Method of making an electroluminescent display device with islands of light emitting elements

Claim 1

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate with each first electrical conductor forming a column; screen printing a plurality of spaced polymer dielectric islands overlying the first conductors, with each dielectric island corresponding to an individual light-emitting element; screen printing a plurality of spaced polymer light-emitting phosphor islands overlying the dielectrics; and screen printing a plurality of second electrical conductors overlying said polymer phosphor islands in a direction transverse the direction of the first conductors, with each of said second electrical conductors forming a row; whereby voltage excitation by the voltage supply across a selected first electrical conductor and second electrical conductor will cause light emission by the light-emitting element at the excited row-column intersection.

Claim 2

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate with each first electrical conductor forming a column; screen printing a plurality of spaced polymer dielectric islands overlying the first conductors, with each dielectric island corresponding to an individual light-emitting element; screen printing a plurality of spaced polymer light-emitting phosphor islands overlying the dielectrics; and screen printing a plurality of second electrical conductors overlying said polymer phosphor islands in a direction transverse the direction of the first conductors, with each of said second electrical conductors forming a row; whereby voltage excitation by the voltage supply across a selected first electrical conductor and second electrical conductor will cause light emission by the light-emitting element at the excited row-column intersection.

Claim 12

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate with each first electrical conductor forming a column, said first electrical conductors being parallel to each other and being formed of copper with large area portions corresponding to each light-emitting element and smaller area portions interconnecting the large area portions; screen printing a plurality of spaced polymer dielectric islands overlying the first electrical conductors, with each dielectric island corresponding to an individual light-emitting element and each of said dielectrics comprising a barium titanate layer; screen printing a plurality of spaced polymer light-emitting phosphor islands overlying the dielectrics with said phosphor comprising a phosphor polymer layer; screen printing a plurality of indium oxide polymer light-transmissive conductors overlying said phosphor; screen printing a plurality of second electrical conductors in parallel with each other and overlying said indium oxide polymer conductors in a directon that is perpendicular to the direction of the first electrical conductors, with each second electrical conductor forming a row, each of said second conductors comprising a conductive silver polymer ink and being formed with first portions defining window openings aligned with each dielectric and second portions interconnecting the first portions; whereby voltage excitation by the voltage supply across a selected first electrical conductor and second electrical conductor will cause light emission by the light-emitting element at the excited row-column intersection.

Claim 13

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate with each first electrical conductor forming a column, said first electrical conductors being parallel to each other and being formed of copper with large area portions corresponding to each light-emitting element and smaller area portions interconnecting the large area portions; screen printing a plurality of spaced polymer dielectric islands overlying the first electrical conductors, with each dielectric island corresponding to an individual light-emitting element and each of said dielectrics comprising a barium titanate layer; screen printing a plurality of spaced polymer light-emitting phosphor islands overlying the dielectrics with said phosphor comprising a phosphor polymer layer; screen printing a plurality of indium oxide polymer light-transmissive conductors overlying said phosphor; screen printing a plurality of second electrical conductors in parallel with each other and overlying said indium oxide polymer conductors in a directon that is perpendicular to the direction of the first electrical conductors, with each second electrical conductor forming a row, each of said second conductors comprising a conductive silver polymer ink and being formed with first portions defining window openings aligned with each dielectric and second portions interconnecting the first portions; whereby voltage excitation by the voltage supply across a selected first electrical conductor and second electrical conductor will cause light emission by the light-emitting element at the excited row-column intersection.

Claim 14

A method of making an electroluminescent display comprising a number of individual light-emitting elements in a selected formation and adapted for excitation from a voltage supply, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate; screen printing a plurality of spaced dielectric polymer islands overlying the first electrical conductors; screen printing spaced light-emitting phosphor polymer islands overlying the dielectrics; screen printing second electrical conductors overlying the phosphor islands and defining windows for enabling viewing of the phosphor; whereby voltage excitation by the voltage supply across the first electrical conductor and the second electrical conductor will cause light emission by the excited element.

Claim 15

A method of making an electroluminescent display comprising a number of individual light-emitting elements in a selected formation and adapted for excitation from a voltage supply, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate; screen printing a plurality of spaced dielectric polymer islands overlying the first electrical conductors; screen printing spaced light-emitting phosphor polymer islands overlying the dielectrics; screen printing second electrical conductors overlying the phosphor islands and defining windows for enabling viewing of the phosphor; whereby voltage excitation by the voltage supply across the first electrical conductor and the second electrical conductor will cause light emission by the excited element.

Claim 24

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate, said first electrical conductors comprising a copper layer; screen printing a plurality of spaced dielectric islands overlying the first electrical conductors, said dielectric islands comprising a polymer barium titanate layer; screen printing a plurality of spaced light-emitting phosphor islands overlying the dielectrics, said phosphor islands comprising a phosphor polymer layer; providing a light-transmissive electrically conductive layer overlying said phosphor, said light-transmissive electrically conductive layer comprising polymer indium oxide; providing a second electrical conductor overlying the light-transmissive layer and defining a window for enabling viewing of the phosphor islands, said second electrical conductor comprising a conductive silver polymer ink; whereby voltage excitation by the voltage supply across the first electrical conductor and the second electrical conductor will cause light emission by the excited element.

Claim 25

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing a plurality of first electrical conductors overlying a substrate, said first electrical conductors comprising a copper layer; screen printing a plurality of spaced dielectric islands overlying the first electrical conductors, said dielectric islands comprising a polymer barium titanate layer; screen printing a plurality of spaced light-emitting phosphor islands overlying the dielectrics, said phosphor islands comprising a phosphor polymer layer; providing a light-transmissive electrically conductive layer overlying said phosphor, said light-transmissive electrically conductive layer comprising polymer indium oxide; providing a second electrical conductor overlying the light-transmissive layer and defining a window for enabling viewing of the phosphor islands, said second electrical conductor comprising a conductive silver polymer ink; whereby voltage excitation by the voltage supply across the first electrical conductor and the second electrical conductor will cause light emission by the excited element.

Claim 29

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing an electrically non-conductive substrate; laminating said substrate with a copper foil layer; etching the copper foil layer to provide a plurality of first electrical conductors overlying the substrate with each first electrical conductor forming a column; screen printing a plurality of spaced barium titanate dielectric islands over the first conductors; screen printing a plurality of spaced phosphor polymer islands over the dielectric islands; screen printing an indium oxide transmissive conductor layer over said phosphor polymer islands; and screen printing an electrically conductive silver polymer ink over said indium oxide transmissive conductive layer to provide a plurality of second electrical conductors in a direction transverse the direction of the first conductors, with each of said second electrical conductors forming a row.

Claim 30

A method of making an electroluminescent display comprising a matrix of individual light-emitting elements in a row and column formation and adapted for excitation from a voltage supply which addresses the matrix, which comprises the steps of: providing an electrically non-conductive substrate; laminating said substrate with a copper foil layer; etching the copper foil layer to provide a plurality of first electrical conductors overlying the substrate with each first electrical conductor forming a column; screen printing a plurality of spaced barium titanate dielectric islands over the first conductors; screen printing a plurality of spaced phosphor polymer islands over the dielectric islands; screen printing an indium oxide transmissive conductor layer over said phosphor polymer islands; and screen printing an electrically conductive silver polymer ink over said indium oxide transmissive conductive layer to provide a plurality of second electrical conductors in a direction transverse the direction of the first conductors, with each of said second electrical conductors forming a row.