted through said crystal for being observed at the front surface of said crystal;
• a monolithic integrated circuit array of selectively addressable independent memory circuit elements corresponding to and adapted for energizing respective ones of said LED devices, said integrated circuit array being adjacent the back surface of said crystal;
• and
• interconnection means sandwiched between said planar arrays for providing electrical interconnection between respective ones of said LED devices and said circuit elements at the back surface of the first-said array, said circuit elements being operable when addressed to selectively and independently energize said LED devices for causing emission of light observable from the front surface of the first-said array.