Intellectual Property

Proprietary information and trade secrets

EOSD practices technology established over many years in the field of optical sensor technology, in particular design and development of infrared sensors.


EOSD has developed and patented new novel technology, including the Active Microbolometer and Mosaic Pixel technology.

The active microbolometer is an infrared (IR) sensitive detector which functions as a thin film transistor (TFT). It is based on amorphous silicon technology, and can be fabricated in a foundry which produces amorphous silicon devices such as TFT liquid crystal displays, image sensors and solar cells.


  1. K.C.Liddiard, "The active microbolometer: a new concept in infrared detection", Proc SPIE 5274, p.227, 2003

  2. US patent 6,927,392, August 2005

Mosaic pixel microbolometer technology is a means of achieving very high sensitivity in IR sensors, with applications in industry and home security, fire detection, IR thermography and non-contact temperature measurement.


  1. US Patent 7,791,026, September 2010

  2. K.C.Liddiard, "Novel concepts for low-cost IR security sensors", Proc SPIE, 5783, p.693 (2005)

  3. K.C.Liddiard, "PIR security sensors: developing the next generation", Proc SPIE, 6542, p.1R (2007)

  4. K.C.Liddiard, “Application of mosaic pixel microbolometer technology to very high performance, low cost thermography and pedestrian detection”, Proc. SPIE 8704, pp. 3F1 (2013)