Micro LED Unit Pixel Structure With Integrated ESD Protection
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Solution Overview
Problem
Micro LEDs in display apparatuses are prone to damage from external shocks and electrostatic discharge due to their small size, making handling and mounting challenging and increasing the risk of physical and electrical failures.
Innovation Solution
A unit pixel design incorporating a transparent substrate with light emitting devices and an electrostatic discharge (ESD) protector, such as a conductive line or Zener diode, to safeguard the micro LEDs from electrostatic discharge, facilitating easier handling and mounting while preventing damage from external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If micro LEDs are used to achieve high-resolution display, then display resolution is improved, but susceptibility to electrostatic discharge and physical damage increases
Solution Approach 1:
An ESD protection circuit is introduced as an intermediary component between the micro LED and the external environment. This circuit acts as a mediator that captures and dissipates electrostatic discharge before it reaches the micro LED, thereby protecting the delicate device while allowing the high-resolution display to function. The ESD protection circuit includes elements such as resistors and capacitors that form a protective network around the micro LED.
Solution Approach 2:
The patent implements ESD protection structures and circuits before the micro LED is exposed to potential electrostatic damage. By pre-configuring protection diodes, resistors, and other protective elements in the circuit path, the system creates a cushioning effect that absorbs harmful electrostatic energy before it can reach the micro LED, thus preventing damage in advance.
2Measurement precision
If micro LEDs with small area are used to increase pixel density, then display quality is improved, but handling and mounting difficulty increases
Solution Approach 1:
The patent combines multiple functions into an integrated structure where the ESD protection circuit is merged with the mounting substrate or package. By integrating the protection circuitry directly into the mounting structure, the system reduces the number of separate components that need to be handled individually, thereby simplifying the overall handling and mounting process despite the small size of the micro LED.
Solution Approach 2:
The patent employs thin-film ESD protection layers or flexible protective coatings that can be applied directly to the micro LED or its substrate. These thin-film structures provide ESD protection without adding significant bulk or complexity to the already miniaturized component, making handling and mounting easier while maintaining the small form factor required for high pixel density.
3Reliability
If ESD protection structures are added to protect micro LEDs, then reliability is improved, but device complexity increases
Solution Approach 1:
The ESD protection circuit is designed to perform multiple functions simultaneously: it protects against electrostatic discharge, provides electrical isolation, and serves as part of the mounting structure. By making the protection circuit multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while maintaining comprehensive protection.
Solution Approach 2:
The patent optimizes the parameters of the ESD protection components (such as resistance values, capacitance values, and breakdown voltages) to achieve effective protection with minimal component values. By carefully selecting parameters, the protection circuit provides adequate ESD protection while occupying minimal space and adding minimal complexity to the overall device structure.
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 unit pixel design enhances the reliability of micro LEDs by protecting them from electrostatic discharge and physical shocks, improving the handling and mounting process, and reducing the risk of damage during manufacturing and use.
Implementation Method 1
an electrostatic discharge (ESD) protector disposed on the transparent substrate, and protecting at least one of the light emitting devices from electrostatic discharge
Data Source
AI summary
A unit pixel includes a transparent substrate, a plurality of light emitting devices disposed on the transparent substrate, and an electrostatic discharge (ESD) protector disposed on the transparent substrate and protecting at least one of the light emitting devices from electrostatic discharge.