3D Display Screen with Laterally Displaced Sub-Pixel Rows
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Solution Overview
Problem
Autostereoscopic 3D display technology faces issues with optical interference between the display screen's periodic structure and grating/lenticular lens array, leading to Moire fringes and crosstalk, which degrade the display performance.
Innovation Solution
A 3D display screen with a pixel array featuring laterally displaced groups of sub-pixel units, where each sub-pixel unit includes light-shielding stripes with a specific gap, allowing for uniform light distribution between the viewer's left and right eyes, reducing crosstalk and improving display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a periodic structure (pixels, black matrix) is used in the display screen with a grating/lenticular lens array, then autostereoscopic 3D display function is achieved, but optical interference occurs causing Moire fringes and crosstalk
Solution Approach 1:
The patent applies asymmetry by laterally displacing odd-numbered sub-pixel unit rows relative to even-numbered rows. This asymmetric arrangement breaks the periodicity that causes Moire fringes and optical interference, while still enabling the grating structure to function for autostereoscopic 3D display. The displacement creates an aperiodic pattern that eliminates the harmful interference effects.
Solution Approach 2:
The patent changes the spatial parameter of sub-pixel unit row positions by introducing lateral displacement. Specifically, odd-numbered rows are displaced by a distance of (N-1)×W/2 relative to even-numbered rows, where N is the number of sub-pixel units and W is the width. This parameter change transforms the periodic structure into a non-periodic one, eliminating Moire fringes while maintaining the 3D display function.
2Ease of manufacture
If special eyewear (polarized or color filter) is used for 3D display, then 3D visual effects are achieved, but light sensitivity is poor and user experience is degraded
Solution Approach 1:
The patent extracts and eliminates the need for special eyewear by implementing the 3D display function directly through the display screen structure. By using a grating structure with laterally displaced sub-pixel units, the system directs light differently to each eye without requiring polarized lenses or color filters, thus removing the eyewear constraint and improving light sensitivity and user experience.
3Object-affected harmful factors
If lateral displacement of sub-pixel unit rows is increased to reduce Moire fringes, then optical interference is minimized, but abrupt lateral changes occur degrading display performance
Solution Approach 1:
The patent applies local quality by differentiating the treatment of odd and even numbered sub-pixel unit rows. Odd rows are laterally displaced by (N-1)×W/2 while even rows remain at their original positions. This localized asymmetric displacement minimizes Moire fringes while controlling the magnitude of lateral changes to maintain display performance uniformity.
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 minimizes crosstalk and enhances 3D display performance by ensuring uniform light distribution and reducing abrupt lateral changes between sub-pixel unit rows, resulting in improved autostereoscopic 3D visual effects without the need for special eyewear.
Implementation Method 1
The sub-pixel unit includes a plurality of light-shielding stripes arranged in parallel, and two adjacent light-shielding stripes have a gap of P in the first lateral direction
Data Source
AI summary
A 3D display screen and a 3D display device are provided. The 3D display screen comprises a pixel array comprising m laterally displaced groups. The laterally displaced group includes n rows of sub-pixel units, the sub-pixel units in a same sub-pixel unit row are arranged in a first lateral direction, m is a positive integer larger than or equal to 1, and n is a positive integer larger than or equal to 2. The sub-pixel unit includes a plurality of light-shielding stripes, and two adjacent light-shielding stripes have a gap of P in the first lateral direction. Along the first lateral direction, the nth sub-pixel unit row has a lateral displacement of P with respect to the 1st sub-pixel unit row, the ith sub-pixel unit row has a lateral displacement of P/n with respect to the (i−1)th sub-pixel unit row, where i is a positive integer and 1<i≤n.