Stacked Display Aperture Layout for Moiré-Free Image Clarity
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Solution Overview
Problem
The moire phenomenon occurs in stacked display apparatuses due to the interference of light with similar wavelengths from multiple display panels, leading to image quality deterioration when a diffuser film is used to mitigate this, causing blurring.
Innovation Solution
A stacked display apparatus with multiple display panels having different aperture shapes is employed, where the difference in maximum spatial frequencies between the panels is maintained outside a predetermined range to reduce moire interference without using a diffuser film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a diffuser film is disposed between display panels to reduce moire phenomenon, then moire interference is reduced, but light intensity is lowered causing blurring and image quality deterioration
Solution Approach 1:
The patent applies asymmetry by configuring different aperture shapes between the first and second display panels. Specifically, when one panel has a rectangular aperture, the other panel is designed with a non-rectangular aperture (such as circular, triangular, or polygonal shapes). This asymmetric aperture configuration disrupts the periodic interference patterns that cause moire phenomena, eliminating the need for diffuser films while preserving light intensity and image quality.
2Reliability
If multiple display panels with same aperture shapes are stacked, then image quality is maintained, but moire phenomenon occurs due to light interference
Solution Approach 1:
The patent introduces asymmetry in aperture configuration between stacked display panels to prevent moire phenomena. By designing panels with different aperture geometries (e.g., one panel with rectangular apertures and another with circular or polygonal apertures), the periodic interference patterns are disrupted, eliminating moire effects while maintaining high image quality without requiring diffuser films.
3Object-affected harmful factors
If display panels with different aperture shapes are used, then moire phenomenon is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of apertures in display panels. Specifically, it changes the shape parameter from uniform (all rectangular) to varied (different shapes such as rectangular, circular, triangular, or polygonal). This parameter variation effectively reduces moire phenomena while the manufacturing process remains compatible with existing display fabrication techniques, as the aperture shapes can be implemented through standard photolithography and patterning processes.
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 minimizes moire interference while maintaining image quality by ensuring the ratio of maximum spatial frequencies between panels falls outside a specific range, thus enhancing visual clarity without the need for a diffuser film.
Implementation Method 1
light passing through each of the display panels may have the same or similar wavelength, and accordingly, interference of light may occur
Implementation Method 2
A moire phenomenon may occur due to physical characteristics of each of a plurality of display panels in a stacked display apparatus
Data Source
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AI summary
A stacked display apparatus and a method of operating the same are provided. The stacked display apparatus includes a first display panel in a form of a first aperture shape, and a second display panel in a form of a second aperture shape that is different from the first aperture shape, the second display panel being stacked on the first display panel, and a ratio of a first maximum spatial frequency of the first aperture shape and a second maximum spatial frequency of the second aperture shape is outside a predetermined range.