Optical Bonding Services for TFT LCDs

Optical bonding is a process which increases screen readability in brightly lit and outdoor environments, but also greatly improves the mechanical strength of the display.

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What is optical bonding?

Optical bonding is a process which dramatically reduces the internal reflections produced between the coverlens, sensor and display layers by filling the air gaps in between those layers with optically clear adhesives. This not only makes a huge difference to screen readability in brightly lit and outdoor environments, but also greatly improves the mechanical strength of the display.

Optical Bonding Key Benefits

  • Improved readability in sunlight
  • Reduces reflections
  • Prevents condensation or fog on the display
  • Up to 4 times higher contrast ratio
  • Improved ruggedness and durability
  • Lower power consumption
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Optical Bonding FAQ

How much light is reflected from a display?

In a non-bonded panel, ambient light is reflected at both the front and rear surfaces of the coverlens and also from the front surface of the display immediately behind it. As much as 13% of ambient light incident on the display surface can be reflected into the user’s eye.

If the ambient light is particularly intense, such as bright electric lights or sunlight, the reflected light can overpower the backlight illumination and significantly impair readability.

Typical approaches to improve readability include increasing the backlight power or adding anti-reflective coating to the front of the coverlens.

optical bonding light reflection diagram showing how an air gap can cause reflections unlike optical bonding that doesn't have an air gap.

What are the mechanical benefits of optical bonding?

As LCDs and graphics panels are becoming the norm in products throughout offices, factories, entertainment venues, commercial kitchens, and the home, their ability to withstand accidental impacts, or vandalism is imperative.

When applied in combination with a suitable mechanical mounting, optical bonding can considerably increase the overall impact resistance to help the end-product achieve a desired IK rating. In addition, when combined with toughened or strengthened glass, optical bonding can help increase the vandal resistance of products such as security panels and ATM machines.

optical bonding mechanical benefits with touchscreen or pressure being applied to the display.
Optical Bonding

Are there alternatives to Optical Bonding?

Yes, there are different types of films and filters that can be added to the front of your Coverlens which will improve the viewability, including:

  • Anti-reflective coating
  • Anti-glare coating
  • Ultra-violet filter
  • Infra-red filters
Glass Coatings & Filters

What is the cost of Optical Bonding?

Although the process typically adds a few percent to the cost of the panel, the premium can be offset by savings in the cost of anti-reflective coatings and the benefits of lower backlight power. Optical bonding can offer many additional advantages besides simply enhancing visual performance.

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We aim to offer reliable and long-term solutions to our B2B customers. If you are a business and would like to discuss your display and/or embedded system requirements please contact us below