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. This inconsistency can detract from the user experience and, in extreme cases, these variations may strongly impact product usability.
A member of the Radiant Vision Systems ProMetric Software family, the PM-KB system combines application-specific software and a ProMetric® Imaging Colorimeter or Photometer to perform rapid, automated visual inspection of backlit keyboards and keypads for character luminance and chromaticity, and assess overall keyboard luminance and color uniformity. PM-KB also tests to ensure that key caps are installed correctly and that 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 a ProMetric imager 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.
PM-KB allows users 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;
the maximum color difference between characters (when color is measured).
Different keyboard models are stored individually for reference. To simplify switching between multiple models, you can automatically apply a reference model based on the model being tested, including size and arrangement of keys, or language and characters of any type.