98-0440-4275-6 3M, 98-0440-4275-6 Datasheet - Page 3

• Manufacturer Part Number: 98-0440-4275-6
• Description: DBEF-D400 0 DEGREE 14" X 14"
• Manufacturer: 3M
• Series: Vikuiti™r
• Type: Film, Dual Brightness Enhancement-Diffuse 400 (DBEF-D400)r

Specifications of 98-0440-4275-6

• Size: 14" x 14" (356mm x 356mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 3M5653-KIT; 51128773307; 98044042756

To help you orient the film, the sheets will have a small notch cut into one of the corners. Hold the sheets with the
cut notch in the upper right-hand corner to identify the prism direction for square parts and rectangular parts with
vertical prisms. Orient the notch to the lower right hand corner for rectangular parts with horizontal prisms as
illustrated below. When held like this, you will be looking at the upper surface with the prismatic structure, which
must face the LC glass module, and away from the backlight.
Ty p i c a l A p p l i c a t i o n
The Vikuiti BEF film family increases on-axis brightness by compressing light into a narrower viewing angle. It is
mounted with the prisms running either vertically or horizontally. The compressed viewing angle will be primarily
on the plane that is 90 degrees away from the direction of the prisms. In other words, if the prisms are running
vertically, the viewing angle will be compressed in the horizontal plane, and with a slight compression in the
vertical plane. Likewise, if the prisms are running horizontally, then the viewing angle will be compressed in the
vertical plane, with a slight compression in the horizontal plane.
As is shown in the “Typical Application” above, Vikuiti BEF film must always be mounted with the prisms facing the
LC module, and away from the backlight. If a second sheet of Vikuiti BEF film is to be used to gain even greater
brightness, its prism direction must be 90 degrees away from the prism direction of the first sheet, and the viewing
angle will then be compressed in both the horizontal and vertical planes.
If a sheet of the Vikuiti DBEF film family is to be included for maximum brightness, it should always be mounted on
top of the Vikuiti BEF film, closest to the LC module.