Optical Bonding
Optical bonding is the process of bonding a touch screen to a LCD display without an air gap using a highly transparent liquid adhesive. The space between the display and the front screen is filled with a filler whose quality is adjusted by calculated metrics, which significantly improves contrast and minimises reflections compared to non-bonded displays.
What are the advantages of optical bonding?
Optimum contrast ratio - no reflections
Optical bonding produces two main optical effects: improved contrast and reduced reflections
In order to improve the optical quality, the process fills the space between the display and the front screen with a transparent material adapted to the optical refractive index of the touch module and the display, resulting in a significant increase in contrast compared to non-bonded displays. This results in a display with excellent readability, clear contrast and low reflection, even under extreme lighting conditions.
What are the disadvantages of optical bonding?
It is difficult to repair. With optical bonding, protective glass or touch screen glass is bonded to the TFT display while remaining visually transparent. Bonding is difficult to eliminate and repair costs are often not economically feasible.