Display Module Capacitor for Power Voltage Stability
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Solution Overview
Problem
Display panels experience signal crosstalk due to coupling capacitance between data and power lines, leading to fluctuations in power voltage, which affects the display effect and user experience.
Innovation Solution
A display module and integrated circuit that includes a capacitor electrically connected to power lines to offset variations in power voltage caused by data voltage fluctuations, mitigating the impact of coupling capacitance and improving power voltage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data lines and power lines are closely arranged to reduce routing complexity, then device complexity is reduced, but coupling capacitance increases causing power voltage fluctuations
Solution Approach 1:
A decoupling capacitor is introduced as an intermediary component between the power line and ground. This capacitor acts as a mediator that provides a dedicated path for high-frequency noise to ground, preventing the coupling capacitance between data and power lines from causing voltage fluctuations. The decoupling capacitor absorbs the harmful capacitive coupling effects while allowing the power line to remain closely routed with data lines.
2Ease of manufacture
If standard capacitor placement is used, then manufacturing is simple, but power voltage stability is insufficient to eliminate bright/dark lines at image intersections
Solution Approach 1:
The decoupling capacitor is strategically placed at specific locations where power lines intersect with data lines or where power voltage fluctuations are most pronounced. This local placement targets the harmful coupling capacitance effects at their source locations rather than using uniform distribution. The capacitor position is optimized to directly counteract the coupling effects causing bright/dark lines at image intersections while maintaining ease of manufacturing through standard PCB capacitor mounting processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the occurrence of bright or dark lines at image intersections, enhancing the display effect and user experience by stabilizing power voltage and minimizing signal crosstalk.
Implementation Method 1
there may be a coupling capacitance between a data line and a corresponding power line. When a data voltage on the data line jumps, a power voltage on the corresponding power line fluctuates synchronously as affected by the coupling capacitance
Data Source
AI summary
The present application discloses a display module, an integrated circuit and a display apparatus. The display module includes: a display panel including data lines and power lines; and a first capacitor electrically connected to one or more of the power lines, wherein the first capacitor is configured to at least partially offset a variation of a power voltage on each of the one of more power lines caused by a data voltage on a corresponding one of the data lines.