Display Power Voltage Generator Feedback Compensation
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Solution Overview
Problem
Unstable initialization voltage in display panels leads to deteriorated display quality due to fluctuations in output current, causing image instability and defects.
Innovation Solution
A display apparatus with a power voltage generator that receives feedback initialization voltage and compensates it to maintain a stable initialization voltage, using an amplifier, input resistor, and output resistor configuration to adjust the voltage gain and slew rate, ensuring consistent pixel output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the initialization voltage is applied without feedback compensation, then the device complexity is reduced, but the stability of the initialization voltage deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the initialization voltage is monitored and fed back to the power voltage generator. The generator adjusts the initialization voltage based on the feedback signal to maintain stability. This resolves the contradiction by introducing feedback compensation that stabilizes the initialization voltage without excessively increasing device complexity.
2Stability of the object's composition
If feedback compensation is implemented, then the initialization voltage stability is improved, but the device complexity increases
Solution Approach 1:
The feedback compensation circuit monitors the initialization voltage and provides correction signals to the power voltage generator. This targeted feedback approach stabilizes the voltage while minimizing additional circuit complexity by focusing compensation only where needed in the initialization path.
Solution Approach 2:
The power voltage generator dynamically adjusts the initialization voltage parameter based on feedback signals. By changing the voltage parameter in response to detected variations, the system maintains stability without requiring complex circuit reconfiguration.
3Device complexity
If the initialization voltage level fluctuates, then the manufacturing precision is reduced, but the device complexity remains simple
Solution Approach 1:
The feedback mechanism detects fluctuations in initialization voltage that would affect pixel output current and display quality. By continuously monitoring and correcting these variations, the system maintains high manufacturing precision in the display output without requiring complex manufacturing processes.
Solution Approach 2:
The system dynamically adjusts the initialization voltage parameter to compensate for fluctuations. This parameter change ensures consistent pixel performance and display quality while keeping the overall device structure relatively simple.
Data Source
AI summary
A display apparatus includes a display panel, a data driver, and a power voltage generator. The display panel includes a plurality of pixels and configured to display an image. The data driver is configured to apply a data voltage to the display panel. The power voltage generator is configured to provide a power voltage and an initialization voltage to the display panel. The power voltage generator is configured to receive a feedback initialization voltage from the display panel and configured to compensate the initialization voltage based on the feedback initialization voltage.