Direct dry film optical bonding ‐ A low‐cost, robust, and scalable display lamination technology

Abstract

A robust, repeatable, low-cost lamination process that utilizes pressure-sensitive adhesive (PSA) to directly bond substrates to displays, such as LC, OLED, plasma, and electrophoretic displays, has been developed. These substrates can vary in intent and serve as protective covers, reflection mitigation, heaters, filters, touch screens, environmental barriers, etc. The resultant assembly is very rugged (shock, impact, and vibration resistant), while maximizing optical performance. This paper briefly describes the traditional liquid bonding technologies and compares them to dry-film bonding. A section of the paper focuses on the enhanced optical and environmental performances of dry-film bonded displays. This paper may also serve as a brief review of optical-bonding technologies.

3D display considerations for rugged airborne environments

“…19,20,21 For example, lamination of cover glass to the front of the 3D display can significantly reduce reflections and improve high ambient contrast. The result is a 3D display that remains legible with good contrast across a variety of lighting conditions.…”

Review of the evolution of display technologies for next-generation aircraft

“…Optical bonding is leveraged in the 5ATI and 15.1-inch displays to significantly lower display reflectance as detailed in the referenced literature. 19,20,21 …”

Direct‐Dry‐Film Optical Bonding: Finding New Applications

“…These materials reduce the specular reflectance further and increase the display contrast and legibility significantly in high ambient lighting. 2,5,6 The optical bonding of many components reduces the total reflectance of the stack drastically. It also improves the environmental performance and structural integrity of the display stack simultaneously and provides design flexibility.…”

“…Further reduction in CR may come from the diffuse surfaces and diffuse light contributions [Eq. ( 2)]. The maximum high ambient lighting is substantially higher for commercial avionics (8000 fC diffuse) and fighter planes (10,000 fC diffuse + 2000 fL specular).…”