Spherical LED Display Screen with Fan-Shaped Unit Boards
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Solution Overview
Problem
Existing LED display screens in spherical shapes face issues with non-uniform pixel pitch and color differences due to the arrangement of display unit boards, leading to serrated edges and recognizable splicing seams when viewed from different angles, which affects the panoramic image experience.
Innovation Solution
The LED display screen is arranged in an Eskimo ice house-like shape with display unit boards distributed evenly in a fan shape along the latitude direction, decreasing in number towards the poles, and symmetrically positioned with respect to the equatorial line, ensuring a uniform pixel pitch and consistent LED lamp bead orientation to minimize color differences and seam visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If display unit boards are arranged in straight lines in the latitude direction (melon scoop structure), then the arrangement is simple and easy to manufacture, but the pixel pitch becomes non-uniform and serrated edges appear when viewed from the overall spherical vision
Solution Approach 1:
The patent applies spheroidality by arranging display unit boards along curved longitude lines and latitude lines that conform to the spherical surface. The longitude lines converge at the poles while maintaining equal angular intervals, and the latitude lines are distributed at equal angular intervals from the equator. This curved arrangement ensures that pixels along each longitude line are equally spaced, eliminating the serrated edges and pitch non-uniformity caused by straight-line arrangements, while still maintaining manufacturing feasibility through standardized board configurations.
2Device complexity
If the number of display unit boards in different latitudes is kept the same, then the arrangement structure is simple, but the width of display unit boards must be reduced proportionally as the latitude length is reduced, making the boards adjacent to the poles too small
Solution Approach 1:
The patent applies local quality by allowing the number of display unit boards to vary at different latitudes according to the spherical geometry. Specifically, the equator region contains more latitude lines (and thus more display boards) while the polar regions contain fewer latitude lines. This local adaptation ensures that display unit boards maintain a reasonable size throughout the sphere, with boards near the equator being wider and boards near the poles being narrower, matching the natural convergence of longitude lines and preventing excessively small boards at the poles.
3Ease of manufacture
If triangle or hexahedral display unit boards are used in block arrangement, then the arrangement is simple, but the pixel arrangement between blocks cannot implement uniform arrangement rule, causing color differences in adjacent areas
Solution Approach 1:
The patent applies homogeneity by ensuring that all display unit boards use the same rectangular configuration and pixel arrangement pattern. Each board maintains consistent pixel pitch and orientation relative to its local coordinate system. The longitude lines are distributed at equal angular intervals, ensuring that adjacent boards along any longitude line have pixels facing the same direction. This homogeneous approach eliminates the color differences and arrangement inconsistencies that would arise from using different polygonal shapes or block-based arrangements with varying pixel orientations.
Data Source
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AI summary
The present invention discloses an LED display screen arranged in an Eskimo ice house-like shape, wherein the LED display screen is a spherical display screen, and a plurality of display unit boards are provided to be divided with respect to the equatorial line of the spherical display screen and distributed along the warp direction and latitude direction of the spherical display screen respectively. The plurality of display unit boards are arranged evenly in rows in a fan shape in the latitude direction, and the number of each row of the plurality of display unit boards is sequentially decreased from the equatorial line toward the south pole and the north pole respectively; in the latitude direction, every two rows of the plurality of display unit boards are symmetrically distributed with respect to the equatorial line; in the positions of the North pole and the South pole of the spherical display screen, two of the plurality of display unit boards, which are half-circular, are arranged; a plurality of LED lamp beads are arranged on the side of each of the plurality of display unit boards facing the inside of the spherical display screen. It is beneficial to adopt an installation method, according to which, a hyperboloid display with an Eskimo ice house shape with connected lines of latitude and lines of longitude in the direction of the south pole and the north pole cross joint can be formed, so that the splicing seam of the display unit boards is unrecognizable to the naked eye, which is more suitable for multi-viewing and panoramic image experience.