Dual-Capacitor Display Driving Circuit for Motion Blur Reduction
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Solution Overview
Problem
Hold-type LED display panels suffer from motion blur and frame rate limitations due to the method of inserting black/monochrome images, necessitating an improvement in frame rate, crosstalk, and motion blur.
Innovation Solution
A driving circuit incorporating a driving transistor and two capacitors, where one capacitor drives the current image signal and another pre-loads the next signal, allowing for global image refresh and reducing motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If black/monochrome images are inserted between frames to improve motion image quality, then motion blur is reduced, but frame rate decreases
Solution Approach 1:
The patent applies preliminary action by pre-loading the next frame's image data into a pre-loading capacitor during the discharge phase, before it is actually needed for display. This allows the display to transition smoothly between frames without requiring black insertion periods, thereby maintaining high frame rates while eliminating motion blur. The pre-loaded data is ready to be displayed immediately when the current frame completes, eliminating the temporal gap that causes motion blur.
2Loss of energy
If hold-type display method is used to maintain image until next frame, then power consumption is reduced, but motion blur increases
Solution Approach 1:
The patent applies dynamics by implementing a dual-mode display system that can dynamically switch between hold-type display (for static images to save power) and impulse-type display (for moving images to reduce motion blur). The system automatically detects motion in the pre-loaded next frame and adjusts the display mode accordingly, optimizing both power consumption and motion clarity based on real-time content requirements.
3Productivity
If faster scanning is implemented to increase frame rate, then productivity increases, but crosstalk between pixels increases
Solution Approach 1:
The patent applies preliminary action by completing the loading of the next frame's data into the pre-loading capacitor before the current frame's display period ends. This ensures that data transfer is finished in advance, allowing faster scanning rates without causing crosstalk between pixels. The pre-loading mechanism decouples the data transfer timing from the display timing, eliminating interference.
Data Source
AI summary
A driving circuit adaptable to a display panel includes a driving transistor connected between a first supply voltage and a light-emitting diode (LED); and two capacitors controllably connected to the driving transistor and a corresponding data line that provides an image signal. One of the two capacitors is used as a driving capacitor to controllably drive the driving transistor with a present image signal, while another of the two capacitors is used as a pre-loading capacitor for controllably pre-loading a succeeding image signal therein.