Lens Array with Variable Vertex Inclination for Image Quality
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Solution Overview
Problem
Conventional lens arrays in image display devices face challenges in simultaneously suppressing graininess and multiple lines blurring of iridescent due to regular lens arrangement, where varying vertex positions to address one issue often compromises the other.
Innovation Solution
A lens array with bidimensionally regularly-arranged convex lenses that are inclined variably around a common rotation axis, allowing vertex position shifts in both the plane view and height directions, breaking the cyclic structure to suppress both graininess and iridescent blurring, while maintaining high lens density through a honeycomb arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a lens array with regular bidimensional arrangement of convex lenses is used, then graininess on the image is suppressed, but multiple lines blurring of iridescent occurs due to diffracted light from the cyclic structure
Solution Approach 1:
The patent introduces asymmetry by varying the vertex positions of convex lenses in the plane view direction while maintaining the regular bidimensional arrangement. This asymmetric variation breaks the cyclic symmetry that causes diffracted light patterns, thereby suppressing multiple lines blurring of iridescent while preserving the regularity needed to avoid graininess
Solution Approach 2:
The patent changes the positional parameters of the convex lenses by varying vertex positions within a specific range (0.05D to 0.5D where D is the lens pitch) while maintaining the overall regular arrangement. This parameter variation disrupts the cyclic structure causing iridescent blurring without compromising the regularity that prevents graininess
2Object-generated harmful factors
If the vertex position of each convex lens is varied in the plane view direction to suppress multiple lines blurring, then diffracted light is reduced, but the regularity of lens arrangement is broken which may worsen graininess
Solution Approach 1:
The patent carefully controls the parameter variation of vertex positions within a specific range (0.05D to 0.5D) to achieve the right balance. This controlled parameter change is sufficient to break the cyclic structure and suppress iridescent blurring, yet small enough to maintain the overall regularity of the lens array and prevent graininess
Solution Approach 2:
The patent applies local variation to vertex positions while maintaining global regularity. Each lens has its vertex position varied locally within a controlled range, which disrupts the cyclic pattern locally without affecting the overall regular arrangement, thus suppressing iridescent blurring while preventing graininess
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 solution effectively reduces graininess and iridescent blurring by varying the vertex positions of convex lenses in both directions, allowing for adequate design parameterization and achieving a high lens density, thus enhancing image quality.
Implementation Method 1
a light source projecting light representing an image, and a transparent screen to which the light projected by the light source is irradiated, and utilizing a lens array as a screen
Data Source
AI summary
Provided is a lens array in which a plurality of convex lenses bidimensionally regularly-arranged along a predetermined reference face. The plurality of convex lenses is arranged so as to be inclined variedly mutually among the plurality of convex lenses around a vertex of a convex face of a reference posture as a rotation axis with respect to the reference posture mutually common to the plurality of convex lenses.