Line-by-Line Black Insertion for Display Moving Image Blur
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Solution Overview
Problem
Existing hold-type display devices, such as liquid crystal displays and organic electro-luminescent displays, suffer from moving image blur due to the fixed black insertion rate, which is determined on a frame-by-frame basis and does not effectively address luminance differences within a frame, resulting in reduced image quality, especially in areas with low luminance levels.
Innovation Solution
A display device with a proportion determination unit that sets the black insertion rate on a line-by-line basis, allowing for increased black insertion relative to low luminance levels, thereby optimizing the gray level range and reducing moving image blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fixed black insertion rate is applied to the entire frame, then moving image blur is reduced, but image quality in low luminance areas deteriorates
Solution Approach 1:
The patent applies different black insertion rates to different regions of the display based on luminance characteristics. Specifically, it identifies low luminance regions and applies a higher black insertion rate to those regions while maintaining a lower rate in high luminance regions, thereby locally optimizing image quality without compromising overall performance
Solution Approach 2:
The patent segments the display frame into multiple regions based on luminance levels. It divides the image data into high luminance portions and low luminance portions, and applies different black insertion processing to each segment, allowing independent optimization of each region's image quality
2Stability of the object's composition
If black insertion rate is increased to reduce moving image blur, then image stability improves, but gray level range decreases
Solution Approach 1:
The patent dynamically adjusts the black insertion rate based on the luminance characteristics of different regions. Instead of using a fixed rate, it varies the black insertion rate adaptively - applying higher rates to low luminance regions and lower rates to high luminance regions, thereby maintaining both image stability and gray level range
Solution Approach 2:
The patent changes the black insertion rate parameter according to regional luminance characteristics. By modifying this parameter dynamically based on image content analysis, it achieves different levels of black insertion in different regions, resolving the contradiction between stability and gray level range
Data Source
AI summary
A display device includes a display that includes display elements arranged in lines of a matrix. Each display element is configured to emit light based on a video signal that is received by the display. A proportion determiner is configured to determine, for each line, a proportion of a single frame period during which each display element of a corresponding line is not to emit the light. A signal converter is configured to convert an amplitude of the video signal for each line according to the proportion determined for each line. A signal output is configured to output the video signal converted by the signal converter to the display as a converted video signal. A scanner is configured to output a scanning signal to the display for each line for inputting the converted video signal to the display elements of each line based on the proportion determined for each line.