LED Light Source Module Dummy Chip Lateral Light Redirection
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Solution Overview
Problem
The light emitting efficiency of LED light source modules is reduced due to lateral light emitted from adjacent LED chips being absorbed by each other, rather than being utilized.
Innovation Solution
Incorporating a dummy chip with high reflectivity, located between LED chips on a substrate, to redirect lateral light emitted from the LED chips, rather than absorbing it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LED chips are arranged in an array on a substrate, then the light source module can be formed with compact structure, but the lateral light emitted from adjacent LED chips is absorbed by each other causing reduced light emitting efficiency
Solution Approach 1:
A dummy chip is introduced as an intermediary element positioned between adjacent LED chips. This dummy chip serves as a mediator that reflects lateral light from one LED chip toward the viewing direction, preventing the light from being absorbed by adjacent LED chips. The dummy chip thus enables the compact array structure to maintain high light emitting efficiency by managing the interaction between neighboring LED chips.
Solution Approach 2:
The lateral light that would normally be absorbed and wasted by adjacent LED chips is converted into useful light output. By positioning dummy chips with high reflectivity between the LED chips, the harmful lateral light absorption is transformed into beneficial light redirection, where the previously wasted lateral light is now reflected toward the front to contribute to the overall light output.
2Loss of energy
If dummy chip is placed between LED chips to redirect lateral light, then light emitting efficiency is improved, but device complexity increases
Solution Approach 1:
The light management function is segmented between different elements: LED chips generate light while dummy chips handle light redirection. This segmentation allows each component to be optimized for its specific function, with dummy chips specifically designed with high reflectivity sidewalls for efficient light redirection, while LED chips focus on light generation.
Solution Approach 2:
The dummy chip serves multiple functions simultaneously: it acts as a structural spacer to maintain proper spacing between LED chips, provides electrical connection pathways, and functions as a light reflector to redirect lateral light. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 dummy chip redirects lateral light, enhancing the light emitting efficiency of the LED light source module by preventing absorption and allowing the light to be reflected outward.
Implementation Method 1
a dummy chip with high reflectivity, located between LED chips on a substrate, to redirect lateral light emitted from the LED chips
Data Source
AI summary
A light source module includes a substrate, at least two light emitting diode (LED) chips and at least one dummy chip. The LED chips are disposed on the substrate. The dummy chip is disposed on the substrate and located between the LED chips. The LED chips, the dummy chip and the substrate are electrically connected to one another. The dummy chip is used to redirect a lateral light emitted from the LED chips.