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AMOLED displays with multiple readout circuits

  • US 10,460,660 B2
  • Filed: 05/14/2018
  • Issued: 10/29/2019
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A system for determining the operational voltage VOLED of a light-emitting device in a pixel in an array of pixels in a display, the pixel including a storage capacitor coupled to a drive transistor for supplying current to said light-emitting device as a function of a programming of the storage capacitor, the system comprising:

  • a controller adapted to;

    vary a first programming of the storage capacitor and measure a first current supplied to said light-emitting device via said drive transistor, until reaching a final first programming of the storage capacitor when the first current equals a predetermined current, wherein one of the first current and the predetermined current is a function of the operational voltage VOLED of said light-emitting device; and

    extract the value of the operational voltage VOLED of said light-emitting device with use of the final first programming of the storage capacitor.

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