Conductive Light Confinement Walls for High-Resolution LED Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the field of light display screens, the accurate electrical connection and positioning of light-emitting diodes with micrometric or nanometric dimensions are challenging due to their small size, leading to high error rates and risks of short-circuits, especially when the diodes are three-dimensional and closely spaced.
Innovation Solution
An optoelectronic device with a support face and light elements electrically connected to conductive electrodes, where light confinement walls are both reflective and electrically conductive, allowing them to be directly connected to the electrodes, facilitating accurate positioning and reducing the risk of short-circuits while enabling high-resolution displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting diodes are separated by a distance of less than about ten microns to achieve high resolution, then display resolution is improved, but the risk of involuntary short-circuit increases due to the short distance between electrical connections
Solution Approach 1:
The patent introduces light confinement walls as intermediary structures between adjacent light-emitting diodes. These walls serve dual functions: optically confining light to improve extraction efficiency and electrically isolating adjacent diodes to prevent short-circuits. The walls are positioned between the diodes at distances less than ten microns, enabling high-resolution displays while maintaining electrical reliability through the mediating isolation function.
2Ease of manufacture
If conventional techniques are used for electrical connection of transferred light elements, then manufacturing process is simple, but positioning faults are random and error range is too high for best resolution
Solution Approach 1:
The patent applies preliminary action by pre-forming light confinement walls on the support substrate before transferring the light-emitting diodes. These walls are created with precise positioning and dimensions in advance, establishing a predetermined geometric framework. When diodes are subsequently transferred and positioned, they are guided into alignment with these pre-formed walls, ensuring accurate positioning without requiring complex real-time adjustment mechanisms during the transfer process.
Solution Approach 2:
The patent replaces complex mechanical positioning systems with a geometric constraint system. Instead of using sophisticated mechanical alignment tools or active control mechanisms during transfer, the invention uses the predetermined geometric shapes of the light confinement walls to passively guide and constrain the positioning of light-emitting diodes. This geometric constraint system achieves high positioning accuracy through the physical form of the walls rather than through complex mechanical adjustment systems.
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 solution enhances the electrical connection and positioning of light elements, reducing errors and short-circuit risks, enabling high-performance light displays with improved resolution and cost-effectiveness.
Implementation Method 1
each light confinement wall being configured so as to have an ability to reflect all or part of the light emitted by at least one of the light elements
Data Source
AI summary
An optoelectronic device for light display includes a support; light elements electrically connected to at least one first electrode and including a light-emitting diode of which a doped part is arranged in situation of electrical contact with the first electrode, the first electrode covering at least one upper part of the doped part arranged on the side opposite to the support face. Light confinement walls are configured to have an ability to reflect all or part of the light emitted by at least one of the light elements and being arranged so as to surround all or part of the at least one light element. The light confinement walls are electrically conductive and directly connected to the first electrode.