Backlight Partition Blocks Light Leakage in Flat Displays
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Solution Overview
Problem
Current flat panel display technologies face issues with display quality, including retained images and the ripple phenomenon (Mura), due to light leakage and non-uniform light reflection from multiple light sources.
Innovation Solution
A back light module with a reflector, at least two light sources, and a partition disposed centrally between them, where the partition is a reflective plate with uniform thickness, effectively blocking light leakage and ensuring overlapping light paths to enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources are used to illuminate the display panel, then the brightness and coverage are improved, but light leakage occurs between adjacent light sources causing the ripple phenomenon (Mura) and retained images
Solution Approach 1:
A partition structure is introduced as an intermediary element between adjacent light sources. This partition includes a reflective surface that redirects light from one light source away from adjacent light sources, preventing light leakage and the resulting Mura effect and image retention issues.
Solution Approach 2:
The harmful light leakage between adjacent light sources is extracted and redirected. The partition structure captures the stray light that would otherwise cause Mura effects and image retention, and redirects it in a controlled manner to serve the display function without causing harm.
2Object-affected harmful factors
If a partition is added between light sources to block light leakage, then the ripple phenomenon is reduced, but the device complexity increases
Solution Approach 1:
The partition is implemented as a thin plate-like structure with a reflective surface, rather than a bulky three-dimensional component. This thin-film approach effectively blocks light leakage and reduces the Mura effect while minimizing the increase in device complexity and maintaining a compact form factor.
3Object-affected harmful factors
If the partition is positioned close to light sources to effectively block light, then light leakage is reduced, but the uniformity of light distribution deteriorates
Solution Approach 1:
The partition structure extends in multiple spatial dimensions to create effective light blocking. By positioning the partition at strategic locations and extending it appropriately, the design achieves effective light leakage prevention while maintaining uniform light distribution across the display panel through multi-dimensional spatial arrangement.
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 solution effectively enhances motion picture quality by blocking light leakage and avoiding the ripple phenomenon, maintaining optical film properties while ensuring the reflected light paths overlap with those without a partition, thus improving display clarity.
Implementation Method 1
the surfaces of the partition that face the two light sources are reflective
Data Source
AI summary
A back light module and a flat display device using the same are provided. The back light module includes a reflector, at least two light sources and at least one partition. The light sources are disposed above the reflector. The partition is disposed at a substantially central location between the two light sources and is substantially perpendicular to a line connecting the two light sources. The partition is a plate having a uniform thickness, and surfaces of the partition that face the two light sources are reflective.