Mini-LED Backlight Structure With Polygonal Layout for Uniformity
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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 a specific polygonal configuration, ensuring a balanced distribution of light-emitting units within defined light regions, with optimized angles and distances 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 a conventional grid pattern, then manufacturing is simple, but light emission uniformity deteriorates
Solution Approach 1:
The patent applies asymmetry by arranging light-emitting units in a polygonal configuration rather than a conventional symmetric grid pattern. Specifically, the light-emitting units are positioned at vertices of a polygon where each side forms a specific angle (greater than 0 degrees) with the first and second directions. This asymmetric angular arrangement ensures that light is distributed more uniformly across the display panel, preventing the formation of visible patterns or hot spots that would occur with regular grid arrangements.
Solution Approach 2:
The patent transitions from a one-dimensional linear arrangement or simple two-dimensional grid to a multi-dimensional polygonal configuration. By defining positions based on polygon vertices with specific angular relationships to multiple directions (first direction and second direction), the arrangement utilizes dimensional complexity to achieve uniform light distribution in all directions, effectively solving the uniformity issue without excessive manufacturing complexity.
2Illumination intensity
If light-emitting units are densely packed to increase brightness, then light intensity increases, but light emission uniformity deteriorates
Solution Approach 1:
The patent applies local quality by optimizing the position of each light-emitting unit based on its specific location within the polygonal arrangement. Each light-emitting unit is positioned at a vertex where the sides form specific angles with the first and second directions, creating locally optimized light distribution characteristics. This ensures that even when densely packed, each unit contributes uniformly to the overall light output, preventing local hot spots or uneven illumination while maintaining high overall intensity.
3Reliability
If conventional backlight structures are used, then device complexity is low, but contrast ratio deteriorates
Solution Approach 1:
The patent employs asymmetric angular positioning of light-emitting units relative to the first and second directions, creating a polygonal arrangement that optimizes light distribution for high contrast ratios. This asymmetric configuration ensures uniform light emission across the display panel, which is critical for achieving high contrast ratios comparable to OLED displays, while the modular polygonal structure keeps the overall device complexity manageable.
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 a high contrast ratio, enhancing the display performance of TFT-LCD devices to match or exceed that of OLED displays.
Implementation Method 1
a plurality of light-emitting units is distributed in the plurality of light regions
Implementation Method 2
a light intensity distribution I of the light-emitting unit satisfies: I=I0 cos mα
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.