A kind of LED backlight light adjusting system

A kind of LED backlight light adjusting system

  • CN 106,205,504 A
  • Filed: 08/12/2016
  • Published: 12/07/2016
  • Est. Priority Date: 08/12/2016
  • Status: Active Application
First Claim
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1. a LED backlight light adjusting system, it is characterised in that include MCU, MMI module, PWM light-adjusting module, multiselect one simulationSwitch and current detection circuit;

  • LED backlight has multiple LED, and multiple LED are divided into N group, forms the N bar lamp string of series connection, based on N bar lamp string shapeBecome N number of light emitting module;

    N is the integer more than or equal to 2;

    Current detection circuit includes measuring resistance Rx and voltage detection module;

    Multiselect one analog switch has N number of passage, is provided with N number of channel branch IO end and a public IO end;

    Multiselect one simulation is openedPass is additionally provided with channel selecting end;

    Described channel selecting end is connected with the I/O port of MCU;

    MCU outputs signals to channel selecting endControl any one channel conductive;

    MCU output pwm pulse is to PWM light-adjusting module;

    The public IO of output termination multiselect one analog switch of PWM light-adjusting moduleEnd;

    The positive terminal of N number of light emitting module connects multiselect one analog switch respectively and has N number of channel branch IO end;

    Bearing of N number of light emitting moduleExtreme all by measuring resistance Rx ground connection;

    The data-in port of the output termination MCU of voltage detection module.

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