Micro LED Display Interconnect Using Elastic Contact Layers
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Solution Overview
Problem
Micro LED display devices face electrical coupling failures due to variations in the heights of micro LED pixels, which disrupt the electrical connection between CMOS cells and micro LED pixels.
Innovation Solution
A display device configuration featuring a first substrate, a second substrate, light-emitting elements, a driving circuit, elastic insulation sections, and conductive layers that maintain contact between the substrates and light-emitting elements, even with height variations, ensuring reliable electrical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rigid insulation sections are used to maintain structural stability, then manufacturing precision is improved, but adaptability to height variations of light-emitting elements deteriorates
Solution Approach 1:
The insulation sections are designed with elastic properties, changing the material parameter from rigid to flexible. This allows the insulation sections to deform elastically in response to height variations of light-emitting elements, maintaining electrical coupling without requiring precise manufacturing tolerances.
Solution Approach 2:
The insulation sections are designed to be dynamically adaptable through elastic deformation. Instead of being fixed in a rigid state, they can adjust their shape and position to accommodate variations in light-emitting element heights, ensuring continuous electrical contact.
2Adaptability or versatility
If elastic insulation sections are used to accommodate height variations, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
By selecting materials with appropriate elastic properties for the insulation sections, the system gains tolerance to height variations. The elastic modulus and other material parameters are chosen to provide sufficient compliance while maintaining structural integrity during assembly and operation.
3Reliability
If conductive layers are pressed against light-emitting elements by elastic insulation sections, then electrical coupling reliability is improved, but device complexity increases
Solution Approach 1:
The insulation sections and pressing function are merged into a single component. The elastic insulation sections simultaneously provide electrical insulation and mechanical pressing force to ensure electrical coupling, eliminating the need for separate pressing mechanisms and reducing overall device complexity.
Solution Approach 2:
The elastic insulation sections automatically adjust and apply pressing force to the conductive layers based on the height of the light-emitting elements. This self-adjusting mechanism ensures reliable electrical coupling without requiring external control systems or additional actuators.
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 reduces the likelihood of electrical coupling failures and enhances the reliability of the connection between the driving circuit and light-emitting elements, while also reducing electromagnetic noise and preventing light interference with the driving circuit.
Implementation Method 1
a first insulation section having elasticity and provided between the first substrate and the first light-emitting element, a second insulation section having elasticity and provided between the first substrate and the second light-emitting element
Data Source
AI summary
A display device includes: a driving circuit provided at a first substrate and configured to drive a first light-emitting element and a second light-emitting element; a first insulation section having elasticity and provided between the first substrate and the first light-emitting element; a second insulation section having elasticity and provided between the first substrate and the second light-emitting element; a first conductive layer provided between the first insulation section and the first light-emitting element, the first conductive layer being configured to be electrically coupled to the driving circuit and be pressed against the first light-emitting element; a second conductive layer provided between the second insulation section and the second light-emitting element, the second conductive layer being configured to be electrically coupled to the driving circuit and be pressed against the second light-emitting element; and a coupling portion configured to couple the first substrate and a second substrate.