Backlight Panel LED Layout for Uniform Irregular-Edge Illumination
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Solution Overview
Problem
In micro-LED display screens with irregular shapes, the arrangement of LEDs at equal intervals leads to non-uniform luminance, causing dark areas and optical interference, resulting in poor display performance and uniformity.
Innovation Solution
A backlight panel design with a substrate featuring first and second light-emitting areas, where the second light-emitting areas are located adjacent to the first and have a smaller area, allowing for a varied arrangement of second light-emitting devices to match the irregular shape, enhancing space utilization and luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LEDs are arranged at equal intervals in irregularly shaped backlight panels, then the arrangement is simple and manufacturing is easy, but dark areas appear at irregular edges and luminance uniformity deteriorates
Solution Approach 1:
The patent divides the backlight panel into multiple light emitting areas with different LED pitch values. Specifically, a first light emitting area has a first pitch value between adjacent LEDs, while a second light emitting area has a second pitch value that is smaller than the first pitch value. This local differentiation allows the irregular edge area to have denser LED arrangement (smaller pitch) to fill dark areas, while the main area maintains larger pitch for simplicity, thus resolving the contradiction between manufacturing ease and luminance uniformity.
2Ease of operation
If LEDs are arranged at equal intervals, then the arrangement pattern is regular and easy to implement, but irregular edge areas cannot be adjusted and overall panel uniformity deteriorates
Solution Approach 1:
The patent segments the backlight panel into multiple light emitting areas (first light emitting area and second light emitting area) with different LED pitch characteristics. The first light emitting area uses a first pitch value while the second light emitting area uses a smaller second pitch value. This segmentation allows different regions to have optimized LED arrangements according to their specific geometric requirements, improving overall panel uniformity while maintaining reasonable operational simplicity.
3Ease of manufacture
If a single pitch value is used throughout the panel, then the LED arrangement is consistent and simple to manufacture, but space utilization in irregular areas is poor
Solution Approach 1:
The patent implements different pitch values in different light emitting areas to optimize space utilization. The second light emitting area, which corresponds to irregular edge areas, uses a smaller pitch value that allows better space utilization by fitting LEDs more densely into the available space. The first light emitting area uses a larger pitch value for manufacturing simplicity. This local quality approach resolves the contradiction between arrangement consistency and space utilization.
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 design improves luminance uniformity and optical performance by optimizing the layout of light-emitting devices to adapt to irregular shapes, reducing dark areas and enhancing overall display quality.
Implementation Method 1
a plurality of first light-emitting devices arranged, in rows and in columns, in the first light-emitting area; and a plurality of second light-emitting devices arranged, in rows and in columns, in the second light-emitting area
Data Source
AI summary
A backlight panel is provided, which includes a substrate including first and second light-emitting areas, first light-emitting devices arranged in rows and in columns in the first light-emitting area, and second light-emitting devices arranged in rows and in columns in the second light-emitting area. The first light-emitting area overlaps the center of the backlight panel. The second light-emitting area is located on a side of the first light-emitting area. A first coincident boundary is formed between the first and second light-emitting areas, and a second coincident boundary is formed between the second light-emitting area and the backlight panel. In the row direction, the distance between at least one second light-emitting device closest to the second coincident boundary and another adjacent second light-emitting device is less than a distance between any two adjacent first light-emitting devices.