Gate Driving Circuit Feedback Voltage Compensation
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Solution Overview
Problem
Existing display devices face challenges in detecting errors and compensating for changes in the gate driving circuit, which can lead to degradation and reduced lifespan, particularly due to the variability in characteristic values of transistors within the circuit.
Innovation Solution
A display device and driving circuit configuration that includes a power management circuit to supply a compensating high-potential gate voltage based on feedback voltage, using a feedback circuit and high-potential gate voltage compensation circuit to extend the lifespan of the gate driving integrated circuit, while also detecting errors through level changes in the gate voltage and utilizing a dummy channel to minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the gate driving circuit is simplified to reduce its size, then the device complexity is reduced, but the reliability decreases due to increased error possibility
Solution Approach 1:
The patent introduces a feedback mechanism where the gate driving circuit outputs a feedback signal to the timing controller. This feedback signal contains information about the circuit's operational status, allowing the timing controller to detect errors and monitor circuit health without requiring complex additional circuitry within the gate driving circuit itself.
Solution Approach 2:
The timing controller serves as an intermediary between the gate driving circuit and the external control system. It receives feedback signals from the gate driving circuit, processes this information, and provides appropriate control responses, thereby enabling error detection without increasing the complexity of the gate driving circuit.
2Adaptability or versatility
If transistors with different characteristic values are used in the gate driving circuit, then the adaptability is improved, but the reliability decreases due to degradation and lifespan limitations
Solution Approach 1:
The feedback signal from the gate driving circuit provides continuous information about transistor performance and circuit operation. This enables the timing controller to monitor for degradation trends and adjust operations accordingly, extending the effective lifespan of the circuit despite variations in transistor characteristics.
Solution Approach 2:
The system performs preliminary monitoring and detection of potential degradation through the feedback mechanism. By detecting changes in circuit characteristics early, the system can take preventive actions to maintain reliable operation before failures occur, thereby extending lifespan despite transistor variability.
Data Source
AI summary
A display device can include a display panel having a plurality of subpixels; a gate driving circuit configured to supply a plurality of scan signals to the display panel through a plurality of gate lines, and output a feedback voltage; a data driving circuit configured to supply a plurality of data voltages to the display panel through a plurality of data lines; a power management circuit configured to supply a plurality of driving voltages to the gate driving circuit and the data driving circuit, and supply a compensating high-potential gate voltage to the gate driving circuit based on the feedback voltage transferred from the gate driving circuit. The display device can further include a timing controller configured to control the gate driving circuit, the data driving circuit, and the power management circuit.