Device and method for controlling light emission

Device and method for controlling light emission

  • CN 101,772,988 B
  • Filed: 07/31/2008
  • Issued: 11/26/2014
  • Est. Priority Date: 08/06/2007
  • Status: Active Grant
First Claim
Patent Images

1. a light-emitting device (1), this light-emitting device comprises:

  • A) at least three light sources (2 1, 2 2, 2 3), B) for to described light source (2 1, 2 2, 2 3) parts (3 of energy are provided 1, 3 2, 3 3), C) for to from whole described light sources (2 1, 2 2, 2 3) transducer (5) that detects of the light that sends, and D) for to described to described light source (2 1, 2 2, 2 3) parts (3 of energy are provided 1, 3 2, 3 3) control unit (4) controlled, Wherein, described control unit (4) is designed to;

    -in the following manner in calibration phase to the described parts (3 that energy is provided 1, 3 2, 3 3) control, in a series of measurement period, detected from described light source (2 by described transducer (5) 1, 2 2, 2 3) light that sends;

    And -based on calculating each independent light source (2 from the information of described transducer (5) reception 1, 2 2, 2 3) brightness, This light-emitting device is characterised in that;

    The light being detected by described transducer (5) at least one measurement period in described measurement period comes from described light source (2 1, 2 2, 2 3) in several, and In each measurement period, always make described light source (2 1, 2 2, 2 3) in an only light source be darkened to the bright-dark degree lower than threshold value.

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