Mounting an Optically-Bonded LCD

There are few things more heartrending than buying liquid crystal displays, ensuring their safe transport, and handling them with extreme care, only to damage them irreparably during the mounting process. Because a liquid crystal display (LCD) is extremely sensitive to mechanical stress and susceptible to electrostatic discharge (ESD), careful considerations must be given to it when mounting. This is especially true when the display is optically bonded from the outside of the display frame. Failure to take proper precautions can result in panel failures, including permanent damage of circuits due to electrostatic discharges, brightness hot spots, delamination of the bond in ambient or elevated environments, cracking of the cover glass, and cracking of the LCD, among other catastrophes.

Mounting an optically bonded LCD

Though LCDs are rather fragile, simple yet effective practices exist that will enable you to complete the mounting project with little complication. First, the optically-bonded products must be handled with both hands from opposite edges of the display frame. Long before ever mounting the optically-bonded LCD, damage can occur through improper handling. It is also very important to note that, as with all electronic devices and components, proper ESD protection practices must be followed accordingly. An electric shock can easily sound the death knell for your optically-bonded LCD.

The mechanically stress-sensitive nature of liquid crystal displays requires customers to take special precautions when designing the mounting details for any given applications. As a general rule, the panel should be mounted evenly and reliably using the panel manufacturer’s mounting points. Absolutely no excessive stress should be applied to the optical surface and other parts of the the frame. When mounting the panel, ensure that it is in the correct position first, tightening the screws gently and evenly. It is highly recommended that a torque wrench be used to avoid over/under tightness.

Following these simple instructions will go a long way toward helping you complete your project without costly and time-consuming repairs.

© General Digital Corporation
© General Digital Corporation

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