Display Synchronization Control for Abnormal External Sync Signals
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Solution Overview
Problem
Display devices face reliability issues in maintaining display quality when synchronization signals from external devices are abnormal or not synchronized, leading to potential display anomalies.
Innovation Solution
The display device incorporates a controller with a synchronization signal generator, corrector, and control signal generator that generates internal synchronization signals based on a reference clock, corrects external synchronization signals, and adjusts control signals based on synchronization determination and error detection circuits to ensure reliable operation even with abnormal external signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device uses external synchronization signals for control, then the display device can operate in synchronization with external devices, but the display quality reliability deteriorates when external synchronization signals are abnormal
Solution Approach 1:
The patent introduces a synchronization signal generator as an intermediary component that creates internal synchronization signals based on a reference clock signal. This internal signal generator acts as a mediator between the external synchronization signals and the display panel, allowing the system to maintain reliable operation by switching to internally generated signals when external signals are abnormal, thus resolving the contradiction between external adaptability and display quality reliability
2Ease of operation
If the display device relies on external synchronization signals, then the operation is simple, but display anomalies occur when external signals are abnormal
Solution Approach 1:
The patent implements preliminary action by proactively generating internal synchronization signals based on a reference clock signal before external signal abnormalities occur. The synchronization signal generator is pre-configured to create backup internal signals, and the system includes mechanisms to detect external signal abnormalities and switch to internal signals in advance, preventing display anomalies before they occur while maintaining operational simplicity
Data Source
AI summary
Disclosed is a display device, which includes a display panel, a controller that receives an image signal and an external synchronization signal and generates a control signal, and a driver that generates a driving signal in response the control signal and provides the driving signal to the display panel. The controller includes a synchronization signal generator that generates an internal synchronization signal based on a reference clock signal, a corrector that corrects the internal synchronization signal to generate a corrected synchronization signal, and a control signal generator that generates the control signal, and the control signal generator generates the control signal based on the external synchronization signal when the external synchronization signal is in a normal state, and generates the control signal based on the internal synchronization signal when the external synchronization signal is in an abnormal state.