×

Liquid crystal display device having an improved lighting device

  • US 20070052664A1
  • Filed: 11/06/2006
  • Published: 03/08/2007
  • Est. Priority Date: 10/12/2000
  • Status: Active Grant
First Claim
Patent Images

1. A liquid crystal display device comprising:

  • a liquid crystal display panel having a plurality of pixels;

    a lighting device having a light source and projecting light generated by the light source on the liquid crystal 15 display panel; and

    an AC-generating circuit which comprises an inverter circuit), a transformer, and a control circuit, and which generates and supplies an AC current to the light source, wherein;

    the AC-generating circuit is configured such that the AC-generating circuit supplies a first current during a first period and a second current smaller than the first current during a second period to the light source alternately;

    the control circuit generates rectangular DC voltage pulses based on a ratio of the first period to the second period;

    the inverter circuit converts the rectangular DC voltage pulses from the control circuit into an AC current to be supplied to a primary side circuit of the transformer; and

    a secondary side circuit of the transformer is coupled to the light source.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×