Image Display Device Sub-Frame Blur Suppression
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Solution Overview
Problem
Continuous-type image display devices face challenges in reducing blur when displaying moving objects, as existing methods either lead to dark images or increase signal processing load, and fail to replicate natural visual characteristics.
Innovation Solution
The method involves dividing one frame into multiple sub-frames, reducing the high-spatial frequency component in some sub-frames to blur the image outline, while increasing it in others to maintain luminance, using a low-pass filter to generate a new image signal that reduces signal processing load and mimics natural visual characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the high-spatial frequency component is reduced in all sub-frames to suppress blur, then the blur of the outline is reduced, but the image luminance decreases and the image becomes darker
Solution Approach 1:
The frame is divided into multiple sub-frames, and the high-spatial frequency component reduction is applied selectively to only certain sub-frames rather than all sub-frames. This segmentation allows different parts of the display time to have different processing applied, suppressing blur in specific moments while preserving luminance in others.
Solution Approach 2:
Different processing is applied to different sub-frames based on their temporal position. Specifically, sub-frames at odd positions (1st, 3rd, 5th, etc.) have the high-spatial frequency component reduced to suppress blur, while sub-frames at even positions (2nd, 4th, 6th, etc.) maintain normal luminance. This creates local quality variation in the temporal domain.
2Object-affected harmful factors
If a generated image signal is inserted between continuous frames to reduce blur, then the outline blur is reduced, but the signal processing load greatly increases
Solution Approach 1:
Instead of generating completely new image signals between frames (excessive action), the invention applies partial processing by selectively reducing the high-spatial frequency component in only certain sub-frames. This partial action achieves blur suppression without the computational burden of full signal generation.
Solution Approach 2:
The invention changes the spatial frequency parameters of the image signal in a selective manner. By adjusting the high-spatial frequency component parameter in specific sub-frames while leaving other parameters unchanged, it achieves blur suppression with minimal processing load compared to generating entirely new signals.
3Object-affected harmful factors
If intermittent image display with black periods is used to reduce blur, then the outline blur is reduced, but the image becomes darker and causes flickering
Solution Approach 1:
The invention applies periodic action by alternating between sub-frames with reduced high-spatial frequency content (odd positions) and sub-frames with normal content (even positions). This periodic pattern creates a temporal rhythm that suppresses blur while maintaining overall luminance, avoiding the continuous darkness of black display periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively suppresses image blur when tracking moving objects and maintains overall luminance, achieving display quality similar to natural vision without increasing signal processing load.
Implementation Method 1
using a low-pass filter to generate a new image signal that reduces signal processing load and mimics natural visual characteristics
Data Source
AI summary
An image display method includes dividing one frame into a plurality of sub-frames by multiplying a frame frequency of an input image signal, reducing a high-spatial frequency component of an image signal which is used for image display in at least one predetermined sub-frame among the plurality of sub-frames in comparison with that of an image signal which is used for image display in another sub-frame, and displaying an image in each sub-frame.