Barrier-Wall Backlight Structure With Polygonal Mini LED Layout
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Solution Overview
Problem
Existing thin-film transistor liquid crystal display (TFT-LCD) devices using Mini LEDs as backlights face challenges in achieving uniform light emission and high contrast ratios comparable to organic light-emitting diode (OLED) displays, particularly in maintaining consistent light intensity across the display panel.
Innovation Solution
A backlight structure with a substrate and barrier wall pattern that arranges light-emitting units in specific geometric configurations, such as forming M-sided polygons, to distribute light-emitting units in light regions, ensuring optimal spacing and alignment to enhance light uniformity and intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If light-emitting units are arranged in conventional patterns, then manufacturing is simple, but light emission uniformity is poor
Solution Approach 1:
The display panel is divided into multiple light zones, with each zone containing a specific number of light-emitting units arranged in geometric patterns (triangles, quadrilaterals, pentagons, hexagons). This segmentation allows independent optimization of light distribution in different regions, improving overall uniformity while maintaining manageable complexity through modular design
Solution Approach 2:
Different light zones have different numbers of light-emitting units (3-6 units per zone) arranged in specific geometric configurations. The arrangement is optimized locally for each zone type, with units positioned at vertices or centers of geometric shapes. This local optimization ensures appropriate light intensity distribution for each region while maintaining systematic organization
2Illumination intensity
If light-emitting units are densely distributed, then light intensity is high, but light emission uniformity deteriorates
Solution Approach 1:
Light-emitting units are arranged in asymmetric geometric patterns (triangles, quadrilaterals, pentagons, hexagons) rather than uniform grids. The asymmetric distribution allows light from multiple units to overlap and fill in intensity variations, achieving high overall intensity while maintaining uniformity through geometric optimization
Solution Approach 2:
The arrangement transitions from conventional two-dimensional grid patterns to geometric patterns utilizing vertex and center positions of polygons. This dimensional reorganization allows light-emitting units to be positioned at optimal locations for both intensity and uniformity, effectively using spatial geometry to resolve the contradiction
3Reliability
If contrast ratio is increased to match OLED, then display quality improves, but light uniformity control becomes more difficult
Solution Approach 1:
The patent optimizes geometric parameters including the number of light-emitting units per zone (3-6 units), the types of geometric patterns (triangles, quadrilaterals, pentagons, hexagons), and the positioning of units within each pattern. These parameter variations allow fine-tuning of light distribution to achieve high contrast ratios while maintaining uniformity through systematic geometric optimization
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 proposed structure improves light emitting uniformity and maintains high contrast ratios by optimizing the arrangement of light-emitting units, enhancing the display quality of TFT-LCD devices.
Implementation Method 1
Mini light-emitting diodes (Mini LEDs) can be used as backlights of the thin film transistor liquid crystal display devices
Data Source
AI summary
A backlight structure and a display device are provided. The backlight structure includes a barrier wall pattern and light-emitting units. The barrier wall pattern includes openings and a barrier wall surrounding the openings, the openings are configured to define light regions; and the light-emitting units are distributed in the light regions. The backlight structure includes a central region and an edge region, each light region is provided with at least three light-emitting units, centers of M light-emitting units, closest to vertex angles of the light region are sequentially connected to form an M-sided polygon, and a distance between a center of the M-sided polygon and a center of the light region is less than 10% of a pitch of the light region, and an included angle between each of the first direction and the second direction and each side of the M-sided polygon is greater than 0 degrees.