FPD Inspection

FPD or flat panel display

Microspectrophotometers are used to test the color and intensity of each FPD pixel

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FPD or flat panel display

Typical test spectra from a flat panel display



FPD Inspection: Color, chromaticity, luminance, spectroscopy and film thickness of pixels and light sources.

Flat Panel Display, or FPD, is a device that consist of a series of colored lighted areas arranged in a pattern.  Controlled with electronics, they can be used as light sources or as high resolution displays for everything from televisions to computers.  There are many different designs resulting in different quality control challenges. 

Due to the nature of flat panel displays, they are manufactured with hundreds of rows of microscopic "pixels" on a surface.  In the next generation of FPD, such as those used in MP3 players and mobile phones, these pixels can be as small as 10 microns across.  Quality control of both the components and completed FPD devices is done by optical microspectroscopy.  Microspectrometers, such as those made by CRAIC Technologies, are used to measure the color and the intensity of the output from individual pixels, from groups of pixels and from the light sources.  They are can be used to map the color and intensity outputs of individual pixels or even entire displays.  This is important as manufacturers of flat panel displays need to make sure that all the different types of pixels are the same color and brightness.  A microspectrophotometer does this quickly and easily. 

To learn more about microspectroscopy and FPD analysis and testing, select one of the following links: 

What is a Microspectrophotometer?

Science of Microspectrophotometers

Colorimetry of Pixels and Displays

Relative Intensity Measurements

508 FPD™ Spectrophotometers for Microscopes and Probe Stations