According to Tony
Abe, electrical engineer, the PY1105CK LED features
a bright GaP (Gallium-Phosphorus) die and an advanced new
lens design, which offers a wide 180-degree spatial distribution
or viewing angle. “The combination of the GaP die and
the new lens design’s viewing angle ensures superior
backlighting ,” Mr. Abe tells APPLIANCE. “High-quality
lighting with the PY1105CK LED is both visually appealing
and ergonomically necessary to create highly functional membrane
switches, displays, and indicators in appliance products.”
Having a wide,
180-degree viewing angle in a miniature surface mount LED
design is an important engineering achievement, Mr. Abe adds.
“It features a typical luminous intensity of up to 8.0
mcd (milli candelas), which is exceptional in a 1.6- x 1.25-mm
package, with a height of only 0.5 mm above the circuit board,
which allows the design engineer to design a very thin finished
product,” he explains.
LEDs that offer
a spatial distribution less than 180 degrees, and, depending
on other design and construction factors, can often result
in reduced brightness and luminous intensity, Mr. Abe continues.
“This can make a product look dull and lifeless,”
The new LED is
also said to bring manufacturers cost savings, as the wide
viewing angle and additional luminescence reduces the number
of LEDs necessary for a particular function. “This inevitably
reduces the volume of components and total cost,” Mr.
Abe says. “Reducing inspection and rework of printed
circuit boards in appliances also brings down total manufactured
cost and total lifecycle costs as well.”
number of LEDs also reduces Mean Time Between Failures (MTBF)
for the finished product, Mr. Abe adds, as less components
means less factors that can lead to a product’s failure.
The PY1105CK can
be used in several appliance applications, including microwaves,
washing machines, and dryers. It is available in yellow-green
(with a dominant wavelength of 572 nm) and features a typical
luminous intensity of up to 8.0 mcd @ 10 mA. Forward voltage
is typically 2.1 V and is available up to a maximum of 2.8
V. Operating temperature is -40°C to +85°C . The company
also plans to offer the LED in yellow (590 nm), orange (605
nm), and red (626 nm) colors in the near future.
PY1105CK LED from Stanley
Electric can be used for backlighting in membrane
switches as well as a wide range of displays and indicators
used in appliances.