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US 2012/0056867 A1Published application
System and method of leakage current compensation when sensing states of display elements
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorsWilhelmus Johannes Robertus Van Lier, Didier H. Farenc
Life of this patent
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Abstract
This disclosure provides systems, methods and apparatus for calibrating display arrays. A leakage compensation circuit is provided in conjunction with a circuit for sensing display element states. The leakage compensation circuit may include a leakage current integrator and a voltage to current converter.
Claims15
A method of compensating for leakage current during a state sensing test in a display array, the method comprising:
- connecting one or more common lines to be tested to a leakage compensation circuit;
- generating a compensating current in the leakage compensation circuit;
- and
- connecting both the one or more common lines to be tested and the leakage compensation circuit to a state sensing circuit.
1 more element
An apparatus for calibrating drive scheme voltages, the apparatus comprising:
- an array of display elements;
- one or more lines in the array, each line connecting display elements along a respective row of the one or more rows;
- driver circuitry connected to the one or more lines in the array;
- display element state sensing circuitry coupled to the one or more lines in the array;
- and
- a leakage compensation circuit coupled to the one or more lines in the array.
3 more elements
An apparatus for calibrating a display, the apparatus comprising:
- an array of display elements;
- a driver circuit coupled to the array of display elements;
- means for sensing display element states;
- and
- means for compensating for leakage current when sensing display element states.
2 more elements
Dependencies are inferred from the claim text.