Film Package Light-Blocking Layout for Inspection and Cutting
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Solution Overview
Problem
Conventional film packages lacking a driver IC chip do not exhibit a difference in light transmittance, making defect inspection challenging, and lack a reference point for accurate cutting, leading to potential defects in display devices.
Innovation Solution
Incorporating a light blocking member between pad wires on the film package's base substrate, which creates a difference in light transmittance for defect detection and serves as a reference point for precise cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a film package without a driver IC chip is used, then the device structure is simplified and cost is reduced, but defect inspection becomes difficult due to uniform light transmittance
Solution Approach 1:
A light blocking member is disposed on the base substrate to create a light blocking region with different light transmittance characteristics. This causes reflected light to exhibit different luminance values in different regions, enabling inspection devices to detect defects through luminance differences without requiring complex package structures.
2Ease of manufacture
If a film package without a driver IC chip is used, then manufacturing cost is reduced, but cutting precision becomes difficult due to lack of reference point
Solution Approach 1:
The light blocking member creates distinct luminance regions in reflected light, serving as an optical reference point. This enables cutting devices to accurately identify cutting positions based on luminance differences, achieving precise cutting without requiring a driver IC chip as a physical reference.
3Measurement precision
If a light blocking member is added to the film package, then defect inspection accuracy is improved through light transmittance difference, but device complexity increases
Solution Approach 1:
The light blocking member is a simple structural element that creates optical contrast through light blocking. It enables defect detection by generating luminance differences in reflected light without requiring complex multi-layer structures or additional functional components, thus improving inspection accuracy with minimal complexity increase.
Solution Approach 2:
The light blocking member acts as an intermediary element that mediates between the inspection device and the film package. It creates an optical reference that facilitates defect detection by the inspection device without requiring the film package itself to have complex inspection-friendly structures.
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 light blocking member enables accurate inspection of defects and ensures precise cutting of the film package, reducing defect rates in display devices by providing a clear difference in light transmittance and acting as a reference point during the manufacturing process.
Implementation Method 1
A light blocking member is disposed between the first pad wires and the second pad wires
Data Source
AI summary
A film package includes a base substrate having a bottom surface that includes a first portion and a second portion that are spaced apart from each other. First pad wires are disposed on the first portion of the bottom surface of the base substrate. Second pad wires are disposed on the second portion of the bottom surface of the base substrate. A light blocking member is disposed between the first pad wires and the second pad wires.