Conductive Technologies :: Displays & Illumination

DISPLAYS

Conductive Technologies pioneered techniques for embedding light-emitting subminiature radial lead diodes (LEDs) wholly within the matrix of the membrane key switch. This provides read-out capabilities for both graphic and function indications while eliminating separate LED circuit boards. Certain LED configurations are readable up to 165° from center.

DISPLAY ILLUMINATION

Custom Membrane
Switch-Mounted LED Systems (SML)

"S" Type Construction

Utilizes glass-epoxy based "Chip" style LEDs
Does not require additional rear spacer thickness
Typical product thickness of .080" *
May be configured to enhance "off-center" viewing angles up to 165 degrees

*NOTE: Actual finished package thickness dependent upon over-all design specifications and limitations.

SML Specifications

Type	Color	Typical Luminous Intensity (MCD)	Peak Emission Wavelength (nM)	Typical Forward Voltage (Volts)	Continuous Forward Current (mA)	Reverse Voltage (Volts)	Power Dissipation @ 25° C (mW)
S	Red Green Yellow Blue White	@20mA 4.5 3 3.2 7 112	660 560 580 470 -	@20mA 1.7 2.1 2.2 3.5 3.0	60 30 30 25 25	4 4 4 5 5	60 75 75 60 60

Electroluminescense ELL)
for Membrane Switches
Electroluminescence (ELL) involves wafer-thin flat lamps to provide interior switch illumination without incandescence. Other illumination options include fiber-optics and incandescence.

ELL Specifications

Switch
Switch actuation life (both tactile and non-tactile):	Greater than 1 million cycles
Switch overall minimum thicknesses (including EL lamp):	Tactile:	.55"
	Non-tactile:	.042"
	Front panel only:	.024"
Switch and EL connectors available:	FCI® and Tyco Electronics^® crimp-style terminals
Electrical
Nominal voltage:	120VAC
Nominal frequency:	400Hz
Nominal current per square inch lit area (at nominal voltage and frequency, color green):	.79 mA
Initial capacitance (Nom.):	3.3nf/in²
AC preferred waveform:	Sinusoidal
AC input voltage range:	115VAC to 300VAC
AC operation-frequency range:	50Hz to 2500Hz
DC power options:	DC to AC inverter module
Inverter input voltage options:	5VDC to 24VDC
Inverter input voltage options:	5VDC to 24VDC
Physical
EL type:	A.C. thick film
Lamp construction:	All plastic solid state EL
Nominal thickness:	0.012"
Emitted heat:	minimal
Minimum radius at a 180 degree bend:	0.50"
Maximum lit area:	9.5" x 17.0"
Lit area to sealed edge - Nom. dimension:	.050"
Minimum tail length:	0.250"
Optical
Base colors available: Typical initial brightness at nominal voltage and frequency: Blue green: White: Green:	13 ft-L 10 ft-L 13 ft-L
Brightness uniformity:	+/-10%
Useful life at nominal voltage and frequency:	Exceeds 10,000 hours
Brightness and life are dependent on input voltage and frequency.
Environmental
Operating temperatures:	- 50°C (- 58°F) to + 50°C (+ 122°F)
Moisture resistance:	Up to 95% RH

GRAPHICS

Conductive Technologies membrane switches define the design ideal of "matching form to function." They perform superbly plus they look terrific! Faceplate graphics are the creations of - quite simply - the best art studio and CAD department in the industry: Ours! Conductive Technologies switch faceplates realize the maximum in graphic potential, using both surface and subsurfacing imaging techniques. They employ brilliant customized inks, computerized, spectrographic color matching, crisp and unequivocal legends, specialized opaquing and transparency techniques to achieve lenses, windows, and access ports or "dead-fronts" with appropriate degrees of clarity.

Other possible graphic effects include brilliant, full-color pictorial reproduction and projections and spectral gradations through four-color process techniques.