Light Emitting Module With Mesh Conductor For Color Mixing
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Solution Overview
Problem
Existing light emitting modules with LEDs on flexible, light transmissive substrates face challenges in wiring without reducing light transmissivity, particularly when arranging multiple LEDs of different colors to achieve white or intermediate-color lighting.
Innovation Solution
A light emitting module design featuring a pair of flexible, light transmissive films with a conductor layer forming an L-shaped mesh pattern, connecting LEDs in series, and a resin layer between the films to maintain transmissivity and flexibility, allowing for efficient color mixing of red, green, and blue LEDs to produce white or intermediate colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LEDs of different colors are arranged adjacent to each other on a flexible substrate to achieve white light, then color mixing capability is improved, but light transmissivity of the substrate deteriorates due to wiring requirements
Solution Approach 1:
The patent uses a flexible substrate with integrated conductor patterns formed directly on it, eliminating the need for separate wiring layers that would block light. The conductor patterns are designed as thin, transparent, or minimally invasive structures that maintain the substrate's flexibility and light transmissivity while enabling electrical connection to multiple LEDs of different colors arranged adjacent to each other.
Solution Approach 2:
The patent arranges LEDs and conductor patterns in a planar configuration on the flexible substrate, utilizing two-dimensional space efficiently. By distributing LEDs and their corresponding conductor connections across the surface area rather than using layered vertical wiring, the design maintains high light transmissivity while achieving effective color mixing through adjacent placement of red, green, and blue LEDs.
2Reliability
If wiring is added to connect multiple LEDs on a flexible substrate, then electrical connectivity is improved, but the flexibility and light transmissivity of the substrate deteriorate
Solution Approach 1:
The patent combines the substrate and conductor patterns into a single integrated structure, where the conductor patterns are formed directly on the flexible substrate material. This merging eliminates the need for separate wiring layers or complex assembly processes, maintaining substrate flexibility and light transmissivity while ensuring reliable electrical connectivity to all LEDs.
Solution Approach 2:
The conductor patterns are designed as thin, flexible traces that conform to the substrate's flexibility. These thin film conductor structures do not significantly impede light transmission or mechanical flexibility, yet provide reliable electrical pathways to connect multiple LEDs arranged on the flexible substrate.
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 module achieves uniform light emission with adjustable color and intensity, maintaining high light transmissivity and flexibility by connecting LEDs in series and using a mesh conductor pattern, enabling efficient production of white and intermediate colors without compromising the substrate's properties.
Implementation Method 1
a plurality of first double-sided light emitting elements disposed between the first insulation film and the second insulation film, and each including a pair of electrodes on one surface, a plurality of second double-sided light emitting elements disposed between the first insulation film and the second insulation film adjacent to the respective first double-sided light emitting elements
Data Source
AI summary
A light emitting module according to an embodiment includes a first insulation film and a second insulation film with a light transmissivity, a plurality of first double-sided light emitting elements disposed between the first insulation film and the second insulation film, and each including a pair of electrodes on one surface, a plurality of second double-sided light emitting elements disposed between the first insulation film and the second insulation film adjacent to the respective first double-sided light emitting elements, each including a pair of electrodes on one surface, and emitting different light from the first double-sided light emitting element.