Optical Bonding

Optical Bonding
Optical bonding is the process of adhering two or more substrates (eg. LCD and touch or cover glass) with optical clear adhesives.
The optical bonding process of Twinwill applies both gel adhesives (dry bonding) and liquid adhesives (wet bonding). If compared
to the traditional way for attaching LCD and touch panel by applying double-sided tapes on the four edges (air-gap bonding),
the main disadvantage of air-gap bonding is that internal reflecting surfaces leads to degradation of optical performance.

 

The advantages of Optical Bonding include:
* To reduce internal reflection to achieve sunlight readability
* To enhance ruggedness and shock and vibration resistance
* To enhance moisture resistance
* To prevent condensation under low temperature
* To increase brightness
* To improve contrast ratio
* To enlarge viewing angle

 

 

Advantage of Twinwill’s Optical Bonding
** Re-workable, materials loss(for LCD and TP) is much lower than competitors
** Good bonding gap/thickness control
** Optional dry bonding or wet bonding
** No delay bubble
** No yellowish issue after years
** Low air pressure resistivity (1hr @ 15000m high)
** Comparison of Dry Bonding and Wet Bonding
 

The Comparison between Dry Bonding vs Wet Bonding

Items Dry Bonding Wet Bonding
Quality Control Very good Good
Reworkability High Low
Bonding Strength Normal Very good
Twist Resistivity Normal Good
Production Rate Fast Slow
Optical Performance Excellent Excellent
Yield Rate Very high High
Screen Size Up to 27” Up to 27”
Thickness Control Very good Normal
Internal Shear None Some
Cleaning None Necessary

Post time: Nov-05-2019
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