Light Emitting Module Uniformity via Quadrilateral LED Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor light emitting devices produce directional light, leading to non-uniformity and increased substrate area requirements, making it difficult to reduce manufacturing costs while maintaining light properties.
Innovation Solution
A light emitting module with a diffusion plate and a light source substrate featuring a quadrilateral pattern of LEDs, where the distance between LEDs is optimized to ensure uniform light distribution through a specific ratio of the diffusion plate distance to diagonal distances, allowing for reduced substrate area and cost-effective production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of semiconductor light emitting devices is reduced to lower manufacturing costs, then manufacturing cost decreases, but light uniformity deteriorates
Solution Approach 1:
The light source array is segmented into multiple groups with different lighting states. The controller divides the light sources into first groups (first lighting states) and second groups (second lighting states), enabling independent control of different segments to achieve uniform light distribution while using fewer active light sources
Solution Approach 2:
The lighting system transitions from a static on/off state to a dynamic multi-state system. The controller adjusts lighting states between different groups of light sources, creating temporal and spatial variations in light emission that compensate for reduced light source density and maintain uniformity
2Area of stationary object
If spacing between semiconductor light emitting devices is increased to reduce substrate area, then substrate area decreases, but light uniformity deteriorates
Solution Approach 1:
The solution moves from a two-dimensional spatial arrangement problem to a three-dimensional solution by adding the time dimension. Through temporal switching between different light source groups, the system creates a dynamic light distribution pattern that achieves uniformity without requiring dense spatial packing of light sources
3Productivity
If semiconductor light emitting devices are used, then light output efficiency increases, but light uniformity deteriorates due to highly directional light
Solution Approach 1:
The system implements periodic switching between different groups of light sources. By alternately activating first groups and second groups with different lighting states, the system creates a periodic light emission pattern that averages out directional effects and produces uniform overall illumination while maintaining high efficiency LED operation
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 achieves improved light uniformity and reduced material usage, enabling cost-effective manufacturing of light emitting modules with maintained light properties.
Implementation Method 1
a light emitting module having improved light uniformity through a design and a layout of a light source substrate and light sources... configured to emit light to be diffused through a diffusion plate
Data Source
AI summary
A light emitting module is configured to provide substantially uniform lighting using a plurality of lighting sources. The light emitting module includes a diffusion plate disposed at a set distance from the light emitting module. A light source substrate has a substantially quadrilateral outer perimeter with at least one gap formed therein, and a plurality of light sources are disposed on the light source substrate according to a repeated quadrilateral pattern. A distance between adjacent light sources in the repeated quadrilateral pattern is selected based on the set distance h from the diffusion plate to the light emitting module, and on a greater of two diagonal distances x, y of the quadrilateral pattern. The diffusion plate diffuses light emitted by the light sources to provide substantially uniform light. Various other aspects of the light emitting module are additionally described.