Types of Touchscreen Bonding
When bonding a touchscreen sensor to an LCD, there are several bonding options, each with its own advantages and applications. UICO offers many options for bonding and films/coatings to make your experience reliable and functional with clarity. Here are the primary types OF UICO touchscreen bonding options below:
Types of Bonding
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AIR GAP BONDING:
In this method, the touchscreen is placed over the LCD with a small air gap between the two layers.
OPTICAL BONDING:
This involves applying a layer of optical adhesive between the touchscreen and the LCD, eliminating the air gap.
LIQUID OPTICALLY CLEAR ADHESIVE (LOCA) BONDING:
A type of optical bonding where a liquid adhesive is applied between the touchscreen and LCD, which is then cured using UV light.
DRY BONDING:
This method uses pre-cured optically clear adhesive (OCA) film instead of liquid adhesive.
DIRECT BONDING:
The touchscreen and LCD are directly bonded using high-pressure and high-temperature processes.
Advantages
AIR GAP BONDING:
Lower cost, easier to replace components, less risk of damage during assembly.
OPTICAL BONDING:
Improved optical clarity and contrast, better sunlight readability, increased durability, reduced reflections and parallax, enhanced ruggedness.
(LOCA) BONDING:
High bond strength, excellent optical clarity, improved impact resistance.
DRY BONDING:
Faster assembly process, no need for UV curing, less risk of adhesive yellowing.
DIRECT BONDING:
Extremely durable, excellent optical performance, very thin assembly.
Disadvantages
AIR GAP BONDING:
Lower optical clarity, potential for dust and moisture to enter the gap, reduced durability and performance in outdoor environments.
OPTICAL BONDING:
Higher cost, more complex manufacturing process, more challenging to repair or replace components.
(LOCA) BONDING:
Longer curing times, potential for adhesive yellowing over time, more difficult rework process.
DRY BONDING:
Requires precise alignment, potentially higher material costs compared to liquid adhesive.
DIRECT BONDING:
Very high cost, complex manufacturing, not suitable for all applications due to the high stress involved in the bonding process.
Types of Touchscreen Film Coatings
UICO Projected Capacitive (PCAP) touch screens have earned their reputation for exceptional durability through a combination of multi-layer construction, scratch-resistant cover glass, impact resistance, sealed design, water and chemical resistance, uniform surface, rigorous testing, versatility in high-use environments, and ongoing technological advancements. The culmination of these factors results in touch screens that can withstand the rigors of daily use, making them a preferred choice for applications where longevity and reliability are paramount.
Click to learn more about perimeter bonding vs full optical bonding.
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