G01R13/401 - CPC Classification

Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for continuous analogue, or simulated analogue, display

• G01R13/402 » {using active, i.e. light-emitting display devices, e.g. electroluminescent display } 7
• G01R13/403 » {using passive display devices, e.g. liquid crystal display or Kerr effect display devices} 3