Current Voltage Luminance Testing System for OLEDs

This is going to be a message board for a OLED/LED Current-Voltage-Luminance (IVL) testing system that I am in process of developing. The system will be capable of electrically categorizing 36 pixels(9 Devices, 4 pixels each) by performing a reverse bias to forward bias voltage sweep. The system will also measure the light output of a pixel by monitoring the current(A) output of a photodiode. To calibrate the light output the pixels are measured at fixed current density specified by the user before the IVL test using a Luminance meter. The system consist of two keithley 2400 source meters and a keithley 7001 Switch System. One keithley is use to source voltage(V) measure current(A) and the other is used to monitor photodiode current. The switch is used to switch between the 36 pixels.
Eventually I will post the entire project but for now I would like to get some comments on performing a single IVL sweep on a single pixel. I was unable to get the triggering feature to work with keithley's in labview so I had to use sequence structures. I just took the Labview Core 3 and DAQ classes, if possible I would like to implement some of the parallel processing which I learned. I will attach the file VI's in the next post.

Here are the important vis
Attachments:
singleJV.vi ‏54 KB
InitKeithLV.vi ‏18 KB
InitKeithJV.vi ‏17 KB

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Last edited by ANOKNUSA (2011-03-01 14:55:46)

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As a member of the Nexjen Systems team, the Test System Engineer / LabVIEW Developer performs engineering design, software development and hardware specification for custom test & measurement systems.
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Nexjen Systems is a premier integrator of LabVIEW-based, automated test & measurement systems. We pride ourselves on providing a very high level of technical value to our clients through a range of services focused on test system engineering, construction and deployment. Nexjen Systems is located in Charlotte, our clients are located around the world. Learn more at www.nexjen.com .
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