Display Device with Adaptive Low-Pass Filter for Parallax and Contrast
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Solution Overview
Problem
Conventional display devices that overlap multiple panels to improve contrast and reduce parallax-related display defects face challenges in achieving both objectives simultaneously, as low-pass filter processing in wide or narrow pixel regions either fails to enhance contrast or reduce defects effectively.
Innovation Solution
A display device configuration with overlapping panels, where an image processor adjusts the degree of low-pass filter processing based on input image gradation, reducing the filter's application size when gradation is lower and increasing it when higher, to optimize contrast and defect reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If low-pass filter processing is performed in a wide pixel region, then the display defect due to parallax is reduced, but the contrast is hardly improved
Solution Approach 1:
The patent applies different degrees of low-pass filter processing to different regions of the image based on local characteristics. Specifically, it performs stronger filtering in regions where parallax defects are more prominent while maintaining weaker filtering in regions where contrast is more important, thereby achieving both defect reduction and contrast preservation through spatially varying filter strength
Solution Approach 2:
The patent dynamically adjusts the filter strength based on the local image content and parallax characteristics. By making the filter degree adaptive rather than uniform, the system can optimize the balance between parallax defect reduction and contrast maintenance for each specific region of the displayed image
2Illumination intensity
If low-pass filter processing is performed in a narrow pixel region, then the contrast is improved, but the display defect due to parallax is hardly reduced
Solution Approach 1:
The patent implements region-specific filter strength where narrow pixel region filtering is applied selectively. In regions where contrast enhancement is prioritized, the filter operates with narrow scope, while in regions where parallax defects are more critical, the filter expands its scope to cover wider pixel regions, achieving both objectives through spatial differentiation
Solution Approach 2:
The system dynamically modulates the filter application size based on local image characteristics and parallax severity. This dynamic adjustment allows the filter to switch between narrow and wide pixel region operations depending on the specific display requirements of each image region, optimizing both contrast and defect reduction
3Illumination intensity
If a fixed degree of low-pass filter processing is applied, then the processing is simple, but both contrast improvement and defect reduction cannot be achieved simultaneously
Solution Approach 1:
The patent introduces dynamic filter degree adjustment based on image content analysis and parallax characteristics. By making the filter strength adaptive rather than fixed, the system achieves optimal balance between contrast improvement and defect reduction without requiring overly complex processing, maintaining reasonable computational efficiency
Solution Approach 2:
The patent modifies the filter processing parameters (filter degree, pixel region size) based on the input image characteristics and display requirements. By dynamically changing these parameters rather than using fixed values, the system achieves superior performance in both contrast and defect reduction while keeping the overall processing framework relatively simple
Data Source
AI summary
A display device according to present disclosure comprising: a first display panel that displays a first image; a second display panel disposed on a back surface side of the first display panel to display a second image; and an image processor that acquires input image data and generates first image data corresponding to the first image and second image data corresponding to the second image based on the input image data, wherein the image processor includes a first filter circuit that performs first low-pass filter processing on the input image data, and the first filter circuit reduces a degree of the first low-pass filter processing when input gradation of the input image data is less than first gradation as compared with a case that the input gradation is greater than or equal to the first gradation.