Photosensitive Resin Masking Layer for OGS Touch Panels
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Solution Overview
Problem
Conventional touch panel architectures face issues with uneven surfaces, complex manufacturing processes, and imprecise alignment, particularly with the one glass solution (OGS) technology, which limits productivity and aesthetic appeal.
Innovation Solution
A masking layer made from developable photosensitive resin compositions, comprising a white-color layer coated on a transparent substrate followed by a gray-color layer, providing a white appearance and effective masking of electrical circuitry while integrating with OGS technology for improved productivity and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a frame is installed to hold and protect the touch panel, then the structural support and protection are improved, but the outer surface becomes uneven and the smooth appearance deteriorates
Solution Approach 1:
The invention extracts the frame structure from the overall assembly and replaces it with a masking layer formed directly on the touch panel surface. This eliminates the need for a separate frame while maintaining the protective and aesthetic functions.
Solution Approach 2:
The invention uses a thin film masking layer made of photosensitive resin composition that can be applied directly to the touch panel surface. This thin film structure provides the necessary protection and aesthetic appearance without the bulk and unevenness of a traditional frame.
2Object-affected harmful factors
If a decorative layer is attached onto the top glass plate to mask the electrical circuitry, then the masking property is improved, but the manufacturing process becomes too complicated and productivity decreases
Solution Approach 1:
The invention merges the masking function with the touch panel fabrication process itself. The masking layer is formed using photosensitive resin composition that is applied and patterned during the same manufacturing sequence as the touch panel components, eliminating the need for separate decorative layer attachment steps.
Solution Approach 2:
The invention replaces mechanical attachment processes (gluing, bonding decorative layers) with a photolithographic process. The photosensitive resin composition is applied, exposed to light through masks, and developed to form the masking pattern, which is then cured to create the final masking layer. This substitution of mechanical processes with photolithographic processes significantly simplifies manufacturing.
3Object-affected harmful factors
If side frame screen-printing is used to mask the electrical circuitry, then the masking property is improved, but the structure becomes too complicated and thick, failing to meet lightweight and slimness design trends
Solution Approach 1:
The invention extracts the screen-printing process from the overall structure and replaces it with a direct application of photosensitive resin composition. This eliminates the need for separate side frame components and their associated mounting structures, significantly simplifying the overall device architecture.
Solution Approach 2:
The invention uses a thin film masking layer formed by applying and curing photosensitive resin composition directly on the touch panel surface. This thin film approach provides effective masking while maintaining the lightweight and slim characteristics required by modern design trends, in contrast to the thicker, more complex screen-printed side frame structures.
4Device complexity
If conventional screen-printing process is used with OGS technology, then the manufacturing process is simplified, but imprecise alignment occurs among laminated layers leading to poor productivity
Solution Approach 1:
The invention replaces the mechanical screen-printing process with a photolithographic process using photosensitive resin composition. This substitution enables precise alignment through optical exposure and light masking, eliminating the alignment precision problems associated with mechanical screen-printing while maintaining the simplified manufacturing process benefits of OGS technology.
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 masking layer enhances the color appearance and productivity of touch panel devices by ensuring a smooth outer surface and effective masking of electrical circuitry, overcoming the limitations of conventional screen-printing processes and integrating seamlessly with OGS technology.
Implementation Method 1
coating a white-color photosensitive resin composition on a peripheral region of one surface of a transparent substrate of a panel structure, developing the white-color photosensitive resin composition to obtain a cured composition layer
Implementation Method 2
developing the white-color photosensitive resin composition to obtain a cured composition layer, and then coating a gray-color photosensitive resin composition on the cured composition layer and developing the gray-color photosensitive resin composition, so that the gray-color photosensitive resin composition is cured
Data Source
AI summary
The invention relates to a masking layer. The masking layer produced by coating a white-color photosensitive resin composition on a peripheral region of a transparent substrate, developing the white-color photosensitive resin composition to obtain a patterned composition layer, coating a gray-color photosensitive resin composition on the cured composition layer and developing the gray-color photosensitive resin composition, so that the gray-color photosensitive resin composition is cured to obtain the masking layer having an optical density (O.D.) of ≧3.5. The masking layer is adapted for use on a touch panel or a flat panel display device. The masking layer shows a white color appearance when viewed from outside and serves as a white color decoration around the peripheral region of the device. The masking layer further comprises a gray colored sub-layer to mask the electrical circuitry disposed beneath the masking layer.