Pattern Phase Difference Film Mass Production via Mask Exposure
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Solution Overview
Problem
Current methods for producing pattern phase difference films for passive-type 3D displays face challenges in mass production due to high costs and time-consuming processes, particularly involving expensive glass substrates and laser machining, which hinder the development of large-area films with high accuracy.
Innovation Solution
A method involving the use of an elongated transparent film material, where a photo-alignment material film is formed and exposed using a mask with a slit width smaller than the area width, allowing for sequential processing to create phase difference layers for right-eye and left-eye areas, enabling mass production with high accuracy by adjusting exposure processes and mask configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If glass substrate and laser machining are used to produce pattern phase difference film, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive glass substrates with flexible film substrates that can be easily disposed of or replaced. The film-based approach eliminates the need for complex laser machining equipment while achieving the required pattern accuracy through photo-alignment processes, directly addressing the contradiction between manufacturing precision and device complexity
Solution Approach 2:
The patent substitutes mechanical laser machining with a photochemical exposure process. Instead of using high-energy laser beams to etch patterns, the invention uses light exposure through masks to create phase difference patterns on film substrates, thereby replacing complex mechanical/optical machining systems with simpler photo-processing equipment
2Manufacturing precision
If laser scanning is used to irradiate the entire circumference of the roll plate, then manufacturing precision is improved, but productivity decreases and cost increases
Solution Approach 1:
The patent prepares masks with predetermined slit patterns before the exposure process. These pre-designed masks contain all the necessary pattern information, allowing the exposure process to proceed rapidly without real-time scanning or adjustment. The preliminary preparation of masks enables high-speed continuous processing while maintaining precise pattern reproduction
Solution Approach 2:
The patent employs periodic exposure cycles where the film substrate passes through exposure zones at controlled intervals. The continuous belt structure allows repetitive exposure of different sections in a rhythmic manner, optimizing both precision and throughput by eliminating the need for continuous scanning while maintaining accurate pattern formation
3Manufacturing precision
If mask with slit width smaller than area width is used in exposure process, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the exposure mask into multiple discrete slit regions, each corresponding to a specific pattern area. By segmenting the mask into distinct functional zones with appropriate slit widths, the system achieves high pattern definition accuracy while keeping each individual slit design simple and manufacturable, thereby resolving the contradiction between precision and 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 simplifies and cost-effectively produces pattern phase difference films with high accuracy, preventing the occurrence of stripe-shaped brightness differences and enabling efficient passive-type 3D display capabilities.
Implementation Method 1
forming an alignment film by performing an exposure process on the photo-alignment material film
Data Source
AI summary
A pattern phase difference film, which is used to display 3D images using a passive system, and provides a method for producing a pattern phase difference film that can be manufactured with high precision, easily and in large quantities. A mask, which has slits that are made narrow compared to the width of a region that is to undergo exposure treatment and are provided for exposure treatment, is manufactured.