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US 11,694,618 B2Granted
Pixel driving circuit and display panel
AssigneeShenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorYan Xue
Life of this patent
Estimating the term…
Abstract
A pixel driving circuit and a display panel are provided, and adopt a pixel driving circuit of 5T1C structure to effectively compensate the threshold voltage of the driving transistor in each pf the pixels. The pixel driving circuit can effectively reduce leakage power consumption of a pixel driving circuit when extracting a threshold voltage, thereby improving compensation accuracy of the pixel driving circuit.
Claims18
A pixel driving circuit, comprising:
- a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a capacitor, and a light emitting element;
- wherein a gate of the first transistor is electrically connected to a first node, a source of the first transistor is electrically connected to a second node, and a drain of the first transistor is connected to receive a power voltage;
- wherein a gate of the second transistor is connected to receive a first scanning signal, a source of the second transistor is connected to receive a data signal, and a drain of the second transistor is electrically connected to the first node;
- wherein a gate of the third transistor is connected to a second scanning signal, a source of the third transistor is connected to receive a reference signal, and a drain of the third transistor is electrically connected to the second node;
- wherein a gate of the fourth transistor is connected to receive a readjusting signal, a source of the fourth transistor is connected to receive a reset signal, and a drain of the fourth transistor is electrically connected to the first node;
- wherein a gate of the fifth transistor is connected to receive a control signal, a source of the fifth transistor is electrically connected to the second node, and a drain of the fifth transistor is electrically connected to an anode of the light emitting element;
- wherein a first end of the capacitor is electrically connected to the first node, and a second end of the capacitor is electrically connected to the second node;
- wherein the anode of the light emitting element is electrically connected to the drain of the fifth transistor, and a cathode of the light emitting element is grounded;
- and
- wherein the first transistor is a driving transistor, the gate of the first transistor is connected to the source of the first transistor via the capacitor, and the drain of the third transistor is connected to the second end of the capacitor via the second node.
7 more elements
A display panel comprising a pixel driving circuit, wherein the pixel driving circuit comprises:
- a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a capacitor, and a light emitting element;
- wherein a gate of the first transistor is electrically connected to a first node, a source of the first transistor is electrically connected to a second node, and a drain of the first transistor is connected to receive a power voltage;
- wherein a gate of the second transistor is connected to receive a first scanning signal, a source of the second transistor is connected to receive a data signal, and a drain of the second transistor is electrically connected to the first node;
- wherein a gate of the third transistor is connected to receive a second scanning signal, a source of the third transistor is connected to receive a reference signal, and a drain of the third transistor is electrically connected to the second node;
- wherein a gate of the fourth transistor is connected to receive a readjusting signal, a source of the fourth transistor is connected to a reset signal, and a drain of the fourth transistor is electrically connected to the first node;
- wherein a gate of the fifth transistor is connected to receive a control signal, a source of the fifth transistor is electrically connected to the second node, and a drain of the fifth transistor is electrically connected to an anode of the light emitting element;
- wherein a first end of the capacitor is electrically connected to the first node, and a second end of the capacitor is electrically connected to the second node;
- wherein the anode of the light emitting element is electrically connected to the drain of the fifth transistor, and a cathode of the light emitting element is grounded;
- and
- wherein the first transistor is a driving transistor, the gate of the first transistor is connected to the source of the first transistor via the capacitor, and the drain of the third transistor is connected to the second end of the capacitor via the second node.
7 more elements
Dependencies are inferred from the claim text.