Abstract A small, pocket size, direct current flat electroluminescent display panel made of a single crystalline substrate having electroluminescent material on the front face and addressing circuitry on the back face. The addressing circuitry is conductively connected to the electroluminescent material through feedthrough holes in the substrate. The feedthrough holes are produced by electrons beams or laser beams, or by photo-etching techniques. The addressing circuitry may be, for example, metallic oxide semiconductors or thin film transistors. A large scale integrated thin film transistor circuit could be deposited into a matrix, from a multiple of evaporation sources, through a system of registered masks positioned on the back side of the substrate. The electroluminescent material may comprise a matrix of light emitting diodes, or alternatively a solid sheet of Group II-VI heterojunction sandwich structure. The matrix of light emitting diodes may be made of gallium arsenide phosphide materials that are in exact registration with the addressing circuitry and connected thereto by conductors connected through the feedthrough holes. Voltage pulses from shift registers in a predetermined pattern are applied to the matrix of addressing circuitry. Outputs from the addressing circuitry cause the electroluminescent material that is conductively connected thereto to conduct, providing a display in the predetermined pattern of the voltage pulses from the shift registers.
An electroluminescent display panel comprising: an insulating substrate having a matrix of feedthrough holes therethrough; a matrix of metallic oxide semiconductors having a gate, a drain, and a source electrode, said metallic oxide semiconductors positioned on a back side of said substrate; and a matrix of electroluminescent elements on a front side of said substrate wherein each of said drain electrodes is connected directly to one of said matrix of electroluminescent elements and said source electrodes are connected to column leads and said gate electrodes are connected to row leads whereby the outputs from shift registers trigger video information into said metallic oxide semiconductors according to information fed into said shift registers.
Claim 2
Dependent Claim
112 words
An electroluminescent display panel comprising: an insulating substrate having a matrix of feedthrough holes therethrough; a matrix of metallic oxide semiconductors having a gate, a drain, and a source electrode, said metallic oxide semiconductors positioned on a back side of said substrate; and a matrix of electroluminescent elements on a front side of said substrate wherein each of said drain electrodes is connected directly to one of said matrix of electroluminescent elements and said source electrodes are connected to column leads and said gate electrodes are connected to row leads whereby the outputs from shift registers trigger video information into said metallic oxide semiconductors according to information fed into said shift registers.
Claim 3
Dependent Claim
93 words
An electroluminescent display panel as set forth in claim 1 further comprising: a power source; and a matrix of storage transistors having a gate electrode, a drain electrode, and a source electrode wherein said drain electrode of each of said storage transistors is connected to one of said matrix of electroluminescent elements, and said source electrode of each of said storage transistors is connected to said power source, and said gate electrode of each of said storage transistors is connected to one of said drain electrodes of said matrix of metallic oxide semiconductors.
Claim 4
Dependent Claim
20 words
An electroluminescent display panel as set forth in claim 2 wherein said storage transistor is a metallic nitride oxide semiconductor.