Drive circuitry of display panel, and display device
AssigneesHkc Corporation Limited, Chongqing Hkc Optoelectronicstechnology Co., Ltd.
InventorsXiaoyu Huang, Chongwei Tang
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Abstract
This application provides a drive circuitry for a display panel and a display device. The drive circuitry includes a drive circuit board, a power chip, a driving chip, a detection circuit, and a control circuit. The detection circuit detects a logic voltage at a logic signal receiving terminal and outputs a control signal. The power terminal of the driving chip is coupled to the power chip through the control circuit. The control circuit controls to turn on or turn off the coupling between the power chip and the driving chip according to the control signal.
Claims18
A drive circuitry for a display panel, comprising:
- a drive circuit board, comprising a power chip thereon;
- a driving chip, comprising a power terminal and a logic signal receiving terminal, the driving chip being configured to receive a driving signal to drive the display panel;
- a detection circuit, configured to detect a logic voltage of the logic signal receiving terminal and output a control signal according to a magnitude of the logic voltage;
- and
- a control circuit,
- wherein the power terminal of the driving chip is coupled to a power output terminal of the power chip through the control circuit, the control circuit is configured to control to turn on or turn off a coupling between the power chip and the driving chip according to the control signal.
A drive circuitry for a display panel, comprising:
- a drive circuit board, provided with a power chip thereon;
- a driving chip, comprising a power terminal and a logic signal receiving terminal, the driving chip being configured to receive a driving signal to drive the display panel;
- a voltage comparison circuit, comprising a first comparator, a second comparator, and a detection switch, wherein the first comparator comprises a non-inverting input terminal coupled to the logic signal receiving terminal, an inverting input terminal coupled to the first preset voltage, and an output terminal coupled to a control terminal of the detection switch;
- wherein the voltage comparison circuit is configured to output the control signal based on magnitude relationships between a logic voltage of the logic signal receiving terminal with the first preset voltage and the second preset voltage;
- and
- a control circuit, wherein the power terminal of the driving chip is coupled to power output terminal of the power chip through the control circuit, the control circuit being configured to control to turn on or turn off the coupling between the power chip and the driving chip according to the control signal;
- wherein let an initial logic power supply voltage of the power chip be VDD, the first preset voltage be V1, and the second preset voltage be V2, then the first preset voltage and the second preset voltage satisfy the following formula:
- 0.3VDD≤V2<V1≤0.7VDD.
A display device, comprising a display panel and a driving circuitry of the display panel, the drive circuitry comprising:
- a drive circuit board, provided with a power chip thereon;
- a driving chip, comprising a power terminal and a logic signal receiving terminal, the driving chip being configured to receive a driving signal to drive the display panel;
- a detection circuit, configured to detect a logic voltage of the logic signal receiving terminal and output a control signal based on a magnitude of the logic voltage;
- and
- a control circuit, wherein the power terminal of the driving chip is coupled to power output terminal of the power chip through the control circuit, the control circuit being configured to control to turn on or turn off the coupling between the power chip and the driving chip according to the control signal.
Dependencies are inferred from the claim text.