Display Device Synchronization Signal Stabilization
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Solution Overview
Problem
Conventional display apparatuses require a longer time to stabilize synchronization signals when switching from internal to external synchronization, leading to potential degradation in display quality, such as flicker, due to the random phase difference between internal and external synchronization signals.
Innovation Solution
A display device driving method that involves receiving a training signal, transmitting a lock signal based on the internal synchronization signal, and then receiving a video signal synchronous with the external synchronization signal to minimize the phase difference and stabilize the synchronization signal efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device switches from internal synchronization signal to external synchronization signal, then the display device can display video from external signal source, but the synchronization signal requires longer time to stabilize due to random phase difference
Solution Approach 1:
The display device transmits a lock signal at a timing based on the internal synchronization signal before receiving the video signal. This preliminary action allows the external signal source to advance the phase of the external synchronization signal, reducing the phase difference when switching occurs and thereby reducing the stabilization time.
Solution Approach 2:
The lock signal transmission creates a feedback mechanism where the display device's internal synchronization timing is used to control the external signal source's phase. This feedback loop enables the external synchronization signal to be adjusted based on the internal signal characteristics, minimizing phase difference and stabilization time.
2Adaptability or versatility
If the phase difference between internal and external synchronization signals is large, then the external signal source can operate independently, but degradation of display quality such as flicker occurs during stabilization period
Solution Approach 1:
By transmitting the lock signal in advance at a timing based on the internal synchronization signal, the system prepares the external synchronization signal's phase before the actual video signal reception begins. This preliminary phase alignment prevents large phase differences from causing display quality degradation during the stabilization period.
Solution Approach 2:
The lock signal transmission serves as a preliminary counteraction to the potential phase mismatch problem. By proactively adjusting the external synchronization signal's phase based on internal signal timing, the system prevents the harmful effect of large phase differences and subsequent display quality issues before they occur.
Data Source
AI summary
The present disclosure provides a display device driving method and the like that can suppress degradation of display quality at the time of switching to a video based on a video signal from an external signal source. The display device driving method according to the present disclosure includes: receiving a training signal transmitted from an external signal source; after receiving the training signal, transmitting a lock signal to the external signal source at a timing based on an internal synchronization signal of the display device; after transmitting the lock signal, receiving a video signal that is transmitted from the external signal source and is synchronous with an external synchronization signal; and displaying a video by using the video signal received from the external signal source.