VIVISUN LED - Applied Avionics

1 SUNLIGHTREADABLELEDHigh Reliability Full SpectrumLED Lighted Pushbutton SwitchVIVISUN LEDThe Complete SwitchVIVISUNSee it. Believe Aerospace Optics, Inc. Data Sheet No. 12-2001-04 Rev. B 2002 Aerospace Optics, Sandy Lane, Fort Worth, Texas, Reliability LED Lighted SwitchesLife-of-the-Platform Service LifeMaintenance Free OperationLow Power and Low Touch TemperatureNow with Voltage-Controlled Dimmingand a SpectrumTMof Sunlight Readable ColorsDesigned, tested and qualified to MIL-PRF-22885/108 Listed on the Qualified Products List (QPL) 22885 VIVISUN LEDThe Complete SwitchTMVIVISUNSee it. Believe Aerospace Optics, Inc.

2 Data Sheet No. 12-2001-04 Rev. B 2002 Aerospace Optics, Inc. Page 13201 Sandy Lane, Fort Worth, Texas, engineers in today s aerospaceindustry are faced with the challenge ofdesigning performance oriented avionic sys-tems with high reliability. In pursuit of thisgoal they have wanted to design out low reli-ability, failure prone incandescent lighting infavor of LED (Light Emitting Diode) light-ing which has the advantage of high reli-ability. However, they had previously foundthat in using LEDs they had to sacrifice qual-ity lighting and had to employ complex pulsewidth modulation techniques for uniformlow level dimming.

3 Aerospace Optics hasresponded to this need by developing a prod-uct to help these design engineers with theirneed for quality lighting, high reliability andsimple voltage-controlled dimming in lightedpushbutton LEDThe VIVISUN LED is an LED lightedpushbutton switch that combines the excel-lent sunlight readability our customersexpect from VIVISUN products with thehigh reliability afforded by LEDs. This prod-uct was developed to solve the problemsfaced by our customers who have wantedLED reliability but have been unable to getLED reliability with high quality VIVISUN LED high performancelighting provides sunlight readability exceed-ing the requirements of MIL-PRF-22885F,compliance with the NVIS requirements ofMIL-L-85762A, voltage dimming andimpressive uniformity and viewing advanced technology switches andindicators are setting new industry standardsfor LED lighting and these innovativeswitches are available only from AerospaceOptics.

4 The technical leader in sunlight read-able switches and LED in Multifunction DisplaysElectronic multifunction displays are beingused in ground vehicles, on shipboard and inaircraft glass cockpits to display more andmore instrumentation and control infor-mation. This has caused a reduction in therequired numbers of individual pushbuttonswitches and indicators. However, there aremany applications where lighted pushbuttonswitches are used to enhance electronic dis-plays as shown in the photo above. In manycases these switches need a higher level ofreliability and can be upgraded to VIVISUNLED switches which offer the highest relia-bility, lowest maintenance and best sunlightreadability VIVISUN LED AdvantageLighted pushbutton switches and indica-tors have customarily used incandescentlamps to achieve high brightness and sun-light readability.

5 Since the lighting is pro-duced by the heating of a lamp filamentwhose radiant emissions are primarily heat,there are many problems resulting in lowreliability. This leads to high failure rates forincandescent lamps requiring constantrelamping resulting in high maintenancethroughout the service life of the aircraft. In contrast, reliability has been the advan-tage for LEDs making them highly desirableand serving as the answer to low reliabilitylamps. However, previous LED lighting hasbeen a big disappointment because of itsfailure to provide good lighting for sunlightreadability, uniformity, viewing angle andcould only be dimmed uniformly using pulsewidth modulation.

6 So, in spite of all theproblems, incandescent lamps have contin-ued to be used because of the need for highbrightness and simple voltage VIVISUN LED lighting advantage isthat it eliminates the problems caused byincandescent lamps and it also solves theproblems associated with LED lighting. TheVIVISUN LED lighting completely obso-letes incandescent lighting and truly fulfillsthe expectations for reliable LED VIVISUN LED is the low power, highreliability solution to sunlight readable, NVIS compliant lighted pushbutton switches VIVISUN LED lighting eliminatesthe incandescent problems of high powerconsumption, high heat generation and hightouch temperature by producing a brightnessequivalent to incandescent while using lessthan half as much power.

7 The poor reliabili-ty and high maintenance relamping problemsassociated with incandescent lamps are elim-inated by using highly reliable, long lifeLEDs in a fault tolerant circuit design. LEDsare not susceptible to shock and vibrationfailures and do not have the high inrush cur-rent that incandescent lamps experiencewhen energized. The VIVISUN LED light-ing eliminates all of the incandescent lampproblems and still has high brightness, sun-light readability, viewing angle, uniformity,excellent color separation and is uniformlydimmable with voltage-controlled on QPL 22885, ISO 9001 RegisteredThe VIVISUN LED lighted pushbuttonswitches are fully qualified to MIL-PRF-22885/108 and listed on the QualifiedProducts List (QPL) 22885.

8 Our QualityAssurance System is ISO 9001 registered andour test lab is DSCC certified. AerospaceOptics is committed to manufacturing highquality products and to ensuring total cus-tomer satisfaction by providing outstandingcustomer service and defect-free productswith exceptional delivery and product : Courtesy of LockheedMartin Missile and Fire ControlLED The Complete Switch Aerospace Optics, Inc. Data Sheet No. 12-2001-04 Rev. B 2002 Aerospace Optics, Inc. Page 23201 Sandy Lane, Fort Worth, Texas, Readable and Non-GhostingIn complex glass cockpits, the workloadand demand on the pilot is extensive and thepossibility of misinterpreted annunciators can-not be tolerated.

9 This has placed the sunlightreadability of LED lighted switches and indi-cators at the highest priority. VIVISUN LEDswitches and indicators meet these require-ments head on, providing unconditional sun-light readability even in the most demandingdirect sunlight LED lighted pushbuttonswitches and indicators are certified to meetthe strict MIL-PRF-22885F requirements forsunlight readability. All VIVISUN LED stan-dard colors have on to background contrastsgreater than or equal to in an ambient illu-mination of 10,000 foot-candles. This contrastis also certified for all glare producing anglesup to and including 15.

10 Another area of tremendous pilot concernis the possibility of Ghost Legends fromunenergized displays. Direct sunlight can causea false image to be reflected from an unlighteddisplay, thus causing possible confusion andmisinterpretation. The VIVISUN LED dis-plays remain blacked out or Dead Faced when not energized and meet the MIL-PRF-22885F unlighted contrast requirement not toexceed the absolute value of in an ambientillumination of 10,000 VIVISUN LED means combin-ing unrivaled sunlight readability with the cool,reliable, low power operation of Compliant andSunlight ReadableNighttime operations are now an integralpart of military strategy.