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Inspecting method and apparatus for a led matrix display

  • US 20060015272A1
  • Filed: 11/03/2003
  • Published: 01/19/2006
  • Est. Priority Date: 11/06/2002
  • Status: Active Grant
First Claim
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1. A method for sensing a light emissive element (25) in an active matrix display pixel cell (20;

  • 20

    ), further comprising a data line (21) connectable to a drive element (24) and to a first electrode (29) of the emissive element (25), said method comprising;

    during repeated output periods, connecting the data line (21) to the drive element (24), and providing on the data line (21) a drive signal (V) to cause the emissive element (25) to generate light, and during a sensing period, between two output periods, connecting the data line (21) to the first electrode (29) of the emissive element (25), providing on the data line (21) a sensing voltage (V1) to reverse bias the emissive element (25), and detecting any leakage current (IL) flowing through the emissive element (25).

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