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US 12,217,683 B2Granted
Sub-pixel and display device including the same
AssigneeSamsung Display Co., Ltd.
InventorsJoon Chul Goh, Sang Hyun Heo
Life of this patent
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Abstract
Provided herein is a sub-pixel including first to seventh transistors, first and second capacitors, and a light emitting element, and a display device including the sub-pixel. A body terminal of the first transistor is connected to a first power line. In the sub-pixel and the display device including the sub-pixel in accordance with embodiments of the present disclosure, mitigation of the body effect may lead to an improvement in display quality.
Claims19
A sub-pixel, comprising:
- a light emitting element including a first electrode, a second electrode, and an emission layer provided between the first electrode and the second electrode;
- a first transistor including a gate terminal electrically connected to a first node, a drain terminal electrically connected to a second node, a body terminal to which a first power voltage is applied, and a source terminal;
- a second transistor that switches electrical connection between a third node and a data line to which a data voltage is applied;
- a third transistor that switches electrical connection between the first node and the second node;
- a fourth transistor that switches electrical connection between the second node and the first electrode of the light emitting element;
- a fifth transistor that is electrically connected to the first electrode of the light emitting element, and supplies an initialization voltage to the first electrode of the light emitting element;
- a sixth transistor that applies a reference voltage to the third node in response to a scan signal;
- a seventh transistor that switches electrical connection between the source terminal of the first transistor and a first power line to which the first power voltage is applied;
- a first capacitor including a first electrode connected to the first node, and a second electrode connected to the third node;
- and
- a second capacitor including a first electrode connected to the first node, and a second electrode to which the reference voltage is applied.
8 more elements
A display device, comprising:
- a display panel on which a plurality of sub-pixels are disposed, a plurality of data lines electrically connected to the plurality of sub-pixels and extending in a first direction are disposed, and a plurality of scan lines and a plurality of emission lines electrically connected to the plurality of sub-pixels and extending in a second direction are disposed;
- a data driving circuit that supplies data voltage to the plurality of data lines;
- a scan driving circuit that supplies a first scan signal, a second scan signal, a third scan signal and a fourth scan signal to the plurality of scan lines;
- and
- a power supplying circuit that supplies a first power voltage, a second power voltage, a third power voltage, and a fourth power voltage to the plurality of sub-pixels,
- wherein one of the plurality of sub-pixels comprises:
- a light emitting element including a first electrode, a second electrode, and an emission layer provided between the first electrode and the second electrode;
- a first transistor including a gate terminal electrically connected to a first node, a drain terminal electrically connected to a second node, a body terminal to which a first power voltage is applied, and a source terminal;
- a second transistor that receives the data voltage in response to the first scan signal, and switches electrical connection between a third node and a corresponding one of the plurality of data lines to which the data voltage is applied;
- a third transistor that switches electrical connection between the first node and the second node;
- a fourth transistor that switches electrical connection between the second node and the first electrode of the light emitting element;
- a fifth transistor that is electrically connected to the first electrode of the light emitting element, and supplies third power voltage to the first electrode of the light emitting element;
- a sixth transistor that applies the fourth power voltage to the third node in response to the second scan signal;
- a seventh transistor that switches electrical connection between the source terminal of the first transistor and a first power line to which the first power voltage is applied;
- a first capacitor including a first electrode connected to the first node, and a second electrode connected to the third node;
- and
- a second capacitor including a first electrode connected to the first node, and a second electrode to which the fourth power voltage is applied.
14 more elements
Dependencies are inferred from the claim text.