FPD quality testing and defect detection

When testing FPD quality, or looking for defects, you do not always have one specific failure mode that you are testing. TrueTest software, the flagship of the TrueTest family, addresses this by providing:

• a comprehensive set of predefined tests,
• a flexible framework that allows you to apply a single test or sequence of tests as needed, quickly and efficiently, and
• a pass/fail report with as much detail as you need.

Turnkey System for automated optical inspection of FPD

The TrueTest software application has five main components:

• Test library
• Test sequencer
• Test manager (user-defined test parameters and pass/fail settings)
• Test execution, automated
• Report generator

TrueTest is easy to use. Any tests from the test library can be added to a test sequence (these are stored, so multiple sequences can be created and recalled as needed), and test parameters and pass/fail settings are input for each test. Then the entire sequence is run, end-to-end, automatically. Individual test results are displayed and can be recorded in a report.

Extensive selection of quality tests built-in

The standard test library provided with TrueTest covers standard quality tests and defect detection, including:

• Uniformity
• Gradient
• Line Defects
• Pixel Defects
• ANSI Brightness
• ANSI Color Uniformity
• Checkerboard Contrast
• Chromaticity
• Compare Points of Interest
• Points of Interest
• Color Edge Mura
• Color Mura
• Diagonal Pattern Mura
• Polarizer Deformation
• Random Mura
• Spot Pattern Mura

All of these tests allow you to set your own test parameters-such as the area to be examined-and pass/fail criteria.

Advanced mura detection tests are available in the optional TrueMURA Test Module. In addition, custom or user-written tests can be added to the test library at any time.

Designed for high-volume manufacturing applications

While TrueTest can be used for diagnostic testing of an FPD in a laboratory setting, it is really designed for high volume manufacturing applications:

• TrueTest supports both an administrator interface for defining tests and test parameters, and a restricted operator mode for running tests
• TrueTest interfaces to a video pattern generator or the device under test itself to control test patterns
• TrueTest testing can be initiated by a human operator or directly by a production control system (PCS) in a fully automated production environment
• TrueTest can interface to the PCS, a barcode reader or the equivalent to obtain information about the DUT; the test sequence and test parameters can be varied automatically from DUT to DUT based on this information
• TrueTest takes advantage of the high speed computing technology of modern PCs to take measurements and perform test analyses in parallel-thereby minimizing takt time

TrueTest is part of a field proven system for production testing

The TrueTest software is combined with any ProMetric Imaging Colorimeter to create a complete testing system. The specific ProMetric imaging colorimeter chosen will depend on your application's requirements for resolution, accuracy, and cost.

When you install TrueTest, Radiant Zemax application engineers will work with you to integrate and initialize the system, and train you how to perform those operations and how to maintain the system.

The TrueTest product family is field-proven, with installations worldwide, testing millions of FPDs for a broad range of products. Once in operation, we support you with our global technical support team and distributor network.