Micro LED Package Frame for RGB Pixel Transfer Efficiency
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Solution Overview
Problem
Existing technologies face challenges in integrating different micro light-emitting devices onto a wiring substrate without causing damage, while ensuring compactness and improving productivity in the transfer process.
Innovation Solution
A micro light-emitting device package is designed with a package frame supporting red, green, and blue micro light-emitting devices, connected by a common electrode and individual electrode pads, with insulating layers and transparent or metal electrodes for efficient electrical connection and compact mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If three separate micro light-emitting devices are transferred individually onto a wiring substrate, then each device can be precisely positioned, but the transfer process becomes complex and productivity decreases
Solution Approach 1:
The patent merges three separate micro light-emitting devices (red, green, and blue) onto a single package frame, enabling them to be transferred together as one unit. This combining approach allows three devices to be mounted simultaneously on a wiring substrate, significantly improving transfer process efficiency and productivity while reducing the complexity of performing three separate transfer operations.
2Productivity
If three micro light-emitting devices are mounted separately on the wiring substrate, then each device can be independently positioned, but the mounting structure becomes larger and less compact
Solution Approach 1:
The patent combines three micro light-emitting devices onto a single package frame with integrated electrode connections. This merging allows the three devices to be mounted together as one compact unit on the wiring substrate, improving mounting efficiency while minimizing the total area occupied compared to mounting three separate devices independently.
3Area of stationary object
If a common electrode structure is used to connect all micro light-emitting devices, then the number of electrode pads is reduced and compactness is improved, but the electrical connection complexity increases
Solution Approach 1:
The patent implements a common electrode structure that serves multiple functions: it provides electrical connection to all three micro light-emitting devices (red, green, and blue) simultaneously, acts as a shared reference potential, and reduces the total number of electrode pads required. This multi-functional common electrode simplifies the overall electrical connection architecture while maintaining compact package dimensions.
4Ease of operation
If individual electrode pads extend through the entire package frame for each device, then electrical connection is simplified, but the package frame height and overall device size increase
Solution Approach 1:
The patent transitions from a traditional vertical through-substrate electrode configuration to a lateral electrode arrangement where individual electrode pads extend only partially through the package frame and connect to the common electrode through lateral pathways. This dimensional reconfiguration reduces the package frame height while maintaining effective electrical connections among all components.
Data Source
AI summary
Provided is a micro light-emitting device package including a package frame including a first main surface and a second main surface extending parallel to each other, a red micro light-emitting device, a green micro light-emitting device, and a blue micro light-emitting device provided on the package frame, a common electrode pad extending from the first main surface to the second main surface of the package frame, individual electrode pads each extending from at least a portion of a lower part of each of the red micro light-emitting device, the green micro light-emitting device, and the blue micro light-emitting device through the package frame, at least one insulating layer extending along a side surface of each of the red micro light-emitting device, the green micro light-emitting device, and the blue micro light-emitting device, and a common electrode provided on top of the package frame and configured to electrically connect each of the red micro light-emitting device, the green micro light-emitting device, and the blue micro light-emitting device to the common electrode pad.