Led arrangement with bypass driving

Led arrangement with bypass driving

  • CN 101,779,522 B
  • Filed: 07/16/2008
  • Issued: 11/19/2014
  • Est. Priority Date: 07/23/2007
  • Status: Active Grant
First Claim
Patent Images

1. a LED matrix, comprises LED string (1000) and driver circuit arrangement (2000),Described LED string (1000) comprises at least two LED sections (10,20;

  • 100,200), described at least two LED sections (10,20;

    100,200) electricity series connection,Each LED section (10,20;

    100,200) comprise at least one LED (10,20,101,102,103,201,202,203),Described driver circuit arrangement (2000) comprises the segment driver unit (110,210 for each LED section;

    110 '"'"', 210 '"'"';

    110 ", 210 "),Each segment driver unit (110,210 wherein;

    110 '"'"', 210 '"'"';

    110 ", 210 ") comprising;

    with corresponding LED section (10,20;

    100,200) electricity the first switch element (12,22) in parallel, for controlling during use by this LED section (10,20;

    100,200) electric current (50,60;

    51,61;

    52,62;

    53,63;

    54,64;

    55,65;

    56,66), when the first switch element is closed, by the current stops of this LED section, thereby this LED section is closed, and it is characterized in that,Each segment driver unit (110,210;

    110 '"'"', 210 '"'"';

    110 ", 210 ") comprise the first capacitor (13,23), described the first capacitor (13,23) and described corresponding LED section (10,20;

    100,200) at least one LED electricity is in parallel,Wherein, for each LED section and segment driver unit thereof, when described the first switch element is opened, electric current flows through described at least one LED, and when described the first switch element is closed, electric current flows through described the first switch element but not described at least one LED,Each segment driver unit (110,210 wherein;

    110 '"'"', 210 '"'"';

    110 ", 210 ") comprise second switch element (14,24), described second switch element (14,24) is connected with described the first capacitor (13,23) electricity.

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