Timing Controller Dynamic Voltage Swing Adjustment for EMI Reduction
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Solution Overview
Problem
High electromagnetic interference (EMI) from electronic devices with high transmit power can cause symbol errors in drive signals to display devices, leading to distorted images and affected display effects, with existing solutions either increasing production costs or being inflexible in noise interference management.
Innovation Solution
A timing controller with a detection circuit and control circuit that automatically adjusts the voltage swing of drive signals based on detected symbol error rates, where the magnitude of the voltage swing is negatively correlated with the symbol error rate, effectively reducing EMI without additional production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the voltage swing of drive signals is increased to improve signal transmission quality, then the signal reliability is improved, but the electromagnetic interference to other devices increases
Solution Approach 1:
The patent implements dynamic adjustment of voltage swing parameters based on detected symbol error rates. The control circuit automatically modifies the voltage swing magnitude in real-time according to channel conditions, transitioning from static to dynamic parameter control to resolve the contradiction between signal reliability and EMI generation.
Solution Approach 2:
The patent introduces a feedback mechanism where the detection circuit monitors symbol error rates and feeds this information back to the control circuit. This closed-loop feedback enables automatic adjustment of voltage swing parameters to maintain optimal signal quality while minimizing electromagnetic interference.
2Object-affected harmful factors
If shielding materials are added to reduce electromagnetic interference, then the anti-noise capability is improved, but the production cost increases
Solution Approach 1:
The patent replaces mechanical/physical shielding solutions with an electronic control approach. Instead of adding physical shielding materials, the system uses intelligent detection and dynamic voltage swing adjustment to achieve EMI reduction, eliminating the need for additional hardware components and reducing production costs.
Solution Approach 2:
The patent achieves EMI reduction by changing electrical parameters (voltage swing magnitude) rather than adding physical structures. This parameter-based solution avoids the cost of shielding materials while maintaining effectiveness in reducing electromagnetic interference.
3Device complexity
If fixed voltage swing parameters are used to simplify the control system, then the device complexity is reduced, but the adaptability to different noise environments deteriorates
Solution Approach 1:
The patent implements a self-adjusting control system that automatically adapts to different noise environments without requiring complex external control. The detection circuit and control circuit work together to self-tune the voltage swing parameters based on real-time symbol error rate measurements, providing adaptability while maintaining relatively simple system architecture.
Data Source
AI summary
Provided are a timing controller, and a driving method and a display device thereof. The timing controller may include a detection circuit and a control circuit. The detection circuit may detect a symbol error rate of a drive signal transmitted from a control circuit to a source drive circuit, and send the symbol error rate to the control circuit. The control circuit may automatically adjust a voltage swing of the drive signal according to the symbol error rate of the drive signal, and may enable a magnitude of the adjusted voltage swing to negatively correlate with a magnitude of the symbol error rate. Therefore, electromagnetic interference is effectively reduced, and flexibility in reducing electromagnetic interference is improved.