3D Display Device Liquid Crystal Lens Crosstalk Reduction
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Solution Overview
Problem
Current naked-eye stereoscopic 3D display devices using liquid crystal lenses suffer from reduced brightness and crosstalk due to disordered liquid crystal molecule arrangements, leading to a suboptimal 3D displaying effect.
Innovation Solution
A 3D display device comprising a display panel and an optical element with a liquid crystal lens, where the liquid crystal lens has a reduced thickness and functions as a plane glass in 3D mode, reducing crosstalk and improving the display effect by controlling the arrangement of liquid crystal molecules and using a corresponding optical element to separate left and right eye images without blocking light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a liquid crystal lens with thick liquid crystal layer and large refractive index is used to match the preset viewing distance, then the viewing distance can be matched, but the alignment function of the alignment layer to liquid crystal molecules at the center position is weakened, causing crosstalk during 3D displaying
Solution Approach 1:
The patent changes the parameters of the liquid crystal lens by using a thinner liquid crystal layer (reducing thickness from conventional thick layers) and optimizing the refractive index to be within a specific range (1.35-1.55). This parameter optimization resolves the contradiction by maintaining sufficient phase retardation for 3D display while preserving the alignment layer's control over liquid crystal molecules, thereby reducing crosstalk.
Solution Approach 2:
The patent employs a dynamic liquid crystal lens that can switch between 2D and 3D displaying modes. In 3D mode, the liquid crystal molecules are arranged to provide the necessary phase retardation with minimal thickness. The dynamic control allows the system to adapt the liquid crystal molecule orientation based on the display mode, optimizing performance for each mode while avoiding the thickness-related alignment issues in 3D mode.
2Reliability
If a parallax barrier with light shielding region is used to achieve 3D displaying, then the stereoscopic effect can be produced, but the brightness of the display device is seriously reduced
Solution Approach 1:
The patent extracts the light-blocking function from the 3D display system by replacing the parallax barrier with a liquid crystal lens that transmits light without blocking it. The liquid crystal lens achieves 3D display through phase retardation and molecular orientation control rather than light shielding, thereby eliminating the brightness loss associated with light-blocking regions while maintaining the stereoscopic effect.
3Illumination intensity
If a liquid crystal lens is used to improve brightness compared to parallax barrier, then brightness loss is reduced, but crosstalk appears during 3D displaying due to disordered arrangement of liquid crystal molecules at boundary region
Solution Approach 1:
The patent applies local quality control by optimizing the liquid crystal molecule arrangement specifically at the boundary regions between adjacent liquid crystal lens units. By controlling the molecular orientation and alignment in these critical boundary areas, the patent eliminates crosstalk while maintaining the overall brightness advantage of the liquid crystal lens approach.
Solution Approach 2:
The patent optimizes the liquid crystal refractive index to a specific range (1.35-1.55) and reduces the liquid crystal layer thickness, which changes the optical parameters to reduce crosstalk. These parameter changes allow the liquid crystal lens to maintain brightness while minimizing the disordered molecular arrangement effects at boundaries that cause crosstalk.
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 allows for effective switching between 2D and 3D modes with reduced crosstalk and enhanced display quality, improving the stereoscopic effect while maintaining simplicity in device structure and operation.
Implementation Method 1
the liquid crystal lens has a reduced thickness and functions as a plane glass in 3D mode, reducing crosstalk and improving the display effect by controlling the arrangement of liquid crystal molecules
Implementation Method 2
using a corresponding optical element to separate left and right eye images without blocking light
Data Source
AI summary
Embodiments of the present invention provide a 3D display device, and the 3D display device, comprising: a display panel (1), configured to display an image; an optical element (2) and a liquid crystal lens (3), disposed to overlap each other and positioned at a light exiting side of the display panel (1), wherein the optical element (2) comprises a plurality of optical lens units (2a), the liquid crystal lens (3) comprises a plurality of liquid crystal lens units (3a), the plurality of liquid crystal lens units (3a) correspond to the plurality of optical lens units (2a) in a one-to-one corresponding relationship; when the 3D display device is in a 2D displaying mode, each of the plurality of liquid crystal lens units (3a) has an effect on light contrary to an effect on the light of each of the plurality of optical lens units (2a), and when the 3D display device is in a 3D displaying mode, the liquid crystal lens unit (3a) is configured to have a plane glass function. The 3D display device provided by the embodiments of the present invention can be switched between 2D and 3D displaying, and can reduce the crosstalk during 3D displaying and improve the display effect.