Back to results
US 9,805,651 B2Granted
Organic light emitting display apparatus
AssigneeSamsung Display Co., Ltd.
InventorYang-Wan Kim
Life of this patent
Estimating the term…
Abstract
An organic light-emitting display apparatus includes a pixel circuit, a light emitter, an initialization transistor, and a coupling capacitor. The pixel circuit outputs a driving current to a node based on a data signal. The light emitter emits light based on the driving current at the node. The initialization transistor outputs an initial voltage to the node based on a first control signal received through a first control line. The coupling capacitor is between the node and the first control line.
Claims14
An organic light-emitting display apparatus, comprising:
- a pixel circuit to output a driving current to a node based on a data signal;
- a third control line to carry a third control signal;
- a light-emitter to emit light based on the driving current at the node;
- an initial voltage source providing an initial voltage that is lower than a threshold voltage of the light-emitter;
- a transistor having a first electrode that is connected to the initial voltage source, to output the initial voltage to the node which lowers the electric potential at the node to adjust the driving current of the light-emitter, based on a first control signal received through a first control line;
- and
- a coupling capacitor coupled to the node and the first control line, wherein the first control line is coupled to a gate electrode of the transistor and wherein the coupling capacitor is directly coupled between the gate electrode and one of the source electrode or the drain electrode of the transistor,
- wherein the pixel circuit includes:
- a driving transistor having a first electrode to receive a first driving voltage, a gate electrode, and a second electrode connected to the node;
- and
- a switching transistor having a first electrode to receive the data signal and a second electrode directly connected to the first electrode of the driving transistor, wherein the driving transistor is to supply the driving current corresponding to the data signal to the light-emitter according to a switching operation of the switching transistor,
- and wherein the third control line is connected to a gate electrode of the switching transistor and the switching operation of the switching transistor is to be performed corresponding to the third control signal received through the third control line.
9 more elements
An organic light-emitting display apparatus, comprising:
- a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels, wherein each of the first through third sub-pixels includes:
- a pixel circuit to output a driving current to a node based on a data signal;
- a third control line to carry a third control signal;
- a light-emitter to emit light based on the driving current at the node;
- an initial voltage source providing an initial voltage that is lower than a threshold voltage of the light-emitter;
- a transistor having a first electrode that is connected to the initial voltage source, to output the initial voltage to the node which lowers the electric potential at the node to adjust the driving current of the light-emitter, based on a first control signal carried through a first control line, wherein the first control line is coupled to a gate electrode of the transistor and wherein at least one of the first through third sub-pixels includes a coupling capacitor coupled to the node and the first control line and directly coupled between the gate electrode and one of the source electrode or the drain electrode of the transistor, and
- wherein the pixel circuit includes:
- a driving transistor having a first electrode to receive a first driving voltage, a gate electrode, and a second electrode connected to the node;
- and
- a switching transistor having a first electrode to receive the data signal and a second electrode directly connected to the first electrode of the driving transistor, wherein the driving transistor is to supply the driving current corresponding to the data signal to the light-emitter according to a switching operation of the switching transistor,
- and wherein the third control line is connected to a gate electrode of the switching transistor and the switching operation of the switching transistor is to be performed corresponding to the third control signal received through the third control line.
8 more elements
Dependencies are inferred from the claim text.