Control device

Control device

  • CN 1,755,447 A
  • Filed: 08/17/2005
  • Published: 04/05/2006
  • Est. Priority Date: 08/18/2004
  • Status: Active Application
First Claim
Patent Images

1. control device that is used to control back light unit, this back light unit has one group of light-emitting component that comprises red light-emitting component, green luminousing element and blue light emitting device, and the light-emitting component of different colours separately is electrically connected, and this control device comprises:

  • Current-source arrangement, it is used for providing predetermined drive currents to this group light-emitting component;

    The luminous quantity pick-up unit, it is used to detect from the amount of the light of this group light-emitting component emission and the funtcional relationship of the electric current that provides from current-source arrangement;

    Temperature-detecting device, it is used to detect the temperature of back light unit;

    The quantity of reference light therefor output unit, it is used to export the quantity of reference light therefor of the light-emitting component of every kind of color;

    AndControl device, be used for the Control current source apparatus so that make it according to by the detected luminous quantity of luminous quantity pick-up unit, provide constant drive current for blue light emitting device, and predetermined drive currents be provided for red light-emitting component and green luminousing element according to the constant drive current that offers blue light emitting device by the detected temperature of temperature-detecting device with from the quantity of reference light therefor of quantity of reference light therefor output unit output.

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