Steve Jobs


“Scattering Cold Illuminating Light Source (SCILS)”, 1999.
“LED Illumination Control System (ICS)”, 2001.
“Illumination Control System for Light Emitters”, 2003.
“Improvements to Lighting Control Systems”, 2003.
“Collimated Illumination System using an Extended Apparent Source Size" 2008.
"Power-Configurable, High Reliability Hybrid Control System" 2011.
"Power control system for an illumination system", 2012

“Illumination Control System for Light Emitters”, 2003.

Granted UK: GB 2 408 315;

Granted USA No: 7 923 935; European Application No: 05735894.7
Filed: 18th September, 2003; expires 20th February, 2027

The Illumination control system for Light Emitters (ICSLE) provides a means for controlling an LED light fixture that contains an optical cover and an optical sensor which is able to detect colour and intensity to modulate the light emitters to create a specific colour point. The light emitters may be defined as a traditional light source or LEDs as well as a hybrid combination of traditional and LED light sources. The precise colour control enables variable CCT lighting fixtures to be produced with very high colour consistency between lighting fixtures.

click image to enlarge

Patent areas covered:

  • Optical Feedback
  • Active thermal management of fixture
  • Temp., Current, Voltage and Colour 


  • Colour mixing of LEDs
  • Active real-time CCT & CRI control
  • Mixed Lamp Technology
  • Optics taught within LED fixture 
  • Method for Constant Lumen control
  • Closed Loop feedback control

Claim 1: A lighting fixture comprising a plurality of emitters and a cover through which light from the emitters travel when they are activated, an optical sensor arranged to detect light that has been totally internally reflected in the cover.

click image to enlarge

Figure from the UK Patent which
shows one embodiment of the colour
control system (right)

  • The advantageous properties of
    the ICSLE patent are:
  •  A unique method to control the
    colour point of lighting fixtures
  •  Cover the use of traditional, LED
    and a combination of light sources
  •  The use of heat sinks including
    active technology 
  •  A variety of current control technologies such as DC, PAM, PWM, PFC 
  •  Variable CCT and CRI setting and accurate colour consistency
  •  The use of fluorescent tubes and LEDs combined
  •  Ensuring the lumen maintenance of a fixture remains constant.