Luminary Optics

Why is Luminary Optics bonding better than others?

Optical bonding is no longer a new technology for enhancing displays.  There are many vendors who offer bonding; so what are the differences?  So why choose Luminary Optics over the others?  Consider the issues associated with bonding. Consider the years required to get good at bonding.  In theory, bonding is simple; merely glue a piece of glass to a display.  What's so hard doing that?  Plenty!  Bonding takes years to master and years of discovery as to what to do and not to do in the process.  Bonding is easy if you expect and pay for broken and contaminated displays.  Try doing it correctly, for over 10 years and to keep failed displays below 1%.  Suddenly, bonding becomes much more challenging.


Luminary Optics method for bonding:

Luminary uses silicone based materials in a proprietary formulation utilized in a direct “Over-the Bezel” style of bonding.  Why?  It is better.  The formulation is not merely silicone.  Our years of study and formulation development has created a tried and true material that has been subjected to the most stringent tests.   Our proprietary material has the highest adhesion and cohesion of most bonding materials and is superior to any “off-the-shelf” silicone formulation.  It can pass full Mil testing, including the “high altitude, rapid decompression” test. 

Using "over-the-bezel" gasket and fill method for bonding keeps the cover glass and display attached to each other throughout shock, vibration and most important, torsion stress.  In torsion stress, displays and cover glass naturally try to bend in separate directions.  This causes delamination.  Our method will not delaminate in most severe torsion conditions.

Best warranty in the business:

Bonding subjects the display to ESD and other handling issues.  Experience has shown that relative newcomers to bonding consider display failures of 2% or higher to be reasonable and common.  This “fallout” is unacceptable at Luminary.  Our years of bonding experience have taught us to have less than .5% failure.  Our failure rate is so low that we offer 100% coverage for the display if it should fail under our care.

Issues with other bonding materials:

Many bonding company’s have merely licensed themselves with bonding material companies.  These material companies are more interested in selling material than training and supporting their new licensees.  Moreover, these materials have properties that are known to have production issues with displays and applications.



  • UV cure: Screened glass and masking on the cover glass/touch prevents the UV bonding material from properly curing. The masking will prevent UV light from penetrating the glass and the bonding material will not cure.  It will remain fluidic causing a bonding failure and will create a mess.
  • Removing UV bonding: Some materials are all but impossible to remove or rework.  The material has such high adhesion, it is all but impossible to remove it from the display.  This lack of rework means that scrap and yield costs will be much higher, resulting in higher production costs.
Features of Optical Bonding:

•  Low reflective loss means higher contrast in high bright environments
•  500 nit displays become daylight viewable, 800 nit displays become full sunlight readable.
•  Backlight power can be reduced for a low power draw producing less heat.
•  Bonding eliminates the air gap preventing the “greenhouse” effect which causes heat rise.
•  The thermal transmission of the bonding material allows heat to conduct out of the display.
•  Bonded displays with better thermal management will prevent displays from going isotropic (clearing) and turning black.
•  The lack of an air gap prevents moisture from forming under the window in moist or humid environments
•  Bonding prevents contamination from collecting under the window.
•  Bonding ruggedizes the display preventing damage from shock and vibration
•  Bonding dampens the cover glass or touch screen; minimizing breakage.
•  Bonded displays pass safety tests. Broken cover glass is held in place and will not cause harm to the user.
•  Removable Process- the display, cover glass and touch screens can be salvaged.
•  In process reworkability ; production yields exceed 99.5%

Optical bonding

Premium method for reducing reflective loss

Optical Bonding offers the lowest overall reflection over any other method.  by eliminating or reducing reflective loss means that a display can maintain a high contrast ratio even in bright ambient conditions.