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Display Enhancement Films

What are Brightness Enhancement Films?

When you’re known for making displays brighter, lighter-weight and more energy efficient, you have to have the technology to create those great displays consistently. 3M has three families of products that serve as the backbone of the LCD device industry. 3M™ Brightness Enhancement Film (BEF) and 3M™ Dual Brightness Enhancement Film (DBEF) are recycling, light management films that are used to increase the brightness of backlights used in liquid crystal displays (LCD). The brightness increase can be the primary goal or it can be translated to power savings or thermal management. 3M Enhanced Specular Reflector (ESR) can be used to increase the overall efficiency of the backlight while increasing the amount of light sent to the viewers.

Brightness Enhancement Film (BEF)

3M™ Brightness Enhancement Film (BEF)

3M BEF is a prismatic film that manages the angular output of light from the backlight. BEF uses refraction to compress the backlights output towards an on-axis viewer. BEF films can be used as single sheets or as two sheets crossed at 90 degrees to each other for greater brightness. BEF is available in different configurations that can be useful for specific application needs. 3M BEF is often used in conjunction with 3M DBEF and 3M ESR.


Dual Brightness Enhancement Film (DBEF)

3M™ Dual Brightness Enhancement Film (DBEF)

3M DBEF is a multilayer reflective polarizer. DBEF polarizes the output from the backlight so that it can transmit through the liquid crystal panel. Light of the wrong polarization is recycled back into the backlight. The recycled light would normally be absorbed, and lost, by the rear polarizer of the liquid crystal panel. DBEF increases both brightness and the amount of light available over the entire LCD. DBEF is available in different configurations that can be useful for specific application needs. 3M DBEF is regularly used in conjunction with 3M BEF and 3M ESR.


Enhanced Specular Reflector (ESR)

3M™ Enhanced Specular Reflector (ESR)

3M ESR is the world’s most reflective – and completely non-metallic – mirror. Your bathroom mirror reflects about 80% of the light, while 3M ESR reflects more than 98% of light. Very thin and extremely lightweight, 3M ESR is used as the backlight reflector for LCDs. ESR provides reflectance, across the entire visible spectrum, to maximize the recycling efficiency of backlights for LCD's. 3M ESR is often used in conjunction with 3M BEF and 3M DBEF.


Technical Specifications