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US 11,900,877 B2Granted
Organic light-emitting diode control circuit and display panel
AssigneeHkc Corporation Limited
InventorsRenjie Zhou, Haoxuan Zheng
Life of this patent
Estimating the term…
Abstract
An organic light-emitting diode control circuit includes an organic light-emitting diode, an input control module and a protection module. The input control module is enabled in response to a scan signal provided by the scan line, and controls an operation of the organic light-emitting diode based on a data signal provided by the data line. The protection module can detect the current passing through the organic light-emitting diode or voltage across the same, and control the input control module to cut off the power supply of the organic light-emitting diode when the current of the organic light-emitting diode or the voltage across the same is greater than a preset value.
Claims16
An organic light-emitting diode control circuit, comprising:
- an organic light-emitting diode;
- an input control module connected to a scan line, a data line and the organic light-emitting diode, wherein the input control module is enabled in response to a scan signal provided by the scan line, and the input control module controls an operation of the organic light-emitting diode based on a data signal provided by the data line;
- and
- a protection module connected to the organic light-emitting diode and the input control module, wherein the protection module is able to detect a current passing through the organic light-emitting diode or a voltage across the organic light-emitting diode, and controls the input control module to cut off power supply of the organic light-emitting diode when the current of the organic light-emitting diode or the voltage across the organic light-emitting diode is greater than a preset value;
- wherein the input control module comprises:
- a first transistor provided with a control terminal connected to the scan line, a first terminal connected to the data line, and a second terminal connected to a control terminal of a second transistor;
- the second transistor provided with a first terminal connected to a second terminal of a third transistor and a second terminal connected to a first pole of the organic light-emitting diode;
- the third transistor provided with a first terminal connected to a first power supply, wherein the protection module is connected to the control terminal of the first transistor or a control terminal of the third transistor, and the protection module indirectly controls the second transistor to cut off the power supply of the organic light-emitting diode by controlling the first transistor, or controls the third transistor to cut off the power supply of the organic light-emitting diode;
- an AND gate circuit comprising a first input terminal connected to the scan line, a second input terminal connected to the protection module and an output terminal connected to the control terminal of the first transistor through a first node;
- and
- a first NOT gate circuit connected to the first node and the control terminal of the third transistor,
- wherein the protection module controls the second transistor to cut off the power supply of the organic light-emitting diode by controlling the AND gate circuit to output a low-level signal.
9 more elements
A display panel comprising:
- a base substrate;
- and
- an organic light-emitting diode control circuit formed on the base substrate, comprising:
- an organic light-emitting diode;
- an input control module connected to a scan line, a data line and the organic light-emitting diode, wherein the input control module is enabled in response to a scan signal provided by the scan line, and the input control module controls an operation of the organic light-emitting diode based on a data signal provided by the data line;
- and
- a protection module connected to the organic light-emitting diode and the input control module, wherein the protection module is able to detect a current passing through the organic light-emitting diode or a voltage across the organic light-emitting diode, and controls the input control module to cut off power supply of the organic light-emitting diode when the current of the organic light-emitting diode or the voltage across the organic light-emitting diode is greater than a preset value;
- wherein the input control module comprises:
- a first transistor provided with a control terminal connected to the scan line, a first terminal connected to the data line, and a second terminal connected to a control terminal of a second transistor;
- the second transistor provided with a first terminal connected to a second terminal of a third transistor and a second terminal connected to a first pole of the organic light-emitting diode;
- the third transistor provided with a first terminal connected to a first power supply, wherein the protection module is connected to the control terminal of the first transistor or a control terminal of the third transistor, and the protection module indirectly controls the second transistor to cut off the power supply of the organic light-emitting diode by controlling the first transistor, or controls the third transistor to cut off the power supply of the organic light-emitting diode;
- an AND gate circuit comprising a first input terminal connected to the scan line, a second input terminal connected to the protection module and an output terminal connected to the control terminal of the first transistor through a first node;
- and
- a first NOT gate circuit connected to the first node and the control terminal of the third transistor,
- wherein the protection module controls the second transistor to cut off the power supply of the organic light-emitting diode by controlling the AND gate circuit to output a low-level signal.
12 more elements
Dependencies are inferred from the claim text.