Multi-Chip Display Panel Synchronization With Adaptive Frame Timing
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Solution Overview
Problem
Display mosaicking or tearing effects occur due to overlapping of delayed image frames in display apparatuses, especially when multi-chips are used, leading to synchronization issues between display panel driving circuit chips.
Innovation Solution
A display apparatus with a controller that adjusts display synchronization by detecting input image frame reception times and delaying data signal transmission based on frame synchronization signals, thereby adapting to input data delays and preventing overlapping of image frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-chips are applied to the display apparatus, then the display area and resolution are improved, but synchronization issues between display panel driving circuit chips occur leading to display mosaicking
Solution Approach 1:
The controller detects the actual reception start time of image frames from the host system and uses this feedback information to dynamically adjust the transmission start time of data signals to the display panel. This closed-loop feedback mechanism ensures that even when input data is delayed, the display timing is automatically corrected to prevent mosaicking effects between multi-chips.
Solution Approach 2:
The patent implements dynamic timing adjustment where the transmission start time of data signals is not fixed but is instead adaptively delayed based on the detected reception start time of image frames. This dynamic adjustment allows the system to respond to varying input data delays and maintain synchronization across multiple display chips.
2Ease of operation
If the controller transmits data signals at a fixed timing, then the driving control is simple, but display tearing effects occur when input image data is delayed
Solution Approach 1:
The controller performs preliminary detection of the reception start time of image frames before transmitting data signals to the display panel. By detecting the actual input data timing in advance and using this information to set the transmission start time, the system proactively prevents tearing effects rather than reacting to them after they occur.
3Speed
If the transmission start time of data signal is not delayed, then the response speed is fast, but overlapping of delayed image frame and previous image frame causes tearing effect
Solution Approach 1:
The patent dynamically changes the timing parameter of data signal transmission based on the detected reception start time of image frames. When input data delay is detected, the transmission start time parameter is adjusted (delayed) to match the actual data availability, preventing overlapping of image frames while maintaining the fastest possible response speed under current conditions.
Data Source
AI summary
A display apparatus includes at least one display panel including a pixel array configured by a plurality of pixels. The display apparatus further includes at least one controller which receives image data from a host system and controls the driving of the display panel to display the image data. The controller transmits a frame synchronization signal notifying a transmission start time for every image frame included in the image data to the host system, detects a reception start time for an image frame received from the host system, and delays a transmission start time of a data signal corresponding to the image frame to the display panel based on a difference between a start time of the frame synchronization signal and the reception start time.