3M Display Materials & Systems Division

2021 Technical Data

3M™ Brightness
Enhancement Films(BEF)• BEF3-T-155n Auto
• BEF3-T-205 ASn Auto
• AEF-155

Product Description
3M™ Brightness Enhancement Films (BEF)
manage the angular output of light from liquid
crystal display backlights. 3M BEF films use aprismatic structure to focus light towards
on-axis viewers of the display. 3M BEF films canbe used alone or two films can be crossed at 90
degrees to each other.

Construction/Performance
Product

3M BEF3-T-155n Auto

3M BEF3-T-205 ASn Auto3M AEF-155

Effective Transmission 1.53

1.52

1.69

Caliper (microns)

155 ± 10205 ± 15155 ± 10

Prism Angle (degrees)

9090

90

Prism Pitch (microns)

50

50

50

Non-halogenated

Yes

YesYes3M™ Brightness Enhancement Films (3M BEF)

Automotive Environmental Testing
Condition

Time

High Temperature 95°C

1000 hours

Low temperature-40°C

1000 hours

Temperature/
Humidity

65°C/90%RH

1000 hours

Thermal Shock-40°C to 95°C

1 hour dwell/
100 cycles

Automotive Display – Recommended Solutions
Partial Instrument Cluster

Full Instrument Cluster

Center Stack

High Axial Brightness

High Efficiency

Minimal Windscreen Reflection

3M DBEF-D2-400 Auto

3M ALCF-A3+

3M BEF3-T-155n Auto

3M BEF3-T-155n Auto

3M BEF3-T-155n Auto

Bottom Diffuser

Bottom Diffuser

Bottom Diffuser

LGP

LGP

LGP

3M ESR Auto

3M ESR Auto

3M ESR Auto

Axial Luminance = 974 nits
Gain = 2.8

Axial Luminance = 836 nits
Gain = 2.4

Axial Luminance = 706 nits
Gain = 2.1

3M DBEF-D2-400 Auto
3M BEF3-T-155n Auto

3M™ Brightness Enhancement Films (3M BEF)

Technical Information
The technical information, recommendations and otherstatements contained in this document are based on tests
or experience 3M believes reliable, but the accuracy orcompleteness of such information is not guaranteed.

Product Use
Many factors beyond 3M’s control and uniquely within
the user’s knowledge and control can affect the use andperformance of a 3M product in a particular application.
Given the variety of factors that can affect the use andperformance of a 3M product, user is solely responsible
for evaluating the 3M product and determining whether
it is fit for a particular purpose and suitable for the user’smethod of application.

Warranty, Limited Remedy, and Disclaimer
Unless an additional warranty is specifically stated on theapplicable 3M product packaging or product literature,
3M warrants that each 3M product specification at thetime 3M ships the product. 3M MAKES NO OTHERWARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED,INCLUDING BUT NOT LIMITED TO, ANY IMPLIEDWARRANTY OR CONDITION OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE OR ANY
IMPLIED WARRANTY OR CONDITION ARISING OUT
OF A COURSE OF DEALING, CUSTOM, OR USAGE
OF TRADE. If the 3M product does not conform to thiswarranty, then the sole and exclusive remedy is, at 3M’soption, replacement of the 3M product or refund of thepurchase price.

Limitation of Liability
Except where prohibited by law, 3M will not be liable forany loss or damage arising from the 3M product, whether
direct, indirect, special, incidental or consequential,
regardless of the legal theory asserted, including
warranty, contract, negligence or strict liability.

3M Display Materials & Systems Division
3M Center, Building 235-1E-54
St. Paul, MN 55144-1000 U.S.A.
Phone
Web

1-800-3M HELPS
3M.com/displayfilms

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All other trademarks herein are the property of
their respective owners.
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