Display Channel Switching via Frame Address Synchronization
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Solution Overview
Problem
Current display channel switching methods in ultra-high-definition systems are inefficient, resulting in long switching times and poor user experience due to the need to reset write and read controllers, causing them to restart from the first frame address in the memory.
Innovation Solution
A method and device for switching display channels that involve sending specific switching signals to write and read controllers to stop and restart operations seamlessly, allowing continuous data reading and writing by determining the frame address where the final write operation is completed and synchronizing signals with field synchronization and read control signals to maintain data flow without resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the write controller and read controller are reset during display channel switching, then the controllers can be reinitialized for the new channel, but the switching time increases and user experience deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the starting frame address for the target display channel before switching occurs. When a channel switch is needed, the system immediately retrieves the pre-computed starting address from a lookup table, avoiding the need to reset and reinitialize the controllers. This allows the write controller to immediately begin writing at the correct address and the read controller to continue its operation without interruption, significantly reducing switching time while maintaining reliability.
2Ease of manufacture
If the controllers restart from the first frame address, then the data writing and reading process can be simplified, but the switching efficiency decreases
Solution Approach 1:
The patent applies local quality by differentiating the initialization behavior between different display channels. Instead of uniformly restarting all controllers from the first frame address, the system assigns different starting frame addresses to different channels based on their specific requirements. The lookup table stores channel-specific starting addresses, allowing each channel to have its own optimized data writing and reading process while maintaining overall system efficiency during switching.
3Adaptability or versatility
If the write controller stops writing at an arbitrary frame address, then channel switching can be initiated at any time, but the data synchronization becomes complex
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a lookup table that stores pre-calculated starting frame addresses for different display channels. This intermediary structure simplifies the data synchronization complexity by providing a direct mapping between channel identifiers and their corresponding starting addresses. The write controller simply retrieves the starting address from this lookup table and begins writing operations, eliminating the need for complex real-time synchronization calculations while maintaining full switching timing flexibility.
Data Source
AI summary
The present disclosure provides a method and device for switching a display channel, a display driving device and a display device. The method includes: sending a first switching signal to a write controller of a current display channel when a switching instruction for switching from the current display channel to a target display channel is received; acquiring a frame address in which final write operation of data is completed, and taking the frame address as a first address and a next frame address as a second address; sending a second switching signal to a write controller of the target display channel; and sending a third switching signal to a read controller.