Turnkey system for automated visual inspection of illuminated keyboards and keypads
Illuminated keyboards and keypads can exhibit variations in brightness and color from key to key, and even within keys, that are noticeable to the end-user, and which detracts from their experience with the product. In extreme cases, these variations strongly impact product usability.
PM-KB is a dedicated, turnkey system for automated visual inspection of illuminated keyboards
A member of Radiant Vision Systems' TrueTest family, the PM-KB system combines application-specific software and a ProMetric® Imaging Colorimeter to perform rapid, automated visual inspection of back-illuminated keyboards and keypads for character luminance and chromaticity, and overall keyboard luminance and color uniformity. PM-KB also provides optical character recognition, allowing the software to determine the keycaps are installed correctly and each key is in its proper location. PM-KB is a dedicated testing system and is easy to set-up and operate.
PM-KB uses the ProMetric Imaging Colorimeter to test all keys and characters simultaneously, capturing and processing data much faster and more consistently than a human inspector or a spot measurement device.
Multiple testing options
PM-KB allows you to define a complete set of measurement conditions and pass/fail criteria for specific points of interest on any keyboard or keypad, including:
- the total number of allowed individual character failures;
- the minimum luminance uniformity between characters; and
- the maximum color difference between characters (when color is measured).
Different keyboard models are stored individually and can be automatically applied based on the model being tested to simplify switching between multiple models. All test parameters and pass/fail criteria are set on installation and are protected from change under ordinary operations.
Designed for high-volume manufacturing
On the production-line, PM-KB presents a simple, easy-to-use interface, with straight-forward test initiation commands and pass/fail indications. PM-KB can record device barcodes (or accept input from a production control system) as part of the testing process. Test reports can also be generated to preserve data for later examination.
To allow sequential testing of multiple keyboard or keypad models, PM-KB maintains a database of keyboard configurations, testing parameters, and keyboard specific pass/fail criteria definitions. These can be quickly changed in production, making it simple to change models or pass/fail requirements. Unlike with human operators, no retraining is required!
To ensure line-to-line and location-to-location consistency, Radiant provides a special purpose calibration light source for use with the PM-KB system that ensures common calibrations between the ProMetric systems used.
Multiple system configurations
PM-KB systems can be configured with any ProMetric Imaging Colorimeter or Photometer, providing multiple options to achieve the pixel resolution, dynamic range, and cost required for your application.
Supported by Radiant's global support staff and distributor network, PM-KB is field-proven and has been used to test millions of illuminated keyboards and keypads.