Active matrix of an organic light-emitting diode display screen
AssigneeThales
InventorsThierry Kretz, Hugues Lebrun, Elisabeth Chuiton
Life of this patent
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Abstract
An active matrix for an organic light-emitting diode display screen, including: pixels arranged in rows and in columns, each pixel including, a pixel electrode capable of accommodating an organic light-emitting diode on the surface, and first and second current drivers connected to said pixel electrode, wherein the first and second current drivers each include a current control transistor connected between a supply voltage Vdd and said pixel electrode and at least a first switching transistor that controls a gate of said current control transistor.
Claims10
An active matrix for an organic light-emitting diode display screen, comprising:
- pixels arranged in rows and in columns, each pixel including,
- a pixel electrode capable of accommodating an organic light-emitting diode on the surface, and
- first and second current drivers connected to said pixel electrode, wherein the first and second current drivers each include,
- a current control transistor connected between a supply voltage Vdd and said pixel electrode, and
- at least a first switching transistor that controls a gate of said current control transistor,
- wherein said first switching transistor is connected between a column data line of the matrix and the gate of said current control transistor,
- a gate of the first switching transistor is connected to a row select line of the matrix, and
- source or drain electrodes of the first switching transistor and the current control transistor, and the pixel electrodes are disposed at a source-drain metal level, and the gate electrodes of the first switching transistor and the current control transistor are each disposed at a row select line of the matrix, on a gate metal level;
- each pixel is disposed between two row select lines of the matrix, with the first current driver disposed between a first of these two row select lines and the pixel electrode, said first row select line forming the gate of the first switching transistor of the first current driver and the second current driver is disposed between a second of these two row select lines and the pixel electrode, said second row select line forming the gate of the first switching transistor of the second current driver;
- a source-drain electrode of the current control transistors of the first and second current drivers is formed by a Vdd supply bus produced on the source-drain metal level, and the other source-drain electrode of the control transistors is formed by an excrescence of the pixel electrode on the source-drain metal level;
- and
- each column data line is disposed between two columns of pixels of the matrix and formed from said source-drain metal level and said gate metal level, said gate metal level being used along the pixel electrodes and said source-drain metal level being used in zones between said pixel electrodes where the first switching transistors of said first and second current drivers are disposed.
A display screen comprising:
- organic light-emitting diodes, each including an active matrix according to any one of the preceding claims.
Dependencies are inferred from the claim text.