Pixel circuit, display, and method
AssigneeIgnis Innovation Inc.
InventorsArash Moradi, Jafar Talebzadeh, Junhu He, Shuenn-Jiun Tang
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Abstract
Active Matrix Organic Light Emitting Diode (AMOLED) displays, novel pixel circuits therefor, and methods of programming the pixel circuit and measuring the current of the pixel circuit and OLED thereof are disclosed. One pixel circuit includes four TFT transistors, a storage capacitor and an OLED device and is programmed with use of voltage supplied through a data line. One method measures currents of the OLED and the pixel circuit through the data line by a readout circuit.
Claims22
A display system comprising:
- an array of pixel circuits arranged in rows and columns, a pixel circuit of the array of pixel circuits including:
- a drive transistor including a source terminal coupleable to a data line of the display system;
- a storage capacitor coupled across a gate terminal and a source terminal of the drive transistor;
- and
- a light emitting device coupleable to the source terminal of the drive transistor, and
- a controller for driving the pixel circuit in a plurality of operation states for the pixel circuit including a programming state for programming the storage capacitor of the pixel circuit with use of a data voltage provided over the data line, and a measurement state for measuring a current from the pixel circuit over the data line.
A method of driving a display system, the display system including an array of pixel circuits arranged in rows and columns, a pixel circuit of the array of pixel circuits including:
- a drive transistor including a source terminal coupleable to a data line of the display system;
- a storage capacitor coupled across a gate terminal and a source terminal of the drive transistor;
- and a light emitting device coupleable to the source terminal of the drive transistor, the method comprising:
- driving the pixel circuit in a plurality of operation states for the pixel circuit including:
- programming the storage capacitor of the pixel circuit with use of a data voltage provided over the data line during a programming state, and
- measuring a current from the pixel circuit over the data line during a measurement state.
Dependencies are inferred from the claim text.