Scan Display Driver Synchronizing Refresh With Line Scan Backlight
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional driving methods for scan-type displays with non-periodic synchronization control signals and scanning backlight modules often result in image tearing or interruption due to the line scan manner of light emission.
Innovation Solution
A driving method and device that includes a driver module receiving an image stream and synchronization control signal, generating a drive output based on these signals and a clock signal to control the backlight module for line scan emission, and producing an image refresh signal to synchronize image refreshes, preventing image tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backlight module emits light in a line scan manner triggered by non-periodic synchronization control signal, then the display can adapt to variable frame rates, but image tearing or interruption occurs
Solution Approach 1:
The patent applies preliminary action by generating the image refresh signal in advance based on the synchronization control signal before the actual image display occurs. This allows the display module to pre-synchronize its refresh operation with the line scan backlight emission, ensuring that image data is ready and properly timed when the backlight emits light, thereby preventing image tearing while maintaining variable frame rate adaptability
Solution Approach 2:
The patent implements feedback by using the synchronization control signal to dynamically generate both the drive output for the backlight module and the image refresh signal for the display module. This feedback mechanism ensures that both components are coordinated based on the actual timing of the non-periodic synchronization signal, maintaining display continuity while adapting to variable frame rates
2Reliability
If the driver module generates drive output based on synchronization control signal and image stream, then image refresh can be synchronized, but complex signal processing is required
Solution Approach 1:
The patent applies merging by combining the generation of the drive output signal and the image refresh signal into a single processing stage within the driver module. Both signals are generated simultaneously from the same synchronization control signal and image stream inputs, reducing the need for separate processing circuits and simplifying the overall signal processing architecture while maintaining synchronization
Data Source
AI summary
A driving method is to be implemented by a driver module, is adapted to drive a scan-type display, and includes steps of: receiving an image stream and a synchronization control (SC) signal from a control module; generating a drive output based on the SC signal, the image stream and a clock signal to drive the display such that the display emits light in a line scan manner; and generating an image refresh signal based on the SC signal and the drive output. The image refresh signal is related to refreshing of images on the display.