Naked-Eye 3D Display Using Misaligned Liquid Crystal Lens Arrays
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Solution Overview
Problem
Birefringent lens 3D displays suffer from reduced image resolution in 3D mode due to the columnar lens array's light splitting function, which halves the number of pixels perceived by each eye, resulting in lower display quality.
Innovation Solution
A lens display device comprising an optical thin film layer with a single-refringent film and two liquid crystal lens arrays, where the liquid crystal lens elements are misaligned by half the lens period, and their polarization directions alternate between ordinary and unordinary light modes to enable full-resolution naked-eye 3D display by switching the polarized switch unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a columnar lens array is used to generate 3D effect through light splitting, then 3D display function is achieved, but the resolution is reduced to half because only half of pixels are perceived by each eye
Solution Approach 1:
The patent divides the liquid crystal lens array into two separate arrays: a first liquid crystal lens array for controlling ordinary light and a second liquid crystal lens array for controlling unordinary light. Each array independently manages half of the pixel columns, allowing both eyes to receive full-resolution images while maintaining the 3D light splitting effect.
Solution Approach 2:
The patent introduces a new dimension of control by adding a second liquid crystal lens array that operates in parallel with the first array. This dual-array configuration adds a dimensional layer to the light control system, enabling simultaneous management of ordinary and unordinary light paths to achieve full-resolution 3D display.
2Stability of the object's composition
If a single-refringent substance with refractive index matching the liquid crystal polymer is used, then the optical thin film has no light focusing effect in 2D mode, but this matching refractive index configuration limits the optical control flexibility
Solution Approach 1:
The patent employs liquid crystal materials that can dynamically change their refractive index based on applied voltage. In 2D mode, the liquid crystal refractive index matches the single-refringent substance for minimal focusing effect, while in 3D mode, the refractive index changes to create the necessary light splitting effect. This dynamic adjustment provides both stability in 2D mode and flexibility for 3D operation.
Solution Approach 2:
The patent utilizes changes in the refractive index parameter of the liquid crystal material to switch between 2D and 3D display modes. By adjusting the refractive index through voltage control, the optical thin film transitions from a state with no light focusing effect (2D mode) to a state with light splitting capability (3D mode), achieving both stability and adaptability.
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 allows for full-resolution 3D display by interchanging pixel columns between the left and right eyes during alternating polarized switch states, maintaining high image quality in both 2D and 3D modes.
Implementation Method 1
the liquid crystal polymer has two refractive indexes, one of which is the refractive index n0 with respect to ordinary light, and the other of which is a refractive index ne with respect to unordinary light
Implementation Method 2
the polarized switch unit is configured, when operative, to polarize the emergent light emitting from the display unit into ordinary light entering the first liquid crystal lens array and to polarize the emergent light emitting from the display unit into unordinary light entering the second liquid crystal lens array
Implementation Method 3
When the polarized switch is driven, the liquid crystal polymer has a larger refractive index with respect to incident light than that of the single-refringent substance with respect to incident light, thus the optical thin film has a light focusing effect
Data Source
AI summary
A lens display device is disclosed. The device includes an optical thin film layer, a polarized switch unit, and a display unit emitting light. The optical thin film layer includes a single-refringent film layer, and first and second liquid crystal lens arrays on the single-refringent film layer. The arrays are positioned such that the lens elements of the first array are misaligned from the lens elements of the second array by half of the lens period. The polarized switch unit, when operative, polarizes the light emitting from the display unit into ordinary light entering the first liquid crystal lens array and into unordinary light entering the second liquid crystal lens array. In addition, when inoperative, the polarized switch unit polarizes the light emitting from the display unit into unordinary light entering the first liquid crystal lens array and into ordinary light entering the second liquid crystal lens array.