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US 11,908,377 B2Granted
Repair pixel and display apparatus having the same
AssigneeSamsung Display Co., Ltd.
InventorsHai-Jung In, Sungmin Son, Jae-Jin Song
Life of this patent
Estimating the term…
Abstract
A repair pixel and a display apparatus including the repair pixel, the display panel including a repair pixel for a pixel row or a plurality of repair pixels for a pixel row so that repair may be performed using the repair pixel when a bad pixel occurs in the corresponding pixel row. The bad pixel is repaired using the repair pixel so that the yield of the display panel may be enhanced.
Claims19
A repair pixel comprising:
- a first transistor including a control electrode connected to a first node, an input electrode connected to a second node, and an output electrode connected to a third node;
- a second transistor including a control electrode configured to receive a write gate signal, an input electrode configured to receive a data voltage, and an output electrode connected to the first node;
- a third transistor including a control electrode configured to receive a reference gate signal, an input electrode configured to receive a reference voltage, and an output electrode connected to the first node;
- a fourth transistor including a control electrode configured to receive an initialization gate signal, an input electrode configured to receive an initialization voltage, and an output electrode connected to the third node;
- a fifth transistor including a control electrode configured to receive an emission signal, an input electrode configured to receive a first power voltage, and an output electrode connected to the second node;
- a sixth transistor including a control electrode configured to receive the emission signal, an input electrode connected to the third node and an output electrode connected to a repair line;
- and
- an initialization capacitor including a first electrode connected directly to the third node and a second electrode configured to receive the initialization voltage.
5 more elements
A repair pixel comprising:
- a first transistor including a control electrode connected to a first node, an input electrode connected to a second node, and an output electrode connected to a third node;
- a second transistor including a control electrode configured to receive a write gate signal, an input electrode configured to receive a data voltage, and an output electrode connected to the first node;
- a third transistor including a control electrode configured to receive a reference gate signal, an input electrode configured to receive a reference voltage, and an output electrode connected to the first node;
- a fourth transistor including a control electrode configured to receive an initialization gate signal, an input electrode configured to receive an initialization voltage, and an output electrode connected to the third node;
- a fifth transistor including a control electrode configured to receive an emission signal, an input electrode configured to receive a first power voltage, and an output electrode connected to the second node;
- a sixth transistor including a control electrode configured to receive the emission signal, an input electrode connected to the third node and an output electrode connected to a repair line;
- a storage capacitor including a first electrode connected to the first node and a second electrode connected to the third node;
- and
- a hold capacitor including a first electrode configured to receive the first power voltage and a second electrode connected to the third node,
- wherein when the reference voltage is VREF, a threshold voltage of the first transistor is VTH, the data voltage is VDATA, a capacitance of the storage capacitor is CST, a capacitance of the hold capacitor is CHOLD, and a voltage of the third node in the third duration is VS,
- VS
- =
- (
- VREF
- -
- VTH
- )
- +
- CST
- CST
- +
- CHOLD
-
- (
- VDATA
- -
- VREF
- )
- is satisfied.
26 more elements
A repair pixel comprising:
- a first transistor including a control electrode connected to a first node, an input electrode connected to a second node, and an output electrode connected to a third node;
- a second transistor including a control electrode configured to receive a write gate signal, an input electrode configured to receive a data voltage, and an output electrode connected to the first node;
- a third transistor including a control electrode configured to receive a reference gate signal, an input electrode configured to receive a reference voltage, and an output electrode connected to the first node;
- a fourth transistor including a control electrode configured to receive an initialization gate signal, an input electrode configured to receive an initialization voltage, and an output electrode connected to the third node;
- a fifth transistor including a control electrode configured to receive an emission signal, an input electrode configured to receive a first power voltage, and an output electrode connected to the second node;
- a sixth transistor including a control electrode configured to receive the emission signal, an input electrode connected to the third node and an output electrode connected to a repair line;
- a storage capacitor including a first electrode connected to the first node and a second electrode connected to the third node;
- and
- a hold capacitor including a first electrode configured to receive the first power voltage and a second electrode connected to the third node,
- wherein when the reference voltage is VREF, the data voltage is VDATA, a capacitance of the storage capacitor is CST, a capacitance of the hold capacitor is CHOLD, a mobility of the first transistor is μ, a capacitance per a unit area of the first transistor is Cox, a width to length ratio of the first transistor is W/L, and a source-drain current of the first transistor in the fifth duration is IDS,
- IDS
- =
- 1
- 2
-
- uCox
-
- W
- L
-
- (
- CHOLD
- CST
- +
- CHOLD
-
- (
- VDATA
- -
- VREF
- )
- )
- 2
- is satisfied.
31 more elements
A display apparatus comprising:
- a display panel including a normal pixel and a repair pixel;
- a gate driver configured to apply a gate signal to the normal pixel and the repair pixel;
- a data driver configured to apply a data voltage to the normal pixel and the repair pixel;
- and
- an emission driver configured to apply an emission signal to the normal pixel and the repair pixel,
- wherein the repair pixel comprises:
- a first transistor including a control electrode connected to a first node, an input electrode connected to a second node, and an output electrode connected to a third node;
- a second transistor including a control electrode configured to receive a write gate signal, an input electrode configured to receive the data voltage, and an output electrode connected to the first node;
- a third transistor including a control electrode configured to receive a reference gate signal, an input electrode configured to receive a reference voltage, and an output electrode connected to the first node;
- a fourth transistor including a control electrode configured to receive an initialization gate signal, an input electrode configured to receive an initialization voltage, and an output electrode connected to the third node;
- a fifth transistor including a control electrode configured to receive the emission signal, an input electrode configured to receive a first power voltage, and an output electrode connected to the second node;
- a sixth transistor including a control electrode configured to receive the emission signal, an input electrode connected to the third node, and an output electrode connected to a repair line;
- and
- an initialization capacitor including a first electrode connected directly to the third node and a second electrode configured to receive the initialization voltage.
11 more elements
Dependencies are inferred from the claim text.