Optical Display Excluding Device Roller Curvature and Tape Transfer
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Solution Overview
Problem
Conventional defect excluding devices for optical display manufacturing systems face issues such as damage to polarizing plate tapes due to acute peeling claw tips, over-tension leading to film rupture, and the need for precise control to avoid damaging non-defective tapes or failing to remove defective ones, along with adhesive-related failures like scratches and dirt.
Innovation Solution
An optical display device manufacturing system employing an excluding device with a roller for exclusion having a circular cross-sectional shape, which uses a tape member wound around the roller to attach and take up the defective optical member, allowing for precise exclusion without damaging other components and simplifying the control mechanism, while using a peeling device with a knife edge to remove the release film without contact with the optical display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tip of the peeling claw is pressed against the polarizing plate tape to form a bent portion, then the defective polarizing plate can be peeled off, but the polarizing plate tape may be damaged due to the acute angle of the tip
Solution Approach 1:
The invention replaces the acute-angled peeling claw tip with a rounded tip having a radius of curvature of 0.5mm or more. This curved geometry allows the tip to form a bent portion in the polarizing plate tape without concentrating stress at a sharp point, thereby preventing damage to the tape while maintaining the ability to peel off defective plates effectively.
2Manufacturing precision
If the peeling claw is precisely controlled to press against the cutting stripe, then the defective polarizing plate can be excluded, but the control mechanism becomes complex
Solution Approach 1:
The invention performs preliminary actions by pre-forming a bent portion in the polarizing plate tape before the cutting process. The rounded tip creates this bent portion that naturally guides the tape separation, eliminating the need for precise real-time control during the exclusion process. This preliminary preparation simplifies the overall control mechanism while maintaining high exclusion precision.
3Reliability
If the feed direction of the peeling claw is reverse to that of the separator, then the defective plate can be transferred to the film, but the contact surfaces of the pressure-sensitive adhesive layers may rub against each other causing failures
Solution Approach 1:
The invention introduces the bent portion in the polarizing plate tape as an intermediary element between the peeling claw and the separator film. This bent portion acts as a buffer zone that separates the contact surfaces of the pressure-sensitive adhesive layers, preventing them from rubbing against each other during the transfer process while still enabling effective defective plate transfer to the film.
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 system effectively excludes defective optical members without damaging the first optical member or the manufacturing system components, improving yield by ensuring precise removal and reducing operational complexity and costs through synchronized speed control and strategic positioning of the excluding device.
Implementation Method 1
a first pressure-sensitive adhesive layer F14 interposed therebetween... a second pressure-sensitive adhesive layer F24 interposed therebetween
Data Source
AI summary
An optical display device manufacturing system for bonding a first optical member to an optical display unit, comprising an excluding device for excluding a second optical member as an object to be excluded from a long release film that carries the first and second optical members, wherein the excluding device includes a tape member; a tape member rolling means on which the tape member is rolled; a roller for exclusion around which the tape member unrolled from the tape member rolling means is wound; a drive mechanism for shifting the roller for exclusion; and a take-up means for taking up the tape member wound around the roller for exclusion, wherein the excluding device being configured so that when the roller for exclusion is shifted, the second optical member is attached to the tape member and taken up.