Micro LED Pixel Alignment Circuit With Switchable Transistors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current alignment process for micro LED displays using stamping is imprecise and prone to abnormalities, leading to misalignment of micro LED chips with their electrodes.
Innovation Solution
An electronic device and method that utilizes independent alignment electrodes and transistors to align each pixel independently through fluid or inkjet transfer, employing alignment transistors that are turned off during operation to ensure precise alignment and reduce signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stamping method is used to transfer and attach micro LED chips to electrodes, then the alignment process can be completed, but the alignment precision is poor and abnormalities occur frequently
Solution Approach 1:
The patent replaces the mechanical stamping method with an electric field-based alignment system. Alignment transistors generate electric fields that precisely position micro LED chips during transfer, eliminating the imprecision and abnormalities associated with mechanical stamping while maintaining efficient mass transfer capability
Solution Approach 2:
The patent introduces alignment transistors as intermediary components between the electrodes and the micro LED chips. These transistors act as mediators that generate controlled electric fields to guide and position the chips during the transfer process, ensuring precise alignment without direct mechanical contact
2Manufacturing precision
If independent alignment transistors are added to each pixel for precise alignment, then alignment precision improves, but circuit area increases
Solution Approach 1:
The patent segments the alignment function by providing dedicated alignment transistors for each pixel or pixel group, allowing independent alignment control. This segmentation enables precise positioning of each micro LED chip while maintaining overall circuit efficiency through localized alignment operations rather than requiring comprehensive alignment infrastructure across the entire display
3Stability of the object's composition
If alignment transistors remain connected during operation, then alignment can be maintained, but signal interference increases
Solution Approach 1:
The patent implements dynamic control of alignment transistors, switching them between active and inactive states as needed. During the alignment phase, transistors are activated to maintain precise positioning, but they are deactivated during normal operation to eliminate signal interference, thus dynamically adapting the system state to current operational requirements
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 approach enhances pixel alignment precision, reduces circuit area, improves component utilization, and minimizes signal interference, thereby improving the overall performance and reliability of micro LED displays.
Implementation Method 1
aligning the plurality of first electronic units by applying a first voltage to the first electrode and applying a second voltage to a second electrode of the first electrode pair through the first transistor
Data Source
AI summary
An electronic device includes a substrate, a transistor disposed on the substrate, an electrode disposed on the substrate and coupled to the transistor, and a plurality of electronic units disposed on the substrate and coupled to the electrode. The transistor is used to align the plurality of electronic units when the plurality of electronic units are in an alignment mode, and the transistor is turned off when the plurality of electronic units are in an operating mode.