Voltage control circuit and display device
By introducing a voltage control circuit into the display device, the problem of abnormal restart of the power management integrated circuit caused by voltage rebound during power failure is solved, stable display of the display panel is achieved, and display quality and user experience are improved.
CN120412453BActive Publication Date: 2025-09-12HKC CORP LTD
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Patent Information
- Application Number
- CN202510905802.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2045-07-02
AI Technical Summary
Technical Problem
In a display device, voltage rebound during power failure causes the power management integrated circuit to abnormally restart, thereby causing abnormal display or screen flickering on the display panel.
Method used
A voltage control circuit is used, including a first switch circuit, a power-on reset circuit, a comparison circuit and a switch control circuit. By detecting and controlling the supply voltage, the power management integrated circuit is ensured to remain in the off state during power-off to prevent abnormal restart.
Benefits of technology
This effectively prevents abnormal screen or screen flickering caused by abnormal power-on of the display panel, thereby improving the display quality and user experience of the display device.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention proposes a voltage control circuit and a display device, wherein the voltage control circuit includes a first switch circuit, a power-on reset circuit, a comparison circuit and a switch control circuit. The power-on reset circuit outputs a third level signal or a fourth level signal correspondingly when the power is turned on or off. The comparison circuit compares the supply voltage and outputs a fifth level signal or a sixth level signal correspondingly. The switch control circuit controls the on and off of the first switch circuit based on the level signals output by the power-on reset circuit and the comparison circuit. Through the cooperation of the power-on reset circuit, the comparison circuit and the switch control circuit, the power-off voltage can be detected. When a voltage rebound occurs during the power-off process, the first switch circuit can be effectively kept off to prevent the power management integrated circuit from restarting abnormally, thereby effectively preventing the display panel from abnormally powering on and causing screen abnormalities or flickering problems, thereby improving the display quality and user experience of the display device.
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