3D Parallax Barrier Replication via Scanning Light Exposure
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Solution Overview
Problem
The high cost of photo mask processes in conventional methods for fabricating parallax barriers limits the economic viability of mass production, and the use of parallel light sources results in insufficient irradiation brightness and prolonged exposure times, increasing production costs.
Innovation Solution
A method utilizing a scanning line focusing light source device with a cylindrical or semi-cylindrical optical system to focus light onto a photo resistor coated on a low-cost glass substrate, enabling quick exposure and reducing power consumption, while using a glass photo mask with a parallax barrier pattern for replication through photolithography processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a glass photo mask process is used to fabricate parallax barrier optical patterns, then manufacturing precision is improved, but production cost increases significantly
Solution Approach 1:
The patent uses a photolithography process to create a reusable photomask that can be replicated multiple times. The photomask contains the parallax barrier pattern and can be used to expose photoresist on multiple substrates sequentially, replacing the need for expensive hand-crafted glass photo masks while maintaining pattern precision.
Solution Approach 2:
The patent replaces the mechanical laser plotting process with an automated photolithography system using UV light exposure. This substitution eliminates the need for expensive glass photo masks and manual positioning, reducing production costs while maintaining manufacturing precision through automated alignment and exposure processes.
2Manufacturing precision
If a parallel light source is used for exposure, then manufacturing precision is maintained, but exposure time increases and power consumption increases
Solution Approach 1:
The patent employs a scanning beam exposure system that dynamically moves the light source across the photoresist surface. This dynamic scanning approach allows the system to achieve complete exposure faster than static parallel light sources while maintaining precision through controlled beam positioning and scanning speed optimization.
Solution Approach 2:
The scanning beam exposure process uses periodic illumination patterns where the beam systematically scans across the exposure area in repeated cycles. This periodic scanning action enables complete coverage of the photoresist layer more efficiently than continuous parallel illumination, reducing total exposure time while maintaining pattern fidelity.
3Loss of time
If a scanning line focusing light source device is used, then exposure time is shortened and power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent divides the exposure system into modular components: a light source unit, a scanning mechanism, and a focusing optical system. This segmentation allows each component to be optimized independently and simplifies the overall system architecture compared to a monolithic parallel light source system, making the increased complexity manageable through modular design.
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 reduces production costs by shortening exposure time and minimizing power consumption, facilitating cost-effective mass production of 3D parallax barriers with improved efficiency.
Implementation Method 1
the photo-sensitive agent 42 is then developed, hard-baked, and treated by other processes to form the parallax barrier optical pattern
Implementation Method 2
A method utilizing a scanning line focusing light source device with a cylindrical or semi-cylindrical optical system to focus light onto a photo resistor
Data Source
AI summary
A method for replicating production of a 3D parallax barrier is capable of transfer-printing a 3D parallax barrier pattern on a planar transparent substrate mainly with a glass photo mask having the 3D parallax barrier pattern through processes of photo resistor coating, exposure, and development by using a photolithography technology, thereby achieving the purpose of replicating production.