Lenticular Display with Variable Focal Length Lenses
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Solution Overview
Problem
Lenticular type display devices suffer from viewer fatigue due to permanent optical properties, difficulty in switching between 3D and 2D image modes, and chromatic aberration caused by using lenses with the same shape for different colors, leading to reduced display quality.
Innovation Solution
The use of lenticular display devices with lenses having different focal lengths for red, green, and blue pixels, and the incorporation of liquid crystal material with electric field control to switch between 2D and 3D modes, eliminating chromatic aberration by focusing different color lights at the same position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lenses with the same shape are used for red, green, and blue pixels, then the manufacturing process is simple, but chromatic aberration occurs causing reduced display quality
Solution Approach 1:
The patent applies local quality by assigning different focal lengths to lenses corresponding to different color pixels (red, green, blue). Each lens is optimized locally for its specific wavelength, with shorter focal lengths for blue light and longer focal lengths for red light, thereby eliminating chromatic aberration while maintaining manufacturing feasibility through systematic variation rather than complete customization
Solution Approach 2:
The patent changes the focal length parameter of the lenses based on the color of the underlying pixels. By systematically varying the focal length parameter according to color (blue: shortest, green: intermediate, red: longest), the patent achieves chromatic aberration correction without requiring completely different lens designs, thus balancing manufacturing simplicity with display quality
2Device complexity
If permanent optical properties are used in lenticular display devices, then the structure is simple, but viewer fatigue occurs due to inability to switch between 3D and 2D modes
Solution Approach 1:
The patent applies dynamics by making the lenticular lens optical properties changeable rather than permanent. By integrating liquid crystal materials that can alter their refractive indices in response to electric field changes, the patent enables dynamic switching between 3D and 2D display modes, thereby improving viewing comfort while maintaining acceptable structural complexity through a single integrated component
Solution Approach 2:
The patent changes the optical parameters (refractive indices) of the lenticular lens by applying electric fields to liquid crystal materials. This allows the lens to transition between different optical states (3D mode with specific refractive indices vs. 2D mode with different refractive indices), enabling mode switching without requiring multiple physical lens sets, thus balancing operational flexibility with device complexity
3Manufacturing precision
If different focal lengths are used for different color lenses, then chromatic aberration is eliminated improving display quality, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by assigning different focal lengths to lenses corresponding to different color pixels (red, green, blue). Each lens is optimized locally for its specific wavelength, with shorter focal lengths for blue light and longer focal lengths for red light, thereby eliminating chromatic aberration while maintaining manufacturing feasibility through systematic variation rather than complete customization
Solution Approach 2:
The patent applies universality by using a single lenticular lens structure that serves multiple functions: it acts as both a 3D display element and a 2D display element through electric field control. The liquid crystal-filled lenticular lens can switch between optical states, making one component perform the work of multiple components would be needed in traditional systems, thereby reducing overall manufacturing complexity
4Ease of operation
If liquid crystal material with electric field control is incorporated, then mode switching between 2D and 3D is enabled improving viewer comfort, but device complexity increases
Solution Approach 1:
The patent applies dynamics by making the lenticular lens optical properties changeable rather than permanent. By integrating liquid crystal materials that can alter their refractive indices in response to electric field changes, the patent enables dynamic switching between 3D and 2D display modes, thereby improving viewing comfort while maintaining acceptable structural complexity through a single integrated component
Solution Approach 2:
The patent merges the lenticular lens structure with liquid crystal material filling, creating an integrated component that combines optical shaping with electrically controllable refractive index modulation. This consolidation eliminates the need for separate control mechanisms and reduces overall device complexity while enabling mode switching functionality
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 addresses viewer fatigue by enabling mode switching and improves display quality by removing chromatic aberration, allowing for clear and comfortable 3D and 2D image rendering without the need for separate glasses.
Implementation Method 1
The lens 22 has a semi-cylindrical shape that extends along a direction perpendicular to a plane of FIG. 1. Two two-dimensional images for the left and right eyes are refracted and transferred to the left and right eyes, respectively, by the lens 22.
Implementation Method 2
a lenticular cell including at least two lenticular-shaped spaces filled with liquid crystal material corresponding to the at least two color regions, respectively, and having first and second conductive layers generating an electric field applied to the liquid crystal material
Data Source
AI summary
A display device comprising: a display cell including at least two color regions, each of the at least color regions including a right-eye pixel and a left-eye pixel corresponding to a right eye and a left eye of a viewer, respectively; and a lenticular cell including at least two lenses corresponding to the at least two color regions, wherein the at least two lenses having different focal lengths.