Quick Details
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Perimeter Bonding
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​Best choice for Average lighting indoor applications
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Effective low-cost assembly solution
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Easily re-workable
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Full Optical Bonding
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Reduced reflections = increased contrast = improved viewability
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Increased durability, shock and vibration resistance
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​Best choice for high ambient lighting and outdoor applications exposed to direct sunlight
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Prevents dust and humidity from accumulating between the LCD and Touch Panel
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Multiple materials and methods based on application and LCD size
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Re-workable
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DCL offers expertise in selecting bonding methods.
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Optical Bonding
Optical bonding is a highly effective technique used in the assembly of touch panels or lenses to displays, offering significant benefits for enhanced visual performance and durability. By utilizing optically clear adhesives to fill the space between components, optical bonding reduces surface reflections and improves contrast ratios, resulting in better visibility, particularly in high ambient light conditions. Moreover, this method provides protection against humidity and dust accumulation, increasing the longevity and reliability of display solutions.
With various materials and curing processes available, optical bonding can be tailored to specific application requirements, offering versatility and customization. Whether for outdoor displays, automotive interfaces, or industrial equipment, optical bonding enhances both the aesthetics and functionality of display systems, making it a valuable solution for diverse industries.
Perimeter Bonding
Perimeter bonding is a cost-effective and widely utilized method for integrating touch sensors or lenses with displays, offering reliability and ease of implementation. This assembly technique involves attaching components using adhesive tape, gaskets, or machine-applied adhesives, providing a secure seal against dust and moisture intrusion. Despite leaving an air gap between components, perimeter bonding remains an efficient solution, particularly for applications where cost is a key consideration.
With options like seamless die-cut gaskets and UV or air-cured adhesives, perimeter bonding offers flexibility to meet various adhesion requirements and environmental conditions. Whether for consumer electronics, medical devices, or industrial machinery, perimeter bonding provides a practical and accessible solution for achieving seamless display integration and optimal performance.
Optical vs Perimeter Bonding
Bonding methods, or the attachment of a touch panel or lens to a display, is typically done two ways: a perimeter bond or a full optical bond. Which is best should be based on key objectives such as optical performance requirements, application environment, durability and budget considerations. DCL offers both methods and more importantly knows when and why to consider either for your application.
A PERIMETER BOND method applies adhesive around the edges of an LCD to attach a touch panel, leaving an air gap between the two components. Consequently, ambient light passes through three reflective surfaces, resulting in increased reflections, diminished contrast, and the potential for image washout.
OPTICAL BONDING bridges the gap between the LCD and Touch Panel using a transparent adhesive tailored to the materials being bonded. This method guarantees that ambient light reflects from a single surface, leading to decreased reflection and maintained contrast ratio in outdoor and high ambient lighting conditions.