BACKLIGHTING WITH JULIA-A
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Data measured with 4 LEDs in square arrangement with 100 mm spacing through white semi-transparent PC sheet.
|LED type||Optimal height||min/avg||min/max|
|Rebel ES||ca.50 mm||0.94||0.90|
SIMULATIONSBack lighting setups can’t usually be simulated with light simulation software like Dialux. Distances on the backlighting setups are usually few centimeters so accurate simulations require near field ray tracing. Light transmission and diffusive properties of the front panel needs to be taken into account for accurate simulation.
LED ARRAY ARRANGEMENTS
Square arrangementSquare arrangement is probably the most common way to build the LED array. Lenses like Julia-A usually have round light distribution pattern so the performance is not optimal in square arrays. Julia-A still manages to have excellent performance when used in square arrangements.
Equilateral triangle arrangementEquilateral triangle arrangement is more suited for lenses with round light distribution. LEDs are spaced more evenly than in standard square arrangement. Light patterns of each LED overlap more evenly which leads to better uniformity in many cases.
The information contained herein is the property of LEDiL Oy, Joensuunkatu 13, FI-24100 SALO, Finland and is subject to change without notice. Please visit www.ledil.com for additional information, such as the latest photometric files, 3D mechanical models, and application notes relating to handling, gluing and taping.