Micro LED Array Inspection Tool with Segmented Optical Collectors
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Solution Overview
Problem
Conventional methods struggle to detect pixel defects in micro LED array panels due to their small light emitting area, and the optical collectors used cannot simultaneously collect images and light effectively, leading to decreased accuracy.
Innovation Solution
An inspecting tool comprising an optical collector group, an image detector, and a light measuring device, where the optical collector group includes a first optical collector aligned with the micro LED array and a second optical collector with a concave curved surface to collect light from the micro LED array, enhancing light collection and detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single optical collector is used to collect light from the micro LED array, then the collecting area is limited by the optical components inside, but the light amount entering the collector is insufficient
Solution Approach 1:
The optical collector is divided into multiple independent optical collectors (first optical collector for image detection, second optical collector for light measurement). Each collector can be optimized for its specific function without compromise, and together they provide a larger total collecting area while gathering sufficient light量.
2Productivity
If the image collecting process and light collecting process are performed at the same time through a single optical collector, then both functions are attempted simultaneously, but the light amount is weakened and accuracy decreases
Solution Approach 1:
The detection system is segmented into separate optical paths: one for image collection and one for light measurement. This allows simultaneous operation of both functions with sufficient light量 for each, maintaining high accuracy while improving overall detection efficiency.
Solution Approach 2:
The optical collector group serves multiple functions simultaneously - the first optical collector handles image detection while the second optical collector handles light measurement. Both functions are performed concurrently through the multi-functional optical collector group design.
3Area of stationary object
If the collecting area of the optical collector is made as small as the light emitting area of the micro LED array, then the collection is maximally focused, but the optical components inside the collector cannot be accommodated
Solution Approach 1:
By segmenting the optical collection system into multiple separate collectors, each can have a smaller individual collecting area that accommodates the necessary optical components, while the combined collecting area of all collectors matches the light emitting area of the micro LED array.
4Difficulty of detecting and measuring
If conventional detection methods are used for micro LED array panels, then the equipment is simple, but pixel defects cannot be easily detected and identified
Solution Approach 1:
The detection system is segmented into specialized components: an optical collector group for light collection, an image detector for capturing pattern images, and a light measuring device for measuring light emission. This segmentation enables effective defect detection in micro LED arrays while keeping each component relatively simple and manageable.
Data Source
AI summary
An inspecting tool for inspecting a micro LED array panel (00) includes: an optical collector group (01) configured to collect light emitted from a micro LED array included in the micro LED array panel (00); an image detector (02) connected with the optical collector group (01) to receive the light collected by the optical collector group (01), and configured to capture an image of the micro LED array; and a light measuring device (03) electrically connected with the optical collector group (01) receive the light collected by the optical collector group (01), and configured to measure the light emitted from one or more portions of the micro LED array. The optical collector group (01) is configured to receive the light emitted from any position of the micro LED array.