Display Backplane With Alternating Mini-LED Sizes for Uniform Brightness
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Solution Overview
Problem
The use of Mini-LEDs in display backplanes results in uneven brightness due to poor light mixing between adjacent beads, leading to overall uneven brightness and darkness.
Innovation Solution
A display backplane design with alternating and differently sized light-emitting units, where first light-emitting units are larger in one direction and smaller in another, with specific alignment and connection patterns to ensure uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If Mini-LED beads are made smaller to reduce size, then the display device achieves smaller size and higher pixel density, but light mixing between adjacent beads becomes poor, resulting in uneven brightness
Solution Approach 1:
The patent applies local quality by creating two types of light-emitting units (first and second) with different size characteristics. The first light-emitting units have larger dimensions in the first direction while the second have larger dimensions in the second direction. This local differentiation allows adjacent units to complement each other's light emission, improving overall brightness uniformity while maintaining small form factor.
Solution Approach 2:
The patent implements asymmetry by designing light-emitting units with non-uniform size distribution. Instead of all units being identical, alternating first and second light-emitting units create an asymmetric pattern where units differ in their dimensional characteristics. This asymmetric arrangement ensures that no single direction dominates the light emission, achieving uniform brightness across the display.
2Ease of manufacture
If light-emitting units are arranged in a regular grid pattern, then manufacturing is simplified, but overlapping light emission patterns are inconsistent, causing uneven brightness distribution
Solution Approach 1:
The patent applies segmentation by dividing the light-emitting units into two distinct categories (first and second light-emitting units) with different size characteristics. This segmentation allows each type to fulfill a specific role in the overall light distribution pattern, where their combined effect achieves uniform brightness while maintaining a relatively simple alternating arrangement.
Solution Approach 2:
By assigning different size properties to different positions in the array (first units larger in first direction, second units larger in second direction), the patent achieves local optimization of light emission. Each position contributes differently to the overall pattern, ensuring consistent overlapping light emission patterns while maintaining manufacturing feasibility through the regular alternating structure.
Data Source
AI summary
A display backplane and a display device are provided in the application. The display backplane includes light-emitting unit groups arranged in a first direction. Each light-emitting unit group includes first light-emitting units and second light-emitting units arranged alternately in a second direction. Sizes of the first light-emitting units in the first direction are greater than sizes of the second light-emitting units in the first direction, and sizes of the first light-emitting unit in the second direction are less than sizes of the second light-emitting units in the second direction.