Display Data Driver Equalizer Lock Time Optimization
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Solution Overview
Problem
Existing data drivers in display devices face challenges in reliably restoring signals from the timing controller, leading to suboptimal reception performance and display quality.
Innovation Solution
A data driver is designed with an equalizer, clock and data recovery circuit, lock detector, reset detector, training control circuit, and equalizer controller to optimize signal reception by calculating and selecting the optimal lock time for equalizer operation, ensuring optimal performance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the equalizer uses a fixed set signal, then the device complexity is reduced, but the reception performance deteriorates
Solution Approach 1:
The equalizer controller dynamically adjusts the set signal to different option codes based on calculated lock times, transforming a static configuration into an adaptive system that optimizes reception performance automatically
Solution Approach 2:
The data driver automatically tests and determines the optimal option code through lock time calculations without requiring external intervention or separate calibration equipment, enabling self-configuration
2Reliability
If multiple option codes are tested to find optimal lock time, then the reception performance is improved, but the manufacturing time increases
Solution Approach 1:
The system performs preliminary testing of multiple option codes during manufacturing to pre-determine the optimal configuration, so that the equalizer can operate at peak performance without requiring time-consuming adjustments during operation or field calibration
3Ease of manufacture
If option pads are used to set equalizer parameters, then the ease of manufacture is improved, but the device complexity increases
Solution Approach 1:
The patent removes the need for separate option pads by integrating the parameter setting function directly into the equalizer controller, which automatically determines and configures the optimal settings through lock time calculations
Solution Approach 2:
The equalizer controller performs multiple functions: it controls the equalizer operation, calculates lock times for different option codes, and automatically selects the optimal configuration, replacing what would traditionally require separate dedicated components
Data Source
AI summary
A data driver of a display device includes an equalizer and an equalizer controller. The equalizer controller calculates a lock time during a training enable signal is in an active state while sequentially changing a set signal applied to the equalizer to one option code selected from among a plurality of option codes and provides an option code corresponding to a set lock time among the option codes to the equalizer as the set signal.