Display Panel Driving Circuit Voltage Difference Compensation
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Solution Overview
Problem
Conventional techniques for driving display panels result in significant voltage differences between sensing and dummy sensing circuits, leading to uncertainty and errors in signal processing.
Innovation Solution
The electronic device includes a processing circuit that receives signals from both sensing and dummy sensing circuits, with the dummy sensing circuits receiving signals related to the actual sensing lines, allowing for a reduction in the difference between sensing and dummy sensing results through a multiplexer circuit that time-divisionally outputs these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If dummy circuits are added next to function circuits with fixed voltage input terminals, then circuit layout completeness is improved, but voltage difference between dummy circuits and function circuits increases
Solution Approach 1:
The patent applies preliminary action by performing dummy sensing operations before actual sensing operations. The dummy sensing circuits are activated in advance to generate dummy sensing results that reflect the voltage state before function circuits are activated, allowing the system to capture and compensate for voltage differences proactively rather than reactively.
Solution Approach 2:
The patent implements feedback by using the dummy sensing results to adjust and compensate for voltage differences affecting the function circuits. The system continuously monitors the voltage state through dummy circuits and uses this information to correct deviations in the actual sensing circuits, creating a closed-loop control mechanism that maintains voltage stability.
2Ease of manufacture
If dummy sensing circuits are used with fixed voltage inputs, then circuit structure completeness is improved, but sensing accuracy deteriorates due to voltage difference
Solution Approach 1:
The patent uses copying by creating dummy sensing circuits that replicate the structure and characteristics of the actual sensing circuits. These dummy circuits serve as accurate copies that experience the same voltage conditions, allowing the system to measure and compensate for voltage effects without interfering with the actual sensing operation.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the reference voltage or compensation values based on the voltage state detected by dummy circuits. The system modifies operational parameters in real-time to compensate for voltage differences, thereby maintaining sensing accuracy despite the presence of voltage variations.
3Shape
If conventional dummy circuits with fixed voltage are used, then layout symmetry is improved, but signal processing reliability deteriorates
Solution Approach 1:
The patent transforms the static dummy circuit approach into a dynamic system where dummy sensing circuits are activated and deactivated in sequence with the actual sensing circuits. This dynamic operation allows the system to adapt to changing voltage conditions while maintaining the symmetric layout structure, improving signal processing reliability without sacrificing geometric symmetry.
Data Source
AI summary
An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a first input terminal, a first circuit and a second circuit. The first input terminal receives a first sensing signal from a first sensing line of the sensing lines of the display panel. The first circuit generates a first signal according to the first sensing signal and provides a processing circuit with the first signal during a pre-processing period. The second circuit generates a second signal according to the first sensing signal and provides the processing circuit with the second signal during a normal processing period after the pre-processing period.