Dual Panel Display Moire Suppression via Pixel Pitch Variation
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Solution Overview
Problem
Conventional autostereoscopy technologies using two overlapped display panels often result in a moire pattern, which affects the clarity of the 3D image and can cause dizziness in users.
Innovation Solution
The display device employs a configuration where the first and second display panels have different pixel pitches and are spaced apart by a controlled distance, using polarizers and substrates with specific refractive indices to minimize the moire pattern by adjusting the effective viewing distance and the distance between the panels, ensuring the moire pitch remains below a threshold where it is not perceivable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two overlapped display panels are disposed spaced from each other to generate 3D image, then the 3D vision effect is improved and users do not feel dizzy, but a moire pattern is generated affecting image clarity
Solution Approach 1:
The patent applies parameter changes by adjusting the pixel pitch of the first display panel to be different from the pixel pitch of the second display panel. Specifically, the pixel pitch of the first panel is set to P1 and the pixel pitch of the second panel is set to P2, where P1 ≠ P2. This parameter differentiation prevents the formation of moire patterns while maintaining the 3D vision effect, as the overlapping panels with different pixel pitches create an effective pixel pitch that eliminates the interference pattern responsible for moire effects.
2Object-affected harmful factors
If the pixel pitch of the first display panel is made different from the pixel pitch of the second display panel, then the moire pattern is prevented, but the manufacturing complexity increases
Solution Approach 1:
The patent implements parameter changes by specifying different pixel pitches for the two display panels (P1 and P2). This approach prevents moire patterns by ensuring that the overlapping panels do not create interference patterns. The different pixel pitches can be achieved through standard manufacturing variations in display panel production, making the solution practically implementable without requiring fundamentally new manufacturing processes.
Solution Approach 2:
The patent applies local quality by allowing the two display panels to have different local characteristics, specifically different pixel pitches. The first display panel has pixel pitch P1 while the second has pixel pitch P2, creating local differentiation that prevents moire patterns. This local variation in pixel pitch is sufficient to eliminate the harmful moire effect while maintaining overall system functionality.
3Object-affected harmful factors
If the distance between the two display panels is controlled to maintain moire pitch below 500 micrometers, then the moire pattern becomes imperceptible, but the design flexibility is reduced
Solution Approach 1:
The patent applies parameter changes by controlling the distance D between the two display panels and adjusting the pixel pitches P1 and P2 to ensure that the resulting moire pitch remains below 500 micrometers. This parameter optimization makes the moire pattern imperceptible to users. By establishing specific parameter relationships (different P1 and P2 values, and controlled distance D), the patent eliminates the visibility issue while providing a systematic approach that can be adapted to different display configurations.
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 configuration effectively prevents the moire pattern from being seen by the user, enhancing the clarity and comfort of the 3D vision experience by maintaining a moire pitch below 500 micrometers, thus providing a clearer and more comfortable 3D viewing experience.
Implementation Method 1
a moire pattern is generated because the two display panels are overlapped
Data Source
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AI summary
The display device (100) includes a first display panel (110) and a second display panel (120). The first display panel (110) includes first pixel structures (115) having a first pixel pitch (Ptop). The second display panel (120) includes second pixel structures (125) having a second pixel pitch (Pbottom). The first display panel (110) is overlapped with the second display panel (120). A user (130) would not see a moire pattern generated by the display device (100) by adjusting the first pixel pitch (Ptop), the second pixel pitch (Pbottom), and an effective distance between the first display panel (110) and the second display panel (120).