Rotational Planar Light Source Layout for LCD Backlight Uniformity
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Solution Overview
Problem
Existing planar light sources for LCD backlights face limitations in layout structure efficiency, requiring numerous light emitting modules and connectors, which complicates electrical wiring and reduces luminance uniformity.
Innovation Solution
A planar light source design where light emitting modules and connectors are optimized by rotating the layout of light emitting elements and connectors around a central point, allowing for a simplified wiring structure and reduced module diversity, with modules arranged in a rotational layout to improve efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional linear layout structure of light emitting modules is used, then electrical wiring can be simplified, but the number of modules and connectors increases, reducing luminance uniformity and increasing device complexity
Solution Approach 1:
The patent applies asymmetry by positioning connectors at angular points (corners) of light emitting modules rather than at central or edge midpoints. This asymmetric placement enables a rotational layout where modules are arranged radially around a central region, reducing the total number of connectors needed while maintaining electrical connectivity and improving luminance uniformity across the display panel.
Solution Approach 2:
The patent implements a curved/rotational layout arrangement where light emitting modules are positioned in a radial pattern around a central region rather than in a linear or grid pattern. This curved arrangement, with modules at different angular positions, reduces the number of connectors required and improves luminance uniformity by distributing light sources more evenly across the viewing area.
2Manufacturing precision
If more light emitting modules are used to improve luminance uniformity, then lighting coverage increases, but the electrical wiring structure becomes more complex and productivity decreases
Solution Approach 1:
The patent applies universality by designing a standardized light emitting module that can be positioned at multiple angular positions in a rotational layout. Each module serves the same function and has identical connector placement, allowing for simplified manufacturing and assembly. This standardized design reduces the variety of components needed and improves assembly efficiency while maintaining luminance uniformity.
3Reliability
If connectors are disposed at multiple positions on light emitting modules, then electrical connectivity is ensured, but the wiring structure becomes more complex and manufacturing cost increases
Solution Approach 1:
The patent applies asymmetry by positioning connectors at angular points (corners) of light emitting modules rather than at central or edge midpoints. This asymmetric placement enables a rotational layout where modules are arranged radially around a central region, reducing the total number of connectors needed while maintaining electrical connectivity and improving luminance uniformity.
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
This design enhances light emitting efficiency, reduces the number of required modules and connectors, simplifies electrical wiring, and maintains luminance uniformity, thereby improving productivity and cost-effectiveness.
Implementation Method 1
a light emitting diode (LED) has a fast response time of about several nano seconds, thereby being effective for a video signal stream and enabling impulsive driving
Data Source
AI summary
A light source includes first to nth light emitting modules (n is a natural number that is two or more than two) each having a plurality of light emitting elements and connectors that are electrically connected to the light emitting elements. The connector of the first light emitting module is disposed near an angular point (hereinafter, referred to as “rotational central point”) of a region defining the first light emitting module. The light emitting elements and connector of the ith light emitting module has a layout structure defined by a clockwise or counter-clockwise rotation of the light emitting elements and connectors of the first light emitting module by an angle (i−1)/n×360° about the rotational central point, wherein i is a natural number which satisfies 2≦i≦n.