Display Panel Light Emitting Element Alignment and Density Inspection
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Solution Overview
Problem
Current inspection and repair methods for display panels, particularly those with light emitting elements, face challenges in enhancing the alignment and density of these elements, leading to suboptimal performance and efficiency in display devices.
Innovation Solution
A method and device that involves acquiring images of the display panel under an electric field with ultraviolet and infrared light, determining alignment and density, and rearranging light emitting elements using an inkjet facility to improve their positioning and distribution, with the option to add more elements based on density analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional inspection methods are used for display panels, then the inspection process is simple, but the alignment degree and density of light emitting elements cannot be effectively improved
Solution Approach 1:
The inspection device is divided into multiple functional modules: a light source unit providing UV and infrared light, an electric field generation unit, an image acquisition unit with specific filters, and a repair unit. Each module performs a specific function, allowing the complex inspection process to be managed through modular components that can be independently optimized and maintained.
Solution Approach 2:
The inspection device integrates multiple functions into a single system: it can inspect alignment degree, measure density, detect defects, and perform repairs using the same device platform. The light source unit provides multiple wavelengths (UV and infrared) for different inspection purposes, and the image acquisition unit uses different filters for various measurement modes, enabling one device to perform what would traditionally require multiple separate instruments.
2Manufacturing precision
If conventional inspection methods are used for display panels, then the device structure is simple, but the density of light emitting elements cannot be effectively improved
Solution Approach 1:
The device acquires images of the display panel under controlled electric fields and light conditions, processes the images to determine alignment degree and density measurements, and uses this feedback information to guide repair operations. The system can identify areas with insufficient density and direct the repair unit to add light emitting elements specifically to those regions, ensuring precise control over final element distribution.
Solution Approach 2:
The inspection process utilizes changes in physical parameters to extract information about light emitting element density. By applying different electric fields and using specific wavelength light (UV and infrared), the system induces measurable changes in the optical properties of the elements, allowing density determination through image analysis without requiring physical contact or destruction of the panel.
3Measurement precision
If multiple light sources and electric fields are used for inspection, then the alignment and density measurement precision is improved, but the inspection process becomes more complex
Solution Approach 1:
The inspection process employs periodic action by sequentially applying different electric field conditions and illuminating with different light wavelengths in a controlled sequence. The light source alternates between UV and infrared illumination, and the electric field is applied in specific patterns, allowing the system to capture multiple types of information from the same panel through repeated measurements under varying conditions, thereby improving measurement precision through comparative analysis.
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 effectively enhances the alignment and density of light emitting elements, leading to improved display panel performance and efficiency by ensuring precise placement and adequate element distribution.
Implementation Method 1
The acquiring of the image may be performed by collecting fluorescence and excitation light emitted by the light emitting elements and imaging collected information
Implementation Method 2
forming an electric field in the display panel
Data Source
AI summary
An inspection device, and a method of inspecting and a method of repairing a display panel using the inspection device are provided. The method of inspecting the display panel including light emitting elements includes acquiring an image of the display panel, and determining an alignment degree of the light emitting elements in the display panel.