Best brilliance with optical bonding

The color brilliance and optical quality of a touchscreen are important product advantages and a sales-promoting product feature for many markets.

In order to achieve the best possible optical results, Interelectronix uses optical bonding at the customer's request. Optical bonding is probably the most advanced bonding process for the production of touch screens.

Optical bonding refers to the manufacturing process of bonding a touch sensor to the glass plate with a highly transparent liquid adhesive. The challenge with this process is the bonding of both components without any air entrapment.

The advantages are:

• Higher optical quality
• lower reflection
• higher robustness
• no condensation
• Longer lifespan
  
  Thanks to the gap-free bonding of the two components, a significantly better optical quality of the touchscreen is achieved. By gluing the glass panes over the entire surface, the refraction of light is noticeably reduced and at the same time the contrast is increased. This results in much lower reflection and better readability even in critical lighting conditions.

  Furthermore, the bonding noticeably improves the resistance of the surface glass. A bonded display is more stable and resistant to mechanical stress.

  Condensation excluded

  By filling the air gap between the glass pane and the touchscreen and the touchscreen as well as the touchscreen and display with highly transparent adhesive, no more moisture can penetrate, which prevents condensation.

  On the one hand, a longer service life is due to improved robustness against external influences.

  But also due to the fact that heat can escape to the outside by closing the insulating air gap between the glass panes. This results in improved heat dissipation, which has a positive effect on the service life of the electronic components.

  Military-proven bonding process

  Optical bonding originates from military technology and is now increasingly used in the production of very high-quality touchscreens.

  However, the production process is quite complex and complicated, which is why many manufacturers only offer simpler fastening methods.

  Interelectronix has many years of experience with the use of optical bonding in production and delivers high-quality touchscreens in excellent optical quality.

  Improved optics - low reflection

  In the usual production processes, there is always a minimum distance between the front glass and the film, which means that the color brilliance is significantly weaker than with the optical bonding bonding process.

  The highly transparent and index-matched adhesives used in optical bonding create a very clear representation of the elements appearing on the screen. The colors are brilliant and the optical quality is very good even in low light conditions.

  
  The optical bonding process can only be used in the production of capacitive technologies, since resistive technologies always require an air gap between the front panel and the sensor due to the pressure-based sensor technology.

  Improve robustness

  Optical bonding therefore not only leads to the best optical results, but also contributes significantly to the robustness of the touchscreen.

  The effect of laminated glass is achieved through the firm, full-surface and distance-free bonding of the surface glass with the touchscreen and display underneath. Due to this special design, the touchscreen is even better protected against external influences such as vibrations, shock waves or thermal stresses.

  Optical bonding therefore not only leads to a significant improvement in optical quality, but also makes a touchscreen much more robust and therefore particularly suitable for use in harsh working environments.