Optical bonding is the process that adheres cover lens, touch panel and LCD panel together with optical clear adhesives. The process is a key factor that affects LCD display performance, durability and total cost of ownership. Bifa provides skilled optical bonding and integration services to help improve display brightness and contrast ratio, as well as system ruggedness, shock and vibration resistance.
Optically Clear Adhesive (OCA)
OCA is used to add film-type of optically clear adhesive between the cover glass and LCD display for display panel assembly. Such an optical bonding is especially significant in sunlight conditions. OCA offers superior clarity and excellent adhesion to eliminate surface-to-surface air gap and reflections from the viewing area to achieve better clarity, color contrast and wider viewing angles.
Liquid Optical Clear Adhesive (LOCA)
LOCA is one of optical binding technologies widely used for smartphones and tablet devices. The liquid type bonding adhesive is re-workable and suitable for use on curve or uneven surfaces The technology allows thinner and lighter panel construction required for futuristic display designs.
Air Gap Bonding
Air gap bonding provides the most economic method for touch panel attachment with a yield rate up to 98%. The adhesive is applied to the inactive border around the viewing area between the display and touch panel. In the result it lacks support between the screen and LCD, which is prone to breakage and moisture. The internal reflecting between layers can lead to poor optical performance.
Post time: Sep-21-2019