structure of touch screen optically bonded to LCD explained.
structure of cover lens optically bonded to LCD explained.
reflection index comparison between optical bonding and air bonding.

Optical Bonding

  • To apply optical bonding, an agent is used, usually chosen between optically clear adhesive (OCA), or the liquid optically clear adhesive (LOCA), otherwise known as the optically clear resin (OCR).
  • The OCA or the LOCA is then filled between the touch screen and the LCD module, this is the most commonly seen structure of optical bonding.
  • Other common structures of optical bonding includes Cover glass / LCD module and PMMA / LCD module.

  • Whether OCA or LOCA is chosen for optical bonding depending of the application of the product or the LCD used in the project.

  • By applying optical bonding, the air gap is eliminated and thereby reduces the reflective index and increases the brightness of the display resulting in enhance visibility.

  • Besides of enhancing optical performances, optical bonding also provides multiple benefits such as increasing impact absorption and preventing moisture and condensation from forming inside the module's gap, which is why optical bonding is not only useful for applications that demands better performing display, but also a commonly sought out solution in applications demanding ruggedness or environmental resistance. 

  • Miracletouch's optical bonding is all done in-house in our own facility located in Taiwan where we also manufacture the touch screens, our total solution for optical bonding provides an high FPY rate and very cost effective reworking system.

  • Miracletouch provides Standard /UV resistant / Wide Temp solutions for optical bonding. 
  • Optical bonding solutions may differs between resistive and projected capacitive touch screen, can be applied to products up to 24"

  • Please kindly contact our sales department for more details on our optical bonding services.