Backlight Driving Signal Waveform Adjustment for Motion Blur Control
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Solution Overview
Problem
Conventional display devices suffer from motion blur issues, particularly when displaying high frame rate or high motion objects, leading to reduced visual quality, and lack an effective motion blur adjustment function across various display modes, resulting in unstable image effects, over-contrast, and over-sharpness.
Innovation Solution
A display method and system that adjusts motion blur by setting specific waveforms of the backlight driving signal within pixel active and blank intervals based on selected display modes, with a power ratio determining the motion blur effect, utilizing a processor to generate and control the backlight driving signal in conjunction with a display panel and backlight switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a pulse width modulation signal is used for driving the backlight source in hold type display mode, then the backlight source is constantly enabled to emit backlight, but the displayed image becomes unstable and motion blur occurs
Solution Approach 1:
The patent applies periodic action by switching from continuous backlight emission (hold type) to periodic impulse emission. The backlight driving signal transitions from a constant pulse width modulation signal to an impulse waveform that emits light only during specific intervals (e.g., vertical blanking intervals), creating a stroboscopic effect that eliminates motion blur while maintaining image stability.
Solution Approach 2:
The patent uses preliminary action by pre-configuring the backlight driving signal to emit light before the active display interval begins. The impulse waveform is timed to emit during the vertical blanking interval, which occurs before the next frame's active display period, thereby preparing the visual system to perceive the next frame without motion blur from the previous frame's trailing light.
2Reliability
If a CRT-based impulse waveform driving mode is used for the backlight source, then motion blur is reduced, but the maximum supported display brightness level is reduced and image effect becomes unstable
Solution Approach 1:
The patent applies dynamics by making the backlight driving signal adjustable and adaptive rather than fixed. The system dynamically switches between different driving modes (hold type and impulse type) based on display content requirements, and adjusts the impulse waveform parameters (amplitude, width, timing) to optimize both brightness and motion blur reduction for different scenarios.
Solution Approach 2:
The patent uses parameter changes by modifying the backlight driving signal characteristics including amplitude, pulse width, and timing. The impulse waveform parameters are adjusted to achieve optimal brightness levels while maintaining motion blur reduction, allowing the system to adapt to different display requirements and content types.
3Reliability
If motion blur is reduced too much in static image display mode, then over-contrast effect and over-sharpness effect occur, but in dynamic image display mode, if motion blur is too obvious, then image delay and image sticking effect occur
Solution Approach 1:
The patent applies dynamics by implementing a display mode selection mechanism that adapts the backlight driving strategy based on the type of content being displayed. The system dynamically switches between hold type mode for static images and impulse type mode for dynamic content, optimizing the motion blur level for each scenario to avoid visual discomfort.
Solution Approach 2:
The patent uses parameter changes by adjusting the backlight driving signal parameters according to display mode. In static image mode, the system maintains higher brightness and minimal motion blur reduction, while in dynamic mode, it switches to impulse waveform with adjusted parameters to achieve optimal motion blur reduction without causing image delay or sticking effects.
Data Source
AI summary
A display method includes selecting a display mode from a plurality of display modes, acquiring a data clock signal having a data period including a pixel active interval and a blank interval, and setting waveforms of a backlight driving signal within the pixel active interval and the blank interval according to the display mode in order to meet a motion blur effect corresponding to the display mode. A power ratio of the backlight driving signal within the blank interval to the backlight driving signal within the pixel active interval determines the motion blur effect. The waveforms of the backlight driving signal within the pixel active interval and the blank interval are different.