With unbonded LCD monitor device, several problems can occur. The most common is the display devices are less readable in sunlight resulting in glaring. Secondly, water vapor could condense in between cover glass and display when environmental temperature or air pressure varies.

Not sealing the system may solve the last problem to some extent. However, this may lead to another problem. Circulating air can bring dust into the air gap, which is one of the major factors that compromise visibility over time.  If it is being used under industrial circumstances, this will be an issue.

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Optical bonding is the technology to address these problems. Compared to an unbonded monitor device, optical bonded rugged monitor can reduce reflection by 65%, which means up to 65% increase in visibility. By filling the gap with silicone, it is obvious that fogging and dust are no longer the threats. In addition to these two features, optical bonding also provides extra viewing angle. The sturdiness of the screen will be increased as well. Silicone adhesive provides solid connection between cover glass and display, thus the screen can withstand more intense impact or shock. With all these advantages combined together, optically bonded devices are the best solution for reliable and study systems.

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Referring to the above picture, the surface is of optically bonded device yet the distance between the surface and fingertips can be easily seen on unbonded devices. This creates a better user experience when using the device.