Angled 3D Grating Reduces Moire in Display Devices
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Solution Overview
Problem
Stereoscopic display devices often generate moire patterns due to the parallel arrangement of 3D gratings with black matrix patterns, which affects the display quality.
Innovation Solution
A display device with a 3D grating arranged at an angle to the pixel columns, where the grating units are designed to have a specific pitch and luminance control in alternating view regions, reducing the parallelism between the grating and black matrix patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 3D grating is arranged parallel to the pixel columns, then the stereoscopic display function is achieved, but moire patterns are generated affecting display quality
Solution Approach 1:
The patent applies asymmetry by arranging the 3D grating in a first direction that forms a non-zero angle with the column direction of pixels, breaking the parallel symmetry between the grating and pixel columns. This angular offset prevents the formation of moire patterns while preserving the stereoscopic display function, as the grating remains functional for separating left and right eye views without creating interfering interference patterns with the pixel structure.
Solution Approach 2:
The patent changes the angular parameter of the grating arrangement relative to the pixel columns. Specifically, the grating is arranged at an angle θ where θ ≠ 0° relative to the column direction of pixels, transforming the arrangement from parallel (0°) to an angled configuration. This parameter change effectively eliminates moire patterns while maintaining the grating's ability to provide stereoscopic separation.
2Manufacturing precision
If the grating units are arranged with specific pitch to match pixel dimensions, then display precision is improved, but the complexity of the device structure increases
Solution Approach 1:
The patent establishes a specific mathematical relationship for the pitch P of grating units: P = [D/(D+d)] × S, where D is the distance from eyes to display panel, d is the distance from grating units to display panel, and S is the length sum of n sub-pixels. This parameter formulation optimizes the pitch to achieve proper stereoscopic separation and moire reduction while providing a systematic design rule that manages structural complexity through standardized calculations.
3Object-affected harmful factors
If the angle between the first direction and pixel column direction is increased, then moire patterns are reduced, but the 3D display effect may be compromised
Solution Approach 1:
The patent optimizes the angle parameter between the grating direction and pixel column direction to a non-zero value that balances moire reduction with 3D display quality. The specific angular parameter is chosen to be sufficient to eliminate moire patterns interference while remaining within ranges that preserve effective stereoscopic separation and viewing comfort.
Data Source
AI summary
A display device and a driving method thereof are provided. The display device, including a display panel and a 3D grating provided above the display panel in a first direction, the 3D grating including a plurality of grating units sequentially arranged, and the display panel including a plurality of columns of pixels; wherein, the first direction and a column direction of the pixels have an angel of non-zero value therebetween. The sloped 3D grating and the black matrix pattern are no longer parallel with each other, thereby reducing moire patterns generated during display.