Display Blur Layer for Moire Reduction
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Solution Overview
Problem
Moiré patterns often occur in digital images captured by devices due to interference between periodic light-emitting structures in display devices and periodic light-sensing structures, leading to reduced image quality, and existing anti-Moiré filters are cumbersome and ineffective across various imaging conditions.
Innovation Solution
Incorporating a blur layer adjacent to the pixel layer in display devices that diffuses light emitted by the pixel elements, suppressing spatial frequencies associated with sub-pixel level periodicities while preserving pixel-level spatial resolution, thereby reducing Moiré pattern formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a blur layer is added to suppress sub-pixel level spatial frequencies, then Moiré pattern visibility is reduced, but device complexity increases
Solution Approach 1:
The blur layer is integrated directly into the display structure, merging the Moiré reduction function with the existing pixel layer and encapsulation layers. This eliminates the need for separate external filters on image capturing devices, as the display itself now provides the Moiré reduction capability through its built-in blur layer structure.
Solution Approach 2:
The blur layer acts as an intermediary element between the pixel layer and the external environment. It selectively suppresses sub-pixel level spatial frequencies that cause Moiré patterns while preserving pixel-level spatial resolution, thereby mediating the interaction between the display's periodic structures and external image capturing devices.
2Object-affected harmful factors
If the blur layer suppresses high spatial frequencies, then Moiré patterns are reduced, but image resolution may deteriorate
Solution Approach 1:
The blur layer is designed with specific optical properties that create localized diffusion effects. It selectively suppresses only the high spatial frequencies associated with sub-pixel level periodicities (which cause Moiré patterns) while preserving the lower spatial frequencies that carry the main image content and pixel-level spatial resolution. This local differentiation in frequency treatment allows Moiré reduction without significant image quality loss.
3Object-affected harmful factors
If additional anti-Moiré filters are added to image capturing devices, then Moiré patterns are reduced, but device complexity and cost increase
Solution Approach 1:
Instead of adding anti-Moiré filters to image capturing devices (the traditional approach), the invention inverts the solution by building the Moiré reduction capability directly into the display device. The blur layer is integrated into the display structure itself, eliminating the need for additional filters on cameras or other image capturing devices. This reversal of where the Moiré reduction function is implemented simplifies the overall system.
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
Significantly reduces Moiré pattern visibility in captured images without the need for additional filters on image capturing devices, maintaining image quality across different zoom levels and resolutions, and also absorbs ambient light to prevent reflections.
Implementation Method 1
a blur layer disposed adjacent to the pixel layer on the viewer side of the display, the blur layer configured to diffuse light emitted by the pixel elements
Implementation Method 2
absorbs ambient light to prevent reflections
Data Source
AI summary
Techniques and display devices that provide a built-in Moire reduction structure in a display screen are disclosed. The built-in Moire reduction structure is configured to suppress spatial frequencies that are associated with the sub-pixel level periodicities in the light emitted by the colored sub-pixels of the display screen, and hence, reduce the Moire patterns that might otherwise be produced when images presented on the display screen are captured by a digital image capturing device having a periodic light-sensing structure. The built-in Moire reduction structure is a blur layer placed on the viewer side of the screen and separated by a spacer layer from the pixel layer of the display screen. The blurring power of the blur layer is controlled to substantially preserve the pixel-level resolution of the display screen.