Micro LED Panel Interconnect Layout for Optical Isolation
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Solution Overview
Problem
The spatial constraints in micro LED display panels due to the need for extensive electrical connections between light emitting mesas limit the density and efficiency of micro LEDs, leading to reduced light emitting performance and increased power consumption.
Innovation Solution
The implementation of a micro LED display panel with a micro LED array and integrated circuit backplane, featuring interconnected structures that electrically connect light emitting mesas from top to bottom, providing optical isolation and improving light emitting efficiency by preventing light cross-talk between adjacent micro LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each light emitting mesa is electrically connected to a respective electrode for independent control, then each light emitting mesa can be controlled independently, but the connections occupy significant space within the micro LED display panel, constraining the arrangement of more micro LEDs
Solution Approach 1:
Multiple light emitting mesas share common electrical connections through the interconnected structures. The first and second interconnected structures provide common electrical pathways that serve multiple mesas, reducing the total number of connections needed while maintaining independent control capability through the IC backplane.
Solution Approach 2:
The electrical connections are extended into the vertical dimension by forming interconnected structures that extend from the front surface through the substrate to the back surface. This three-dimensional connection approach reduces the lateral space required for connections on the front surface, allowing higher density arrangement of micro LEDs.
2Object-generated harmful factors
If interconnected structures are provided around light emitting mesas to provide optical isolation, then light cross-talk between adjacent micro LEDs is prevented, but the interconnected structures increase the complexity of the electrical connection system
Solution Approach 1:
The interconnected structures serve dual functions: they provide optical isolation between adjacent micro LEDs to prevent light cross-talk, and simultaneously serve as electrical connection pathways to connect light emitting mesas to the IC backplane. This multi-functionality reduces the need for separate isolation structures, simplifying the overall device complexity.
Data Source
AI summary
A micro LED display panel includes: a micro LED array including a plurality of micro LEDs; an integrated circuit (IC) backplane formed at a back surface of the micro LED array; and a plurality of interconnected structures configured to electrically respectively connect the light emitting mesas. The interconnected structures include one or more top interconnected structures configured to electrically connect to a top of each one of the two or more light emitting mesas and be bonded with the IC backplane, and one or more bottom interconnected structures each configured to electrically connect to a bottom of one of the two or more light emitting mesas and be bonded with the IC backplane, the interconnected structures being formed around the two or more light emitting mesas, a top of the plurality of interconnected structures is equal to or higher than a top of a top-most light emitting mesa.