Display Driver Signal Integrity via Dynamic Eye Diagram Adjustment
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Solution Overview
Problem
Existing display technologies face signal attenuation issues due to varying panel sizes and positions, which affect the optimal setting parameters for output differential voltage, pre-emphasis circuits, and equalizers, leading to suboptimal signal transmission quality.
Innovation Solution
A driving apparatus and method that includes a timing controller with a pre-emphasis circuit, drivers with equalizers, and a switch connected in series between data lines, where the timing controller and drivers perform synchronization operations and dynamically adjust setting parameters based on eye diagram detection results to optimize signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed setting parameters are used for output differential voltage, pre-emphasis circuit, and equalizer, then device complexity is reduced, but signal transmission quality deteriorates due to varying panel sizes and positions
Solution Approach 1:
The patent implements dynamic adjustment of setting parameters for the output differential voltage, pre-emphasis circuit, and equalizer based on real-time eye diagram detection results. The system transitions from fixed parameters to dynamically adjustable parameters that adapt to different panel sizes and positions, thereby improving signal transmission quality without requiring multiple fixed parameter sets.
Solution Approach 2:
The patent introduces a feedback mechanism where the eye diagram detection result is used to automatically adjust the setting parameters. The detection unit continuously monitors signal quality, and the adjustment unit modifies parameters based on this feedback, creating a closed-loop system that optimizes signal transmission adaptively.
2Reliability
If different setting parameters are used for various drivers and timing controllers, then signal transmission quality improves, but ease of operation deteriorates due to parameter configuration requirements
Solution Approach 1:
The system performs self-adjustment of setting parameters based on automatic eye diagram detection. The detection unit and adjustment unit work autonomously to optimize signal transmission without requiring manual intervention or complex configuration procedures, making the system easy to operate while maintaining high signal quality.
Solution Approach 2:
The patent automatically changes setting parameters based on detected signal conditions. The adjustment unit modifies parameters such as output differential voltage, pre-emphasis strength, and equalizer settings in response to eye diagram analysis, eliminating the need for manual parameter configuration while optimizing performance.
3Reliability
If dynamic adjustment of setting parameters is implemented, then signal transmission quality improves, but device complexity increases due to additional detection and adjustment circuits
Solution Approach 1:
The detection unit and adjustment unit are integrated into the existing timing controller and driver architecture, serving multiple functions. The same circuits perform both signal transmission and quality detection/adjustment, reducing the need for separate dedicated components and minimizing overall system complexity.
Solution Approach 2:
The patent combines the eye diagram detection function and parameter adjustment function into the existing signal transmission path. The detection unit analyzes signals during transmission, and the adjustment unit modifies parameters in real-time within the same circuit framework, merging multiple functions into a unified system rather than adding separate complex subsystems.
Data Source
AI summary
A driving apparatus and a driving signal generating method are provided. The driving apparatus includes a timing controller, a driver, a switch and a resistor. The timing controller generates a bi-direction lock signal. The driver receives a differential signal pair. The switch is turned on or cut off according to an eye diagram detection result of the differential signal pair. According to the bi-direction lock signal, the timing controller and the driver are used to: operate a first clock and data recovery (CDR) operation on the differential signal pair during a first time period; set setting parameters of an output differential voltage, a pre-emphasis circuit and an equalizer according to the eye diagram detection result and an on/off state of the switch, and perform a second CDR operation during a second time period; and drive a display according to the differential signal pair during a third time period.