Module-rotation LED dome asymmetric equator alignment
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Solution Overview
Problem
The existing module-rotation LED dome designs often result in a bright blue line near the equator due to the arrangement of red, green, and blue LEDs, which affects the display effect and increases design and installation costs when trying to reduce costs by using identical hemisphere modules rotated 180 degrees.
Innovation Solution
The arrangement of display devices with first, second, third, and fourth light-emitting units, each comprising a full-color LED lamp with red, green, and blue LEDs, where each unit is oriented 90 degrees clockwise relative to the previous one, ensuring perpendicular orientations and preventing adjacent LEDs of the same color from aligning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If one hemisphere module is rotated 180 degrees to form the other hemisphere module, then design cost and installation workload are greatly reduced, but a bright blue line appears near the equator affecting display effect
Solution Approach 1:
The patent applies asymmetry by introducing a rotation angle α that is not equal to 180 degrees. Specifically, the rotation angle satisfies 90 degrees < α < 270 degrees and α ≠ 180 degrees, creating an asymmetric arrangement that prevents same-color LEDs from aligning at the equator while still allowing module reuse. This resolves the contradiction by maintaining cost efficiency through module reuse while eliminating the harmful blue line effect through asymmetric positioning.
Solution Approach 2:
The patent changes the rotation parameter from the fixed 180 degrees to a variable angle α within a specific range (90 < α < 270, α ≠ 180). This parameter change allows the system to avoid the harmful alignment of same-color LEDs at the equator while preserving the benefit of using identical modules for both hemispheres, thus resolving the contradiction between manufacturing ease and display quality.
2Object-affected harmful factors
If two hemisphere modules are designed with different LED arrangements to avoid blue line, then display effect is improved, but design cost and workload become very large
Solution Approach 1:
The patent makes a single hemisphere module design universal by enabling it to be rotated to any angle α (90 < α < 270, α ≠ 180) to form both hemispheres. This eliminates the need for separate designs for different hemispheres, significantly reducing design cost and workload while preventing the blue line effect through appropriate angle selection.
Solution Approach 2:
By changing the rotation angle parameter from the conventional fixed 180 degrees to a flexible range (90 < α < 270, α ≠ 180), the patent enables a single module design to achieve both hemispheres without creating blue lines, thus reducing design complexity while maintaining display quality.
3Ease of manufacture
If red, green and blue LEDs are arranged in strip type manner in adjacent LED lamps, then manufacturing is simplified, but adjacent LEDs of same color align at equator creating bright blue line
Solution Approach 1:
The patent maintains the simple strip-type arrangement of red, green, and blue LEDs within each LED lamp but introduces asymmetry through the rotation angle α (90 < α < 270, α ≠ 180). This asymmetric rotation prevents same-color LEDs from aligning at the equator while preserving the manufacturing simplicity of the strip-type LED arrangement.
Solution Approach 2:
The patent changes the rotation angle parameter to a range (90 < α < 270, α ≠ 180) that prevents harmful alignment while maintaining the simple strip-type LED arrangement. This parameter optimization resolves the contradiction between manufacturing simplicity and preventing same-color LED alignment at the equator.
Data Source
AI summary
A module-rotation LED dome belongs to the technical field of display screens and includes multiple display devices. Each display device includes 1st-4th light-emitting units. The second light-emitting unit is located beside the first light-emitting unit and oriented with a clockwise rotation of 90 degrees relative to the first light-emitting unit. The third light-emitting unit is located below the second light-emitting unit and oriented with a clockwise rotation of 90 degrees relative to the second light-emitting unit. The fourth light-emitting unit is located beside the third light-emitting unit and oriented with a clockwise rotation of 90 degrees relative to the third light-emitting unit. The 2nd-4th light-emitting units sequentially are rotated clockwise with 90 degrees, so that adjacent full-color LEDs in the 1st-4th light-emitting units cannot form adjacent LEDs of a same color, and there is no condition of appearing a bright blue line.