Display Panel Grating Asymmetry Eliminates Moire
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Solution Overview
Problem
The existing glasses-free 3D display technology using slit gratings at a light-exiting surface of a 2D display panel often results in a moire phenomenon due to the parallel alignment of light blocking and light transmission zones with the black matrix, degrading display quality.
Innovation Solution
A display panel with a grating at the light-exiting surface featuring alternately arranged light blocking and light transmission zones in adjacent rows, where each light blocking zone either matches or exceeds the area of a pixel unit, preventing continuous light blocking zones in columns and aligning differently with the black matrix, thus avoiding moire phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light blocking zones and light transmission zones of the slit grating are arranged parallel to the black matrix direction, then the 3D display function is achieved, but a moire phenomenon occurs degrading display quality
Solution Approach 1:
The patent applies asymmetry by arranging light blocking zones and light transmission zones in a non-uniform pattern relative to the black matrix. Specifically, the grating structure is designed such that light blocking zones are positioned at different locations in different rows, creating an asymmetric arrangement that breaks the periodic alignment between the grating and black matrix, thereby eliminating the moire phenomenon while preserving 3D display functionality
Solution Approach 2:
The patent resolves the contradiction by introducing a second dimension of variation in the grating structure. Instead of uniform horizontal stripes, the light blocking zones are shifted vertically in alternating rows, creating a staggered pattern. This dimensional change in the arrangement pattern disrupts the periodic interference that causes moire effects while maintaining the light directionality needed for 3D display
2Manufacturing precision
If light blocking zones are made larger to improve light blocking effectiveness, then more complete pixel unit coverage is achieved, but the area ratio between light blocking and transmission zones changes
Solution Approach 1:
The patent applies local quality by making each light blocking zone exactly match the area of one pixel unit, creating a precise one-to-one correspondence. This local optimization ensures complete coverage of individual pixel units by light blocking zones while maintaining overall balance in the grating structure, as each blocking zone is sized specifically for its corresponding pixel rather than using uniform large or small blocks throughout
Data Source
AI summary
Embodiments of the present disclosure provide a display panel and a display device. The display panel of the present disclosure comprises matrix-arranged pixel units and a grating provided at a light-exiting surface side of the display panel. The grating comprises light blocking zones and light transmission zones provided alternately in a row, and the light blocking zones and light transmission zones are provided alternately in the order of light blocking zone and light transmission zone in one of two adjacent rows and in the order of light transmission zone and light blocking zone in the other of the two adjacent rows, wherein each of at least one light blocking zone blocks completely a pixel unit. The display panel of the disclosure can solve the problem of the moire phenomenon which is caused by the overlap of directions of the light blocking zones of the grating and the black matrix of the existing display panel. In addition, the display effect of the display panel of the disclosure is better.