Electrostatic Alignment of Charged Light Emitting Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in maintaining uniform luminance due to deviations caused by variations in the number of light emitting elements per pixel, leading to inconsistent image quality.
Innovation Solution
A method of manufacturing a display device involves forming an insulating layer on a panel with separated electrodes, applying a voltage to align and attach charged light emitting elements using static electricity, and utilizing a solvent to align these elements between the electrodes, ensuring a uniform number of elements per pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are attached to emission areas without precise alignment control, then the manufacturing process is simpler, but the luminance uniformity deteriorates due to variations in the number of light emitting elements per pixel
Solution Approach 1:
The patent replaces mechanical alignment methods with an electrostatic alignment system. A transfer electrode and alignment electrode generate an electrostatic field that automatically aligns and attaches light emitting elements to their precise target positions on the substrate, eliminating the need for complex mechanical positioning while achieving high luminance uniformity
Solution Approach 2:
The patent introduces a transfer electrode as an intermediary component between the light emitting elements and the substrate. This transfer electrode serves as a temporary holding and alignment platform, using electrostatic forces to position elements accurately before final attachment, thereby simplifying the overall alignment process while maintaining precision
2Productivity
If the number of light emitting elements per pixel varies, then the manufacturing process is faster, but the image quality deteriorates due to inconsistent luminance
Solution Approach 1:
The electrostatic alignment system enables high-speed attachment of light emitting elements while simultaneously ensuring precise positioning. The electric field automatically guides elements to their correct locations, allowing rapid manufacturing without sacrificing the consistency of element distribution across pixels, thus maintaining both productivity and image quality
3Manufacturing precision
If traditional alignment methods are used without electrostatic charging, then the manufacturing process is simpler, but the positioning precision of light emitting elements deteriorates
Solution Approach 1:
The patent replaces complex mechanical positioning systems with an electrostatic field-based alignment system. The transfer electrode and alignment electrode create controlled electric fields that precisely position light emitting elements without requiring complex mechanical stages or optical alignment equipment, achieving high positioning precision with a relatively simple system architecture
Solution Approach 2:
The patent utilizes changes in electrostatic field parameters (voltage, field distribution) to control the positioning and attachment of light emitting elements. By adjusting the electrical parameters of the transfer and alignment electrodes, precise element placement is achieved without mechanical complexity
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 reduces deviations in luminance by uniformly applying electrostatic charges and aligning light emitting elements, resulting in improved image quality and consistency across the display.
Implementation Method 1
attaching charged light emitting elements to the emission areas utilizing static electricity between the light emitting elements and the insulating layer
Implementation Method 2
partially removing static electricity from the insulating layer in the non-emission area by irradiating light to the non-emission area
Data Source
AI summary
According to a method of manufacturing a display device, an insulating layer is formed on a panel including a first electrode and a second electrode provided in each of emission areas and spaced apart from each other. A first voltage is applied to at least one of the first and second electrodes. Charged light emitting elements are attached to the emission areas using static electricity between the light emitting elements and the insulating layer.