Optical bonding has been around since the 1990s and is a technology that has been adopted in many different industries. It is defined as the permanent joining of two optically clear materials with an adhesive, such as silicone gel, epoxy or urethane The result is a hermetic seal that protects the internal components from dust, water, and other contaminants.

There are many benefits to optical bonding, including improved durability, better optical clarity, and reduced reflection. This technology can be used on LCDs, touchscreens, and other display devices.

One of the key advantages of optical bonding is that it improves the durability of the display. By bonding the display to the touchscreen or cover glass, it creates a stronger and more robust overall structure. This can help to protect the display from impacts and other types of damage.

Optical bonding also typically results in better optical clarity. By filling in the gaps between the cover and the rest of the device, it reduces internal reflections and improves the overall contrast ratio. This can make the display easier to read in direct sunlight or other high-contrast conditions.

Finally, optical bonding can also help to reduce reflections. By filling in the gaps between the cover glass and the display, it minimises the amount of light that is reflected back at the user. This can make the display easier to use in brightly lit environments.

Optical bonding is the preferred option for project applications where the highest levels of durability, optical clarity, and reflectivity are required, such as transportation and outdoor digital signage.

Key benefits:

• Improved durability
• Better optical clarity
• Reduced reflections
• Improved contrast ratio
• Greater sunlight readability
• No condensation or fogging
• Zero contamination (dust or dirt)
• Improved heat dissipation (heat can dissipate through the front glass)

Applications:

• Transportation
• Outdoor digital signage
• EV Chargers
• Medical
• Instrumentation

Optical bonding market share currently stands at about 15% and is estimated to grow to 30% by 2025. The main reasons for this growth are the ever-increasing demand for high durability displays in public view applications and the continued miniaturisation of devices which necessitates better optical clarity.

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