Common Electrode Voltage Compensation Circuit for Display Crosstalk
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Solution Overview
Problem
Conventional compensation circuits for common electrode voltages in display devices are unable to promptly adjust to severe coupling effects between data lines and common electrodes, leading to issues like crosstalk and greenish display, which compromise the display quality.
Innovation Solution
A compensation circuit comprising a control module, selection module, transmission module, and output module that generates a control signal based on feedback and reference voltages to select an appropriate common electrode voltage signal for timely compensation, ensuring effective voltage adjustment during coupling events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If display device size and resolution are increased, then display quality is improved, but coupling capacitance between data lines and common electrodes increases causing crosstalk and greenish display
Solution Approach 1:
The patent applies preliminary anti-action by introducing a compensation circuit that proactively counteracts the coupling capacitance effect before it causes display defects. The circuit detects the voltage change on the common electrode caused by coupling capacitance and applies a compensating voltage in advance to prevent crosstalk and greenish display, thereby maintaining high display quality in large-resolution displays without requiring reduction of display device size or resolution.
2Reliability
If conventional compensation circuits are used, then some voltage compensation is provided, but the circuit cannot promptly adjust to severe coupling effects leading to crosstalk and greenish display
Solution Approach 1:
The patent applies dynamics by making the compensation circuit adaptive and responsive to real-time coupling conditions. The circuit dynamically adjusts the compensation voltage based on the actual voltage change detected on the common electrode, allowing it to promptly respond to severe coupling effects and transitions from slight to severe coupling. This dynamic adjustment mechanism ensures reliable compensation without compromising response speed, preventing crosstalk and greenish display even under severe coupling conditions.
Data Source
AI summary
A compensation circuit for a common electrode voltage and a display device. The compensation circuit includes a control module, a selection module, a transmission module and an output module. The control module generates a control signal and transmits the control signal to the selection module. The selection module selects one of a signal from a first common electrode voltage terminal, a signal from a second common electrode voltage terminal, a signal from a third common electrode voltage terminal and a signal from a fourth common electrode voltage terminal as an input signal based on the control signal and a signal from a turn-on voltage terminal, and transmits the input signal to the output module. The transmission module transmits the feedback signal received from the control module to the output module. The output module generates a compensation signal based on the feedback signal and the input signal.