Dual Lens Array 3D Display Suppressing Moiré
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Solution Overview
Problem
Current 3D image display devices face challenges in suppressing moiré phenomenon and inversion of 3D images, while maintaining image luminance, without modifying the display unit structure.
Innovation Solution
A display device comprising a display unit with a first lens array unit and a second lens array unit, where the second lenses have a pitch equal to or less than the pixels' pitch, and the first lenses overlap multiple pixels, with specific focal distance and distance relationships between the lenses to enhance image quality by reducing moiré patterns and increasing luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lens array unit is used to display 3D images, then 3D image display capability is achieved, but moiré phenomenon and inversion phenomenon occur
Solution Approach 1:
The patent divides the single lens array unit into two separate lens array units. The first lens array unit has lenses with a first pitch, and the second lens array unit has lenses with a second pitch that is different from the first pitch. This segmentation allows each lens array to contribute to different aspects of light control, thereby displaying 3D images while suppressing moiré and inversion phenomena.
Solution Approach 2:
The patent changes the pitch parameter of the lenses between the two lens array units. Specifically, the second pitch is set to be different from the first pitch (e.g., the second pitch is half of the first pitch). This parameter change disrupts the periodic interference patterns that cause moiré phenomenon while maintaining the ability to guide light to appropriate viewpoints for 3D display.
2Object-affected harmful factors
If the pitch of lenses is reduced to suppress moiré phenomenon, then moiré pattern is suppressed, but image luminance decreases
Solution Approach 1:
The patent segments the lens array function into two units with different pitches. The first lens array unit uses a larger pitch that is optimized for light gathering and luminance, while the second lens array unit uses a smaller pitch that is optimized for suppressing moiré patterns. This segmentation allows each unit to optimize for its specific function without compromise.
Solution Approach 2:
The second lens array unit with smaller pitch acts as an intermediary between the display panel and the first lens array unit. It suppresses moiré patterns by breaking up periodic interference, while the first lens array unit with larger pitch then guides the pre-processed light to the appropriate viewpoints, maintaining luminance efficiency.
3Manufacturing precision
If the structure of display unit is modified to improve image quality, then 3D image quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the lens array into two separate units with different functions and pitch values. This segmentation improves 3D image quality by suppressing moiré and inversion phenomena while maintaining a relatively simple overall structure. Each lens array unit can be manufactured and positioned independently, facilitating modular assembly.
Solution Approach 2:
The two lens array units together perform multiple functions: the first lens array guides light to viewpoints for 3D display, while the second lens array suppresses moiré patterns. This multi-functional arrangement achieves high image quality without requiring complex modifications to the display panel itself.
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
The solution effectively improves 3D image quality by suppressing moiré patterns and inversion, increasing image luminance across viewpoints without altering the display unit structure, resulting in enhanced fill factor and reduced dark regions.
Implementation Method 1
a photomodulation unit that uses a lens array to control a path of light
Data Source
AI summary
A display device includes a display unit that includes a plurality of pixels; a first lens array unit that includes a plurality of first lenses; and a second lens array unit disposed between the first lens array unit and the display unit and that includes a plurality of second lenses. Each of the first lenses overlaps two or more of the pixels, and a pitch of the second lenses is less than a pitch of the first lenses.