US 2014/0176622 A1 · ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF DRIVING THE SAME

Abstract

Disclosed is an organic light emitting display device. The organic light emitting display device includes a display panel including a plurality of pixels formed in intersection areas between a plurality of gate lines, a plurality of data lines, and a plurality of sensing lines, a gate driver supplying a gate signal to the gate lines, a plurality of data driving ICs including a data driver, supplying data voltages to the data lines, and a sensing unit including a plurality of ADCs that each sense characteristic change of a driving transistor included in a corresponding pixel to generate sensing data, a memory storing a gain error and offset error of each ADC, and a timing controller correcting the sensing data on a basis of the gain error and offset error, modulating input data on a basis of the corrected sensing data, and supplying the modulated data to the data driving ICs.

Claims10

Dependent claims

An organic light emitting display device comprising:

a display panel configured to comprise a plurality of pixels that are respectively formed in a plurality of intersection areas between a plurality of gate lines, a plurality of data lines, and a plurality of sensing lines;
a gate driver configured to supply a gate signal to the plurality of gate lines;
a plurality of data driving ICs configured to comprise a data driver, which respectively supplies data voltages to the plurality of data lines, and a sensing unit comprising a plurality of analog-to-digital converters (ADCs) that each sense a characteristic change of a driving transistor, comprised in a corresponding pixel, through a corresponding sensing line to generate sensing data;
a memory configured to store a gain error and an offset error of each of the plurality of ADCs;
and
a timing controller configured to correct the sensing data on a basis of the gain error and the offset error, modulate input data on a basis of the corrected sensing data, and supply the modulated data to the plurality of data driving ICs.

3 more elements

A method of driving an organic light emitting display device, including:

a display panel configured to include a plurality of pixels that are respectively formed in a plurality of intersection areas between a plurality of gate lines, a plurality of data lines, and a plurality of sensing lines;
and a plurality of data driving ICs including a built-in sensing unit that includes a plurality of analog-to-digital converters (ADCs) selectively connected to the plurality of sensing lines, the method comprising:
(A) calculating a gain error and an offset error of each of the plurality of ADCs on a basis of output data of each ADC based on a test voltage supplied to the plurality of sensing lines;
(B) sensing a characteristic change of a driving transistor, comprised in each of the plurality of pixels, through a corresponding ADC to generate sensing data of each pixel;
(C) correcting the sensing data on a basis of the gain error and the offset error;
and
(D) modulating input data on a basis of the corrected sensing data to supply the modulated data to the plurality of data driving ICs.

4 more elements

Dependencies are inferred from the claim text.

Organic light emitting display device and method of driving the same

Life of this patent

Organic light emitting display device and method of driving the same

Life of this patent

Abstract

Claims10